CN216903141U

CN216903141U - Battery cover plate assembly and battery

Info

Publication number: CN216903141U
Application number: CN202220052765.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Jusheng Technology Co Ltd
Current assignee: Shanghai Jusheng Technology Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-07-05
Anticipated expiration: 2032-01-10

Abstract

The embodiment of the utility model discloses a battery cover plate assembly and a battery, wherein the battery cover plate assembly comprises a cover plate body, an explosion-proof sheet, a bracket and a pole; the cover plate body is provided with an upper end face and a lower end face which are oppositely arranged, the cover plate body is provided with a pole mounting hole and an explosion-proof hole which penetrate through the upper end face and the lower end face, and the section size of the explosion-proof hole is gradually increased from the lower end face of the cover plate body to the upper end face; the explosion-proof sheet is arranged in the explosion-proof hole; the support is arranged on the lower end face of the cover plate body and provided with an avoidance hole and an explosion-proof cavity, the avoidance hole is communicated with the pole mounting hole, the explosion-proof cavity is arranged opposite to the explosion-proof sheet, the explosion-proof cavity is provided with a lower opening, and the explosion-proof cavity shrinks at the lower opening; the pole column penetrates through the pole column mounting hole and the avoiding hole. Therefore, the technical scheme of the embodiment of the utility model can effectively improve the explosion-proof performance, safety and sealing performance of the battery.

Description

Battery cover plate assembly and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly and a battery.

Background

With the decrease of traditional petrochemical energy and the increasing attention of people on environmental protection, the application range of the lithium battery as an environmentally-friendly clean energy is wider and wider. The battery cover plate is an important component of the battery. The performance of the battery cover plate plays an important role in ensuring the normal progress of chemical reactions inside the battery and the safety of the battery. The existing battery cover plate has insufficient explosion-proof performance, sealing performance and structural stability, and can not meet the requirement on the use safety of the battery.

SUMMERY OF THE UTILITY MODEL

An object of an embodiment of the present invention is to provide a battery cover plate assembly and a battery, which can solve at least some of the above-mentioned drawbacks in the prior art.

In a first aspect, an embodiment of the present invention provides a battery cover plate assembly, including a cover plate body, an explosion-proof sheet, a bracket, and a pole; the cover plate body is provided with an upper end face and a lower end face which are oppositely arranged, the cover plate body is provided with a pole mounting hole and an explosion-proof hole which penetrate through the upper end face and the lower end face, and the section size of the explosion-proof hole is gradually increased from the lower end face of the cover plate body to the upper end face; the explosion-proof sheet is arranged in the explosion-proof hole; the support is arranged on the lower end face of the cover plate body and provided with an avoidance hole and an explosion-proof cavity, the avoidance hole is communicated with the pole mounting hole, the explosion-proof cavity is arranged opposite to the explosion-proof sheet, the explosion-proof cavity is provided with a lower opening, and the explosion-proof cavity is contracted at the lower opening; the utmost point post is worn to locate utmost point post mounting hole with in the hole of dodging.

In some embodiments, the battery cover plate assembly further comprises a sealing element, the sealing element is provided with a first through hole for the pole to pass through, the sealing element is provided with a penetrating section and at least one sealing flange, the sealing flange is connected with the penetrating section, the penetrating section is arranged in the pole mounting hole in a penetrating manner, the outer contour size of the penetrating section is matched with the pole mounting hole, and the sealing flange abuts against the upper end face or the lower end face of the cover plate body.

In some embodiments, the sealing element includes at least one first sealing element, the first sealing element has two sealing flanges, the two sealing flanges are respectively a lower sealing flange and an upper sealing flange, the lower sealing flange and the upper sealing flange are respectively disposed at two ends of the penetrating section, the lower sealing flange abuts against the lower end face of the cover plate body, and the upper sealing flange abuts against the upper end face of the cover plate body.

In some embodiments, the sealing element comprises at least one second sealing element having a sealing flange, the sealing flange being a lower sealing flange connected to one end of the penetrating segment and abutting against the lower end surface of the cover plate body; the battery cover plate component further comprises a cushion block, the cushion block is provided with a second through hole for the pole to penetrate through, and the cushion block is arranged on the upper end face of the cover plate body.

In some embodiments, a fixing groove is formed in one side of the bracket opposite to the lower end face of the cover plate body, the fixing groove is communicated with the pole mounting hole and the avoiding hole, and the lower sealing flange is arranged in the fixing groove.

In some embodiments, the post comprises a post body having a first end and a second end opposite to each other, the first end of the post body penetrates through the upper end surface of the cover plate body, and the first end of the post body is provided with a wedge-shaped block; the battery cover plate component further comprises a conductive block, the conductive block is provided with a wedge-shaped hole corresponding to the wedge-shaped block, and the wedge-shaped hole is connected with the wedge-shaped block.

In some embodiments, the battery cover plate assembly further includes a positioning element, the positioning element is used for positioning the conductive block, the positioning element has a third through hole and a positioning groove, the third through hole is used for the pole main body to pass through, and the positioning groove is disposed on one side of the positioning element, which faces away from the cover plate body; the wedge-shaped block extends into the positioning groove, and the conductive block is positioned in the positioning groove.

In some embodiments, the cover plate body further has a liquid injection hole which gradually shrinks from the upper end surface to the lower end surface, and the liquid injection hole is arranged outside the explosion-proof hole and communicated with the explosion-proof cavity.

In some embodiments, the explosion-proof cavity further has an upper opening, and the upper opening is arranged opposite to the explosion-proof hole and the liquid injection hole; the battery cover plate assembly further comprises a drainage frame, the drainage frame is connected with the lower end face of the cover plate body and arranged at the upper opening, a drainage gap is formed between the drainage frame and the side wall of the upper opening, and the drainage gap is communicated with the liquid injection hole.

