Battery signal acquisition device and battery module

Abstract

The utility model belongs to the technical field of battery modules, and discloses a battery signal acquisition device and a battery module, the battery signal acquisition device comprises a mounting seat, a BMS and a wire harness, the battery signal acquisition device also comprises a pin header assembly, the pin header assembly comprises a pin header support and a pin header, one of the mounting seat and the pin header support is provided with a positioning column, and the other one is provided with a positioning hole. The positioning columns are inserted into the positioning holes, and gaps are formed between the outer walls of the positioning columns and the inner walls of the positioning holes, so that machining errors between the mounting base and the pin header support can be absorbed, and it is ensured that the positioning columns can be inserted into the positioning holes. The pin header is arranged on the pin header support, the pin header is used for being electrically connected with the BMS and the wire harness at the same time so as to achieve collection and transmission of electrical core signals, and therefore the pin header assembly can play a role in connecting the wire harness and the BMS and can also play a role in being installed on the installation base, the structure is simple, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a battery signal acquisition device and a battery module. Background Art

[0002] The battery signal acquisition device is used to detect and monitor the voltage and temperature of battery cells in real time, and transmit the acquired signals to the BMS (Battery Management System), so as to realize overcurrent protection and temperature thermal runaway management of the battery module.

[0003] In traditional battery signal acquisition devices, a board-end connector connected to the BMS and a wire-end connector of a wire harness are usually provided, and the board-end connector and the wire-end connector are inserted into each other to achieve connection. However, since both the board-end connector and the wire-end connector need to be fixedly installed with corresponding structures, this solution requires a large space for the connectors, and the connectors often interfere with other components due to space problems. Summary of the Utility Model

[0004] According to one aspect of the utility model, the utility model provides a battery signal acquisition device to solve the problem of large space occupation caused by the solution of inserting connectors between the BMS and the wire harness in the prior art.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The battery signal acquisition device includes a mounting seat and a pin header assembly. The pin header assembly includes:

[0007] A pin header bracket, one of the mounting seat 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, and there is a gap between the outer wall of the positioning post and the inner wall of the positioning hole;

[0008] Pin headers, which are arranged on the pin header bracket and are used to be electrically connected to the BMS and the wire harness simultaneously.

[0009] As a preferred solution of the battery signal acquisition device, the mounting seat is used to be arranged at an interval from the BMS, and the pin header bracket is located between the mounting seat and the BMS; the positioning post is arranged on the mounting seat, the positioning hole is opened on the pin header bracket, and there is a gap between the positioning post and the BMS.

[0010] As a preferred solution of the battery signal acquisition device, the pin header has a first connection part and a second connection part, the first connection part is used to electrically connect to the BMS, and the second connection part is used to electrically connect to the wiring harness; the pin header also includes a transition section located between the first connection part and the second connection part, and the transition section is embedded in the pin header bracket.

[0011] As a preferred solution of the battery signal acquisition device, the pin header bracket and the pin header are integrally formed by injection molding of embedded parts.

[0012] As a preferred solution of the battery signal acquisition device, the extending direction of the first connecting portion is perpendicular to the surface of the BMS, and the extending direction of the second connecting portion is parallel to the surface of the mounting base.

[0013] As a preferred solution of the battery signal acquisition device, a plurality of pin headers are provided, the first connecting portions of the plurality of pin headers are arranged in parallel and at intervals, and the second connecting portions of any two adjacent pin headers are respectively located on both sides of the pin header bracket.

[0014] As a preferred solution of the battery signal acquisition device, the mounting seat has a mounting groove, and the second connecting portion of the pin header is arranged in the mounting groove.

[0015] As a preferred solution of the battery signal acquisition device, the first connecting portion is welded to the BMS, and the first connecting portion has a tin-plated layer.

[0016] As a preferred solution of the battery signal acquisition device, the second connecting portion is welded to the wiring harness, and a structural adhesive is provided at the welding point between the second connecting portion and the wiring harness, and the structural adhesive simultaneously connects the wiring harness and the second connecting portion.

