BMS board testing tool and BMS board testing device
By setting up a switching unit and a temperature simulation unit in the BMS board test fixture, compatibility testing of different numbers of battery cells stacking schemes was achieved, reducing testing costs and improving production efficiency.
Patent Information
- Application Number
- CN202423032484.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing BMS board testing fixtures need to be customized for each different BMS board, resulting in high testing costs and low production efficiency, and are not compatible with different numbers of battery cell stacking solutions.
By setting up a switching unit in the test fixture to short-circuit the connection ports corresponding to the uncollected battery cells, BMS boards with different numbers of acquisition interfaces can be adapted to achieve multi-functional testing by combining a temperature simulation unit and a current sampling circuit.
It reduces testing costs, improves BMS board production efficiency, is compatible with BMS boards of different serial numbers, and solves the problem of customized testing fixtures.
Smart Images
Figure CN223637565U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of BMS board testing, in particular to a BMS board testing tool and a BMS board testing device. BACKGROUND
[0002] In the current new energy battery industry, different cell stacking schemes will result in different structures of BMS (Battery Monitoring and Management System) boards and different numbers of single cell voltage sampling strings. In most cases, when the number of cells changes, the number of single cell voltage sampling of the BMS board will also change. When the single cell sampling of the BMS board changes, the testing tool needs to be re-customized, which not only consumes time but also greatly increases the testing cost.
[0003] The related BMS board testing tool needs to customize a corresponding testing tool for each different BMS board, which leads to an increase in testing cost and affects production efficiency. CONTENT OF THE UTILITY MODEL
[0004] The present application provides a BMS board testing tool and a BMS board testing device, which can reduce the testing cost and improve the production efficiency of the BMS board without setting corresponding testing tools for BMS boards with various numbers of collection interfaces.
[0005] In a first aspect, the present application provides a BMS board testing tool, which comprises: at least one simulated battery pack, each simulated battery pack comprising a plurality of series-connected battery cells; and at least one mounting position corresponding to a simulated battery pack and used for mounting a BMS board to be tested, each mounting position being provided with a plurality of connection ports, each connection port being electrically connected to a battery cell in the corresponding simulated battery pack, and at least some adjacent connection ports being connected through a switching unit; wherein the number of connection ports is greater than or equal to the number of collection interfaces of the BMS board to be tested; and wherein, when the BMS board to be tested is tested, the connection ports corresponding to the battery cells that are not collected are short-circuited through the switching unit.
[0006] The mounting position comprises a first mounting position and a second mounting position, and the first mounting position and the second mounting position can respectively place different BMS boards for testing.
[0007] The switching unit is a relay.
[0008] The testing tool further comprises a temperature simulation unit.
[0009] The temperature simulation unit is composed of a plurality of thermistors.
[0010] The thermal resistance includes a first thermal resistance, a second thermal resistance and a third thermal resistance; the resistance value of the first thermal resistance is greater than that of the second thermal resistance, and the resistance value of the second thermal resistance is greater than that of the third thermal resistance.
[0011] Each connection port is electrically connected with a battery cell in the analog battery pack through a resistive element.
[0012] The test tool further includes a current sampling circuit.
[0013] The test tool further includes a control chip connected with the control end of each switch unit.
[0014] Each connection port is provided with a corresponding sampling contact.
[0015] In a second aspect, the application provides a test device for a BMS board, which includes the test tool provided in the first aspect and an auxiliary battery management unit.
[0016] The BMS board test tool and the BMS board test device provided in the application have the following beneficial effects: Different from the prior art, when the test tool is used to test a BMS board, the connection port corresponding to the battery cell that is not collected is short-circuited through the switch unit, so that the test tool can be adapted to each BMS board, and it is not necessary to provide a corresponding test tool for a BMS board with a collection interface of various quantities, thereby reducing the test cost and improving the production efficiency of the BMS board. That is, the BMS board test tool and the BMS board test device provided in the application can be used to test a BMS board collecting battery cells of different strings. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort. Among them:
[0018] Figure 1 is a structural schematic diagram of an embodiment of the BMS board test tool provided in the application;
[0019] Figure 2 is a structural schematic diagram of another embodiment of the BMS board test tool provided in the application;
[0020] Figure 3 is a structural schematic diagram of another embodiment of the BMS board test tool provided in the application;
[0021] Figure 4is a structural schematic diagram of an embodiment of a test device of a BMS board provided by the present application. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only parts related to the present application are shown in the drawings, but not all structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0023] Reference to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative embodiments to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0024] At present, in the new energy battery industry, different cell stacking schemes will make the structure of the BMS board and the number of single cell voltage sampling strings different. In most cases, when the number of cells changes, the number of single cell voltage sampling of the BMS board will also change. When the single cell sampling of the BMS board changes, the test tool needs to be re-customized, which not only consumes time, but also greatly increases the test cost.
