Battery signal acquisition device and battery module

Abstract

The present application discloses a battery signal acquisition device and a battery module. The battery signal acquisition device comprises a mounting seat, a BMS, and wire harnesses, and further comprises a pin header assembly. The pin header assembly comprises a pin header base and pin headers. One of the mounting seat and the pin header base is provided with positioning rods, and the other of the mounting seat and the pin header base is provided with positioning holes. The positioning rods are inserted into the positioning holes. A gap is provided between the outer wall of each positioning rod and the inner wall of the corresponding positioning hole. The pin headers are arranged on the pin header base. The pin headers are configured to be simultaneously electrically connected to the BMS and the wire harnesses.

Description

Battery signal acquisition device and battery module

[0001] This application claims priority to Chinese Patent Application No. 2024221406936, filed with the Chinese Patent Office on August 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery module technology, and in particular to battery signal acquisition devices and battery modules. Background Technology

[0003] The battery signal acquisition device is used to detect and monitor the voltage and temperature of the battery cells in real time, and transmits the acquired signals to the BMS (Battery Management System) to realize overcurrent protection and thermal runaway management of the battery module. Technical issues

[0004] Traditional battery signal acquisition devices typically include board-side connectors for connecting to the BMS and wire-side connectors for connecting to the wiring harness. The board-side connectors and wire-side connectors are interlocked to achieve connection. However, since both board-side connectors and wire-side connectors require corresponding structures for fixed installation, this solution results in connectors occupying a large amount of space, and connectors often interfere with other components due to space constraints. Technical solutions

[0005] In a first aspect, this application provides a battery signal acquisition device, including a mounting base and a pin header assembly, the pin header assembly comprising:

[0006] A pin header bracket, wherein one of the mounting base and the pin header bracket is provided with a positioning post, and the other has a positioning hole, wherein the positioning post is inserted into the positioning hole, and there is a gap between the outer wall of the positioning post and the inner wall of the positioning hole;

[0007] A pin header is disposed on the pin header bracket, and the pin header is configured to be electrically connected to both the BMS and the wiring harness.

[0008] Secondly, this application provides a battery module, including the aforementioned battery signal acquisition device, and also including a battery cell, wherein the battery cell is connected to the battery signal acquisition device. Beneficial effects

[0009] The beneficial effects provided by this application are as follows: This application provides a battery signal acquisition device, including a mounting base and a pin header assembly. The pin header assembly includes a pin header bracket and pins. One of the mounting base and the pin header bracket is provided with a positioning post, and the other has a positioning hole. The positioning post is inserted into the positioning hole, thereby allowing the pins to be installed on the mounting base via the pin header bracket. The installation structure is simple and space-saving. There is a gap between the outer wall of the positioning post and the inner wall of the positioning hole, which can absorb the machining errors between the mounting base and the pin header bracket, ensuring that the positioning post can be inserted into the positioning hole. The pins are set on the pin header bracket and are configured to be electrically connected to both the BMS and the wiring harness to realize the acquisition and transmission of battery cell signals. Thus, the pin header assembly can both connect the wiring harness and the BMS and be installed on the mounting base. The structure is simple and easy to assemble.

[0010] This application also provides a battery module, including the aforementioned battery signal acquisition device, and a battery cell. The battery cell is connected to the battery signal acquisition device, and the pin header of the battery signal acquisition device electrically connects the wiring harness to the BMS to realize the acquisition and transmission of battery cell signals. In addition, the connection method of inserting the positioning post into the positioning hole eliminates the connector in the traditional solution, and the pin header is installed on the mounting base through the pin header bracket. The installation structure is simple and saves space. There is a gap between the outer wall of the positioning post and the inner wall of the positioning hole, which can absorb the processing error between the mounting base and the pin header bracket, ensuring that the positioning post can be inserted into the positioning hole. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the battery signal acquisition device in an embodiment of this application;

[0012] Figure 2 is an enlarged view of point A in Figure 1;

[0013] Figure 3 is a top view of the battery signal acquisition device in an embodiment of this application;

[0014] Figure 4 is an enlarged view of point B in Figure 3;

[0015] Figure 5 is a schematic diagram of the structure of the pin header assembly in an embodiment of this application;

[0016] Figure 6 is a schematic diagram of the pin header structure in an embodiment of this application.

[0017] In the picture:

[0018] 100. Mounting base; 101. Mounting slot; 110. Positioning post;

[0019] 200. Pin header assembly; 210. Pin header bracket; 211. Positioning hole; 220. Pin header; 221. First connecting part; 222. Second connecting part; 223. Transition section;

[0020] 300. Wiring harness.

[0021] Implementation methods of this application

[0022] The battery signal acquisition device is configured to detect and monitor the voltage and temperature of the battery cells in real time, and transmit the acquired signals to the BMS to achieve overcurrent protection and thermal runaway management of the battery module. Traditional battery signal acquisition devices typically have board-end connectors for connecting to the BMS and wire-end connectors for connecting the wiring harness. The board-end connectors and wire-end connectors are plugged into each other to achieve the connection. However, in this solution, the connectors occupy a lot of space, and the connectors often interfere with other components due to space constraints.

