CN216958252U

CN216958252U - Battery cover plate assembly and battery

Info

Publication number: CN216958252U
Application number: CN202220123921.7U
Authority: CN
Inventors: 王先文; 苑丁丁; 杜双龙
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-07-12
Anticipated expiration: 2032-01-18

Abstract

The utility model discloses a battery cover plate assembly and a battery, and belongs to the technical field of power batteries. This battery cover plate subassembly includes top cover plate, terminal and insulating part, and the terminal includes utmost point post and flange, and during the mounting hole on the top cover plate was worn to establish by utmost point post, the insulating part was located one side of top cover plate and fixes utmost point post on the top cover plate, and the flange is located the opposite side of top cover plate, and flange and top cover plate joint. This battery cover plate subassembly utilizes the insulating part to fix utmost point post in top cap plate one side to utilize the flange of terminal to block the opposite side of top cap plate and prevent that utmost point post from breaking away from the top cap plate, cooperate through the flange of insulating part and terminal and be fixed in the top cap plate with utmost point post on, compare in prior art and saved the clamp plate structure, required spare part has been reduced, thereby make this battery cover plate subassembly simple structure, the equipment process is few, the packaging efficiency is high, low in manufacturing cost, still alleviateed the weight of battery cover plate subassembly, be favorable to improving battery energy density.

Description

Battery cover plate assembly and battery

Technical Field

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

Background

At present, a cover plate assembly generally comprises a plurality of mutually independent parts such as a top pressing plate, a positive pole, a negative pole and a connecting piece, and the cover plate assembly can be formed only after the independent parts are subjected to a plurality of processes such as inserting, press fitting and welding. However, the existing cover plate assembly has the problems of complex structure, multiple production processes, low efficiency and high manufacturing cost due to numerous parts. According to statistics, only the cost of the cover plate assembly can account for 10% -40% of the cost of the single battery, so that the cost of the battery module is too high, and the development of the battery industry is not facilitated.

Therefore, how to provide a battery cover plate assembly and a battery with few parts, simple structure, high assembly efficiency and low cost is a technical problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The first object of the present invention is to provide a battery cover plate assembly, which has few parts, a simple structure, few assembling processes, high assembling efficiency and low manufacturing cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a battery cover plate assembly comprising: the top cover plate is provided with a mounting hole; terminal and insulating part, the terminal includes utmost point post and flange, utmost point post wears to establish in the mounting hole, the insulating part is located one side of lamina tecti will utmost point post is fixed on the lamina tecti, the flange is located lamina tecti's opposite side, just the flange with the lamina tecti joint.

As a preferred technical solution of the above battery cover plate assembly, the terminal includes a positive terminal and a negative terminal, the insulating member includes a positive insulating member and a negative insulating member, the mounting hole includes a positive mounting hole and a negative mounting hole, and the positive mounting hole and the negative mounting hole are arranged at an interval on the top cover plate;

the positive terminal comprises a positive pole column and a positive flange, the positive pole column is arranged in the positive mounting hole in a penetrating mode, the positive insulating piece is located on one side of the top cover plate and fixes the positive pole column on the top cover plate, the positive flange is located on the other side of the top cover plate, and the positive flange is clamped with the top cover plate; the negative terminal comprises a negative pole post and a negative flange, the negative pole post is arranged in the negative mounting hole in a penetrating mode, the positive insulating part is located on one side of the top cover plate and fixes the negative pole post on the top cover plate, the negative flange is located on the other side of the top cover plate, and the negative flange is connected with the top cover plate in a clamped mode.

As a preferred technical scheme of the battery cover plate assembly, a plurality of first positive connecting grooves are formed in the positive pole along the circumferential direction at intervals, and the first positive connecting grooves and the top cover plate are respectively connected with the positive insulating part in an injection molding manner;

the negative pole post is equipped with a plurality of first negative pole spread grooves along the circumferencial direction interval, first negative pole spread groove with the lamina tecti respectively with the negative pole insulating part is moulded plastics and is connected.

As a preferred technical solution of the above battery cover plate assembly, a plurality of the first positive connection grooves are disposed at equal intervals in the circumferential direction on the periphery of the upper end of the positive pole; and/or the presence of a gas in the gas,

a plurality of first negative pole spread groove along circumferencial direction equidistant set up in the upper end periphery of negative pole utmost point post.

As a preferred technical solution of the battery cover plate assembly, a second positive connecting groove is formed in a peripheral side wall of the positive pole along a circumferential direction, the second positive connecting groove is located below the first positive connecting groove, and the second positive connecting groove is connected with the positive insulating member in an injection molding manner; and/or the presence of a gas in the gas,

the periphery lateral wall of negative pole utmost point post is equipped with the second negative pole spread groove along the circumferencial direction, the second negative pole spread groove is located the below of first negative pole spread groove, the second negative pole spread groove with the negative pole insulating part is moulded plastics and is connected.

As a preferable technical solution of the above battery cover plate assembly, the second positive connection groove and the second negative connection groove are both annular grooves.

