Voltage dividing plate and simulation battery test system

Abstract

The utility model discloses a voltage dividing plate and a simulation battery test system. The voltage dividing plate comprises a plurality of voltage dividing resistors, a plurality of first connecting pieces and at least one circuit breaking element. The divider resistors are sequentially connected in series. The plurality of first connecting pieces correspond to the plurality of divider resistors, each first connecting piece is connected with one corresponding divider resistor, and the plurality of first connecting pieces are used for outputting analog voltage. At least one breaking element is disposed between the plurality of divider resistors. When the short circuit element is connected to the circuit breaking element, the two adjacent divider resistors of the circuit breaking element are conducted; and when the circuit breaking element is not connected to the short circuit element, the two adjacent divider resistors of the circuit breaking element are disconnected. Therefore, the voltage of different numbers of battery cells can be simulated according to application requirements, and the compatibility of the voltage dividing plate is relatively good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a voltage dividing plate and a simulated battery test system. BACKGROUND

[0002] A battery cluster generally includes a cluster-level battery management system (BMS), a battery module, a high-voltage box, a cluster rack and other materials. In order to test the functions of the cluster-level BMS, a cluster-level BMS single-board test tool simulation system needs to be built. This simulation system needs to use a BMS comprehensive tester, a relay, a test tool and the like to support the function test of the cluster-level BMS. The test tool includes a voltage dividing plate, which is used to divide a large voltage into a plurality of small voltages to simulate a plurality of cell voltages. The current voltage dividing plate can only divide the large voltage into a fixed number of small voltages, and thus can only simulate a fixed number of cell voltages, and has poor compatibility. UTILITARIAN CONTENT

[0003] The present application provides a voltage dividing plate and a simulated battery test system to solve at least one of the above technical problems.

[0004] The voltage dividing plate of the present application comprises:

[0005] A plurality of voltage dividing resistors, which are arranged in series one after another;

[0006] A plurality of first connecting pieces corresponding to the plurality of voltage dividing resistors, each first connecting piece being connected to a corresponding voltage dividing resistor, and the plurality of first connecting pieces being used to output simulated voltages;

[0007] A second connecting piece connected to the voltage dividing resistor at the head of the plurality of voltage dividing resistors, the second connecting piece being used to connect a voltage source;

[0008] At least one open circuit element arranged between the plurality of voltage dividing resistors, when the open circuit element is connected to a short circuit element, the two voltage dividing resistors adjacent to the open circuit element are connected, and when the open circuit element is not connected to the short circuit element, the two voltage dividing resistors adjacent to the open circuit element are disconnected.

[0009] In the voltage dividing plate of the present application, the voltage dividing plate includes at least one open circuit element arranged between the plurality of voltage dividing resistors, and the at least one open circuit element is used for connecting or not connecting a short circuit element, so that different numbers of first connecting pieces output simulated voltages. In this way, different numbers of cell voltages can be simulated according to application requirements, and the compatibility of the voltage dividing plate is good.

[0010] In some embodiments, each of the first connectors is connected to a side of a corresponding one of the voltage dividing resistors that is away from the second connector, the at least one open circuit element includes a first open circuit element and a second open circuit element, the first open circuit element is connected to the voltage dividing resistors closer to the head than the second open circuit element;

[0011] When neither of the first open circuit element and the second open circuit element is connected to the short circuit element, and when the first open circuit element is not connected to the short circuit element and the second open circuit element is connected to the short circuit element, the first connector between the second connector and the first open circuit element outputs an analog voltage;

[0012] When the first open circuit element is connected to the short circuit element and the second open circuit element is not connected to the short circuit element, the first connector between the second connector and the second open circuit element outputs an analog voltage;

[0013] When both of the first open circuit element and the second open circuit element are connected to the short circuit element, all of the first connectors output an analog voltage.

[0014] In the above technical solution, the at least one open circuit element includes a first open circuit element and a second open circuit element, the first open circuit element and the second open circuit element are used for connecting or not connecting the short circuit element, so that three different numbers of first connectors output analog voltages, thereby simulating three different numbers of cell voltages.

[0015] In some embodiments, the plurality of voltage dividing resistors includes a first voltage dividing resistor between the second connector and the first open circuit element and adjacent to the first open circuit element, the first voltage dividing resistor is an Mth voltage dividing resistor of the voltage dividing board; and / or

[0016] The plurality of voltage dividing resistors includes a second voltage dividing resistor between the second connector and the second open circuit element and adjacent to the second open circuit element, the second voltage dividing resistor is an Nth voltage dividing resistor of the voltage dividing board;

[0017] Wherein, 53≤M<65, 65≤N<104, M and N are integers.

[0018] In the technical solution, the first voltage dividing resistor is the Mth voltage dividing resistor of the voltage dividing board, and the second voltage dividing resistor is the Nth voltage dividing resistor of the voltage dividing board. Therefore, when neither the first circuit breaking element nor the second circuit breaking element is connected to the short circuit element, and when the first circuit breaking element is not connected to the short circuit element and the second circuit breaking element is connected to the short circuit element, the first connecting element corresponding to the 1st to (M-1)th voltage dividing resistors of the voltage dividing board can output an analog voltage. When the first circuit breaking element is connected to the short circuit element and the second circuit breaking element is not connected to the short circuit element, the first connecting element corresponding to the 1st to (N-1)th voltage dividing resistors of the voltage dividing board can output an analog voltage. When both the first circuit breaking element and the second circuit breaking element are connected to the short circuit element, the first connecting element corresponding to each voltage dividing resistor of the voltage dividing board can output an analog voltage.

[0019] In some embodiments, the power of each voltage dividing resistor satisfies the condition formula:

[0020] Pr≤P*0.6;

[0021] wherein Pr is the steady-state power of the voltage dividing resistor, and P is the rated power of the voltage dividing resistor.

[0022] In the technical solution, each voltage dividing resistor satisfies the derating principle, so that the safety and reliability of the plurality of voltage dividing resistors can be ensured, and the safety and reliability of the voltage dividing board can be ensured.

[0023] In some embodiments, the resistance value accuracy of each voltage dividing resistor is within ±0.1%.

