CCS assembly and battery pack

Abstract

The invention belongs to the technical field of power batteries, and particularly relates to a CCS assembly and a battery pack. The battery pack comprises a plurality of rows of battery monomers arranged along the X direction, the CCS assembly comprises an insulating bracket, a conductive assembly and an insulating part, the insulating bracket is arranged at one end of the battery monomers along the Z direction, and through holes for avoiding the pole columns of the battery monomers are formed in the insulating bracket; the conductive assembly comprises a plurality of conductive sheets, the conductive sheets are arranged on one side, deviating from the battery monomers, of the insulating bracket in the Z direction, and the conductive sheets are arranged opposite to the through holes and are used for being electrically connected with the pole columns; the insulating parts extend along the Y direction and are positioned between two adjacent rows of battery monomers, at least part of the insulating parts are connected with one side, facing the battery monomers, of the insulating bracket, and the X direction, the Y direction and the Z direction are vertical in pairs. And the insulating part can fill the space between the two adjacent rows of battery monomers to prevent the two adjacent rows of battery monomers from generating sprayed objects due to thermal runaway, so that the sprayed objects are prevented from being in contact with the conducting strip, and the protection effect is improved.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and in particular to a CCS module and battery pack. Background Technology

[0002] As electric vehicles become more widespread, consumers are placing higher demands on battery pack energy density and safety performance. It is especially important to prevent cascading arcing caused by the contact plates connecting two adjacent rows of cells after thermal runaway, which could lead to a sudden drop in breakdown voltage between modules.

[0003] In existing battery packs, multiple cells are arranged in multiple rows, with adjacent rows of cells connected by crossbars. To prevent arcing of the crossbars caused by the accumulation of ejected material during thermal runaway of the cells, an insulating film is usually attached to the surface of the crossbars for protection. However, the insulating film is easily damaged by the high-temperature gas ejected during thermal runaway of the cells, resulting in unstable protection. Summary of the Invention

[0004] The purpose of this invention is to provide a CCS module and battery pack that can solve the problems of arcing of the battery pack and unstable insulation protection.

[0005] To achieve this objective, the present invention employs the following technical solution: A CCS assembly for a battery pack, the battery pack comprising multiple rows of battery cells arranged along an X direction, the CCS assembly comprising: An insulating support is disposed at one end of the battery cell along the Z direction, and the insulating support is provided with through holes for avoiding the terminal posts of the battery cell; A conductive component includes multiple conductive sheets, which are disposed on the side of the insulating support away from the battery cell along the Z direction. The conductive sheets are disposed opposite to the through holes for electrical connection to the terminals. An insulating element extends along the Y direction and is located between two adjacent rows of battery cells. At least a portion of the insulating element is connected to the side of the insulating support facing the battery cell. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0006] As an optional embodiment of the aforementioned CCS component, multiple conductive sheets are arranged in multiple columns along the X direction. Some of the conductive sheets are first conductive sheets, which extend along the Y direction and connect to two adjacent battery cells in the same column along the Y direction. Multiple first conductive sheets are arranged along the Y direction to form a first conductive sheet column. Some of the conductive sheets are second conductive sheets, which extend along the X direction and connect to two adjacent battery cells in two adjacent columns along the X direction. Multiple second conductive sheets are arranged along the Y direction to form a second conductive sheet column. The first conductive sheet column and the second conductive sheet column are arranged along the X direction.

[0007] As an optional embodiment of the above-mentioned CCS component, the multiple conductive sheets are arranged in an even number of columns, and the number of conductive sheets in each column is even. One end of each column of conductive sheets along the Y direction is the first end, and the other end is the second end; Along the X direction, all conductive sheets in the first column are first conductive sheets. In the second and third columns, the conductive sheets at the second end are shared second conductive sheets, and the rest are first conductive sheets. In the second and third columns, one of the first conductive sheets at the first end is used as an input conductive sheet, and the other first conductive sheet at the first end is used as an output conductive sheet. All conductive sheets in the last column are first conductive sheets, and the conductive sheets in the remaining columns are second conductive sheets.

[0008] As an alternative to the above-mentioned CCS component, the insulating support has a protruding partition ridge formed between two adjacent columns of the first conductive sheets, and a recessed mounting groove is provided on the side of the partition ridge facing the battery cell. The insulating member located between two adjacent columns of the first conductive sheet is the first insulating member. The first insulating member includes a mounting part and an insulating part. The mounting part is located in the mounting groove, and the insulating part is located between two adjacent columns of the battery cells. The dimension of the mounting part along the X direction is larger than the dimension of the insulating part along the X direction.

