WO2022206951A1 - 电池盖板、电池以及电池的制备方法 - Google Patents

电池盖板、电池以及电池的制备方法 Download PDF

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Publication number
WO2022206951A1
WO2022206951A1 PCT/CN2022/084799 CN2022084799W WO2022206951A1 WO 2022206951 A1 WO2022206951 A1 WO 2022206951A1 CN 2022084799 W CN2022084799 W CN 2022084799W WO 2022206951 A1 WO2022206951 A1 WO 2022206951A1
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WO
WIPO (PCT)
Prior art keywords
base
hole
battery
cover plate
cap
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Application number
PCT/CN2022/084799
Other languages
English (en)
French (fr)
Inventor
杨昆仑
李正冬
陈志勇
Original Assignee
广东微电新能源有限公司
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Publication date
Application filed by 广东微电新能源有限公司 filed Critical 广东微电新能源有限公司
Publication of WO2022206951A1 publication Critical patent/WO2022206951A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure relates to the technical field of batteries, and in particular, to a battery cover plate, a battery having the battery cover plate, and a method for preparing the battery.
  • Lithium-ion battery is a large-capacity, high-power battery, which is mainly used in small devices, such as lithium-ion batteries can be applied to mobile phones.
  • Lithium-ion batteries are generally composed of a battery cover plate assembly, a battery tank, an electrolyte, and a battery core wound by positive and negative electrode sheets and separator paper.
  • the battery cover is provided with an opening, and the opening is provided with a cap.
  • the cap is used as an electrode of the battery to draw out the current.
  • an additional through hole needs to be provided on the battery cover as a liquid injection hole. Therefore, the battery assembly process in the prior art is cumbersome and the battery The strength of the cover plate is low.
  • An object of the present disclosure is to provide a battery cover plate, a battery having the battery cover plate, and a preparation method of the battery.
  • a battery cover includes:
  • cover plate wherein the cover plate penetrates along the thickness direction to form a first through hole
  • a base at least a part of the base is located in the first through hole, an insulating member is arranged between the base and the cover plate; the base passes through the base along the thickness direction to form a second through hole;
  • a cap at least a part of the cap is located in the second through hole and is detachably connected to the base, and when the cap is separated from the base, the second through hole is used as a liquid injection hole.
  • a connecting portion is provided between the base and the cap.
  • an inner thread is formed on the inner wall of the second through hole
  • an outer thread is formed on at least a part of the outer wall of the cap, and the base and the cap are threadedly connected.
  • the cap is embedded in the second through hole, and a sealing film is provided between the cap and the base.
  • the insulator is provided on the inner peripheral surface of the first through hole, and at least one of the two ends of the insulator extends outward along the radial direction of the first through hole and covers the surface of the cover.
  • the insulating member further includes an insulating support arm;
  • An accommodating groove is formed along the thickness direction of the cover plate, and the insulating support arm is embedded in the accommodating groove.
  • the base includes a first base and a second base connected to the first base;
  • the first base is connected to the cover plate, and the second base penetrates the first through hole.
  • a first connecting surface is formed on a side of the first base close to the second base
  • a second connecting surface is formed on a side of the second base close to the first base
  • the The first connecting surface and the second connecting surface are oppositely arranged and connected
  • the size of the first connection surface is larger than the size of the second connection surface, and the first connection surface is arranged above the tab for electrically connecting with the tab. connect.
  • the insulating member is disposed on the inner peripheral surface of the first through hole, and the upper end of the insulating member extends outward along the radial direction of the first through hole and covers the outer surface of the cover plate.
  • the cover plate, the base and the insulating member are integrally formed.
  • a battery includes: a casing and the battery cover described in the first aspect;
  • An opening is formed on one side of the casing, the battery cover plate covers the opening, and the cover plate is welded with the casing.
  • the battery cover when the battery cover covers the opening, at least a part of the base extends into the casing.
  • a method for manufacturing a battery includes the steps:
  • a casing is provided, and the casing is provided with an electric core;
  • a battery cover is provided, the cover is welded with the casing, and the base is isolated from the cover by an insulating member;
  • the electrolyte is injected into the casing through the second through hole on the base;
  • a cap is arranged in the second through hole to seal the battery.
  • the method before the step of injecting electrolyte into the casing through the second through hole on the base, the method further includes:
  • the positive ear of the battery cell is welded to the base, and the negative electrode ear of the battery core is welded to the cover plate or the casing.
