BMS capacitive to-be-loaded test tool
By designing a BMS capacitive load testing tool, the BMS testing process was simplified, costs were reduced, and the accuracy and security of testing were improved, solving the problem of expensive and complex BMS testing in existing technologies.
Patent Information
- Application Number
- CN202520421411.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing BMS testing equipment is expensive and complex to operate, resulting in long testing cycles and inaccurate results, and may even damage the BMS.
A BMS capacitive load test tool was designed, including a housing, a battery under test, a BMS test module, a capacitor bank, and a switch module. The battery under test is directly tested through the BMS test module, which simplifies the process and reduces costs.
This simplifies the BMS capacitive load testing process, reduces costs, and ensures testing accuracy and safety through the design of capacitor banks and switch modules.
Smart Images
Figure CN223977332U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of BMS testing technology, and in particular to a BMS capacitive load testing tool. Background Technology
[0002] In the existing technology, BMS testing equipment is usually expensive, and BMS capacity testing tools usually involve complex parameter settings and cumbersome testing procedures. They also require professional operators to test the BMS, resulting in a long testing cycle. Furthermore, improper operation can lead to inaccurate test results or even damage to the BMS. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a BMS capacitive load testing tool, which can simplify the BMS capacitive load testing process and reduce costs.
[0004] On one hand, the BMS capacitive load testing tool according to an embodiment of the present invention includes:
[0005] case;
[0006] The battery under test is disposed inside the casing;
[0007] The BMS test module is located inside the housing and connected to the battery under test.
[0008] A capacitor bank is disposed inside the housing and is connected to the BMS test module and the battery under test respectively. The capacitor bank is used to supply power to the battery under test.
[0009] A switch module is disposed inside the housing and connected to the capacitor bank and the BMS test module.
[0010] According to some embodiments of the present invention, the battery under test is also connected to a discharge circuit, and the discharge circuit is provided with multiple discharge resistors, which are connected in series.
[0011] According to some embodiments of the present invention, the battery under test is further connected to a discharge indicator unit, which is connected to both the battery under test and the discharge circuit.
[0012] According to some embodiments of this utility model, the capacitor bank is provided with a first capacitor unit, a second capacitor unit, a third capacitor unit, a fourth capacitor unit, a fifth capacitor unit, a sixth capacitor unit, a seventh capacitor unit, an eighth capacitor unit, a ninth capacitor unit, and a tenth capacitor unit. The switch module is provided with a first air switch, a second air switch, a third air switch, a fourth air switch, a fifth air switch, a sixth air switch, a seventh air switch, an eighth air switch, a ninth air switch, and a tenth air switch. The first capacitor unit is connected to the first air switch, the second capacitor unit is connected to the second air switch, the third capacitor unit is connected to the third air switch, and the fourth capacitor unit is connected to the fourth air switch. The circuit is connected to the air switch. The fifth capacitor unit is connected to the fifth air switch, the sixth capacitor unit is connected to the sixth air switch, the seventh capacitor unit is connected to the seventh air switch, the eighth capacitor unit is connected to the eighth air switch, the ninth capacitor unit is connected to the ninth air switch, and the tenth capacitor unit is connected to the tenth air switch. The switch module is also equipped with a master switch. The current range of the first air switch, the second air switch, the third air switch, the fourth air switch, the fifth air switch, the sixth air switch, the seventh air switch, the eighth air switch, the ninth air switch, and the tenth air switch increases sequentially.
[0013] According to some embodiments of the present invention, the housing includes a front plate, a rear plate, a left side plate, a right side plate, a top plate, and a bottom plate. The bottom plate is connected to the lower side of the front plate, the rear plate, the left side plate, and the right side plate, respectively, and the top plate is connected to the upper side of the front plate, the rear plate, the left side plate, and the right side plate, respectively.
[0014] According to some embodiments of the present invention, a partition plate is further provided inside the housing. The partition plate is used to divide the interior of the housing into a first accommodating cavity and a second accommodating cavity. The first accommodating cavity is used to place the battery under test, and the second accommodating cavity is used to place the BMS test module and the capacitor bank.