In some embodiments, the stent includes a stent body, a first leg and a second leg; the bracket body is provided with the avoidance hole and the explosion-proof cavity; the first supporting piece is arranged on the lateral side of the bracket body and is abutted against the lower end face of the cover plate body; the second supporting piece and the first supporting piece are arranged in parallel at intervals.

In some embodiments, the cover plate body is provided with two pole mounting holes arranged at intervals, and the two pole mounting holes are respectively a positive pole mounting hole and a negative pole mounting hole; the number of the polar columns is two, the two polar columns are respectively a positive pole column and a negative pole column, the positive pole column penetrates through the positive pole column mounting hole, and the negative pole column penetrates through the negative pole column mounting hole; the battery cover plate assembly further comprises two sealing elements, the two sealing elements are respectively a first sealing element and a second sealing element, the first sealing element is sleeved outside the negative pole, the second sealing element is sleeved outside the positive pole, and the sealing elements are provided with first through holes for the corresponding poles to pass through; the sealing element is provided with a penetrating section and a lower sealing flange, the penetrating section is arranged in the pole mounting hole in a penetrating mode, the sealing flange is arranged at the end portion of the penetrating section, and the lower sealing flange abuts against the lower end face of the cover plate body; the first sealing element is also provided with an upper sealing flange, the upper sealing flange is arranged at one end of the penetrating section, which is far away from the lower sealing flange, and the upper sealing flange abuts against the upper end surface of the cover plate body; the battery cover plate assembly is also provided with a cushion block, the cushion block is provided with a second through hole for the positive post to pass through, and the cushion block is arranged on the upper end face of the cover plate body; the battery cover plate assembly further comprises two conductive blocks and two positioning pieces, the two conductive blocks are respectively a positive conductive block and a negative conductive block, the two positioning pieces are respectively a positive positioning piece and a negative positioning piece, the negative positioning piece presses the upper sealing flange on the upper end face of the cover plate body, and the positive positioning piece presses the cushion block on the upper end face of the cover plate body; the cover plate body is also provided with two liquid injection holes, and the liquid injection holes are communicated with the explosion-proof cavity; the explosion-proof hole is arranged between the two pole mounting holes, one of the two liquid injection holes is arranged between the explosion-proof hole and the positive pole mounting hole, and the other one is arranged between the explosion-proof hole and the negative pole mounting hole.

In a second aspect, an embodiment of the present invention further provides a battery, including a casing, a cell body, and the battery cover plate assembly according to the first aspect; the battery cell body is accommodated in the shell; the battery cover plate component encapsulates the battery cell body in the shell.

The embodiment of the utility model provides a battery cover plate assembly and a battery. The cross sectional dimension through with the explosion-proof hole sets up to the up terminal surface crescent from the lower extreme of apron body to the explosion-proof performance of battery can be promoted in the explosion-proof chamber that has the lower open-ended of shrink in the support setting, thereby promotes the security of battery.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic top view of a battery cover plate assembly according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a battery cover plate assembly of an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a cover plate body according to an embodiment of the utility model;

FIG. 4 is a schematic structural view of a stent according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a pole of an embodiment of the present invention;

fig. 6 is a partial structural schematic view of a battery cover plate assembly according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a first seal of an embodiment of the present invention;

fig. 8 is a schematic structural view of a second seal member according to an embodiment of the present invention.

Description of reference numerals:

100-a cover plate body; 110-upper end face; 120-lower end face; 130P-positive pole mounting hole; 130N-cathode post mounting holes; 140-explosion-proof hole; 150-liquid injection hole;

200P-positive pole; 200N-negative pole; 210-pole body; 211-wedge block; 220-a limit table;

300-explosion-proof piece;

400-a support; 410-a stent body; 411-avoidance holes; 412-explosion proof chamber; 412 a-lower opening; 412 b-upper opening; 413-a fixed slot; 414-pole positioning groove; 420-a first support; 430-a second branch;

500A-first seal; 500B-a second seal; 510-a first perforation; 520-a penetrating segment; 530-lower sealing flange; 540-upper sealing flange;

600-cushion blocks; 610-a second perforation;

700P-positive conductive block; 700N-negative conductive block; 710-a wedge-shaped aperture;

800P-positive electrode positioning piece; 800N-negative pole locating piece; 810-third perforation; 820-positioning grooves for conductive blocks;

900-drainage frame; 910-drainage gap.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout this specification, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 1 is a schematic top view of a battery cover plate assembly according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional view of a battery cover plate assembly according to an embodiment of the present invention. Wherein the position of the cutting plane in fig. 2 refers to the a-a plane in fig. 1.

Referring to fig. 1 to 2, the battery cover plate assembly of the present embodiment includes a cover plate body 100 and

poles

200P and 200N. The

poles

200P and 200N are connected to the cover plate body 100. The

poles

200P and 200N are used to connect a battery core of the battery and an external device, so as to realize transmission of electric energy.

Fig. 3 is a schematic structural diagram of a cover plate body according to an embodiment of the present invention.

Referring to fig. 1 to 3, the cap body 100 has an upper end surface 110 and a lower end surface 120 oppositely disposed in a thickness direction. When the battery cover plate assembly is disposed on the battery, the upper end surface 110 of the cover plate body 100 faces the outside of the battery, and the lower end surface 120 of the cover plate body 100 faces the electric core inside the battery. The cover plate body 100 has

pole mounting holes

130P, 130N through which the

poles

200P, 200N pass, and the

pole mounting holes

130P, 130N are through holes that pass through the upper end surface 110 and the lower end surface 120 of the cover plate body 100. The number of the

pole mounting holes

130P, 130N is the same as the number of the

poles

200P, 200N, and the

poles

200P, 200N are inserted into the corresponding

pole mounting holes

130P, 130N.

