BMS safety test circuit
By designing a safety test circuit for BMS, using components such as reverse test and relay, the cumbersome and complex problems of BMS safety testing in the prior art are solved, and the rapid and efficient batch testing and safety of BMS are achieved. Sexual verification.
Patent Information
- Application Number
- CN202420712874.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-08
AI Technical Summary
The prior art tests for BMS safety are cumbersome and complex, and lacks efficient detection methods.
A BMS safety testing circuit is provided, which detects the safety of the BMS through reverse testing, including a first power supply module, a second power supply module and a control module, and uses a relay and a safety device to realize the switching and overcurrent protection of the circuit.
It realizes fast and efficient batch testing of BMS, simplifies the testing process, ensures the safety of BMS in reverse state, and avoids hazards to the circuit.
Smart Images
Figure CN222506519U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of power and energy storage technology, and in particular to a BMS safety test circuit. Background Art
[0002] BMS (Battery Management System) is a system for monitoring and managing lithium-ion battery packs. It monitors the use status of each battery cell in the lithium-ion battery pack in real time, coordinates the inconsistency of the battery through specific measures, and intelligently manages and maintains each battery cell, thereby improving the overall performance of the lithium-ion battery pack. Before the BMS is officially put into use, it needs to be fully tested and evaluated to ensure the safety and reliability of the BMS. Utility Model Content
[0003] The present application mainly provides a BMS safety test circuit to solve the current problem that BMS safety testing is relatively cumbersome and complicated.
[0004] In order to solve the above technical problems, a technical solution adopted by the present application is to provide a BMS safety test circuit for detecting the BMS to be tested, including:
[0005] A first power module, a positive electrode of which is electrically connected to the positive electrode of the BMS to be tested, and a negative electrode of which is electrically connected to the negative electrode of the BMS to be tested;
[0006] A second power module, the positive electrode of which is electrically connected to the negative electrode of the protection board of the BMS to be tested, and the negative electrode of which is electrically connected to the positive electrode of the BMS to be tested;
[0007] The control module is provided between the second power module and the BMS to be tested, and the control module is used to turn on or off the circuit between the second power module and the BMS to be tested.
[0008] In a possible implementation manner, the control module includes a relay, and the relay is used to switch on or off a circuit between the second power module and the BMS to be tested.
[0009] In a possible implementation manner, the relay is a 200V, 450A relay.
[0010] In a possible implementation manner, the voltage of the input circuit of the relay is 24V.
[0011] In a possible implementation manner, the control module includes a safety device, and the safety device is provided on a circuit between the second power module and the BMS to be tested.
[0012] In a possible implementation manner, the safety device is a fuse, and the fusing current of the fuse is 500A.
[0013] In a possible implementation, the first power module is a battery pack.
[0014] In a possible implementation manner, the battery pack specifications of the first power module are 48V and 100Ah.
[0015] In a possible implementation, the second power module is a battery pack.
[0016] In a possible implementation manner, the battery pack specifications of the second power module are 48V and 100Ah.
[0017] The beneficial effect of the present application is: different from the prior art, the present application discloses a BMS safety test circuit, which realizes the safety test of the BMS by reverse connection test, and has the beneficial effect of being simple and easy, and can realize batch testing of the BMS quickly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0019] Figure 1 Schematic diagram of the circuit structure of a BMS safety test circuit in one embodiment of the present application. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0021] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.
[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0023] BMS (Battery Management System) is a system for monitoring and managing lithium-ion battery packs. Safety testing is required before they are actually put into use. The main testing methods currently include the national standard GB31241-2022 Safety Technical Specification for Lithium-ion Batteries and Battery Packs for Portable Electronic Products, GB / T 36972-2018 Lithium-ion Batteries for Electric Bicycles, GB / T 36672-2018 Lithium-ion Batteries for Electric Motorcycles and Electric Mopeds. These standards involve BMS, but there is no clear test method for BMS.
[0024] In actual use, it is impossible to completely rule out the possibility that the user will reverse the positive and negative poles of the charging gun, which will generate high current and pose a safety hazard to the battery and BMS. Therefore, the BMS should have a reverse connection protection function to ensure that when the reverse connection occurs, it will not cause harm to all devices in the entire circuit and play a role in protecting the circuit.
[0025] In view of this, the present application proposes a BMS safety test circuit to provide a convenient and efficient detection method for a BMS system.
