CN218334181U - Steel shell battery and explosion-proof valve structure thereof - Google Patents
Steel shell battery and explosion-proof valve structure thereof Download PDFInfo
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- CN218334181U CN218334181U CN202221079482.0U CN202221079482U CN218334181U CN 218334181 U CN218334181 U CN 218334181U CN 202221079482 U CN202221079482 U CN 202221079482U CN 218334181 U CN218334181 U CN 218334181U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of battery manufacture, concretely relates to steel-shelled battery and explosion-proof valve structure thereof, explosion-proof valve structure includes: the shell comprises a bottom wall and a side wall arranged around the bottom wall, and the shell is provided with a through hole; the glue nail penetrates through the through hole and is riveted on the shell. The steel-shelled battery includes: the battery cell comprises a main body part, and a first tab and a second tab which are led out from the main body part and have opposite polarities; the cover plate covers the shell to form a sealing cavity for accommodating the battery cell; the shell is also provided with a through hole and a liquid injection hole; the pole assembly is arranged in the through hole and is electrically connected with the first pole lug; the conducting plate is connected with the shell and is electrically connected with the second pole lug; such as the explosion-proof valve structure described above. The utility model provides a glue nail can be at the temperature of box-hat battery and rise before the safe temperature limit melting, and then open the through-hole and form pressure release channel.
Description
Technical Field
The utility model belongs to the technical field of the box hat battery manufacturing process, concretely relates to box hat battery and explosion-proof valve structure thereof.
Background
In recent years, with the popularization of mobile internet devices such as smart phones and notebook computers, the popularization of electric vehicles such as electric bicycles and electric motorcycles, and the development of aerospace technologies such as unmanned aerial vehicles and space detectors, lithium ion batteries face higher development requirements, and small size and high energy density have become the research direction of high-performance lithium ion batteries. Safety issues are an important prerequisite for the development of the lithium ion battery market, in particular for high energy density lithium ion batteries.
Compared with the aluminum plastic film soft package battery which is commonly used at present, the steel shell battery reduces the top and side edge sealing width, increases the space utilization rate, and has higher electric core energy density. The steel-shell battery has high sealing performance and high energy density, but easily generates heat, the steel-shell battery does not have a safety mechanism for temperature control at present, and after the temperature of the steel-shell battery rises and exceeds a safe temperature, the steel-shell battery cannot discharge internal gas, so that the internal gas pressure of the steel-shell battery rises, and hidden danger exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an: aiming at the defects of the prior art, the steel shell battery and the explosion-proof valve structure thereof are provided, the rubber nail can be fused before the temperature of the steel shell battery is raised to the safe temperature limit, and then the through hole is opened to form a pressure relief channel.
In order to realize the purpose, the utility model adopts the following technical scheme:
in a first aspect, the present application provides an explosion-proof valve structure comprising:
the shell comprises a bottom wall and a side wall arranged around the bottom wall, and the shell is provided with a through hole;
the rubber nail penetrates through the through hole and is riveted on the shell.
Further, the surface of the shell body contacted with the rubber nails is a frosted surface subjected to frosting treatment.
Furthermore, a glue layer is arranged between the shell and the glue nails.
Furthermore, the glue nail comprises a nail column and a nail cap, the nail column is connected with the nail cap, the nail column penetrates through the through hole, and the nail cap is arranged on one side of the shell; wherein the content of the first and second substances,
prior to staking, the post includes a body portion;
after riveting, the nail post further comprises an extension part, the extension part is formed by extending the body part transversely along the axis center, and the extension part and the nail cap are respectively arranged on two opposite surfaces of the shell.
Further, before riveting, the thickness of the body portion is greater than the thickness of the housing; after riveting, the thickness of the body part is equal to that of the shell, and the diameter of the extension part is larger than that of the through hole.
Further, the body part is a hollow structure.
In a second aspect, the present application provides a steel can battery comprising:
the battery cell comprises a main body part, and a first tab and a second tab which are led out from the main body part and have opposite polarities;
the cover plate covers the shell to form a sealing cavity for accommodating the battery cell;
the shell is also provided with a through hole and a liquid injection hole;
the pole assembly is arranged in the through hole and is electrically connected with the first pole lug;
the conducting strip is connected with the shell and is electrically connected with the second pole lug;
the explosion proof valve structure according to the first aspect.
