Limiting isolation bar, integrated busbar and battery pack

Abstract

The embodiment of the invention provides a limiting isolation bar, an integrated busbar and a battery pack, and relates to the technical field of batteries, the limiting isolation bar comprises a plurality of isolation units and a connecting part for connecting the plurality of isolation units, each isolation unit comprises an annular insulation part and an insulation covering part, the annular insulation part forms a sleeving hole in a surrounding manner, and the insulation covering part covers the annular insulation part. The annular insulating part is arranged on the end face shell and is configured to be sleeved on the peripheral surfaces of the battery monomers so as to electrically isolate the adjacent battery monomers, the insulating covering part is arranged at one end of the annular insulating part and is locally hollowed to form an avoiding hole communicated with the sleeving hole, the insulating covering part is configured to be arranged on the end face shell, and the pole and part of the end face shell are exposed through the avoiding hole. Compared with the prior art, the insulating separator provided by the embodiment of the invention can effectively avoid short circuit between the battery monomer and the adjacent battery monomer or the connecting bar, reduce the risk of short circuit and improve the safety of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and more particularly, to a limit isolation row, an integrated busbar, and a battery pack. Background Art

[0002] Due to their small size, a relatively large number of cylindrical battery cells are usually arranged in a battery pack. And due to their complex series-parallel structure, the mutual spacing protection between battery cells and the spacing protection between the connection row and the battery cells are quite important. Currently, the electrical isolation means for battery cells are relatively scarce, and the short-circuit risk is relatively high. Summary of the Invention

[0003] An object of the present invention is to provide a limit isolation row, an integrated busbar, and a battery pack, which can effectively avoid short circuits between battery cells and adjacent battery cells or electrical connection rows, reduce the short-circuit risk, and improve the safety of the battery.

[0004] In one aspect, an embodiment of the present invention provides a limit isolation row for being disposed on a plurality of battery cells. The end faces of the battery cells are provided with mutually electrically isolated pole posts and end face housings. The limit isolation row includes a plurality of isolation units and a connection portion connecting the plurality of isolation units. Each isolation unit includes an annular insulating portion and an insulating covering portion. The annular insulating portion defines a socket hole and is configured to be sleeved on the circumferential surface of the battery cell to electrically isolate adjacent battery cells. The insulating covering portion is disposed at one end of the annular insulating portion and is partially hollowed out to form an avoidance hole communicating with the socket hole. The insulating covering portion is configured to be disposed on the end face housing and expose the pole post and a part of the end face housing through the avoidance hole.

[0005] In an alternative embodiment, adjacent annular insulating portions are spaced apart from each other to form a gap space, and adjacent insulating covering portions are connected to each other through the connection portion. The connection portion is provided with a glue filling and guiding hole, and the glue filling and guiding hole communicates with the gap space.

[0006] In an alternative embodiment, fixing rivets are provided on the insulating covering portion and / or the connection portion, and the fixing rivets are configured to be riveted to a connection row.

[0007] In an alternative embodiment, the avoidance hole includes a pole post avoidance area and an end housing avoidance area connected to each other in a first direction. The pole post avoidance area is circular and is configured to be adapted to the pole post for the pole post to pass through. The end housing avoidance area is fan-shaped and is configured to expose a part of the end face housing. The plurality of end housing avoidance areas are spaced apart in the first direction.

[0008] On the other hand, an embodiment of the present invention further provides an integrated busbar, including a connecting row and the aforementioned limiting and isolating row. The connecting row includes a plurality of interconnected connecting pieces. One end of each connecting piece is configured to pass through the avoidance hole of the battery cell and connect to the pole column of the battery cell, and the other end is configured to cross the insulating covering portion of the battery cell and pass through the avoidance hole of the adjacent battery cell to connect to the end face housing of the adjacent battery cell.