  • the method before the step of injecting electrolyte into the casing through the second through hole on the base, the method further includes:
  • the method further includes:
  • a battery cover plate provided by the present disclosure includes a cover plate, an insulating member, a base and a cap.
  • the base and the cap are detachably connected, and the electrolyte is injected through the second upper through hole of the base when the cap and the base are not assembled.
  • the battery cover plate of this example does not need to separately open through holes on the cover plate as liquid injection holes, which improves the strength of the battery cover plate.
  • FIG. 1 is a schematic diagram of an internal structure of a battery according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic structural diagram of the combination of the cover plate and the casing of the battery of the present disclosure.
  • FIG. 3 is a schematic structural diagram of the combination of the base and the cover plate of the battery of the present disclosure.
  • FIG. 4 is a schematic structural diagram of the battery shown in FIG. 1 .
  • FIG. 5 is a schematic diagram showing the internal structure of a battery according to still another embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of the battery shown in FIG. 5 .
  • FIG. 7 is a schematic structural diagram of a battery cover plate of the battery shown in FIG. 5 .
  • FIG. 8 is a schematic diagram showing the internal structure of a battery according to still another embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of the battery shown in FIG. 8 .
  • Battery cover 11. Cover; 111, First through hole; 12, Metal terminal; 121, Base; 122, Cap; 123, Second through hole; 124, Sealing film; 13, Insulator; 131 , insulating arm; 2, shell; 3, cell; 31, tab; 1211, first base; 1212, second base.
  • the battery cover 1 includes: a cover 11 , a base 121 , a cap 122 and an insulating member 13 .
  • a first through hole 111 is formed through the cover plate 11 along its thickness direction. At least a part of the base 121 is located in the first through hole 111 . An insulating member 13 is disposed between the base 121 and the cover 11 . A second through hole 123 is formed through the base 121 along its thickness direction. At least a part of the cap 122 is located in the second through hole 123 and is detachably connected to the base 121 . When the cap 122 is separated from the base 121, the second through hole 123 is used as a liquid injection hole.
  • the cover plate 11 is provided with a first through hole 111 , and the first through hole 111 penetrates along the thickness direction of the cover plate 11 .
  • At least a part of the base 121 is located in the first through hole 111 , that is to say, the base 121 may be entirely disposed in the first through hole 111 , or may be partially disposed in the first through hole 111 .
  • an insulating member 13 is provided between the base 121 and the cover 11. The insulating member 13 isolates the base 121 and the cover 11, and the insulating member 13 avoids the The seat 121 is in direct contact with the cover plate 11 .
  • the base 121 and the cover plate 11 are isolated by the insulating member 13 , so as to avoid the short circuit of the battery caused by the contact between the base 121 and the cover plate 11 .
  • the material of the cover plate 11 is a metal material.
  • the material of the cover plate 11 can be selected from a steel material or an aluminum material.
  • a second through hole 123 is formed on the base 121 , and the second through hole 123 penetrates along the thickness direction of the base 121 . At least a part of the cover cap 122 is located in the second through hole 123 , that is, the cover cap 122 may be completely located in the second through hole 123 , or may be partially located in the second through hole 123 .
  • the cap 122 and the base 121 are detachably connected, so the cap 122 and the base 121 can be in a mutually assembled state or in a separated state.
  • the electrolyte is injected through the second through hole 123 .
  • the second through hole 123 serves as a liquid injection hole.
  • the cap 122 is not covered on the second through hole 123 , and electrolyte is injected into the battery through the second through hole 123 .
  • the cap 122 is assembled with the base 121 through the second through hole 123 to seal the battery. to seal the battery.
  • the cap 122 and the base 121 When the cap 122 and the base 121 are in an assembled state, the cap 122 and the base 121 constitute the metal terminal 12 .
  • the metal terminals 12 may all be located in the first through holes 111 , or may be partially located in the first through holes 111 .
  • the metal terminal 12 serves as the lead-out terminal of the battery electrode.
  • two first through holes 111 may be formed on the cover plate 11, and the two first through holes 111 are arranged at intervals; the battery cover plate includes two metal terminals 12, and the two metal terminals 12 are respectively is located in the first through hole 111 .
  • the battery cover plate 1 can be used for batteries whose positive and negative electrodes are located on the same side.
  • the material of the cap 122 and the material of the base 121 may both be made of metal, or one of them may be made of metal, and the other may be made of rubber.
  • the battery cover plate 1 includes the cover plate 11 , the insulating member 13 , the base 121 and the cap 122 .
