Battery cell connection assembly, battery module, and vehicle

Abstract

The present application provides a battery cell connection assembly, a battery module, and a vehicle. The battery module comprises the battery cell connection assembly, wherein the battery cell connection assembly comprises: an isolation substrate, a collection wire harness, and a plurality of wire harness holders. The isolation substrate is provided with first pressure relief holes corresponding to explosion-proof valves of battery cells; the collection wire harness extends in a first direction; and the plurality of wire harness holders are mounted on the isolation substrate at intervals in the first direction. The wire harness holders are provided with wire clamp structures configured to limit the collection wire harness, so that the collection wire harness avoids the first pressure relief holes.

Description

Cell connection components, battery modules and vehicles

[0001] This application claims priority to Chinese Patent Application No. 202520138269.X, filed with the Chinese Patent Office on January 20, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of battery technology, specifically to a cell connection component, a battery module, and a vehicle. Background Technology

[0003] Cell contact systems (CCS) are an important component of battery modules in electric vehicles. They are used to connect multiple cells within a battery pack, as well as to connect the battery pack to external electrical components.

[0004] The 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 cell. Invention Overview

[0005] However, the isolation substrate is generally vacuum-formed, and in order to constrain the wire harness, the isolation substrate is also integrally formed with a corresponding wire clip structure, which makes the processing of the isolation substrate more difficult.

[0006] This application provides a cell connection assembly that simplifies the structure of the isolation substrate and reduces the processing difficulty of the isolation substrate.

[0007] In a first aspect, embodiments of this application provide a battery cell connection assembly. The battery cell connection assembly includes:

[0008] The isolation substrate has a first pressure relief hole corresponding to the explosion-proof valve of the battery cell;

[0009] The acquisition harness is set to extend along the first direction; and

[0010] Multiple wire harness brackets are spaced apart on the isolation substrate along a first direction;

[0011] The wire harness bracket has a wire clip structure configured to limit the position of the acquisition wire harness so that the acquisition wire harness avoids the position of the first pressure relief hole.

[0012] Secondly, this application also provides a battery module. The battery module includes the aforementioned cell connection assembly.

[0013] Thirdly, this application also provides a vehicle. The vehicle includes the aforementioned battery module. Beneficial effects

[0014] The battery cell connection assembly provided in this application simplifies the structure of the isolation substrate and reduces the processing difficulty of the isolation substrate by setting a wire harness bracket with a wire clamp structure to limit the position of the acquisition wire harness.

[0015] The battery module provided in this application includes the aforementioned cell connection assembly. By setting a wire harness bracket with a wire clip structure, the acquisition wire harness is limited, thereby simplifying the structure of the isolation substrate and reducing the processing difficulty of the isolation substrate.

[0016] The vehicle provided in this application includes the aforementioned battery module. By setting a wire harness bracket with a wire clip structure, the acquisition wire harness is limited, thereby simplifying the structure of the isolation substrate and reducing the processing difficulty of the isolation substrate. Attached Figure Description

[0017] Figure 1 is a perspective view of the cell connection assembly provided in an embodiment of this application.

[0018] Figure 2 is an enlarged view of part A in Figure 1.

[0019] Figure 3 is an enlarged view of part B in Figure 1.

[0020] Figure 4 is a top view of the cell connection assembly provided in an embodiment of this application.

[0021] Figure 5 is an exploded view of the cell connection assembly provided in an embodiment of this application.

[0022] Figure 6 is an enlarged view of part C in Figure 5.

[0023] Figure 7 is an enlarged view of part D in Figure 5.

[0024] Figure 8 is an exploded view showing the connection relationship between the isolation substrate, wire harness bracket and bus in the cell connection assembly provided in the embodiment of this application.

[0025] Figure 9 is a perspective view of the wire harness bracket in the battery cell connection assembly provided in the embodiment of this application.

[0026] Figure 10 is a side view of the wire harness bracket in the battery cell connection assembly provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Cell connection assembly; 110. Isolation substrate; 110a. First pressure relief hole; 110b. Wire passage groove; 110c. Mounting space; 111. Positioning post; 110d. Mounting groove; 110e. Wire passage opening; 112. Isolation part; 120. Data acquisition harness; 121. Voltage acquisition line; 122. Temperature acquisition line; 130. Wire harness bracket; 130a. Second pressure relief hole; 131. Fixing part; 131a. Positioning hole; 132. First stop part; 133. Second stop part; 130b. Limiting space; 130c. Wire passage gap; 130d. Wire clamping groove; 141. Busbar; 142. Output conductive busbar; 150. Hot melt adhesive; 160. Wire harness clip; 170. Temperature sensor. Embodiments of the present invention

[0029] Example 1

[0030] This embodiment provides a battery cell connection assembly 100, including: an isolation substrate 110, a data acquisition harness 120, and a harness bracket 130.

[0031] Referring to Figures 1, 2, and 3, 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 configured to limit the position of the data acquisition harness 120, preventing the data acquisition harness 120 from avoiding 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.