[0025] The related BMS board test tool needs to customize the corresponding test tool for each different BMS board, which leads to an increase in test cost and affects production efficiency.
[0026] Therefore, the present application proposes to set a switch unit between at least part of the adjacent connection ports. When testing the BMS board to be tested, the connection port corresponding to the battery monomer not collected is short-circuited through the switch unit, so as to adapt to each BMS board to be tested. There is no need to set the corresponding test tool for the BMS board with different numbers of collection interfaces, which reduces the test cost, improves the production efficiency of the BMS board, and solves at least one of the above technical problems. For details, see the following embodiments.
[0027] Reference Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of a test tool of a BMS board provided by the present application. The test tool comprises a simulated battery pack 10 and a mounting position 20.
[0028] The simulated battery pack 10 comprises a plurality of series-connected battery monomers.
[0029] The installation site 20 is used for installing the BMS board to be tested, and a plurality of connection ports are arranged on the installation site 20. Figure 1 BAT0-S, BAT1+, BAT2+, BAT3+, BAT4+, BAT5+, BAT6+, BAT7+, BAT8+, BAT9+, BAT10+, BAT11+, BAT12+, BAT13+, BAT14+, BAT15+, BAT16+, and BAT1+P in FIG.
[0030] Each connection port is electrically connected to a battery cell in the analog battery pack 10. In some embodiments, each connection port is electrically connected to a battery cell in the analog battery pack 10 through a resistive element. The resistive element can be a resistor, for example.
[0031] At least some adjacent connection ports are connected through a switch unit 30. The number of connection ports is greater than or equal to the number of acquisition interfaces of the BMS board to be tested. That is, the switch unit 30 is connected to the connection line between the adjacent connection ports and the battery cell.
[0032] In some embodiments, the connection ports corresponding to the necessary acquisition interfaces of the BMS board to be tested can not be provided with the switch unit 30.
[0033] In some embodiments, the switch unit 30 can be set according to the type of the BMS board. For example, the connection ports corresponding to the BMS board with the least number of acquisition interfaces can not be provided with the switch unit 30. The remaining connection ports are provided with the switch unit 30, so as to reduce the use of the switch unit 30 and the hardware cost.
[0034] In an application scenario, when the BMS board to be tested is set on the installation site and the BMS board to be tested is tested, the connection ports not connected to the BMS board to be tested are short-circuited through the switch unit.
[0035] In the present embodiment, when the BMS board to be tested is tested, the connection ports corresponding to the battery cells not acquired are short-circuited through the switch unit by setting the switch unit between at least some adjacent connection ports, so as to adapt to each BMS board to be tested. It is not necessary to set the corresponding test tooling for the BMS boards with various numbers of acquisition interfaces, so as to reduce the test cost and improve the production efficiency of the BMS board.
[0036] In an application scenario, the present application is combined with Figure 2 for illustration.
[0037] As shown in FIG. Figure 2 The analog battery pack 10 includes 16 battery cells connected in series. There are 17 connection ports arranged on the installation site 20. As shown in FIG. Figure 2BAT0-S, BAT1+, BAT2+, BAT3+, BAT4+, BAT5+, BAT6+, BAT7+, BAT8+, BAT9+, BAT10+, BAT11+, BAT12+, BAT13+, BAT14+, BAT15+, BAT16+ S, BAT1+P.
[0038] Each connection port is sequentially electrically connected with a battery cell in the analog battery pack 10, and the data of 16 battery cells can be collected respectively. There are 10 switch units 30, and each switch unit 30 is arranged between adjacent connection ports and is connected at the same time, so that 10 battery cells can be short-circuited.
[0039] For example, if the number of collection interfaces of the BMS board to be tested is 10, 6 switch units are connected, and 6 battery cells are short-circuited. For example, BAT10+, BAT11+, BAT12+, BAT13+, BAT14+, BAT15+, and BAT16+ S are connected by 6 switch units, and the corresponding 6 battery cells are short-circuited.