The cover plate body 100 further includes an explosion-proof hole 140, and the explosion-proof hole 140 is used for installing an explosion-proof device. The temperature inside the battery is often along with the rising of pressure when rising, and through setting up explosion-proof equipment, explosion-proof equipment carries out the pressure release when battery internal pressure rises, can prevent that the battery from exploding. In the present embodiment, the explosion-proof device includes an explosion-proof plate 300, and the explosion-proof plate 300 is disposed in the explosion-proof hole 140 and may be fixed in the explosion-proof hole 140 by welding, for example. The thickness of the explosion-proof sheet 300 is smaller than the whole thickness of the cover plate body 100, so that when the internal pressure of the battery is increased, the explosion-proof sheet 300 is firstly broken or is subjected to desoldering compared with other parts, the pressure of the battery is relieved, and the explosion of the battery is prevented.

In the present embodiment, the cross-sectional size of the explosion proof hole 140 gradually increases from the lower end surface 120 of the cap body 100 to the upper end surface 110, wherein the cross-section of the explosion proof hole 140 refers to a cross-section perpendicular to the axial direction of the explosion proof hole 140. That is, the explosion proof hole 140 is gradually enlarged from the lower end surface 120 to the upper end surface 110 of the cap plate. Through setting up explosion-proof hole 140 for the flaring type structure, the air current when can guide the pressure release better guarantees the security of battery use. Alternatively, the explosion-proof hole 140 may be provided at the middle of the cap body 100, which may ensure the stability of the entire structure of the cap body 100.

Fig. 4 is a schematic structural view of a stent according to an embodiment of the present invention.

Referring to fig. 2 and 4, the battery cover plate assembly further includes a bracket 400, and the bracket 400 is disposed at the lower end surface 120 of the cover plate body 100. The bracket 400 may be used to mount the

poles

200P, 200N. The bracket 400 has an avoiding hole 411 for the

pole

200P, 200N to pass through, and the avoiding hole 411 is communicated with the

pole mounting holes

130P, 130N on the cover plate body 100. After the bracket 400 is connected to the cover plate body 100, the

posts

200P and 200N may sequentially pass through the corresponding avoiding holes 411 and the

post mounting holes

130P and 130N.

In the present embodiment, the bracket 400 further has an explosion-proof chamber 412, and the position of the explosion-proof chamber 412 corresponds to the explosion-proof hole 140 on the cover plate body 100. The explosion-proof cavity 412 is opposite to the explosion-proof sheet 300 in the explosion-proof hole 140, and when the pressure is released, the air flow in the battery flows to the explosion-proof hole 140 through the explosion-proof cavity 412 and then flows out of the battery from the explosion-proof hole 140. The explosion-proof chamber 412 has a lower opening 412a, and the lower opening 412a of the explosion-proof chamber 412 is opposite to the inside of the battery when the battery cover plate assembly is disposed on the battery. The explosion-proof chamber 412 is constricted at the lower opening 412a, that is, the cross section (cross section perpendicular to the thickness direction of the bracket 400) inside the explosion-proof chamber 412 is larger than that of the lower opening 412 a. Therefore, the explosion-proof chamber 412 has a structure in which the lower opening 412a is contracted and the inside is wide, and the pressure inside the explosion-proof chamber 412 is relatively stable. When the internal pressure of the battery rises, because the internal pressure of the explosion-proof cavity 412 is relatively low, the gas in the battery core of the battery enters the explosion-proof cavity 412 through the lower opening 412a, and then impacts the explosion-proof sheet 300, so that the explosion-proof sheet 300 is broken and the gas flow flows out of the explosion-proof hole 140. Through setting up explosion-proof chamber 412 that has the lower opening 412a of shrink, can play good guide effect to the air current, guarantee the controllability of pressure release position, promote the security of battery.

The structure of the bracket 400 may be set according to the structure of the cap plate body 100 and the installation manner of the battery cap plate assembly on the battery. In this embodiment, the stent 400 includes a stent body 410, a first strut 420, and a second strut 430. The avoiding hole 411 and the explosion-proof chamber 412 are disposed on the bracket body 410, and the first branch piece 420 and the second branch piece 430 are disposed at an interval in a lateral direction of the bracket body 410. The first branch piece 420 and the second branch piece 430 extend from the side edge of the bracket body 410 to a direction away from the bracket body 410, wherein the first branch piece 420 extends along the lower end surface 120 of the cover plate body 100, and the second branch piece 430 is substantially parallel to the first branch piece 420. Optionally, both ends of the stent body 410 in the length direction are provided with a first branch piece 420 and a second branch piece 430. Therefore, the outer contour of the bracket 400 is similar to an I-shaped structure, so that the bracket 400 has higher compressive strength and can ensure the safety of the battery.

The bracket 400 may be a unitary structure or a split structure. In one embodiment, the frame 400 may be a split structure, for example, the frame 400 includes a negative pole support for mounting the negative pole 200N, a positive pole support for mounting the positive pole 200P, and an explosion-proof support having an explosion-proof cavity 412, and the negative pole support, the explosion-proof support, and the positive pole support may be detachably connected. Thus, the flexibility of assembly can be improved, and the corresponding constituent members on the bracket 400 can be replaced according to different models of the battery cover plate assembly.

The cap body 100 further has a filling hole 150, and the filling hole 150 penetrates the upper end surface 110 and the lower end surface 120 of the cap body 100 to fill the electrolyte into the battery. When the battery is manufactured, after the electrolyte is injected into the battery through the injection hole 150, the injection hole 150 is closed to prevent the electrolyte from leaking from the injection hole 150.

