CN219419255U - Battery cell - Google Patents

Abstract

The application provides a battery, which comprises a housin, cap subassembly and electric core, cap subassembly and casing lid merge to enclose and establish and hold the chamber, the electric core sets up in this holds the intracavity, cap subassembly includes first cap, second cap and bonding piece, first cap passes through the bonding piece with the second cap and is connected and mutual insulation, be equipped with separation portion on the second cap, the separation portion encircles the circumference setting of first cap, in order to keep off the outside of locating the bonding piece, when first cap and second cap are in hot pressing, the bonding piece of fluid state can be blocked by separation portion, avoid the fluid material of bonding piece to spill over and influence cap subassembly and casing connection, thereby guarantee to hold the chamber and have good leakproofness, avoid holding the electrolyte leakage of intracavity.

Description

Battery cell

Technical Field

The application relates to the technical field of batteries, in particular to a battery.

Background

Batteries are widely used in various power supply devices, including consumer electronics, new energy automobiles, energy storage devices, and the like. The battery has different sizes and structures according to different application scenes, wherein the button battery is a small-sized battery.

In the related art, button cells generally include casing, electric core, cap and insulating gummed paper etc. and electric core can set up inside the casing, and the cap is used for merging the welding with the casing lid, and the cap generally includes anodal and negative pole, and both generally bond through the mode of colloid hot pressing to can be as whole assemble with the casing.

However, when the cover of the battery is connected with the casing, electrolyte in the casing is easy to leak, and potential safety hazards exist.

Disclosure of Invention

In view of the above-mentioned problem, the embodiment of the present application provides a battery to solve the technical problems that the electrolyte in the casing leaks easily and there is a potential safety hazard when the casing cover of the current battery is connected with the casing.

In order to achieve the above-mentioned purpose, this application provides a battery, and this battery includes casing, cap subassembly and electric core, and the cap subassembly is merged with the casing lid and is enclosed to establish and form and hold the chamber, and the electric core sets up in this holds the intracavity.

Wherein, the cap subassembly includes first cap, second cap and bonding piece, and first cap passes through the bonding piece with the second cap to be connected and mutual insulation, is equipped with separation portion on the second cap, and the circumference setting of separation portion surrounding first cap to keep off the outside of locating the bonding piece.

The battery that this application provided through set up separation portion on the second cap for first cap and second cap are when hot pressing, and fluidic bonding spare can be blocked by separation portion, avoids the fluidic material of bonding spare to spill over and influence cap subassembly and casing connection, thereby guarantees to hold the chamber and has good leakproofness, avoids holding the electrolyte in the chamber and leak.

As an alternative embodiment, the second cover may be connected to the housing, and the first cover may be located on a side of the second cover facing away from the housing; the blocking part can be positioned on one side of the second shell cover facing the first shell cover, and the blocking part protrudes out of the surface of the second shell cover.

The separation part can be enclosed to form a closed ring shape, and the bonding piece is limited in the enclosed range in the hot pressing process of the shell cover assembly, so that overflow is avoided.

As an alternative embodiment, the width of the barrier may be 0.5mm or more.

So set up, separation portion can increase the structural strength of second cap, avoids cap subassembly to produce the deformation and leads to electrolyte to leak.

As an alternative embodiment, the distance between the edge of the blocking portion and the outer edge of the second cover may be greater than or equal to 0.5mm.

By the arrangement, the distance between the blocking part and the edge of the second shell cover can be kept, and the bonding piece is prevented from overflowing to the edge of the second shell cover in a fluid state.

As an alternative embodiment, the height of the protrusion of the blocking portion with respect to the surface of the second cover may be 0.1mm or more.

By the arrangement, the blocking part can be guaranteed to have a better blocking effect on the bonding piece in the fluid state.

As an alternative embodiment, the side of the second housing cover facing the receiving chamber has a stamping groove for forming a barrier; the inner wall of the punching groove can be provided with an explosion-proof groove.

So set up, when holding the intracavity and surpassing threshold pressure, can carry out pressure release through tearing the explosion-proof groove to the explosion-proof groove can with second cap integrated into one piece, simplify production technology, reduce cost.

As an alternative embodiment, the depth dimension of the explosion-proof slot may be 60% -80% of the thickness dimension of the second housing cover.

By the arrangement, the force required by tearing the explosion-proof groove can be controlled within a reasonable range.

As an alternative embodiment, the notch width of the explosion-proof groove may be equal to or greater than the groove depth of the explosion-proof groove.

