Battery cell connecting assembly and battery module

Abstract

The utility model provides a battery cell connecting assembly and a battery module, and the battery cell connecting assembly comprises an isolation substrate which is provided with a first pressure relief hole corresponding to an explosion-proof valve of a battery cell; the collection wire harness extends in the first direction; the plurality of wire harness brackets are arranged on the isolation substrate at intervals along the first direction; wherein the wire harness support is provided with a wire clamp structure used for limiting the collection wire harness, so that the collection wire harness can avoid the position of the first pressure relief hole. According to the embodiment of the utility model, the wire harness bracket with the wire clamp structure is arranged to limit the collected wire harness, so that the structure of the isolation board is simplified, and the processing difficulty of the isolation substrate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a cell connection component and a battery module. Background Technology

[0002] Cell contact systems (CCS) are an important component of battery modules in electric vehicles. They are used for connecting individual cells within a battery pack, connecting different battery packs, or connecting to external electrical components.

[0003] The battery cell connection assembly includes an isolation substrate, a bus, and a wiring harness, wherein the wiring harness is connected to the bus to collect voltage or temperature data of the battery cell. In related technologies, the isolation substrate is generally vacuum-formed, and in order to constrain the wiring harness, the isolation substrate is also integrally formed with corresponding wire clip structures, which makes the processing of the isolation substrate more difficult. Utility Model Content

[0004] The present invention provides a cell connection assembly and a battery module to at least partially solve the above-mentioned technical problems.

[0005] In a first aspect, embodiments of the present invention provide a cell connection assembly, comprising:

[0006] The isolation substrate has a first pressure relief hole corresponding to the explosion-proof valve of the battery cell;

[0007] The data acquisition harness extends along the first direction.

[0008] Multiple wire harness brackets are spaced apart on the isolation substrate along the first direction;

[0009] The wire harness bracket has a wire clip structure for limiting the position of the acquisition wire harness, so that the acquisition wire harness avoids the position of the first pressure relief hole.

[0010] Optionally, in some embodiments of this application, the isolation substrate has:

[0011] A wire channel extends along the first direction, and at least a portion of the wire harness bracket is disposed in the wire channel;

[0012] Wherein, in the projection plane perpendicular to the second direction, the projection of the wire harness bracket is inside the projection of the isolation substrate; the second direction is perpendicular to the first direction.

[0013] Optionally, in some embodiments of this application, the isolation substrate further comprises:

[0014] The installation space extends through the bottom surface of the cable tray in a third direction;

[0015] Wherein, at least a portion of the wire harness bracket is located within the installation space; the third direction is perpendicular to the first direction and the second direction.

[0016] Optionally, in some embodiments of this application, the wire harness bracket has:

[0017] The second pressure relief hole is provided through the second direction;

[0018] The isolation substrate is provided with a plurality of first pressure relief holes along a first direction, and the second pressure relief hole is located on the arrangement trajectory of the plurality of first pressure relief holes.

[0019] Optionally, in some embodiments of this application, the distance between two adjacent wire harness supports ranges from 150mm to 200mm.

[0020] Optionally, in some embodiments of this application, the wire harness bracket includes:

[0021] The fixing part is connected to the isolation substrate;

[0022] The fixing part has a first positioning structure, and the isolation substrate has a second positioning structure that cooperates with the first positioning structure.

[0023] Optionally, in some embodiments of this application, the cell connection assembly further includes:

[0024] Busbars are installed to the isolation substrate;

[0025] The isolation substrate further includes:

[0026] A positioning post, at least partially inserted through the busbar, is used to limit the movement of the busbar;

[0027] The second positioning structure includes the positioning post, and the first positioning structure includes a positioning hole through which the positioning post can pass.

[0028] Optionally, in some embodiments of this application, the isolation substrate has:

[0029] Mounting slot for mounting the busbar;

[0030] The fixing part extends at least partially into the mounting groove, and the fixing part is located between the busbar and the isolation substrate.

[0031] Optionally, in some embodiments of this application, the cell connection assembly further includes:

[0032] Output busbar, used for outputting electrical energy;

[0033] The output conductive bus includes a first conductive layer and a second conductive layer stacked together, wherein the conductivity of the second conductive layer is greater than that of the first conductive layer.

[0034] Optionally, in some embodiments of this application, the cell connection assembly further includes:

[0035] Busbars are installed to the isolation substrate;

[0036] The data acquisition harness includes:

[0037] The voltage acquisition line is soldered to the busbar via a connecting piece;

[0038] Hot melt adhesive is applied at the connection between the connecting piece and the busbar.

[0039] Secondly, embodiments of this utility model provide a battery module, including the cell connection assembly described above.