As a preferred technical scheme of the battery cover plate assembly, a first accommodating groove is formed in the top cover plate, the first accommodating groove is arranged around the anode mounting hole and is communicated with the anode mounting hole, and the lower part of the anode insulating part is arranged in the first accommodating groove; and/or the presence of a gas in the gas,

and a second accommodating groove is formed in the top cover plate, the second accommodating groove surrounds the negative mounting hole and is communicated with the negative mounting hole, and the lower part of the negative insulating part is arranged in the second accommodating groove.

As a preferred technical solution of the above battery cover plate assembly, one of the positive electrode insulating member and the bottom of the first receiving groove is provided with a first positioning protrusion, and the other is provided with a first positioning groove, and the first positioning protrusion is inserted into the first positioning groove; and/or the presence of a gas in the gas,

and one of the negative electrode insulating piece and the groove bottom of the second accommodating groove is provided with a second positioning lug, the other one of the negative electrode insulating piece and the groove bottom of the second accommodating groove is provided with a second positioning groove, and the second positioning lug is inserted into the second positioning groove.

As a preferred technical solution of the above battery cover plate assembly, the first positioning protrusion and the second positioning protrusion are dovetail sliders, and the first positioning groove and the second positioning groove are dovetail grooves.

As a preferred technical solution of the above battery cover plate assembly, the battery cover plate assembly further includes a positive sealing ring and a negative sealing ring, the positive sealing ring includes a first sealing ring and a second sealing ring which are vertically connected, an end portion of the first sealing ring is clamped between the positive pole post and a side wall of the positive mounting hole and abuts against the positive insulating member, and the second sealing ring is disposed between the top cover plate and the positive flange and abuts against a bottom surface of the top cover plate and a top surface of the positive flange respectively; and/or the presence of a gas in the gas,

the negative pole sealing washer includes perpendicular third sealing ring and the fourth sealing ring of connecting, the tip clamp of third sealing ring is established negative pole utmost point post with between the lateral wall of negative pole mounting hole, and with negative pole insulating part butt, the fourth sealing ring sets up the lamina tecti with between the negative pole flange, and respectively with the bottom surface of lamina tecti with the top surface butt of negative pole flange.

As a preferred technical scheme of the above battery cover plate assembly, the battery cover plate assembly further comprises an insulating support, the insulating support is arranged below the top cover plate, the insulating support comprises an anode flange and an anode insulating plate between the top cover plate and a cathode insulating plate between the cathode flange and the top cover plate, the anode insulating plate is provided with a first avoidance hole, and the cathode insulating plate is provided with a second avoidance hole.

As the preferable technical scheme of the battery cover plate assembly, the insulating support is provided with a positioning groove, and the positioning groove is used for positioning the top cover plate.

As a preferred technical scheme of the battery cover plate assembly, the positioning groove comprises a first positioning step, the top cover plate is provided with a second positioning step, and the first positioning step is matched with the second positioning step.

As a preferred technical scheme of the above battery cover plate assembly, the battery cover plate assembly further includes an anode connecting plate and a cathode connecting plate, the anode connecting plate and the cathode connecting plate both include a convex hull structure and a first cross piece, the convex hull structure is vertically arranged on the first cross piece, the convex hull structure of the anode connecting plate is abutted and fixedly connected to the bottom surface of the anode pole, the convex hull structure of the cathode connecting plate is abutted and fixedly connected to the bottom surface of the cathode pole, and the first cross piece is located on the other side of the top cover plate and electrically connected to a pole lug of a battery cell.

As a preferred technical solution of the battery cover plate assembly, a first abutting groove is formed in one side of the positive pole close to the battery core, and the convex hull structure is inserted into the first abutting groove and connected with the positive pole;

and a second butting groove is formed in one side, close to the battery cell, of the negative pole column, and the convex hull structure is inserted into the second butting groove and connected with the negative pole column.

As a preferred technical solution of the above battery cover plate assembly, the convex hull structure includes an annular side plate and a second cross plate, the second cross plate is connected to the top opening of the annular side plate, the first cross plate is provided with an annular opening, an annular side line of the bottom opening of the annular side plate is connected to an annular side line of the annular opening, and the second cross plate is parallel to the first cross plate.

A second object of the present invention is to provide a battery having a small number of parts, a simple structure, a small number of assembly processes, high assembly efficiency, and low manufacturing cost.

a battery comprises a battery shell, a battery cell and a battery cover plate assembly, wherein the battery shell is provided with a mounting cavity, the battery cell is arranged in the mounting cavity, and the battery cover plate assembly is covered at an opening of the mounting cavity.

The utility model has the beneficial effects that:

the utility model provides a battery cover plate assembly and a battery with the same. This battery cover plate subassembly utilizes the insulating part to fix utmost point post in top cap plate one side, and utilize the flange of terminal to block the opposite side of top cap plate and prevent that utmost point post breaks away from the top cap plate, cooperate through the flange of insulating part and terminal and be fixed in the top cap plate with utmost point post on, press plate structure has been saved in comparison with prior art, required spare part quantity has been reduced, make this battery cover plate subassembly simple structure on the one hand, the equipment process is few, the packaging efficiency is high, low in manufacturing cost, on the other hand has alleviateed the weight of battery cover plate subassembly, be favorable to improving battery energy density.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a top view of a battery cover plate assembly provided in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a battery cover plate assembly taken along the line A-A in accordance with an embodiment of the present invention;

fig. 3 is a partially enlarged view of a portion B in fig. 2;

fig. 4 is a partially enlarged view of a portion C in fig. 2.