[0009] As an alternative to the aforementioned CCS component, the dimension of the mounting portion along the X direction is larger than the spacing between two adjacent rows of battery cells along the X direction, so that the two side edges of the mounting portion along the X direction can overlap the shoulders of the two adjacent rows of battery cells.

[0010] As an alternative to the above-mentioned CCS component, the insulating element located between two adjacent columns of the first conductive sheet is the first insulating element, and the first insulating element is bonded and fixed to the insulating bracket.

[0011] As an alternative to the above-mentioned CCS component, the insulating member located below the second conductive sheet in each column is a second insulating member. The dimension of the second insulating member along the X direction is larger than the spacing between two adjacent columns of battery cells along the X direction, so that the second insulating member is interference-fitted between the two adjacent columns of battery cells.

[0012] To achieve this objective, the present invention employs the following technical solution: A battery pack, comprising: Multiple battery cells arranged in multiple columns along the X direction; In the aforementioned CCS assembly, the insulating support is disposed at one end of the battery cell where the electrode post is disposed along the Z direction, the conductive sheet is electrically connected to the electrode post, and the insulating element is located between two adjacent rows of battery cells.

[0013] As an alternative to the above-mentioned battery pack, the battery pack further includes a side cooling plate extending along the Y direction, and the side cooling plate is provided on both sides of each row of battery cells along the X direction. The side cold plate, the two adjacent rows of battery cells, and the insulating bracket or the conductive component form a strip-shaped space extending along the Y direction, and the insulating element fills the strip-shaped space.

[0014] As an alternative to the aforementioned battery pack, some of the conductive sheets are second conductive sheets. The second conductive sheet extends along the X direction and connects two adjacent battery cells in two adjacent columns along the X direction. The second conductive sheet has a protrusion along the Z direction toward the battery cell. The protrusion can abut against one side of the insulating member along the Z direction, so that the other side of the insulating member along the Z direction abuts against the side cold plate.

[0015] The beneficial effects of this invention are: In the CCS assembly provided by this invention, the conductive sheet is disposed on the side of the insulating support away from the battery cell. The insulating support can provide insulation protection for the position where the conductive sheet does not contact the terminal post. By setting the insulating component, the space between two adjacent rows of battery cells can be filled to block the ejected gas or ejected material generated by thermal runaway between the two adjacent rows of battery cells, so as to avoid the ejected material from contacting the conductive sheet, thereby improving the protection effect.

[0016] The battery pack provided by this invention includes the above-mentioned CCS component, which can solve the problems of arcing of the battery pack and unstable insulation protection effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the battery pack provided by the present invention without the top cover. Figure 2This is a top view of a portion of the structure of the CCS component provided by the present invention; Figure 3 This is a schematic diagram of the structure of the insulating support and some conductive sheets provided by the present invention; Figure 4 yes Figure 3 A magnified view of a section at point A in the middle; Figure 5 yes Figure 3 A magnified view of a section at point B in the middle; Figure 6 This is a top view of the insulating support and some conductive sheets provided by the present invention; Figure 7 This is a partial structural schematic diagram of the battery pack provided by the present invention; Figure 8 This is a first cross-sectional view of a portion of the structure of the battery pack provided by the present invention; Figure 9 This is a second cross-sectional view of a portion of the battery pack structure provided by the present invention.

[0018] In the picture: 10. Housing; 20. Battery cell; 30. CCS module; 31. Insulating bracket; 311. Through hole; 312. Clearance hole; 313. Separating ridge; 314. Positioning groove; 315. Positioning post; 316. Mounting groove; 32. Conductive component; 321. Conductive sheet; 321a. First conductive sheet; 321b. Second conductive sheet; 3211. Protrusion; 33. Signal acquisition component; 34. Insulating component; 34a. First insulating component; 341. Mounting part; 342. Insulating part; 34b. Second insulating component; 40. Side cold plate. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, the present invention provides a battery pack, including a housing 10, a battery pack disposed within the housing 10, and a CCS assembly 30 connecting multiple battery cells 20 to achieve electrical connection of the multiple battery cells 20. The battery pack includes multiple battery cells 20 arranged in multiple rows along the X direction.