[0023] In response to the above situation, this embodiment provides a battery signal acquisition device to solve the problem of large space occupation caused by the use of connectors between the BMS and the wiring harness in related technologies. It can be used in the field of battery module technology.

[0024] Referring to Figures 1-6, the battery signal acquisition device includes a mounting base 100, a BMS, and a wiring harness 300, as well as a pin header assembly 200. The pin header assembly 200 includes a pin header bracket 210 and pins 220. One of the mounting base 100 and the pin header bracket 210 is provided with a positioning post 110, and the other has a positioning hole 211. The positioning post 110 is inserted into the positioning hole 211, so that the pins 220 are installed on the mounting base 100 through the pin header bracket 210. The installation structure is simple and saves space. There is a gap between the outer wall of the positioning post 110 and the inner wall of the positioning hole 211, which can absorb the machining error between the mounting base 100 and the pin header bracket 210 and ensure that the positioning post 110 can be inserted into the positioning hole 211. The pin header 220 is configured to be electrically connected to both the BMS and the wiring harness 300 simultaneously to achieve the acquisition and transmission of battery cell signals. This allows the pin header assembly 200 to both connect the wiring harness 300 and the BMS and be mounted on the mounting base 100. The structure is simple and easy to assemble.

[0025] This embodiment exemplifies a scheme in which the positioning post 110 is disposed on the mounting base 100 and the positioning hole 211 is formed in the pin header bracket 210. After the positioning post 110 and the positioning hole 211 are connected, the outer wall of the positioning post 110 and the inner wall of the positioning hole 211 are fixed by hot riveting. To facilitate the hot riveting operation while absorbing machining errors between the mounting base 100 and the pin header bracket 210, exemplarily, in this embodiment, the gap between the outer wall of the positioning post 110 and the inner wall of the positioning hole 211 is 0.2 mm.

[0026] Referring again to Figures 1-6, the mounting base 100 is positioned spaced apart from the BMS. In this embodiment, the mounting base 100 and the BMS are parallel and spaced apart. The pin header bracket 210 is located between the mounting base 100 and the BMS; the positioning post 110 is disposed on the mounting base 100, and the positioning hole 211 is formed in the pin header bracket 210. There is a gap between the positioning post 110 and the BMS, thereby absorbing errors during processing and assembly between the mounting base 100 and the BMS.

[0027] Referring again to Figures 1-6, the pin header 220 has a first connecting portion 221 and a second connecting portion 222. The first connecting portion 221 is configured to be electrically connected to the BMS, and the second connecting portion 222 is configured to be electrically connected to the wire harness 300, thereby electrically connecting the BMS and the wire harness 300. The pin header 220 also includes a transition section 223 located between the first connecting portion 221 and the second connecting portion 222. The transition section 223 is embedded in the pin header bracket 210. The connection between the pin header 220 and the pin header bracket 210 is achieved by the transition section 223 being embedded in the pin header bracket 210, which enables the pin header 220 to be stably positioned on the pin header bracket 210.

[0028] The pin header 220 is made of metal, and the pin header bracket 210 is made of plastic. The pin header bracket 210 and the pin header 220 are integrally formed. Specifically, they can be integrally formed by injection molding process of pre-embedded parts so that the transition section 223 is embedded in the pin header bracket 210.

[0029] Referring again to Figures 1-6, the extension direction of the first connecting portion 221 is perpendicular to the surface of the BMS, facilitating the insertion of the first connecting portion 221 into the mounting hole of the BMS to complete the electrical connection between the first connecting portion 221 and the BMS. The extension direction of the second connecting portion 222 is parallel to the surface of the mounting base 100, facilitating the electrical connection between the wire harness mounted on the surface of the mounting base 100 and the second connecting portion 222. Furthermore, to accommodate the extension directions of the first connecting portion 221 and the second connecting portion 222, the transition section 223 is curved or L-shaped, allowing it to be stably embedded in the pin header bracket 210. Since the surface of the mounting base 100 is parallel to and spaced apart from the surface of the BMS, the extension direction of the first connecting portion 221 is perpendicular to the extension direction of the second connecting portion 222.

[0030] Referring again to Figures 1-6, multiple pin headers 220 are provided. The first connecting portions 221 of the multiple pin headers 220 are arranged in parallel and spaced apart to facilitate simultaneous connection of the first connecting portions 221 of the multiple pin headers 220 to the BMS. The second connecting portions 222 of any two adjacent pin headers 220 are located on both sides of the pin header bracket 210, which increases the size of a single second connecting portion 222 and facilitates the connection between each second connecting portion 222 and different wire harnesses 300.

[0031] Referring again to Figures 1-6, the mounting base 100 has a mounting groove 101, and the second connecting part 222 of the pin header 220 is disposed in the mounting groove 101, thereby limiting the second connecting part 222 of the pin header 220 by the groove wall of the mounting groove 101.

