Busbar support assembly and battery module

Abstract

The utility model provides a busbar support assembly and a battery module. The busbar support assembly comprises a plurality of busbar assemblies arranged side by side and a module sampling assembly, each busbar assembly comprises a busbar bracket, a plurality of busbars and an insulating sheet, the plurality of busbars are arranged on the busbar bracket at intervals, the insulating sheet is used for protecting the top end edge of the battery stack body, and the insulating sheet is connected with the busbar bracket and each busbar; the module sampling assembly comprises a circuit board arranged on one side of the busbar assembly, and a plurality of connecting pieces on the circuit board are electrically connected with the busbars in a one-to-one correspondence mode. According to the busbar support assembly provided by the utility model, the plurality of busbar assemblies are arranged side by side, and a split busbar support structure is formed, so that the development cost and period of a mold can be reduced, and the breakage of a product caused by insufficient rigidity due to overlength of the product can be prevented, thereby ensuring the quality and the manufacturing yield of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a busbar bracket assembly. The utility model also relates to a battery module provided with the busbar bracket assembly. Background Art

[0002] Most of the existing power battery module connection bus bracket assemblies are one part. The bus bracket is generally connected to the bus and the module sampling component by riveting, clamping, or gluing to form a bus bracket assembly, and then the stacked cells are welded to the bus and the pole to form a battery module, and then a power battery is formed to provide energy for the whole vehicle.

[0003] At present, the length of conventional busbar brackets is usually less than 1 meter, which cannot better match the longer battery cell stack. The research and development of longer busbar brackets makes the mold development cost high and the cycle long. In addition, the longer busbar bracket is too long, and its rigidity is difficult to guarantee, which easily leads to breakage. Utility Model Content

[0004] In view of this, the utility model aims to provide a busbar bracket assembly, so as to reduce the mold development cost and cycle, and prevent the product from being broken due to excessive length and insufficient rigidity.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A busbar support assembly includes a plurality of busbar assemblies arranged side by side, and a module sampling assembly;

[0007] Each of the busbar assemblies comprises a busbar support, a plurality of busbars and an insulating sheet, wherein the plurality of busbars are arranged at intervals on the busbar support, the insulating sheet is used to protect the top edge of the battery stack, and the insulating sheet is connected to the busbar support and each of the busbars;

[0008] The module sampling component includes a circuit board arranged on one side of the bus bar component, and a plurality of connecting pieces on the circuit board are electrically connected to a plurality of the bus bars in a one-to-one correspondence.

[0009] Furthermore, the busbar bracket is provided with a positioning portion for positioning each of the busbars.

[0010] Furthermore, the insulating sheet, the busbar support and each of the busbars are connected together by heat riveting.

[0011] Furthermore, the busbar bracket is provided with a rivet column, the insulating sheet and each of the busbars are respectively provided with a first rivet hole and a second rivet hole, and the rivet column passes through the first rivet hole and the second rivet hole in sequence.

[0012] Furthermore, a mounting portion is provided on the bus bracket; the module sampling assembly also includes a temperature sampling component provided on the circuit board, and the temperature sampling component is provided on the mounting portion.

[0013] Furthermore, the installation portion includes an installation frame; the temperature sampling component is located in the installation frame, and the return frame in the temperature sampling component is bonded and connected to the installation frame.

[0014] Furthermore, the mounting portion includes two vertical plates arranged at intervals, and at least one of the vertical plates is provided with a snap-on protrusion; the temperature sampling component is located between the two vertical plates, and the snap-on protrusion can be snapped on the return frame in the temperature sampling component.

[0015] Furthermore, the mounting portion includes a limiting member having a mounting cavity, the limiting member is provided with a guide portion for guiding the temperature sampling member to slide into the mounting cavity, and the limiting member can be pressed against a return frame in the temperature sampling member.

[0016] Furthermore, a riveted portion is provided at one end of the circuit board having the low-voltage interface, and the riveted portion is riveted to the module end plate.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The bus bracket assembly described in the utility model is provided with a plurality of bus assemblies arranged side by side, each of which is provided with a bus bracket, a plurality of bus bars and an insulating sheet, wherein the insulating sheet can protect the top edge of the battery stack, and the arrangement of the plurality of bus assemblies also forms a split bus bracket structure, which can help reduce the mold development cost and cycle, prevent the product from being broken due to excessive length and insufficient rigidity, thereby ensuring product quality and manufacturing yield.

[0019] In addition, the positioning part provided on the busbar support can facilitate the positioning of each busbar on the busbar support. The insulation sheet is connected to the busbar support and each busbar by heat riveting, which has the characteristics of simple structure and convenient design and implementation, and can also ensure the reliability of the connection between the insulation sheet and each busbar and the busbar support. The plug-in matching of the riveting column and the riveting hole has the characteristics of simple structure and convenient processing and manufacturing.