[0024] Combination Figure 1 and Figure 2 As shown, the CCS assembly 30 includes an insulating support 31, a conductive component 32, a signal acquisition component 33, and an insulating component 34. The insulating support 31 is disposed at one end of the battery cell 20 along the Z direction where the terminal post is disposed, and the insulating support 31 has a through hole 311 for avoiding the terminal post of the battery cell 20. The conductive component 32 includes a plurality of conductive sheets 321, which are disposed on the side of the insulating support 31 along the Z direction away from the battery cell 20. The conductive sheets 321 are disposed opposite to the through hole 311 for electrically connecting the terminal post. The signal acquisition component 33 is electrically connected to the conductive component 32 to realize the acquisition of electrical signals. The signal acquisition component 33 can be a flexible circuit board. The insulating component 34 extends along the Y direction and is located between two adjacent rows of battery cells 20. At least part of the insulating component 34 is connected to the side of the insulating support 31 facing the battery cell 20, wherein the X, Y, and Z directions are perpendicular to each other.

[0025] The conductive sheet 321 is disposed on the side of the insulating support 31 away from the battery cell 20. The insulating support 31 can provide insulation protection for the position where the conductive sheet 321 does not contact the terminal post. By providing the insulating component 34, the space between two adjacent rows of battery cells 20 can be filled to block the ejected gas or ejected material generated by thermal runaway between the two adjacent rows of battery cells 20, so as to avoid the ejected material from contacting the conductive sheet 321, thereby improving the protection effect.

[0026] In some embodiments, the X direction is the width direction of the box 10, the Y direction is the length direction of the box 10, and the Z direction is the height direction of the box 10.

[0027] In some embodiments, the insulating support 31 can be made of insulating material using a vacuum forming process. Vacuum forming has extremely low mold costs and fast production speed, and can produce plastic structures with large surfaces and thin walls, which is beneficial for mass production and reduces production costs.

[0028] In some other embodiments, the insulating bracket 31 can be formed by injection molding, which results in stable strength and higher precision after molding.

[0029] In some embodiments, the insulating support 31 is provided with a clearance hole 312, which is correspondingly provided with a safety valve on the battery cell 20, so that when the battery cell 20 thermally runs away and the safety valve opens, the generated ejected material can pass through the clearance hole 312, thus preventing the safety valve from failing to open and causing combustion, explosion or other situations.

[0030] In some embodiments, the insulating element 34 may be made of an elastic insulating material, so that, while satisfying the insulation protection, it can better fill the space between two adjacent rows of battery cells 20 by utilizing its own elasticity, so as to avoid the ejected material or ejected gas generated during thermal runaway from contacting the conductive sheet 321, thereby improving the insulation protection effect.

[0031] In some possible implementations, the insulating element 34 can be made of closed-cell foamed silicone material. Closed-cell foamed silicone material has superior insulation properties, ensuring high resistance and effectively preventing current leakage. This avoids the risk of cross-current or short circuits between different battery cells 20 or modules, providing insulation protection in high-voltage electrical environments. Furthermore, it ensures that the insulation performance does not degrade at high temperatures, guaranteeing the safety of the battery pack. Closed-cell foamed silicone material also has superior elastic mechanical properties, allowing it to adapt to the spatial shape between adjacent rows of battery cells 20 and providing a buffering effect for the battery cells 20.

[0032] For example, the insulating component 34 can be made of ceramicized silicone rubber. Ceramicized silicone rubber forms a dense ceramic layer of 0.2mm within 30 seconds at 800℃, providing effective thermal protection. It effectively blocks heat conduction and flame spread in localized high-temperature areas, delaying the spread of thermal runaway to adjacent battery cells 20 in the event of a high-temperature open flame caused by thermal runaway of a single battery cell 20. While achieving thermal protection, it also blocks the conductive path caused by the exposed conductive sheet 321 under high-temperature conditions, preventing electrical faults such as leakage and short circuits during thermal runaway. Ceramicized silicone rubber retains the flexibility and elasticity of silicone rubber at room temperature, adapting to the irregular filling requirements between adjacent rows of battery cells 20, resulting in good installation fit. Furthermore, the ceramicization process requires no additional triggering conditions; it spontaneously completes the morphological transformation solely based on the high-temperature environment, eliminating the need for complex triggering devices and simplifying the design and assembly process of the battery pack's thermal protection structure.

[0033] Optionally, the insulating element 34 may specifically be methyl vinyl silicone rubber.