[0009] In an alternative embodiment, the connecting pieces connect two adjacent battery cells along a first direction, and a plurality of the connecting pieces are interconnected along a second direction through connecting and fixing pieces. The connecting and fixing pieces are connected to the isolation unit or the connecting portion, and the second direction is perpendicular to the first direction.

[0010] On the other hand, an embodiment of the present invention provides a battery pack, including a base, a plurality of battery cells, and the aforementioned integrated busbar. The plurality of battery cells are arranged on the base. One end of each battery cell away from the base is provided with a pole column and an end face housing that are electrically isolated from each other. The limiting and isolating row is arranged at one end of the plurality of battery cells away from the base. A plurality of the annular insulating portions are correspondingly sleeved on the circumferences of the plurality of battery cells, and a plurality of the insulating covering portions are correspondingly attached to the end face housings of the plurality of battery cells, and the pole columns and part of the end face housings are exposed through the avoidance holes.

[0011] In an alternative embodiment, a plurality of protruding positioning portions are provided on the base, and a plurality of positioning grooves are formed by the cooperation between the plurality of protruding positioning portions. The plurality of battery cells are respectively assembled in the plurality of positioning grooves one by one;

[0012] Each of the positioning grooves is further provided with explosion-proof holes, and the plurality of explosion-proof holes are correspondingly arranged at one end of the plurality of battery cells away from the limiting and isolating row;

[0013] At least one arc surface is formed on the side wall of each protruding positioning portion, and the arc surface is attached to the circumference of the corresponding battery cell.

[0014] In an alternative embodiment, the battery pack further includes a water-cooling plate. The water-cooling plate is arranged between the plurality of battery cells along the first direction. The annular insulating portion is arranged between the water-cooling plate and the circumferences of the battery cells to space the water-cooling plate from the circumferences of the battery cells;

[0015] The connecting portion is arranged on the water-cooling plate to limit the water-cooling plate.

[0016] In an alternative embodiment, a thermal conductive adhesive layer is coated in the gap between the water-cooling plate and the peripheral surface of the battery cell, and the thermal conductive adhesive layer is configured to achieve heat transfer between the water-cooling plate and the battery cell.

[0017] The beneficial effects of the embodiments of the present invention are as follows:

[0018] The limiting isolation row, the integrated busbar and the battery pack provided by the embodiments of the present invention use the socket hole formed by the annular insulating part to socket the annular insulating part on the peripheral surface of the battery cell, so that adjacent battery cells are electrically isolated. At the same time, the insulating covering part is arranged on the end face housing and is locally hollowed out to form an avoidance hole exposing the pole column and part of the end face housing. During actual assembly, the annular insulating part can cover the peripheral surface of the battery cell, so that adjacent battery cells can be separated, thereby achieving electrical isolation between adjacent battery cells. The end face and the pole column of the battery cell can be used as the negative electrode and the positive electrode respectively. The insulating covering part can expose the pole column through the avoidance hole, which is convenient for the electrical connection row to be connected to the pole column. At the same time, the insulating covering part can separate the connection row from the end face housing of the lower battery cell, so that the connection row is electrically isolated from the end face housing of the battery cell. Compared with the prior art, the insulating isolation part provided by the embodiments of the present invention can effectively prevent the battery cell from short-circuiting with adjacent battery cells or connection rows, reduce the short-circuit risk, and improve the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 FIG. 15 is a schematic structural diagram of the limiting isolation row provided by the embodiment of the present invention from the first perspective;

[0021] Figure 2 FIG. 19 is a schematic structural diagram of the limiting isolation row provided by the embodiment of the present invention from the second perspective;

[0022] Figure 3 FIG. 23 is a schematic assembly structure diagram of the limiting isolation row provided by the embodiment of the present invention;

[0023] Figure 4 FIG. 27 is a schematic structural diagram of the integrated busbar provided by the embodiment of the present invention;

[0024] Figure 5 FIG. 31 is an exploded structural diagram of the integrated busbar provided by the embodiment of the present invention;

[0025] Figure 6 Schematic structural diagram of the battery pack provided by the embodiment of the present invention;

[0026] Figure 7 Exploded structural diagram of the battery pack provided by the embodiment of the present invention;

[0027] Figure 8 is Figure 7 Schematic structural diagram of the middle base;

[0028] Figure 9 is Figure 6 Partial structural diagram of the battery pack after removing the base in the [specific reference];

[0029] Figure 10 is Figure 9 Cross-sectional schematic diagram at A-A in the [specific reference].