[0020] In addition, the mounting portion on the bus bracket is conducive to the installation and fixation of the temperature sampling component in the module sampling assembly. The mounting portion adopts a mounting frame, and the return frame in the temperature sampling component is bonded and connected to the mounting frame, which can better ensure the fixing effect of the temperature sampling component and facilitate the effective collection of the battery cell temperature. The mounting portion adopts two vertical plates, and the return frame is clamped by the clamping protrusions set on the vertical plates, which can also better ensure the fixing effect of the temperature sampling component. The mounting portion adopts a limiter, and the limiter is pressed against the return frame, which can also better fix and stabilize the sampling component. The riveted portion provided can facilitate the fixation of the end of the circuit board with the low-voltage interface to the module end plate.

[0021] Another object of the present invention is to provide a battery module, in which the above-mentioned busbar bracket assembly is provided.

[0022] The battery module of the present invention and the busbar bracket assembly as described above have the same beneficial effects as those of the prior art, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 It is a structural schematic diagram of the busbar support assembly according to an embodiment of the utility model from a first perspective;

[0025] Figure 2 A schematic structural diagram of the busbar support assembly according to an embodiment of the utility model from a second viewing angle;

[0026] Figure 3 An exploded view of the busbar support assembly according to an embodiment of the utility model;

[0027] Figure 4 for Figure 2 A magnified view of part A in FIG.

[0028] Figure 5 It is a structural schematic diagram of the busbar assembly according to an embodiment of the utility model;

[0029] Figure 6 An exploded view of the busbar assembly according to an embodiment of the utility model;

[0030] Figure 7 This is a schematic structural diagram of a busbar support according to an embodiment of the utility model;

[0031] Figure 8 A structural schematic diagram of a first fixing method of the temperature sampling member according to an embodiment of the utility model;

[0032] Fig. 9 A structural schematic diagram of a second fixing method of the temperature sampling member according to an embodiment of the utility model;

[0033] Fig.10 A schematic diagram of the structure of a third fixing method of the temperature sampling member according to an embodiment of the present utility model;

[0034] Fig.11 A schematic diagram of the structure of the battery module according to an embodiment of the present utility model;

[0035] Description of reference numerals:

[0036] 1. Busbar assembly; 2. Circuit board; 4. Double-sided tape; 5. Structural adhesive; 6. Expansion rivets;

[0037] 11. Bus bracket; 12. Bus; 13. Insulating sheet; 110. Hollow hole; 111. Riveted column; 112. Positioning block; 113. Mounting portion; 121. Second riveted hole; 131. First riveted hole; 113a. Vertical plate; 113b. Limiting piece; 1131. Snap-on protrusion; 1132. Guide portion; 20. Connecting piece; 21. Low-voltage interface; 31. Aluminum substrate; 32. Thermistor; 33. Retractable frame; 34. Thermally conductive silicone pad; 10. Bus bracket assembly; 100. Cell stack; 200. Module end plate. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0039] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] Embodiment 1

[0043] The present embodiment relates to a busbar bracket assembly 10, which is beneficial to reducing mold development costs and cycles, and preventing product breakage caused by excessive length and insufficient rigidity, thereby ensuring product quality and manufacturing yield.

[0044] In terms of overall structure, the busbar support assembly 10 of this embodiment is as follows: Figures 1 to 4 As shown, the busbar support assembly 10 includes a plurality of busbar assemblies 1 arranged side by side, and a module sampling assembly.

[0045] Each busbar assembly 1 includes a busbar support 11, a plurality of busbars 12 and an insulating sheet 13. The plurality of busbars 12 are arranged on the busbar support 11 at intervals. The insulating sheet 13 is used to protect the top edge of the battery stack, and the insulating sheet 13 is connected to the busbar support 11 and each busbar 12. The module sampling assembly includes a circuit board 2 disposed on one side of the busbar assembly 1, and a plurality of connecting sheets 20 on the circuit board 2 are electrically connected to the plurality of busbars 12 one by one.

[0046] At this time, in each bus assembly 1, the bus bracket 11, multiple bus bars 12 and insulating sheet 13 are connected into an assembly, which is beneficial to the assembly of the bus assembly 1 on the battery cell stack 100. Multiple bus assemblies 1 are arranged side by side to form a split bus bracket 11 structure, so that the length of each bus bracket 11 is not too long, which is beneficial to achieving versatility and reducing mold development costs and cycles, and preventing insufficient rigidity and product breakage due to excessive product length, thereby ensuring product quality and manufacturing yield.

[0047] It should be noted that the circuit board 2 may preferably be a FPC flexible circuit board 2, and the insulating sheet 13 may preferably be made of PC. In addition, the connecting sheet 20 on the circuit board 2, i.e., the nickel sheet, is connected to the bus 12 by laser welding, so that the nickel sheet and the bus 12 are electrically connected.

