Device for detecting high-voltage interlocking loop in battery pack

Abstract

The utility model relates to the technical field of battery pack detection, in particular to a device for detecting a high-voltage interlocking loop in a battery pack. Comprising a short-circuit piece used for carrying out tool short-circuit on a power high-voltage port of a battery pack, a power supply module used for providing low-voltage electricity for the battery pack, a control module used for receiving a signal sent by a BMS in the battery pack and carrying out high-voltage interlocking state analysis, and a display module used for displaying the analyzed high-voltage interlocking state. The power supply module and the control module are electrically connected with a BMS in the battery pack, and the output end of the control module is connected with the input end of the display module. According to the scheme, the problems of low efficiency, low accuracy, complicated operation and poor compatibility in the prior art can be solved, so that the safety and the reliability of the battery pack are improved, and the detection cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack detection, and in particular to a device for detecting a high-voltage interlocking circuit inside a battery pack. Background Art

[0002] With the rapid development of electric vehicles and other new energy devices, the safety and reliability of battery packs have become critical factors. The high-voltage interlock circuit within the battery pack is a crucial component in ensuring the safe operation of the battery system. The high-voltage interlock circuit is designed to monitor the electrical connections within the battery pack to ensure that all connections are safe and reliable during normal operation and to quickly disconnect power in the event of a fault, preventing electrical hazards.

[0003] Although the high-voltage interlock circuit is crucial to the safety of the battery pack, the existing high-voltage interlock circuit detection methods still have some shortcomings, mainly including the following aspects:

[0004] 1. Traditional high-voltage interlock circuit testing typically relies on EOL equipment, a type of testing equipment specifically used at the end of the production line. This testing method is not only time-consuming but also occupies a large amount of production line resources, affecting overall production efficiency.

[0005] 2. Since high-voltage interlock circuit detection usually requires manual intervention, it is easily affected by human factors, which affects the accuracy of the detection results.

[0006] 3. Existing detection methods often require specialized technicians to operate and require complex equipment support, which increases the cost and difficulty of detection. Utility Model Content

[0007] The technical problem solved by the present invention is to provide a device for detecting the high-voltage interlocking circuit inside a battery pack, which can solve the problems of low efficiency, low accuracy and complex operation in the prior art and reduce the detection cost.

[0008] The basic solution provided by the utility model is: a device for detecting the high-voltage interlock circuit inside a battery pack, comprising a shorting piece for tooling short-circuiting the high-voltage power port of the battery pack, a power supply module for providing low-voltage electricity to the battery pack, a control module for receiving a signal from the BMS in the battery pack to analyze the high-voltage interlock status, and a display module for displaying the analyzed high-voltage interlock status;

[0009] The power supply module and the control module are electrically connected to the BMS in the battery pack respectively, and the output end of the control module is connected to the input end of the display module.

[0010] The principle and advantage of the present invention are: in this scheme, the power high-voltage port of the battery pack is first short-circuited by a short-circuit piece, so that the high-voltage interlocking circuit in the battery pack forms a loop, and then the power supply module provides low-voltage electricity to the battery pack. At this time, the BMS in the battery pack will be awakened by the power supply, and then a status self-check will be performed as soon as possible to check whether the high-voltage interlocking circuit is normal. After the self-check is completed, the BMS in the battery pack will send the self-check result to the control module, and the control module will analyze the signal sent to complete the analysis of the high-voltage interlocking status, and then the corresponding analyzed high-voltage interlocking status will be visualized by the display module, thereby achieving accurate and reliable judgment on whether the high-voltage interlocking circuit in the battery pack is normal.

[0011] In this solution, the method of using a shorting piece to directly short-circuit the power high-voltage port of the battery pack can quickly wake up the BMS in the battery pack, thereby accelerating the self-test process, shortening the test time, and thus improving the test efficiency. The signal corresponding to the high-voltage interlocking state sent by the BMS is parsed by the control module, and is intuitively displayed through the display module to ensure the accuracy of the high-voltage interlocking state. At the same time, the corresponding operation of this device is convenient. It only needs to be short-circuited through the shorting piece, and then the power supply module and the control module are connected to complete the preparation work before the test. There is no need for complicated settings or adjustments, which greatly reduces the difficulty of operation and simplifies the operation process. Moreover, this device can adapt to battery packs of different types and specifications, improves the compatibility of the device, and thus reduces the test cost, that is, solves the problems of low efficiency, low accuracy, complex operation and poor compatibility in the existing technology, so as to improve the safety and reliability of the battery pack and reduce the test cost.

[0012] Furthermore, the battery pack further comprises a housing, wherein the housing is provided with a battery pack mounting slot, wherein a shorting slot for a shorting piece is provided in the battery pack mounting slot, and both ends of the shorting piece extend out of the shorting slot;

[0013] The side wall of the housing is provided with a device mounting groove for the control module and the power supply module; the display module is embedded in the surface of the housing; the output end of the power supply module is connected to a first wire; the input end of the control module is connected to a second wire;

[0014] A first through hole for the first wire to extend into and a second through hole for the second wire to extend into are provided between the device installation slot and the battery pack installation slot.

[0015] Beneficial Effects: In this solution, the entire device is protected by the provision of a shell. The battery pack is placed in the battery pack installation slot and then docked with the shorting piece extending from the shorting slot, so that the two ends of the shorting piece are respectively connected to the power high-voltage port of the battery pack. Then, the first wire in the first through hole is connected to the BMS in the battery pack, and the second wire in the second through hole is connected to the BMS in the battery pack, thereby realizing electrical connection between the battery pack BMS and the power supply module and control module, thereby realizing rapid and convenient detection of the high-voltage interlocking status of the battery pack.