[0034] In some other possible embodiments, the insulation element 34 may be made of a composite material, for example, using methyl vinyl silicone rubber as the base material and adding functional fillers. Exemplarily, the functional filler comprises 25 wt% mica flakes and 10 wt% silicon carbide fibers.

[0035] In some embodiments, such as Figures 3-5 As shown, the insulating bracket 31 has a positioning groove 314 on the side opposite to the battery cell 20 along the Z direction. A through hole 311 is provided on the bottom surface of the positioning groove 314. The conductive sheet 321 is disposed in the positioning groove 314 to limit the position of the conductive sheet 321 and prevent the conductive sheet 321 from moving and causing poor contact with the terminal.

[0036] In some embodiments, such as Figure 4 and Figure 5 As shown, each positioning groove 314 is provided with at least two positioning posts 315, and the conductive sheet 321 is provided with positioning holes. The positioning posts 315 cooperate with the positioning holes to fix the specific position of the conductive sheet 321, prevent the conductive sheet 321 from moving, and ensure that the conductive sheet 321 can correspond to the position of the through hole 311 so as to contact and electrically connect with the pole in the through hole 311.

[0037] In some embodiments, the dimension of the positioning groove 314 along the Y direction is larger than the dimension of the conductive sheet 321 along the Y direction to increase the creepage distance, isolate two adjacent conductive sheets 321, and prevent arcing. Optionally, the difference between the dimension of the positioning groove 314 along the Y direction and the dimension of the conductive sheet 321 along the Y direction can be 4 mm to ensure the isolation effect.

[0038] In some embodiments, the depth of the positioning groove 314 is greater than or equal to the thickness of the conductive sheet 321, so as to better accommodate the conductive sheet 321 and improve the fixing effect of the conductive sheet 321.

[0039] In some embodiments, the tolerance of the distance between two adjacent positioning grooves 314 along the Y direction is ±0.15mm, so as to avoid contact or arcing between two adjacent conductive sheets 321 along the Y direction.

[0040] To achieve series and / or parallel connection of multiple battery cells 20, such as Figure 3 and Figure 6 As shown, multiple conductive sheets 321 are arranged in multiple columns along the X direction. Some conductive sheets 321 are first conductive sheets 321a, which extend along the Y direction and connect to two adjacent battery cells 20 in the same column along the Y direction. Multiple first conductive sheets 321a are arranged along the Y direction to form a first conductive sheet column. Some conductive sheets 321 are second conductive sheets 321b, which extend along the X direction and connect to two adjacent battery cells 20 in two adjacent columns along the X direction. Multiple second conductive sheets 321b are arranged along the Y direction to form a second conductive sheet column. The first and second conductive sheet columns are arranged along the X direction. Through the cooperation of the first conductive sheets 321a and the second conductive sheets 321b, multiple battery cells 20 can be connected in series or in parallel according to actual needs, making the connection more flexible.

[0041] In some embodiments, such as Figure 6 As shown, the cooperation of multiple first conductive sheets 321a and multiple second conductive sheets 321b connects multiple battery cells 20 in series. In other embodiments, the cooperation of multiple first conductive sheets 321a and multiple second conductive sheets 321b can achieve at least some battery cells 20 connected in series and / or at least some battery cells 20 connected in parallel.

[0042] It is understandable that among all the conductive pieces 321 in the CCS component 30, one conductive piece 321 is an input conductive piece and the other conductive piece 321 is an output conductive piece. The input conductive piece and the output conductive piece serve as the input and output poles of the battery pack to realize the input and output of electrical signals.

[0043] To simplify the structure within the battery pack, in some embodiments, the input conductive sheet and the output conductive sheet are located on the same side of multiple battery cells 20, so as to realize the same-side arrangement of the input stage and the output stage, which facilitates the structural layout.

[0044] Specifically, such as Figure 6As shown, multiple conductive sheets 321 are arranged in an even-numbered column. One end of each column of conductive sheets 321 along the Y direction is the first end, and the other end is the second end. Along the X direction, the conductive sheets 321 in the first column are all first conductive sheets 321a. In the second and third columns of conductive sheets 321, the conductive sheets 321 located at the second end are shared second conductive sheets 321b, and the rest are first conductive sheets 321a. In the second and third columns, one of the first conductive sheets 321a located at the first end is used as the input conductive sheet, and the other first conductive sheet 321a located at the first end is used as the output conductive sheet. The last column of conductive sheets 321 are all first conductive sheets 321a, and the conductive sheets 321 in the remaining columns are second conductive sheets 321b.