Further, the pole assembly comprises a first pole, a second pole, a first gasket and a second gasket;
the first pole is arranged on one surface, close to the battery core, of the shell, and the first gasket is arranged between the first pole and the shell;
the second pole column is arranged on one surface, far away from the battery core, of the shell, and the second gasket is arranged between the second pole column and the shell;
the first pole post is electrically connected with the second pole post.
Further, the second pole post includes a base portion and a post portion, the post portion is connected to the base portion, the first pole post, the first spacer and the second spacer are provided with through holes, and the post portion sequentially passes through the through hole of the second spacer, the through hole of the first spacer and the through hole of the first pole post and is riveted with the first pole post.
Further, the distance from one surface, close to the battery cell, of the glue nail to the battery cell is larger than the distance from one surface, close to the battery cell, of the first pole column to the battery cell; the distance from one surface of the glue nail, far away from the battery cell, to the battery cell is smaller than the distance from one surface of the second pole column, far away from the battery cell, to the battery cell.
The utility model discloses following beneficial effect has at least:
the utility model provides an explosion-proof valve structure is through using the rubber nail riveting in the through-hole of casing, can lead to riveting to take place the melting in the rubber nail when the temperature of battery risees, can open the through-hole after the rubber nail melting, and then can pass through the through-hole with the inside gas of battery and discharge, wherein can make the battery reach the effect of melting the pressure release under the different temperatures through the rubber nail of chooseing for use different melting point materials, prevent that battery high temperature from being fired and exploding, also can be through changing the through-hole diameter size simultaneously, adjust the safe pressure of battery, because under actual conditions, the temperature of battery reaches when the rubber nail melts the temperature, it needs a period to melt the rubber nail. If the diameter of the through hole is small, the pressure applied to the rubber nail is also reduced, so that the rubber nail needs to be completely melted, and the gas in the battery can be discharged; if the diameter is big, the rubber nail receives pressure also can the grow, after reaching the melting temperature, under the dual function of the inside atmospheric pressure of battery and temperature, the rubber nail can in time drop from the through-hole, makes the through-hole form the inside gas of pressure release passageway power supply battery and lets out.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic perspective view of an explosion-proof valve before riveting according to an embodiment of the present invention.
Fig. 2 is a front view of the explosion-proof valve before riveting according to an embodiment of the present invention.
Fig. 3 is a schematic perspective view of a riveted explosion-proof valve according to an embodiment of the present invention.
Fig. 4 is a front view of the riveted explosion-proof valve according to the embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an explosion-proof valve structure according to an embodiment of the present invention.
Fig. 6 is a second schematic structural view of an explosion-proof valve structure according to an embodiment of the present invention.
Fig. 7 is a schematic view of the steel-shell battery according to the embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a housing according to an embodiment of the present invention.
Fig. 9 is a schematic view of the pole assembly according to the embodiment of the present invention.
Wherein the reference numerals are as follows:
1-a shell; 11-bottom wall; 12-a side wall; 13-a through hole; 14-a through hole; 15-liquid injection hole; 16-a conductive sheet; 17-a sealing plug; 2-glue nail; 21-a nail column; 211-a body portion; 212-an extension; 22-nail cap; 3-cover plate; 4-electric core; 41-a body portion; 411-a first tab; 412-a second tab; 5-pole assembly; 51-a first pole; 52-a second pole; 521-a base portion; 522-pillar portion; 53-a first shim; 54-a second gasket; 7-perforating; 8-glue layer.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The following examples are further detailed with reference to fig. 1 to 9, but are not intended to limit the present invention.
The embodiment of the application provides an explosion-proof valve structure, includes:
the shell body 1 comprises a bottom wall 11 and a side wall 12 arranged around the bottom wall 11, and the shell body 1 is provided with a through hole 13;
the glue nail 2, the glue nail 2 wears to locate through-hole 13 to the riveting is in casing 1.
The explosion-proof valve structure of this application embodiment is through using the rubber nail 2 to rivet in through-hole 13 of casing 1, can lead to riveting to take place the melting in rubber nail 2 when the temperature of battery risees, can open through-hole 13 after the rubber nail 2 melting, and then can pass through-hole 13 with the inside gas of battery and discharge, wherein can make the battery reach the effect of melting the pressure release under the different temperatures through the rubber nail 2 of chooseing for use different melting point materials, prevent that battery high temperature from lighting a fire and exploding, also can be through changing through-hole 13 diameter size simultaneously, adjust the safe pressure of battery, because under actual conditions, when the temperature of battery reaches rubber nail 2 and melts the temperature, it needs a period of time to melt rubber nail 2. If the diameter of the through hole 13 is small, the pressure applied on the rubber nail 2 is also reduced, so that the rubber nail 2 needs to be completely melted, and the gas in the battery can be discharged; if the diameter is big, the glue nail 2 receives pressure also can the grow, after reaching the melting temperature, under the dual function of the inside atmospheric pressure of battery and temperature, glue nail 2 can in time drop from through-hole 13, makes through-hole 13 form the inside gaseous effluvium of pressure release passageway confession battery.