[0040] In the embodiments of this utility model, by setting a wire harness bracket with a wire clip structure, the acquisition wire harness is limited, thereby simplifying the structure of the isolation frame and reducing the processing difficulty of the isolation substrate. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a three-dimensional schematic diagram of the battery cell connection assembly provided in an embodiment of this utility model;

[0043] Figure 2 for Figure 1 Enlarged view of section A;

[0044] Figure 3 for Figure 1 Enlarged view of section B;

[0045] Figure 4 This is a top view of the battery cell connection assembly provided in an embodiment of this utility model;

[0046] Figure 5 This is an exploded view of the battery cell connection assembly provided in an embodiment of this utility model;

[0047] Figure 6 for Figure 5 Enlarged view of section C;

[0048] Figure 7 for Figure 5 Enlarged view of section D;

[0049] Figure 8 This is an exploded view showing the connection relationship between the isolation substrate, wire harness bracket and busbar in the battery cell connection assembly provided in an embodiment of this utility model;

[0050] Figure 9 This is a perspective view of the wire harness bracket in the battery cell connection assembly provided in an embodiment of this utility model;

[0051] Figure 10 This is a side view of the wire harness bracket in the battery cell connection assembly provided in an embodiment of this utility model.

[0052] Figure label:

[0053] 100. Cell connection assembly;

[0054] 110. Isolation substrate; 110a. First pressure relief hole; 110b. Cable guide groove; 110c. Mounting space; 111. Positioning post; 110d. Mounting groove; 110e. Cable guide opening; 112. Isolation section;

[0055] 120. Data acquisition harness; 121. Voltage acquisition line; 122. Temperature acquisition line;

[0056] 130. Wire harness bracket;

[0057] 130a, Second pressure relief hole; 131, Fixing part; 131a, Positioning hole;

[0058] 132. First gear position; 133. Second gear position; 130b. Limiting space; 130c. Wire passage gap; 130d. Wire clamping groove;

[0059] 141. Busbar; 142. Output busbar;

[0060] 150. Hot melt adhesive; 160. Wire harness clip; 170. Temperature sensor. Detailed Implementation

[0061] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model.

[0062] In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operating state, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative purposes and do not impose numerical requirements or establish a numerical order.

[0063] In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.

[0064] According to the first aspect of this utility model, referring to Figure 1 , Figure 2 and Figure 3 This application provides a battery cell connection assembly 100, including: an isolation substrate 110, a data acquisition harness 120, and a harness bracket 130.

[0065] The isolation substrate 110 has a first pressure relief hole 110a corresponding to the explosion-proof valve of the battery cell. The size of the first pressure relief hole 110a is greater than or equal to the size of the explosion-proof valve to facilitate pressure relief. A data acquisition harness 120 extends along a first direction. Multiple harness supports 130 are provided, spaced apart along the first direction on the isolation substrate 110. Each harness support 130 has a clamp structure for limiting the position of the data acquisition harness 120, ensuring that the data acquisition harness 120 avoids the position of the first pressure relief hole 110a. This prevents high-temperature gas from damaging the insulation layer of the data acquisition harness 120 and causing a short circuit when the explosion-proof valve of the battery cell is opened. Simultaneously, the clamp structure limits the height of the data acquisition harness 120, preventing interference with other structural components.

[0066] By adopting the above technical solution, the wire harness bracket 130 with a wire clip structure is set to limit the acquisition wire harness 120, thereby simplifying the structure of the isolation frame and reducing the processing difficulty of the isolation substrate 110.

[0067] The first direction mentioned here, indicating left and right, is only for the convenience of introducing specific embodiments of this application. There is no absolute correspondence between the first direction and the left and right directions. Similarly, there is no absolute correspondence between the second direction and the front and back directions, and between the third direction and the up and down directions. Furthermore, the first direction, second direction, and third direction of this application are only used to express relative positional relationships; they only indicate approximate locations, not absolute geometric relationships.

[0068] In some specific implementation methods, refer to Figure 2 and Figure 7 The data acquisition harness 120 includes voltage acquisition line 121 and temperature acquisition line 122, etc.

[0069] In some specific embodiments, the isolation substrate 110 is vacuum-formed, which can reduce the weight of the isolation substrate 110 and reduce mold costs. The isolation substrate 110 can be made of polycarbonate (PC), and the thickness of the isolation substrate 110 can range from 0.4-0.6 mm, more specifically, the thickness of the isolation substrate 110 can be 0.5 mm.