[0024] Therefore, the resistance value accuracy of each voltage dividing resistor is high, so that the voltage dividing board has high voltage dividing accuracy, and the analog voltage error obtained by each first connecting element is small. When the first connecting element is connected to the BMS voltage sampling board, the voltage error output by the first connecting element to the BMS voltage sampling board is also small, and the requirement of the BMS voltage sampling board on the accuracy of the cell voltage collection can be met.

[0025] The analog battery test system of the embodiments of the present application includes the voltage dividing board of any of the above embodiments.

[0026] In the analog battery test system of the embodiments of the present application, the voltage dividing board has good compatibility and can simulate different numbers of cell voltages. Therefore, the analog battery test system can simulate different cluster-level BMSs for functional testing, and for different cluster-level BMSs, the analog battery test system does not need to be rebuilt, which is beneficial to improve the test efficiency.

[0027] In some embodiments, the number of the voltage dividing boards is a plurality, and the analog battery test system further includes at least one connector configured to connect the plurality of voltage dividing boards.

[0028] In the technical solution, the connector is used to replace manual welding, so that the internal resistance loss of voltage transmission between different voltage dividing plates is reduced, the loss of voltage transmission is greatly reduced, the precision of output analog voltage is improved, the sampling precision requirement of the BMS voltage sampling plate is met, and the connection reliability is good.

[0029] In some embodiments, each of the connectors includes a first sub-connector and a second sub-connector, the first sub-connector and the second sub-connector are respectively arranged on opposite surfaces of two adjacent voltage dividing plates, and the two adjacent voltage dividing plates are connected through the first sub-connector and the second sub-connector.

[0030] In the technical solution, the first sub-connector and the second sub-connector are arranged in pairs, and when the analog battery test system is built, the first sub-connector and the second sub-connector are respectively arranged on opposite surfaces of two adjacent voltage dividing plates, and a plurality of voltage dividing plates are connected through the first sub-connector and the second sub-connector. In this way, the time cost of building the analog battery test system is greatly saved.

[0031] In some embodiments, the connector is a low-impedance connector.

[0032] In the technical solution, the impedance of the low-impedance connector is in the order of mΩ, which can further reduce the loss of voltage transmission and improve the precision of output analog voltage.

[0033] In some embodiments, the analog battery test system further includes a plurality of fixing members, and two adjacent voltage dividing plates are fixed through the fixing members.

[0034] In the technical solution, the connection between the voltage dividing plates is realized through the connector, and the distance between the voltage dividing plates is fixed through the fixing member, so that the consistency of the performance of the plurality of voltage dividing plates is ensured, the risk of connector falling off is reduced, and the stability and reliability of the test work are improved.

[0035] In the voltage dividing plate and the analog battery test system of the embodiments of the present application, the voltage dividing plate includes at least one short-circuit element arranged between a plurality of voltage dividing resistors, and the at least one short-circuit element is used for short-circuit element access or non-access, so that different numbers of first connecting members output analog voltage. In this way, different numbers of cell voltages can be simulated according to application requirements, and the compatibility of the voltage dividing plate is good.

[0036] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort based on the drawings shown. Among them:

[0038] Figure 1 is a circuit principle diagram of a voltage divider plate of some embodiments of the present application;

[0039] Figure 2 is a PCB structure diagram of a voltage divider plate of some embodiments of the present application;

[0040] Figure 3 is a circuit principle diagram of I part in Figure 1

[0041] Figure 4 is a circuit principle diagram of II part in Figure 1

[0042] Figure 5 is a circuit principle diagram of III part in Figure 1

[0043] Figure 6 is a structure diagram of an analog battery test system of some embodiments of the present application;

[0044] Figure 7 is a circuit principle diagram of connection of a first connecting piece on a front surface of a voltage divider plate and a first sub-connector of some embodiments of the present application;

[0045] Figure 8 is a circuit principle diagram of connection of a first connecting piece on a back surface of a voltage divider plate and a second sub-connector of some embodiments of the present application.

[0046] Explanation of reference signs:

[0047] Voltage divider plate 100, voltage dividing resistor 10, first voltage dividing resistor 11, second voltage dividing resistor 12, third voltage dividing resistor 13, fourth voltage dividing resistor 14, fifth voltage dividing resistor 15, sixth voltage dividing resistor 16, first connecting piece 20, circuit breaking element 30, first circuit breaking element 31, second circuit breaking element 32, first interface 33, second interface 34, second connecting piece 40, analog battery test system 200, connector 210, first sub-connector 211, second sub-connector 212, fixing piece 220. DETAILED DESCRIPTION

[0048] ​​​Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are for the purpose of explanation of the present application, and are not to be understood as a limitation of the present application.

[0049] The battery cluster generally includes a cluster-level battery management system (BMS), a battery module, a high-voltage box, a cluster rack, and the like. In order to test the function of the cluster-level BMS, a cluster-level BMS single-board test tool simulation system needs to be built. This simulation system needs to use a BMS comprehensive tester, a relay, a test tool, and the like to support the function test of the cluster-level BMS. Among them, the BMS comprehensive tester, the relay, and the like can be purchased in advance, and the test tool needs to be developed and made according to the system test topology.

[0050] If a simulation system including 8 battery packs is built, each battery pack including 52 battery cells, when the test tool is made, 416 battery cell voltages need to be simulated. In the related art, the test tool includes a voltage dividing plate, a large voltage is divided by the voltage dividing plate to obtain 52 small voltages, each small voltage is transferred to a BMS voltage sampling plate through a welding adapter line; then the voltage dividing plate is used as an adapter plate, the adapter lines are welded between multiple voltage dividing plates to expand the simulation voltage to 8 adapter plates, and then provided to 8 BMS voltage sampling plates, so as to simulate 416 battery cell voltages of 8 battery packs. However, the current voltage dividing plate can only divide a large voltage into a fixed number of small voltages, and thus can only simulate a fixed number of battery cell voltages, and the compatibility is poor.