So set up, when holding the chamber pressure and surpassing the threshold value, inside gaseous rising more does benefit to gaseous impact force and tears the explosion-proof groove, avoids the pressure too high and produces the security risk.

As an alternative embodiment, the cover assembly may further include an insulating member, and the insulating member may be disposed at a side of the second cover facing the battery cell; the second shell cover is provided with a through hole, the first shell cover at least partially extends into the through hole, the battery cell is provided with a positive electrode lug and a negative electrode lug, the positive electrode lug can be arranged on one side of the battery cell facing the shell cover assembly, and the positive electrode lug is connected with the first shell cover; the insulating piece can be positioned between the second shell cover and the positive electrode lug; the negative electrode lug is connected with the inner wall of the shell.

The battery cell has good electric energy input and output performance, and meanwhile, the battery cell positive lug and the second shell cover are guaranteed to have good insulation effect.

As an alternative embodiment, the first cover has a liquid injection port, which may be disposed opposite to the through hole; the cap assembly may further include a closure member disposed at the liquid fill port.

So set up, guarantee that the cap subassembly has good sealed effect to the electrolyte that holds the intracavity.

The application provides a battery, which comprises a housin, cap subassembly and electric core, cap subassembly and casing lid merge to enclose and establish and hold the chamber, the electric core sets up in this holds the intracavity, cap subassembly includes first cap, second cap and bonding piece, first cap passes through the bonding piece with the second cap and is connected and mutual insulation, be equipped with separation portion on the second cap, the separation portion encircles the circumference setting of first cap, in order to keep off the outside of locating the bonding piece, when first cap and second cap are in hot pressing, the bonding piece of fluid state can be blocked by separation portion, avoid the fluid material of bonding piece to spill over and influence cap subassembly and casing connection, thereby guarantee to hold the chamber and have good leakproofness, avoid holding the electrolyte leakage of intracavity.

In addition to the technical problems, features constituting the technical solutions, and advantageous effects brought about by the technical features of the technical solutions described above, other technical problems that can be solved by the battery provided by the present application, other technical features included in the technical solutions, and advantageous effects brought about by the technical features will be described in further detail in the detailed description of the present application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a battery provided in an embodiment of the present application;

fig. 3 is a cross-sectional view of a battery provided in an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;

FIG. 5 is a partial view of the position B of FIG. 4;

fig. 6 is a schematic structural view of a sealing member in a battery according to an embodiment of the present disclosure;

fig. 7 is a sectional view in the direction C-C of fig. 6.

Reference numerals illustrate:

100-a housing; 101-a receiving chamber;

200-a housing cover assembly; 210-a first housing cover; 211-a liquid injection port; 212-positioning grooves; 220-a second cover; 221-barrier; 222-punching a groove; 223-explosion-proof tank; 224-a through hole; 230-an adhesive; 240-insulator; 250-sealing piece; 251-positioning the protrusions;

300-cell; 310-positive electrode lug; 320-negative electrode ear; 330-an anode insulating layer; 340-a negative electrode insulating layer.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Batteries are widely used in various power supply devices, including consumer electronics, new energy automobiles, energy storage devices, and the like. The battery has different sizes and structures according to different application scenes, wherein the button battery is a small-sized battery. The button cell generally comprises a shell, a cell, a shell cover, insulating gummed paper and the like, the cell can be arranged inside the shell, the shell cover is used for being combined and welded with the shell cover, the shell cover generally comprises a positive electrode and a negative electrode, and the positive electrode and the negative electrode are bonded in a colloid hot-pressing mode, so that the button cell can be integrally assembled with the shell.

However, the positive electrode and the negative electrode of the shell cover are easy to overflow by colloid in the hot pressing process, so that the liquid colloid overflows to the edge of the shell cover, colloid exists at the welding position of the shell cover and the shell, poor welding exists when the shell cover and the shell are welded, electrolyte leakage is caused, and the battery is scrapped. In addition, the material of the cover is generally relatively thin, which is easy to deform after processing and also causes electrolytic leakage.

The application provides a battery, through set up the separation structure on the cap, the colloid to the fluid state of cap hot pressing in-process blocks to avoid the colloid to spill over to the edge of cap, and then guaranteed to have good welding performance between cap and the casing, prevent that electrolyte from leaking, simultaneously, the separation structure can increase the structural strength of cap, avoids the cap to warp, guarantees that cap and casing have good sealing performance, has improved the yields of battery.