The figures are labeled as follows:

100. a top cover plate;

200. a positive electrode assembly; 201. a positive terminal; 2011. a positive pole column; 20111. a first positive connecting groove; 20112. a second positive connecting groove; 2012. a positive electrode flange; 202. a positive electrode insulator; 2021. a first positioning bump; 2022. a first insulating ring; 203. a positive electrode connecting sheet; 2031. a convex hull structure; 20311. a loop-shaped side panel; 20312. a second cross piece; 2032. a first cross piece; 204. a positive electrode seal ring; 2041. a first seal ring; 2042. a second seal ring;

300. a negative electrode assembly; 301. a negative terminal; 3011. a negative electrode post; 30111. a first negative connecting groove; 3012. a negative electrode flange; 302. a negative electrode insulating member; 303. a negative electrode connecting sheet; 304. a negative electrode sealing ring;

400. an explosion-proof sheet; 401. a protective sheet; 500. a liquid injection hole; 600. an insulating support; 601. and a positive insulating plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention can be embodied in many different forms than those herein described and many modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

This embodiment provides a battery cover plate subassembly, this battery cover plate subassembly can be arranged in the battery, and with be located the battery electric core electric connection in the installation cavity of battery casing to the open-top of shutoff installation cavity. This battery cover plate subassembly includes top cover plate 100, terminal and insulating part, and the terminal includes utmost point post and flange, and during the mounting hole on the top cover plate was worn to establish by utmost point post, the insulating part was located one side of top cover plate and fixes utmost point post on the top cover plate, and the flange is located the opposite side of top cover plate, and flange and top cover plate joint. This battery cover plate subassembly utilizes the insulating part to fix utmost point post in top cap plate one side, and utilize the flange of terminal to block the opposite side of top cap plate and prevent that utmost point post breaks away from the top cap plate, cooperate through the flange of insulating part and terminal and be fixed in the top cap plate with utmost point post on, press plate structure has been saved in comparison with prior art, required spare part quantity has been reduced, make this battery cover plate subassembly simple structure on the one hand, the equipment process is few, the packaging efficiency is high, low in manufacturing cost, on the other hand has alleviateed the weight of battery cover plate subassembly, be favorable to improving battery energy density.

Specifically, as shown in fig. 1 to 4, the battery cover plate assembly includes a top cover plate 100, a positive electrode assembly 200, and a negative electrode assembly 300, the positive electrode assembly 200 includes a positive electrode terminal 201 and a positive electrode insulator 202, and the negative electrode assembly 300 includes a negative electrode terminal 301 and a negative electrode insulator 302. In the present embodiment, the terminals described above refer to the positive terminal 201 and the negative terminal 301, and the insulators refer to the positive insulator 202 and the negative insulator 302.

As shown in fig. 1, the top cover plate 100 is a rectangular plate-like structure that is stamped and formed from a flat sheet of material. Optionally, the corners of the top cover plate 100 are provided with rounded corners to avoid scratching battery assemblers and scratching battery cells. In the present embodiment, the number of the mounting holes is two, and the two mounting holes are respectively a positive mounting hole and a negative mounting hole which are arranged on the top cover plate 100 at an interval. In the present embodiment, the positive electrode mounting hole and the negative electrode mounting hole have the same shape and are both circular holes. Of course, in other embodiments, the positive mounting hole and the negative mounting hole may be provided in other shapes as required.

As shown in fig. 2 to 4, the positive electrode insulator 202 is disposed above the top cover plate 100 and above the positive electrode mounting hole. The center of the positive insulation member 202 is provided with a first through hole, and the first through hole has the same shape as the positive mounting hole and is communicated with the positive mounting hole. The negative electrode insulator 302 is disposed above the top cap plate 100 and above the negative electrode mounting hole. The center of the negative insulation member 302 is provided with a second through hole, and the second through hole has the same shape as the negative mounting hole and is in direct communication with the negative mounting hole. Alternatively, the top view shape of the positive electrode insulator 202 and the top view shape of the negative electrode insulator 302 may be circular as shown in fig. 1, that is, the positive electrode insulator 202 and the negative electrode insulator 302 are both circular rings, although the top view shape of the positive electrode insulator 202 and the top view shape of the negative electrode insulator 302 may be other shapes according to requirements, which are not listed here.

As shown in fig. 2 to 4, the positive terminal 201 is made of aluminum, and includes an integrally formed positive pole 2011 and a positive flange 2012. The positive pole 2011 is inserted into the positive mounting hole and connected to the positive insulating member 202, specifically connected to the first insertion hole. The positive electrode flange 2012 is located at the other side of the top cover plate 100, and the positive electrode flange 2012 is clamped with the top cover plate 100. Negative terminal 301 is an upper aluminum lower copper composite material that includes an integrally formed negative post and negative flange 3012. The negative pole column portion is arranged in the negative pole mounting hole in a penetrating mode, is connected with the negative pole insulating part 302 and is specifically connected in the second penetrating hole. The negative flange 3012 is located on the other side of the top cover plate 100, and the negative flange 3012 is clamped to the top cover plate 100.

