• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    For an efficient, cost-effective and at the same time flexible or configurable test arrangement for energy storage from several energy storage modules to a plurality of energy storage units is proposed, an AC-DC converter (2) on the output side with at least one bidirectional isolated module-DC-DC converter (5 ^ ... 5n ), wherein the output of the bidirectional isolated module-DC-DC converter (5! ... 5n) is connected to a plurality of parallel-connected cell-to-DC converters (6n ... 6n m) and the outputs of the cell direct current DC-DC converter (6n ... 6n m) as outputs (A1 +, A i .., A ^, Ax.) Of the test arrangement (1) are guided to the outside.
    公开号:AT511890A2
    申请号:T50513/2012
    申请日:2012-11-14
    公开日:2013-03-15
    发明作者:
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    AV-3504 AT
    Test arrangement for an energy store
    The subject invention relates to a test arrangement for an energy storage device having at least one energy storage module with a plurality of energy storage units, with an AC-DC converter connected on the input side to a power supply, and the use of such a test arrangement in a test and Formiersystem.
    Current cell testers work largely with inefficient linear position controllers and convert the entire discharge energy into heat. This results in high costs for efficient cooling systems and high energy costs in the production and testing of batteries, e.g. for formation, quality inspection, long-term tests, emulation, etc.
    Occasionally also regenerative switching converters are used for cell testers, these are complicated, expensive and have a poor efficiency, since they have to map a very high voltage ratio, e.g. from 3V to 400V.
    It is an object of the subject invention to provide an efficient, inexpensive and at the same time flexible or configurable test arrangement.
    This object is achieved according to the invention in that the AC-DC converter is connected on the output side to at least one bidirectional isolated DC-DC converter, wherein the output of the bidirectional isolated DC-DC converter with a plurality of parallel cell DC-DC Gleichstromwandlem is connected and the outputs of the cell-DC to DC converter are passed as an output of the test device to the outside. Through this hierarchical structure of the test arrangement by means of isolated DC-DC converters, the test arrangement can be configured extremely flexible, in particular so that a wide variety of expansion stages are possible. From individual energy storage units to individual energy storage modules and entire energy storage can thus be tested and formed without having to change the internal structure of the test arrangement. The change of configuration can be done very easily via controllable switch.
    Basically, the efficiency of a converter is known to be better with higher power and higher voltage. In the present hierarchical design of the test arrangement, the AC-to-DC converter has an efficiency of -92%, the DC-to-DC converters an efficiency of -85%, and the DC-DC converters an efficiency of -75%. Therefore it is attempted to use the energy for testing and emulation whenever possible with the highest converter level (change -1- E014.1
    Printed: 15-11-2012 10 2012/50513
    AV-3504 AT current-to-DC converter), which is possible due to the present structure. For many test cases, especially when used as a test and emulation system for batteries, all energy storage units (e.g., the battery cells) are tested for a long time at the same desired size. For example, For example, in a single charge cycle, all five energy storage units can be powered almost the entire CC (constant current) phase from the highest converter stage (AC-to-DC converter). Only at the transition to the CV phase (constant voltage), the module or cell DC-DC converter must intervene. This results in an efficiency advantage of -92-75% = 17% for usually more than 50% of the test time. Therefore, the test-10 arrangement according to the invention allows to work with the best possible efficiency.
    For testing or forming, simply an energy storage unit of the energy storage module is connected to an output of a cell DC-DC converter. Thus, the energy storage unit can be acted upon at the level of the cell-DC-DC converter with a predetermined charging current. 15 When the outputs of a DC-to-DC converter are connected to the series-connected outputs of the associated series-connected DC-DC converters, it is possible to discharge even when using unidirectional DC-DC converters. For this purpose, all energy storage units can be discharged by switching all cell-DC-DC converters inactive. However, individual energy storage units can also be charged with any load current by superimposing the current of the associated module-DC-DC converter through a current of the cell-DC-DC converter.
    Larger energy storage devices can be tested and formed when multiple DC-DC module DC converters are connected in parallel to the output of the AC-DC converter 25 and each DC-DC module is connected to a plurality of parallel-connected DC-DC converters. Thus, any expansion stages and configurations of an energy storage device can be tested and formed, which increases the flexibility of the test arrangement.
    If the outputs of the module-DC-DC converters can be interconnected via switches in series 30, it is also possible to test or formulate energy stores, which consist of several interconnected energy storage modules, as a whole with high efficiency.