Preferably, the through-hole 13 is provided on the side wall 12.
In an alternative embodiment of the present application, the surface of the housing 1 in contact with the glue nail 2 is a frosted surface which is frosted.
Specifically, because the glue nail 2 is together through riveting fixed with casing 1, consequently through carrying out dull polish processing with the casing 1's of glue nail 2 contact surface and obtaining the frosting, and then increased the frictional force between glue nail 2 and the casing 1, promoted the joint strength between glue nail 2 and the casing 1, make glue nail 2 be difficult to drop from casing 1, promoted the leakproofness between glue nail 2 and the casing 1 simultaneously, prevent that electrolyte from revealing.
In an alternative embodiment of the present application, a glue layer 8 is disposed between the housing 1 and the glue nail 2.
Specifically, the contact part surface coating glue of casing 1 and adhesive nail 2, glue 2 hot pressing riveting back solidification glue forms glue film 8, through the contact part surface coating glue at casing 1 and adhesive nail 2, makes adhesive nail 2 not only can also bond with casing 1 riveting simultaneously, and adhesive nail 2 is through two kinds of connection structure and 1 fixed connection of casing, makes the joint strength and the leakproofness of adhesive nail 2 and casing 1 promote.
Or, the surface of the shell 1 in contact with the rubber nails 2 is subjected to sanding treatment to obtain a sanded surface, glue is coated on the sanded surface before the rubber nails 2 are riveted, the glue is cured after the rubber nails 2 are hot-pressed and riveted, and the glue is arranged on the surface of the sanded surface, so that the contact area between the glue and the surface of the shell 1 is increased due to the fact that the surface of the sanded surface is uneven, the bonding force between the glue and the shell 1 is enhanced, and the connection strength and the sealing performance between the rubber nails 2 and the shell 1 are further improved.
It should be noted that the glue used in this embodiment is UV glue, and the glue layer 8 is obtained by UV light curing the UV glue after the glue nails 2 are hot-pressed and riveted. It is understood that the glue layer 8 can also be formed by curing other glues, and is not limited thereto.
In an alternative embodiment of the present application, the glue nail 2 includes a nail column 21 and a nail cap 22, the nail column 21 is connected to the nail cap 22, the nail column 21 penetrates through the through hole 13, and the nail cap 22 is disposed on one side of the housing 1; wherein the content of the first and second substances,
before riveting, the stud 21 comprises a body 211;
after riveting, the stud 21 further includes an extension 212, the extension 212 is formed by extending the body 211 transversely along the axis center, and the extension 212 and the nut 22 are respectively disposed on two opposite surfaces of the housing 1.
Specifically, before riveting, the nail cap 22 is arranged on one side of the shell 1, the diameter of the nail cap 22 is larger than that of the through hole 13, the diameter of the nail post 21 is smaller than or equal to that of the through hole 13, and the body part 211 of the nail post 21 penetrates through the through hole 13 and extends to the side opposite to the nail cap 22; in the riveting process, the body part 211 is deformed by applying pressure to the glue nail 2, the body part 211 is deformed, and part of the body part 211 transversely extends along the surface of the shell 1 to form an extension part 212; after riveting, the nail 2 can be fixed at the position of the through hole 13 of the housing 1 without falling off by the cooperation of the nut 22 and the extension 212.
In an alternative embodiment of the present application, the thickness of the body portion 211 is greater than the thickness of the housing 1 before riveting; after caulking, the thickness of the body portion 211 is equal to that of the housing 1, and the diameter of the extension portion 212 is larger than that of the through hole 13.