[0015] According to some embodiments of the present invention, the first receiving cavity is provided with a plurality of first wiring holes, and the second receiving cavity is provided with a plurality of first wiring grooves.
[0016] According to some embodiments of this example, the capacitor bank is also provided with multiple adjustment levels.
[0017] The BMS capacitive load testing tool according to the embodiments of this utility model has at least the following beneficial effects:
[0018] The system comprises: a housing; a battery under test (BUT), housed inside the housing; a battery management system (BMS) testing module, also housed inside the housing and connected to the BUT; a capacitor bank, also housed inside the housing and connected to both the BMS testing module and the BUT, providing power to the BUT; and a switch module, also housed inside the housing and connected to both the capacitor bank and the BMS testing module. According to this embodiment, the BMS testing module directly tests the BUT without adjusting the capacitor bank's capacity, thus simplifying the BMS capacitive load testing process and reducing costs.
[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0021] Figure 1 This is a schematic diagram of the overall structure of the BMS capacitive load testing tool according to an embodiment of the present invention;
[0022] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model;
[0023] Figure 3 This is a schematic diagram of the structure of the BMS test module and capacitor bank according to an embodiment of the present invention;
[0024] Figure 4 This is a schematic diagram of the structure of the first and second receiving cavities according to an embodiment of the present utility model;
[0025] Figure 5 This is a schematic diagram of an embodiment of the present utility model.
[0026] Figure label:
[0027] Housing 100, front panel 110, rear panel 120, left side panel 130, right side panel 140, top panel 150, bottom panel 160, partition plate 170, first receiving cavity 180, first wiring hole 181, second receiving cavity 190, first wiring groove 191, battery under test 200, discharge circuit 210, discharge resistor 211, discharge indicator unit 220, BMS test module 300, capacitor bank 400, first capacitor unit 401, second capacitor unit 402, third capacitor unit 403, fourth capacitor unit 404 The following components are included: fifth capacitor unit 405, sixth capacitor unit 406, seventh capacitor unit 407, eighth capacitor unit 408, ninth capacitor unit 409 and tenth capacitor unit 4011; switch module 500; main switch 501; first air switch 510; second air switch 520; third air switch 530; fourth air switch 540; fifth air switch 550; sixth air switch 560; seventh air switch 570; eighth air switch 580; ninth air switch 590; and tenth air switch 5011. Detailed Implementation
[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0031] Reference Figure 1This utility model provides a BMS capacitive load testing tool, including a housing 100; a battery under test 200 disposed inside the housing 100; a BMS testing module 300 disposed inside the housing 100 and connected to the battery under test 200; a capacitor bank 400 disposed inside the housing 100 and connected to both the BMS testing module 300 and the battery under test 200, the capacitor bank 400 being used to supply power to the battery under test 200; and a switch module 500 disposed inside the housing 100 and connected to both the capacitor bank 400 and the BMS testing module 300. According to the technical solution of this embodiment, the battery under test 200 is tested directly through the BMS testing module 300, without adjusting the capacity of the capacitor bank 400 for BMS testing, thereby simplifying the BMS capacitive load testing process and reducing costs.
[0032] It should be noted that the BMS test module 300 can accurately simulate the battery's operating state and collect key battery parameters in real time, thereby evaluating the performance of the BMS. During the test, the switch module 500 can control the circuit's on / off state in real time to prevent dangerous situations such as overcharging, over-discharging, or overheating of the battery.
[0033] In this embodiment, the capacitor bank 400 is charged by a battery connected to the BMS test module 300. The BMS test module 300 determines whether the capacitor bank 400 has completed pre-charging based on the collected current and voltage. When the capacity of the selected battery is exactly the maximum capacity that the BMS test module 300 can complete the pre-charging, it can be determined whether the battery under test 200 meets the technical requirements, thereby accurately ensuring the range of the battery's capacitive load capacity is tested.
[0034] Reference Figure 1 and Figure 5 The battery under test 200 is also connected to a discharge circuit 210, which is equipped with multiple discharge resistors 211 connected in series.