Optionally, positive pole 2011 is equipped with a plurality of first positive pole connecting grooves 20111 along the circumferencial direction interval, and first positive pole connecting groove 20111 and top shroud 100 are connected with positive pole insulator 202 injection moulding respectively, pass through injection moulding promptly for positive pole insulator 202 closely laminates fixedly together with positive pole 2011 and top shroud 100 respectively, and joint strength is higher, and the size is more accurate.

Negative pole post 3011 is equipped with a plurality of first negative pole connecting grooves 30111 along the circumferencial direction interval, and first negative pole connecting groove 30111 and lamina tecti 100 are connected with negative pole insulating part 302 injection moulding respectively, promptly through injection moulding for negative pole insulating part 302 closely laminates fixedly together with negative pole post 3011 and lamina tecti 100 respectively, and joint strength is higher, and the size is more accurate.

Further, a plurality of first positive pole connecting grooves 20111 are arranged at the periphery of the upper end of the positive pole 2011 at equal intervals along the circumferential direction, the overlooking shape of the positive pole 2011 is in a gear shape, the connecting area of the positive pole 2011 and the positive insulation part 202 can be effectively increased by arranging the first positive pole connecting grooves 20111, the structural strength between the positive pole 2011 and the positive insulation part 202 is increased, the connecting stability is improved, the relative rotation between the positive pole 2011 and the positive insulation part 202 is prevented, the plurality of first positive pole connecting grooves 20111 are uniformly arranged, and the connecting uniformity between the positive pole 2011 and the positive insulation part 202 can be improved. A plurality of first negative pole connecting grooves 30111 set up in negative pole post 3011's upper end periphery along equidistance of circumferencial direction, make negative pole post 3011's the shape of overlooking be the gear form, can effectively increase the area of being connected of negative pole post 3011 and negative insulation piece 302 through setting up first negative pole connecting groove 30111, structural strength between negative pole post 3011 and the negative insulation piece 302 has been increased, thereby improve and connect the steadiness, prevent to take place relative rotation between the two, a plurality of first negative pole connecting grooves 30111 evenly set up, can improve the connection homogeneity between negative pole post 3011 and the negative insulation piece 302.

Further, a second positive electrode connecting groove 20112 is formed in the peripheral side wall of the positive electrode post 2011 along the circumferential direction, the second positive electrode connecting groove 20112 is located below the first positive electrode connecting groove 20111, and the second positive electrode connecting groove 20112 is connected with the positive electrode insulating member 202 in an injection molding mode. By providing the second positive connecting groove 20112, the connection strength and the connection stability between the positive pole 2011 and the positive insulating member 202 are further improved. The periphery lateral wall of negative pole post 3011 is equipped with the second negative pole spread groove along the circumferencial direction, and the second negative pole spread groove is located the below of first negative pole spread groove 30111, and the second negative pole spread groove is connected with negative pole insulating part 302 injection moulding. By providing the second cathode connecting groove, the connection strength and connection stability between the cathode post 3011 and the cathode insulating member 302 are further improved.

Further optionally, the first positive connecting groove 20111 and the first negative connecting groove 30111 are both in the form of circumferential keyways, and the second positive connecting groove 20112 and the second negative connecting groove are both annular grooves. Of course, the shape of each connecting groove can be set to other shapes according to requirements, and is not listed here.

In some embodiments, as shown in fig. 3 and 4, the positive terminal 201 and the negative terminal 301 may be formed by partially extruding and drawing thick materials, that is, thicker materials, and the edges of the materials are thinned by stretching in the form of partial extrusion. In this process, the middle part of the material does not deform, and is still a columnar block, the part with larger thickness is the positive pole 2011 or the negative pole 3011, and is used for being connected with the outside, and the part with larger thickness can guarantee not to be welded through when being connected with the outside, and the edge of the material is extruded to form a thin plate structure, and the thin plate structure surrounds the circumference of the columnar block and is thinner, and the thin plate structure is the positive flange 2012 or the negative flange 3012. The stretch forming method for manufacturing the positive terminal 201 and the negative terminal 301 by adopting the plates with uniform extrusion thickness is simpler to operate and is beneficial to improving the manufacturing efficiency.

The positive terminal 201 and the negative terminal 301 of the battery cover plate assembly provided by the embodiment can adopt a process of firstly extruding and then turning the groove, so that the material consumption is low, the requirement on production equipment is low, the process is simple, the excellent rate of the process is high, the manufacturing cost is low, and the equipment capital investment is low. When the positive terminal 201 and the negative terminal 301 which are made in the above mode are assembled with the battery shell, the occupied space inside the battery shell is small, so that the space for accommodating the battery cell inside the battery shell is enlarged, and the energy density of the cell is improved. In addition, through set up the spread groove on positive negative terminal 301, realized positive negative terminal 301, the injection moulding of top cover plate and insulating part is connected, increased the structural strength between utmost point post and the insulating part, thereby improve and connect the steadiness, simultaneously, compared with prior art still saved positive negative pressure plate structure, reduced the required spare part quantity of battery cover plate subassembly, make this battery cover plate subassembly simple structure on the one hand, the production process is few, the packaging efficiency is high, low in manufacturing cost, on the other hand has alleviateed the weight of battery cover plate subassembly, the process reliability is higher, be favorable to improving battery energy density. The structure of the pressing plate is omitted, so that the process of welding the pressing plate and the pole is omitted, the assembly process is simple, and the cost is reduced. In addition, the reduction of welding process still does benefit to and reduces the risk of producing the tiny particle foreign matter to reduced the short circuit risk that the tiny particle foreign matter got into battery electricity core and led to, promoted the product yield, and reduced the risk that the pole portion was penetrated by the melt at very big degree.