[0030] Icon: 100 - Limit isolation row; 110 - Isolation unit; 130 - Ring-shaped insulating part; 131 - Socket hole; 150 - Insulating covering part; 151 - Avoidance hole; 153 - Fixed rivet post; 155 - Pole post avoidance area; 157 - End shell avoidance area; 170 - Connection part; 171 - Glue filling diversion hole; 200 - Integrated bus bar; 210 - Connection row; 211 - Connection piece; 213 - Connection fixing piece; 230 - Acquisition row; 300 - Battery pack; 310 - Base; 311 - Protrusion positioning part; 313 - Positioning groove; 315 - Explosion-proof hole; 317 - Arc surface; 330 - Battery cell; 331 - Pole post; 333 - End face housing; 350 - Water cooling plate; 351 - Thermal conductive adhesive layer. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0033] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0035] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they should not be understood as indicating or implying relative importance.

[0036] As disclosed in the background art, due to the small volume of existing cylindrical battery cells, a relatively large number of them are arranged in a battery pack. And because a complex series-parallel structure needs to be adopted, the electrical isolation protection between battery cells and the electrical isolation protection between the connection row and the battery cell are quite important. That is, the welding part of the top cover of the battery cell needs to be well protected by intervals, and an interval protection structure also needs to be arranged between battery cells to avoid short circuits. In the conventional technology, usually through the way of spatial intervals, air intervals are used for electrical isolation, and the risk of short circuits is relatively large.

[0037] In addition, for conventional cylindrical battery cores, serpentine plates are usually used for cooling during cooling, and a glue-limiting structure needs to be set between the cold plate and the battery core, and the installation is complex.

[0038] To solve the above problems, the embodiments of the present invention provide a new type of limit isolation row, integrated busbar and battery pack. It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0039] See Figures 1 to 3 , the embodiments of the present invention provide a limit isolation row 100, which is used to achieve electrical isolation between multiple battery cells 330, can effectively avoid short circuits between the battery cell 330 and adjacent battery cells 330 or the electrical connection row 210, reduce the short circuit risk, and improve the safety of the battery.

[0040] The limiting isolation row 100 provided by the embodiment of the present invention is used to be arranged on a plurality of battery cells 330. The end face of the battery cell 330 is provided with a pole 331 and an end face housing 333 that are electrically isolated from each other. The limiting isolation row 100 includes a plurality of isolation units 110 and a connecting portion 170 connecting the plurality of isolation units 110. Each isolation unit 110 includes an annular insulating portion 130 and an insulating covering portion 150. The annular insulating portion 130 encloses to form a socket hole 131 and is configured to be sleeved on the circumferential surface of the battery cell 330 to electrically isolate adjacent battery cells 330. The insulating covering portion 150 is arranged at one end of the annular insulating portion 130 and is partially hollowed out to form an avoidance hole 151 communicating with the socket hole 131. The insulating covering portion 150 is configured to be arranged on the end face housing 333 and expose the pole 331 and a part of the end face housing 333 through the avoidance hole 151.