[0051] Therefore, referring to Figure 1 and Figure 2 , the embodiment of the present application provides a voltage dividing plate 100. The voltage dividing plate 100 includes a plurality of voltage dividing resistors 10, a plurality of first connecting pieces 20, a second connecting piece 40, and at least one open circuit element 30. The plurality of voltage dividing resistors 10 are arranged in series. The plurality of first connecting pieces 20 correspond to the plurality of voltage dividing resistors 10, each first connecting piece 20 is connected to a corresponding voltage dividing resistor 10, and the plurality of first connecting pieces 20 are all used to output a simulation voltage. The second connecting piece 40 is connected to the voltage dividing resistor 10 at the head of the plurality of voltage dividing resistors 10, and the second connecting piece 40 is used to connect a voltage source. The at least one open circuit element 30 is arranged between the plurality of voltage dividing resistors 10. When the open circuit element 30 is connected with a short circuit element, the two voltage dividing resistors 10 adjacent to the open circuit element 30 are connected; when the open circuit element 30 is not connected with a short circuit element, the two voltage dividing resistors 10 adjacent to the open circuit element 30 are disconnected.

[0052] In the voltage divider 100 of this application embodiment, the voltage divider 100 includes at least one circuit breaker element 30 disposed among a plurality of voltage divider resistors 10. The at least one circuit breaker element 30 is used to allow the short-circuit element to be connected or not connected, so that the first connector 20 corresponding to different numbers of voltage divider resistors 10 outputs analog voltage. In this way, different numbers of cell voltages can be simulated according to application requirements, and the voltage divider 100 has good compatibility.

[0053] Specifically, the voltage divider 100 includes a plurality of voltage divider resistors 10. The number of the plurality of voltage divider resistors 10 can be set according to actual needs and is not limited here. The embodiments of this application are described in detail using an example of a voltage divider 100 including 104 voltage divider resistors 10.

[0054] Taking 104 voltage divider resistors as an example, such as Figure 1 As shown, the voltage divider resistors R1, R2, R3, ..., R103 and R104 are connected in series. For ease of reference... Figure 2 The design of a printed circuit board (PCB) can... Figure 1 The circuit is divided into three parts: Part I, Part II, and Part III. In Part I, R1, R2, R3, ..., R34 and R35 are connected in series (e.g., ...). Figure 3 (As shown); In Part II, the voltage divider resistors R36, R37, R38, ..., R70 and R71 are connected in series (as shown). Figure 4 (As shown); In Part III, the voltage divider resistors R72, R73, R74, ..., R103 and R104 are connected in series (as shown). Figure 5 As shown). Based on Figure 1 By constructing the schematic diagram shown, you can obtain... Figure 2 The PCB shown.

[0055] The voltage divider board 100 also includes a plurality of first connectors 20, the number of which is equal to the number of voltage divider resistors 10. Each first connector 20 corresponds to a voltage divider resistor 10, and all first connectors 20 are used to output analog voltage. Each first connector 20 is connected to the side of its corresponding voltage divider resistor 20 closest to the next voltage divider resistor 10. For example, first connector cell_1 is connected to the side of voltage divider resistor R1 closest to voltage divider resistor R2, and first connector cell_2 is connected to the side of voltage divider resistor R2 closest to voltage divider resistor R3. It should be noted that... Figure 1 The first connector cell_35 in section I is also the first connector cell_35 in section II. Figure 1 The first connector cell_71 in Part II is also the first connector cell_71 in Part III.

[0056] The voltage dividing board 100 further comprises a second connecting piece 40 connected to one side of the plurality of voltage dividing resistors 10, and connected to the voltage dividing resistor 10 at the head of the plurality of voltage dividing resistors 10, and located on the same side of the plurality of voltage dividing resistors 10. For example, the voltage dividing resistor 10 at the head is the voltage dividing resistor R1, and the second connecting piece 40 can be connected to the voltage dividing resistor R1, and the remaining plurality of voltage dividing resistors 10 are connected in series on the side away from the second connecting piece 40 of the voltage dividing resistor R1. Each first connecting piece 20 is connected to the side away from the second connecting piece 40 of the corresponding voltage dividing resistor 10.

[0057] The voltage dividing board 100 further comprises at least one circuit breaking element 30 arranged between the plurality of voltage dividing resistors 10. For example, the voltage dividing board 100 further comprises 1, 2, 3 or more circuit breaking elements 30 arranged between the plurality of voltage dividing resistors 10. When the circuit breaking element 30 is connected to the short circuit element, the circuit breaking element 30 is turned on, so that the two voltage dividing resistors 10 adjacent to the circuit breaking element 30 are turned on; when the circuit breaking element 30 is not connected to the short circuit element, the circuit breaking element 30 is turned off, so that the two voltage dividing resistors 10 adjacent to the circuit breaking element 30 are turned off. In the embodiments of the present application, the circuit breaking element 30 can be a short circuit cap base, and the short circuit element is a short circuit cap. Each circuit breaking element 30 can be connected to or not connected to the short circuit element, so that different numbers of voltage dividing resistors 10 correspond to the first connecting piece 20 outputting analog voltage.

[0058] In the embodiments of the present application, when the voltage dividing board 100 divides voltage, the second connecting piece 40 is connected to the voltage source, and any one of the plurality of first connecting pieces 20 is connected to the voltage source, which can be a high voltage source. By dividing voltage through the plurality of voltage dividing resistors 10 in series, the output voltage of one high voltage source can be equally divided into several smaller voltages, and the several small voltages can simulate the cell voltage to support the cluster level BMS to perform function test. When at least one circuit breaking element 30 is connected to or not connected to the short circuit element, different numbers of voltage dividing resistors 10 divide voltage of the high voltage source, so that different numbers of voltage dividing resistors 10 correspond to the first connecting piece 20 outputting analog voltage.

[0059] In the related art, the voltage dividing board comprises a fixed number of voltage dividing resistors, and no circuit breaking element is arranged, so it can only simulate a fixed number of cell voltages, and cannot meet the simulation requirements of more cell voltages.

[0060] In the embodiments of the present application, the voltage dividing board 100 comprises at least one circuit breaking element 30 arranged between the plurality of voltage dividing resistors 10, and the at least one circuit breaking element 30 is used to connect or not connect the short circuit element, so that different numbers of voltage dividing resistors 10 correspond to the first connecting piece 20 outputting analog voltage. In this way, the voltage dividing board 100 has good compatibility, and can simulate different numbers of cell voltages according to application requirements.

