Battery management system test tool

Abstract

The utility model relates to a battery management system test tool. The battery management system test tool comprises a shell, a power input interface and a circuit board assembly, the shell comprises a top plate and a bottom plate. The power input interface is arranged on the top plate. The power input interface comprises a grounding interface and a power anode interface. The circuit board assembly is arranged between the top plate and the bottom plate. The circuit board assembly comprises a first circuit board, a second circuit board and a simulation single cell voltage output interface. The first circuit board is located on one side of the second circuit board facing the top plate. The first circuit board is electrically connected with the second circuit board. The power input interface is electrically connected with the first circuit board. And the analog single cell voltage output interface is electrically connected with the second circuit board. According to the battery management system test tool provided by the embodiment of the invention, the size of the battery management system test tool can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of test equipment, and particularly to a test tool for a battery management system. Background Art

[0002] With the popularization of new energy vehicles, the battery management system (BMS) is an important part of the vehicle power system. To ensure the reliability of the operation of the battery management system, corresponding tests need to be carried out on the battery management system. In the related art, a test tool for the battery management system is used to perform corresponding tests on the battery management system. However, the test tool for the battery management system is large in volume, not convenient to move, and has poor flexibility in use. Utility Model Content

[0003] The embodiment of this application provides a test tool for a battery management system, which is beneficial to reducing the volume of the test tool itself for the battery management system.

[0004] The embodiment of this application proposes a test tool for a battery management system, which includes a housing, a power input interface, and a circuit board assembly.

[0005] The housing includes a top plate and a bottom plate. The power input interface is arranged on the top plate. The power input interface includes a ground interface and a power positive interface. The circuit board assembly is arranged between the top plate and the bottom plate. The circuit board assembly includes a first circuit board, a second circuit board, and an analog single cell voltage output interface. The first circuit board is located on the side of the second circuit board facing the top plate. The first circuit board and the second circuit board are electrically connected. The power input interface is electrically connected to the first circuit board. The analog single cell voltage output interface is electrically connected to the second circuit board.

[0006] The test tool for the battery management system in the embodiment of this application includes a power input interface and a circuit board assembly. The test tool for the battery management system can be electrically connected to an external power supply through the power input interface to use the external power supply to supply power to the test tool for the battery management system to simulate the voltage input by a single cell. After the voltage value input by the power input interface is processed by the circuit board assembly, the circuit board assembly outputs an analog single cell voltage value through the analog single cell voltage output interface. The battery management system to be tested can sample the analog single cell voltage value, so as to detect the single cell voltage sampling function of the battery management system. The test tool for the battery management system in the embodiment of this application does not need to use actual mass-produced battery cells, and at the same time, the structure layout of the circuit board assembly itself is compact and occupies little space, so it is beneficial to reduce the volume of the test tool itself for the battery management system, making the test tool for the battery management system convenient to move and having good flexibility in use.

[0007] In some realizable ways, the power input interface includes more than two power positive interfaces.

[0008] In some realizable ways, the battery management system test tooling further includes a voltage dividing circuit. The power input interface is electrically connected to the voltage dividing circuit. The voltage dividing circuit includes more than two voltage dividing resistors, and each voltage dividing resistor is electrically connected to the analog single-cell voltage output interface.

[0009] In some realizable ways, the circuit board assembly is detachably connected to the top plate.

[0010] In some realizable ways, the battery management system test tooling further includes a temperature test module. The temperature test module includes a test resistor and an analog temperature sampling interface. The test resistor and the analog temperature sampling interface are both disposed on the second circuit board and are electrically connected.

[0011] In some realizable ways, the temperature test module includes at least two test resistor groups. Each test resistor in each test resistor group has the same resistance value, and in any two test resistor groups, the resistance value of the test resistors in one group is different from that of the test resistors in the other group.

[0012] In some realizable ways, the battery management system test tooling further includes a switching switch. The switching switch is disposed on the top plate and is used to control any one of all the test resistor groups to be electrically connected to the analog temperature sampling interface.