    By routing the outputs of the module-to-DC converters through a switch, the test arrangement can also be contacted at the module level, e.g. as input 2/9 -2- 14-11-2012
    Printed: 15-11 -2012 E014.1 10 2012/50513
    AV-3504 AT for a battery management system or to test or formulate individual energy storage modules as a whole.
    If the output of the AC-to-DC converter is routed to the outside via a switch as the output of the test arrangement, the test arrangement can also be contacted at the energy storage level, e.g. as input for a battery management system or to test or formulate individual energy stores as a whole.
    The flexibility of the test arrangement can be further increased if the outputs of several DC / DC converters are connected in series via switches and / or the outputs of the series-connected 2ell-DC-DC converters are guided via an io switch as outputs of the test device to the outside ,
    The subject invention will be explained in more detail below with reference to Figures 1 to 3, which show by way of example, schematically and not by way of limitation advantageous embodiments of the invention. It shows
    1 shows a test arrangement according to the invention and FIGS. 2 and 3 show the use of the test arrangement for testing or forming battery cells.
    The inventive test arrangement 1 for electrical energy storage consists of a bidirectional input-side AC-DC converter 2, which is connected via an input terminal 4 to a power supply 3, e.g. a 400VAC power source, 20 can be connected. At the DC output of the AC to DC converter 2, e.g. a 400VDC output, a number of (at least one) module DC to DC converters 5n ... 5 are connected in parallel. The module-DC-DC converters 5i ... 5 "are designed as commercially available bidirectional, insulated DC-DC converters. The module-to-DC-DC converters 5t ... 5n convert the high-voltage 25 DC output of the AC-to-DC converter 2 into a DC voltage corresponding to the voltage range of an energy storage module, such as a DC power supply. a battery module or a fuel cell module consisting of a plurality of energy storage units, such as e.g. Battery cells or fuel cells, corresponds, e.g. 12V or 48V DC. The outputs of the module-to-DC-DC converters 5: ... 5n can also be switched in series 30 via switch SM, which is possible because the module-DC-DC converters 5, ... 5n are designed as isolated DC-DC converters ,
    At the output of a module-DC-DC converter 5i ... 5 "are connected in parallel a number of (at least one) cell-to-DC-DC converter 6n ... 6nm. The cell-to-dc converters 6n ... 6nm are available as commercially available, insulated 3/9 '3' 14-11-2012 • Printed: 15-11-2012 E014.1
    10 2012/50513 AV-3504 AT
    DC-DC converter designed. The cell-DC-DC converter 6n ... 6nm can also be designed as a bidirectional DC-DC converter. The cell-DC-DC converters ... 6nm convert the DC output of the associated module-DC-DC converter 5i. , , 5n into a DC voltage corresponding to the voltage range of the energy storage unit of an energy storage module, e.g. 0.5V to 5.5V DC for battery cells of a battery module. The outputs of the cell-to-DC converters 6n ... 6nm can also be connected in series via switches SZ, which is possible because the cell-DC-DC converters 6n ... 6nm are designed as isolated DC-DC converters Test arrangement 1 can on energy storage level, the outputs AE +, AE. of the AC-DC converter 2, on energy storage module level, the outputs AM1 +, Ami. AMn +, AMn. the module-to-DC-DC converter 5, ... 5n and the outputs Ai +, Av ... Α ^, Ax. the cell-to-DC-DC converter 6n ... 6nm be led to the outside and can be electrically contacted. Likewise, preferably the first and 15 are the last output AZi +, AZi .... Azx +, AZ *. the series-connectable cell-to-DC constant current transformer 6nm, as shown in Figure 1, led to the outside.
    The outputs AE +, AE. of the AC-DC converter 2 can be activated via switch S1. The outputs AMi +, AMi. ... AMrt +, AMn. the module-DC-DC converters 5i ... 5n can be activated by switch S2. The outputs AZ1 +, AZi .... Az *, 20 Az *, the series-connectable cell-to-DC-DC converters 6im ... 6 "", ie essentially the first and the last output of the series-connected cell DC DC converters ... 6nm, can be activated by switch S3.
    When fully equipped, a test arrangement 1 according to the invention has e.g. an AC-to-DC converter 2, to which eight module-DC-DC converters 51 ... 58ange-25 are connected, to each of which 12 cell-to-DC-DC converters 6n ... 68i2 are connected. Consequently, up to 96 energy storage units or 8 energy storage modules with 12 energy storage units each can be tested or formed. Of course, other expansion stages are conceivable.