[0017] According to another aspect of the present invention, a battery module is provided, comprising the above-mentioned battery signal acquisition device and a battery cell, wherein the battery cell is connected to the battery signal acquisition device.

[0018] The beneficial effects of the utility model are:

[0019] The present utility model provides a battery signal acquisition device, which includes a mounting base and a pin header assembly. The pin header assembly includes a pin header bracket and pin headers. One of the mounting base and the pin header bracket is provided with positioning posts, and the other has positioning holes. The positioning posts are inserted into the positioning holes, so that the pin headers are installed on the mounting base through 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, so that the machining errors between the mounting base and the pin header bracket can be absorbed, ensuring that the positioning posts can be inserted into the positioning holes. The pin headers are arranged on the pin header bracket and are used to be electrically connected to the BMS and the wire harness at the same time to realize the acquisition and transmission of the cell signals. Thus, the pin header assembly can not only play the role of connecting the wire harness and the BMS, but also play the role of being installed on the mounting base, with a simple structure and convenient assembly.

[0020] The present utility model also provides a battery module, which includes the above battery signal acquisition device and also includes cells. The cells are connected to the battery signal acquisition device. The pin headers of the battery signal acquisition device electrically connect the wire harness and the BMS to realize the acquisition and transmission of the cell signals. In addition, the connection method of inserting the positioning posts into the positioning holes omits the connectors in the traditional solution, and the pin headers are installed on the mounting base through 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 posts can be inserted into the positioning holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the battery signal acquisition device in an embodiment of the present utility model;

[0022] Figure 2 is Figure 1 an enlarged view of part A in

[0023] Figure 3 is a top view schematic diagram of the battery signal acquisition device in an embodiment of the present utility model;

[0024] Figure 4 is Figure 3 an enlarged view of part B in

[0025] Figure 5 is a schematic structural diagram of the pin header assembly in an embodiment of the present utility model;

[0026] Figure 6 is a schematic structural diagram of the pin header in an embodiment of the present utility model.

[0027] In the figure:

[0028] 100, mounting base; 101, mounting groove; 110, positioning post;

[0029] 200. Pin header assembly; 210. Pin header bracket; 211. Positioning hole; 220. Pin header; 221. First connecting portion; 222. Second connecting portion; 223. Transition section;

[0030] 300. Wiring harness. Detailed implementation mode

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top", and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom", and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0034] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0035] The battery signal acquisition device is used 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 temperature thermal runaway management of the battery module. In traditional battery signal acquisition devices, a board-end connector connected to the BMS and a wire-end connector for the wire harness are usually provided, and the board-end connector and the wire-end connector are plugged together to achieve connection. However, in this solution, the connector occupies a large space, and the connector often interferes with other components due to space problems.

[0036] In view of the above problems, this embodiment provides a battery signal acquisition device to solve the problem of large space occupation caused by the prior art solution of plugging connectors between the BMS and the wire harness, and it can be used in the technical field of battery modules.

[0037] Referring to Figures 1 - 6 , the battery signal acquisition device includes a mounting base 100, a BMS, and a wire harness 300, and further includes a pin header assembly 200. The pin header assembly 200 includes a pin header bracket 210 and pin headers 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 pin headers 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, so that the machining error between the mounting base 100 and the pin header bracket 210 can be absorbed, ensuring that the positioning post 110 can be inserted into the positioning hole 211. The pin headers 220 are used to be electrically connected to the BMS and the wire harness 300 at the same time to realize the acquisition and transmission of the battery cell signals. Thus, the pin header assembly 200 can not only connect the wire harness 300 and the BMS, but also play the role of being installed on the mounting base 100. The structure is simple and convenient for assembly.