[0013] In some realizable ways, both the analog single-cell voltage output interface and the analog temperature sampling interface are disposed on the surface of the second circuit board facing the first circuit board.

[0014] In some realizable ways, the second circuit board is rectangular, and both the analog single-cell voltage output interface and the analog temperature sampling interface are disposed on the same board edge of the second circuit board.

[0015] In some realizable ways, the housing includes side plates. The side plates include openings. Both the analog single-cell voltage output interface and the analog temperature sampling interface are disposed corresponding to the openings. The side plates include ventilation holes. The battery management system test tooling further includes a fan. The fan is connected to the side plate and is disposed corresponding to the ventilation holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0017] Figure 1 is a schematic structural diagram of a battery management system test tooling according to an embodiment of the present application;

[0018] Figure 2It is a partial exploded structural schematic diagram of a battery management system test tooling according to an embodiment of the present application;

[0019] Figure 3 It is a partial structural schematic diagram of a battery management system test tooling according to an embodiment of the present application;

[0020] Figure 4 It is a partial circuit schematic diagram of a battery management system test tooling according to an embodiment of the present application;

[0021] Figure 5 It is a partial structural schematic diagram of a battery management system test tooling according to an embodiment of the present application;

[0022] Figure 6 It is a partial circuit schematic diagram of a battery management system test tooling according to an embodiment of the present application;

[0023] Figure 7 It is a partial structural schematic diagram of a battery management system test tooling according to an embodiment of the present application;

[0024] Figure 8 It is a structural schematic diagram of a battery management system test tooling according to an embodiment of the present application.

[0025] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale.

[0026] Description of reference numerals:

[0027] 10. Battery management system test tooling;

[0028] 20. Housing; 21. Top plate; 22. Bottom plate; 23. Side plate; 231. Window; 232. Ventilation hole; 24. Air inlet hole;

[0029] 30. Power input interface; 31. Grounding interface; 32. Power positive interface;

[0030] 40. Circuit board assembly; 41. First circuit board; 42. Second circuit board; 43. Analog single-cell battery voltage output interface;

[0031] 50. Voltage-dividing resistor;

[0032] 60. Temperature test module; 601. Test resistor group; 61. Test resistor; 62. Analog temperature sampling interface;

[0033] 70. Switch;

[0034] 80. Fan;

[0035] 90. Fuse. Detailed implementation manners

[0036] The embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings and examples. The following detailed description of the examples and the accompanying drawings are used to exemplarily illustrate the principle of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0037] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0038] Referring to "embodiments" in the present application means that specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in the present application may be combined with other embodiments.

[0039] The orientation terms appearing in the following description are all the directions shown in the drawings, and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0040] In the related art, a battery management system test tooling can be used to perform functional tests on the battery management system to detect whether the battery management system is working properly. The battery management system test tooling needs to use actual mass-produced battery cells to provide electrical energy. The volume of the battery management system test tooling is affected by the number of battery cells. In order to meet the requirements of arranging multiple battery cells, the volume of the battery management system test tooling itself is relatively large, resulting in inconvenience in moving the battery management system test tooling and poor flexibility in use.

[0041] The battery management system test tooling according to the embodiment of the present application can use the input voltage of an external power supply and output an analog single-cell voltage through the analog single-cell voltage output interface, so as to detect the single-cell voltage sampling function of the battery management system. Since the battery management system test tooling does not need to use the actually mass-produced battery cells, the volume of the battery management system test tooling itself is relatively small, which is convenient for movement and has good flexibility in use.

[0042] Figure 1 Schematically shows the structure of the battery management system test tooling 10. Figure 2 Schematically shows the partial exploded structure of the battery management system test tooling 10. Figure 3 Schematically shows the partial structure of the battery management system test tooling 10. Refer to Figure 1 、 Figure 2 and Figure 3 As shown, the battery management system test tooling 10 according to the embodiment of the present application includes a housing 20, a power input interface 30, and a circuit board assembly 40.

