CN219203314U - Battery top cap and group battery - Google Patents

Abstract

The application provides a battery top cover and a technical scheme of a battery pack. In the battery top cover, the positive pole post component is arranged on the top cover plate, the plastic under the positive pole in a penetrating way and is connected with the positive pole connecting sheet; the negative pole column component penetrates through the top cover plate and the negative pole lower plastic and is connected with the negative pole connecting sheet; the anode lower plastic and the cathode lower plastic are oppositely arranged at two ends of the top cover sheet; one end of the positive electrode connecting sheet is welded with the positive electrode post component by laser, and the other end of the positive electrode connecting sheet is connected with the plastic under the positive electrode; one end of the negative electrode connecting sheet is welded with the negative electrode column component by laser, and the other end of the negative electrode connecting sheet is connected with the lower plastic of the negative electrode; the middle part of positive connection piece is provided with positive pole arch structure, and the middle part of negative pole connection piece is provided with negative pole arch structure. According to the technical scheme, the safety of the battery pack can be improved, and the structural stability of the battery pack is improved.

Description

Battery top cap and group battery

Technical Field

The utility model relates to a battery top cover, and belongs to the technical field of battery production. The utility model also relates to a battery pack.

Background

With the increasing prominence of environmental problems, people start to actively advocate low-carbon economy. New energy automobiles are rising with increasingly severe air quality. A wide range of manufacturers and consumers are also beginning to recognize hybrid vehicles and pure electric vehicles as representative new energy vehicles. The power battery is used as a main power source of the new energy automobile and becomes one of core components of the electric automobile.

In the prior art, the positive and negative lugs of the bare cell are welded on one surface of the connecting sheet close to the bare cell, one end of the connecting sheet is electrically connected with the pole assembly, and the other end of the connecting sheet is in a suspended state, so that the risk that the lugs are welded and the connecting sheet at one suspended end is collapsed is caused, and the safety of the battery is possibly influenced.

Therefore, how to provide a battery top cover, which can improve the safety of the battery pack and the structural stability of the battery pack is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present utility model is to improve the safety of a battery pack and to improve the structural stability of the battery pack. The utility model provides a battery top cover, comprising: the positive pole assembly, the negative pole assembly, the top cover plate, the plastic under the positive pole, the plastic under the negative pole, the positive pole connecting piece and the negative pole connecting piece; the positive pole post component penetrates through the top cover plate and the plastic under the positive pole and is connected with the positive pole connecting sheet; the negative pole column component penetrates through the top cover plate and the negative pole lower plastic and is connected with the negative pole connecting sheet; the anode lower plastic and the cathode lower plastic are oppositely arranged at two ends of the top cover sheet; one end of the positive electrode connecting sheet is welded with the positive electrode post component by laser, and the other end of the positive electrode connecting sheet is connected with the lower positive electrode by plastic; one end of the negative electrode connecting sheet is welded with the negative electrode column assembly by laser, and the other end of the negative electrode connecting sheet is connected with the negative electrode lower plastic; the middle part of positive connection piece is provided with positive arch structure, the middle part of negative connection piece is provided with negative arch structure.

According to a first embodiment of the present utility model, there is provided a battery top cover:

a battery top cover comprising: the positive pole assembly, the negative pole assembly, the top cover plate, the plastic under the positive pole, the plastic under the negative pole, the positive pole connecting piece and the negative pole connecting piece; the positive pole post component penetrates through the top cover plate and the plastic under the positive pole and is connected with the positive pole connecting sheet; the negative pole column component penetrates through the top cover plate and the negative pole lower plastic and is connected with the negative pole connecting sheet; the anode lower plastic and the cathode lower plastic are oppositely arranged at two ends of the top cover sheet; one end of the positive electrode connecting sheet is connected with the positive electrode post assembly, and the other end of the positive electrode connecting sheet is connected with the lower positive electrode through plastic cement; one end of the negative electrode connecting sheet is connected with the negative electrode column assembly, and the other end of the negative electrode connecting sheet is connected with the negative electrode lower plastic rubber; the middle part of positive connection piece is provided with positive arch structure, the middle part of negative connection piece is provided with negative arch structure.

Further, as a more preferred embodiment of the present utility model, further comprising: an explosion-proof valve assembly; the explosion proof valve assembly is disposed on the vent hole of the top cover sheet.

Further, as a more preferable embodiment of the present utility model, the positive electrode connecting sheet includes: a positive electrode support part, a positive electrode lug connection part and a positive electrode installation part; the positive electrode supporting part, the positive electrode lug connecting part and the positive electrode mounting part are sequentially connected; the positive electrode supporting part is provided with a positive electrode through hole, and the positive electrode through hole is connected with the lower plastic of the positive electrode through a buckle structure; the positive pole installation department is provided with the positive pole boss, the positive pole boss be provided with the positive pole post subassembly is connected first through-hole structure.

Further, as a more preferable embodiment of the present utility model, the positive electrode connecting sheet further includes: a positive electrode bending part; the positive electrode bending parts are arranged at two ends of the positive electrode lug connecting part; one end of the positive electrode tab connecting part is connected with the positive electrode supporting part through the positive electrode bending part; the other end of the positive electrode tab connecting part is connected with a positive electrode mounting part through the positive electrode bending part; the positive electrode lug connection part and the top cover sheet form a positive electrode arch structure.