[0032] The outer wall of the second connecting part 222 has a gap with the inner wall of the mounting groove 101 to absorb machining and installation errors.

[0033] Multiple mounting slots 101 are provided, and the number of mounting slots 101 is the same as the number of pin headers 220. The second connecting portions 222 of the multiple pin headers 220 are correspondingly arranged in the multiple mounting slots 101. In other embodiments, the number of mounting slots 101 may be less than the number of second connecting portions 222, and only some of the second connecting portions 222 may be arranged in the mounting slots 101. Since the pin headers 220 and the pin header bracket 210 are fixed as a whole, limiting only some of the second connecting portions 222 can also serve to limit the overall pin header assembly 200.

[0034] Referring to Figures 1-6, the first connecting part 221 is soldered to the BMS, and the first connecting part 221 has a tin plating layer to ensure the connection strength between the first connecting part 221 and the BMS, and the solderability of the first connecting part 221 and the BMS is ensured by local electroplating.

[0035] Referring to Figures 1-6, the second connecting part 222 is welded to the wire harness 300. During installation, the high temperature of the soldering process can cause thermal deformation of the pin header plastic bracket. To address this, structural adhesive is applied to the weld joint between the second connecting part 222 and the wire harness 300. The structural adhesive connects both the wire harness 300 and the second connecting part 222, thus protecting the weld joint. Specifically, the structural adhesive can be applied to the surface of the second connecting part 222 using an adhesive dispensing process, and the structural adhesive is connected to the wire harness 300.

[0036] This embodiment also provides a battery module, including the aforementioned battery signal acquisition device, and a battery cell. The battery cell is connected to the battery signal acquisition device. The pin header 220 of the battery signal acquisition device electrically connects the wiring harness 300 to the BMS to realize the acquisition and transmission of battery cell signals. In addition, the connection method of inserting the positioning post 110 into the positioning hole 211 eliminates the connector in the traditional solution, saving space. There is a gap between the outer wall of the positioning post 110 and the inner wall of the positioning hole 211, which can absorb the processing error between the mounting base 100 and the pin header bracket 210, ensuring that the positioning post 110 can be inserted into the positioning hole 211.

Claims

1. A battery signal acquisition device, comprising a mounting base (100) and a pin header assembly (200), wherein the pin header assembly (200) comprises: The pin header bracket (210) is provided with a positioning post (110) on one of the mounting base (100) and the pin header bracket (210), and the other has a positioning hole (211). The positioning post (110) is inserted into the positioning hole (211), and there is a gap between the outer wall of the positioning post (110) and the inner wall of the positioning hole (211). A pin header (220) is disposed on the pin header bracket (210), and the pin header (220) is configured to be electrically connected to both the BMS and the wiring harness (300).

2. The battery signal acquisition device according to claim 1, wherein, The mounting base (100) is configured to be spaced apart from the BMS, and the pin header bracket (210) is located between the mounting base (100) and the BMS; the positioning post (110) is disposed on the mounting base (100), the positioning hole (211) is opened in the pin header bracket (210), and there is a gap between the positioning post (110) and the BMS.

3. The battery signal acquisition device according to claim 1, wherein, The pin header (220) has a first connecting portion (221) and a second connecting portion (222), the first connecting portion (221) being electrically connected to the BMS and the second connecting portion (222) being electrically connected to the wire harness (300); the pin header (220) further includes a transition section (223) located between the first connecting portion (221) and the second connecting portion (222), the transition section (223) being embedded in the pin header bracket (210).

4. The battery signal acquisition device according to claim 3, wherein, The pin header bracket (210) and the pin header (220) are integrally formed by injection molding through pre-embedded parts.

5. The battery signal acquisition device according to claim 3, wherein, The first connecting part (221) extends perpendicularly to the surface of the BMS, and the second connecting part (222) extends parallel to the surface of the mounting base (100).

6. The battery signal acquisition device according to claim 5, wherein, The pin headers (220) are provided in multiple ways. The first connecting parts (221) of the multiple pin headers (220) are arranged in parallel and spaced apart. The second connecting parts (222) of any two adjacent pin headers (220) are located on both sides of the pin header bracket (210).

7. The battery signal acquisition device according to claim 3, wherein, The mounting base (100) has a mounting groove (101), and the second connecting part (222) of the pin header (220) is disposed in the mounting groove (101).

8. The battery signal acquisition device according to any one of claims 3-7, wherein, The first connection portion (221) is welded to the BMS, and the first connection portion (221) has a tin plating layer.

9. The battery signal acquisition device according to any one of claims 3-7, wherein, The second connecting part (222) is welded to the wire harness (300), and structural adhesive is provided at the welding point between the second connecting part (222) and the wire harness (300), the structural adhesive connecting the wire harness (300) and the second connecting part (222).

10. A battery module, comprising the battery signal acquisition device as described in any one of claims 1-9, and further comprising a battery cell connected to the battery signal acquisition device.

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