Optionally, in order to improve the structural compactness of the battery cover plate assembly and reduce the overall height of the battery cover plate assembly, a first accommodating groove is formed in the top cover plate 100, the first accommodating groove is arranged around the positive electrode mounting hole and is communicated with the positive electrode mounting hole, and the lower portion of the positive electrode insulating member 202 is arranged in the first accommodating groove. A second receiving groove is formed in the top cover plate 100, the second receiving groove surrounds the negative electrode mounting hole and is communicated with the negative electrode mounting hole, and the lower portion of the negative electrode insulating member 302 is disposed in the second receiving groove. The shape of the first receiving groove is set according to the shape of the positive electrode insulator 202, and the shape of the second receiving groove is set according to the shape of the negative electrode insulator 302.

Further, the positive insulator 202 and the negative insulator 302 are molded parts manufactured by an injection molding process, and can perform an insulation protection function between the positive terminal 201 and the top cover plate 100, and between the negative terminal 301 and the top cover plate 100. Further, in order to improve the assembly accuracy, a first positioning protrusion 2021 is disposed on one of the positive electrode insulator 202 and the bottom of the first receiving groove, and a first positioning groove is disposed on the other of the positive electrode insulator 202 and the bottom of the first receiving groove, and the first positioning protrusion 2021 is inserted into the first positioning groove, so that circumferential positioning of the positive electrode insulator 202 and the first receiving groove is achieved, and rotation of the positive electrode insulator 202 is avoided. Further optionally, a second positioning protrusion is disposed on one of the negative electrode insulator 302 and the bottom of the second receiving groove, and a second positioning groove is disposed on the other of the negative electrode insulator 302 and the bottom of the second receiving groove, and the second positioning protrusion is inserted into the second positioning groove, so that circumferential positioning of the negative electrode insulator 302 and the second receiving groove is achieved, and rotation of the negative electrode insulator 302 is avoided. In this embodiment, the first positioning bump 2021 is located at the bottom end of the positive insulation member 202, the first positioning groove is opened at the bottom of the first receiving groove, the second positioning bump is located at the bottom end of the negative insulation member 302, and the second positioning groove is opened at the bottom of the second receiving groove. Preferably, the first positioning protrusion 2021 and the second positioning protrusion are both dovetail sliders, the first positioning groove and the second positioning groove are both dovetail grooves, and the dovetail grooves and the dovetail sliders are matched in a high-precision motion mode and have a more stable structure.

The lower portion of the positive electrode insulator 202 in this embodiment includes a first insulating ring 2022, the outer diameter of the first insulating ring 2022 is the same as the diameter of the positive electrode mounting hole, the height of the first insulating ring 2022 is smaller than the depth of the positive electrode mounting hole, and the first insulating ring 2022 is inserted into the upper portion of the positive electrode mounting hole and attached to the positive electrode pole 2011. The lower part of the negative electrode insulator 302 includes a second insulating ring, the outer diameter of the second insulating ring is the same as the diameter of the negative electrode mounting hole, the height of the second insulating ring is smaller than the depth of the negative electrode mounting hole, and the second insulating ring is inserted into the upper part of the negative electrode mounting hole and attached to the negative electrode post 3011. Through this structural setting, the joint strength and the steadiness of positive negative terminal 301 and lamina tecti 100 have been improved.

Still further, as shown with continued reference to fig. 3 and 4, the battery cover plate assembly further includes a positive seal 204 and a negative seal 304. With continued reference to fig. 3, positive seal ring 204 includes a first seal ring 2041 and a second seal ring 2042 that are vertically connected. The first sealing ring 2041 is cylindrical, the second sealing ring 2042 is circular, and the first sealing ring 2041 is vertically connected to an inner annular surface of the second sealing ring 2042. The outer diameter of the first seal ring 2041 is equal to the diameter of the positive electrode mounting hole, and the height of the first seal ring 2041 is equal to the difference between the depth value of the positive electrode mounting hole and the height value of the first insulation ring 2022, so that the first seal ring 2041 can abut against the first insulation ring 2022 when the end portion of the first seal ring 2041 is inserted between the positive electrode pole 2011 and the side wall of the positive electrode mounting hole. The second seal ring 2042 is disposed between the bottom surface of the top lid plate 100 and the positive electrode flange 2012, and abuts against the bottom surface of the top lid plate 100 and the top surface of the positive electrode flange 2012, respectively.