[0061] Referring to Figure 1 In some embodiments, each of the circuit breaking elements 30 includes a first interface 33 and a second interface 34. The first interface 33 is connected to an adjacent one of the voltage dividing resistors 10, and the second interface 34 is connected to a corresponding one of the first connectors 20. When the circuit breaking element 30 is connected to a shorting element, the first interface 33 is connected to the second interface 34. When the circuit breaking element 30 is not connected to a shorting element, the first interface 33 is disconnected from the second interface 34.

[0062] In particular, each of the circuit breaking elements 30 includes a first interface 33 and a second interface 34, which can be pins. When the circuit breaking element 30 is connected to a shorting element, the first interface 33 is connected to the second interface 34, so that the circuit breaking element 30 is connected between two adjacent ones of the voltage dividing resistors 10. When the circuit breaking element 30 is not connected to a shorting element, the first interface 33 is disconnected from the second interface 34, so that the circuit breaking element 30 is disconnected between two adjacent ones of the voltage dividing resistors 10.

[0063] The following describes in detail an example in which the voltage dividing board 100 includes two circuit breaking elements 30.

[0064] Referring to Figure 1 In some embodiments, each of the first connectors 20 is connected to a side of a corresponding one of the voltage dividing resistors 10 that is distal from the second connector 40, and at least one of the circuit breaking elements 30 includes a first circuit breaking element 31 and a second circuit breaking element 32. The first circuit breaking element 31 is connected to a voltage dividing resistor 10 that is closer to the head than the second circuit breaking element 32. When neither of the first circuit breaking element 31 and the second circuit breaking element 32 is connected to a shorting element, and when the first circuit breaking element is not connected to a shorting element and the second circuit breaking element is connected to a shorting element, the first connector 20 between the second connector 40 and the first circuit breaking element 31 outputs an analog voltage. When the first circuit breaking element 31 is connected to a shorting element and the second circuit breaking element 32 is not connected to a shorting element, the first connector 20 between the second connector 40 and the second circuit breaking element 32 outputs an analog voltage. When both of the first circuit breaking element 31 and the second circuit breaking element 32 are connected to a shorting element, each of the first connectors 20 outputs an analog voltage.

[0065] Specifically, the at least one cut-off element 30 can be two cut-off elements 30, namely a first cut-off element 31 and a second cut-off element 32. The first cut-off element 31 and the second cut-off element 32 are arranged between the plurality of voltage division resistors 10 in series, the first cut-off element 31 is closer to the voltage division resistor 10 at the head than the second cut-off element 32 in the connection relationship, and the second cut-off element 32 is closer to the voltage division resistor 10 at the tail than the first cut-off element 31 in the connection relationship, that is, the first cut-off element 31 is closer to the second connecting piece 40 than the second cut-off element 32 in the connection relationship. Taking 104 voltage division resistors 10 as an example, as shown in FIG. 1, the voltage division resistor 10 at the head is the voltage division resistor R1, and the voltage division resistor 10 at the tail is the voltage division resistor R104. Figure 1

[0066] The first cut-off element 31 and the second cut-off element 32 have four different short-circuit element access modes in common, so that the voltage division board 100 can simulate three different numbers of cell voltages.

[0067] The first mode: neither the first cut-off element 31 nor the second cut-off element 32 is connected to the short-circuit element, the first cut-off element 31 is disconnected between the two adjacent voltage division resistors 10, and the second cut-off element 32 is disconnected between the two adjacent voltage division resistors 10. At this time, the high-voltage source is connected to the second connecting piece 40, and one first connecting piece 20 between the second connecting piece 40 and the first cut-off element 31 close to the first cut-off element 31, and the first connecting piece 20 corresponding to the plurality of voltage division resistors 10 between the second connecting piece 40 and the first cut-off element 31 outputs the simulated voltage.

[0068] The second mode: the first cut-off element 31 is connected to the short-circuit element, and the second cut-off element 32 is not connected to the short-circuit element, the first cut-off element 31 is connected between the two adjacent voltage division resistors 10, and the second cut-off element 32 is disconnected between the two adjacent voltage division resistors 10. At this time, the high-voltage source is connected to the second connecting piece 40, and one first connecting piece 20 between the second connecting piece 40 and the second cut-off element 32 close to the second cut-off element 32, and the first connecting piece 20 corresponding to the voltage division resistor 10 between the second connecting piece 40 and the second cut-off element 32 outputs the simulated voltage.

[0069] The third mode: the first cut-off element 31 and the second cut-off element 32 are both connected to the short-circuit element, the first cut-off element 31 is connected between the two adjacent voltage division resistors 10, and the second cut-off element 32 is connected between the two adjacent voltage division resistors 10. At this time, the high-voltage source is connected to the second connecting piece 40, and one first connecting piece 20 corresponding to the last voltage division resistor 10 in series, and the plurality of first connecting pieces 20 all output the simulated voltage.

[0070] ​For the above three modes, the number of cell voltages simulated by the first mode is less than the number of cell voltages simulated by the second mode, and the number of cell voltages simulated by the second mode is less than the number of cell voltages simulated by the third mode.

[0071] It can be understood that for the fourth mode, when the first circuit breaking element 31 is not connected with the short circuit element and the second circuit breaking element 32 is connected with the short circuit element, the two voltage dividing resistors 10 adjacent to the first circuit breaking element 31 are disconnected, which is equivalent to the first case.

[0072] In the related art, the voltage dividing board includes 52 fixed voltage dividing resistors, and no circuit breaking element is arranged, so that only 52 cell voltages can be simulated, and 64 or 104 cell voltages cannot be simulated.

[0073] In the embodiments of the present application, the first circuit breaking element 31 and the second circuit breaking element 32 have three different short circuit element connection modes, so that the voltage dividing board 100 can simulate three different numbers of cell voltages, for example, 52, 64, and 104 cell voltages can be simulated respectively, more application requirements can be met, and good compatibility is achieved.

[0074] Please refer to Figure 1 and Figure 4 In some embodiments, the plurality of voltage dividing resistors 10 includes a first voltage dividing resistor 11 adjacent to the first circuit breaking element 31 between the second connecting piece 40 and the first circuit breaking element 31, the plurality of first connecting pieces 20 includes a first connecting piece 20 corresponding to the first voltage dividing resistor 11, the first interface 33 of the first circuit breaking element 31 is connected with the first voltage dividing resistor 11, and the second interface 34 is connected with the first connecting piece 20 corresponding to the first voltage dividing resistor 11; and / or the plurality of voltage dividing resistors 10 includes a second voltage dividing resistor 12 adjacent to the second circuit breaking element 32 between the second connecting piece 40 and the second circuit breaking element 32, the plurality of first connecting pieces 20 includes a first connecting piece 20 corresponding to the second voltage dividing resistor 12, the first interface 33 of the second circuit breaking element 32 is connected with the second voltage dividing resistor 12, and the second interface 34 is connected with the first connecting piece 20 corresponding to the second voltage dividing resistor 12.