[0040] In some embodiments, the switch unit is a relay. Adjacent connection ports can be connected to a group of contacts of the relay. When the relay coil is energized, the group of contacts is connected, adjacent connection ports are connected, and the battery cells corresponding to the adjacent connection ports are short-circuited.
[0041] In some embodiments, the test tool further comprises a temperature simulation unit.
[0042] The temperature simulation unit is composed of a plurality of thermistors.
[0043] The thermistors include a first thermistor, a second thermistor, and a third thermistor. The resistance value of the first thermistor is greater than that of the second thermistor, and the resistance value of the second thermistor is greater than that of the third thermistor.
[0044] For example, the resistance value of the first thermistor is 100K ohms, the resistance value of the second thermistor is 10K ohms, and the resistance value of the third thermistor is 1K ohms. There are corresponding temperature detection ports on the installation site, which are connected with the thermistors and connected with the temperature collection ports of the BMS board during testing of the BMS board.
[0045] By setting the temperature simulation unit in the test tool, the temperature detection function of the BMS board can be realized, and the test of the temperature detection function of the BMS board can be completed. The number of thermistors in the temperature simulation unit is determined according to the temperature detection function of the BMS board.
[0046] Referring to Figure 3 , Figure 3is a structural schematic diagram of another embodiment of the test tool of the BMS board provided in the present application. The test tool 100 comprises a first simulated battery pack 11, a second simulated battery pack 12, a first mounting position 21 and a second mounting position 22. The first mounting position 21 and the second mounting position 22 can respectively place different BMS boards for testing. That is, the test tool 100 can simultaneously test multiple BMS boards, improving the test efficiency. That is, the first simulated battery pack 11 and the first mounting position 21 can cooperate to test a BMS board. The second simulated battery pack 12 and the second mounting position 22 can cooperate to test another BMS board.
[0047] The first mounting position 21 and the second mounting position 22 are used for mounting the BMS board to be tested, and a plurality of connection ports are arranged on the first mounting position 21 and the second mounting position 22.
[0048] Each connection port of the first mounting position 21 is electrically connected with a battery cell in the first simulated battery pack 11. Each connection port of the second mounting position 22 is electrically connected with a battery cell in the second simulated battery pack 12. In some embodiments, each connection port is electrically connected with the battery cell through a resistive element. The resistive element can be a resistor. The resistance of the resistor can be 1 ohm.
[0049] At least part of the adjacent connection ports are connected through a switching unit. In some embodiments, the switching unit is a relay. For example, at least part of the adjacent connection ports of the first mounting position 21 are connected through a first switching unit 31. At least part of the adjacent connection ports of the second mounting position 22 are connected through a second switching unit 32.
[0050] In some embodiments, each mounting position corresponds to a corresponding temperature simulation unit. The temperature simulation unit is composed of a plurality of thermistors. For example Figure 3 As shown, the NTC1+, NTC2+, NTC3+, NTC4+, NTC5+, NTC6+, NTC7+ and NTC8+ ports on the mounting position are all connected with corresponding thermistors, constituting a temperature simulation unit.
[0051] The thermistor comprises a first thermistor, a second thermistor and a third thermistor; the resistance of the first thermistor is greater than the resistance of the second thermistor, and the resistance of the second thermistor is greater than the resistance of the third thermistor.
[0052] In any of the above embodiments, the test tool further comprises a control chip connected to the control end of each switching unit, for controlling the corresponding switching unit to be turned on according to the type of the BMS board to be tested during testing.
[0053] In any of the above embodiments, the test tool further comprises a current sampling circuit, which can simulate the power consumption test function of the BMS board.
[0054] In some embodiments, each connection port is provided with a corresponding sampling contact, and data during the test of the BMS board under test can be collected by connecting the sampling contacts, and whether the BMS board under test meets the factory requirements can be measured by using the data. Figure 3 The identifier starting with TP in the middle corresponds to the position of the corresponding sampling contact.