[0035] It should be noted that the discharge circuit 210 in this embodiment consists of six resistors with a resistance of 6Ω and a power of 100W connected in series. By connecting multiple resistors in series, the discharge current of the capacitor bank 400 can be precisely controlled, making the discharge of the capacitor bank 400 more stable and efficient, so that the BMS test module 300 can accurately evaluate the battery under test 200. In addition, the multiple series resistors can also limit the magnitude of the discharge current, preventing excessive current from damaging the capacitor bank 400. At the same time, the voltage division effect of the discharge circuit 210 can also protect the capacitor bank 400 and the battery under test 200 from the effects of instantaneous high voltage.
[0036] Reference Figure 2 The battery under test 200 is also connected to a discharge indicator unit 220, which is connected to both the battery under test 200 and the discharge circuit 210. It should be noted that when the battery under test 200 begins to discharge, the current in the circuit changes accordingly. The discharge indicator unit 220 senses this current change through internally preset sensors or components. The discharge indicator unit 220 monitors the discharge state of the capacitor bank 400 in real time to ensure and prevent over-discharge or under-discharge of the battery. During testing, if the discharge indicator unit 220 displays an abnormal indication (such as an LED indicator not lighting up or a buzzer not sounding), the tester can quickly locate the fault and perform corresponding troubleshooting and repairs.
[0037] Reference Figure 3 and Figure 5 The capacitor bank 400 includes a first capacitor unit 401, a second capacitor unit 402, a third capacitor unit 403, a fourth capacitor unit 404, a fifth capacitor unit 405, a sixth capacitor unit 406, a seventh capacitor unit 407, an eighth capacitor unit 408, a ninth capacitor unit 409, and a tenth capacitor unit 4011. The switch module 500 includes a first air switch 510, a second air switch 520, a third air switch 530, a fourth air switch 540, a fifth air switch 550, a sixth air switch 560, a seventh air switch 570, an eighth air switch 580, a ninth air switch 590, and a tenth air switch 5011. The first capacitor unit 401 is connected to the first air switch 510, the second capacitor unit 402 is connected to the second air switch 520, and the third capacitor unit 403 is connected to the third air switch 530. The fourth capacitor unit 404 is connected to the fourth air switch 540, the fifth capacitor unit 405 is connected to the fifth air switch 550, the sixth capacitor unit 406 is connected to the sixth air switch 560, the seventh capacitor unit 507 is connected to the seventh air switch 570, the eighth capacitor unit 408 is connected to the eighth air switch 580, the ninth capacitor unit 409 is connected to the ninth air switch 590, and the tenth capacitor unit 4011 is connected to the tenth air switch 5011. The switch module also includes a main switch 501. The current ranges of the first air switch 510, the second air switch 520, the third air switch 530, the fourth air switch 540, the fifth air switch 550, the sixth air switch 560, the seventh air switch 570, the eighth air switch 580, the ninth air switch 590, and the tenth air switch 5011 increase sequentially.
[0038] It should be noted that the first capacitor unit 401, the second capacitor unit 402, the third capacitor unit 403, and the fourth capacitor unit 404 use capacitors with a capacitance of 680uF and a withstand voltage of 250V, while the fifth capacitor unit 405, the sixth capacitor unit 406, the seventh capacitor unit 407, the eighth capacitor unit 408, the ninth capacitor unit 409, and the tenth capacitor unit 4011 use capacitors with a capacitance of 1000uF and a withstand voltage of 250V. In this embodiment, by configuring air switches with different rated circuits for different capacitor groups, fine circuit protection is achieved within the BMS capacitive load test tool. Multiple air switches can quickly cut off the circuit in case of excessive current or short circuit, thereby preventing safety accidents such as equipment damage. Furthermore, the configuration of multiple air switches and capacitor units makes the test tool more flexible and scalable, allowing the BMS capacitive load test tool to be adjusted or expanded as needed to adapt to different application scenarios and requirements.