Further, as a more preferable embodiment of the present utility model, the positive electrode connecting sheet further includes: a U-shaped groove arranged at one end of the positive electrode lug connection part; and the protection patch is arranged on the U-shaped groove.

Further, as a more preferable embodiment of the present utility model, the negative electrode connecting sheet includes: a negative electrode support part, a negative electrode tab connection part, and a negative electrode mounting part; the negative electrode supporting part, the negative electrode tab connecting part and the negative electrode mounting part are sequentially connected; the negative electrode supporting part is provided with a negative electrode through hole, and the negative electrode through hole is connected with the negative electrode lower plastic through a buckle structure; the negative pole installation department is provided with the negative pole boss, the negative pole boss be provided with the second through-hole structure that the negative pole post subassembly is connected.

Further, as a more preferable embodiment of the present utility model, the negative electrode connecting sheet further includes: a negative electrode bending portion; the negative electrode bending parts are arranged at two ends of the negative electrode lug connecting part; one end of the negative electrode tab connecting part is connected with the negative electrode supporting part through the negative electrode bending part; the other end of the negative electrode tab connecting part is connected with a negative electrode mounting part through the negative electrode bending part; the negative electrode tab connecting portion and the top cover sheet form a negative electrode arch structure.

Further, as a more preferable embodiment of the utility model, the plastic under the positive electrode is provided with a liquid injection port; the outside of annotating the liquid mouth is provided with the positive pole couple, the plastic under the positive pole pass through the positive pole couple with the positive pole connection piece is connected.

Further, as a more preferable embodiment of the utility model, a negative electrode hook is arranged on the negative electrode lower plastic, and the negative electrode lower plastic is connected with the negative electrode connecting sheet through the negative electrode hook.

According to a second embodiment of the present utility model, there is provided a battery pack:

a battery pack, comprising: the battery top cover and the bare cell;

the positive electrode lug of the bare cell is arranged in the positive electrode arch structure in a penetrating way;

and the negative electrode lug of the bare cell is arranged in the negative electrode arch structure in a penetrating way.

Compared with the prior art, in the technical scheme that this application provided, plastic under the positive pole and the negative pole all set up in the below of top cap piece, and plastic under the positive pole and the negative pole wholly cover the bottom of top cap piece after the plastic combination under the negative pole. The positive pole column component and the negative pole column component are both connected to the top cover plate, the bottom of the positive pole column component is welded on the whole formed by the top cover plate and the plastic under the positive pole, and the bottom of the negative pole column component is welded on the whole formed by the top cover plate and the plastic under the negative pole; the positive pole component and the negative pole component are respectively arranged at two ends of the top cover sheet. One end of the positive electrode connecting sheet is connected to the bottom of the positive electrode post assembly, the other end of the positive electrode connecting sheet is connected to the positive electrode lower plastic body, and the middle part of the positive electrode connecting sheet protrudes to one side far away from the top cover sheet to form a positive electrode arch structure; one end of the negative electrode connecting sheet is connected to the bottom of the negative electrode column assembly, the other end of the negative electrode connecting sheet is connected to the negative electrode lower plastic body, and the middle part of the negative electrode connecting sheet protrudes to one side far away from the top cover sheet to form a negative electrode arch structure; the positive electrode arch structure is used for penetrating the positive electrode lug of the bare cell, and the negative electrode arch structure is used for penetrating the negative electrode lug of the bare cell, so that burrs generated during installation and fixation of the positive electrode lug and the negative electrode lug can be prevented from affecting the body of the bare cell under the action of the positive electrode connecting sheet, the plastic under the positive electrode, the negative electrode connecting sheet and the plastic under the negative electrode; reducing the risk present during battery installation. According to the technical scheme, the safety of the battery pack can be improved, and the structural stability of the battery pack is improved.

Further compared with the prior art, the lug of the bare cell is welded on one surface of the connecting sheet close to the top cover plate, so that burrs generated in the welding process of the lug and the connecting sheet are opposite to the bare cell, the probability that the burrs fall into the bare cell and the burrs pierce through a diaphragm can be effectively reduced, and the safety of the single battery is improved.

Compared with the prior art, the connecting piece is provided with the supporting part, the supporting part and the liquid injection port of the lower plastic are mutually matched and installed, so that the structural strength of the connecting piece is increased, the connecting piece is not easy to be pulled and deformed after being welded with the tab, and the damage of the deformation of the connecting piece to the bare cell is avoided.

Drawings

Fig. 1 is a schematic exploded view of a battery top cover according to an embodiment of the present utility model;

FIG. 2 is a bottom view of a battery top cover in an embodiment of the utility model;

FIG. 3 is a schematic diagram of a battery top cover and bare cell mounting connection in an embodiment of the utility model;

FIG. 4 is a top view of a positive tab in accordance with an embodiment of the utility model;

FIG. 5 is an isometric view of a positive tab construction in an example embodiment of the utility model;

FIG. 6 is a structural isometric view of a negative tab in an example embodiment of the utility model;

FIG. 7 is a schematic diagram showing a combination of the plastic under the positive electrode and the plastic under the negative electrode according to an embodiment of the utility model;

FIG. 8 is a schematic view of a structure of a liquid injection port according to an embodiment of the present utility model;

fig. 9 is an embodiment of the present utility model.