  • the base 121 and the cap 122 are detachably connected, and the electrolyte is injected through the second through hole 123 on the base 121 when the cap 122 and the base 121 are not assembled.
  • the battery cover plate 1 of this example does not need to be provided with a separate injection hole, and the base 121 and the cap 122 as the electrode lead-out end are connected in a detachable connection manner.
  • the electrolyte is injected through the second through holes 123 on the base 121 .
  • the battery cover plate 1 provided by the embodiment of the present disclosure has a simple structure and is easy to assemble.
  • the battery cover plate 1 of this example does not need to separately open through holes on the cover plate 11 as liquid injection holes, which improves the strength of the battery cover plate 1 .
  • a connecting portion is provided between the base 121 and the cap 122 .
  • the base 121 and the cap 122 are detachably connected through the connecting portion.
  • the cap 122 can be assembled with the base 121 through the connecting portion to form a metal terminal 12, and the metal terminal 12 can be used as a lead-out end of the battery electrode.
  • the cap 122 can be detached from the base 121 through the connecting portion, and the electrolyte is injected into the battery through the second through hole 123 .
  • an inner thread is formed on the inner wall of the second through hole 123
  • an outer thread is formed on at least a part of the outer wall of the cap 122 , and the base 121 and the cap 122 are screwed together.
  • the base 121 and the cap 122 are detachably connected through screw connection. Further, in order to strengthen the sealing between the base 121 and the cap 122 , sealant is applied on the external thread formed on the outer wall of the base 121 , and/or the internal thread formed on the inner wall of the second through hole 123 Apply sealant.
  • the second through hole 123 is a threaded hole, and the base 121 and the cap 122 are injected with electrolyte through the threaded hole before the assembly is completed. After the electrolyte is injected through the threaded hole, the cap 122 is threadedly connected to the base 121 .
  • the connecting portion includes an internal thread and an external thread.
  • the connecting portion may also be a magnetic component.
  • a first magnetic component is provided on the inner wall of the second through hole 123
  • a second magnetic component is provided on the outer wall of the cover cap 122, and the base 121 and the cover cap 122 are detachable through the first magnetic component and the second magnetic component. connect.
  • the cap 122 is embedded in the second through hole 123 , and a sealing film 124 is disposed between the cap 122 and the base 121 .
  • the second through hole 123 is a stepped hole
  • the stepped hole includes a first hole and a second hole communicating with the first hole
  • the radial dimension of the first hole is larger than the radial dimension of the second hole size
  • the cap is secured in the first hole.
  • the second through hole 123 is sealed through the cap 122 by means of heat sealing.
  • a sealing film 124 can be used for heat sealing at the step, and the second through hole 123 is blocked by the cap 122 .
  • the base 121 and the cap 122 are connected through an interference fit.
  • a sealing film is provided on the inner peripheral surface of the second through hole 123 , the cap 122 is embedded in the second through hole 123 , and the sealing film 124 is located between the cap 122 and the base 121 at this time.
  • a sealing film is provided at the connection between the cap 122 and the base 121 , which improves the sealing performance of the cap 122 and the base 121 .
  • a sealing film is provided at the connection between the cap 122 and the base 121 to improve the connection strength of the cap 122 and the base 121 .
  • the sealing film 124 is a PP composite film. At least the contact portion of the base 121 and the cap 122 is sealed with a PP composite film.
  • the base 121 and the cap 122 are detachably sealed. When the base 121 and the cap 122 are in a separated state, the electrolyte is injected through the second through hole 123 . When the base 121 and the cap 122 are in an assembled state, the base 121 and the cap 122 are sealedly connected.
  • the detachable connection method between the base 121 and the cap includes, but is not limited to, screw connection, thermocompression connection, or interference fit connection.
  • the insulating member 13 is provided on the inner peripheral surface of the first through hole 111 , and at least one of the two ends of the insulating member 13 is along the The first through hole 111 extends radially outward and covers a surface of the cover plate 11 .
  • the insulating member 13 is disposed on the inner peripheral surface of the first through hole 111 , and the insulating member 13 includes opposite ends.
  • the opposite ends include an upper end and a lower end. At least one of the upper end and the lower end extends outward along the radial direction of the first through hole 111 and covers a surface of the cover plate.
  • the insulating member 13 is provided on the inner peripheral surface of the first through hole 111 , and both ends of the insulating member 13 extend outward along the radial direction of the first through hole 111 respectively and cover the cover The upper and lower surfaces of the board 11 .