[0038] In this embodiment, an exemplary solution is given where the positioning post 110 is provided on the mounting base 100 and the positioning hole 211 is opened on the pin header bracket 210. Optionally, after the positioning post 110 is inserted into the positioning hole 211, the outer wall of the positioning post 110 and the inner wall of the positioning hole 211 are fixed by hot riveting. On the premise of being able to absorb the machining error between the mounting base 100 and the pin header bracket 210, for the convenience of hot riveting operation, 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.

[0039] Continuing to refer to Figures 1 - 6, the mounting base 100 is used to be spaced apart from the BMS. In this embodiment, the mounting base 100 is parallel and spaced apart from the BMS. The pin header bracket 210 is located between the mounting base 100 and the BMS; the positioning post 110 is provided on the mounting base 100, and the positioning hole 211 is opened on the pin header bracket 210. There is a gap between the positioning post 110 and the BMS, so as to absorb the errors during processing and assembly between the mounting base 100 and the BMS.

[0040] Continue to refer to Figures 1 - 6 , the pin header 220 has a first connection portion 221 and a second connection portion 222. The first connection portion 221 is used to be electrically connected to the BMS, and the second connection portion 222 is used to be electrically connected to the wire harness 300, so as to electrically connect the BMS and the wire harness 300. The pin header 220 further includes a transition section 223 located between the first connection portion 221 and the second connection portion 222. The transition section 223 is embedded in the pin header bracket 210. By embedding the transition section 223 in the pin header bracket 210, the connection between the pin header 220 and the pin header bracket 210 can be realized, and the pin header 220 can be stably arranged on the pin header bracket 210.

[0041] Optionally, the pin header 220 is made of a metal material, and the pin header bracket 210 is made of a plastic material. The pin header bracket 210 and the pin header 220 are integrally formed, specifically by an embedded injection molding process, so that the transition section 223 is embedded in the pin header bracket 210.

[0042] Continue to refer to Figures 1 - 6 , the extending direction of the first connection portion 221 is perpendicular to the surface of the BMS, so as to facilitate the insertion of the first connection portion 221 into the mounting hole of the BMS to complete the electrical connection between the first connection portion 221 and the BMS; the extending direction of the second connection portion 222 is parallel to the surface of the mounting base 100, so as to facilitate the electrical connection between the wire harness mounted on the surface of the mounting base 100 and the second connection portion 222. In addition, in order to adapt to the extending directions of the first connection portion 221 and the second connection portion 222, the transition section 223 is bent in an arc shape or in an L shape, so that the transition section 223 can be stably embedded into the pin header bracket 210. Since the surface of the mounting base 100 is parallel and spaced apart from the surface of the BMS, the extending direction of the first connection portion 221 is perpendicular to the extending direction of the second connection portion 222.

[0043] Continue to refer to Figures 1 - 6 , a plurality of pin headers 220 are provided. The first connection portions 221 of the plurality of pin headers 220 are parallel and spaced apart, so as to facilitate the simultaneous connection of the first connection portions 221 of the plurality of pin headers 220 to the BMS. The second connection portions 222 of any two adjacent pin headers 220 are respectively located on both sides of the pin header bracket 210, so that the size of a single second connection portion 222 can be increased, which is convenient for the connection between each second connection portion 222 and different wire harnesses 300.

[0044] Continue to refer to Figures 1 - 6 , the mounting base 100 has a mounting groove 101, and the second connecting portion 222 of the pin 220 is disposed in the mounting groove 101, so as to limit the second connecting portion 222 of the pin 220 through the groove wall of the mounting groove 101.

[0045] Optionally, there is a gap between the outer side wall of the second connecting portion 222 and the inner wall of the mounting groove 101 to absorb machining and installation errors.

[0046] Optionally, a plurality of mounting grooves 101 are provided, and the number of the mounting grooves 101 is the same as the number of the pins 220. The second connecting portions 222 of the plurality of pins 220 are correspondingly disposed in the plurality of mounting grooves 101. In other embodiments, the number of the mounting grooves 101 may also be less than the number of the second connecting portions 222, and only some of the second connecting portions 222 are disposed in the mounting grooves 101. Since the pins 220 and the pin support 210 are integrally fixed, limiting only some of the second connecting portions 222 can also play a role in limiting the entire pin assembly 200.