[0043] The housing 20 includes a top plate 21 and a bottom plate 22. The power input interface 30 is arranged on the top plate 21 of the housing 20. The power input interface 30 includes a ground interface 31 and a power positive interface 32. The circuit board assembly 40 is arranged between the top plate 21 and the bottom plate 22. The circuit board assembly 40 includes a first circuit board 41, a second circuit board 42, and an analog single-cell voltage output interface 43. The first circuit board 41 is located on the side of the second circuit board 42 facing the top plate 21. The first circuit board 41 and the second circuit board 42 are electrically connected. The power input interface 30 is electrically connected to the first circuit board 41. The analog single-cell voltage output interface 43 is electrically connected to the second circuit board 42.

[0044] The top plate 21 and the bottom plate 22 of the housing 20 are spaced apart to form a space between the top plate 21 and the bottom plate 22. The power input interface 30 is used to connect to an external power supply. The external power supply can be a DC power supply. The ground interface 31 is used to connect to the negative pole of the external power supply. The power positive interface 32 is used to connect to the positive pole of the external power supply. The power input interface 30 is arranged on the top plate 21, which is convenient for connecting the power input interface 30 to the external power supply.

[0045] The circuit board assembly 40 is disposed between the top plate 21 and the bottom plate 22, so that the circuit board assembly 40 can utilize the space formed between the top plate 21 and the bottom plate 22, which is beneficial to ensuring the compact structure of the battery management system test tooling 10. The first circuit board 41 and the second circuit board 42 are arranged at intervals. Corresponding electronic devices can be respectively arranged on the first circuit board 41 and the second circuit board 42. The total board area after adding the board area of the first circuit board 41 and the board area of the second circuit board 42 is relatively large. The way that the first circuit board 41 and the second circuit board 42 are stacked between the top plate 21 and the bottom plate 22 is beneficial to reducing the space occupied by the circuit board assembly 40, beneficial to ensuring the compact structure of the battery management system test tooling 10, and thus beneficial to reducing the volume of the battery management system test tooling 10.

[0046] The power input interface 30 can be electrically connected to the analog single-cell voltage output interface 43 through the first circuit board 41 and the second circuit board 42. When the analog single-cell voltage output interface 43 is docked with the battery management system to be tested, the battery management system to be tested can collect the analog single-cell voltage value output through the analog single-cell voltage output interface 43, so as to detect the single-cell voltage sampling function of the battery management system.

[0047] In some implementable ways, when it is required that the analog single-cell voltage value is 3.6V and the number of single cells connected is 10, the input voltage value of the power positive interface 32 is 3.6V × 10 = 36V. The analog single-cell voltage output interface 43 can output 10 analog single-cell voltage values. The battery management system to be tested can sample the 10 analog single-cell voltage values to simulate the scenario of sampling the single-cell voltage values of 10 single cells in the actual application of the battery management system. It can be understood that the number of single cells connected in simulation is not limited to the above quantity, and can also be any other quantity, such as 1, 2, 3, 16, 20, 24, etc.

[0048] The battery management system test tooling 10 of the embodiments of the present application includes a power input interface 30 and a circuit board assembly 40. The battery management system test tooling 10 can be electrically connected to an external power supply through the power input interface 30 to use the external power supply to supply power to the battery management system test tooling 10, so as to simulate the voltage input by a single cell. After the voltage value input by the power input interface 30 is processed by the circuit board assembly 40, the circuit board assembly 40 outputs an analog single cell voltage value through the analog single cell voltage output interface 43. The battery management system to be tested can sample the analog single cell voltage value, so as to detect the single cell voltage sampling function of the battery management system. The battery management system test tooling 10 of the embodiments of the present application does not need to use actually mass-produced cells, and at the same time, the structure layout of the circuit board assembly 40 itself is compact and occupies a small space, which is beneficial to reducing the volume of the battery management system test tooling 10 itself, making the battery management system test tooling 10 easy to move and having good use flexibility.

[0049] In some realizable ways, the power input interface 30 includes more than two power positive interfaces 32. The battery management system test tooling 10 can be electrically connected to an external power supply using one of all the power positive interfaces 32 according to the test requirements.