[0041] It should be noted that in this embodiment, the battery cell 330 is a cylindrical battery, and a plurality of cylindrical batteries are arranged and distributed in the battery pack 300. In actual use, the limiting isolation row 100 can be sleeved on the top of the battery cell 330, and the annular insulating portion 130 is sleeved around the top of the battery cell 330, so as to form insulation protection, avoid the tops of adjacent battery cells 330 from approaching and contacting each other, and effectively avoid the short circuit between the end face housings 333 at the tops of adjacent battery cells 330. The insulating covering portion 150 can partially cover the end face housing 333, and a connecting row 210 can be arranged above the area covered by the insulating covering portion 150. The insulating covering portion 150 can effectively avoid the short circuit between the connecting row 210 and the lower end face housing 333.

[0042] It is worth noting that in this embodiment, the annular insulating portion 130 and the insulating covering portion 150 can be integrally formed, and the diameter of the socket hole 131 formed by enclosing the annular insulating portion 130 can be adapted to the diameter of the battery cell 330, so as to facilitate the annular insulating portion 130 to be sleeved on the battery cell 330 and remain fixed. In addition, the limiting isolation row 100 can be made of insulating polymer materials and has good insulation properties. Commonly used ones are PC, ABS, PA6, PA66, PBT, PMMA, PP, HDPE, etc. At the same time, in order to improve the thermal conductivity of the limiting isolation row 100, in this embodiment, some thermal conductive materials can be added and doped into the material, and in order to meet the insulation performance, the thermal conductive materials are inorganic non-metallic materials, such as metal oxides (Al2O3, MgO, ZnO, NiO), metal nitrides (AlN, Si3N4, BN), and SiC ceramics. Since the limiting isolation row 100 has good thermal conductivity, it can improve the heat dissipation performance of the battery cell 330, which is beneficial to the temperature reduction and low-temperature heating performance of the battery core 330.

[0043] In some embodiments, adjacent annular insulating portions 130 are spaced apart from each other to form a gap space, and adjacent insulating covering portions 150 are connected to each other through a connecting portion 170. The connecting portion 170 is provided with a potting diversion hole 171, and the potting diversion hole 171 communicates with the gap space. Specifically, the distribution positions of the annular insulating portions 130 correspond to the distribution positions of a plurality of battery cells 330. Since there is a gap between the battery cells 330, there is also a certain gap space between adjacent annular insulating portions 130, and the positions corresponding to this gap space are connected by the connecting portion 170. The potting diversion hole 171 on the connecting portion 170 can achieve diversion during potting, facilitating the smooth entry of glue into the space between adjacent battery cells 330.

[0044] It should be noted that in this embodiment, the insulating covering portion 150 and the connecting portion 170 form a flat structure, so as to ensure reliable connection of a plurality of isolation units 110 and easy preparation. Moreover, the potting diversion hole 171 is arranged at the central position of three adjacent annular insulating portions 130, so that the potting diversion hole 171 can communicate with the gap space between three adjacent annular insulating portions, and the diversion effect on the glue is better.

[0045] In some embodiments, the connecting portion 170 is provided with a fixing rivet post 153, and the fixing rivet post 153 is configured to be riveted to the connecting row 210. Specifically, the connecting portion 170 is provided with a riveting hole, and the fixing rivet post 153 passes through the connecting row 210 and is riveted in this riveting hole, thereby realizing the riveting between the connecting row 210 and the connecting portion 170. Thus, both the connecting row 210 and the low-voltage acquisition component can be riveted and fixed together through the fixing rivet post 153 to ensure the fixing effect on the connecting row 210. Of course, in other preferred embodiments of the present invention, the fixing rivet post 153 can also be arranged on the insulating covering portion 150, or arranged on both the insulating covering portion 150 and the connecting portion 170 at the same time, and it can also achieve the hot riveting and fixing effect on the connecting row 210.