  • the base 121 includes a first base and a second base connected to the first base.
  • the first base is a cylindrical structure.
  • the second base is located at the lower end of the first base and extends out of the first through hole 111 .
  • the second base extends outward along the radial direction of the first through hole 111 to cover the outer surface of the insulating member 13 and does not exceed the edge of the insulating member 13 .
  • the first base and the second base are integrally formed to form the base 121 .
  • the cap 122 includes a first cap body and a second cap body connected with the first cap body.
  • the first cap body is a cylindrical structure, and the first cap body is connected to the base 121 through the second through hole 123 .
  • the second cap body is located on the upper side of the first cap body and extends out of the first through hole 111 .
  • the second cap body extends outward along the radial direction of the first through hole 111 to cover the outer surface of the insulating member 13 and does not exceed the edge of the insulating member 13 .
  • the first cap body and the second cap body are integrally formed to form the cap 122 .
  • the insulating member 13 is provided on the inner peripheral surface of the first through hole 111 , and the upper end of the insulating member 13 extends outward along the radial direction of the first through hole 111 and Cover the upper surface of the cover plate 11 .
  • the base 121 includes a first base and a second base connected to the first base.
  • the first base is a cylindrical structure, the lower end of the first base protrudes out of the first through hole 111 by a predetermined distance, and the lower end of the first base is used for connecting with the tab. Since the lower end of the first base extends out of the first through hole 111 , and the lower end of the first base extending out of the first through hole 111 is connected to the tab, there is a predetermined gap between the tab drawn from the cell and the cover plate 11 . The predetermined distance between the two can prevent the tabs from contacting the cover plate 11 . Therefore, the lower surface of the cover plate 11 in this example is not covered with an insulating member.
  • the second base of the base 121 is located at the upper end of the first base, the second base extends along the radial direction of the first through hole 111 and covers a part of the outer surface of the insulating member 13 and does not exceed the edge of the insulating member 13 .
  • the first base and the second base of the base 121 are both provided with through holes, wherein the through hole opened on the first base communicates with the through hole opened on the second base to form a second through hole 123 .
  • the second through holes 123 are stepped holes.
  • the cap 122 is covered on the stepped hole, wherein the upper surface of the cap 122 is flush with the upper surface of the second base.
  • the cap 122 is a columnar structure.
  • the insulating member 13 further includes an insulating support arm 131 , and the cover plate 11 is along the thickness direction of the cover plate 11 .
  • An accommodating groove is formed, and the insulating support arm 131 is embedded in the accommodating groove.
  • an insulating support arm 131 is provided on the insulating member 13, and the insulating support arm 131 is connected with the cover plate 11, which improves the connection area between the insulating member 13 and the cover plate 11, thereby enhancing the connection strength between the insulating member 13 and the cover plate 11. .
  • the disposing direction of the insulating support arm 131 is perpendicular to the extending direction of the insulating member 13 .
  • the base 121 includes a first base 1211 and a second base 1212 connected to the first base 1211 .
  • the first base 1211 is connected to the cover plate 11
  • the second base 1212 penetrates through the first through hole 111 .
  • the radial dimension of the first base 1211 is larger than the radial dimension of the second base 1212
  • the first base 1211 can be connected to the upper surface of the cover plate 11
  • the first base 1211 and the upper surface of the cover plate 11 are An insulating member 13 is arranged between them. This example improves the connection reliability between the base 121 and the cover 11 .
  • a first connecting surface is formed on the side of the first base 1211 close to the second base 1212 , and the second base 1212 is close to the first base 1212 .
  • a second connecting surface is formed on one side of the base 1211 , and the first connecting surface and the second connecting surface are oppositely disposed and connected.
  • the size of the first connection surface is larger than the size of the second connection surface, and the first connection surface is disposed above the pole tab 31 for connecting with the pole.
  • the ears 31 are electrically connected.
  • the first base 1211 and the second base 1212 are formed by integral molding.
  • the first base 1211 and the second base 1212 respectively define through holes, and the through holes opened on the first base 1211 and the through holes opened on the second base 1212 communicate with each other to form a second through hole 123 .
  • the first base 1211 has a T-shaped structure, the lower end of the first base 1211 protrudes out of the first through hole 111 , and the lower end of the first base 1211 protrudes by a predetermined distance.
  • the second base 1212 has a trapezoidal structure, wherein the length of the upper base of the second base 1212 is greater than the length of the lower base of the second base 1212 .