    The AC-DC converter 2, the module-DC-DC converter 5τ ... 30 5n and the cell-DC-DC converter 6n ... 6nm are thereby from a control unit 10, which may also be integrated in the test arrangement 1, according to the requirements driven. Likewise, the control unit 10 can control the opening / closing of the switches S1, S2, S3, SM, SZ. The control lines 20 from the control unit 10 to the individual components of the test arrangement 1 are not shown in FIG. 1 for reasons of clarity or merely indicated. 4/9 -4- 14-11-2012 'Printed: 15-11-2012 E014.1 10 2012/50513
    AV-3504 AT
    The function of the test arrangement 1 according to the invention will be described in more detail below with reference to a specific embodiment in the form of a test and Formiersystems for an electrical energy storage.
    In the example according to FIG. 2, the test arrangement 1 according to the invention is connected to a battery pack 7 5 consisting of n battery modules 8,... 8n for each m battery cells 9-n... 9nm in order to test or form the battery pack 7. Each battery cell 9 ^ ... 9nm is connected to the output A1 +, Ai .... Αχ +, A * of a Zeil-DC-DC converter 6n ... 6nm of the test arrangement 1. The battery modules 81 ... 8n are not connected in series here, but each module-DC-DC converter 5 ^. .. 58 is connected to a respective battery module 81 10 ... 8n. For this purpose, the switches S2 are closed and the connection between the module-DC-DC converter 5, ... 58 opened by the switch SM. This allows each battery cell 9-n ... 9nm any (within the voltage and current capacity of the cell-DC-DC converter 6, 1 ... 6nm) load current (charging / discharging) are specified and individual battery cells 9n .. 9nm can be charged or discharged differently. Thus, a battery pack 7, individual battery modules 8 or individual battery cells 9 are tested. Instead of a battery pack or battery modules, other energy storage modules or energy storage cells can be tested. Each battery cell 9 or each battery module 8 can also be connected to a well-known battery management system 11 (BMS). The battery management system 11 can also be connected to the control unit 10 in order to be able to detect and process actual values of the rows or of the modules.
    When using unidirectional DC-to-DC converters 6n ... 6nm can be discharged only on energy storage module level, as described by the module-DC-DC converter 5n in Figure 2. For discharging the battery cells 9n1 ... 25 9nnil connected to the cell DC-DC converter 6ni ... 6nm of the module-DC-DC converter 5 ", the switches SZ and the switches S2, S3 are closed, whereby the outputs of the Cell-to-DC-DC-converters 6ni ... 6nm are connected in series and via the outputs A ^, A ^. are connected to the outputs AMm, Ar * ,, of the module-to-DC-DC converter 5 ". The module DC-DC current transformer 5n now applies a discharge current to the battery cells 9m ... 9nm and the cell-to-DC-DC converters 6ni ... 6nm are switched inactive. Thus, the battery cells 9n-i ... 9nrn are all discharged with the same discharge current. If a single (or more) battery cell 9 "i... 9 ™ is not to be discharged, the discharge current of the module DC-to-DC converter 5n may be controlled by the associated cell dc 35 DC-to-DC converter 6" i ... 6 "m be compensated by this generates a counter charge current, which acts on the battery cells 9n1 ... 9nm. 5/9 -5- 14-11-2012 -Printed: 15-11-2012 E014.1 10 2012/50513
    AV-3504 AT
    By the interaction of cell-to-DC-DC converter 6n ... 6nm and the associated module GleichstronvGleichstromwandler 5n each individual battery cell 9ni ... 9nmmit any load current can be tested or perverted in the above manner. In particular, the current of a module-DC-DC converter 5 5i ... 5n can be superimposed by any current of a cell-DC-DC converter 6ηi ... 6nm, whereby the current of the module-DC-DC converter 5i ... 5n on energy storage unit level can also be strengthened.
    With open switches S1, S2, S3, SZ and SM, at the outputs A1 +, Av ... Ax +, Ax. and Az1 +, Azi .... A7X », Azx- the cell-to-dc converter 6" ... 6nm and the off-10 tap Amu, AMv - AMn +, AMn. the module DC-DC converter 5, ... 5 "only voltages that are below the safety extra-low voltage, which can be completely dispensed with protection against touching. This is particularly interesting when forming Energiespeichem.
    The battery cells 9n... 9nm can also be individually switched on or off via switches SBn... SBnm between the serially connected 15 battery cells 9n. The switches SB "... SB, ™ can also be controlled by the control unit 10.