[0070] In some embodiments of this application, reference is made to Figure 1 , Figure 2 and Figures 4 to 6 The isolation substrate 110 has a wire passage groove 110b. The wire passage groove 110b extends along the first direction (left-right direction), and at least a portion of the wire harness bracket 130 is disposed in the wire passage groove 110b. In a projection plane perpendicular to the second direction (front-back direction), the projection of the wire harness bracket 130 is inside the projection of the isolation substrate 110; the second direction is perpendicular to the first direction.

[0071] By adopting this solution, the projection of the wire harness bracket 130 is placed inside the projection of the isolation substrate 110 through the wire groove 110b. That is, the wire harness bracket 130 does not exceed the boundary of the isolation substrate 110 in the vertical direction, thus avoiding the wire harness bracket 130 from affecting the overall thickness of the cell connection assembly 100.

[0072] In some embodiments of this application, reference is made to Figure 2 and Figure 6 The isolation substrate 110 further includes a mounting space 110c. The mounting space 110c extends through the bottom surface of the wire guide 110b along a third direction. At least a portion of the wire harness bracket 130 is located within the mounting space 110c; the third direction is perpendicular to the first direction and the second direction.

[0073] By adopting this scheme, the installation space 110c is set to ensure that the wire harness bracket 130 does not exceed the boundary of the isolation substrate 110 in the vertical direction, while increasing the thickness of the wire harness bracket 130 as much as possible, so that the wire harness bracket 130 can limit more acquisition wire harnesses 120.

[0074] In some embodiments of this application, reference is made to Figure 2 , Figure 4 and Figure 9The wire harness bracket 130 has a second pressure relief hole 130a. The second pressure relief hole 130a is disposed through the wire harness in a second direction. The isolation substrate 110 is provided with a plurality of first pressure relief holes 110a in a first direction, and the second pressure relief hole 130a is located on the arrangement trajectory of the plurality of first pressure relief holes 110a.

[0075] It is understandable that the first pressure relief hole 110a and the second pressure relief hole 130a are arranged sequentially in the left-right direction.

[0076] By adopting this solution, the second pressure relief hole 130a on the wire harness bracket 130 is provided to prevent the explosion-proof valve from being blocked by the wire harness bracket 130, thus facilitating the pressure relief of the battery cell.

[0077] In some embodiments of this application, the distance between two adjacent wire harness brackets 130 ranges from 150mm to 200mm.

[0078] By using these parameters, the number of wire harness brackets 130 can be reduced while effectively preventing the wire harness from arching, thereby reducing costs.

[0079] In some embodiments of this application, reference is made to Figures 8 to 10 The wire harness bracket 130 includes a fixing part 131, which is connected to the isolation substrate 110. The fixing part 131 has a first positioning structure, and the isolation substrate 110 has a second positioning structure that cooperates with the first positioning structure.

[0080] By adopting this scheme, the wiring harness bracket 130 is positioned and installed on the isolation substrate 110 through the cooperation of the first positioning structure and the second positioning structure.

[0081] In some specific implementations, the first positioning structure and the second positioning structure are engaged in one of the following ways: through a pinhole fit, a concave-convex fit, or a snap-fit ​​fit.

[0082] In some embodiments of this application, reference is made to Figure 1 , Figure 2 and Figure 5 The cell connection assembly 100 further includes a bus 141. The bus 141 is mounted to the isolation substrate 110.

[0083] It should be noted that the bus 141 is a series aluminum bus, and the bus 141 is connected to the battery cell by laser welding, thereby conducting current from multiple battery cells. The material of the bus 141 can be AL1060-O. The thickness of the bus 141 can range from 1.3 to 1.7 mm, and more specifically, the thickness of the bus 141 can be 1.5 mm.

[0084] Reference Figure 2, Figure 6 , Figure 8 and Figure 9 The isolation substrate 110 further includes a positioning post 111. At least a portion of the positioning post 111 passes through the busbar 141 to limit the busbar 141. The second positioning structure includes the positioning post 111, and the first positioning structure includes a positioning hole 131a through which the positioning post 111 passes.

[0085] This design uses positioning posts 111 to simultaneously position the busbar 141 and the wire harness bracket 130, facilitating assembly.

[0086] In some specific embodiments, the positioning post 111 can be a hot-riveted post to realize the connection between the busbar 141, the wire harness bracket 130 and the isolation substrate 110.

[0087] In some embodiments of this application, reference is made to Figure 2 , Figure 6 and Figure 8 The isolation substrate 110 has a mounting groove 110d. The mounting groove 110d is used to mount the bus 141 and to position the bus 141, and a positioning post 111 is disposed in the mounting groove 110d. At least a portion of the fixing part 131 extends into the mounting groove 110d, and the fixing part 131 is located between the bus 141 and the isolation substrate 110.