Specifically, since the riveting is to apply pressure to the thickness direction of the glue nail 2 to deform the body 211, during the riveting process, the thickness of the body 211 is gradually reduced under the action of the pressure and is expanded along the width direction, so that the width of the body 211 is gradually increased, since the body 211 passes through the through hole 13, the part of the body 211 is accommodated in the through hole 13, when the body 211 is expanded along the width direction, the part of the body 211 located in the through hole 13 is limited by the through hole 13 to extend and is in close contact with the inner wall of the through hole 13, and the part of the body 211 exceeding the through hole 13 is not limited and can extend until the deformation amount of the body 211 reaches the limit, in order to enable the extending part 212 formed by expanding the body 211 to have sufficient thickness and width, the thickness of the body 211 needs to be greater than the thickness of the through hole 13 before the riveting, so as to ensure the structural strength of the extending part 212.
In an alternative embodiment of the present application, the body portion 211 is a hollow structure.
Specifically, since the main body 211 is configured as a hollow structure, the main body 211 can be deformed more easily during the riveting process, and meanwhile, since the main body 211 is configured as a hollow structure, the thickness of the main body 211 at the position of the hollow structure is reduced accordingly, and since the thickness of the main body 211 is reduced, the main body is more easily melted at the melting point temperature, so as to discharge the gas inside the battery in time.
As shown in fig. 5 to 8, an embodiment of the present application further provides a steel-can battery, including:
the battery cell 4 comprises a main body part 41, and a first tab 411 and a second tab 412 which are led out from the main body part 41 and have opposite polarities;
the cover plate 3 covers the shell 1 to form a sealing cavity for accommodating the battery cell 4;
the shell 1 is also provided with a through hole 14 and a liquid injection hole 15;
the pole assembly 5 is arranged in the through hole 14 and electrically connected with the first pole lug 411;
a conductive plate 16 connected to the housing 1 and electrically connected to the second tab 412;
the explosion-proof valve structure of the scheme is described.
Specifically, in the present embodiment, the body portion 211 of the battery cell 4 is formed by sequentially stacking or winding a first pole piece, a diaphragm, and a second pole piece. Batteries operate primarily by virtue of metal ions moving between a first pole piece and a second pole piece. The first pole piece comprises a first current collector and a first active substance layer, and the first active substance layer is coated on the surface of the first current collector; the first current collector includes a first coating region coated with a first active material layer, and a first tab 411 attached to the first coating region, the first tab 411 being not coated with the first active material layer. The second pole piece comprises a second current collector and a second active substance layer, and the second active substance layer is coated on the surface of the second current collector; the second current collector includes a second coated region coated with a second active material layer and a second tab 412 connected to the second coated region, the second tab 412 being uncoated with the second active material layer. Taking a lithium ion battery as an example, the material of the first current collector may be aluminum, the first active material layer includes a first active material, and the first active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The material of the diaphragm can be PP or PE, etc. The material of the second current collector may be copper, the second active material layer includes a second active material, and the second active material may be carbon, silicon, or the like.
Specifically, first utmost point ear 411 welds with utmost point post subassembly 5, second utmost point ear 412 welds with casing 1 or apron 3, conducting strip 16 welds at casing 1, wherein, conducting strip 16, utmost point post subassembly 5 all sets up the lateral wall 12 with one side at casing 1 with gluey nail 2, the setting can make things convenient for external circuit's wiring like this, simultaneously with conducting strip 16, utmost point post subassembly 5 all sets up the lateral wall 12 with gluey nail 2 with one side at casing 1, can reduce the battery and occupy too much space in outside space, influence the ability density of battery. After the battery is filled through the filling hole 15, the filling hole 15 is sealed by using the sealing plug 17.
The box hat electrode of this application embodiment rivets in through-hole 13 of casing 1 through using plastic nail 2, can lead to riveting when the temperature of box hat battery risees and take place the melting in plastic nail 2, can open through-hole 13 after the plastic nail 2 melts, and then can discharge the inside gas of box hat battery through-hole 13, wherein can make the box hat battery reach the effect of melting the pressure release under the different temperatures through the plastic nail 2 of chooseing for use different melting point materials, prevent the box hat battery high temperature explosion on fire, also can be through changing through-hole 13 diameter size simultaneously, adjust the safety pressure of box hat battery, because under actual conditions, when the temperature of box hat battery reaches plastic nail 2 and melts the temperature, it needs a period of time to melt plastic nail 2. If the diameter of the through hole 13 is small, the pressure applied on the rubber nail 2 is also reduced, so that the rubber nail 2 needs to be completely melted, and the gas in the battery can be discharged; if the diameter is big, the glue nail 2 receives pressure also can the grow, after reaching the melting temperature, under the dual function of the inside atmospheric pressure of box hat battery and temperature, glue nail 2 can in time drop from through-hole 13, makes through-hole 13 form the pressure release passageway and supplies the inside gaseous effluvium of battery.