[0050] More than two power positive interfaces 32 can respectively correspond to analog access to different numbers of single cells. For example, the number of power positive interfaces 32 is two. The power positive interfaces 32 are marked as V10 and V20. The power positive interface 32 marked as V10 can simulate access to 10 single cells. The power positive interface 32 marked as V20 can simulate access to 20 single cells. For another example, the number of power positive interfaces 32 is 21. The 21 power positive interfaces 32 are respectively marked as V4 to V24. The power positive interface 32 marked as V4 can simulate access to 4 single cells. The power positive interface 32 marked as V5 can simulate access to 5 single cells. And so on, the power positive interface 32 marked as V24 can simulate access to 24 single cells.

[0051] It can be understood that the number of power positive interfaces 32 is not limited to the above numbers, and the corresponding number of power positive interfaces 32 can be selected and set according to the test requirements.

[0052] When the number of single cells to be analog accessed is clear, the corresponding power positive interface 32 can be selected to access the external power supply, so that the number of analog accessed single cells can be quickly and accurately identified according to the mark of the power positive interface 32, which is convenient for recording the number information of the analog accessed single cells corresponding to the current test during the test process.

[0053] Exemplarily, more than two power supply positive interfaces 32 can be arranged on the top plate 21 in an array manner.

[0054] Exemplarily, the ground interface 31 and the power supply positive interface 32 can be sockets. Both the ground interface 31 and the power supply positive interface 32 include jacks. The inner diameter of the jacks can be 4 millimeters (mm).

[0055] Exemplarily, the number of the ground interfaces 31 is one.

[0056] In some implementable ways, the circuit board assembly 40 is detachably connected to the top plate 21. The top plate 21 can provide support for the circuit board assembly 40. There is a spacing between the circuit board assembly 40 and the bottom plate 22. The circuit board assembly 40 does not contact the bottom plate 22. The way that the circuit board assembly 40 is detachably connected to the top plate 21 is beneficial to ensuring the convenience of disassembly and assembly of the circuit board assembly 40 on the top plate 21. In some examples, the circuit board assembly 40 can be connected to the top plate 21 by screws or studs.

[0057] In some examples, the first circuit board 41 and the second circuit board 42 are connected by screws or studs. The first circuit board 41 can be connected to the top plate 21 by screws or studs. The power input interface 30 can be welded to the first circuit board 41 to realize the electrical connection between the power input interface 30 and the first circuit board 41.

[0058] In some implementable ways, Figure 4 Schematically shows a partial circuit of the battery management system test tooling 10. Figure 5 Schematically shows a partial structure of the battery management system test tooling 10. Refer to Figure 3 、 Figure 4 and Figure 5 As shown, the battery management system test tooling 10 further includes a voltage dividing circuit. The power input interface is electrically connected to the voltage dividing circuit. The voltage dividing circuit includes more than two voltage dividing resistors 50. Each voltage dividing resistor 50 is electrically connected to the analog single-cell voltage output interface 43. Both ends of each voltage dividing resistor 50 are electrically connected to the analog single-cell voltage output interface 43.

[0059] More than two voltage-dividing resistors 50 in the voltage-dividing circuit are used to divide the voltage input by the power supply input interface 30. The voltage value on each voltage-dividing resistor 50 in the energized state can simulate the voltage value of a single cell. For example, when it is necessary to simulate that the voltage value of a single cell is 3.6V and the number of single cells connected is 10, the input voltage value of the power supply input interface 30 is 3.6V × 10 = 36V. There can be 10 voltage-dividing resistors 50 in the voltage-dividing circuit in the energized state. The voltage value on each voltage-dividing resistor 50 in the energized state is 3.6V. Correspondingly, the analog single-cell voltage output interface 43 can output 10 analog single-cell voltage values. The battery management system to be tested can sample the 10 analog single-cell voltage values to simulate the scenario of sampling the voltage values of 10 single cells in the actual application of the battery management system.