[0032] 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 substrate and reducing the processing difficulty of the isolation substrate 110.

[0033] The first direction indicated here, referring to left and right, is merely for the convenience of describing the 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 indicate approximate orientations, not absolute geometric relationships.

[0034] In some possible implementations, referring to Figures 2 and 7, the acquisition harness 120 includes voltage acquisition line 121 and temperature acquisition line 122, etc.

[0035] In some possible implementations, 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 ranges from 0.4 mm to 0.6 mm.

[0036] In some possible implementations, the thickness of the isolation substrate 110 may be 0.5 mm.

[0037] In some embodiments of this application, referring to FIGS. 1, 2, and 4 to 6, the isolation substrate 110 has a wire passage groove 110b. The wire passage groove 110b extends along a first direction (left-right direction), and at least a portion of the wire harness support 130 is disposed in the wire passage groove 110b. In a projection plane perpendicular to a second direction (front-back direction), the projection of the wire harness support 130 is inside the projection of the isolation substrate 110; the second direction is perpendicular to the first direction.

[0038] By setting the through groove 110b, the projection of the wire harness bracket 130 is inside the projection of the isolation substrate 110. That is, the wire harness bracket 130 does not exceed the boundary of the isolation substrate 110 in the vertical direction, thus avoiding the setting of the wire harness bracket 130 from affecting the overall thickness of the cell connection assembly 100.

[0039] In some embodiments of this application, referring to Figures 2 and 6, the isolation substrate 110 further includes a mounting space 110c. The mounting space 110c extends through the bottom surface of the wire harness 110b along a third direction. At least a portion of the wire harness support 130 is located within the mounting space 110c; the third direction is perpendicular to the first and second directions.

[0040] By setting the installation space 110c, the thickness of the wire harness bracket 130 is increased as much as possible while ensuring that the wire harness bracket 130 does not exceed the boundary of the isolation substrate 110 in the vertical direction, so that the wire harness bracket 130 can limit more acquisition wire harnesses 120.

[0041] In some embodiments of this application, referring to Figures 2, 4, and 9, the 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 along a first direction, and the second pressure relief hole 130a is located on the arrangement path of the plurality of first pressure relief holes 110a.

[0042] 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.

[0043] 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.

[0044] In some embodiments of this application, the distance between two adjacent wire harness brackets 130 ranges from 150mm to 200mm.

[0045] 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.

[0046] In some embodiments of this application, referring to Figures 8 to 10, the wire harness bracket 130 includes a fixing portion 131 connected to the isolation substrate 110. The fixing portion 131 has a first positioning structure, and the isolation substrate 110 has a second positioning structure that cooperates with the first positioning structure.

[0047] The wire harness bracket 130 is positioned and installed on the isolation substrate 110 by the cooperation of the first positioning structure and the second positioning structure.

[0048] In some possible implementations, the first positioning structure and the second positioning structure are engaged in a pinhole fit, a concave-convex fit, or a snap-fit ​​fit.

[0049] In some embodiments of this application, referring to Figures 1, 2, and 5, the cell connection assembly 100 further includes a bus 141. The bus 141 is mounted to the isolation substrate 110.

[0050] It should be noted that bus 141 is a series aluminum bus, and bus 141 is connected to the battery cell by laser welding, thereby conducting current from multiple battery cells. The material of bus 141 can be AL1060-O state. The thickness of bus 141 can range from 1.3mm to 1.7mm.

[0051] In some possible implementations, the busbar 141 may be 1.5 mm thick.

[0052] Referring to Figures 2, 6, 8, and 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.

[0053] The busbar 141 and the wire harness bracket 130 are positioned simultaneously by using positioning posts 111, which facilitates assembly.

[0054] In some possible implementations, the positioning post 111 can be a hot-riveted post to connect the busbar 141, the wire harness bracket 130 and the isolation substrate 110.

[0055] In some embodiments of this application, referring to FIGS. 2, 6, and 8, the isolation substrate 110 has a mounting groove 110d. The mounting groove 110d is configured to mount a busbar 141 and to position the busbar 141, and a positioning post 111 is disposed in the mounting groove 110d. At least a portion of a 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.

[0056] 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.

[0057] In some embodiments of this application, referring to FIG6, the isolation substrate 110 has a cable pass 110e. The cable pass 110e communicates 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.

[0058] In some embodiments of this application, referring to FIG6, the isolation substrate 110 further includes an isolation portion 112, which is located between two adjacent mounting slots 110d in the first direction, that is, to isolate two adjacent buses 141 in the first direction. By providing the isolation portion 112, the creepage distance between the two buses 141 is increased.

[0059] In some embodiments of this application, referring to Figures 2 and 9, the wire harness bracket 130 includes two wire clamp structures, with a second pressure relief hole 130a located between the two wire clamp structures. Each wire 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 for the passage of the acquisition wire harness 120. The height of the limiting space 130b in the third direction can be determined based on the overall height of the acquisition wire 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 wire harnesses 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 wire harness 120 to be inserted into the limiting space 130b.