[0039] Reference Figure 2 The housing 100 includes a front plate 110, a rear plate 120, a left side plate 130, a right side plate 140, a top plate 150, and a bottom plate 160. The bottom plate 160 is connected to the lower side of the front plate 110, the rear plate 120, the left side plate 130, and the right side plate 140, respectively. The top plate 150 is connected to the upper side of the front plate 110, the rear plate 120, the left side plate 130, and the right side plate 140, respectively.
[0040] It should be noted that the connection between the base plate 160 and the top plate 150 and the four side plates (front, rear, left, and right) forms a complete enclosed structure, significantly enhancing the overall rigidity of the housing 100. The enclosed housing 100 structure effectively resists external pressure or impact, preventing deformation or damage. Furthermore, the complete housing 100 structure also provides an effective electromagnetic shielding layer between the BMS test module 300 and the battery under test 200, reducing the impact of external electromagnetic interference on the internal circuitry of the test tool, ensuring the accuracy and reliability of the test results. In addition, the housing 100 prevents dust, moisture, and other contaminants from entering the test tool, thereby protecting internal components from damage.
[0041] Reference Figure 4 The housing 100 is also provided with a partition plate 170, which is used to divide the interior of the housing 100 into a first receiving cavity 180 and a second receiving cavity 190. The first receiving cavity 180 is used to place the battery under test, and the second receiving cavity 190 is used to place the BMS test module 300 and the capacitor bank 400.
[0042] It should be noted that this is specifically designed for housing the battery under test. This ensures the battery under test is physically separated from other parts of the testing equipment (such as the BMS test module 300 and capacitor bank 400), reducing mutual interference. Simultaneously, this provides a safe and stable testing environment for the battery under test. The second housing 190 is used to house the BMS test module 300 and capacitor bank 400, allowing them to work closely together to complete the testing task. Furthermore, because the BMS test module 300 is separated from the battery under test and capacitor bank 400, electromagnetic interference and heat transfer can be more effectively reduced, thereby improving the accuracy and stability of the test. In addition, the separator 170 also serves a safety and protective function, reducing the safety risks of short circuits or electric shock.
[0043] Reference Figure 2 and Figure 5 The first receiving cavity 180 is provided with a plurality of first wiring holes 181, and the second receiving cavity 190 is provided with a plurality of first wiring grooves 191.
[0044] It should be noted that the first wiring hole 181 allows wires or cables to be easily led out from the first receiving cavity 180 (typically used to house the battery under test) and connected to other parts of the test system. The design of multiple wiring holes provides various wiring options, making wiring more flexible and tidy. The first wiring trough 191, located in the second receiving cavity 190 (used to house the BMS test module 300 and capacitor bank 400), provides a fixed path for wires or cables. This avoids wiring clutter and crossing, ensuring the neatness and reliability of the test system. The first wiring hole 181 and the first wiring trough 191 reduce electromagnetic interference between wires or cables, ensuring the accuracy and reliability of test results. Furthermore, the wiring holes and troughs also serve a heat dissipation and ventilation function. By allowing airflow, the wiring holes and troughs can dissipate heat generated inside the test tool in a timely manner, preventing overheating from damaging the internal components of the housing 100.
[0045] The capacitor bank 400 also features multiple adjustable settings. It's worth noting that by selecting the appropriate setting, the capacitance requirements of the battery under test can be more closely matched, thereby improving the accuracy and precision of the test. In BMS testing, it may be necessary to test batteries of different capacities. By setting multiple adjustable settings, the capacitor bank 400 can simulate different battery capacitance characteristics to meet various testing needs.