[0060] In some examples, the number of power supply positive interfaces 32 is 21. The 21 power supply positive interfaces 32 are respectively labeled as V4 to V24. The power supply positive interface 32 labeled as V4 can simulate connecting 4 single cells. The power supply positive interface 32 labeled as V5 can simulate connecting 5 single cells. And so on, the power supply positive interface 32 labeled as V24 can simulate connecting 24 single cells. The number of voltage-dividing resistors 50 in the voltage-dividing circuit can be 24.

[0061] When the power supply positive interface 32 labeled as V4 is connected to an external power supply, it can simulate connecting 4 single cells, and at the same time, 4 voltage-dividing resistors 50 in the voltage-dividing circuit are in the energized state. When the power supply positive interface 32 labeled as V24 is connected to an external power supply, it can simulate connecting 24 single cells, and at the same time, 24 voltage-dividing resistors 50 in the voltage-dividing circuit are in the energized state.

[0062] In some examples, the voltage-dividing resistor 50 can be a 5-watt (W) resistor. When the equalization function of the battery management system to be tested adopts the method of turning on all odd channels or all even channels, the resistance power in the battery management system test tooling 10 meets the test requirements, so that a stable and safe operating environment for the equalization function of the battery management system to be tested can be provided. The battery management system test tooling 10 can simulate lithium iron phosphate single cells, so that the battery management system test tooling 10 can provide a reliable test environment for the equalization operation mode of the battery management system.

[0063] In some examples, a fuse 90 is provided between the power supply input interface 30 and the voltage-dividing circuit. The voltage-dividing resistor 50 can be arranged on the second circuit board 42.

[0064] In some realizable ways, Figure 6 Schematically shows a partial circuit of the battery management system test tooling 10. Refer to Figure 5 and Figure 6As shown, the battery management system test tooling 10 further includes a temperature test module 60. The temperature test module 60 includes a test resistor 61 and an analog temperature sampling interface 62. Both the test resistor 61 and the analog temperature sampling interface 62 are disposed on the second circuit board 42. The test resistor 61 and the analog temperature sampling interface 62 are electrically connected.

[0065] The temperature test module 60 of the battery management system test tooling 10 can be used to test the function of the battery management system for collecting temperature information. The battery management system to be tested can simulate the process of temperature collection by the battery management system in actual application through the temperature test module 60.

[0066] The process of temperature collection by the battery management system to be tested in actual application is as follows: The battery management system can calculate the corresponding temperature value according to the resistance value change of the thermistor (NTC). When the thermistor is in different temperature environments, the thermistor itself presents different resistance values.

[0067] The test resistor 61 in the temperature test module 60 of the embodiment of the present application can simulate the thermistor at the corresponding temperature, so as to effectively test the function of the battery management system for collecting temperature information.

[0068] In some examples, the resistance value of the test resistor 61 can be a fixed resistance value. The resistance value of the test resistor 61 can be 10 kiloohms (kΩ), so as to simulate the resistance value of a thermistor of a certain specification at 25 degrees Celsius (°C). If the thermistor corresponding to the battery management system to be tested in actual application is the thermistor of this specification, when the temperature value collected by the battery management system to be tested is 25 degrees Celsius, it is determined that the function of the battery management system for collecting temperature information is normal.

[0069] In some examples, the number of the test resistors 61 is more than two. Each test resistor 61 can be electrically connected to the analog temperature sampling interface 62 through the circuit on the second circuit board 42, so as to form a plurality of temperature test circuits. Exemplarily, the number of the test resistors 61 is 30, so as to form 30 temperature test circuits.

[0070] In some examples, as shown in Figure 6 The temperature test module 60 includes at least two test resistor groups 601. The resistance values of the test resistors 61 in each test resistor group 601 are the same, and in any two test resistor groups 601, the resistance value of the test resistor 61 in one group is different from that of the test resistor 61 in the other group.

[0071] One test resistor group 601 can simulate a thermistor of a certain specification at the corresponding temperature. Therefore, the temperature test module 60 can simulate thermistors of different specifications at the corresponding temperature, which is beneficial to improving the compatibility of the temperature test module 60.