[0060] 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).

[0061] In some embodiments of this application, the wire harness bracket 130 is injection molded.

[0062] In some possible implementations, referring to FIG2, the wire harnesses are wrapped with cloth tape.

[0063] In some other possible implementations, the data acquisition harness 120 can be laid out in one or two layers without having to be bundled together, thus solving the problem of the data acquisition harness 120 being too tall and occupying too much height space.

[0064] In some embodiments of this application, referring to FIG3, the cell connection assembly 100 further includes an output conductive bus 142. The output conductive bus 142 is configured 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.

[0065] 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 meeting the power transmission capacity.

[0066] In some possible implementations, the material of the first conductive layer is the same as that of the bus 141.

[0067] In some possible implementations, the output bus 142 is a copper-aluminum composite bus. Copper has high conductivity, and the copper-aluminum composite bus is welded together using polymer diffusion welding, which can reduce the width of the output bus 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 bus 142 to prevent corrosion. Verification shows that in this embodiment, the width of the output bus 142 is approximately one-quarter smaller than the width of the bus 141.

[0068] In some embodiments of this application, referring to Figures 2 and 7, the 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.

[0069] In some possible implementations, referring to Figures 2 and 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, and 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, and corroded. Because the hot melt adhesive 150 has high stability and is resistant to high temperature and high humidity environments, the probability of failure is small throughout the entire life cycle of the cell connection assembly 100.

[0070] In some embodiments of this application, referring to Figures 2, 7, 9, and 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 configured to acquire temperature information of the battery cell. The harness bracket 130 also has a wire-holding groove 130d 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, thereby limiting the position of the temperature acquisition line 122.

[0071] In some embodiments of this application, referring to Figures 1 and 3, the cell connection assembly 100 further includes a wire harness clip 160, which is configured to fix the acquisition wire harness 120 outside the isolation substrate 110.

[0072] In some possible implementations, a harness clip 160 is provided at intervals of 50 mm to 100 mm for the acquisition harness 120.

[0073] 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.

[0074] Example 2

[0075] This embodiment 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, which will not be elaborated further here.

[0076] Example 3

[0077] This embodiment provides a vehicle that includes the battery module described above. The vehicle possesses all the beneficial effects of the battery module described above, which will not be repeated here.

Claims

1. A cell connection assembly (100), comprising: 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; and 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 configured to limit 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, wherein, 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, wherein, 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, wherein, 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 4, wherein, The wire harness bracket (130) includes: Two wire clamp structures, with the second pressure relief hole (130a) located between the two wire clamp structures.

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

7. The cell connection assembly (100) according to any one of claims 1 to 6, wherein, 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.

8. The cell connection assembly (100) according to claim 7, wherein the cell connection assembly (100) further comprises: 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.

9. The cell connection assembly (100) according to claim 7, wherein the isolation substrate (110) comprises: Mounting slot (110d) is configured to mount the busbar (141); in, 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).

10. The cell connection assembly (100) according to claim 9, wherein, 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); The cable pass (110e) is configured to connect between the mounting groove (110d) and the cable pass (110b).

11. The cell connection assembly (100) according to claim 9, wherein the isolation substrate (110) further comprises: An isolation section (112) is disposed between two adjacent mounting slots (110d) in the first direction.

12. The cell connection assembly (100) according to any one of claims 1 to 6, wherein, The line clip structure includes a first stop part (132) and a second stop part (133), the first stop part (132) and the second stop part (133) forming a limiting space (130b) for the acquisition cable bundle (120) to pass through.

13. The cell connection assembly (100) according to claim 12, wherein, A wire-passing gap (130c) is also formed between the first gear part (132) and the second gear part (133), and the wire-passing gap (130c) is connected to the limiting space (130b).

14. The cell connection assembly (100) according to any one of claims 1 to 6, wherein, The thickness of the isolation substrate (110) ranges from 0.4 mm to 0.6 mm; And / or the cell connection assembly (100) further includes: Busbar (141) is installed to the isolation substrate (110); The thickness of the busbar (141) ranges from 1.3 mm to 1.7 mm.

15. The cell connection assembly (100) according to any one of claims 1 to 6, wherein the cell connection assembly (100) further comprises: Output bus (142) is configured 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.

16. The cell connection assembly (100) according to any one of claims 1 to 6, wherein the cell connection assembly (100) further comprises: 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).

17. The cell connection assembly (100) according to any one of claims 1 to 6, wherein, The data acquisition harness (120) also includes: Temperature acquisition line (122) is configured to acquire the temperature information of the battery cell; The temperature acquisition line (122) is connected to the temperature sensor (170).

18. The cell connection assembly (100) according to claim 17, wherein, The wire harness bracket (130) also has: A cable tray (130d) is provided at the bottom of the cable harness bracket (130); At least a portion of the temperature acquisition line (122) is embedded in the wire slot (130d).

19. A battery module comprising a cell connection assembly (100) as described in any one of claims 1 to 18.

20. A vehicle comprising the battery module as claimed in claim 19.

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