Preferably, the through-hole 14 is provided in the side wall 12, and the through-hole 14 is provided in the side wall 12 on the side where the through-hole 13 is opened. Since the pole assembly 5 is provided in the through-hole 14, the space occupied by the battery can be reduced by providing the through-hole 14 on the same side as the through-hole 13 of the side wall 12.
In an alternative embodiment of the present application, the pole post assembly 5 includes a first pole post 51, a second pole post 52, a first spacer 53 and a second spacer 54;
the first pole 51 is arranged on one surface of the casing 1 close to the battery cell 4, and the first gasket 53 is arranged between the first pole 51 and the casing 1;
the second pole 52 is disposed on a surface of the casing 1 away from the battery cell 4, and the second gasket 54 is disposed between the second pole 52 and the casing 1;
the first pole post 51 is electrically connected to the second pole post 52.
Specifically, the first gasket 53 is disposed between the first pole 51 and the housing 1 to insulate the first pole 51 from the housing 1, the second gasket 54 is disposed between the second pole 52 and the housing 1 to insulate the second pole 52 from the housing 1, and the pole assembly 5 is disposed in the through hole 14, so that the first gasket 53 and the second gasket 54 can also be used to seal the pole assembly 5 and the housing 1.
It should be noted that, the shape and structure of the first pole post 51, the second pole post 52, the first spacer 53 and the second spacer 54 are not specifically limited in the present application, for example, the first pole post 51, the second pole post 52, the first spacer 53 and the second spacer 54 are all plate-shaped structures, and the plate-shaped structures are square with chamfers, wherein the first pole post 51, the second pole post 52, the first spacer 53 and the second spacer 54 are provided with through holes 7, and the rivet penetrates through the second pole post 52, the second spacer 54, the first pole post 51 and the first spacer 53 in sequence to rivet the first pole post 51 and the second pole post 52. It is understood that the first pole post 51, the second pole post 52, the first spacer 53 and the second spacer 54 may have other shapes.
In an alternative embodiment of the present application, the second pole 52 includes a base portion 521 and a pillar portion 522, the pillar portion 522 is connected to the base portion 521, the first pole 51, the first spacer 53 and the second spacer 54 are provided with through holes 7, and the pillar portion 522 sequentially passes through the through hole 7 of the second spacer 54, the through hole 14, the through hole 7 of the first spacer 53 and the through hole 7 of the first pole 51 and is riveted with the first pole 51.
Specifically, the second pole post 52 is provided with the base portion 521 and the post portion 522, the post portion 522 is inserted through the through hole 7 of the second spacer 54, the through hole 14, the through hole 7 of the first spacer 53, and the through hole 7 of the first pole post 51 in this order, and is crimped with the first pole post 51, so that the connection strength between the first pole post 51 and the second pole post 52 is enhanced, and the second pole post 52 is crimped with the first pole post 51 via the post portion 522, so that the second pole post 52 and the first pole post 51 are sufficiently connected, and the internal resistance can be reduced.
In an alternative embodiment of the present application, a distance from one surface of the glue nail 2 close to the battery cell 4 is greater than a distance from one surface of the first terminal 51 close to the battery cell 4; the distance from one surface of the glue nail 2 far away from the battery cell 4 to the battery cell 4 is less than the distance from one surface of the second pole 52 far away from the battery cell 4 to the battery cell 4.
Specifically, since the glue nail 2 does not participate in any electrochemical reaction during the operation of the battery, in this embodiment, the distance from the side of the glue nail 2 close to the battery cell 4 is set to be greater than the distance from the side of the first terminal post 51 close to the battery cell 4, that is, the thickness of the extension portion 212 of the glue nail 2 is smaller than the total thickness of the first terminal post 51 and the first spacer 53, so that the glue nail 2 does not occupy the height space inside the battery, and the energy density of the battery is not affected by the arrangement of the glue nail 2; the distance from one side of the glue nail 2 far away from the battery core 4 to the battery core 4 is smaller than the distance from one side of the glue nail 2 far away from the battery core 4 to the battery core 4, namely, the thickness of the nail cap 22 of the glue nail 2 is smaller than the total thickness of the second pole 52 and the second gasket 54, so that the glue nail 2 does not cause the external contour of the battery to become large, and the energy density of the battery is not influenced by the glue nail 2.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. An explosion-proof valve structure, comprising:
the shell (1), the shell (1) comprises a bottom wall (11) and a side wall (12) arranged around the bottom wall (11), and the shell (1) is provided with a through hole (13);
the glue nail (2) penetrates through the through hole (13) and is riveted on the shell (1).