The negative seal ring 304 includes a third seal ring and a fourth seal ring that are vertically connected. The third sealing ring is cylindrical, the fourth sealing ring is a circular ring, and the third sealing ring is vertically connected to the inner ring surface of the fourth sealing ring. The outer diameter of the third seal ring is equal to the diameter of the negative electrode mounting hole, and the height of the third seal ring is equal to the difference between the depth value of the negative electrode mounting hole and the height value of the second insulating ring, so that when the end portion of the third seal ring is inserted between the negative electrode post 3011 and the side wall of the negative electrode mounting hole, the third seal ring can abut against the second insulating ring. The fourth seal ring is provided between the bottom surface of the top lid plate 100 and the negative electrode flange 3012, and abuts against the bottom surface of the top lid plate 100 and the top surface of the positive electrode flange 2012, respectively.

Optionally, the positive sealing ring 204 and the negative sealing ring 304 are made of an acid-base-resistant and high-temperature-resistant elastomer material, and the specific material is not limited herein and is selected according to the requirement. The positive seal ring 204 and the negative seal ring 304 are compressed during assembly of the battery cover plate assembly to provide a seal.

Further, as shown with continued reference to fig. 3 and 4, the battery cover plate assembly further includes an insulating holder 600, and the insulating holder 600 is disposed under the top cover plate 100. The insulating support 600 includes an anode insulating plate 601 sandwiched between the anode flange 2012 and the top cover plate 100, and a cathode insulating plate sandwiched between the cathode flange 3012 and the top cover plate 100, where a first avoiding hole is provided on the anode insulating plate 601 facing the anode sealing ring 204, and a second avoiding hole is provided on the cathode insulating plate facing the cathode sealing ring 304. The positive electrode insulating plate 601 and the negative electrode insulating plate are integrally formed. Moreover, the insulating support 600 further includes a protruding ring disposed at the edge of the insulating plate 601, and the protruding ring protrudes to a side away from the top cover plate 100 to perform a supporting function. The positive seal ring 204 and the negative seal ring 304 are respectively disposed in the enclosed space defined by the top cover plate 100, the terminal flange and the insulating holder 600. When the battery cover plate assembly is assembled, the top cover plate 100, the insulating support 600, the positive sealing ring 204, the negative sealing ring 304, the positive terminal and the negative terminal 301 are assembled, the positive sealing ring 204 and the negative sealing ring 304 are compressed to a specified range, and then the positive insulating part 202 and the negative insulating part 302 are injection molded, so that the whole structure is more compact and firm.

Furthermore, the insulating support 600 is provided with a positioning groove for positioning the top cover plate 100, so that the rapidness and convenience in assembling the top cover plate 100 and the insulating support 600 are improved. Preferably, the positioning groove comprises a first positioning step, the top cover plate 100 is provided with a second positioning step, the first positioning step is matched with the second positioning step, and specifically, the two positioning steps are in butt joint.

The battery cover plate assembly in this embodiment further includes positive connection piece 203 and negative connection piece 303, positive connection piece 203 and negative connection piece 303 all include convex hull structure 2031 and first crosspiece 2032, convex hull structure 2031 adopts the local tensile technology to form, convex hull structure 2031 sets up perpendicularly on first crosspiece 2032, the convex hull structure 2031 butt of positive connection piece 203 and links firmly in the bottom surface of anodal utmost point post 2011, the convex hull structure 2031 butt of negative connection piece 303 and link firmly in the bottom surface of negative pole post 3011, first crosspiece 2032 is located the opposite side of top cap board, and be used for the utmost point ear electric connection with battery electricity core. The electrical connection here may be soldering or bonding with conductive adhesive, and in this embodiment, soldering is selected to ensure connection stability.

Specifically, first crosspiece 2032 is including connecting in two joint pieces of convex hull structure 2031 both sides, and the joint piece can play the positioning action, and can cooperate the joint with the flange of utmost point post, realizes the accurate quick location of connection piece. Furthermore, the two clamping pieces are respectively a first clamping piece and a second clamping piece, the first clamping piece is close to one side of the outer edge of the top cover plate 100, and the second clamping piece extends to form a connecting part used for being connected with the battery core lug.

When the battery cover plate assembly is assembled, the positive connecting sheet 203 and the negative connecting sheet 303 are welded with positive and negative electrode tabs of a battery cell respectively, and then the convex hull structure 2031 of the positive connecting sheet 203 and the convex hull structure 2031 of the negative connecting sheet 303 are welded with the bottom surface of a positive electrode post 2011 and the bottom surface of a negative electrode post 3011 respectively, so that the positive and negative electrode terminals 301 are electrically connected with the positive and negative electrode tabs. The connecting sheet is welded at the bottom of the thick material area in the middle of the terminal, and the sealing ring is kept away from the connecting sheet, so that the adverse effect on the sealing performance of the sealing ring caused by overhigh heat absorption and overhigh temperature rise of the terminal when the connecting sheet is welded is avoided. Optionally, a first abutting groove is formed in one side of the positive electrode post 2011 close to the battery cell, that is, the bottom surface of the positive electrode post 2011, and the convex hull structure 2031 is inserted into the first abutting groove and connected to the positive electrode post 2011; the negative pole 3011 is close to one side of the battery cell, that is, the bottom surface of the negative pole 3011 is provided with a second abutting groove, and the convex hull structure 2031 is inserted into the second abutting groove and connected to the negative pole 3011. Through set up the butt groove in the bottom surface of utmost point post, make things convenient for the location and the connection of connection piece on the one hand, improve connection stability, on the other hand still has the effect that subtracts heavy, practice thrift the cost.