[0055] In an application scenario, in a BMS board with high functional safety requirements, the AFE (analog frontend) chip of the BMS board has a highest string of single cell voltage sampling lines and AFE power supply lines that are separately routed on the BMS board, and then are separately connected to the battery highest string single cell from the outside. When the number of strings of the BMS board is reduced, if the AFE power supply line of the external analog of the FCT (Functional Circuit Test) tool and the sampling line of the highest string single cell are not on the same single cell, it will cause the voltage sampling of the highest string of the BMS board to deviate during the FCT test. By the way of the present application, relays (switching power supplies) are added between the single cell voltage output channels of the battery simulator in the test tool to short circuit, so that no matter how many strings the BMS board is, the sampling line and the power line of the highest string single cell can be shorted together, thereby solving the problem of low voltage sampling of the highest string single cell of the BMS board during the FCT test.
[0056] That is, the test tool of the present application has the following functions:
[0057] First, use the simulated battery pack 10 to simulate the single cell of the battery for the BMS board to perform single cell voltage sampling test.
[0058] Second, add relays between the channels of each battery single cell to short the single cells not used, to solve the problem of deviation of the highest string single cell voltage sampling of the AFE chip in the BMS board.
[0059] Third, integrate a multi-channel battery temperature simulation unit to realize the external temperature function of the battery tested by the BMS board.
[0060] Fourth, integrate an ammeter to realize the power consumption test of the BMS board.
[0061] In some embodiments, the BMS board can be a BMS slave board.
[0062] In some embodiments, the number of simulated battery packs and the number of mounting positions in the test tool are set according to actual conditions. For example, two simulated battery packs and two mounting positions. For example, three simulated battery packs and three mounting positions. For example, four simulated battery packs and four mounting positions.
[0063] Reference is made to Figure 4 , Figure 4is a structural schematic diagram of an embodiment of a test device of a BMS board provided by the present application. The test device 1000 includes a test tool 100 and an auxiliary test battery management unit 200. The test tool 100 is as described in any of the above embodiments. The auxiliary test battery management unit 200 can be composed of a battery management unit. The battery management unit is connected to the corresponding ports on the test tool 100, and the auxiliary test tool 100 tests the BMS board to be tested.
[0064] In summary, the test tool 100 of the BMS board and the test device 1000 of the BMS board provided by the present application, by setting a switching unit between at least some adjacent connection ports, when testing the BMS board to be tested, the connection port corresponding to the battery monomer not collected is short-circuited through the switching unit, thereby adapting each BMS board to be tested. There is no need to set a corresponding test tool for BMS boards with various numbers of collection interfaces, which reduces the test cost and improves the production efficiency of the BMS board.
[0065] In the several embodiments provided by the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, another division mode can be used. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.
[0066] The integrated units in the above other embodiments, if realized in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor 10 to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.
[0067] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation based on the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.
Claims
1. A test fixture for a BMS board, characterized by, The test tool comprises: at least one simulation battery group, each simulation battery group comprising a plurality of battery cells connected in series; at least one installation site, each installation site corresponding to a simulation battery group and used for installing a BMS board to be tested, each installation site being provided with a plurality of connection ports, each connection port being electrically connected to the battery cells in the corresponding simulation battery group, and at least some adjacent connection ports being connected through a switch unit; wherein the number of the connection ports is greater than or equal to the number of acquisition interfaces of the BMS board to be tested; wherein, when the BMS board to be tested is tested, the connection ports corresponding to the battery cells not acquired are short-circuited through the switch unit.
2. The test fixture of claim 1, wherein, The installation site comprises a first installation site and a second installation site, and the first installation site and the second installation site can respectively place different BMS boards for testing.
3. The test fixture of claim 1, wherein, The switch unit is a relay.
4. The test fixture of claim 1, wherein, The test tool further comprises a temperature simulation unit.
5. The test fixture of claim 4, wherein, The temperature simulation unit is composed of a plurality of thermistors.
6. The test fixture of claim 5, wherein, The thermistors comprise a first thermistor, a second thermistor and a third thermistor; the resistance value of the first thermistor is greater than that of the second thermistor, and the resistance value of the second thermistor is greater than that of the third thermistor.
7. The test fixture of claim 1, wherein, The test tool further comprises a current sampling circuit.
8. The test fixture of claim 1, wherein, The test tool further comprises a control chip connected to the control end of each switch unit.
9. The test fixture of any of claims 1-8, wherein, Each connection port is provided with a corresponding sampling contact.
10. A test device for a BMS board, characterized in that, The test device comprises the test tool according to any one of claims 1-9 and an auxiliary battery management unit.