Reference numerals:

a positive electrode post assembly 1; a negative electrode column assembly 2; an explosion-proof valve assembly 3; a top cover sheet 4; an exhaust hole 401; a plastic 5 under the positive electrode; a negative electrode lower plastic 6; a positive electrode connection sheet 7; positive electrode arch structure 701; a negative electrode connection piece 8; a negative pole arching structure 801; a bare cell 9; a positive electrode tab 10; a negative electrode tab 11; a positive electrode support 12; a positive electrode tab connection part 13; a positive electrode mounting portion 14; a positive electrode boss 15; a first via structure 1501; a U-shaped groove 16; a positive electrode through hole 17; a positive electrode bending portion 18; a negative electrode support 19; a negative electrode tab connection part 20; a negative electrode mounting portion 21; a negative electrode boss 22; a second via structure 2201; a negative electrode bending portion 23; a negative electrode through hole 24; a liquid injection port 25; a negative electrode hook 26; a positive electrode hook 27; the patch 28 is protected.

Detailed Description

In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" is two or more, unless explicitly defined otherwise.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the scope of the present disclosure, since any structural modifications, proportional changes, or dimensional adjustments made by those skilled in the art should not be made in the present disclosure without affecting the efficacy or achievement of the present disclosure.

According to a first embodiment of the present utility model, there is provided a battery top cover:

a battery top cover comprising: the positive pole component 1, the negative pole component 2, the top cover piece 4, the plastic 5 under the positive pole, the plastic 6 under the negative pole, the positive pole connecting piece 7 and the negative pole connecting piece 8; the positive pole component 1 is arranged on the top cover sheet 4 in a penetrating way, is connected with the positive pole connecting sheet 7 and is arranged on the lower plastic 5 of the positive pole; the negative pole column component 2 is arranged in the top cover sheet 4 in a penetrating way, the negative pole lower plastic 6 and connected with the negative pole connecting sheet 8; the anode lower plastic 5 and the cathode lower plastic 6 are oppositely arranged at two ends of the top cover sheet 4; one end of the positive electrode connecting sheet 7 is welded with the positive electrode column assembly 1 by laser, and the other end of the positive electrode connecting sheet 7 is connected with the plastic 5 under the positive electrode; one end of the negative electrode connecting sheet 8 is welded with the negative electrode column assembly 2 by laser, and the other end of the negative electrode connecting sheet 8 is connected with the negative electrode lower plastic 6; the middle part of positive connection piece 7 is provided with positive arch structure 701, the middle part of negative connection piece 8 is provided with negative arch structure 801.

The application provides a technical scheme of battery top cap, in this technical scheme, plastic under the positive pole and the negative pole all set up the below of top cap piece, and the plastic under the positive pole and the negative pole wholly cover the bottom of top cap piece after the plastic is combined. The positive pole column component and the negative pole column component are both connected to the top cover plate, the bottom of the positive pole column component is welded on the whole formed by the top cover plate and the plastic under the positive pole, and the bottom of the negative pole column component is welded on the whole formed by the top cover plate and the plastic under the negative pole; the positive pole component and the negative pole component are respectively arranged at two ends of the top cover sheet. One end of the positive electrode connecting sheet is connected to the bottom of the positive electrode post assembly, the other end of the positive electrode connecting sheet is connected to the positive electrode lower plastic body, and the middle part of the positive electrode connecting sheet protrudes to one side far away from the top cover sheet to form a positive electrode arch structure; one end of the negative electrode connecting sheet is connected to the bottom of the negative electrode column assembly, the other end of the negative electrode connecting sheet is connected to the negative electrode lower plastic body, and the middle part of the negative electrode connecting sheet protrudes to one side far away from the top cover sheet to form a negative electrode arch structure; the positive electrode arch structure is used for penetrating the positive electrode lug of the bare cell, and the negative electrode arch structure is used for penetrating the negative electrode lug of the bare cell, so that burrs generated during installation and fixation of the positive electrode lug and the negative electrode lug can be prevented from affecting the body of the bare cell under the action of the positive electrode connecting sheet, the plastic under the positive electrode, the negative electrode connecting sheet and the plastic under the negative electrode; reducing the risk present during battery installation. According to the technical scheme, the safety of the battery pack can be improved, and the structural stability of the battery pack is improved.

It should be noted that, in the prior art, the connection position between the electrode tab and the connection piece of the bare cell is located between the connection piece and the bare cell, so that burrs or protrusions generated in the process of welding and installing the tab will affect the safety of the bare cell, and if the burrs or protrusions are embedded into the bare cell, the internal short circuit of the bare cell will be caused, and the burning damage of the battery cell is caused.

It should be further noted that, in the prior art, in order to accelerate the assembly speed of the bare cell and the battery top cover, the tab of the bare cell is usually directly lapped on the electrode connecting sheet, and the tab is located between the connecting sheet and the bare cell, so as to jeopardize the use safety of the battery. The prior art neglects the above problems in order to accelerate the assembly speed of the battery.

It is further to explain that, in the technical scheme of this application, the both ends of connection piece all are connected with electrode post subassembly and electrode lower plastic on the battery top cap, have ensured the stability of connection piece, prevent because the perk scheduling problem embedding of connection piece in the naked electric core, harm naked electric core's safety in utilization.

