Isolation assembly and battery

Abstract

The utility model relates to an isolation assembly and a battery, and is used for isolating a battery cell and a liquid cooling part of the battery, an electrode assembly of the battery cell is inversely arranged, and the isolation assembly comprises a bus piece electrically connected with the electrode assembly; the isolation piece and the electrode assembly are arranged on the two opposite sides of the confluence piece in the first direction respectively and connected with the confluence piece; wherein a heat conduction avoiding hole is formed in the isolation piece, and the confluence piece is exposed through the heat conduction avoiding hole so as to exchange heat with the liquid cooling component; the FPC assembly is connected to the middle of the isolation piece in the third direction, and the FPC assembly and the convergence piece are arranged on the same side of the isolation piece in the first direction; the plurality of confluence pieces are arranged at intervals along a third direction and are connected to two sides of the FPC assembly along a second direction, so that the FPC assembly is electrically connected with the confluence pieces; according to the utility model, the normal heat exchange between the battery cell pole and the liquid cooling system after the battery cell is inverted and the stability of the integrated electrical connection between the busbar and the FPC can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to an isolation component and a battery. Background Art

[0002] A battery pack usually consists of battery cells, buses, FPCs (flexible printed circuits) and liquid cooling systems. In the design of a snap-on battery pack, the battery cells need to be inverted so that the busbars, battery poles and FPCs of the snap-on battery pack are all at the bottom of the battery cells. Considering that the liquid cooling system and the busbars need to exchange heat, if the busbars and FPC integration are not fixed, normal heat exchange between the battery poles, busbars and liquid cooling system cannot be guaranteed after the battery cells are inverted, and the electrical connection between the busbars and FPC integration will also become loose, and the quality of the battery pack cannot be guaranteed. Utility Model Content

[0003] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art that normal heat exchange between the cell poles and the liquid cooling system and the electrical connection between the bus and FPC cannot be guaranteed after the battery cell is inverted, and then provide an isolation component and a battery to ensure normal heat exchange between the cell poles and the bus and the liquid cooling system and the stability of the electrical connection between the bus and FPC after the battery cell is inverted.

[0004] In the first aspect, in order to solve the above technical problems, the present invention provides an isolation assembly for isolating a battery cell and a liquid cooling component, wherein the electrode assembly of the battery cell is inverted, and the isolation assembly includes:

[0005] a busbar electrically connected to the electrode assembly;

[0006] an isolating member, the isolating member and the electrode assembly being disposed on opposite sides of the busbar along a first direction and connected thereto; wherein the isolating member is provided with a heat conduction avoidance hole, the busbar being exposed through the heat conduction avoidance hole to exchange heat with the liquid cooling component;

[0007] An FPC assembly is connected to the middle of the isolating member along a third direction, and the FPC assembly and the busbar are both arranged on the same side of the isolating member along the first direction; a plurality of the busbars are arranged at intervals along the third direction and connected to both sides of the FPC assembly along the second direction, so that the FPC assembly is electrically connected to the busbar.

[0008] In one embodiment of the present invention, the busbar is laser welded to the FPC assembly through a nickel sheet; a welding avoidance hole for avoiding the nickel sheet is opened on the isolation piece, and the nickel sheet is welded through the welding avoidance hole to form an electrical connection between the FPC assembly and the busbar.

[0009] In one embodiment of the present invention, the electrode assembly is provided with a plurality of poles at intervals along the second direction, and the busbar is provided with a plurality of plug-in slots for use with the poles at intervals along the second direction, and the plurality of poles are respectively inserted into the plurality of plug-in slots so that the two are electrically connected.

[0010] In one embodiment of the present invention, the isolation member includes a support surface and a plurality of limit grooves, wherein the plurality of limit grooves are spaced apart along the second direction and symmetrically located on both sides of the support surface, wherein the two limit grooves close to the support surface are connected to the side edges of the support surface along the third direction, and when the busbar is connected to the isolation member, the plug-in slot is accommodated in the limit groove, and the FPC assembly abuts against the support surface along the first direction.

[0011] In one embodiment of the present invention, a plurality of reinforcing ribs are provided in the limiting groove, and the plurality of reinforcing ribs are arranged at intervals along the third direction.

[0012] In one embodiment of the present invention, a plurality of connectors are connected between two adjacent limiting grooves to form a plurality of heat-conducting avoidance holes; the busbar also includes a connecting portion connected between the plug-in grooves, and the connecting portion is exposed through the heat-conducting avoidance holes.