2. Explosion-proof valve structure according to claim 1, characterized in that the surface of the housing (1) in contact with the glue pegs (2) is a frosted surface which has been frosted.
3. Explosion-proof valve construction according to claim 1 or 2, characterized in that a glue layer (8) is arranged between the housing (1) and the glue nail (2).
4. The structure of the explosion-proof valve according to claim 1, characterized in that the glue nail (2) comprises a nail column (21) and a nail cap (22), the nail column (21) is connected with the nail cap (22), the nail column (21) penetrates out of the through hole (13), and the nail cap (22) is arranged at one side of the shell (1); wherein the content of the first and second substances,
before riveting, the post (21) comprises a body portion (211);
after riveting, the nail post (21) further comprises an extension part (212), the extension part (212) is formed by extending the body part (211) transversely along the axis center, and the extension part (212) and the nail cap (22) are respectively arranged on two opposite surfaces of the shell (1).
5. Explosion-proof valve construction according to claim 4, characterized in that the thickness of the body part (211) is greater than the thickness of the housing (1) before riveting; after riveting, the thickness of the body part (211) is equal to that of the shell (1), and the diameter of the extension part (212) is larger than that of the through hole (13).
6. Explosion proof valve structure according to claim 4 or 5, characterized in that the body part (211) is a hollow structure.
7. A steel can battery, comprising:
an explosion proof valve structure as defined in any one of claims 1 to 6;
the battery cell (4) comprises a main body part (41), and a first tab (411) and a second tab (412) which are led out from the main body part (41) and have opposite polarities;
the cover plate (3) covers the shell (1) to form a sealed cavity for accommodating the battery cell (4);
in the shell (1) of the explosion-proof valve structure, the shell (1) is also provided with a through hole (14) and a liquid injection hole (15);
the pole assembly (5) is arranged in the through hole (14) and is electrically connected with the first pole lug (411);
and the conducting plate (16) is connected to the shell (1) and is electrically connected with the second pole lug (412).
8. The steel-shelled battery according to claim 7, characterized in that the pole assembly (5) comprises a first pole (51), a second pole (52), a first washer (53) and a second washer (54);
the first pole post (51) is arranged on one surface, close to the battery core (4), of the shell (1), and the first gasket (53) is arranged between the first pole post (51) and the shell (1);
the second pole column (52) is arranged on one surface of the shell (1) far away from the battery core (4), and the second gasket (54) is arranged between the second pole column (52) and the shell (1);
wherein the first pole post (51) is electrically connected with the second pole post (52).
9. The steel-shell battery according to claim 8, wherein the second pole (52) comprises a base portion (521) and a column portion (522), the column portion (522) is connected to the base portion (521), the first pole (51), the first spacer (53) and the second spacer (54) are provided with through holes (7), and the column portion (522) sequentially passes through the through holes (7) of the second spacer (54), the through hole (14), the through holes (7) of the first spacer (53) and the through holes (7) of the first pole (51) and is riveted with the first pole (51).
10. The steel-shell battery according to claim 8, characterized in that in the glue nail (2) of the explosion-proof valve structure, the distance from the surface of the glue nail (2) close to the battery core (4) is greater than the distance from the surface of the first pole post (51) close to the battery core (4); the distance from one surface, far away from the battery core (4), of the glue nail (2) to the battery core (4) is smaller than the distance from one surface, far away from the battery core (4), of the second pole column (52) to the battery core (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221079482.0U CN218334181U (en) | 2022-05-07 | 2022-05-07 | Steel shell battery and explosion-proof valve structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221079482.0U CN218334181U (en) | 2022-05-07 | 2022-05-07 | Steel shell battery and explosion-proof valve structure thereof |
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| Publication Number | Publication Date |
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| CN218334181U true CN218334181U (en) | 2023-01-17 |
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| CN202221079482.0U Active CN218334181U (en) | 2022-05-07 | 2022-05-07 | Steel shell battery and explosion-proof valve structure thereof |
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| Country | Link |
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| CN (1) | CN218334181U (en) |
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2022
- 2022-05-07 CN CN202221079482.0U patent/CN218334181U/en active Active
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