Specifically, in the embodiment of the present utility model, the method further includes: an explosion-proof valve assembly 3; the explosion-proof valve assembly 3 is disposed on the vent 401 of the top cap sheet 4.

It should be noted that, can effectively control and release the high-pressure gas that produces after the electric core damages through explosion-proof valve subassembly, prevent the battery burst to a certain extent.

Specifically describing, in the embodiment of the present utility model, the positive electrode connection piece 7 includes: a positive electrode support portion 12, a positive electrode tab connection portion 13, and a positive electrode mounting portion 14; the positive electrode support 12, the positive electrode tab connection 13, and the positive electrode mounting 14 are connected in order; the positive electrode supporting part 12 is provided with a positive electrode through hole 17, and the positive electrode through hole 17 is connected with the plastic 5 under the positive electrode through a buckle structure; the positive electrode mounting portion 14 is provided with a positive electrode boss 15, and the positive electrode boss 15 is provided with a first through hole structure 1501 connected with the positive electrode column assembly 1.

In the positive electrode connecting piece, the connecting piece can be stably connected to the top cover plate through the positive electrode supporting part and the positive electrode mounting part, so that the tilting of the connecting piece is prevented, and the production/use safety is influenced. Through the positive pole boss, can effectively improve the connection stability of positive pole connection piece and positive pole post subassembly.

Specifically describing, in the embodiment of the present utility model, the positive electrode connection piece 7 further includes: a positive electrode bending portion 18; the positive electrode bending parts 18 are arranged at two ends of the positive electrode lug connection part 13; one end of the positive electrode tab connection part 13 is connected with the positive electrode support part 12 through the positive electrode bending part 18; the other end of the positive electrode tab connecting part 13 is connected with the positive electrode mounting part 14 through the positive electrode bending part 18; the positive electrode tab connection portion 13 and the top cover sheet 4 form a positive electrode arch structure 701.

The positive electrode bending part can form a stable positive electrode arch structure on the connecting sheet, so that the quality of positive electrode lug installation is improved, and the efficiency of positive electrode lug installation is improved.

Specifically describing, in the embodiment of the present utility model, the positive electrode connection piece 7 further includes: a U-shaped groove 16 arranged at one end of the positive electrode tab connecting part 13; and a protective patch 28 disposed on the U-shaped slot 16.

It should be noted that, install the protection paster through the U type groove, improve the installation stability of protection paster.

Specifically describing, in the embodiment of the present utility model, the negative electrode connection piece 8 includes: a negative electrode support portion 19, a negative electrode tab connection portion 20, and a negative electrode mounting portion 21; the negative electrode support portion 19, the negative electrode tab connection portion 20, and the negative electrode mounting portion 21 are connected in order; the negative electrode supporting part 19 is provided with a negative electrode through hole 24, and the negative electrode through hole 24 is connected with the negative electrode lower plastic 6 through a buckle structure; the negative electrode mounting portion 21 is provided with a negative electrode boss 22, and the negative electrode boss 22 is provided with a second through hole structure 2201 connected with the negative electrode column assembly 2.

In the negative electrode connecting piece, the connecting piece can be stably connected to the top cover piece through the negative electrode supporting part and the negative electrode mounting part, so that the tilting of the connecting piece is prevented, and the production/use safety is influenced. Through the negative pole boss, can effectively improve the connection stability of negative pole connection piece and negative pole post subassembly.

Specifically describing, in the embodiment of the present utility model, the negative electrode connection piece 8 further includes: a negative electrode bending portion 23; the negative electrode bending parts 23 are arranged at two ends of the negative electrode tab connecting part 20; one end of the negative electrode tab connection part 20 is connected with the negative electrode support part 19 through the negative electrode bending part 23; the other end of the negative electrode tab connection part 20 is connected with a negative electrode mounting part 21 through the negative electrode bending part 23; the negative electrode tab connection portion 20 and the top cover sheet 4 form a negative electrode arch structure 801.

The negative electrode bending part can form a stable negative electrode arch structure on the connecting sheet, so that the quality of the installation of the negative electrode tab is improved, and the efficiency of the installation of the negative electrode tab is improved.

Specifically describing, in the embodiment of the present utility model, the plastic 5 under the positive electrode is provided with a liquid injection port 25; the outside of annotating liquid mouth 25 is provided with anodal couple 27, plastic 5 under the positive pole pass through anodal couple 27 with anodal connection piece 7 is connected.

The positive electrode hook is used for connecting the positive electrode connecting sheet and the plastic under the positive electrode, so that the installation efficiency of the positive electrode connecting sheet is improved.

Specifically describing, in the embodiment of the present utility model, the negative electrode lower plastic 6 is provided with a negative electrode hook 26, and the negative electrode lower plastic 6 is connected with the negative electrode connecting piece 8 through the negative electrode hook 26.

The negative electrode hook is used for connecting the negative electrode connecting sheet and the negative electrode lower plastic, so that the installation efficiency of the negative electrode connecting sheet is improved.

According to a second embodiment of the present utility model, there is provided a battery pack:

a battery pack, comprising: the battery top cover and the bare cell 9;

the positive electrode lug 10 of the bare cell 9 is arranged in the positive electrode arch structure 701 in a penetrating way;

the negative electrode tab 11 of the bare cell 9 is inserted into the negative electrode arch structure 801.