[0013] In one embodiment of the present invention, a plurality of rivet holes are formed on the support surface, and the plurality of rivet holes are arranged at intervals along the third direction, and the FPC assembly and the spacer are riveted through the rivet holes;

[0014] A first limiting column is provided on the limiting groove. The first limiting column is protruded along the first direction toward one side of the current collector, so that the current collector and the first limiting column are riveted together.

[0015] In a second aspect, to solve the above technical problems, the present invention further provides a battery, comprising the aforementioned isolation assembly, and further comprising:

[0016] Box;

[0017] a liquid cooling component housed in the box to form an inner bottom surface of the box;

[0018] A battery cell is housed in the box; wherein the electrode assembly of the battery cell is arranged toward the liquid cooling component;

[0019] The isolation assembly is disposed in the box and between the battery core and the liquid cooling component along a first direction;

[0020] The electrode assembly is electrically connected to the current collector; the isolating member is connected to the liquid cooling component; and the current collector is exposed through the heat conduction avoidance hole to perform heat exchange with the liquid cooling component.

[0021] In one embodiment of the present invention, a heat conducting member is further included, and the heat conducting member is arranged between the liquid cooling component and the isolation member along the first direction.

[0022] In one embodiment of the present invention, a second limiting column is provided on the limiting groove of the isolation assembly, and the second limiting column is protruded along the first direction toward one side of the liquid cooling component so that the isolation component is riveted to the liquid cooling component through the second limiting column.

[0023] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0024] The isolation assembly and battery described in the present invention are characterized in that the isolation member is arranged between the busbar and the liquid-cooling component to form insulation between the busbar and the liquid-cooling component; the isolation member is provided with a heat-conducting avoidance hole, so that the busbar and the liquid-cooling component are insulated while the heat is transferred to the liquid-cooling component through the heat-conducting avoidance hole, which not only realizes insulation and isolation between the busbar and the liquid-cooling component, but also realizes normal heat exchange between the busbar and the liquid-cooling component; the isolation members are all connected to the busbar and the FPC assembly, and the busbar and the FPC assembly are integrated into one through the isolation member, thereby ensuring the stability of the electrical connection between the busbar and the FPC assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model and in conjunction with the accompanying drawings, wherein

[0026] Figure 1 This is a schematic structural diagram of an isolation assembly in a preferred embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A partial enlarged view of point C is shown;

[0028] Figure 3 A schematic structural diagram of the connection between the liquid cooling component, the isolation assembly, and the nickel sheet in a preferred embodiment of the present invention;

[0029] Figure 4 for Figure 3 A partial enlarged view of point B shown;

[0030] Figure 5 This is a side sectional view of a battery in a preferred embodiment of the present utility model;

[0031] Figure 6 for Figure 5 A partial enlarged view of point A shown;

[0032] Figure 7 This is a schematic structural diagram of an isolation member in a preferred embodiment of the present utility model;

[0033] Figure 8 This is a structural diagram of a current collector in a preferred embodiment of the present invention;

[0034] Figure 9 for Figure 7 Another structural schematic diagram of the isolation member shown;

[0035] Figure 10 This is an exploded view of a battery in a preferred embodiment of the present utility model;

[0036] Explanation of the reference numerals in the accompanying drawings in the specification: 1. Battery cell; 11. Pole; 2. Isolation assembly; 21. Isolation piece; 211. Second limiting post; 212. First limiting post; 213. Reinforcement rib; 214. Heat conduction avoidance hole; 215. Riveted hole; 216. Welding avoidance hole; 217. Support surface; 218. Limiting groove; 219. Connector; 22. FPC assembly; 23. Busbar; 231. Connecting part; 232. Plug-in slot; 24. Nickel sheet; 3. Heat conduction piece; 4. Box body; 41. Liquid cooling channel; X, third direction; Y, second direction; Z, first direction. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0038] Example 1

[0039] Reference Figure 1 and 2 As shown, in one embodiment of the present utility model, an isolation component is disclosed for isolating the battery cell 1 and the liquid cooling component of the battery to prevent leakage of the battery cell 1. A liquid cooling channel 41 is provided inside the liquid cooling component for circulating the heat transfer medium. The electrode assembly of the battery cell 1 is inverted. The inverted arrangement means that the electrode assembly is arranged at the bottom of the battery cell. The isolation component includes:

[0040] The busbar 23 is used to electrically connect the electrode assembly and is made of copper or aluminum with excellent electrical conductivity;

[0041] The isolator 21 is a plate-like structure made of an insulating material. The isolator 21 and the electrode assembly are disposed on opposite sides of the busbar 23 along a first direction Z and are connected thereto. The isolator 21 is located between the liquid-cooling component and the busbar 23 to isolate the busbar 23 from the liquid-cooling component and prevent electrical leakage from the busbar 23. The isolator 21 is provided with a plurality of heat-conducting avoidance holes 214 spaced apart along a third direction X. The busbar 23 is exposed through the heat-conducting avoidance holes 214 to exchange heat with the liquid-cooling component. In this embodiment, the first direction Z is the vertical direction, and the third direction X is the horizontal direction.