[0075] Specifically, the plurality of voltage dividing resistors 10 further includes a third voltage dividing resistor 13 adjacent to the first circuit breaking element 31 at the second end 40. The first voltage dividing resistor 11 and the third voltage dividing resistor 13 are two voltage dividing resistors 10 adjacent to the first circuit breaking element 31. When the first circuit breaking element 31 is connected with the short circuit element, a conduction is formed between the first voltage dividing resistor 11 and the third voltage dividing resistor 13. When the first circuit breaking element 31 is not connected with the short circuit element, a disconnection is formed between the first voltage dividing resistor 11 and the third voltage dividing resistor 13.

[0076] The plurality of voltage division resistors 10 further comprises a fourth voltage division resistor 14 adjacent to the second break element 32 at the second end 40. The second voltage division resistor 12 and the fourth voltage division resistor 14 are two voltage division resistors 10 adjacent to the second break element 32. When the second break element 32 is connected with a short element, the second voltage division resistor 12 and the fourth voltage division resistor 14 are connected. When the second break element 32 is not connected with a short element, the second voltage division resistor 12 and the fourth voltage division resistor 14 are disconnected.

[0077] Referring to Figure 1 and Figure 4 In some embodiments, the first voltage division resistor 11 is the Mth voltage division resistor 10 of the voltage division board 100; and / or the second voltage division resistor 12 is the Nth voltage division resistor 10 of the voltage division board 100, wherein 53≤M<65, 65≤N<104, and M and N are integers.

[0078] Specifically, when the first voltage division resistor 11 is the Mth voltage division resistor 10 of the voltage division board 100, the third voltage division resistor 13 is the (M+1)th voltage division resistor 10 of the voltage division board 100. The plurality of voltage division resistors 10 further comprises a fifth voltage division resistor 15 adjacent to the first voltage division resistor 11 and close to the second connecting piece 40. The fifth voltage division resistor 15 is the (M-1)th voltage division resistor 10 of the voltage division board 100.

[0079] When the second voltage division resistor 12 is the Nth voltage division resistor 10 of the voltage division board 100, the fourth voltage division resistor 14 is the (N+1)th voltage division resistor 10 of the voltage division board 100. The plurality of voltage division resistors 10 further comprises a sixth voltage division resistor 16 adjacent to the second voltage division resistor 12 and close to the second connecting piece 40. The sixth voltage division resistor 16 is the (N-1)th voltage division resistor 10 of the voltage division board 100.

[0080] For example, when M=53, as shown in Figure 4 , the first voltage division resistor 11 is the voltage division resistor R53, and the third voltage division resistor 13 is the voltage division resistor R54. The first break element 31 is arranged between the voltage division resistor R53 and the first connecting piece cell_53. When the first break element 31 is connected with a short element, the voltage division resistor R53 and the voltage division resistor R54 are connected. When the first break element 31 is not connected with a short element, the voltage division resistor R53 and the voltage division resistor R54 are disconnected.

[0081] For example, when N=65, as shown in Figure 4As shown, the second voltage dividing resistor 12 is voltage dividing resistor R65, and the fourth voltage dividing resistor 14 is voltage dividing resistor R66. The second circuit breaking element 32 is arranged between the voltage dividing resistor R65 and the voltage dividing resistor R66. When the first circuit breaking element 31 is connected with the short circuit element, the voltage dividing resistor R65 and the voltage dividing resistor R66 are connected. When the first circuit breaking element 31 is not connected with the short circuit element, the voltage dividing resistor R65 and the voltage dividing resistor R66 are disconnected.

[0082] In combination with the three different connection modes of the first circuit breaking element 31 and the second circuit breaking element 32, when neither of the first circuit breaking element 31 and the second circuit breaking element 32 is connected with the short circuit element, the voltage dividing resistor R53 and the voltage dividing resistor R54 are disconnected, and the voltage dividing resistor R65 and the voltage dividing resistor R66 are disconnected. At this time, the high voltage source is connected to the second connecting element 40 and the first connecting element cell_52, so that the first connecting elements cell_1-cell_52 corresponding to the plurality of voltage dividing resistors R1-R52 between the second connecting element 40 and the first circuit breaking element 31 can output analog voltage. That is, the first connecting elements 20 corresponding to the first to (M-1)th voltage dividing resistors 10 of the voltage dividing board 100 can output analog voltage.

[0083] When the first circuit breaking element 31 is connected with the short circuit element and the second circuit breaking element 32 is not connected with the short circuit element, the voltage dividing resistor R53 and the voltage dividing resistor R54 are connected, and the voltage dividing resistor R65 and the voltage dividing resistor R66 are disconnected. At this time, the high voltage source is connected to the second connecting element 40 and the first connecting element cell_64, so that the first connecting elements cell_1-cell_64 corresponding to the plurality of voltage dividing resistors R1-R64 between the second connecting element 40 and the first circuit breaking element 31 output analog voltage. That is, the first connecting elements 20 corresponding to the first to (N-1)th voltage dividing resistors 10 of the voltage dividing board 100 can output analog voltage.

[0084] When the first circuit breaking element 31 and the second circuit breaking element 32 are both connected with the short circuit element, the voltage dividing resistor R53 and the voltage dividing resistor R54 are connected, and the voltage dividing resistor R65 and the voltage dividing resistor R66 are connected. The high voltage source is connected to the second connecting element 40 and the first connecting element cell_104, so that the first connecting elements cell_1-cell_104 corresponding to the plurality of voltage dividing resistors R1-R104 output analog voltage. That is, the first connecting elements 20 corresponding to the plurality of voltage dividing resistors 10 of the voltage dividing board 100 can all output analog voltage.