The application also provides a technical scheme of group battery, the group battery that obtains by this technical scheme because anodal utmost point ear and negative pole utmost point ear and connection piece have obtained appropriate fixed and installation, will have safer result of use, get rid of naked electric core and be stamped the risk of wearing by connection piece or utmost point ear, improves the group battery security.

According to a third embodiment of the present utility model, there is provided a method of manufacturing a battery pack:

a method of making a battery pack, the method comprising: making a top cover sheet 4: sequentially arranging a first positive electrode mounting hole, an exhaust hole, a first negative electrode mounting hole and a first liquid injection connecting hole on a top cover substrate in a punching mode to obtain a top cover sheet 4; manufacturing plastic 5 under the anode and plastic 6 under the cathode: manufacturing the plastic 5 under the anode and the plastic 6 under the cathode in a 3D printing or die casting mode; manufacturing an anode connecting sheet 7: firstly, obtaining a positive outline substrate of a positive connecting sheet 7 in a stamping mode; then, stamping a positive electrode bending part 18 on the positive electrode outline substrate in a stamping mode, so that the positive electrode outline substrate forms a three-section structure of the positive electrode supporting part 12, the positive electrode lug connecting part 13 and the positive electrode mounting part 14; finally, punching the positive electrode tab connecting part 13 by a punching mode to obtain a U-shaped groove 16; manufacturing a negative electrode connecting sheet 8: firstly, obtaining a negative outline substrate of a negative connecting sheet 8 in a stamping mode; then stamping the negative electrode on the negative electrode outline substrate by a stamping modeA bending portion 23 for forming a three-stage structure of the negative electrode support portion 19, the negative electrode tab connection portion 20, and the negative electrode mounting portion 21 on a negative electrode outline base material; the prefabricated positive pole component 1 is arranged on the top cover sheet 4 in a laser welding mode and is connected with the plastic 5 under the positive pole; the prefabricated negative pole column component 2 is arranged on the top cover sheet 4 in a laser welding mode and is connected with the negative pole lower plastic 6; the positive electrode mounting part 14 of the positive electrode connecting sheet 7 is connected and mounted at the bottom of the positive electrode column assembly 1 through an annular clamping structure, meanwhile, the positive electrode supporting part 12 is in clamping connection with the plastic 5 under the positive electrode through a positive electrode hook 27, and the liquid injection port 25 is communicated with the first liquid injection connecting hole; the negative electrode mounting part 21 of the negative electrode connecting sheet 8 is connected and mounted at the bottom of the negative electrode column assembly 2 through an annular buckle structure；Simultaneously, the negative electrode supporting part 19 is in buckling connection with the negative electrode lower plastic 6 through a negative electrode hook 26; the positive electrode lug 10 of the bare cell 9 is penetrated and welded in the positive electrode arch structure 701; and the negative electrode tab 11 of the bare cell 9 is penetrated and welded in the negative electrode arch structure 801.

The application also provides a technical scheme of group battery manufacturing method, this technical scheme is used for the battery top cap of this application and bare cell's connection specially, can improve battery top cap and bare cell's stability and installation rate of installation.

Example 1

A battery top cover comprising: the positive pole component 1, the negative pole component 2, the top cover piece 4, the plastic 5 under the positive pole, the plastic 6 under the negative pole, the positive pole connecting piece 7 and the negative pole connecting piece 8; the positive pole component 1 is arranged on the top cover sheet 4 in a penetrating way, is connected with the positive pole connecting sheet 7 and is arranged on the lower plastic 5 of the positive pole; the negative pole column component 2 is arranged in the top cover sheet 4 in a penetrating way, the negative pole lower plastic 6 and connected with the negative pole connecting sheet 8; the anode lower plastic 5 and the cathode lower plastic 6 are oppositely arranged at two ends of the top cover sheet 4; one end of the positive electrode connecting sheet 7 is welded with the positive electrode column assembly 1 by laser, and the other end of the positive electrode connecting sheet 7 is connected with the plastic 5 under the positive electrode; one end of the negative electrode connecting sheet 8 is welded with the negative electrode column assembly 2 by laser, and the other end of the negative electrode connecting sheet 8 is connected with the negative electrode lower plastic 6; the middle part of positive connection piece 7 is provided with positive arch structure 701, the middle part of negative connection piece 8 is provided with negative arch structure 801.

Example 2

Example 1 was repeated except that it further included: an explosion-proof valve assembly 3; the explosion-proof valve assembly 3 is disposed on the vent 401 of the top cap sheet 4.

Example 3

Example 1 was repeated except that the positive electrode tab 7 included: a positive electrode support portion 12, a positive electrode tab connection portion 13, and a positive electrode mounting portion 14; the positive electrode support 12, the positive electrode tab connection 13, and the positive electrode mounting 14 are connected in order; the positive electrode supporting part 12 is provided with a positive electrode through hole 17, and the positive electrode through hole 17 is connected with the plastic 5 under the positive electrode through a buckle structure; the positive electrode mounting portion 14 is provided with a positive electrode boss 15, and the positive electrode boss 15 is provided with a first through hole structure 1501 connected with the positive electrode column assembly 1.