In this embodiment, the liquid inlet 150 gradually shrinks from the upper end surface 110 to the lower end surface 120 of the cover plate body 100, and has a structure similar to a funnel, which can provide a good guiding function when injecting the electrolyte. The explosion-proof chamber 412 also has an upper opening 412b, and the upper opening 412b of the explosion-proof chamber 412 is disposed opposite to the explosion-proof hole 140. Further, the upper opening 412b of the explosion-proof chamber 412 is disposed opposite to the liquid injection hole 150, the liquid injection hole 150 is disposed outside the explosion-proof hole 140 and communicates with the upper opening 412b of the explosion-proof chamber 412 of the holder 400, and the electrolyte passes through the liquid injection hole 150 and then flows into the battery cell through the explosion-proof chamber 412. The number of the liquid injection holes 150 can be selected according to the requirement, and in this embodiment, the number of the liquid injection holes 150 is two, so that the liquid injection efficiency can be improved. The two injection holes 150 are respectively provided at both ends of the explosion-proof hole 140, and the injection hole 150 is provided between the explosion-proof hole 140 and the

post mounting holes

130P, 130N.

Optionally, the battery cover plate assembly further includes a drain frame 900, and the drain frame 900 is disposed at the lower end surface 120 of the cover plate body 100 and at the upper opening 412 b. A drainage gap 910 is formed between the drainage frame 900 and the side wall of the upper opening 412b of the explosion-proof chamber 412, and the drainage gap 910 corresponds to the liquid injection hole 150 and is communicated with the liquid injection hole 150. When electrolyte is injected into the battery, the drainage frame 900 can guide the flow direction of the electrolyte. In one embodiment, the number of drain racks 900 is equal to the number of pour holes 150, and each drain rack 900 is positioned adjacent to a corresponding pour hole 150. For example, if there are two pour holes 150, two drain racks 900 may be provided near the corresponding pour holes 150.

Fig. 5 is a schematic structural view of a pole according to an embodiment of the present invention. Fig. 6 is a partial structural schematic diagram of a battery cover plate assembly according to an embodiment of the present invention.

Referring to fig. 2, 5 and 6, the

poles

200P, 200N include pole main bodies 210, and the pole main bodies 210 are inserted into the corresponding

pole mounting holes

130P, 130N of the cover plate body 100. The post main body 210 has a first end and a second end oppositely arranged along the axial direction, wherein the first end of the post main body 210 penetrates through the upper end surface 110 of the cover plate body 100, and the second end is back to the upper end surface 110. The pole body 210 may be in a rotary shape or a non-rotary shape, and may be specifically disposed as required. In this embodiment, the post main body 210 may be approximately cylindrical, and the

post mounting holes

130P and 130N are corresponding circular holes, which may facilitate the mounting between the

posts

200P and 200N and the cover plate body 100.

In this embodiment, the

poles

200P and 200N further include a limiting table 220, and the limiting table 220 is connected to the second end of the pole body 210. The size of the limiting table 220 in the radial direction is larger than that of the second end of the pole body 210, thereby forming a stepped structure, so that the limiting table 220 cannot enter the avoiding hole 411 on the bracket 400. The limiting table 220 is disposed on a side of the bracket 400 away from the cover body 100, and presses the bracket 400 against the lower end surface 120 of the cover body 100. Further, one side that the cover plate body 100 was kept away from to support 400 is provided with utmost point post constant head tank 414 with spacing platform 220 assorted, utmost point post constant head tank 414, dodge hole 411 and utmost point post mounting hole 130P, the basically coaxial setting of 130N, spacing platform 220 arranges utmost point post constant head tank 414 in and can fix a position and fix

utmost point post

200P, 200N.

In the present embodiment, there are two

poles

200P and 200N, and the two

poles

200P and 200N are a positive pole 200P and a negative pole 200N, respectively. Positive and

negative posts

200P and 200N are spaced apart and electrically insulated from each other. Accordingly, there are two

pole mounting holes

130P, 130N, and the two

pole mounting holes

130P, 130N are a positive pole mounting hole 130P and a negative pole mounting hole 130N, respectively. Positive post 200P is inserted into positive post mounting hole 130P, and negative post 200N is inserted into negative post mounting hole 130N. Of course, the battery cover plate assembly may have other numbers of the

poles

200P, 200N and the

pole mounting holes

130P, 130N as needed.

Alternatively, the explosion-proof hole 140 is provided between the two

post mounting holes

130P, 130N, one injection hole 150 is provided between the explosion-proof hole 140 and the negative post mounting hole 130N, and the other injection hole 150 is provided between the explosion-proof hole 140 and the positive post mounting hole 130P. The two

pole mounting holes

130P, 130N, the two liquid injection holes 150, and the explosion-proof hole 140 are arranged substantially along the same line, which can ensure the strength of each part of the cover plate body 100.

In some embodiments, the battery cover plate assembly further includes

conductive blocks

700P and 700N, and the

conductive blocks

700P and 700N are connected to the first ends of the corresponding pole bodies 210. The

conductive blocks

700P, 700N are used to connect with an external device to transmit power. The

conductive blocks

700P and 700N may be shaped as needed, for example, in a rectangular block shape, a cylindrical shape, a truncated cone shape, or the like. The size of the conducting blocks 700P and 700N in the direction perpendicular to the axis is larger than the size of the first end of the pole body 210 in the corresponding direction, and after the conducting blocks 700P and 700N are connected with the pole body 210, the conducting blocks can play a role in fixing and limiting the

poles

200P and 200N, so that the

poles

200P and 200N are prevented from being loosened downwards. The

conductive pieces

700P and 700N may be connected to the pole body 210 by welding (e.g., friction welding, plasma penetration welding, electron beam welding, or the like), riveting, or the like. The pole posts 200P and 200N are restrained from both ends by the

conductive blocks

700P and 700N and the restraining table 220, and the pole posts 200P and 200N can be prevented from moving axially.