[0026] See also Figure 1 The embodiment of the present application provides a BMS safety test circuit for detecting a BMS to be tested, including:
[0027] A first power module, a positive electrode of which is electrically connected to a positive electrode of the BMS to be tested, and a negative electrode of which is electrically connected to a negative electrode of the BMS to be tested;
[0028] A second power module, the positive electrode of which is electrically connected to the negative electrode of the protection board of the BMS to be tested, and the negative electrode of which is electrically connected to the positive electrode of the BMS to be tested;
[0029] The control module is disposed between the second power module and the BMS to be tested, and is used to switch on or off the circuit between the second power module and the BMS to be tested.
[0030] Specifically, the BMS safety test circuit detects the BMS to be tested. The first power module is used to power the BMS to be tested. The second power module acts as a simulated charging gun, which is connected to the BMS to be tested in reverse connection and performs a charging test. The control module acts as a switch to turn on or off the circuit between the BMS to be tested and the second battery module. The BMS to be tested is equipped with a protection board.
[0031] During the test, the software can be used to control the module to conduct the circuit, so that the second power module can perform a reverse charging test on the BMS. During the test, people and other objects within a 3-meter radius need to be cleared to ensure a safe distance. At the same time, emergency plans such as fire extinguishing measures need to be prepared to deal with fire or battery damage.
[0032] The test content includes but is not limited to overcurrent protection test, charge and discharge test, and the test results are judged by checking the protection board data. Since the current is huge when the BMS is reversely connected, the overcurrent protection action should be triggered during the reverse connection test, including but not limited to fusing, circuit breaker tripping, etc. Multiple tests are performed at the same time to ensure that after the protection action, the BMS can still work normally after recording the reverse short circuit situation and reporting an error.
[0033] In one embodiment, the control module may include a relay, and the relay is used to turn on or off the circuit between the second power module and the BMS to be tested.
[0034] The relay acts as a switch to turn on or off the circuit between the second power module and the BMS to be tested. The relay can be controlled by other host computers (such as computers, mobile terminals, integrated terminals, etc.) or software.
[0035] In one embodiment, the relay may be a 200V, 450A relay.
[0036] In one embodiment, the voltage of the input circuit of the relay may be 24V.
[0037] In one embodiment, the control module includes a safety device, which is arranged on the circuit between the second power module and the BMS to be tested. Specifically, the safety device can be a fuse, which plays an overcurrent protection role on the circuit by melting at high temperature. During the reverse connection test, the current will surge, and the safety device will melt in time to protect the electronic components on the circuit.
[0038] In one embodiment, the safety device may be a fuse, and the fusing current of the fuse is 500A.
[0039] In one embodiment, the first power module is a battery pack, which serves to supply power to the BMS to be tested.
[0040] In one embodiment, the battery pack specification of the first power module is 48V, 100Ah.
[0041] In one embodiment, the second power module is a battery pack, which acts as a simulated charging gun and is used to perform a reverse connection test on the BMS to be tested.
[0042] In one embodiment, the battery pack of the second power module has a specification of 48V and 100Ah. Limiting the battery capacity can control the amount of electricity during reverse discharge, so that even if an accident occurs during the test, the scale of the accident can be controlled.
[0043] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A BMS safety test circuit, used to detect a BMS to be tested, characterized in that: include: A first power module, a positive electrode of which is electrically connected to the positive electrode of the BMS to be tested, and a negative electrode of which is electrically connected to the negative electrode of the BMS to be tested; A second power module, the positive electrode of which is electrically connected to the negative electrode of the protection board of the BMS to be tested, and the negative electrode of which is electrically connected to the positive electrode of the BMS to be tested; The control module is provided between the second power module and the BMS to be tested, and the control module is used to turn on or off the circuit between the second power module and the BMS to be tested.
2. The BMS safety test circuit according to claim 1, characterized in that: The control module includes a relay, and the relay is used to switch on or off the circuit between the second power module and the BMS to be tested.
3. The BMS safety test circuit according to claim 2, characterized in that: The relay is a 200V, 450A relay.
4. The BMS safety test circuit according to claim 2, characterized in that: The voltage of the input circuit of the relay is 24V.
5. The BMS safety test circuit according to claim 1, characterized in that: The control module includes a safety device, and the safety device is arranged on a circuit between the second power module and the BMS to be tested.
6. The BMS safety test circuit according to claim 5, characterized in that: The safety device is a fuse, and the fusing current of the fuse is 500A.
7. The BMS safety test circuit according to claim 1, characterized in that: The first power module is a battery pack.
8. The BMS safety test circuit according to claim 7, characterized in that: The battery pack specifications of the first power module are 48V, 100Ah.
9. The BMS safety test circuit according to claim 1, characterized in that: The second power module is a battery pack.
10. The BMS safety test circuit according to claim 9, characterized in that: The battery pack specifications of the second power module are 48V, 100Ah.