Example 4

Example 3 is repeated except that the positive electrode tab 7 further includes: a positive electrode bending portion 18; the positive electrode bending parts 18 are arranged at two ends of the positive electrode lug connection part 13; one end of the positive electrode tab connection part 13 is connected with the positive electrode support part 12 through the positive electrode bending part 18; the other end of the positive electrode tab connecting part 13 is connected with the positive electrode mounting part 14 through the positive electrode bending part 18; the positive electrode tab connection portion 13 and the top cover sheet 4 form a positive electrode arch structure 701.

Example 5

Example 4 was repeated except that the positive electrode tab 7 further includes: a U-shaped groove 16 arranged at one end of the positive electrode tab connecting part 13; and a protective patch 28 disposed on the U-shaped slot 16.

Example 6

Example 1 was repeated except that the negative electrode connection piece 8 includes: a negative electrode support portion 19, a negative electrode tab connection portion 20, and a negative electrode mounting portion 21; the negative electrode support portion 19, the negative electrode tab connection portion 20, and the negative electrode mounting portion 21 are connected in order; the negative electrode supporting part 19 is provided with a negative electrode through hole 24, and the negative electrode through hole 24 is connected with the negative electrode lower plastic 6 through a buckle structure; the negative electrode mounting portion 21 is provided with a negative electrode boss 22, and the negative electrode boss 22 is provided with a second through hole structure 2201 connected with the negative electrode column assembly 2.

Example 7

Example 6 was repeated except that the negative electrode tab 8 further comprises: a negative electrode bending portion 23; the negative electrode bending parts 23 are arranged at two ends of the negative electrode tab connecting part 20; one end of the negative electrode tab connection part 20 is connected with the negative electrode support part 19 through the negative electrode bending part 23; the other end of the negative electrode tab connection part 20 is connected with a negative electrode mounting part 21 through the negative electrode bending part 23; the negative electrode tab connection portion 20 and the top cover sheet 4 form a negative electrode arch structure 801.

Example 8

Example 1 was repeated except that the lower positive electrode plastic 5 was provided with a liquid injection port 25; the outside of annotating liquid mouth 25 is provided with anodal couple 27, plastic 5 under the positive pole pass through anodal couple 27 with anodal connection piece 7 is connected.

Example 9

Example 1 was repeated except that the negative electrode lower plastic 6 was provided with a negative electrode hook 26, and the negative electrode lower plastic 6 was connected with the negative electrode connecting piece 8 through the negative electrode hook 26.

Example 10

A battery pack, comprising: the battery top cover and the bare cell 9;

the positive electrode lug 10 of the bare cell 9 is arranged in the positive electrode arch structure 701 in a penetrating way;

the negative electrode tab 11 of the bare cell 9 is inserted into the negative electrode arch structure 801.

Example 11

A method of making a battery pack, the method comprising: making a top cover sheet 4: sequentially arranging a first positive electrode mounting hole, an exhaust hole, a first negative electrode mounting hole and a first liquid injection connecting hole on a top cover substrate in a punching mode to obtain a top cover sheet 4; manufacturing plastic 5 under the anode and plastic 6 under the cathode: square cast by 3D printing or die castingManufacturing to obtain anode lower plastic 5 and cathode lower plastic 6; manufacturing an anode connecting sheet 7: firstly, obtaining a positive outline substrate of a positive connecting sheet 7 in a stamping mode; then, stamping a positive electrode bending part 18 on the positive electrode outline substrate in a stamping mode, so that the positive electrode outline substrate forms a three-section structure of the positive electrode supporting part 12, the positive electrode lug connecting part 13 and the positive electrode mounting part 14; finally, punching the positive electrode tab connecting part 13 by a punching mode to obtain a U-shaped groove 16; manufacturing a negative electrode connecting sheet 8: firstly, obtaining a negative outline substrate of a negative connecting sheet 8 in a stamping mode; then, stamping a negative electrode bending part 23 on the negative electrode outline substrate in a stamping mode, so that the negative electrode outline substrate forms a three-section structure of the negative electrode supporting part 19, the negative electrode tab connecting part 20 and the negative electrode mounting part 21; the prefabricated positive pole component 1 is arranged on the top cover sheet 4 in a laser welding mode and is connected with the plastic 5 under the positive pole; the prefabricated negative pole column component 2 is arranged on the top cover sheet 4 in a laser welding mode and is connected with the negative pole lower plastic 6; the positive electrode mounting part 14 of the positive electrode connecting sheet 7 is connected and mounted at the bottom of the positive electrode column assembly 1 through an annular clamping structure, meanwhile, the positive electrode supporting part 12 is in clamping connection with the plastic 5 under the positive electrode through a positive electrode hook 27, and the liquid injection port 25 is communicated with the first liquid injection connecting hole; the negative electrode mounting part 21 of the negative electrode connecting sheet 8 is connected and mounted at the bottom of the negative electrode column assembly 2 through an annular buckle structure；Simultaneously, the negative electrode supporting part 19 is in buckling connection with the negative electrode lower plastic 6 through a negative electrode hook 26; the positive electrode lug 10 of the bare cell 9 is penetrated and welded in the positive electrode arch structure 701; and the negative electrode tab 11 of the bare cell 9 is penetrated and welded in the negative electrode arch structure 801.