Optionally, the

conductive blocks

700P and 700N have fixing holes matching the shape of the first end of the post body 210, and the first end of the post body 210 is installed in the fixing holes and then welded, so that the connection strength can be improved. In this embodiment, the first end of the pole body 210 has a wedge-shaped block 211, and the

conductive blocks

700P and 700N have a wedge-shaped hole 710 corresponding to the wedge-shaped block 211. When the

conductive blocks

700P and 700N are mounted on the post body 210, the wedge-shaped block 211 is placed in the wedge-shaped hole 710 and wedged tightly, and then the

conductive blocks

700P and 700N are connected with the post body 210 by welding and the like, so that the connection strength between the

conductive blocks

700P and 700N and the post body 210 can be effectively improved. The pole body 210 and the

conductive blocks

700P and 700N are connected in the mode of the wedge-shaped block 211 and the wedge-shaped hole 710, so that the tight combination of the pole body 210 and the connection surfaces of the

conductive blocks

700P and 700N can be ensured, the connection strength can be enhanced, the fluctuation of the contact resistance of the connection positions of the

conductive blocks

700P and 700N and the pole body 210 when the battery is subjected to vibration impact is reduced, and the battery can stably output current.

In some embodiments, the battery cover plate assembly further includes

positioning members

800P, 800N for positioning the

conductive blocks

700P, 700N. The

positioning members

800P and 800N have third through holes 810 and conductive block positioning slots 820, the third through holes 810 are penetrated by the post main body 210, and the conductive block positioning slots 820 are arranged on one sides of the

positioning members

800P and 800N opposite to the cover plate body 100 and communicated with the third through holes 810; the size of the third through hole 810 is adapted to the pole body 210, so as to prevent the

positioning members

800P and 800N from shaking after being connected with the pole body 210. The conducting block positioning groove 820 and the third through hole 810 are arranged basically coaxially, the wedge-shaped block 211 of the pole body 210 can penetrate into the conducting block positioning groove 820 from the third through hole 810, the conducting blocks 700P and 700N can be placed in the conducting block positioning groove 820 to be positioned and connected with the pole body 210, and position positioning between the conducting

blocks

700P and 700N and the

poles

200P and 200N is achieved.

In this embodiment, the battery cover plate assembly further includes

seals

500A, 500B. The number of the

sealing elements

500A and 500B is matched with the number of the

poles

200P and 200N, and the

sealing elements

500A and 500B are sleeved outside the corresponding

poles

200P and 200N and used for sealing between the

poles

200P and 200N and the cover plate body 100, so that electrolyte of a battery cell is prevented from leaking out of a battery from gaps between the

poles

200P and 200N and the cover plate body 100. The sealing

members

500A and 500B may be made of materials such as high molecular polymer, rubber, silica gel, and composite materials, and may be specifically selected according to actual needs.

In some embodiments, the cover plate body 100 is made of an electrical conductor material, for example, the cover plate body 100 may be made of an aluminum alloy or other metal conductive material. Alternatively, the cover plate body 100 is formed into a corresponding shape and structure by stamping, cutting, etc. a metal plate. The

poles

200P and 200N may be electrically connected to or electrically insulated from the cap body 100 as required to transmit electric energy. Further, depending on whether the

poles

200P, 200N need to be conductively connected with the cover plate body 100, the sealing

members

500A, 500B may be selected from corresponding materials. When the

poles

200P and 200N need to be conductively connected to the cover plate body 100, the sealing

members

500A and 500B sleeved outside the

poles

200P and 200N may be made of a conductive material; when the

poles

200P and 200N need to be electrically insulated from the cover plate body 100, the sealing

members

500A and 500B sleeved outside the

poles

200P and 200N are made of insulating materials.

In the present embodiment, the negative electrode tab 200N is electrically insulated from the cap body 100, and the positive electrode tab 200P is electrically connected to the cap body 100. If necessary, the negative electrode tab 200N may be electrically connected to the cap body 100, and the positive electrode tab 200P may be electrically insulated from the cap body 100, or may be disposed in other equivalent manners. It should be understood that, when the positive and

negative posts

200P and 200N and the cover plate body 100 adopt other connection schemes, the structure and connection manner of the relevant components of the battery cover plate assembly described in the embodiments of the present invention should be adjusted accordingly.

Fig. 7 is a schematic structural view of a first seal member according to an embodiment of the present invention. Fig. 8 is a schematic structural view of a second seal member according to an embodiment of the present invention.

Referring to fig. 2, 6-8, the sealing

members

500A, 500B have first through holes 510 through which the

poles

200P, 200N pass, and the size of the first through holes 510 matches the size of the pole body 210, so as to prevent gaps between the pole body 210 and the inner walls of the first through holes 510. The sealing

members

500A, 500B have penetrating segments 520, the penetrating segments 520 penetrating into the corresponding

pole mounting holes

130P, 130N. The outer dimensions of the penetrating segment 520 are matched with the dimensions of the corresponding

pole mounting holes

130P, 130N, so that the penetrating segment 520 can play a good role in sealing between the pole body 210 and the

pole mounting holes

130P, 130N.

The

seal

500A, 500B also has at least one sealing

flange

530, 540, the sealing

flange

530, 540 being connected to the end of the penetrating segment 520 and extending away from the axis of the penetrating segment 520. The sealing

flanges

530 and 540 are disposed outside the

pole mounting holes

130P and 130N and abut against the upper end surface 110 or the lower end surface 120 of the cover plate body 100, so that the sealing effect can be improved. Both ends of the penetrating segment 520 may be provided with sealing

flanges

530, 540, or only one end of the penetrating segment 520 may be provided with sealing

flanges

530, 540.