[0072] Exemplarily, the temperature test module 60 includes two test resistor groups 601. The resistance value of the test resistor 61 in one test resistor group 601 is 10 kΩ, so as to simulate the resistance value of a certain specification of thermistor at 25 degrees Celsius (°C). If the thermistor corresponding to the battery management system to be tested in actual application is the thermistor of this specification, when the temperature value collected by the battery management system to be tested is 25 degrees Celsius, it is determined that the function of the battery management system to collect temperature information is normal.

[0073] The resistance value of the test resistor 61 in the other test resistor group 601 is 100 kΩ, so as to simulate the resistance value of another specification of thermistor at 25 degrees Celsius (°C). If the thermistor corresponding to the battery management system to be tested in actual application is the thermistor of this specification, when the temperature value collected by the battery management system to be tested is 25 degrees Celsius, it is determined that the function of the battery management system to collect temperature information is normal.

[0074] In some examples, each test resistor group 601 includes more than two test resistors 61. The resistance values of the respective test resistors 61 in each test resistor group 601 are the same. Exemplarily, each test resistor group 601 may include 30 test resistors 61, thus forming 30 temperature test circuits.

[0075] In some examples, the test resistor 61 is a surface mount resistor.

[0076] In some examples, referring to Figure 1 and Figure 6 as shown, the battery management system test tooling 10 further includes a changeover switch 70. The changeover switch 70 is arranged on the top plate 21. The changeover switch 70 is used to control any one of all the test resistor groups 601 to be electrically connected to the analog temperature sampling interface 62.

[0077] Through the changeover switch 70, any one of all the test resistor groups 601 can be flexibly and quickly controlled to be electrically connected to the analog temperature sampling interface 62, so as to improve the switching efficiency of the test resistor group 601 and improve the test work efficiency.

[0078] Exemplarily, the changeover switch 70 is detachably connected to the top plate 21. The way the changeover switch 70 is arranged on the top plate 21 is convenient for observing the current state of the changeover switch 70 and can quickly and accurately operate the changeover switch 70.

[0079] Exemplarily, the temperature test module 60 includes two test resistor groups 601. The resistance value of the test resistor 61 in one test resistor group 601 is 10 kΩ, and the resistance value of the test resistor 61 in the other test resistor group 601 is 100 kΩ. The switching switch 70 can control one of the two test resistor groups 601 to be electrically connected to the analog temperature sampling interface 62.

[0080] In some implementable ways, Figure 7 Schematically shows a partial structure of the battery management system test tooling 10. Refer to Figure 7 As shown, the analog single-cell voltage output interface 43 and the analog temperature sampling interface 62 are both disposed on the board surface of the second circuit board 42 facing the first circuit board 41.

[0081] A space is formed between the first circuit board 41 and the second circuit board 42. The analog single-cell voltage output interface 43 and the analog temperature sampling interface 62 can multiplex the space between the first circuit board 41 and the second circuit board 42, thereby further making the structure of the circuit board assembly 40 more compact, occupying less space, and being beneficial to improving the overall structural compactness of the battery management system test tooling 10.

[0082] In some implementable ways, the first circuit board 41 can be rectangular. The second circuit board 42 can be rectangular. The analog single-cell voltage output interface 43 and the analog temperature sampling interface 62 are both disposed on the same board edge of the second circuit board 42.

[0083] The analog single-cell voltage output interface 43 and the analog temperature sampling interface 62 can utilize the board surface at the same board edge of the second circuit board 42, which is beneficial to improving the board surface utilization rate of the second circuit board 42 and reducing board surface waste. The analog single-cell voltage output interface 43 and the analog temperature sampling interface 62 are located on the same side, which is beneficial to reducing the docking operation difficulty between the battery management system test tooling 10 and the battery management system to be tested.