[0046] In some embodiments, the avoidance hole 151 includes a pole post avoidance area 155 and an end shell avoidance area 157 that are connected to each other along a first direction. The pole post avoidance area 155 is circular, and the pole post avoidance area 155 is configured to be adapted to the pole post 331 for the pole post 331 to pass through. The end shell avoidance area 157 is fan-shaped and is configured to expose a part of the end face shell 333, and a plurality of end shell avoidance areas 157 are arranged at intervals along the first direction. Specifically, the annular insulating portion 130 is circular, the pole post avoidance area 155 is concentric with the socket hole 131, and the shape of the pole post avoidance area 155 is adapted to the shape of the pole post 331, so as to just expose the technology, while the end shell avoidance area 157 can expose a part of the end face shell 333 to facilitate the electrical connection of adjacent connecting rows 210.

[0047] In some embodiments, the projected area of the insulating cover portion 150 in the axial direction is larger than the area of the end housing avoidance area 157. Specifically, the area of the insulating cover portion 150 is larger than half of the area of the ring where it is located, so as to ensure that the insulating cover portion 150 has sufficient coverage area to ensure electrical isolation between the connection row 210 and the end face housing 333.

[0048] See Figures 4 to 6 In addition, an embodiment of the present invention further provides an integrated busbar 200, including a connection row 210 and the aforementioned limit isolation row 100. The limit isolation row 100 includes a plurality of isolation units 110 and a connection portion 170 connecting the plurality of isolation units 110. Each isolation unit 110 includes an annular insulating portion 130 and an insulating cover portion 150. The annular insulating portion 130 defines a socket hole 131 and is configured to be sleeved on the circumferential surface of the battery cell 330 to electrically isolate adjacent battery cells 330. The insulating cover portion 150 is disposed at one end of the annular insulating portion 130 and is partially hollowed out to form an avoidance hole 151 communicating with the socket hole 131. The insulating cover portion 150 is configured to be disposed on the end face housing 333 and expose the pole post 331 and a part of the end face housing 333 through the avoidance hole 151. The connection row 210 includes a plurality of interconnected connection pieces 211. One end of each connection piece 211 is configured to pass through the avoidance hole 151 of the battery cell 330 and connect to the pole post 331 of the battery cell 330, and the other end is configured to cross over the insulating cover portion 150 of the battery cell 330 and pass through the avoidance hole 151 of the adjacent battery cell 330 to connect to the end face housing 333 of the adjacent battery cell 330.

[0049] It should be noted that the insulating cover portion 150 can electrically isolate the upper connection piece 211 from the lower end housing, thereby preventing the connection piece 211 from being electrically connected to the pole post 331 and the end face housing 333 of the same battery cell 330 simultaneously, which may cause a short circuit.

[0050] In some embodiments, the connection pieces 211 connect two adjacent battery cells 330 in a first direction, and a plurality of connection pieces 211 are interconnected in a second direction by connection fixing pieces 213. The connection fixing pieces 213 are connected to the isolation units 110 or the connection portion 170, and the second direction is perpendicular to the first direction. Specifically, connection fixing pieces 213 are provided between adjacent connection pieces 211, and both ends of each connection fixing piece 213 are respectively connected to the adjacent connection pieces 211. Preferably, the connection fixing pieces 213 are connected to the isolation units 110 through fixing rivet posts 153.

[0051] In some embodiments, the integrated busbar 200 further includes a collection row 230. The collection row 230 is disposed on a side of the connection row 210 away from the limit isolation row 100, that is, the collection row 230 is disposed above the connection row 210, and can realize voltage collection and temperature collection.