  • the first connection surface formed at the lower end of the first base 1211 is connected to the second connection surface formed at the upper bottom of the second base 1212 . Since the size of the first connecting surface is larger than the size of the second connecting surface along the radial direction of the first through hole 111 , after the first base 1211 and the second base 1212 are connected, the In the radial direction of the through hole 111 , the first connection surface is formed with an extension surface relative to the second connection surface.
  • the battery When the battery cover plate 1 is applied to a battery, the battery includes a casing 2 and a battery cell 3 disposed inside the casing 2 .
  • the battery core 3 leads out the tab 31 , and the extension surface is located above the tab 31 and is electrically connected to the tab 31 , for example, the extension surface is welded with the tab 31 . Because the extension surface is pressed above the tabs 31, the displacement of the tabs 31 along the height direction of the battery is restricted, the tabs 31 are prevented from contacting with the cover plate 11, and the short-circuit phenomenon of the battery is prevented.
  • the insulating member 13 is provided on the inner peripheral surface of the first through hole 111 , and the upper end of the insulating member 13 is along the length of the first through hole 111 . It extends radially outward and covers the outer surface of the cover plate 11 .
  • the first connecting surface formed at the lower end of the first base 1211 of the base 121 can be pressed on the tab 31, which limits the displacement of the tab 31 along the height direction of the battery and avoids the tab 31 is in contact with the cover plate 11, thereby preventing the short circuit of the battery.
  • the insulating member 13 is provided on the inner peripheral surface of the first through hole 111 , and the insulating member 13 includes an upper end and a lower end that are arranged opposite to each other, and only the upper end of the insulating member 13 needs to be along the radial direction of the first through hole 111 . It extends and covers the outer surface of the cover plate, so as to avoid the battery short circuit caused by the direct contact between the base 121 and the cover plate 11 .
  • the cover plate 11 , the base 121 and the insulating member 13 are integrally formed.
  • the cover plate 11 , the base 121 and the insulating member 13 are integrally formed by injection molding.
  • the cover plate 11, the base 121 and the insulating member 13 are integral structural members.
  • the assembly process of the battery cover plate 1 in this example is simple and convenient for users to operate.
  • the integrated structure composed of the cover 11 , the base 121 and the insulating member 13 is first connected to the battery case 2 .
  • the electrolyte is injected through the second through holes 123 formed on the base 121 .
  • the cap 122 is set on the second through hole 123 to seal the battery.
  • the material of the base 121 is the same as the material of the cap 122 .
  • both the base 121 and the cap 122 can be made of aluminum.
  • the material of the base 121 is the same as the material of the cap 122, and the base 121 and the cap 122 can be used as the same electrode to lead out the battery current.
  • the base 121 and the cap 122 can both act as positive electrodes to draw battery current.
  • the battery cover plate 1 is applied to the battery, and the positive electrode ear of the battery cell 3 is welded to the base 121 or the positive electrode ear of the battery cell 3 is welded to the cap 122 .
  • a battery is provided. Referring to FIGS. 1-9 , the housing 2 and the battery cover 1 described in the first aspect are included. An opening is formed on one side of the casing 2 , the battery cover plate 1 covers the opening, and the cover plate 11 is welded to the casing 2 .
  • the housing 2 includes side walls, the side walls are enclosed in the circumferential direction of the housing 2 , and the side walls are enclosed in a cylindrical shape or in a cubic structure. At least one end of the casing 2 forms an opening, and the battery cover 1 closes the opening.
  • the housing 2 includes a side wall and a bottom wall, wherein the side wall and the bottom wall are integrally formed.
  • the end of the casing 2 opposite to the bottom wall forms an opening, and the battery cover plate 1 closes the opening.
  • the cover plate 11 and the casing 2 can be connected by laser welding or resistance welding.
  • the material of the cover plate 11 is the same as the material of the casing 2 .
  • the cover plate 11 and the case 2 are made of steel, the cover plate 11 and the case 2 can be used as the lead end of the same electrode of the battery, and the base 121 and the cap 122 can be used as the lead end of the other electrode of the battery.
  • the battery cell 3 includes a positive electrode lug and a negative electrode lug, wherein the positive electrode lug is electrically connected to the base 121 or the cap 122, and the negative electrode lug is electrically connected to the shell cover 11 or the casing 2 to ensure normal use of the battery.
  • the base 121 includes a first base 1211 and a second base 1212 , wherein the second base 1212 extends to the inside of the casing 2 , which further improves the sealing between the battery cover 1 and the casing 2 .