[0085] Please refer to Figure 1 In some embodiments, the power of each voltage dividing resistor 10 satisfies the condition formula:

[0086] Pr≤P*0.6;

[0087] Wherein, Pr is the steady-state power of the voltage dividing resistor 10, and P is the rated power of the voltage dividing resistor 10.

[0088] Specifically, the voltage dividing resistor 10 can be a thick film resistor, which refers to a resistor made by a thick film process on a carrier. The thick film resistor has good heat resistance, high stability and a wide range of resistance values, and the resistance value of the thick film resistor is stable and accurate. Using the thick film resistor as the voltage dividing resistor 10 needs to meet the derating principle of the thick film resistor: Pr≤P*0.6, so as to ensure the reliability of the voltage dividing resistor 10, and further ensure the reliability of the voltage dividing plate 100. Taking the voltage dividing resistor 10 with a resistance value of 500Ω and a rated power of 0.125W as an example, P*0.6=0.125W*0.6=0.075W.

[0089] In some examples, the range of the battery cell voltage simulated by each voltage dividing resistor 10 is 1.5V-5V, and according to the power calculation formula of the resistor Pr=U 2 / R, the power loaded on each voltage dividing resistor 10 is Pr=5 2 / 500=0.05W≤0.075W, so it can be considered that the use of the voltage dividing resistor 10 is reliable.

[0090] Please refer to Figure 1 In some embodiments, the resistance value accuracy of each voltage dividing resistor 10 is within ±0.1%.

[0091] Specifically, taking the example that the first and second circuit breaking elements 31 and 32 are both connected with the short circuit element, at this time, the voltage dividing plate 100 simulates 104 battery cell voltages. In an ideal state, if the total voltage output by the high voltage source is 333V, the voltage across each voltage dividing resistor 10 is 333 / 104=3.2019V. In actual application, the resistance value of the voltage dividing resistor 10 can deviate, and the resistance value accuracy of each voltage dividing resistor 10 is within ±0.1%, which can be divided into the following two cases.

[0092] Deviation case one: the resistance value accuracy of one of the 104 voltage dividing resistors 10 is 0.1% lower, and the resistance value accuracy of the remaining 103 resistors is 0.1% higher. The voltage dividing value of the lower voltage dividing resistor 10 is calculated as:

[0093] (1-0.1%) / [(1-0.1%)+(1+0.1%)*103]*333V=3.1955V

[0094] The error of this voltage dividing resistor 10 is only 3.2019V-3.1955V=6.4mV.

[0095] Case two: the resistance value of one of the 104 voltage dividing resistors 10 is 0.1% higher than the standard, and the resistance values of the other 103 voltage dividing resistors 10 are 0.1% lower than the standard. The voltage value of the voltage dividing resistor 10 with the higher resistance value is calculated as follows:

[0096] (1+0.1%) / [(1+0.1%) + (1-0.1%) * 103] * 333V = 3.2082V

[0097] The error of the voltage dividing resistor 10 is only 3.2082V-3.2019V = 6.3mV.

[0098] The above is the error of the voltage dividing resistor 10 under the limit deviation state. The thick film resistor process maturity of 0.1% precision is relatively high. It is found through research that, by comparing the theoretical value with the measured value of a five-and-a-half digit multimeter, the voltage precision (tested at five voltage points defined by the national standard) of the output of a single voltage dividing board 100 is less than 1mV. The measured precision is greatly improved compared with related technologies. In this way, the voltage dividing board 100 has high voltage dividing precision and small voltage error, and can meet the requirements of the BMS voltage sampling board on the voltage collection precision of the battery cell.

[0099] Referring to Figure 1 and Figure 6 , the application also provides a simulated battery test system 200. The simulated battery test system 200 comprises the voltage dividing board 100 of any of the above embodiments.

[0100] Specifically, the simulated battery test system 200 comprises the voltage dividing board 100. In some examples, the simulated battery test system 200 further comprises a BMS comprehensive tester, a relay and a BMS voltage sampling board, and the voltage dividing board 100 is connected to the BMS voltage sampling board, so that the simulated battery test system 200 can simulate a cluster-level BMS system to perform a function test.

[0101] The simulated battery test system 200 of the application comprises the voltage dividing board 100 described above, and the voltage dividing board 100 has good compatibility and can simulate voltages of different numbers of battery cells. In this way, the simulated battery test system 200 can simulate different cluster-level BMSs to perform a function test, and for different cluster-level BMSs, the simulated battery test system 200 does not need to be re-built, which is beneficial to improve the test efficiency.

[0102] Referring to Figure 1 , Figure 2 , Figures 6 to 8 In some embodiments, the number of voltage dividing boards 100 is a plurality, and the simulated battery test system 200 further comprises at least one connector 210, and the at least one connector 210 is used to connect the plurality of voltage dividing boards 100.

[0103] Specifically, the number of the voltage division boards 100 is multiple, which can be determined according to the test requirements of the cluster-level BMS. In one example, the analog battery test system 200 can include 8 voltage division boards 100. The analog battery test system 200 further includes at least one connector 210, and each two voltage division boards 100 can be connected through the at least one connector 210. The voltage switching between the multiple voltage division boards 100 can be realized through the connector 210, and the multiple voltage division boards 100 connected together form the test tooling of the analog battery test system 200.

[0104] As shown in Figure 7 and Figure 8 , each voltage division board 100 includes 104 voltage division resistors 10. When the first and second circuit breaking elements 31 and 32 are both connected to the short circuit element, each two voltage division boards 100 need to be connected through 3 connectors 210. The connector 210 is connected to one end of the multiple first connecting elements 20, and the other end of the multiple first connecting elements 20 is respectively connected to the multiple voltage division resistors 10. Among them, in the adjacent two voltage division boards 100, the second connecting element 40 and the first connecting elements cell_1-cell_35 are connected through the first connector 210, the first connecting elements cell_36-cell_71 are connected through the second connector 210, and the first connecting elements cell_72-cell_104 are connected through the third connector 210. Taking the number of voltage division boards 100 as 8 for example, 8 voltage division boards 100 are connected through 7 groups of connectors 210, each group including 3 connectors 210, and a total of 21 connectors 210.