Optionally, the convex hull structure 2031 includes an annular side piece 20311 and a second cross piece 20312, the second cross piece 20312 is connected to the top opening of the annular side piece 20311, the first cross piece 2032 is provided with an annular opening, an annular side line of the bottom opening of the annular side piece 20311 is connected to the annular side line of the annular opening, and the second cross piece 20312 is parallel to the first cross piece 2032. Preferably, the positive connecting piece 203 is made of aluminum material, and the negative connecting piece 303 is made of copper material.

Further, referring to fig. 2, the top cover plate 100 is further provided with an explosion-proof hole and a liquid injection hole 500, the explosion-proof hole and the liquid injection hole 500 are disposed between the positive electrode mounting hole and the negative electrode mounting hole, the explosion-proof hole is disposed near the negative electrode mounting hole, and the liquid injection hole 500 is disposed near the positive electrode mounting hole. Be provided with explosion-proof piece 400 in explosion-proof hole, be equipped with protection plate 401 at the open-top lid in explosion-proof hole, protection plate 401 can play the effect of protection explosion-proof piece 400. In addition, a protective body is arranged below the explosion-proof hole, the protective body can be integrally formed with the insulating plate 601, a splitter plate can be arranged below the liquid injection hole 500, and the splitter plate can be integrally formed with the insulating plate 601.

The embodiment also provides a battery, which comprises a battery shell, a battery core and the battery cover plate component. The battery shell is provided with a mounting cavity, a battery cell is arranged in the mounting cavity, the cover of the battery cover plate component is arranged at the opening of the mounting cavity, a positive electrode tab of the battery cell is welded with the positive electrode connecting sheet 203, a negative electrode tab is welded with the negative electrode connecting sheet 303, a convex hull structure 2031 of the positive electrode connecting sheet 203 is welded with the bottom surface of a positive electrode pole 2011, and a convex hull structure 2031 of the negative electrode connecting sheet 303 is welded with the bottom surface of a negative electrode pole 3011. By using the battery cover plate assembly, the battery provided by the embodiment has the advantages of few parts, simple structure, few assembly processes, high assembly efficiency and low manufacturing cost.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery cover plate assembly, comprising:

the top cover plate (100), wherein the top cover plate (100) is provided with a mounting hole;

terminal and insulating part, the terminal includes utmost point post and flange, utmost point post wears to establish in the mounting hole, the insulating part is located one side of lamina tecti (100) and will utmost point post is fixed on lamina tecti (100), the flange is located the opposite side of lamina tecti (100), just the flange with lamina tecti (100) joint.

2. The battery cover plate assembly of claim 1,

the terminal comprises a positive terminal (201) and a negative terminal (301), the insulating part comprises a positive insulating part (202) and a negative insulating part (302), the mounting hole comprises a positive mounting hole and a negative mounting hole, and the positive mounting hole and the negative mounting hole are arranged on the top cover plate (100) at intervals;

the positive terminal (201) comprises a positive pole post (2011) and a positive flange (2012), the positive pole post (2011) is arranged in the positive mounting hole in a penetrating mode, the positive insulating piece (202) is located on one side of the top cover plate (100) and fixes the positive pole post (2011) on the top cover plate (100), the positive flange (2012) is located on the other side of the top cover plate (100), and the positive flange (2012) is clamped with the top cover plate (100);

negative terminal (301) includes negative pole post (3011) and negative pole flange (3012), negative pole post (3011) wears to establish in the negative pole mounting hole, anodal insulating part (202) are located one side of lamina tecti (100) and will negative pole post (3011) are fixed on lamina tecti (100), negative pole flange (3012) are located the opposite side of lamina tecti (100), just negative pole flange (3012) with lamina tecti (100) joint.

3. The battery cover plate assembly of claim 2,

the positive pole column (2011) is provided with a plurality of first positive connecting grooves (20111) at intervals along the circumferential direction, and the first positive connecting grooves (20111) and the top cover plate (100) are respectively connected with the positive insulating part (202) in an injection molding manner;

negative pole utmost point post (3011) are equipped with a plurality of first negative pole connecting grooves (30111) along the circumferencial direction interval, first negative pole connecting groove (30111) with lamina tecti (100) respectively with negative pole insulating part (302) are moulded plastics and are connected.

4. The battery cover plate assembly of claim 3,

the first positive connecting grooves (20111) are arranged on the periphery of the upper end of the positive pole column (2011) at equal intervals along the circumferential direction; and/or the presence of a gas in the gas,

the first negative electrode connecting grooves (30111) are arranged on the periphery of the upper end of the negative electrode pole (3011) at equal intervals in the circumferential direction.

5. The battery cover plate assembly of claim 3,

a second positive connecting groove (20112) is formed in the peripheral side wall of the positive pole column (2011) along the circumferential direction, the second positive connecting groove (20112) is located below the first positive connecting groove (20111), and the second positive connecting groove (20112) is connected with the positive insulating part (202) in an injection molding mode; and/or the presence of a gas in the atmosphere,

the periphery lateral wall of negative pole utmost point post (3011) is equipped with the second negative pole spread groove along the circumferencial direction, the second negative pole spread groove is located the below of first negative pole spread groove (30111), the second negative pole spread groove with negative pole insulating part (302) are moulded plastics and are connected.