The battery according to the embodiment of the present application is described below with reference to the accompanying drawings. It should be noted that, the battery provided in the embodiment of the present application may be a secondary battery, that is, the battery in the embodiment of the present application may be charged and discharged and recycled, and specific types of the battery may include, but are not limited to, lithium batteries, etc., and the battery may be used in a scenario including, but not limited to, electronic products, energy storage devices, vehicles, etc., such as mobile communication devices, new energy automobiles, etc., and the embodiment of the present application is not limited thereto in particular.

Fig. 1 is a schematic structural view of a battery provided in an embodiment of the present application, fig. 2 is an exploded view of the battery provided in the embodiment of the present application, fig. 3 is a cross-sectional view of the battery provided in the embodiment of the present application, and fig. 4 is a cross-sectional view in A-A direction in fig. 3.

Referring to fig. 1 to 4, a battery according to an embodiment of the present disclosure includes a housing 100, a housing cover assembly 200 and a battery cell 300, wherein the housing cover assembly 200 and the housing 100 are covered and enclosed to form a housing cavity 101, and the battery cell 300 is disposed in the housing cavity 101. Electrolyte can be injected into the accommodating cavity 101, and the shell cover assembly 200 can be in sealing connection with the shell 100, so that the accommodating cavity 101 is ensured to be a closed space, and the electrolyte is prevented from leaking.

The cover assembly 200 includes a first cover 210, a second cover 220, and an adhesive 230, wherein the first cover 210 and the second cover 220 are connected and insulated from each other by the adhesive 230. It will be appreciated that the first cover 210 and the second cover 220 are stacked, the adhesive 230 is located between the first cover 210 and the second cover 220, and the adhesive 230 may be a hot-melt adhesive, and the first cover 210 and the second cover 220 may be connected by hot-pressing, and the adhesive 230 may be melted into a fluid state during the hot-pressing of the first cover 210 and the second cover 220, so that the adhesive 230 may cover a corresponding area between the first cover 210 and the second cover 220, and the first cover 210 and the second cover 220 may have a higher connection strength after the adhesive 230 is cured.

It is understood that one of the first housing cover 210 and the second housing cover 220 is a positive housing cover, and the other is a negative housing cover, for example, the first housing cover 210 may be a positive housing cover, and the second housing cover 220 is a negative housing cover.

In some embodiments, the second cover 220 is provided with a blocking portion 221, and the blocking portion 221 is disposed around the circumference of the first cover 210 to block the outer side of the adhesive member 230. The blocking part 221 may block the flow of the adhesive 230 in a fluid state during the hot pressing of the first and second case covers 210 and 220.

It will be appreciated that the area of the second cover 220 may be larger than that of the first cover 210, the blocking portion 221 may be disposed around the first cover 210, a receiving area may be formed on the second cover 220, the first cover 210 may be disposed in the receiving area, and accordingly, the adhesive member 230 may be disposed in the receiving area, and the adhesive member 230 may be limited in the receiving area when the adhesive member 230 is in a fluid state during the hot pressing process.

It should be noted that, in the battery provided by the embodiment of the present application, the blocking portion 221 is provided on the second casing cover 220, so that the adhesive member 230 in the fluid state can be blocked by the blocking portion 221 when the first casing cover 210 and the second casing cover 220 are hot pressed, and the overflow of the fluid material of the adhesive member 230 is avoided to affect the welding between the casing cover assembly 200 and the casing 100, thereby ensuring that the accommodating cavity 101 has good sealing performance and avoiding the electrolyte leakage in the accommodating cavity 101.

In addition, the adhesive 230 may be PP glue (using ethyl cyanoacrylate as a main component), or the adhesive 230 may be an insulating plastic hot-melt glue with other components, and the specific components of the adhesive 230 are not limited in this embodiment, and only the first casing cover 210 and the second casing cover 220 may be bonded by hot pressing through the adhesive 230.

The specific arrangement position and the structural dimensions of the blocking portion 221 are described in detail below.

Fig. 5 is a partial view of the B position of fig. 4.

Referring to fig. 1 to 5, in one possible implementation manner, the second housing cover 220 may be connected to the housing 100, the first housing cover 210 may be located on a side of the second housing cover 220 facing away from the housing 100, the blocking portion 221 may be located on a side of the second housing cover 220 facing the first housing cover 210, and the blocking portion 221 protrudes from a surface of the second housing cover 220.