[0048] For more details, see Figures 5 to 7As shown, in this embodiment, in order to facilitate the positioning of each busbar 12, a positioning portion for positioning each busbar 12 is provided on the busbar bracket 11. Specifically, as Figure 6 and Figure 7 As shown, a plurality of hollow holes 110 are formed on the busbar support 11 corresponding to each busbar 12. The positioning portion includes two positioning end faces formed by opposite side walls forming the hollow holes 110, and a positioning block 112 located at the bottom of the hollow holes 110. Both sides and the bottom of each busbar 12 are positioned on the busbar support 11 through the two positioning end faces and the positioning block 112, respectively.

[0049] As a preferred implementation, in this embodiment, the insulating sheet 13 is connected to the busbar support 11 and each busbar 12 by heat riveting. The insulating sheet 13 is connected to the busbar support 11 and each busbar 12 by heat riveting, which has the characteristics of simple structure and easy design and implementation, and can also ensure the reliability of the connection between the insulating sheet 13, each busbar 12 and the busbar support 11.

[0050] Continue to view Figures 5 to 7 The insulating sheet 13 has a main body located above the battery stack, and a connecting end connected to the main body. The connecting end extends toward one side of the main body, and the insulating sheet 13 is connected to the busbar bracket 11 through the connecting end. Specifically, a plurality of rivet columns 111 are arranged at intervals on the busbar bracket 11, and a first rivet hole 131 and a second rivet hole 121 are respectively provided on the insulating sheet 13 and each busbar 12, and the rivet column 111 passes through the first rivet hole 131 and the second rivet hole 121 in sequence. By heating the rivet column 111 to deform it and block the second rivet hole 121, the busbar bracket 11, the insulating sheet 13 and the plurality of busbars 12 are connected to form a busbar assembly 1. At this time, the structural form of the busbar assembly 1 also facilitates the assembly of the busbar bracket assembly 10 on the battery cell stack 100.

[0051] In this embodiment, the bus bracket 11 is provided with a mounting portion 113, and the module sampling assembly further includes a temperature sampling component provided on the circuit board 2, and the temperature sampling component is provided on the mounting portion 113. The provision of the mounting portion 113 is conducive to the installation and fixation of the temperature sampling component.

[0052] The temperature sampling component includes an aluminum substrate 31 connected to the circuit board 2, and a thermistor 32 and a circular frame 33 connected to one side of the aluminum substrate 31. The aluminum substrate 31 is bonded to the surface of the battery cell, and the temperature of the battery cell is collected by collecting the temperature of the aluminum substrate 31. The circular frame is used to support and protect the thermistor 32, and the circular frame is filled with waterproof sealant for sealing to prevent the thermistor 32 from being short-circuited by water.

[0053] As a preferred implementation method, Figure 8As shown, in this embodiment, the mounting portion 113 disposed on the busbar bracket 11 specifically includes a mounting frame, the temperature sampling component is located in the mounting frame, and the return frame 33 in the temperature sampling component is bonded and connected to the mounting frame, so as to better ensure the fixing effect of the temperature sampling component and facilitate the effective collection of the battery cell temperature. In specific implementation, the outer wall of the return frame 33 is bonded and fixed to the inner wall of the mounting frame by a structural adhesive 5.

[0054] Similarly, as a preferred implementation, Fig. 9 As shown, in this embodiment, the mounting portion 113 can be formed of two vertical plates 113a arranged at intervals, and at least one of the vertical plates 113a is provided with a snap-on protrusion 1131. The temperature sampling component is located between the two vertical plates 113a, and the snap-on protrusion 1131 can be snapped on the return frame 33 in the temperature sampling component. In specific implementation, a thermally conductive silicone pad 34 is provided at the bottom of the aluminum substrate 31 in the temperature sampling component, and the thermally conductive silicone pad 34 is bonded and connected to the aluminum substrate 31 through a double-sided adhesive 4. During assembly, the thermally conductive silicone pad 34 abuts against the battery cell, and the snap-on protrusion 1131 is clamped on the upper end surface of the return frame 33, so that the temperature sampling component can be better fixed between the bus bracket 11 and the battery cell shell to ensure an effective collection effect, wherein the deformation of the thermally conductive silicone pad 34 can ensure good contact between the temperature sampling component and the battery cell shell.