[0088] It should be noted that the bottom surface of the mounting groove 110d corresponding to the fixing part 131 is thinned to avoid the fixing part 131 affecting the flatness of the busbar 141.

[0089] In some embodiments of this application, reference is made to Figure 6 The isolation substrate 110 has a cable pass 110e. The cable pass 110e is connected between the mounting groove 110d and the cable pass groove 110b, so that the voltage acquisition line 121 can pass through the cable pass 110e and connect to the bus 141.

[0090] In some embodiments of this application, reference is made to Figure 6 The isolation substrate 110 further includes an isolation section 112, which is located between two adjacent mounting slots 110d in the first direction, thus isolating two adjacent busbars 141 in the first direction. The isolation section 112 increases the creepage distance between the two busbars 141.

[0091] In some embodiments of this application, reference is made to Figure 2 and Figure 9The wiring harness includes two clamp structures, with a second pressure relief hole 130a located between them. Each clamp structure includes a first stop portion 132 and a second stop portion 133. The first stop portion 132 and the second stop portion 133 form a limiting space 130b. The height of the limiting space 130b in the third direction can be determined based on the overall height of the acquisition wiring harness 120, and the width of the limiting space 130b in the second direction can be determined based on the number of rows of acquisition wiring harness 120 that need to pass through. A wire-passing gap 130c is also formed between the first stop portion 132 and the second stop portion 133. The wire-passing gap 130c communicates with the limiting space 130b, facilitating the acquisition wiring harness 120 to be inserted into the limiting space 130b.

[0092] In some embodiments of this application, the wire harness bracket 130 may be made of at least one of polycarbonate (PC) and ABS plastic (a terpolymer of acrylonitrile (A), butadiene (B), and styrene (S) monomers).

[0093] In some embodiments of this application, the wire harness bracket 130 is injection molded.

[0094] In some specific implementation methods, refer to Figure 2 The wire harnesses are wrapped with cloth tape.

[0095] In some other specific implementations, the data acquisition harness 120 can be laid out in one or two layers, eliminating the need to bundle the data acquisition harness 120 together, thus solving the problem of the data acquisition harness 120 being too tall and occupying too much height space.

[0096] In some embodiments of this application, reference is made to Figure 3 The battery cell connection assembly 100 further includes an output conductive bus 142. The output conductive bus 142 is used to output electrical energy. The output conductive bus 142 includes a first conductive layer and a second conductive layer stacked together, wherein the conductivity of the second conductive layer is greater than the conductivity of the first conductive layer.

[0097] With this approach, the output busbar 142 is constructed by stacking a first conductive layer and a second conductive layer. By using a second conductive layer with higher conductivity, the overall width of the output busbar 142 can be reduced while still meeting the power transmission requirements.

[0098] In some specific implementations, the material of the first conductive layer is the same as that of the bus 141.

[0099] In some specific embodiments, the output busbar 142 is a copper-aluminum composite busbar. Copper has high conductivity, and the copper-aluminum composite busbar is welded together by polymer diffusion welding, which can reduce the width of the output busbar 142 and increase the creepage distance with other electrical components. Furthermore, a layer of nickel sheet is adhered to the upper and lower surfaces of the output busbar 142 to prevent corrosion. Verification shows that in this embodiment, the width of the output busbar 142 is approximately one-quarter smaller than the width of the busbar 141.

[0100] In some embodiments of this application, reference is made to Figure 2 and Figure 7 The data acquisition harness 120 includes a voltage acquisition line 121. The voltage acquisition line 121 is soldered to the busbar 141 via a connecting piece; hot melt adhesive 150 is applied at the connection between the connecting piece and the busbar 141.

[0101] In some specific implementation methods, refer to Figure 2 and Figure 7 The connecting piece can be a nickel sheet. The voltage acquisition line 121 is ultrasonically welded to the stripped wire, nickel sheet, and busbar 141. The nickel sheet covers the stripped wire of the voltage acquisition line 121. Then, hot melt adhesive 150 is applied to the whole assembly. The hot melt adhesive 150 also covers a small section of the voltage acquisition line 121 to prevent the voltage acquisition line 121 from being pulled, contaminated, or corroded. Due to the high stability of the hot melt adhesive 150 and its resistance to high temperature and high humidity environments, the probability of failure is small throughout the entire life cycle of the cell connection assembly 100.