In one embodiment, the

seals

500A, 500B comprise a first seal 500A. Referring to fig. 6 and 7, the first seal 500A has two sealing

flanges

530 and 540, the two sealing

flanges

530 and 540 being a lower sealing flange 530 and an upper sealing flange 540, respectively, the lower sealing flange 530 and the upper sealing flange 540 being provided at both ends of the penetrating segment 520, respectively. The distance between the upper sealing flange 540 and the lower sealing flange 530 is adapted to the thickness of the cap body 100 such that the lower sealing flange 530 can be coupled to the lower end surface 120 of the cap body 100 and the upper sealing flange 540 is coupled to the upper end surface 110 of the cap body 100. The first seal 500A has a certain elasticity, and when the first seal 500A is installed, one of the sealing flanges (e.g., the upper sealing flange 540 or the lower sealing flange 530) can be folded and passed through the

pole mounting holes

130P, 130N; after passing through the

pole mounting holes

130P, 130N, the seal flange (e.g., the upper seal flange 540 or the lower seal flange 530) is restored to abut on the end face of the cap body 100.

In another embodiment, the

seals

500A, 500B comprise a second seal 500B. Referring to fig. 8, the second seal 500B has one sealing flange, which is a lower sealing flange 530. The lower sealing flange 530 is connected to one end of the penetrating segment 520 and abuts against the lower end surface 120 of the cap body 100. The length of the penetrating section 520 of the second sealing member 500B may be adapted to the length of the corresponding

pole mounting hole

130P, 130N, so that the upper end of the penetrating section 520 may be substantially flush with the upper end surface 110 of the cover plate body 100 after the second sealing member 500B is connected to the cover plate body 100. Further, the battery cover plate assembly may further include a spacer block 600, the spacer block 600 has a second through hole 610 for the

pole

200P, 200N to pass through, and the spacer block 600 is disposed on the upper end surface 110 of the cover plate body 100.

In this embodiment, the supporter 400 further has fixing grooves 413 corresponding to the lower sealing flange 530. The fixing groove 413 is disposed at one side of the bracket 400 opposite to the lower end surface 120 of the cover plate body 100, and both ends of the fixing groove 413 are respectively communicated with the

pole mounting holes

130P and 130N and the avoiding hole 411. The securing groove 413 is sized to match the lower sealing flange 530. When the bracket 400 is connected to the cover plate body 100, the lower sealing flange 530 may be received in the fixing groove 413, and the bracket 400 may press the lower sealing flange 530 against the lower end surface 120 of the bracket 400 body, thereby ensuring a good sealing effect.

Referring to fig. 2, in the present embodiment, the battery cover plate assembly includes two sealing

members

500A and 500B, the two sealing

members

500A and 500B are respectively a first sealing member 500A and a second sealing member 500B, the first sealing member 500A is sleeved outside the negative pole 200N, and the second sealing member 500B is sleeved outside the positive pole 200P. The first sealing member 500A may be made of an insulating material so that the negative electrode tab 200N can be insulated from the cap body 100. The second through hole 610 of the spacer 600 has a size corresponding to the pole body 210 of the positive pole 200P, and after the positive pole 200P passes through the second seal member 500B, the spacer 600 is fitted over the positive pole 200P and abuts against the upper end surface 110 of the cover plate body 100. According to the requirement, the spacer block 600 may be made of a conductor material, and the conductive connection between the positive post 200P and the cover plate body 100 may be achieved through the spacer block 600, so that a potential difference may be generated between the positive post 200P and the negative post 200N, and the battery may output electric energy outwards. Of course, the positive post 200P may also be provided with an insulating spacer 600 or may be sealed by the first sealing member 500A, and then electrically connected to the cover plate body 100 by other means.

In the present embodiment, there are two

conductive blocks

700P and 700N, and the two

conductive blocks

700P and 700N are a positive conductive block 700P and a negative conductive block 700N, respectively. The positive electrode conductive piece 700P is connected to the positive electrode post 200P, and the negative electrode conductive piece 700N is connected to the negative electrode post 200N. The shapes, materials, and the like of the positive electrode conductive block 700P and the negative electrode conductive block 700N may be selected according to performance requirements of the battery, and the positive electrode conductive block 700P and the negative electrode conductive block 700N may be the same or different.

Optionally, there are two positioning

members

800P and 800N, the two

positioning members

800P and 800N are a positive positioning member 800P and a negative positioning member 800N, respectively, and the positive positioning member 800P and the negative positioning member 800N are used for positioning the positive conductive block 700P and the negative conductive block 700N, respectively. The negative electrode positioning member 800N is disposed above the upper sealing flange 540 of the first sealing member 500A, and presses the upper sealing flange 540 of the first sealing member 500A against the upper end surface 110 of the cap body 100 to achieve a good sealing effect. The positive electrode positioning member 800P is sleeved outside the positive electrode pillar 200P, is disposed above the spacer 600, and presses the spacer 600 against the upper end surface 110 of the cover plate body 100.