[0045] In other words, the first and last columns of conductive sheets 321 are both first conductive sheet columns, the second and third columns of conductive sheets 321 at their second ends are shared second conductive sheets 321b, and the remaining columns of conductive sheets 321 are all second conductive sheet columns. This arrangement allows the first battery cells 20 to be connected in series sequentially. Then, the remaining columns of battery cells 20 arranged along the X direction are grouped together, and multiple battery cells 20 arranged along the X direction within the same group are connected in series sequentially. Next, adjacent groups are then connected in series sequentially. This series connection method allows the conductive sheets 321 at the first ends of the second and third columns of conductive sheets 321 to be the input and output conductive sheets, respectively. Since the input and output conductive sheets are located on the same side and adjacent to each other, they can be easily connected to other electrical components within the battery pack, facilitating a rational arrangement of the internal structure of the battery pack and optimizing space utilization.

[0046] In some other embodiments, the circuit connection method between multiple battery cells 20 can be set according to actual needs, and is not limited here.

[0047] In some embodiments, such as Figure 7 As shown, the insulating support 31 has a protruding separating ridge 313 between two adjacent rows of first conductive sheets 321a. The separating ridge 313 can isolate the adjacent first conductive sheets 321a along the X direction, increase the creepage distance, and avoid short circuits.

[0048] In some embodiments, such as Figure 8As shown, a recessed mounting groove 316 is provided on the side of the separator 313 facing the battery cell 20. The insulating member 34 located between two adjacent rows of first conductive sheets 321a is the first insulating member 34a. The first insulating member 34a includes a mounting part 341 and an insulating part 342. The mounting part 341 is located in the mounting groove 316, and the insulating part 342 is located between two adjacent rows of battery cells 20. The dimension of the mounting part 341 in the X direction is larger than the dimension of the insulating part 342 in the X direction. The first insulating member 34a is fixed by the mounting groove 316, which can improve the fixing effect of the first insulating member 34a and better insulate and isolate the first conductive sheets 321a on both sides. On the other hand, it can improve the strength of the insulating bracket 31 at the separator 313 and prevent the first conductive sheets 321a from short-circuiting with the casing of the battery cell 20 due to deformation or movement.

[0049] like Figure 8 As shown, in some embodiments, the dimension of the mounting portion 341 along the X direction is larger than the distance between two adjacent rows of battery cells 20 along the X direction, so that the two side edges of the mounting portion 341 along the X direction can overlap the shoulders of the two adjacent rows of battery cells 20. The design of the mounting portion 341 overlapping the shoulders of the battery cells 20 adds an additional limiting effect on the battery cells 20, improving the structural stability of the battery pack.

[0050] In some embodiments, the dimension of the mounting portion 341 along the Z direction is greater than the depth of the mounting groove 316 along the Z direction, allowing the mounting portion 341 to extend beyond the mounting groove 316. That is, the top end face of the mounting portion 341 abuts against the bottom surface of the mounting groove 316, and the bottom end face of the mounting portion 341 abuts against the shoulder of the battery cell 20. The insulating bracket 31 located at the mounting groove 316 does not directly contact the battery cell 20, avoiding problems such as gaps between the insulating bracket 31 and the first insulating member 34a and the shoulder of the battery cell 20 due to dimensional deviations, which could lead to insulation failure and easy displacement of the insulating bracket 31. Simultaneously, the portion extending beyond the mounting groove 316 can create a slight pre-pressure on the battery cell 20 in the Z direction, counteracting the expansion displacement of the battery cell 20 during charging and discharging, reducing gap changes between adjacent battery cells 20, and improving the overall compactness and stability of the battery pack structure. This further reduces the risk of abnormal noise and loosening of the battery pack under bumpy driving conditions.

[0051] In some embodiments, to improve the fixing effect of the first insulating member 34a, the first insulating member 34a is bonded and fixed to the insulating bracket 31. The first insulating member 34a is bonded and fixed in the mounting groove 316, which is simple in process and has a good fixing effect.

[0052] Optionally, the first insulating component 34a can be bonded and fixed to the insulating bracket 31 using arc-resistant pressure-sensitive adhesive, which provides a reliable fixing effect.