  • a method for preparing a battery includes the following steps:
  • a casing 2 is provided, and the battery core 3 is arranged in the casing 2;
  • the battery cover 1 is provided, the cover 11 is welded with the casing 2 and the base 121 and the cover 11 are isolated by the insulating member 13;
  • the electrolyte is injected into the casing 2 through the second through hole 123 on the base 121;
  • the cap 122 is disposed in the second through hole 123 to seal the battery.
  • a casing 2 is provided, and the material of the casing 2 can be made of steel.
  • the housing 2 is formed with an accommodating cavity, and the battery cells 3 are located in the accommodating cavity.
  • a first through hole 111 is formed through the cover plate 11 along its thickness direction, and the base 121 is located in the first through hole 111 ;
  • the cover plate 11 , the insulating member 13 and the base 121 are integrally formed to form an integral structural member.
  • the one-piece structure is covered on the casing 2 .
  • the electrolyte is injected into the casing 2 through the second through holes 123 formed on the base 121 .
  • the cap 122 is sealedly connected to the base 121 through the second through hole 123 .
  • the battery cover plate 1 of this example does not need to separately open through holes on the cover plate 11 as liquid injection holes, which improves the strength of the battery cover plate 1 .
  • the cover plate 11 and the base 121 are detachably connected, so that the electrolyte solution can be replenished into the casing 2 easily.
  • the cover plate 11 and the casing 2 are welded first, and then the electrolyte is injected into the casing 2 through the second through hole 123 formed on the base 121 .
  • the electrolyte solution is injected into the casing first, and then the battery cover plate and the casing are welded.
  • this example changes the assembly sequence of the battery, so as to avoid the high temperature generated during the welding of the casing and the cover plate from affecting the properties of the electrolyte injected first.
  • the method before the step of injecting electrolyte into the casing 2 through the second through hole 123 on the base 121, the method further includes:
  • the positive tab of the battery cell 3 is welded to the base 121 , and the negative electrode tab of the battery cell 3 is welded to the cover plate 11 or the casing 2 .
  • the battery cell 3 includes a positive electrode lug and a negative electrode lug.
  • the base 121 serves as the lead-out end of the positive electrode
  • the cover plate 11 or the case 2 serves as the lead-out end of the negative electrode.