It is understood that the second cover 220 may be in the form of a sheet, the housing 100 may be in an open configuration, the cover assembly 200 is opposite the open side of the housing 100, and the edge of the second cover 220 may be opposite the open side of the housing 100 and welded thereto. The first casing cover 210 is located one side of the second casing cover 220 facing away from the accommodating cavity 101, when the first casing cover 210 and the second casing cover 220 are connected through the bonding piece 230 in a hot pressing mode, the blocking portion 221 can be enclosed to form a closed ring shape, the bonding piece 230 of fluid is limited in the enclosed closed ring-shaped range in the hot pressing process of the casing cover assembly 200, the bonding piece 230 is prevented from overflowing, and then the second casing cover 220 and the casing 100 are welded with high welding quality.

For example, the annular shape enclosed by the blocking portion 221 may be matched with the outer edge shape of the first casing 210, the edge shape of the negative casing 100 is matched with the edge shape of the casing 100, for example, the first casing 210 and the second casing 220 may be both solid of revolution, the outer edges of both are circular, the first casing 210 and the second casing 220 may be coaxially disposed, the coverage area of the second casing 220 is larger than that of the first casing 210, the blocking portion 221 is annular, and the first casing 210 is located in the range enclosed by the blocking portion 221. In addition, the first cover 210 and the second cover 220 may take other structural shapes, including but not limited to square, oval, or other regular shapes, which are not specifically limited in the embodiments of the present application.

In some embodiments, the width of the blocking portion 221 may be greater than or equal to 0.5mm, so that the blocking portion 221 may increase the structural strength of the second housing cover 220, and the hot press molding process of the housing cover assembly 200 is summarized, so that electrolyte leakage caused by deformation of the housing cover assembly 200 may be avoided, and the yield of the battery is improved.

It can be appreciated that the first casing cover 210 and the second casing cover 220 may be made of conductive metal, and the blocking portion 221 may be formed by stamping, so that the blocking portion 221 protrudes from the surface of the second casing cover 220, so that the blocking portion 221 may play a role of a reinforcing rib.

Exemplary, specific dimensions of the width of the barrier 221 may be L1, and values that may be used for L1 include, but are not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, etc., and specific values may be set according to specific diameter dimensions of the second cover 220, and the larger the diameter of the second cover 220, the wider the width of the barrier 221 may be, and the specific width values of the barrier 221 are not limited in the embodiments of the present application.

In some embodiments, the distance between the edge of the blocking portion 221 and the outer edge of the second cover 220 may be greater than or equal to 0.5mm, so that the distance between the blocking portion 221 and the edge of the second cover 220 may be maintained within a reasonable range, and the adhesive 230 is prevented from overflowing to the edge of the second cover 220 in the fluid state.

It can be appreciated that, since the position of the blocking portion 221 may be approximately the boundary between the overflow of the adhesive member 230 when the first cover 210 and the second cover 220 are hot pressed, the spacing between the blocking portion 221 and the outer edge of the second cover 220 can keep the boundary between the overflow range of the adhesive member 230 and the second cover 220, so as to avoid the adhesive member 230 from overflowing to the edge of the second cover 220, thereby ensuring the welding reliability of the second cover 220 and the housing 100.

Exemplary, the distance between the edge of the blocking portion 221 and the outer edge of the second cover 220 is L2, and the specific size of L2 may include, but is not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, etc., and the specific value may be set according to the specific diameter sizes of the second cover 220 and the first cover 210, and the inner edge of the blocking portion 221 may be set near the edge of the first cover 210.

In addition, in order to ensure that the blocking portion 221 has a better blocking effect on the adhesive 230 in a fluid state, the height of the protrusion of the blocking portion 221 with respect to the surface of the second case cover 220 may be 0.1mm or more, thereby preventing the adhesive 230 in a fluid state from overflowing over the blocking portion 221 at the time of hot pressing.

Illustratively, the protruding height of the barrier 221 with respect to the surface of the second cover 220 is H, and the size values that may be used for H include, but are not limited to, 0.1mm, 0.2mm, 0.3mm, 0.5mm, 0.8mm, 1mm, etc., and since the barrier 221 may be formed by a stamping operation when the second cover 220 is manufactured, the specific protruding height of the barrier 221 may be set according to the thickness of the second cover 220, and the size values of the protruding height of the barrier 221 with respect to the surface of the second cover 220 are not specifically limited in this embodiment.

In the battery provided in this embodiment of the present application, an explosion-proof groove 223 needs to be provided, for pressure relief when the internal pressure of the battery increases, so as to avoid safety accidents caused by explosion of the battery, and the setting mode and structure of the explosion-proof groove 223 are described in detail below.