What needs to be stated is:

referring to FIG. 1, a schematic diagram of a power battery top cover, a connecting sheet and a battery according to the present utility model is shown, wherein a 1-positive pole component passes through a positive pole through hole of a 4-top cover sheet and a through hole of a 5-positive lower plastic respectively, and the 1-positive pole component, the 5-positive lower plastic and the 4-top cover sheet are welded together by laser; the 2-negative pole column component passes through the negative pole through hole of the 4-top cover piece and the through hole of the 6-negative pole lower plastic respectively, and the 2-negative pole column component, the 6-negative pole lower plastic and the 4-top cover piece are welded together through laser; the 3-explosion-proof valve assembly is fixed on the upper and lower surfaces of the vent hole of the 4-top cover plate; the 14-positive electrode mounting part of the 7-positive electrode connecting sheet is electrically connected with the lower end of the 1-positive electrode column component, and the 12-positive electrode supporting part of the 7-positive electrode connecting sheet is fixed with the injection component of the plastic under the 5-positive electrode; the 21-negative electrode mounting part of the 8-negative electrode connecting sheet is electrically connected with the lower end of the 2-negative electrode column assembly, and the 19-negative electrode supporting part of the 8-negative electrode connecting sheet is fixed with the 6-negative electrode lower plastic.

Fig. 2 is a bottom view of a power battery top cover, a connecting piece and a battery according to the present utility model.

As shown in FIG. 3, the power battery top cover, the connecting sheet and the battery are structurally schematic, wherein the 9-bare cell is divided into a left block and a right block, the upper end of the 9-bare cell is provided with a 10-positive electrode tab and a 11-negative electrode tab, the 10-positive electrode tab is arranged on one side of the 7-positive electrode connecting sheet close to the 4-top cover sheet and is fixed together through electric connection, and the 11-negative electrode tab is arranged on one side of the 8-negative electrode connecting sheet close to the 4-top cover sheet and is fixed together through electric connection.

As shown in fig. 4 and 5, the top view and the axial view of the power battery top cover, the connecting piece and the 7-positive connecting piece of the battery are respectively provided, the 7-positive connecting piece consists of a 14-positive mounting part, a 13-positive lug connecting part and a 12-positive supporting part, a downward 15-positive boss is arranged in the middle of the 14-positive mounting part, a through hole is arranged in the middle of the 15-positive boss, the 15-positive boss is matched with the lower surface of the 1-positive column assembly, a 16-U-shaped groove is formed in one side, close to the 13-positive lug connecting part, of the 14-positive mounting part, the 16-U-shaped groove can be rectangular and circular, or the upper surface of the 16-U-shaped groove is provided with a 28-protection patch according to the actual situation of the battery, and the 28-protection patch is made of PET. The 14-positive electrode mounting part is electrically connected with the lower surface of the 1-positive electrode column assembly; the middle part of the 12-positive electrode supporting part is provided with a 17-positive electrode through hole, and the 17-positive electrode through hole penetrates through a 27-27-positive electrode hook of a 25-liquid injection port of the plastic under the 5-positive electrode and is fixedly connected through a buckle; the connecting part of the 13-positive electrode lug is a left part and a right part and is integrally U-shaped; an 18-positive electrode bending part is arranged between the 12-positive electrode supporting part and the 13-positive electrode lug connecting part, an 18-positive electrode bending part is arranged between the 13-positive electrode lug connecting part and the 14-positive electrode mounting part, and the upper surface of the 13-positive electrode lug connecting part is higher than the upper surfaces of the 14-positive electrode mounting part and the 12-positive electrode supporting part.

As shown in fig. 6, the structure of the top cover, the connecting piece and the 8-negative electrode connecting piece of the battery of the utility model is schematically shown, the 8-negative electrode connecting piece is composed of a 21-negative electrode mounting part, a 20-negative electrode tab connecting part and a 19-negative electrode supporting part, a downward 22-negative electrode boss is arranged in the middle of the 21-negative electrode mounting part, a through hole is arranged in the middle of the 22-negative electrode boss, the 22-negative electrode boss is matched with the lower surface of the 2-negative electrode column assembly, and the 21-negative electrode mounting part is electrically connected with the lower surface of the 2-negative electrode column assembly; the middle part of the 19-negative electrode supporting part is provided with a 24-negative electrode through hole, and the 24-negative electrode through hole passes through a 26-negative electrode hook matched with the 6-negative electrode lower plastic and is fixedly connected through a buckle; the connecting part of the 20-negative electrode lug is a left part and a right part, and the whole is U-shaped; a23-negative electrode bending part is arranged between the 19-negative electrode support part and the 20-negative electrode lug connecting part, a 23-negative electrode bending part is arranged between the 20-negative electrode lug connecting part and the 21-negative electrode mounting part, and the upper surface of the 20-negative electrode lug connecting part is higher than the upper surface of the 21-negative electrode mounting part and the upper surface of the 19-negative electrode support part.

Referring to fig. 7 and 8, the top cover, the connecting sheet and the 5-positive electrode lower plastic and the 6-negative electrode lower plastic of the power battery are schematic diagrams, a 25-liquid injection port is arranged on the 5-positive electrode lower plastic, a circle of 27-positive electrode hooks are arranged around the 25-liquid injection port, and the 27-positive electrode hooks can be a complete circle or a circle formed by a plurality of circles; a circle of 26-negative pole hooks are arranged at the position where the 6-negative pole lower plastic is matched with the 8-negative pole connecting piece, and the 26-negative pole hooks can be a complete circle or a circle formed by a plurality of circles.