    When a cell-to-dc-to-dc converter 6nals bidirectional DC-DC converter is designed, it can also be discharged to energy storage unit (battery cell). FIG. 3 shows the use of the test arrangement 1 in a test system with a battery pack 7 (energy storage) consisting of four battery modules... 84 (energy storage modules) of four battery cells 9 connected in series via the switches SBn... ... 944 (energy storage units). The individual battery modules 8t ... 84 are connected in series via switch SM. For this purpose, the switches S1 are closed at the energy storage level and the switches S2 are opened at the energy storage module level. The AC-DC converter 2 is here designed in two stages, with an input-side AC-DC converter 21 and a DC-DC converter 22. 6/9 -6- 14-11-2012 connected thereto
    权利要求:
    Claims (14)
    [1]
    f Printed: 15-11 * 2012 E014.1 10 2012/50513 AV-3504 AI Claims 1. Test arrangement for an energy storage with at least one energy storage module with a plurality of energy storage units, with an AC-DC converter 5 (2) the input side with a voltage supply (3), characterized in that the AC-DC converter (2) is connected on the output side to at least one bidirectional isolated module-DC-DC converter (5, ... 5n), wherein the output of the bidirectional isolated module DC DC-DC converter (5! ... 5n) is connected to a plurality of parallel-connected cell-to-DC-DC converters (6n ... 6nm) and the outputs of the cell-to-DC-DC converters (6u ... 6 ™) as outputs (Au, Α, .... A **. Ax.) of the test arrangement (1) are guided to the outside.
    [2]
    2. Test arrangement according to claim 1, characterized in that a plurality of module-DC-DC converter (5! .. 5n) are connected in parallel to the output of the AC 15 DC-DC converter (2) and each module-DC-DC converter (5i ... 5n) is connected to a plurality of cell-connected DC-DC converters (6n ... 6nm) connected in parallel.
    [3]
    3. Test arrangement according to claim 2, characterized in that the outputs of the module-DC-DC converter (5Ί ... 5n) via switch (SM) are connected in series 20.
    [4]
    4. Test arrangement according to claim 2 or 3, characterized in that the outputs of the module-DC-DC converter (5i .. 5 ") via a switch (S2) as outputs (AMi +, Am% ... AMn +, AMn) of Test arrangement (1) are guided to the outside.
    [5]
    5. Test arrangement according to claim 1, characterized in that the outputs meh-25 rere cell DC-DC converter (6n ... 6nm) via switch (SZ) are connected in series.
    [6]
    6. Test arrangement according to claim 5, characterized in that the outputs of the series-connected cell-DC-DC converter (6-n ... 6nm) via a switch (S3) as outputs (Azi +, AZi .... Αζχ +, Az *.) Of the test assembly (1) is guided to the outside.
    [7]
    7. Test arrangement according to one of claims 1 to 6, characterized in that the outputs of the AC-DC converter (2) via a switch (S1) as outputs (AE +, Ae.) Of the test arrangement (1) are led to the outside. 7/9 -7- 14-11-2012 * Printed: 15-11 -2012 E014.1 10 2012/50513 AV-3504 AT
    [8]
    8. Use of the test arrangement (1) according to one of claims 1 to 7 for testing or forming an energy storage comprising at least one energy storage module with at least one energy storage unit, characterized in that the at least one energy storage unit of the energy storage module with an output (AZi +, 5 A21_. .. Azx +, Αζχ.) Of a cell-Gieichstrom-DC converter <6n ... 6nm) is connected.
    [9]
    9. Use according to claim 8, characterized in that at least two energy storage units of the Energiepelchers are connected in series and each energy storage unit with an output (AMi +, AMi ... AMn +, AMn) of a cell-DC-DC converter (6n ... 6nm ) connected is.
    [10]
    10. Use according to claim 9, characterized in that the two energy storage units via a switch (SB, i ... SBnm) are interconnected.
    [11]
    11. Use according to one of claims 8 to 10, characterized in that at least two energy storage modules are connected in series.
    [12]
    12. Use according to one of claims 8 to 11, characterized in that the 15 outputs (AMi +, AMi- ... AMnt, AMn_) of a module-DC-DC converter (5, ... 5n) with the serially interconnected outputs ( AZi +, AZ1 .... Αζχ +, Az *) of the associated series-connected cell-to-DC converters (6n ... 6nm) are connected.
    [13]
    13. Use according to claim 12, characterized in that the cell-DC-DC converter (6n ... 6nm) are inactive.
    [14]
    14. Use according to claim 12, characterized in that at least one cell-DC-DC converter (6n ... 6nm) generates a load current. 8/9 -8- 14-11-2012
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    引用文献:
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    法律状态:
    优先权:
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    KR1020157013262A| KR101770484B1|2012-11-14|2013-11-11|Testing assembly for an energy store|
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