[0042] The FPC assembly 22 is a collection line, which is connected to the middle of the isolation member 21 along the third direction X, and the FPC assembly 22 and the busbar 23 are both arranged on the same side of the isolation member 21 along the first direction Z; multiple busbars 23 are arranged at intervals along the third direction X and connected to both sides of the FPC assembly 22 along the second direction Y, so that the FPC assembly 22 is electrically connected to the multiple busbars 23 on both sides thereof.

[0043] Reference Figure 3 and 4 As shown, the busbar 23 is electrically connected to the FPC assembly 22 through laser welding of the nickel sheet 24; a plurality of welding avoidance holes 216 for avoiding the nickel sheet 24 are provided on the isolating member 21 and are spaced apart along the third direction X. Each busbar 23 corresponds to a welding avoidance hole 216, and the welding gun passes through the welding avoidance hole 216 to weld the nickel sheet 24, so that the FPC assembly 22 and the busbar 23 form a stable electrical connection.

[0044] Reference Figure 5 and 6 As shown, the electrode assembly is provided with three poles 11 at intervals along the second direction Y, and the poles 11 are provided to protrude downward, and the busbar 23 is provided with three plug-in slots 232 for use with the poles 11 at intervals along the second direction Y. The width of the plug-in slots 232 at the notch is smaller than the width of the slot bottom, and the width of the pole 11 is larger than the width of the notch. During assembly, the three poles 11 are respectively inserted into the three plug-in slots 232 from above, and the poles 11 are pressed by the side walls of the notch of the plug-in slots 232 so that the poles 11 are limited in the first direction Z and the second direction Y. In this embodiment, the second direction Y is the horizontal direction.

[0045] Reference Figure 7As shown, the isolating member 21 includes a supporting surface 217 and six limiting grooves 218 located on the same side. The supporting surface 217 is located in the middle of the isolating member 21. The six limiting grooves 218 are arranged at intervals along the second direction Y and are symmetrically located on both sides of the supporting surface 217. Among them, the two limiting grooves 218 close to the supporting surface 217 are connected to the side of the supporting surface 217 along the third direction X. When the busbar 23 is connected to the isolating member 21, the plug-in slot 232 is accommodated in the limiting slot 218, and the FPC assembly 22 abuts against the supporting surface 217 along the first direction Z.

[0046] Reference Figure 9 As shown, the welding avoidance hole 216 extends from the supporting surface 217 to the limiting groove 218 so that the welding gun can fully weld the nickel sheet 24, the busbar 23 and the FPC assembly 22.

[0047] Reference Figure 7 As shown, a plurality of reinforcing ribs 213 are fixedly connected in the limiting groove 218, and the plurality of reinforcing ribs 213 are arranged at intervals along the third direction X. The reinforcing ribs 213 are of an "concave" shape, and both sides of the reinforcing ribs 213 abut against the two side walls of the limiting groove 218 to improve the structural strength of the limiting groove 218.

[0048] Reference Figure 7 As shown, a plurality of connectors 219 spaced apart along the third direction are connected between two adjacent limiting grooves 218, and a heat conduction avoidance hole 214 is formed between two adjacent connectors 219. Optionally, in the third direction, the length of the connector 219 is shorter than the length of the heat conduction avoidance hole 214, which is beneficial to heat dissipation and can also achieve a lightweight structure of the isolation member 21.

[0049] Reference Figure 8 As shown, the busbar 23 also includes a connecting portion 231 connected between two adjacent plug-in slots 232. The connecting portion 231 is used to connect two adjacent plug-in slots 232. The connecting portion 231 is exposed through the heat-conducting avoidance hole 214 to transfer heat to the liquid-cooling component. Optionally, the connecting portion 231 is set to a flat structure. Since the heat of the busbar 23 needs to be transferred to the liquid-cooling component, the flat structure can increase the heat dissipation area of ​​the busbar 23 and improve the heat dissipation efficiency; the two side walls of the plug-in slot 232 are provided with multiple gaps, which are conducive to the heat dissipation of the busbar 23.