[0016] Furthermore, a first limiting disc is provided on one end of the first wire away from the power supply module, and a diameter of the first limiting disc is larger than a diameter of the first through hole;

[0017] A second limiting disc is provided on one end of the second wire away from the control module, and a diameter of the second limiting disc is larger than a diameter of the second through hole.

[0018] Beneficial effect: In this solution, the first limiting disc and the second limiting disc are set to limit the first wire and the second wire, effectively preventing the first wire and the second wire from falling off from the corresponding through holes, resulting in the stability and reliability of the electrical connection between the corresponding power supply module and the control module and the BMS. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a logical structure diagram of the device for detecting the high-voltage interlock circuit inside the battery pack in the first embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the device for detecting the high-voltage interlock circuit inside the battery pack in the first embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The symbols in the drawings of the specification include: housing 1, battery pack mounting slot 2, short circuit slot 3, first through hole 4, and second through hole 5.

[0023] The embodiment is basically as shown in the attached Figure 1 The figure shows: a device for detecting the high-voltage interlock circuit inside a battery pack, comprising a shorting piece for short-circuiting the high-voltage power port of the battery pack, a power supply module for providing low-voltage power to the battery pack, a control module for receiving a signal from the BMS in the battery pack to analyze the high-voltage interlock status, and a display module for displaying the analyzed high-voltage interlock status;

[0024] The power supply module and the control module are electrically connected to the BMS in the battery pack respectively, and the output end of the control module is connected to the input end of the display module.

[0025] like Figure 2 As shown, it also includes a housing 1, the housing 1 is provided with a battery pack mounting slot 2, the battery pack mounting slot 2 is provided with a shorting slot 3 for a shorting piece to be arranged, and both ends of the shorting piece extend out of the shorting slot 3;

[0026] The sidewalls of the housing 1 are provided with device mounting slots for mounting the control module and the power supply module. The display module is embedded in the surface of the housing 1. The output of the power supply module is connected to a first wire, and the input of the control module is connected to a second wire. A first through-hole 4 for the first wire and a second through-hole 5 for the second wire are defined between the device mounting slot and the battery pack mounting slot 2. In this embodiment, the signal emitted by the BMS after self-testing can take various forms, and the corresponding second wire varies depending on the form. For example, when the signal is transmitted as a CAN signal, the corresponding second wire is the CAN bus.

[0027] A first limiting disc is provided on one end of the first wire away from the power supply module. The diameter of the first limiting disc is larger than the diameter of the first through hole 4 . The first limiting disc is welded and fixed to the first wire.

[0028] A second limiting disc is provided on one end of the second wire away from the control module, and the diameter of the second limiting disc is larger than the diameter of the second through hole 5. The second limiting disc is welded and fixed to the second wire.

[0029] The control module can be a single chip microcomputer, a PLC or a host computer. In this embodiment, the control module adopts an STM32 series single chip microcomputer, specifically an STM32H7 high performance series single chip microcomputer. The display module is an OLED display.

[0030] First, place the battery pack into the battery pack installation slot 2, and then dock the battery pack with the short-circuit piece in the battery pack installation slot 2, so that the power high-voltage ports HVIL_IN and HVIL_OUT in the battery pack are short-circuited together through the short-circuit piece, and then connect the first wire and the second wire to the BMS of the battery pack to complete the preparation work for the corresponding battery pack high-voltage interlock circuit detection.

[0031] Then the BMS in the battery pack is powered by the power supply module, so that the BMS is awakened for self-test. At this time, after being awakened, the BMS can perform a self-test on the status of the high-voltage interlocking circuit to check whether the high-voltage interlocking circuit is normal. The self-test time is completed within 2 seconds. After the self-test is completed, the BMS will send the high-voltage interlocking status to the control module through the first wire in the form of a signal. After receiving the corresponding signal, the control module will parse the signal to complete the parsing of the high-voltage interlocking status and display it visually through the display module. At this time, the inspection personnel can check the display module to quickly and accurately judge whether the high-voltage interlocking circuit in the battery pack is normal.

[0032] The above are only embodiments of the present utility model. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for technicians in this field, without departing from the structure of the utility model, several variations and improvements can be made, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A device for detecting a high-voltage interlock circuit inside a battery pack, characterized in that: It includes a shorting piece for short-circuiting the high-voltage power port of the battery pack, a power supply module for providing low-voltage power to the battery pack, a control module for receiving signals from the BMS in the battery pack to analyze the high-voltage interlock status, and a display module for displaying the analyzed high-voltage interlock status; The power supply module and the control module are electrically connected to the BMS in the battery pack respectively, and the output end of the control module is connected to the input end of the display module.

2. The device for detecting a high-voltage interlock circuit in a battery pack according to claim 1, wherein: The battery pack further comprises a housing, wherein the housing is provided with a battery pack mounting slot, wherein a shorting slot for a shorting piece is provided in the battery pack mounting slot, and both ends of the shorting piece extend out of the shorting slot; The side wall of the housing is provided with a device mounting groove for the control module and the power supply module; the display module is embedded in the surface of the housing; the output end of the power supply module is connected to a first wire; the input end of the control module is connected to a second wire; A first through hole for the first wire to extend into and a second through hole for the second wire to extend into are provided between the device installation slot and the battery pack installation slot.

3. The device for detecting a high-voltage interlock circuit in a battery pack according to claim 2, wherein: A first limiting disc is provided on one end of the first wire away from the power supply module, and the diameter of the first limiting disc is larger than the diameter of the first through hole; A second limiting disc is provided on one end of the second wire away from the control module, and a diameter of the second limiting disc is larger than a diameter of the second through hole.

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