One possible assembly process of the battery cover plate assembly of the present embodiment is described below:

referring to fig. 2 and 6, first, the rupture disk 300 is fixed in the rupture hole 140. Then, one of the sealing flanges (e.g., the upper sealing flange 540 or the lower sealing flange 530) of the first sealing member 500A is folded and inserted through the negative mounting hole, so that the first sealing member 500A is coupled to the cap body 100. The negative electrode holder for mounting the negative electrode tab 200N is then coupled to the lower end surface 120 of the cap body 100 such that the lower sealing flange 530 of the first sealing member 500A is received in the fixing groove 413. Then, the post body 210 of the negative post 200N sequentially passes through the avoiding hole 411 and the first through hole 510 of the first sealing member 500A, and the limiting table 220 abuts against the bottom of the post positioning groove 414. Next, the negative electrode positioning member 800N is mounted to the negative electrode pillar 200N, and then the wedge-shaped hole 710 of the negative electrode conductive block 700N is fixedly connected to the wedge-shaped block 211 of the negative electrode pillar 200N, so that the negative electrode conductive block 700N is positioned in the negative electrode positioning member 800N. Then, the negative electrode conductive block 700N and the negative electrode tab 200N are welded and fixed, and the negative electrode tab 200N is mounted. The explosion proof bracket is mounted to the lower end surface 120 of the cap body 100.

The second sealing member 500B is mounted to the lower end surface 120 of the cap plate body 100 such that the penetrating segment 520 is inserted into the positive mounting hole. Then, the positive electrode holder for mounting the positive electrode post 200P is coupled to the lower end surface 120 of the cap plate body 100, so that the lower sealing flange 530 of the second sealing member 500B is received in the fixing groove 413. The post body 210 of the positive post 200P is sequentially inserted through the avoiding hole 411 and the first through hole 510 of the second sealing member 500B, and the limiting table 220 is abutted against the bottom of the post positioning groove 414. The cushion block 600 is sleeved on the pole body 210 of the positive pole 200P, then the positive pole positioning piece 800P is installed on the positive pole 200P, the wedge-shaped hole 710 of the positive pole conductive piece 700P is fixedly connected with the wedge-shaped piece 211 of the positive pole 200P, and the positive pole conductive piece 700P is positioned in the positive pole positioning piece 800P. Then, positive electrode conductive block 700P and positive electrode post 200P are welded and fixed, and positive electrode post 200P is mounted. Finally, the drainage frame 900 is installed on the lower end surface 120 of the cover plate body 100, so that the drainage frame 900 corresponds to the drainage frame.

It should be understood that the above-mentioned assembling process is only one possible assembling method, and is not intended to limit the present invention, and those skilled in the art may assemble the components according to other possible assembling sequences as needed.

The embodiment of the utility model also provides a battery, which comprises a shell, a battery core body and a battery cover plate assembly in at least part of embodiments of the utility model. The shell has the chamber that holds of holding electricity core body, and electricity core body holding is in the shell. The battery cover plate component is connected with the shell, and the battery cell body is packaged in the shell. The positive pole and the negative pole of the battery cell body are respectively and electrically connected with the positive pole column and the negative pole column. By arranging the battery cover plate component, the safety performance, the sealing performance and the structural strength of the battery can be effectively improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cover plate assembly, comprising:

the cover plate comprises a cover plate body (100) and a base plate, wherein the cover plate body (100) is provided with an upper end surface (110) and a lower end surface (120) which are oppositely arranged, the cover plate body (100) is provided with pole mounting holes (130P, 130N) and an explosion-proof hole (140) which penetrate through the upper end surface (110) and the lower end surface (120), and the cross-sectional size of the explosion-proof hole (140) is gradually increased from the lower end surface (120) to the upper end surface (110) of the cover plate body (100);

an explosion-proof sheet (300) disposed in the explosion-proof hole (140);

the support (400) is arranged on the lower end face (120) of the cover plate body (100), the support (400) is provided with an avoiding hole (411) and an explosion-proof cavity (412), the avoiding hole (411) is communicated with the pole mounting holes (130P and 130N), the explosion-proof cavity (412) is arranged opposite to the explosion-proof sheet (300), the explosion-proof cavity (412) is provided with a lower opening (412a), and the explosion-proof cavity (412) is contracted at the lower opening (412 a); and

the pole column (200P, 200N) penetrates through the pole column mounting hole (130P, 130N) and the avoiding hole (411).

2. The battery cover plate assembly of claim 1, further comprising:

the sealing element (500A, 500B) is provided with a first through hole (510) for the pole (200P, 200N) to pass through, the sealing element (500A, 500B) is provided with a penetrating section (520) and at least one sealing flange (530, 540), the sealing flange (530, 540) is connected with the penetrating section (520), the penetrating section (520) is arranged in the pole mounting hole (130P, 130N) in a penetrating mode, the outer contour size of the penetrating section (520) is matched with that of the pole mounting hole (130P, 130N), and the sealing flange (530, 540) abuts against the upper end face (110) or the lower end face (120) of the cover plate body (100).

3. The battery cover plate assembly of claim 2, wherein the sealing member (500A, 500B) comprises at least one first sealing member (500A), the first sealing member (500A) has two sealing flanges (530, 540), the two sealing flanges (530, 540) are a lower sealing flange (530) and an upper sealing flange (540), the lower sealing flange (530) and the upper sealing flange (540) are respectively disposed at both ends of the penetrating section (520), the lower sealing flange (530) abuts against the lower end surface (120) of the cover plate body (100), and the upper sealing flange (540) abuts against the upper end surface (110) of the cover plate body (100).

4. The battery cover plate assembly of claim 2, wherein the seal (500A, 500B) comprises at least one second seal (500B), the second seal (500B) having one sealing flange (530, 540), the sealing flange (530, 540) being a lower sealing flange (530), the lower sealing flange (530) being connected to one end of the penetrating segment (520) and abutting against the lower end face (120) of the cover plate body (100);

the battery cover plate assembly further includes:

a spacer block (600) having a second through hole (610) for the pole (200P, 200N) to pass through, the spacer block (600) being disposed on the upper end surface (110) of the cover plate body (100).