[0050] Reference Figure 7 As shown, optionally, for two adjacent limiting grooves, the reinforcing rib is located at the connection between the connecting piece and the limiting groove.

[0051] Reference Figure 7As shown, a plurality of rivet holes 215 are provided on the support surface 217. The plurality of rivet holes 215 are arranged at intervals along the third direction X. The FPC assembly 22, the liquid cooling component, and the spacer 21 are fixedly riveted together through the rivet holes 215 to position the FPC assembly 22. Optionally, the bottom surface of the FPC assembly 22 and the support surface 217 are further bonded together by glue.

[0052] A plurality of first limiting columns 212 are provided on the bottom wall of the limiting groove 218 and are distributed at intervals along the third direction X. The first limiting columns 212 are protruding along the first direction Z toward one side of the busbar 23. A limiting hole is provided in the plug-in groove 232 of the busbar 23 corresponding to the first limiting column 212, so that the busbar 23 and the isolating member 21 are riveted by a hot riveting process for positioning the busbar 23. In this way, a plurality of busbars 23 are integrated on the isolating plate 2. Optionally, the limiting groove 218 and the plug-in groove 232 are also bonded by glue.

[0053] Example 2

[0054] Reference Figure 10 As shown, in order to solve the above technical problems, the present invention further provides a battery, comprising the isolation assembly in embodiment 1, and further comprising:

[0055] Box 4;

[0056] The liquid cooling component is accommodated in the box body 4 to form the inner bottom surface of the box body 4. The liquid cooling part is provided with a liquid cooling channel 41 for the circulation of the heat transfer medium;

[0057] The battery cell 1 is housed in the box 4 and the electrode assembly is located at the bottom of the battery cell 1; wherein the electrode assembly of the battery cell 1 is arranged toward the liquid cooling component;

[0058] The isolation assembly is disposed in the box body 4 and is disposed between the battery core 1 and the liquid cooling component along the first direction Z;

[0059] The electrode assembly is electrically connected to the busbar 23 ; the isolating member 21 is connected to the liquid cooling component; and the busbar 23 is exposed through the heat conduction avoidance hole 214 to perform heat exchange with the liquid cooling component.

[0060] Reference Figure 6 As shown, it also includes a heat conductor 3 padded on the upper surface of the liquid-cooling channel 41. The heat conductor 3 is arranged between the liquid-cooling component and the isolation component 21 along the first direction Z, and serves as a heat-conducting medium to fully transfer the heat on the bus 23 to the liquid-cooling component. The heat conductor 3 also serves as an insulating medium to separate the bus and the liquid-cooling component. A heat conductor avoidance groove is also provided on the side of the isolation component 21 opposite to the limiting groove 218. The heat conductor avoidance groove is opposite to and passes through the heat-conducting avoidance hole 214. The heat conductor 3 is located in the heat conductor avoidance groove so that the bus 23 directly contacts the heat conductor 3 through the heat-conducting avoidance hole 214.

[0061] Reference Figure 9 As shown, the bottom wall of the limiting groove 218 of the isolation assembly is provided with a second limiting column 211, and the second limiting column 211 is protruded along the first direction Z toward one side of the liquid cooling component so that the isolation member 21 is riveted to the liquid cooling component through the second limiting column 211.

[0062] The working principle of the isolation component and battery of the utility model is:

[0063] During assembly, first place the bus 23 and the FPC assembly 22 on the isolation piece 21 and fix them together to realize the integrated integration of the isolation piece 21, the bus 23 and the FPC assembly 22, ensure that the bus 23 and the FPC assembly 22 are stably connected, and then weld the bus 23 and the FPC assembly 22 through the nickel sheet 24 to realize the stable electrical connection between the bus 23 and the FPC assembly 22. The isolation piece 21, the bus 23 and the FPC assembly 22 are placed as a whole on the liquid cooling component and fixedly connected to the box body 4. When the inverted battery cell 1 is placed in the box body 4, the pole 11 is pressed from top to bottom into the plug-in slot 232 of the bus 23 to realize the electrical connection between the bus 23 and the pole 11. The heat generated by the pole 11 of the battery cell and the bus 23 is transferred to the heat conductor 3, and then transferred from the heat conductor 3 to the heat conducting medium in the liquid cooling component, and the bus and the liquid cooling component realize normal heat exchange.