[0053] It should be noted that, based on the first insulating member 34a being bonded and fixed to the mounting groove 316, the mounting part 341 and the mounting groove 316 can be clearance-fitted, eliminating the need for an interference fit for fixation, thus making installation more convenient. In some other embodiments, in addition to the first insulating member 34a being bonded and fixed to the mounting groove 316, the mounting part 341 can also be bonded and fixed to the mounting groove 316 to improve the fixing effect.

[0054] Optionally, the mounting portion 341 of the first insulating member 34a is fixed by an interference fit with the mounting groove 316.

[0055] In some embodiments, the mounting groove 316 is a through groove extending along the Y direction. The first insulating member 34a can be slidably assembled into the mounting groove 316 along the Y direction and bonded in place, which is convenient and helps to reduce assembly difficulty. In other embodiments, the mounting groove 316 may not be a through groove, that is, the two ends of the mounting groove 316 along the Y direction are closed ends, and the first insulating member 34a can be installed into the mounting groove 316 along the Z direction.

[0056] In some embodiments, such as Figure 9 As shown, the insulating member 34 located below each column of second conductive sheet 321b is the second insulating member 34b. The dimension of the second insulating member 34b along the X direction is larger than the distance between the adjacent two columns of battery cells 20 along the X direction, so that the second insulating member 34b is interference-fitted between the adjacent two columns of battery cells 20. The second insulating member 34b is clamped and fixed between the adjacent two columns of battery cells 20 by interference fit, which simplifies the fixing structure and reduces costs; and the deformation of the second insulating member 34b in the interference fit can fully fill the space between the adjacent two columns of battery cells 20, providing insulation protection and shock absorption, buffering and support for the battery cells 20, thereby improving the stability of the battery cells 20 on both sides.

[0057] In some embodiments, the elastic modulus of the second insulating member 34b is greater than that of the first insulating member 34a to ensure the fixing effect of the second insulating member 34b using an interference fit, thereby improving the stability of the second insulating member 34b. Furthermore, the withstand voltage values ​​of the second insulating member 34b and the first insulating member 34a can be the same to ensure their insulation withstand voltage capabilities and overall insulation capacity.

[0058] In some embodiments, the battery pack also includes a side cooling plate 40 extending along the Y direction. Each row of battery cells 20 is provided with a side cooling plate 40 on both sides along the X direction. The side cooling plate 40 is used to cool the battery cells 20 to prevent thermal runaway of the battery cells 20 during operation, so as to ensure the safety of the battery pack.

[0059] In some embodiments, the side cold plate 40, two adjacent rows of battery cells 20, and the insulating support 31 or conductive component 32 form a strip-shaped space extending along the Y direction. This strip-shaped space is a critical location where the electrical clearance of the battery pack is small and the risk of short circuit is high. The insulating component 34 fills the strip-shaped space, which can completely fill the space gap and block the conductive path between the side cold plate 40 and the conductive component 32 and the battery cell 20 shell, avoiding short circuits caused by component contact due to vehicle vibration or charging and discharging deformation. At the same time, it can eliminate creepage and arcing phenomena caused by air gaps in the space. Especially in high-voltage power battery packs, it can effectively improve the insulation protection effect and meet high-voltage electrical safety standards. Furthermore, the filling of the insulating component 34 forms an X-direction limit for the battery cell 20, offsetting the lateral stress generated by the expansion of the battery cell 20 and preventing the battery cell 20 from being squeezed and deformed. It can also fix the relative position of the insulating support 31 and the side cold plate 40, avoiding loosening of the battery pack structure caused by component displacement, reducing abnormal noise and loosening problems during battery pack operation, and improving the overall structural stability. More importantly, it blocks the conduction of high temperature to the side cold plate 40 and adjacent battery cells 20 when the battery cell 20 experiences thermal runaway, thus delaying the spread of thermal runaway.

[0060] Specifically, the mounting groove 316, the two adjacent rows of battery cells 20, and the side cold plate 40 form a strip-shaped space to accommodate the first insulating member 34a. The first insulating member 34a fills the strip-shaped space, which can completely separate the battery cells 20 on both sides, preventing the ejected material from the thermally runaway battery cells 20 from contacting the conductive sheet 321 or the battery cells 20 on the other side through the strip-shaped space, so as to avoid short circuits and heat spread.

[0061] The second conductive sheet 321b, the two adjacent rows of battery cells 20, and the side cold plate 40 form a strip-shaped space to accommodate the second insulating member 34b. The second insulating member 34b fills the strip-shaped space, which can completely separate the battery cells 20 on both sides, preventing the ejected material from the thermally runaway battery cells 20 from contacting the conductive sheet 321 or the battery cells 20 on the other side through the strip-shaped space, so as to avoid short circuits and heat spread.