[0055] In addition, as a preferred implementation, Fig.10 As shown, the mounting portion 113 may also adopt a stopper 113b having a mounting cavity, and the stopper 113b is provided with a guide portion 1132 for guiding the temperature sampling member to slide into the mounting cavity, and the stopper 113b can be pressed against the return frame 33 in the temperature sampling member. In specific implementation, a thermally conductive silicone pad 34 is also provided at the bottom of the temperature sampling member, that is, a thermally conductive silicone pad 34 is bonded to the bottom of the aluminum substrate 31 in the temperature sampling member. The temperature sampling member slides into the mounting cavity of the stopper. At this time, under the action of the thermally conductive silicone pad 34, the stopper can be pressed against the return frame 33, thereby better fixing the temperature sampling member between the bus bracket 11 and the battery cell housing, ensuring good contact between the temperature sampling member and the battery cell housing.

[0056] It should be noted that the fixing method of the temperature sampling component of this embodiment can be flexibly selected according to actual needs, and it can effectively fix the temperature sampling component to ensure that the thermistor 32 effectively collects the battery core temperature.

[0057] In addition, in this embodiment, a riveted portion is provided at one end of the circuit board 2 having the low-voltage interface 21, and the riveted portion is riveted to the module end plate 200. The riveted portion is specifically, for example, a riveting hole, and the circuit board 2 is fixed to the module end plate 200 by a rivet passed through the riveting hole.

[0058] The busbar bracket assembly 10 of this embodiment can not only help reduce mold development costs and cycles, but also prevent the occurrence of insufficient rigidity and product breakage due to the busbar bracket 11 being too long, thereby ensuring product quality and manufacturing yield.

[0059] Embodiment 2

[0060] This embodiment relates to a battery module, in which the busbar support assembly 10 of the first embodiment is provided.

[0061] like Fig.11 As shown, the battery cell stack 100 in the battery module is formed by stacking a plurality of battery cells, and the positive pole and the negative pole of each battery cell are arranged on the two side end surfaces of each battery cell, and the positive pole and the negative pole are arranged alternately in sequence. At this time, the busbar support assembly 10 of the first embodiment is provided on both sides of the battery cell stack 100.

[0062] In addition, the battery module also includes two module end plates 200, which are arranged at intervals along the stacking direction of the battery cell stack 100. A part of the circuit board 2 in the bus bracket assembly 10 is fixed on the battery cell stack 100, and the other part, that is, the part with the low-voltage interface 21, is fixed to the corresponding module end plate 200 by expansion rivets 6.

[0063] The battery module of this embodiment uses the busbar bracket assembly 10 of the first embodiment, which is beneficial to reducing mold development costs and cycles, and can also ensure product quality and manufacturing yield, and has a good use effect.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A busbar support assembly, characterized in that: It includes a plurality of busbar assemblies arranged side by side, and a module sampling assembly; Each of the busbar assemblies comprises a busbar support, a plurality of busbars and an insulating sheet, wherein the plurality of busbars are arranged at intervals on the busbar support, the insulating sheet is used to protect the top edge of the battery stack, and the insulating sheet is connected to the busbar support and each of the busbars; The module sampling component includes a circuit board arranged on one side of the bus bar component, and a plurality of connecting pieces on the circuit board are electrically connected to a plurality of the bus bars in a one-to-one correspondence.

2. The busbar support assembly according to claim 1, characterized in that: The busbar bracket is provided with a positioning portion for positioning each of the busbars.

3. The busbar support assembly according to claim 1, characterized in that: The insulating sheet, the busbar support and each of the busbars are connected together by heat riveting.

4. The busbar support assembly according to claim 3, characterized in that: The busbar bracket is provided with a riveting column, the insulating sheet and each of the busbars are respectively provided with a first riveting hole and a second riveting hole, and the riveting column passes through the first riveting hole and the second riveting hole in sequence.

5. The busbar support assembly according to claim 1, characterized in that: The busbar bracket is provided with a mounting portion; The module sampling component also includes a temperature sampling component arranged on the circuit board, and the temperature sampling component is arranged on the mounting portion.

6. The busbar support assembly according to claim 5, characterized in that: The mounting portion includes a mounting frame; The temperature sampling component is located in the installation frame, and the return frame in the temperature sampling component is bonded and connected to the installation frame.

7. The busbar support assembly according to claim 5, characterized in that: The mounting portion comprises two vertical plates arranged at intervals, and at least one of the vertical plates is provided with a clamping protrusion; The temperature sampling component is located between the two vertical plates, and the clamping protrusion can be clamped on the return frame in the temperature sampling component.

8. The busbar support assembly according to claim 5, characterized in that: The mounting portion includes a limiting member having a mounting cavity, the limiting member is provided with a guide portion for guiding the temperature sampling member to slide into the mounting cavity, and the limiting member can be pressed against a return frame in the temperature sampling member.

9. The busbar support assembly according to any one of claims 1 to 8, characterized in that: One end of the circuit board having the low-voltage interface is provided with a riveted portion, and the riveted portion is riveted to the module end plate.

10. A battery module, characterized in that: The battery module is provided with a busbar bracket assembly according to any one of claims 1 to 9.

Images