Referring to fig. 1 to 5, in one possible implementation manner, a side of the second housing cover 220 facing the accommodating cavity 101 has a stamping groove 222, the stamping groove 222 is used to form the blocking portion 221, an inner wall of the stamping groove 222 may be provided with an explosion-proof groove 223, so that when the accommodating cavity 101 exceeds a threshold pressure, the explosion-proof groove 223 may be torn to release pressure, and the explosion-proof groove 223 may be integrally formed with the second housing cover 220, thereby simplifying a production process and reducing cost.

It is understood that the depth dimension of the explosion proof groove 223 may be 60% -80% of the thickness dimension of the second cover 220, so that the force required for tearing the explosion proof groove 223 can be controlled within a reasonable range. And the explosion-proof groove 223 can be integrally formed in the stamping process of the stamping groove 222 when the second housing cover 220 is manufactured and formed, so that the explosion-proof groove 223 is formed without a separate process step, and the production efficiency is improved.

Illustratively, the ratio of the groove depth dimension of the anti-explosion groove 223 relative to the thickness of the second housing cover 220 may include, but is not limited to, 60%, 65%, 70%, 75%, 80%, etc., taking the example that the groove depth dimension of the anti-explosion groove 223 may be 70% of the thickness dimension of the second housing cover 220, when the pressure in the receiving chamber 101 exceeds the threshold value, the gas rises up to the housing 100 assembly to squeeze the housing cover assembly 200, and the anti-explosion groove 223 may tear to release the pressure.

In some embodiments, the notch width of the explosion-proof groove 223 may be greater than or equal to the groove depth of the explosion-proof groove 223, so that when the pressure of the accommodating cavity 101 exceeds the threshold value, the internal gas rises, which is more beneficial to tearing the explosion-proof groove 223 by the impact force of the gas, and the safety risk caused by the too high pressure is avoided.

For example, the cross-sectional shape of the explosion-proof groove 223 may be a "V" shape, or the cross-sectional shape of the explosion-proof groove 223 may be a shape decreasing from the notch to the groove bottom width, and the specific shape, groove depth, and groove width dimensions of the explosion-proof groove 223 are not particularly limited in the embodiments of the present application.

The specific arrangement of the battery cell 300 and the matching manner of the battery cell 300 and the cover assembly 200 are described in detail below.

With continued reference to fig. 1 to 5, in one possible implementation, the housing cover assembly 200 may further include an insulating member 240, where the insulating member 240 may be disposed on a side of the second housing cover 220 facing the electrical core 300, the second housing cover 220 has a through hole 224, the first housing cover 210 at least partially extends into the through hole 224, the electrical core 300 has a positive tab 310 and a negative tab 320, the positive tab 310 may be disposed on a side of the electrical core 300 facing the housing cover assembly 200, and the positive tab 310 is connected with the first housing cover 210.

It can be appreciated that the insulating member 240 may be located between the second housing cover 220 and the positive electrode tab 310, and the negative electrode tab 320 is connected with the inner wall of the housing 100, so that the positive electrode tab 310 of the battery cell 300 and the second housing cover 220 have good insulating effect while the battery cell 300 has good power input/output performance.

For example, the positive tab 310 may be welded to the first case cover 210 after bending, and the negative tab 320 may be welded to the inside of the bottom wall of the case 100 after bending, i.e., the positive tab 310 and the negative tab 320 may be located at opposite sides of the battery cell 300. In addition, the surface of the battery cell 300 where the positive electrode tab 310 and the negative electrode tab 320 are disposed may be provided with a positive electrode insulating layer 330 and a negative electrode insulating layer 340, respectively, the positive electrode insulating layer 330 being disposed between the body of the battery cell 300 and the positive electrode tab 310, and the negative electrode insulating layer 340 being disposed between the body of the battery cell 300 and the negative electrode tab 320.

The insulating material 240, the positive insulating layer 330 and the negative insulating layer 340 are all insulating materials, and materials that can be used include, but are not limited to, polypropylene (polypropylene, PP), polyethylene (polyethylene, PE), polyvinyl chloride (Polyvinyl chloride, PVC), and polytetrachloroethylene (Polytetrafluoroethylene, PTFE). The insulator 240, the positive electrode insulator 330, and the negative electrode insulator 340 may be made of one or more of the above materials, which is not particularly limited in the embodiments of the present application.

Fig. 6 is a schematic structural view of a sealing member in a battery according to an embodiment of the present application, and fig. 7 is a cross-sectional view in the direction C-C in fig. 6.