[0052] See Figures 6 to 10 Figures 6 to 10 , an embodiment of the present invention further provides a battery pack 300, including a base 310, a plurality of battery cells 330, and an integrated busbar 200. The integrated busbar 200 includes a connection row 210 and the aforementioned limiting and isolating row 100. The limiting and isolating row 100 includes a plurality of isolation units 110 and a connection part 170 connecting the plurality of isolation units 110. Each isolation unit 110 includes an annular insulating part 130 and an insulating covering part 150. The annular insulating part 130 encloses a socket hole 131 and is configured to be socketed on the circumferential surface of the battery cell 330 to electrically isolate adjacent battery cells 330. The insulating covering part 150 is arranged at one end of the annular insulating part 130 and is partially hollowed out to form an avoidance hole 151 communicating with the socket hole 131. The insulating covering part 150 is configured to be arranged on the end face housing 333 and expose the pole column 331 and part of the end face housing 333 through the avoidance hole 151. The connection row 210 includes a plurality of connected connection pieces 211. One end of each connection piece 211 is configured to pass through the avoidance hole 151 of the battery cell 330 and connect to the pole column 331 of the battery cell 330, and the other end is configured to straddle the insulating covering part 150 of the battery cell 330 and pass through the avoidance hole 151 of the adjacent battery cell 330 to connect to the end face housing 333 of the adjacent battery cell 330. The plurality of battery cells 330 are arranged on the base 310. One end of each battery cell 330 away from the base 310 is provided with a pole column 331 and an end face housing 333 that are electrically isolated from each other. The limiting and isolating row 100 is arranged at one end of the plurality of battery cells 330 away from the base 310. The plurality of annular insulating parts 130 are correspondingly socketed on the circumferential surfaces of the plurality of battery cells 330, and the plurality of insulating covering parts 150 are correspondingly attached to the plurality of end face housings 333 and expose the pole column 331 and part of the end face housing 333 through the avoidance holes 151.

[0053] It should be noted that the battery cell 330 here is a cylindrical battery and is arranged on the base 310 in an array manner. A pole column 331 is provided at the top end of the battery cell 330, and the limiting and isolating row 100 is arranged at the top end of the battery cell 330.

[0054] In some embodiments, a plurality of protruding positioning portions 311 are provided on the base 310. A plurality of positioning grooves 313 are formed by cooperation among the plurality of protruding positioning portions 311. The plurality of battery cells 330 are respectively assembled in the plurality of positioning grooves 313. Specifically, the protruding positioning portions 311 are integrally provided on the base 310, and the positioning grooves 313 are circular. At least one arc surface 317 is formed on the side wall of each protruding positioning portion 311. The arc surface 317 is attached to the peripheral surface of the corresponding battery cell 330. The side walls of the plurality of protruding positioning portions 311 can be arranged along the same circumference, so as to fix the battery cell 330 in the positioning groove 313. By setting the protruding positioning portions 311 to fix the bottom end of the battery cell 330, the weight of the base 310 can be reduced, and the thickness of the base 310 can be decreased. At the same time, the installation margin of the positioning groove 313 is larger, and the battery cell 330 can be more smoothly inserted.

[0055] In other preferred embodiments of the present invention, the positioning groove 313 can also be directly formed by grooving on the surface of the base 310, which can also achieve the fixation of the plurality of battery cells 330.

[0056] In some embodiments, an explosion-proof hole 315 is further provided in each positioning groove 313. The plurality of explosion-proof holes 315 are correspondingly arranged with one end of the plurality of battery cells 330 far away from the limit isolation row 100. Specifically, an explosion-proof valve can be provided at the bottom end of the battery cell 330. The explosion-proof hole 315 is correspondingly arranged with the explosion-proof valve. When thermal runaway occurs, the explosion-proof valve opens, and the thermal runaway gas can be discharged into the exhaust passage below the base 310 through the explosion-proof hole 315 to achieve exhaust and slow down the thermal spread.

[0057] Furthermore, the battery pack 300 further includes a water-cooling plate 350. The water-cooling plate 350 is arranged between the plurality of battery cells 330 along the first direction. The annular insulating portion 130 is provided between the water-cooling plate 350 and the peripheral surface of the battery cell 330, so that the water-cooling plate 350 is spaced from the peripheral surface of the battery cell 330. Specifically, the water-cooling plate 350 can be serpentinely distributed among the plurality of battery cells 330, and the water-cooling plate 350 is in contact with the annular insulating portion 130. Since the annular insulating portion 130 has good thermal conductivity, heat transfer between the water-cooling plate 350 and the battery cell 330 can be better achieved, and the heat dissipation effect of the water-cooling plate 350 can be improved.