[0102] In some embodiments of this application, reference is made to Figure 2 , Figure 7 , Figure 9 and Figure 10 The data acquisition harness 120 further includes a temperature acquisition line 122. The temperature acquisition line 122 is connected to the temperature sensor 170 and is used to acquire the temperature information of the battery cell. The harness bracket 130 also has a wire-holding groove 130d, which is located at the bottom of the harness bracket 130. At least a portion of the temperature acquisition line 122 is embedded in the wire-holding groove 130d to limit the position of the temperature acquisition line 122.

[0103] In some embodiments of this application, reference is made to Figure 1 and Figure 3 The cell connection assembly 100 also includes a wire harness clip 160, which is used to fix the acquisition wire harness 120 outside the isolation substrate 110. Specifically, a wire harness clip 160 is provided on the acquisition wire harness 120 at intervals of 50-100mm.

[0104] The wire harness clip 160 can be made of at least one of polycarbonate (PC) and ABS plastic (a terpolymer of acrylonitrile (A), butadiene (B), and styrene (S) monomers). Furthermore, the wire harness clip 160 is injection molded.

[0105] According to a second aspect of the present invention, an embodiment of the present invention also provides a battery module, including the cell connection assembly 100 as described above. This battery module possesses all the beneficial effects of the cell connection assembly 100 described above, which will not be repeated here.

[0106] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cell connection assembly (100), characterized in that, include: The isolation substrate (110) has a first pressure relief hole (110a) corresponding to the explosion-proof valve of the battery cell; A data acquisition harness (120) is provided, extending along the first direction; Multiple wire harness brackets (130) are spaced apart on the isolation substrate (110) along the first direction; The wire harness bracket (130) has a wire clip structure for limiting the position of the acquisition wire harness (120) so that the acquisition wire harness (120) avoids the position of the first pressure relief hole (110a).

2. The cell connection assembly (100) according to claim 1, characterized in that, The isolation substrate (110) has: A wire channel (110b) is provided extending along the first direction, and at least a portion of the wire harness bracket (130) is provided in the wire channel (110b); In the projection plane perpendicular to the second direction, the projection of the wire harness bracket (130) is inside the projection of the isolation substrate (110); the second direction is perpendicular to the first direction.

3. The cell connection assembly (100) according to claim 2, characterized in that, The isolation substrate (110) also has: The installation space (110c) extends through the bottom surface of the cable tray (110b) in a third direction; Wherein, at least a portion of the wire harness bracket (130) is located within the mounting space (110c); the third direction is perpendicular to the first direction and the second direction.

4. The cell connection assembly (100) according to claim 3, characterized in that, The wire harness bracket (130) has: The second pressure relief hole (130a) is provided through the second direction; The isolation substrate (110) is provided with a plurality of first pressure relief holes (110a) along a first direction, and the second pressure relief hole (130a) is located on the arrangement trajectory of the plurality of first pressure relief holes (110a).

5. The cell connection assembly (100) according to claim 1, characterized in that, The distance between two adjacent wire harness brackets (130) ranges from 150mm to 200mm.

6. The cell connection assembly (100) according to any one of claims 1 to 5, characterized in that, The wire harness bracket (130) includes: A fixing part (131) is connected to the isolation substrate (110); The fixing part (131) has a first positioning structure, and the isolation substrate (110) has a second positioning structure that cooperates with the first positioning structure.

7. The cell connection assembly (100) according to claim 6, characterized in that, The cell connection assembly (100) further includes: Busbar (141) is installed to the isolation substrate (110); The isolation substrate (110) further includes: A positioning post (111) is at least partially inserted through the busbar (141) to limit the busbar (141); The second positioning structure includes the positioning post (111), and the first positioning structure includes a positioning hole (131a) through which the positioning post (111) can pass.

8. The cell connection assembly (100) according to claim 7, characterized in that, The isolation substrate (110) has: Mounting slot (110d) for mounting the busbar (141); At least a portion of the fixing part (131) extends into the mounting groove (110d), and the fixing part (131) is located between the busbar (141) and the isolation substrate (110).

9. The cell connection assembly (100) according to any one of claims 1 to 5, characterized in that, The cell connection assembly (100) further includes: Output bus (142) is used to output electrical energy; The output conductive bus (142) includes a first conductive layer and a second conductive layer stacked together, wherein the conductivity of the second conductive layer is greater than that of the first conductive layer.

10. The cell connection assembly (100) according to any one of claims 1 to 5, characterized in that, The cell connection assembly (100) further includes: Busbar (141) is installed to the isolation substrate (110); The data acquisition harness (120) includes: The voltage acquisition line (121) is welded to the busbar (141) via a connecting piece; Hot melt adhesive (150) is provided at the connection between the connecting piece and the busbar (141).

11. A battery module, characterized in that, Includes the cell connection assembly (100) as described in any one of claims 1 to 10.

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