[0084] In some implementable ways, Figure 8 Schematically shows the structure of the battery management system test tooling 10. Refer to Figure 8 As shown, the housing 20 includes side plates 23. The side plates 23 include openings 231. The analog single-cell voltage output interface 43 and the analog temperature sampling interface 62 are both disposed corresponding to the openings 231, so that the analog single-cell voltage output interface 43 and the analog temperature sampling interface 62 are in an exposed and visible state, which is convenient for docking with the battery management system to be tested.

[0085] The side plate 23 includes ventilation holes 232. The battery management system test tooling 10 further includes a fan 80. The fan 80 is connected to the side plate 23. The fan 80 is disposed corresponding to the ventilation holes 232. The fan 80 can achieve forced convection to effectively dissipate heat and cool the battery management system test tooling 10, reducing the possibility that the internal temperature of the battery management system test tooling 10 is too high and affecting the test work.

[0086] In some examples, the side plate 23 includes a front cover plate, a rear cover plate, a left cover plate, and a right cover plate. The front cover plate is provided with an opening window 231. The rear cover plate may be provided with an air inlet hole. The left cover plate and the right cover plate are respectively provided with ventilation holes 232 and the fan 80. The bottom plate 22 of the housing 20 may be provided with an air inlet hole 24. When the fan 80 operates, the gas in the external environment can enter the interior of the housing 20 through the air inlet hole of the rear cover plate and the air inlet hole 24 of the bottom plate 22, and then be discharged from the ventilation holes 232.

[0087] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery management system test tool, characterized in that: include: a housing, including a top plate and a bottom plate; A power input interface, provided on the top plate, the power input interface comprising a ground interface and a positive power interface; A circuit board assembly is arranged between the top plate and the bottom plate, and the circuit board assembly includes a first circuit board, a second circuit board and a simulated single cell voltage output interface, the first circuit board is located on the side of the second circuit board facing the top plate, the first circuit board and the second circuit board are electrically connected, the power input interface is electrically connected to the first circuit board, and the simulated single cell voltage output interface is electrically connected to the second circuit board.

2. The battery management system test tool according to claim 1, characterized in that: The power input interface includes more than two power positive electrode interfaces.

3. The battery management system test tool according to claim 2, characterized in that: The battery management system test tool also includes a voltage divider circuit, the power input interface is electrically connected to the voltage divider circuit, the voltage divider circuit includes more than two voltage divider resistors, and each of the voltage divider resistors is electrically connected to the simulated single cell voltage output interface.

4. The battery management system test tool according to claim 1, characterized in that: The circuit board assembly is detachably connected to the top plate.

5. The battery management system test tool according to any one of claims 1 to 4, characterized in that: The battery management system test tool also includes a temperature test module, which includes a test resistor and an analog temperature sampling interface. The test resistor and the analog temperature sampling interface are both arranged on the second circuit board, and the test resistor and the analog temperature sampling interface are electrically connected.

6. The battery management system test tool according to claim 5, characterized in that: The temperature testing module includes at least two testing resistor groups, the test resistors in each of the testing resistor groups have the same resistance value, and in any two of the testing resistor groups, the resistance value of the test resistors in one is different from the resistance value of the test resistors in the other.

7. The battery management system test tool according to claim 6, characterized in that: The battery management system test tool also includes a switching switch, which is arranged on the top plate, and the switching switch is used to control any one of all the test resistor groups to be electrically connected to the analog temperature sampling interface.

8. The battery management system testing tool according to claim 5, characterized in that: The analog single cell voltage output interface and the analog temperature sampling interface are both arranged on the board surface of the second circuit board facing the first circuit board.

9. The battery management system test tool according to claim 5, characterized in that: The second circuit board is rectangular, and the analog single cell voltage output interface and the analog temperature sampling interface are both arranged on the same board edge of the second circuit board.

10. The battery management system testing tool according to claim 5, characterized in that: The shell includes a side panel, the side panel includes a window, the analog single cell voltage output interface and the analog temperature sampling interface both correspond to the window setting, the side panel includes ventilation holes, and the battery management system test tooling also includes a fan, the fan is connected to the side panel, and the fan is set corresponding to the ventilation holes.

Images