[0058] In some embodiments, a connecting portion 170 is provided on the water-cooling plate 350 to limit the water-cooling plate 350. Specifically, the connecting portion 170 is located above the water-cooling plate 350, so as to limit the water-cooling plate 350 in the vertical direction.

[0059] In some embodiments, a thermal conductive adhesive layer 351 is formed by coating the gap between the water-cooling plate 350 and the peripheral surface of the battery cell 330. The thermal conductive adhesive layer 351 is configured to achieve heat transfer between the water-cooling plate 350 and the battery cell 330. Specifically, since the annular insulating portion 130 has a certain thickness and the water-cooling plate 350 is in contact with the annular insulating portion 130, there is a certain gap between the water-cooling plate 350 and the peripheral surface of the battery cell 330. This gap can be coated with a thermal conductive adhesive to form the thermal conductive adhesive layer 351, and the thickness of the thermal conductive adhesive layer 351 can be determined by the thickness of the annular insulating portion 130. Through the annular insulating portion 130, not only can the contact between the water-cooling plate 350 and the battery cell 330 be effectively isolated, but also the thickness of the thermal conductive adhesive layer 351 is effectively limited, ensuring the uniformity of glue coating.

[0060] In summary, for the limiting and isolating row 100, the integrated busbar 200, and the battery pack 300 provided in the embodiments of the present invention, the annular insulating portion 130 is sleeved on the peripheral surface of the battery cell 330 by using the socket hole 131 formed by the annular insulating portion 130, so that adjacent battery cells 330 are electrically isolated. At the same time, the insulating covering portion 150 is provided on the end face housing 333 and is partially hollowed out to form an avoidance hole 151 exposing the pole column 331 and a part of the end face housing 333. During actual assembly, the annular insulating portion 130 can cover the peripheral surface of the battery cell 330, so that adjacent battery cells 330 can be separated, thereby achieving electrical isolation between adjacent battery cells 330. The end face and the pole column 331 of the battery cell 330 can be used as the negative electrode and the positive electrode respectively. The insulating covering portion 150 can expose the pole column 331 through the avoidance hole 151, facilitating the connection between the electrical connection row 210 and the pole column 331. At the same time, the insulating covering portion 150 can separate the connection row 210 from the end face housing 333 of the battery cell 330 below, so that the connection row 210 is electrically isolated from the end face housing 333 of the battery cell 330. Compared with the prior art, the insulating isolation member provided in the embodiments of the present invention can effectively prevent the battery cell 330 from short-circuiting with adjacent battery cells 330 or the connection row 210, reduce the short-circuit risk, and improve the safety of the battery.

[0061] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A limiting isolation row is used to be arranged on a plurality of battery cells (330). End faces of the battery cells (330) are provided with a pole column (331) and an end face housing (333) which are electrically isolated from each other. It is characterized in that, The limiting isolation row includes a plurality of isolation units (110) and a connecting portion (170) connecting the plurality of isolation units (110). Each isolation unit (110) includes an annular insulating portion (130) and an insulating covering portion (150). The annular insulating portion (130) encloses and forms a socket hole (131), and is configured to be sleeved on the circumferential surface of the battery cell (330) to electrically isolate adjacent battery cells (330). The insulating covering portion (150) is disposed at one end of the annular insulating portion (130) and is partially hollowed out to form an avoidance hole (151) communicating with the socket hole (131). The insulating covering portion (150) is configured to be disposed on the end face housing (333), and expose the pole post (331) and a part of the end face housing (333) through the avoidance hole (151).