[0062] In some embodiments, the second insulating member 34b is installed after the second conductive piece 321b is welded and fixed to the pole post, to avoid affecting the second conductive piece 321b during welding. In this case, the top surface of the second insulating member 34b is spaced apart from the top surface of the second conductive piece 321b to ensure insulation while preventing the second conductive piece 321b from affecting the second insulating member 34b. Further, as... Figure 9As shown, an insulating support 31 is provided between the second insulating member 34b and the second conductive sheet 321b to further improve the insulation effect. Furthermore, to prevent the welding of the second conductive sheet 321b from affecting the insulating support 31, the second conductive sheet 321b and the insulating support 31 are spaced apart. In this case, to ensure the insulation effect as much as possible, the side of the second insulating member 34b facing the second conductive sheet 321b can abut against the insulating support 31 to avoid gaps between the second insulating member 34b and the insulating support 31, preventing foreign objects from entering. Since the second insulating member 34b is fixed by an interference fit, to improve the fixing effect and insulation protection effect of the second insulating member 34b, in some embodiments, the second conductive sheet 321b is provided with a protrusion 3211 along the Z direction facing the battery cell 20. The protrusion 3211 can abut against one side of the second insulating member 34b along the Z direction, so that the other side of the second insulating member 34b along the Z direction abuts against the side cold plate 40. By providing a protrusion 3211 to abut against the second insulating member 34b, the coverage effect of the second insulating member 34b on the surface of the second conductive sheet 321b and the side cold plate 40 can be improved, avoiding contact with the ejected material generated during thermal runaway, so as to ensure the safety of the battery pack. In addition, the protrusion 3211 can also increase the strength of the second conductive sheet 321b, preventing the second conductive sheet 321b from deforming and causing failure to contact the terminal post.

[0063] In some embodiments, in the battery pack, a first insulating member 34a is provided between the first row of battery cells 20 and the second row of battery cells 20, and a second insulating member 34b is provided between each of the remaining adjacent rows of battery cells 20.

[0064] Compared to the double insulation protection between adjacent rows of first conductive sheets 321a via insulating supports 31 and first insulating elements 34a, which increases the breakdown voltage from 800V to 2500V, each row of second conductive sheets 321b is only insulated by second insulating elements 34b. Therefore, in some embodiments, the second insulating element 34b can undergo surface treatment after molding to improve its hardness. Optionally, the surface treatment process can involve secondary vulcanization at 180°C to achieve a Shore hardness of HA75 for the second insulating element 34b, thereby improving the protective effect and ensuring an insulation resistance greater than 10 ohms in the eruption test. 6 Ω.

[0065] In some embodiments, one end of the insulating bracket 31 along the Y direction is connected to a connecting seat, which is used to fix the terminals of the signal acquisition device 33 to realize the input and output of the acquired signal; the connecting seat is fixedly connected to the housing 10 to fix the insulating bracket 31. Specifically, the housing 10 includes a crossbeam, and the connecting seat is fixedly connected to the crossbeam by screws to fix the insulating bracket 31.

[0066] In some embodiments, the insulating support 31 is a PC / ABS alloy plate, that is, the insulating support 31 is made of a mixed material formed by mixing polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS), which has good fluidity, is suitable for injection molding, and has high strength, high toughness, and excellent heat resistance, which can meet the application requirements.

[0067] In some embodiments, the surface of the insulating support 31 is sprayed with an Al2O3 suspension to improve the hardness, thermal conductivity and insulation performance of the insulating support 31.

[0068] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A CCS assembly for a battery pack, the battery pack comprising multiple rows of battery cells (20) arranged along the X direction, characterized in that, The CCS component includes: An insulating bracket (31) is provided at one end of the battery cell (20) along the Z direction, and the insulating bracket (31) is provided with a through hole (311) for avoiding the terminal post of the battery cell (20). The conductive component (32) includes a plurality of conductive sheets (321), the conductive sheets (321) being disposed on the side of the insulating support (31) away from the battery cell (20) in the Z direction, and the conductive sheets (321) being disposed opposite to the through hole (311) for electrically connecting the terminal post; An insulating element (34) extends along the Y direction and is located between two adjacent rows of battery cells (20). At least a portion of the insulating element (34) is connected to the side of the insulating support (31) facing the battery cell (20). The X direction, the Y direction and the Z direction are perpendicular to each other.