[0105] Figure 7 U1, U3, and U5 in Figure 2 are positions on the front surface of the voltage division board 100 for surface mounting the connector 210, Figure 7 corresponding to the PCB, Figure 2 U1, U3, and U5 in Figure 7 correspond to U1, U3, and U5 in Figure 8 . U2, U4, and U6 in

[0106] It should be noted that after the 8 voltage dividing plates 100 are connected by the connector 210, the 8 voltage dividing plates 100 are equivalent to being connected in parallel. If each voltage dividing plate 100 simulates 52 battery cells, the second connecting piece 40 of the first voltage dividing plate 100 and the first connecting piece cell_52 of the eighth voltage dividing plate 100 are respectively connected to a high-voltage source, so that the 8 voltage dividing plates 100 can simulate 416 battery cell voltages. If each voltage dividing plate 100 simulates 64 battery cell voltages, the second connecting piece 40 of the first voltage dividing plate 100 and the first connecting piece cell_64 of the eighth voltage dividing plate 100 are respectively connected to a high-voltage source, so that 512 battery cell voltages can be simulated. If each voltage dividing plate 100 simulates 104 battery cell voltages, the second connecting piece 40 of the first voltage dividing plate 100 and the first connecting piece cell_104 of the eighth voltage dividing plate 100 are respectively connected to a high-voltage source, so that the 8 voltage dividing plates 100 can simulate 832 battery cell voltages.

[0107] In the related art, the switching between the plurality of voltage dividing plates relies on manual welding of switching wires. The impedance of the welding points is large, the internal resistance loss of voltage transmission is serious, the voltage drop is obvious, the voltage error of the voltage dividing plate output to the BMS voltage sampling plate is large, the error is greater than 10 mV, which is much larger than the sampling accuracy requirement of the BMS voltage sampling plate. In addition, the distance between the welding points is small, and the welding points are prone to short circuit, open circuit, and wire harness pulling and twisting, and the reliability of the connection is poor.

[0108] In the embodiments of the present application, the connector 210 is used instead of manual welding, the internal resistance loss of voltage transmission is reduced, the loss of voltage transmission is greatly reduced, the accuracy of the output analog voltage is improved, the sampling accuracy requirement of the BMS voltage sampling plate is met, and the reliability of the connection is good.

[0109] Please refer to Figure 1 , Figure 2 , Figures 6 to 8 In some embodiments, each connector 210 includes a first sub-connector 211 and a second sub-connector 212. The first sub-connector 211 and the second sub-connector 212 are respectively arranged on opposite sides of two adjacent voltage dividing plates 100. The two adjacent voltage dividing plates 100 are connected by the first sub-connector 211 and the second sub-connector 212.

[0110] Specifically, each connector 210 includes a first sub-connector 211 and a second sub-connector 212, and the first sub-connector 211 and the second sub-connector 212 are male and female matched. For example, the first sub-connector 211 is a female connector, and the second sub-connector 212 is a male connector, or the first sub-connector 211 is a male connector, and the second sub-connector 212 is a female connector.

[0111] The first sub-connector 211 and the second sub-connector 212 can be respectively fixed on the opposite sides of the adjacent two voltage dividing plates 100 by surface mounting. For example, the first sub-connector 211 is arranged on the back of the first voltage dividing plate 100 and is fixed on the back by surface mounting Figure 8 U2, U4, U6 in FIG. 2, and at this time, the second sub-connector 212 is arranged on the front of the second voltage dividing plate 100 and is fixed on the front by surface mounting Figure 2 U1, U3, U5 in FIG. 2, or the second sub-connector 212 is arranged on the back of the voltage dividing plate 100 and is fixed on the back by surface mounting Figure 7 U2, U4, U6 in FIG. 2, and at this time, the first sub-connector 211 is arranged on the front of the voltage dividing plate 100 and is fixed on the front by surface mounting Figure 8 U1, U3, U5 in FIG. 2, or in other embodiments, the opposite sides of the adjacent two voltage dividing plates 100 can be provided with sockets connected with the plurality of first connecting pieces 20, and the first sub-connector 211 and the second sub-connector 212 can be directly connected with the sockets to be fixed on the voltage dividing plate 100. Figure 2 Figure 7 When the plurality of voltage dividing plates 100 are connected, the plurality of voltage dividing plates 100 are arranged in parallel and opposite to each other, the back of the first voltage dividing plate 100 is opposite to the front of the second voltage dividing plate 100, and so on. The adjacent two voltage dividing plates 100 are connected by the first sub-connector 211 and the second sub-connector 212. For the case of two voltage dividing plates 100, the front of the first voltage dividing plate 100 does not need to be provided with the connector 210, the back of the first voltage dividing plate 100 is provided with the first sub-connector 211, the front of the second voltage dividing plate 100 is provided with the second sub-connector 212, and the first sub-connector 211 is connected with the second sub-connector 212, so that the first voltage dividing plate 100 is connected with the second voltage dividing plate 100.

[0112] When the number of voltage dividing plates 100 is greater than two, as shown in FIG. 3, the back of the second voltage dividing plate 100 is provided with the first sub-connector 211, the front of the third voltage dividing plate 100 is provided with the second sub-connector 212, the first sub-connector 211 is connected with the second sub-connector 212, so that the second voltage dividing plate 100 is connected with the third voltage dividing plate 100, and so on, to realize the connection between the plurality of voltage dividing plates 100, and the back of the last voltage dividing plate 100 does not need to be provided with the connector 210.

[0113] In the related art, the total time for manually welding the adapter wire to build a test tool including four voltage dividing plates is about 8-10 hours. Figure 6

[0114]

[0115] ​​​In the embodiments of the present application, the first sub-connector 211 and the second sub-connector 212 are male and female matched, and when the test tool is built, the first sub-connector 211 and the second sub-connector 212 are respectively inserted into two sides opposite to each other of the voltage divider plate 100, and the corresponding connection between the plurality of voltage divider plates 100 can be achieved. The total time for building the test tool including four voltage divider plates 100 is only 1-2 hours. In this way, the time cost for building the simulated battery test system 200 is greatly saved.

[0116] Referring to Figure 6 In some embodiments, the connector 210 is a low-impedance connector.

[0117] Specifically, the impedance of the low-impedance connector is in the order of mΩ. The low-impedance connector can further reduce the loss of voltage transmission and improve the accuracy of the output simulated voltage.

[0118] Referring to Figure 6 In some embodiments, the simulated battery test system 200 further includes a plurality of fixing members 220, and the two adjacent voltage divider plates 100 are fixed by the fixing members 220.