  • the positive terminal of the battery cell 3 can be welded to the base 121
  • the negative terminal of the battery core 3 can be welded to the cover plate 11 or the casing 2 , and then the second pass through the base 121
  • the hole 123 injects the electrolyte into the casing 2 .
  • the method before the step of injecting electrolyte into the casing 2 through the second through hole 123 on the base 121, the method further includes:
  • the method further includes:
  • the base 121 and the cap 122 draw current as the same pole of the battery.
  • the cap 122 is welded to the positive lug of the battery cell 3 .
  • the battery cell 3 includes a positive electrode lug and a negative electrode lug.
  • the cap 122 serves as the lead-out end of the positive electrode
  • the cover plate 11 or the case 2 serves as the lead-out end of the negative electrode.
  • the negative terminal of the battery cell 3 is welded to the cover plate 11 or the casing 2 .
  • the positive tab of the battery cell 3 is welded to the cap 122 by a laser disposed outside the casing 2 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
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Abstract

提供了一种电池以及电池的制备方法。电池盖板(1)包括：盖板(11)，盖板(11)沿其厚度方向贯通形成第一通孔(111)；基座(121)，基座(121)的至少一部分位于第一通孔(111)内，基座(121)与盖板(11)之间设置有绝缘件(13)；基座(121)沿其厚度方向贯通形成第二通孔(123)；盖帽(122)，盖帽(122)的至少一部分位于第二通孔(123)内并与基座(121)可拆卸连接，在盖帽(122)与基座(121)处于分离状态，第二通孔(123)作为注液孔。

Description

电池盖板、电池以及电池的制备方法
本申请要求于2021年04月02日提交中国专利局，申请号为202110362208.8，申请名称为“电池盖板、电池以及电池的制备方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及电池技术领域，具体地，涉及一种电池盖板、具有该电池盖板的电池以及电池的制备方法。
背景技术
锂离子电池是一种大容量、高功率的电池，其主要应用于小型设备上，例如锂离子电池可以应用到移动电话上。锂离子电池一般是由电池盖板组件、电池罐、电解液以及由正、负极片和隔膜纸卷绕成的电池卷芯组成。
电池盖板上设置有开口，开口处设置有盖帽，盖帽作为电池的一个电极将电流引出，同时电池盖板上需要额外设置通孔作为注液孔，因此现有技术的电池装配过程繁琐，电池盖板强度较低。
发明内容
本公开的一个目的是提供一种电池盖板、具有该电池盖板的电池以及电池的制备方法。
根据本公开的第一方面，提供一种电池盖板。所述电池盖板包括：
盖板，所述盖板沿其厚度方向贯通形成第一通孔；
基座，所述基座的至少一部分位于所述第一通孔内，所述基座与所述盖板之间设置有绝缘件；所述基座沿其厚度方向贯通形成第二通孔；
盖帽，所述盖帽的至少一部分位于所述第二通孔内并与所述基座可拆卸连接，在所述盖帽与所述基座处于分离的状态下，所述第二通孔作为注 液孔。
可选地，所述基座与所述盖帽之间设置有连接部。
可选地，所述第二通孔的内壁上形成有内螺纹，至少一部分所述盖帽的外壁上形成有外螺纹，所述基座和所述盖帽螺纹连接。
可选地，所述盖帽嵌设在所述第二通孔内，所述盖帽与所述基座之间设置有密封膜。
可选地，所述绝缘件设于所述第一通孔的内周面上，所述绝缘件的两端中的至少一端沿所述第一通孔的径向向外延伸并覆盖所述盖板的表面。
可选地，沿所述第一通孔的轴向方向，所述绝缘件还包括绝缘支臂；
所述盖板沿其厚度方向上形成有容置槽，所述绝缘支臂嵌设在所述容置槽内。
可选地，所述基座包括第一基座和与所述第一基座连接的第二基座；
所述第一基座与所述盖板连接，所述第二基座贯穿所述第一通孔。
可选地，所述第一基座靠近所述第二基座一侧形成有第一连接面，所述第二基座靠近所述第一基座一侧形成有第二连接面，所述第一连接面和所述第二连接面相对设置并连接；
沿所述第一通孔的径向方向，所述第一连接面的尺寸大于所述第二连接面的尺寸，所述第一连接面设置在极耳的上方用于与所述极耳电连接。
可选地，所述绝缘件设于所述第一通孔的内周面上，所述绝缘件上端沿所述第一通孔的径向向外延伸并覆盖所述盖板的外表面。
可选地，所述盖板、基座和所述绝缘件为一体成型件。
根据本公开第二方面，提供一种电池。所述电池包括:壳体和第一方面所述的电池盖板；
所述壳体一侧形成开口，所述电池盖板覆盖所述开口，所述盖板与所述壳体焊接。