[0046] In this embodiment, the specific operation process of the BMS capacitive load test tool is as follows:
[0047] Connect the sampling harness of the BMS test module 300 to the battery under test 200. Connect the positive terminal of the battery under test 200 to the positive terminal of the capacitor bank 400. Connect the negative terminal of the battery under test 200 to the first terminal (B- terminal) of the BMS test module 300. Connect the negative terminal of the capacitor bank 400 to the second terminal (P- terminal) of the BMS test module 300. Connect the remaining harnesses of the BMS test module 300 (such as low-voltage switches and communication lines). Gradually increase the input circuit of the capacitor bank 400 from the low setting to gradually increase the capacitance in the circuit. Close the switch module 500. When the BMS test module 300 closes the MOS group in the discharge circuit 210, the battery under test 200 completes the pre-charge. If the BMS test module 300 fails to close the MOS group in the discharge circuit 210 or reports a pre-charge failure, short circuit, or other fault, the BMS test module 300 cannot complete the pre-charge task of the capacitive load of the battery under test 200. Disconnect the switch module 500, discharge the capacitor bank 400 through the discharge circuit 210, wait for the discharge indicator unit 220 to determine whether the capacitor bank 400 has finished discharging, repeat the above steps until the capacitive load capacity range of the battery under test 200 is determined, disconnect the main power supply, and disconnect the connecting harness after the capacitor bank 400 has been completely discharged.
[0048] In the description of this specification, references to terms such as "one embodiment," "further embodiment," "some specific embodiments," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A BMS capacitive load test tool, characterized in that, The utility model provides a kind of battery testing device, including: Shell; Battery to be measured, the battery to be measured is arranged in the shell interior; BMS test module, the BMS test module is arranged in the shell interior, and is connected with the battery to be measured; Capacitor group, the capacitor group is arranged in the shell interior, and the capacitor group is connected with the BMS test module and the battery to be measured respectively, and the capacitor group is used to power supply to the battery to be measured; Switch module, the switch module is arranged in the shell interior and is connected with the capacitor group, the BMS test module.
2. The BMS off-board test tool of claim 1, wherein, The battery to be measured is further connected with discharge circuit, and the discharge circuit is provided with a plurality of discharge resistors, and the plurality of discharge resistors are connected in series.
3. The BMS off-board test tool of claim 2, wherein, The battery to be measured is further connected with discharge indication unit, and the discharge indication unit is connected with the battery to be measured and the discharge circuit respectively.
4. The BMS off-board test tool of claim 1, wherein, The capacitor group is provided with first capacitor unit, second capacitor unit, third capacitor unit, fourth capacitor unit, fifth capacitor unit, sixth capacitor unit, seventh capacitor unit, eighth capacitor unit, ninth capacitor unit and tenth capacitor unit, and the switch module is provided with first air switch, second air switch, third air switch, fourth air switch, fifth air switch, sixth air switch, seventh air switch, eighth air switch, ninth air switch and tenth air switch, the first capacitor unit is connected with the first air switch, the second capacitor unit is connected with the second air switch, the third capacitor unit is connected with the third air switch, the fourth capacitor unit is connected with the fourth air switch, the fifth capacitor unit is connected with the fifth air switch, the sixth capacitor unit is connected with the sixth air switch, the seventh capacitor unit is connected with the seventh air switch, the eighth capacitor unit is connected with the eighth air switch, the ninth capacitor unit is connected with the ninth air switch, and the tenth capacitor unit is connected with the tenth air switch, wherein the switch module is further provided with total switch, and the current range of the first air switch, the second air switch, the third air switch, the fourth air switch, the fifth air switch, the sixth air switch, the seventh air switch, the eighth air switch, the ninth air switch and the tenth air switch increases in turn.
5. The BMS off-board test tool of claim 1, wherein, The shell includes front plate, back plate, left side plate, right side plate, top plate and bottom plate, the bottom plate is connected with the lower side of the front plate, the back plate, the left side plate and the right side plate respectively, and the top plate is connected with the upper side of the front plate, the back plate, the left side plate and the right side plate respectively.
6. The BMS off-board test tool of claim 1, wherein, The shell is further provided with partition plate, and the partition plate is used to divide the shell into first containing cavity and second containing cavity, the first containing cavity is used to place the battery to be measured, and the second containing cavity is used to place the BMS test module and the capacitor group.
7. The BMS capacitive load test tool of claim 6, wherein, The first containing cavity is provided with a plurality of first wiring holes, and the second containing cavity is provided with a plurality of first wiring grooves.
8. The BMS off-board test tool of claim 1, wherein, The capacitor group is further provided with a plurality of adjustment gears.