5. The battery cover plate assembly according to claim 3 or 4, wherein a side of the bracket (400) opposite to the lower end surface (120) of the cover plate body (100) has a fixing groove (413), the fixing groove (413) communicates with the pole mounting hole (130P, 130N) and the escape hole (411), and the lower sealing flange (530) is disposed in the fixing groove (413).

6. The battery cover plate assembly according to claim 1, wherein the pole (200P, 200N) comprises:

the pole body (210) is provided with a first end and a second end which are opposite to each other, the first end of the pole body (210) penetrates out of the upper end face (110) of the cover plate body (100), and the first end of the pole body (210) is provided with a wedge-shaped block (211);

the battery cover plate assembly further includes:

and the conductive blocks (700P, 700N) are provided with wedge-shaped holes (710) corresponding to the wedge-shaped blocks (211), and the wedge-shaped holes (710) are connected with the wedge-shaped blocks (211).

7. The battery cover plate assembly of claim 6, further comprising:

positioning pieces (800P, 800N) for positioning the conductive blocks (700P, 700N), wherein the positioning pieces (800P, 800N) have third through holes (810) and conductive block positioning grooves (820), the third through holes (810) are used for the pole main body (210) to pass through, and the conductive block positioning grooves (820) are arranged on one sides of the positioning pieces (800P, 800N) back to the cover plate body (100);

the wedge-shaped block (211) extends into the conductive block positioning groove (820), and the conductive blocks (700P, 700N) are positioned in the conductive block positioning groove (820).

8. The battery cover plate assembly according to claim 1, wherein the cover plate body (100) further has:

and the liquid injection hole (150) is gradually contracted from the upper end face (110) to the lower end face (120), and the liquid injection hole (150) is arranged on the outer side of the explosion-proof hole (140) and communicated with the explosion-proof cavity (412).

9. The battery cover plate assembly of claim 8, wherein the explosion-proof chamber (412) further has an upper opening (412b), the upper opening (412b) being disposed opposite the explosion-proof hole (140) and the injection hole (150);

the battery cover plate assembly further includes:

the drainage frame (900) is connected with the lower end face (120) of the cover plate body (100) and is arranged at the upper opening (412b), a drainage gap (910) is formed between the drainage frame (900) and the side wall of the upper opening (412b), and the drainage gap (910) is communicated with the liquid injection hole (150).

10. The battery cover plate assembly of claim 1, wherein the bracket (400) comprises:

a bracket body (410) having the relief hole (411) and the explosion-proof cavity (412);

a first support piece (420) which is arranged in the lateral direction of the bracket body (410) and is abutted against the lower end surface (120) of the cover plate body (100); and

and the second branch piece (430) is arranged in parallel with the first branch piece (420) at intervals.

11. The battery cover plate assembly according to claim 1, wherein the cover plate body (100) has two pole mounting holes (130P, 130N) arranged at intervals, the two pole mounting holes (130P, 130N) being a positive pole mounting hole (130P) and a negative pole mounting hole (130N), respectively;

the number of the poles (200P and 200N) is two, the two poles (200P and 200N) are respectively a positive pole (200P) and a negative pole (200N), the positive pole (200P) penetrates through the positive pole mounting hole (130P), and the negative pole (200N) penetrates through the negative pole mounting hole (130N);

the battery cover plate assembly further comprises two sealing members (500A, 500B), the two sealing members (500A, 500B) are respectively a first sealing member (500A) and a second sealing member (500B), the first sealing member (500A) is sleeved outside the negative pole column (200N), the second sealing member (500B) is sleeved outside the positive pole column (200P), and the sealing members (500A, 500B) are provided with first through holes (510) for the corresponding pole columns (200P, 200N) to pass through;

the sealing element (500A, 500B) is provided with a penetrating section (520) and a lower sealing flange (530), the penetrating section (520) is arranged in the pole mounting hole (130P, 130N) in a penetrating mode, the sealing flange (530, 540) is arranged at the end portion of the penetrating section (520), and the lower sealing flange (530) abuts against the lower end face (120) of the cover plate body (100);

the first sealing element (500A) is also provided with an upper sealing flange (540), the upper sealing flange (540) is arranged at one end of the penetrating section (520) far away from the lower sealing flange (530), and the upper sealing flange (540) abuts against the upper end face (110) of the cover plate body (100);

the battery cover plate assembly is also provided with a cushion block (600), the cushion block (600) is provided with a second through hole (610) for the positive pole (200P) to pass through, and the cushion block (600) is arranged on the upper end face (110) of the cover plate body (100);

the battery cover plate assembly further comprises two conductive blocks (700P, 700N) and two positioning pieces (800P, 800N), the two conductive blocks (700P, 700N) are respectively a positive conductive block (700P) and a negative conductive block (700N), the two positioning pieces (800P, 800N) are respectively a positive positioning piece (800P) and a negative positioning piece (800N), the negative positioning piece (800N) presses the upper sealing flange (540) on the upper end face (110) of the cover plate body (100), and the positive positioning piece (800P) presses the cushion block (600) on the upper end face (110) of the cover plate body (100);

the cover plate body (100) is also provided with two liquid injection holes (150), and the liquid injection holes (150) are communicated with the explosion-proof cavity (412);

the explosion-proof hole (140) is arranged between the two pole mounting holes (130P, 130N), one of the two liquid injection holes (150) is arranged between the explosion-proof hole (140) and the positive pole mounting hole (130P), and the other is arranged between the explosion-proof hole (140) and the negative pole mounting hole (130N).

12. A battery, comprising:

a housing;

the battery cell body is accommodated in the shell; and

the battery cover plate assembly of any of claims 1-11, the battery cover plate assembly encapsulating the cell body within the housing.