[0047] Continue to refer to Figures 1 - 6 , the first connecting portion 221 is welded to the BMS, and the first connecting portion 221 has a tin plating layer to ensure the connection strength between the first connecting portion 221 and the BMS, and to ensure the weldability of the first connecting portion 221 and the BMS by local electroplating tin.

[0048] Continue to refer to Figures 1 - 6 , the second connecting portion 222 is welded to the wire harness 300. During the installation process, the high temperature of the soldering process will cause thermal deformation of the pin plastic bracket. To this end, a structural adhesive is provided at the welding joint of the second connecting portion 222 and the wire harness 300. The structural adhesive connects the wire harness 300 and the second connecting portion 222 at the same time to protect the welding point through the structural adhesive. Specifically, the structural adhesive can be disposed on the surface of the second connecting portion 222 through a dispensing process, and the structural adhesive is connected to the wire harness 300.

[0049] This embodiment further provides a battery module, including the above battery signal acquisition device, and further including a battery cell. The battery cell is connected to the battery signal acquisition device. The pins 220 of the battery signal acquisition device electrically connect the wire harness 300 and the BMS to realize the acquisition and transmission of the battery cell signals. In addition, the connector in the traditional solution is omitted by the connection method of inserting the positioning post 110 into the positioning hole 211, 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 machining error between the mounting base 100 and the pin support 210, and ensure that the positioning post 110 can be inserted into the positioning hole 211.

[0050] Obviously, the above-mentioned embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Battery signal acquisition device, characterized in that, It includes a mounting base (100) and a pin header assembly (200), and the pin header assembly (200) includes: A pin header bracket (210), one of the mounting base (100) and the pin header bracket (210) is provided with a positioning post (110), 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); Pin headers (220), arranged on the pin header bracket (210), and the pin headers (220) are used for electrically connecting to the BMS and the wire harness (300) simultaneously.

2. The battery signal acquisition device according to claim 1, wherein The mounting base (100) is used to be arranged at an interval from the BMS, and the pin header bracket (210) is located between the mounting base (100) and the BMS; the positioning post (110) is arranged on the mounting base (100), the positioning hole (211) is opened on 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, characterized in that The pin header (220) has a first connection part (221) and a second connection part (222), the first connection part (221) is used for electrically connecting to the BMS, and the second connection part (222) is used for electrically connecting to the wire harness (300); the pin header (220) further includes a transition section (223) located between the first connection part (221) and the second connection part (222), and the transition section (223) is embedded in the pin header bracket (210).

4. The battery signal acquisition device according to claim 3, characterized in that The pin header bracket (210) and the pin header (220) are integrally formed by insert molding.

5. The battery signal acquisition device according to claim 3, characterized in that, The extending direction of the first connection part (221) is perpendicular to the surface of the BMS, and the extending direction of the second connection part (222) is parallel to the surface of the mounting base (100).

6. The battery signal acquisition device according to claim 5, wherein, A plurality of pin headers (220) are provided, the first connection parts (221) of the plurality of pin headers (220) are arranged in parallel and at intervals, and the second connection parts (222) of any two adjacent pin headers (220) are respectively 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 connection part (222) of the pin header (220) is arranged in the mounting groove (101).

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

9. The battery signal acquisition device according to any one of claims 3-7, characterized in that The second connection part (222) is welded to the wire harness (300), and a structural adhesive is provided at the welding part of the second connection part (222) and the wire harness (300), and the structural adhesive connects the wire harness (300) and the second connection part (222) simultaneously.

10. Battery module, characterized in that, It includes the battery signal acquisition device according to any one of claims 1-9, and further includes a battery cell, and the battery cell is connected to the battery signal acquisition device.

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