6. The battery cover plate assembly of claim 5,

the second positive connecting groove (20112) and the second negative connecting groove are both annular grooves.

7. The battery cover plate assembly of claim 5 or 6,

a first accommodating groove is formed in the top cover plate (100), the first accommodating groove is arranged around the anode mounting hole and communicated with the anode mounting hole, and the lower portion of the anode insulating piece (202) is arranged in the first accommodating groove; and/or the presence of a gas in the gas,

and a second accommodating groove is formed in the top cover plate (100), the second accommodating groove surrounds the negative mounting hole and is communicated with the negative mounting hole, and the lower part of the negative insulating part (302) is arranged in the second accommodating groove.

8. The battery cover plate assembly of claim 7,

one of the positive electrode insulating piece (202) and the bottom of the first containing groove is provided with a first positioning lug (2021), the other one is provided with a first positioning groove, and the first positioning lug (2021) is inserted into the first positioning groove; and/or the presence of a gas in the gas,

one of the negative electrode insulating piece (302) and the bottom of the second accommodating groove is provided with a second positioning lug, the other one of the negative electrode insulating piece and the bottom of the second accommodating groove is provided with a second positioning groove, and the second positioning lug is inserted into the second positioning groove.

9. The battery cover plate assembly of claim 8,

the first positioning lug (2021) and the second positioning lug are dovetail slide blocks, and the first positioning groove and the second positioning groove are dovetail grooves.

10. The battery cover plate assembly of claim 2,

the battery cover plate assembly further comprises a positive sealing ring (204) and a negative sealing ring (304), the positive sealing ring (204) comprises a first sealing ring (2041) and a second sealing ring (2042) which are vertically connected, the end part of the first sealing ring (2041) is clamped between the positive pole post (2011) and the side wall of the positive mounting hole and is abutted against the positive insulating part (202), and the second sealing ring (2042) is arranged between the top cover plate (100) and the positive flange (2012) and is respectively abutted against the bottom surface of the top cover plate (100) and the top surface of the positive flange (2012); and/or the presence of a gas in the gas,

the negative electrode sealing ring (304) comprises a third sealing ring and a fourth sealing ring which are vertically connected, the end part of the third sealing ring is clamped between the negative electrode pole (3011) and the side wall of the negative electrode mounting hole and is abutted to the negative electrode insulating part (302), and the fourth sealing ring is arranged between the top cover plate (100) and the negative electrode flange (3012) and is respectively abutted to the bottom surface of the top cover plate (100) and the top surface of the negative electrode flange (3012).

11. The battery cover plate assembly of claim 10,

the battery cover plate component further comprises an insulating support (600), the insulating support (600) is arranged below the top cover plate (100), the insulating support (600) is arranged on the positive flange (2012) and the positive insulating plate (601) between the top cover plate (100) and arranged on the negative flange (3012) and the negative insulating plate between the top cover plate (100), the positive insulating plate (601) is provided with a first avoiding hole in the position of the positive sealing ring (204), and the negative insulating plate is provided with a second avoiding hole in the position of the negative sealing ring (304).

12. The battery cover plate assembly of claim 11,

and a positioning groove is arranged on the insulating support (600) and used for positioning the top cover plate (100).

13. The battery cover plate assembly of claim 12,

the locating groove comprises a first locating step, a second locating step is arranged on the top cover plate (100), and the first locating step is matched with the second locating step.

14. The battery cover plate assembly of claim 2,

the battery cover plate component further comprises an anode connecting plate (203) and a cathode connecting plate (303), the anode connecting plate (203) and the cathode connecting plate (303) comprise convex hull structures (2031) and first cross pieces (2032), the convex hull structures (2031) are perpendicularly arranged on the first cross pieces (2032), the convex hull structures (2031) of the anode connecting plate (203) are abutted and fixedly connected to the bottom surface of the anode pole (2011), the convex hull structures (2031) of the cathode connecting plate (303) are abutted and fixedly connected to the bottom surface of the cathode pole (3011), and the first cross pieces (2032) are positioned on the other side of the top cover plate (100) and are electrically connected with the lugs of the battery cell.

15. The battery cover plate assembly of claim 14,

a first abutting groove is formed in one side, close to the battery cell, of the positive pole post (2011), and the convex hull structure (2031) is inserted into the first abutting groove and connected with the positive pole post (2011);

one side of the negative pole post (3011) close to the battery cell is provided with a second butt joint groove, and the convex hull structure (2031) is inserted into the second butt joint groove and connected with the negative pole post (3011).

16. The battery cover plate assembly of claim 14,

the convex hull structure (2031) comprises an annular side piece (20311) and a second cross piece (20312), the second cross piece (20312) is connected at the top opening of the annular side piece (20311), an annular opening is arranged on the first cross piece (2032), an annular sideline of the bottom opening of the annular side piece (20311) is connected with the annular sideline of the annular opening, and the second cross piece (20312) is parallel to the first cross piece (2032).

17. A battery comprising a battery housing, a battery cell, and a battery cover assembly as claimed in any one of claims 1 to 16, the battery housing having a mounting cavity, the battery cell being disposed in the mounting cavity, the battery cover assembly covering an opening of the mounting cavity.