2. The limit isolation row according to claim 1, wherein Adjacent annular insulating portions (130) are spaced apart from each other and form a gap space, and adjacent insulating covering portions (150) are connected to each other through the connecting portion (170). The connecting portion (170) is provided with a glue filling and guiding hole (171), and the glue filling and guiding hole (171) communicates with the gap space.

3. The limit isolation row according to claim 1, characterized in that, Fixing rivet posts (153) are provided on the insulating covering portion (150) and / or the connecting portion (170), and the fixing rivet posts (153) are configured to be riveted to the connecting row (210).

4. The limit isolation row according to claim 2, wherein The avoidance hole (151) includes a pole post avoidance area (155) and an end housing avoidance area (157) connected to each other in a first direction. The pole post avoidance area (155) is circular, and the pole post avoidance area (155) is configured to be adapted to the pole post (331) for the pole post (331) to pass through. The end housing avoidance area (157) is fan-shaped and is configured to expose a part of the end face housing (333). A plurality of end housing avoidance areas (157) are arranged at intervals in the first direction.

5. An integrated busbar, characterized in that, It includes a connecting row (210) and the limiting isolation row according to any one of claims 1-4. The connecting row (210) includes a plurality of connected connecting pieces (211). One end of each connecting piece (211) is configured to pass through the avoidance hole (151) of the battery cell and connect to the pole post (331) of the battery cell, and the other end is configured to cross the insulating covering portion (150) of the battery cell and pass through the avoidance hole (151) of the adjacent battery cell to connect to the end face housing (333) of the adjacent battery cell (330).

6. The integrated busbar according to claim 5, characterized in that, The connecting piece (211) connects two adjacent battery cells (330) in a first direction, and a plurality of connecting pieces (211) are connected to each other in a second direction through a connecting fixing piece (213). The connecting fixing piece (213) is connected to the isolation unit (110) or the connecting portion (170), and the second direction is perpendicular to the first direction.

7. A battery pack, characterized in that, It includes a base (310), a plurality of battery cells (330), and an integrated busbar as described in any one of claims 5-6. The plurality of battery cells (330) are disposed on the base (310). At one end of each battery cell (330) away from the base (310), there are provided a pole column (331) and an end face housing (333) that are electrically isolated from each other. The limiting and isolating row is disposed at one end of the plurality of battery cells (330) away from the base (310). A plurality of the annular insulating parts are correspondingly sleeved on the circumferences of the plurality of battery cells (330). A plurality of the insulating covering parts (150) are correspondingly attached to the plurality of end face housings (333), and the pole column (331) and a part of the end face housing (333) are exposed through the avoidance holes (151).

8. The battery pack according to claim 7, wherein A plurality of convex positioning parts (311) are provided on the base (310). A plurality of positioning grooves (313) are formed by cooperation between the plurality of convex positioning parts (311). The plurality of battery cells (330) are respectively assembled in the plurality of positioning grooves (313); An explosion-proof hole (315) is further provided in each positioning groove (313). The plurality of explosion-proof holes (315) are correspondingly arranged at one end of the plurality of battery cells (330) away from the limiting and isolating row; At least one arc surface (317) is formed on the side wall of each convex positioning part (311). The arc surface (317) is attached to the circumference of the corresponding battery cell (330).

9. The battery pack according to claim 7, wherein, The battery pack further includes a water-cooling plate (350). The water-cooling plate (350) is disposed between the plurality of battery cells (330) along a first direction. The annular insulating part (130) is disposed between the water-cooling plate (350) and the circumferences of the battery cells (330) to space the water-cooling plate (350) from the circumferences of the battery cells (330); The connecting part (170) is disposed on the water-cooling plate (350) to limit the water-cooling plate (350).

10. The battery pack according to claim 9, characterized in that, A thermal conductive adhesive layer (351) is formed by coating the gap between the water-cooling plate (350) and the circumferences of the battery cells (330). The thermal conductive adhesive layer (351) is configured to achieve heat transfer between the water-cooling plate (350) and the battery cells (330).

Images