[0119] Specifically, the fixing member 220 can be any element having a connecting function. In one example, the fixing member 220 is a bolt, which includes two ends opposite to each other along the length direction, one end of which is formed with a protruding part, the diameter of the protruding part is smaller than the diameter of the bolt, the protruding part is provided with a thread, and the other end is recessed along the length direction towards the protruding part to form a connecting hole.

[0120] The two voltage divider plates 100 are fixed and connected by at least one fixing member 220. For example, each voltage divider plate 100 is provided with a circular hole at four corners, such as Figure 2 positions A, B, C and D, and the four circular holes are respectively used for penetrating the protruding parts of the corresponding four bolts. The protruding part of the bolt can be located on the front surface of the voltage divider plate 100, and the connecting hole is located on the back surface of the voltage divider plate 100. The connecting hole of the bolt of the first voltage divider plate 100 can be matched with the protruding part of the bolt of the second voltage divider plate 100, the connecting hole of the bolt of the second voltage divider plate 100 can be matched with the protruding part of the bolt of the third voltage divider plate 100, and so on. That is, the two voltage divider plates 100 are fixed and connected by four bolts, so as to realize the fixed connection between the plurality of voltage divider plates 100. In other examples, the two voltage divider plates 100 can also be fixed and connected by more bolts, for example, the two voltage divider plates 100 can be fixed and connected by 8 or 12 bolts, which is not limited herein.

[0121] In the related art, due to different test item conditions in the test process of the analog battery test system, the test tool often needs to be moved in cooperation with different test equipment, and the manually welded connecting line often falls off or causes short circuit with other welding points during the movement, which causes great inconvenience to the test.

[0122] In the embodiments of the present application, the connection between the dividing plates 100 is realized through the connectors 210, and the distance between the dividing plates 100 is fixed through the fixing members 220. It is found through research that the connectors 210 do not loosen during the movement of the test tool and when the test tool falls from a 1m high table. In this way, the setting of the fixing members 220 ensures the consistency of the performance of the test tool and improves the stability and reliability of the test work.

[0123] In summary, in the dividing plate 100 and the analog battery test system 200 of the embodiments of the present application, the dividing plate 100 includes at least one open circuit element 30 arranged between the plurality of dividing resistors 10, and the at least one open circuit element 30 is used for the short circuit element to be accessed or not accessed, so that the first connecting member 20 outputs the analog voltage corresponding to different numbers of dividing resistors 10. In this way, different numbers of cell voltages can be simulated according to application requirements, and the compatibility of the dividing plate 100 is good.

[0124] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0125] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0126] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0127] The above disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of the application, the components and arrangements of specific examples are described in the above. Of course, they are only examples, and the purpose is not to limit the application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0128] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "embodiment", "example", "specific example", "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0129] While the embodiments of the present application have been shown and described above, it will be apparent to those having ordinary skill in the art that a number of changes, modifications, alternatives, and variations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A voltage dividing board, characterized by, include: Multiple voltage divider resistors are connected in series. A plurality of first connectors corresponding to the plurality of voltage divider resistors, each first connector being connected to a corresponding voltage divider resistor, and the plurality of first connectors being used to output analog voltage; A second connector is connected to the first voltage divider resistor among the plurality of voltage divider resistors, the second connector being used to connect to a voltage source; At least one circuit breaker element is disposed among the plurality of voltage divider resistors. When the circuit breaker element is connected to a short-circuit element, the two adjacent voltage divider resistors of the circuit breaker element are connected; when the circuit breaker element is not connected to the short-circuit element, the two adjacent voltage divider resistors of the circuit breaker element are disconnected.

2. The voltage divider board of claim 1, wherein, Each of the first connectors is connected to the side of the voltage divider resistor that is away from the second connector, and the at least one circuit breaker element includes a first circuit breaker element and a second circuit breaker element, wherein the first circuit breaker element is closer to the voltage divider resistor at the head than the second circuit breaker element. When neither the first circuit breaker nor the second circuit breaker is connected to the short-circuit element, and when the first circuit breaker is not connected to the short-circuit element but the second circuit breaker is connected to the short-circuit element, the first connection between the second connection and the first circuit breaker outputs an analog voltage. When the first circuit breaker element is connected to the short-circuit element and the second circuit breaker element is not connected to the short-circuit element, the first connection between the second connection element and the second circuit breaker element outputs an analog voltage. When both the first circuit breaker element and the second circuit breaker element are connected to the short-circuit element, the plurality of first connectors all output analog voltage.

3. The voltage divider board of claim 2, wherein, The plurality of voltage divider resistors includes a first voltage divider resistor between the second connector and the first circuit breaker element, adjacent to the first circuit breaker element, wherein the first voltage divider resistor is the Mth voltage divider resistor of the voltage divider plate; and / or The plurality of voltage divider resistors include a second voltage divider resistor between the second connector and the second circuit breaker element, and adjacent to the second circuit breaker element, wherein the second voltage divider resistor is the Nth voltage divider resistor of the voltage divider plate; Where 53≤M<65, 65≤N<104, and M and N are both integers.

4. The voltage divider of claim 1, wherein, The power of each of the voltage divider resistors satisfies the following condition: Pr≤P*0.6; Wherein, Pr is the steady-state power of the voltage divider resistor, and P is the rated power of the voltage divider resistor.

5. The voltage divider of claim 1, wherein, The resistance accuracy of each of the voltage divider resistors is within ±0.1%.

6. An analog battery test system, characterized by, Includes the pressure plate according to any one of claims 1-5.

7. The simulated battery test system of claim 6, wherein, The number of voltage divider plates is multiple, and the simulated battery testing system also includes at least one connector for connecting multiple voltage divider plates.

8. The simulated battery test system of claim 7, wherein, Each connector includes a first sub-connector and a second sub-connector, which are respectively disposed on opposite sides of two adjacent pressure plates, and the two adjacent pressure plates are connected by the first sub-connector and the second sub-connector.

9. The simulated battery test system of claim 7, wherein, The connector is a low-impedance connector.

10. The simulated battery test system of claim 7, wherein, The analog battery test system further comprises a plurality of fixing members, and two adjacent voltage division plates are fixed through the fixing members.

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