2. The CCS component according to claim 1, characterized in that, Multiple conductive sheets (321) are arranged in multiple columns along the X direction. Some of the conductive sheets (321) are first conductive sheets (321a). The first conductive sheets (321a) extend along the Y direction and connect two adjacent battery cells (20) in the same column along the Y direction. Multiple first conductive sheets (321a) are arranged along the Y direction to form a first conductive sheet column. Some of the conductive sheets (321) are second conductive sheets (321b). The second conductive sheets (321b) extend along the X direction and connect two adjacent battery cells (20) in two adjacent columns along the X direction. Multiple second conductive sheets (321b) are arranged along the Y direction to form a second conductive sheet column. The first conductive sheet column and the second conductive sheet column are arranged along the X direction.

3. The CCS component according to claim 2, characterized in that, The plurality of conductive sheets (321) are arranged in an even-numbered column; Each column of conductive sheets (321) has a first end at one end along the Y direction and a second end at the other end; Along the X direction, the conductive sheets (321) in the first column are all the first conductive sheets (321a). In the second and third columns, the conductive sheets (321) at the second end are shared second conductive sheets (321b), and the rest are the first conductive sheets (321a). In the second and third columns, the first conductive sheet (321a) at the first end of one column is the input conductive sheet, and the first conductive sheet (321a) at the other end of the third column is the output conductive sheet. The conductive sheets (321) in the last column are all the first conductive sheets (321a), and the conductive sheets (321) in the remaining columns are the second conductive sheets (321b).

4. The CCS component according to claim 2, characterized in that, The insulating support (31) has a protruding partition ridge (313) between two adjacent rows of the first conductive sheets (321a), and the partition ridge (313) has a recessed mounting groove (316) on the side facing the battery cell (20). The insulating member (34) located between two adjacent columns of the first conductive sheet (321a) is the first insulating member (34a). The first insulating member (34a) includes a mounting part (341) and an insulating part (342). The mounting part (341) is located in the mounting groove (316), and the insulating part (342) is located between two adjacent columns of the battery cells (20). The dimension of the mounting part (341) along the X direction is larger than the dimension of the insulating part (342) along the X direction.

5. The CCS component according to claim 4, characterized in that, The mounting portion (341) is larger in size along the X direction than the spacing between two adjacent rows of battery cells (20) along the X direction, so that the two sides of the mounting portion (341) along the X direction can overlap the shoulders of the two adjacent rows of battery cells (20).

6. The CCS component according to claim 2, characterized in that, The insulating element (34) located between two adjacent columns of the first conductive sheet (321a) is the first insulating element (34a), and the first insulating element (34a) is bonded and fixed to the insulating bracket (31).

7. The CCS component according to claim 2, characterized in that, The insulating member (34) located below each column of the second conductive sheet (321b) is a second insulating member (34b). The size of the second insulating member (34b) along the X direction is larger than the spacing between two adjacent columns of battery cells (20) along the X direction, so that the second insulating member (34b) is interference-fixed between the two adjacent columns of battery cells (20).

8. A battery pack, characterized in that, include: Multiple battery cells (20) arranged in multiple columns along the X direction; In any one of claims 1-7, the insulating support (31) is disposed at one end of the battery cell (20) where the electrode post is disposed along the Z direction, the conductive sheet (321) is electrically connected to the electrode post, and the insulating member (34) is located between two adjacent rows of battery cells (20).

9. The battery pack according to claim 8, characterized in that, The battery pack also includes a side cooling plate (40) extending along the Y direction, and the side cooling plate (40) is provided on both sides of each row of battery cells (20) along the X direction. The side cold plate (40), the two adjacent rows of battery cells (20), and the insulating bracket (31) or the conductive component (32) form a strip space extending along the Y direction, and the insulating element (34) fills the strip space.

10. The battery pack according to claim 9, characterized in that, Part of the conductive sheet (321) is a second conductive sheet (321b). The second conductive sheet (321b) extends along the X direction and connects two adjacent battery cells (20) in two adjacent columns along the X direction. The second conductive sheet (321b) is provided with a protrusion (3211) along the Z direction toward the battery cell (20). The protrusion (3211) can abut against one side of the insulating member (34) along the Z direction, so that the insulating member (34) abuts against the side cold plate (40) along the other side of the Z direction.

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