[0064] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An isolation assembly for isolating a battery cell (1) and a liquid cooling component of a battery, wherein: The electrode assembly of the battery cell (1) is arranged inverted, and is characterized in that the isolation assembly comprises: a busbar (23) electrically connected to the electrode assembly; An isolating member (21), wherein the isolating member (21) and the electrode assembly are arranged on opposite sides of the current collector (23) along a first direction (Z) and are connected thereto; wherein a heat conduction avoidance hole (214) is provided on the isolating member (21), and the current collector (23) is exposed through the heat conduction avoidance hole (214) to perform heat exchange with the liquid cooling component; An FPC assembly (22) is connected to the middle of the isolating member (21) along a third direction (X), and the FPC assembly (22) and the current collector (23) are both arranged on the same side of the isolating member (21) along the first direction (Z); a plurality of current collectors (23) are arranged at intervals along the third direction (X) and connected to both sides of the FPC assembly (22) along a second direction (Y), so that the FPC assembly (22) is electrically connected to the current collector (23).

2. An isolation assembly according to claim 1, characterized in that: The current collector (23) is laser-welded to the FPC assembly (22) via a nickel sheet (24); a welding avoidance hole (216) for avoiding the nickel sheet (24) is provided on the isolation member (21); the nickel sheet (24) is welded via the welding avoidance hole (216) to form an electrical connection between the FPC assembly (22) and the current collector (23).

3. An isolation assembly according to claim 1, characterized in that: The electrode assembly is provided with a plurality of poles (11) at intervals along the second direction (Y), the current collector (23) is provided with a plurality of plug-in slots (232) for use with the poles (11) at intervals along the second direction (Y), and the plurality of poles (11) are respectively inserted into the plurality of plug-in slots (232) so that the two are electrically connected.

4. An isolation assembly according to claim 3, characterized in that: The isolating member (21) includes a supporting surface (217) and a plurality of limiting grooves (218), wherein the plurality of limiting grooves (218) are spaced apart along the second direction (Y) and symmetrically located on both sides of the supporting surface (217), wherein two limiting grooves (218) close to the supporting surface (217) are connected to the side of the supporting surface (217) along the third direction (X), and when the busbar (23) is connected to the isolating member (21), the plug-in slot (232) is accommodated in the limiting groove (218), and the FPC assembly (22) abuts against the supporting surface (217) along the first direction (Z).

5. An isolation assembly according to claim 4, characterized in that: A plurality of reinforcing ribs (213) are provided in the limiting groove (218), and the plurality of reinforcing ribs (213) are arranged at intervals along the third direction (X).

6. An isolation assembly according to claim 4, characterized in that: A plurality of connecting members (219) are connected between two adjacent limiting grooves (218) to form a plurality of heat-conducting avoidance holes (214); the current collector (23) further comprises a connecting portion (231) connected between the plug-in grooves (232), and the connecting portion (231) is exposed through the heat-conducting avoidance holes (214).

7. An isolation assembly according to claim 4, characterized in that: A plurality of rivet holes (215) are provided on the support surface (217), the plurality of rivet holes (215) are arranged at intervals along a third direction (X), and the FPC assembly (22) and the isolation member (21) are riveted through the rivet holes (215); A first limiting column (212) is provided on the limiting groove (218), and the first limiting column (212) is protruded toward one side of the current collector (23) along the first direction (Z) so that the current collector (23) and the first limiting column (212) are riveted.

8. A battery, characterized in that: An isolation assembly according to any one of claims 1 to 7, further comprising: Box (4); a liquid cooling component housed in the box (4) to form an inner bottom surface of the box (4); A battery cell (1) is accommodated in the box (4); wherein the electrode assembly of the battery cell (1) is arranged toward the liquid cooling component; The isolation component is arranged in the box (4) and is arranged between the battery core (1) and the liquid cooling component along a first direction (Z); The electrode assembly is electrically connected to the current collector (23); the isolating member (21) is connected to the liquid cooling component; and the current collector (23) is exposed through the heat conduction avoidance hole (214) to perform heat exchange with the liquid cooling component.

9. A battery according to claim 8, characterized in that: It also includes a heat conducting member (3), which is arranged between the liquid cooling component and the isolation member (21) along the first direction (Z).

10. A battery according to claim 8, characterized in that A second limiting column (211) is provided on the limiting groove (218) of the isolation component, and the second limiting column (211) is protruded along the first direction (Z) toward one side of the liquid cooling component, so that the isolation member (21) is riveted to the liquid cooling component through the second limiting column (211).

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