Referring to fig. 1 to 7, in some embodiments, the first cover 210 has a liquid injection port 211, the liquid injection port 211 may be disposed opposite to the through hole 224, the battery injects the electrolyte into the accommodating cavity 101 through the liquid injection port 211, and the cover assembly 200 may further include a sealing member 250, where the sealing member 250 is disposed at the liquid injection port 211, so as to ensure that the cover assembly 200 has a good sealing effect on the electrolyte in the accommodating cavity 101.

It can be appreciated that a side of the second housing cover 220 facing the first housing cover 210 may be provided with a limiting groove, the first housing cover 210 may be disposed in the limiting groove, the through hole 224 may be formed at a bottom of the limiting groove, the first housing cover 210 has a connection boss, and the connection boss may pass through the through hole 224 and be welded with the positive tab 310. The surface of the first housing cover 210 may be provided with a positioning groove 212, the liquid injection port 211 may be disposed in the positioning groove 212, the sealing member 250 may have a positioning protrusion 251, and the positioning protrusion 251 may cooperate with the positioning groove 212 to ensure that the sealing member 250 has a good sealing effect on the liquid injection port 211.

For example, the edge region of the sealing member 250 may be welded to the surface of the first cover 210, and the welded seam may form a closed ring shape along the circumference of the sealing member 250, thereby improving the sealing effect.

The battery that this embodiment provided includes casing, cap subassembly and electric core, cap subassembly and casing lid merge and enclose to establish and hold the chamber, the electric core sets up in this holds the intracavity, cap subassembly includes first cap, second cap and bonding piece, first cap passes through the bonding piece with the second cap and is connected and mutual insulation, be equipped with separation portion on the second cap, the circumference setting of first cap is encircleed to separation portion, in order to keep off the outside of locating the bonding piece, when first cap and second cap are hot pressed, fluid state's bonding piece can be blocked by separation portion, avoid the fluid material of bonding piece to spill over and influence the cap subassembly and be connected with the casing, thereby guarantee to hold the chamber and have good leakproofness, avoid holding the electrolyte of intracavity and leak.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be fixedly connected, or indirectly connected through intermediaries, for example, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are therefore not to be construed as limiting the present application.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The utility model provides a battery, its characterized in that includes casing, cap subassembly and electric core, the cap subassembly with the casing lid merges and encloses to establish and form and hold the chamber, the electric core set up in hold the intracavity:

the shell cover assembly comprises a first shell cover, a second shell cover and an adhesive piece, wherein the first shell cover and the second shell cover are connected through the adhesive piece and are mutually insulated, a blocking portion is arranged on the second shell cover, and the blocking portion surrounds the circumferential direction of the first shell cover so as to be blocked outside the adhesive piece.

2. The battery of claim 1, wherein the second housing cover is connected to the housing, and the first housing cover is located on a side of the second housing cover facing away from the housing; the blocking part is positioned on one side of the second shell cover facing the first shell cover, and protrudes out of the surface of the second shell cover.

3. The battery according to claim 2, wherein the width of the barrier portion is 0.5mm or more.

4. The battery according to claim 2, wherein a distance between an edge of the blocking portion and an outer edge of the second case cover is 0.5mm or more.

5. The battery according to claim 2, wherein the height of the protrusion of the blocking portion with respect to the surface of the second case cover is 0.1mm or more.

6. The battery according to any one of claims 1 to 5, wherein a side of the second case cover facing the accommodating chamber has a punched groove forming the blocking portion; the inner wall of the stamping groove is provided with an explosion-proof groove.

7. The battery of claim 6, wherein the explosion-proof slot has a slot depth dimension that is 60% -80% of a thickness dimension of the second housing cover.

8. The battery of claim 6, wherein a slot width of the explosion-proof slot is equal to or greater than a slot depth of the explosion-proof slot.

9. The battery of any one of claims 1-5, wherein the housing cover assembly further comprises an insulator disposed on a side of the second housing cover facing the battery cell; the second shell cover is provided with a through hole, the first shell cover at least partially extends into the through hole, the battery cell is provided with a positive electrode lug and a negative electrode lug, the positive electrode lug is arranged on one side of the battery cell facing the shell cover assembly, and the positive electrode lug is connected with the first shell cover; the insulating piece is positioned between the second shell cover and the positive electrode lug; the negative electrode lug is connected with the inner wall of the shell.

10. The battery of claim 9, wherein the first housing cover has a liquid injection port opposite the through hole; the shell cover assembly further comprises a sealing piece, and the sealing piece is arranged at the liquid injection port.