As shown in fig. 9, the other structure forms of the 7-positive electrode connecting sheet are that the 14-positive electrode mounting part and the 12-positive electrode supporting part are integrally formed without partition in the middle, and the 13-positive electrode lug connecting parts are distributed on two sides of the 14-positive electrode mounting part and are respectively connected through 18-positive electrode bending parts.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. Battery top cap, its characterized in that includes: the positive pole column assembly (1), the negative pole column assembly (2), the top cover sheet (4), the plastic (5) under the positive pole, the plastic (6) under the negative pole, the positive pole connecting sheet (7) and the negative pole connecting sheet (8);

the positive pole column component (1) is arranged through the top cover plate (4) and the plastic (5) under the positive pole in a penetrating way and is connected with the positive pole connecting sheet (7);

the negative pole column component (2) is arranged on the top cover plate (4) in a penetrating way, is connected with the negative pole lower plastic (6) and is connected with the negative pole connecting piece (8);

the anode lower plastic (5) and the cathode lower plastic (6) are oppositely arranged at two ends of the top cover sheet (4);

one end of the positive electrode connecting sheet (7) is welded with the positive electrode column assembly (1) by laser, and the other end of the positive electrode connecting sheet (7) is connected with the plastic (5) under the positive electrode;

one end of the negative electrode connecting sheet (8) is welded with the negative electrode column assembly (2) by laser, and the other end of the negative electrode connecting sheet (8) is connected with the negative electrode lower plastic (6);

the middle part of anodal connection piece (7) is provided with anodal arch structure (701), the middle part of negative pole connection piece (8) is provided with negative pole arch structure (801).

2. The battery top cover of claim 1, further comprising: an explosion-proof valve assembly (3);

the explosion-proof valve assembly (3) is arranged on the vent hole (401) of the top cover sheet (4).

3. The battery top cover according to claim 1, wherein the positive electrode tab (7) comprises:

a positive electrode support part (12), a positive electrode tab connection part (13) and a positive electrode mounting part (14);

the positive electrode supporting part (12), the positive electrode lug connecting part (13) and the positive electrode mounting part (14) are sequentially connected;

the positive electrode supporting part (12) is provided with a positive electrode through hole (17), and the positive electrode through hole (17) is connected with the plastic (5) under the positive electrode through a buckling structure;

the positive pole installation part (14) is provided with a positive pole boss (15), and the positive pole boss (15) is provided with a first through hole structure (1501) connected with the positive pole column assembly (1).

4. A battery top cover according to claim 3, wherein the positive connection tab (7) further comprises: a positive electrode bending part (18);

the positive electrode bending parts (18) are arranged at two ends of the positive electrode lug connecting part (13);

one end of the positive electrode tab connecting part (13) is connected with the positive electrode supporting part (12) through the positive electrode bending part (18);

the other end of the positive electrode lug connecting part (13) is connected with a positive electrode mounting part (14) through the positive electrode bending part (18);

the positive electrode lug connection part (13) and the top cover sheet (4) form a positive electrode arch structure (701).

5. The battery top cover according to claim 4, wherein the positive electrode tab (7) further comprises: a U-shaped groove (16) arranged at one end of the positive electrode lug connection part (13);

and the protective patch (28) is arranged on the U-shaped groove (16).

6. Battery top cover according to claim 1, characterized in that the negative connection tab (8) comprises:

a negative electrode support part (19), a negative electrode tab connection part (20), and a negative electrode mounting part (21);

the negative electrode supporting part (19), the negative electrode tab connecting part (20) and the negative electrode mounting part (21) are sequentially connected;

the negative electrode supporting part (19) is provided with a negative electrode through hole (24), and the negative electrode through hole (24) is connected with the negative electrode lower plastic (6) through a buckle structure;

negative pole boss (22) is provided with on negative pole installation department (21), negative pole boss (22) be provided with negative pole post subassembly (2) are connected second through-hole structure (2201).

7. The battery top cover according to claim 6, wherein the negative connection tab (8) further comprises: a negative electrode bending part (23);

the negative electrode bending parts (23) are arranged at two ends of the negative electrode lug connection part (20);

one end of the negative electrode tab connecting part (20) is connected with the negative electrode supporting part (19) through the negative electrode bending part (23);

the other end of the negative electrode tab connecting part (20) is connected with a negative electrode mounting part (21) through the negative electrode bending part (23);

the negative electrode tab connecting part (20) and the top cover sheet (4) form a negative electrode arch structure (801).

8. The battery top cover according to any one of claims 1 to 7, wherein the under-anode plastic (5) is provided with a liquid injection port (25); the outer side of the liquid injection port (25) is provided with a positive pole hook (27), and the plastic (5) under the positive pole is connected with the positive pole connecting sheet (7) through the positive pole hook (27); and/or

The negative electrode lower plastic (6) is provided with a negative electrode hook (26), and the negative electrode lower plastic (6) is connected with the negative electrode connecting sheet (8) through the negative electrode hook (26).

9. A battery pack, comprising: the battery top cover, bare cell (9) of any of claims 1-8;

the positive electrode lug (10) of the bare cell (9) is arranged in the positive electrode arch structure (701) in a penetrating way;

the negative electrode lug (11) of the bare cell (9) is arranged in the negative electrode arch structure (801) in a penetrating mode.

Images