可选地，在所述电池盖板覆盖所述开口的状态下，所述基座的至少一部分延伸至所述壳体内部。
根据本公开第三方面，提供一种电池的制备方法。所述方法包括步骤：
提供壳体，所述壳体内设置有电芯；
提供电池盖板，将盖板与所述壳体焊接并且基座与所述盖板通过绝缘件隔离；
通过所述基座上的第二通孔将电解液注入所述壳体内；
将盖帽设置于所述第二通孔内密封所述电池。
可选地，在通过所述基座上的第二通孔将电解液注入所述壳体内的步骤之前，还包括：
将电芯的正极耳与所述基座焊接，将电芯的负极耳与所述盖板或者所述壳体焊接。
可选地，在通过所述基座上的第二通孔将电解液注入所述壳体内的步骤之前，还包括：
将电芯的负极耳与所述盖板或者所述壳体焊接；
在将盖帽设置于所述第二通孔内密封所述电池的步骤之后，还包括：
将电芯的正极耳与所述盖帽焊接。
本公开的有益效果：本公开提供的一种电池盖板包括盖板、绝缘件、基座和盖帽。其中基座与盖帽可拆卸连接，在盖帽与基座未实现装配时，通过基座的上第二通孔注入电解液。相对于现有技术，本例子电池盖板不需要单独在盖板上开设通孔以作为注液孔，提高了电池盖板的强度。
通过以下参照附图对本公开的示例性实施例的详细描述，本公开的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本公开的实施例，并且连同其说明一起用于解释本公开的原理。
图1所示为本公开一实施例的电池的内部结构示意图。
图2所示为本公开电池的盖板和壳体组合的结构示意图。
图3所示为本公开电池的基座与盖板组合的结构示意图。
图4为图1所示电池的结构示意图。
图5所示为本公开又一实施例的电池的内部结构示意图。
图6为图5所示电池的结构示意图。
图7为图5所示电池的电池盖板结构示意图。
图8所示为本公开又一实施例的电池的内部结构示意图。
图9为图8所示电池的结构示意图。
附图标记说明：
1、电池盖板；11、盖板；111、第一通孔；12、金属端子；121、基座；122、盖帽；123、第二通孔；124、密封膜；13、绝缘件；131、绝缘支臂；2、壳体；3、电芯；31、极耳；1211、第一基座；1212、第二基座。
具体实施方式
现在将参照附图来详细描述本公开的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本公开的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
根据本公开的一个实施例，提供一种电池盖板。参照图1-图9所示，所述电池盖板1包括：盖板11，基座121，盖帽122和绝缘件13。
所述盖板11沿其厚度方向贯通形成第一通孔111。所述基座121的至少一部分位于所述第一通孔111内。所述基座121与所述盖板11之间设置有绝缘件13。所述基座121沿其厚度方向贯通形成第二通孔123。所述盖帽122的至少一部分位于所述第二通孔123内并与所述基座121可拆卸连接。在所述盖帽122与所述基座121处于分离状态，所述第二通孔123作 为注液孔。
具体地，参照图2所示，盖板11上设有第一通孔111，第一通孔111沿盖板11的厚度方向贯通。基座121的至少一部分位于所述第一通孔111内，也就是说，基座121可以全部设于第一通孔111内，也可以部分设于第一通孔111内。在基座121的至少一部分位于第一通孔111内的情况下，基座121与盖板11之间设置绝缘件13，绝缘件13以隔绝基座121和盖板11，绝缘件13避免基座121和盖板11直接接触。在电池盖板1应用到电池中，基座121和盖板11通过绝缘件13隔离，避免了基座121和盖板11接触造成电池短路。在一个实施例中，盖板11的材质为金属材质。例如盖板11的材质可以选用钢材料或者铝制材料等。
参照图3所示，基座121上形成有第二通孔123，第二通孔123沿基座121的厚度方向贯通。盖帽122的至少一部分位于第二通孔123内，也就是说，盖帽122可以全部位于第二通孔123内，也可以部分位于第二通孔123内。
盖帽122与基座121可拆卸连接，因此盖帽122与基座121可以处于相互装配状态，也可以处于分离状态。
在盖帽122和基座121处于分离状态，通过第二通孔123注入电解液。此时第二通孔123作为注液孔。例如电池盖板1应用到电池中，在盖帽122还没有盖设在第二通孔123上，通过第二通孔123向电池中注入电解液。通过第二通孔123向电池注入电解液后，将盖帽122通过第二通孔123与基座121进行装配实现对电池密封，此时第二通孔123作为安装盖帽122的安装孔，盖帽122以对电池进行密封。
在盖帽122和基座121处于装配状态，盖帽122和基座121构成金属端子12。金属端子12可以全部位于第一通孔111内，或者可以部分位于第一通孔111内。金属端子12作为电池电极的引出端。
在一个可选的实施例中，可以在盖板11上形成两个第一通孔111，两个第一通孔111间隔设置；电池盖板包括两个金属端子12，两个金属端子12分别位于第一通孔111内。此时电池盖板1可以用于正负极位于同一侧的电池。在一个实施例中，盖帽122材质和基座121的材质可以均选用金 属材质，或者其中一个选用金属材质，另外一个选用橡胶材质。
由此，根据本公开实施例的电池盖板1包括盖板11、绝缘件13、基座121和盖帽122。其中基座121与盖帽122可拆卸连接，在盖帽122与基座121未实现装配时，通过基座121上的第二通孔123注入电解液。相对于现有技术，本例子电池盖板1不需要单独设置注液孔，将作为电极引出端的基座121和盖帽122采用可拆卸连接方式连接，在盖帽122与基座121未实现装配时，通过基座121上的第二通孔123注入电解液。本公开实施例提供的电池盖板1结构简单，便于装配。本例子电池盖板1不需要单独在盖板11上开设通孔以作为注液孔，提高了电池盖板1的强度。
在一个可选的实施例，所述基座121与所述盖帽122之间设置有连接部。
例如基座121与盖帽122通过连接部实现可拆卸连接。在一个例子中，盖帽122通过连接部可以与基座121装配在一起组成一个金属端子12，金属端子12能够作为电池电极的一个引出端。例如盖帽122通过连接部可以从基座121上拆卸下来，通过第二通孔123向电池内注入电解液。
在一个可选的实施例，参照图1和图5所示，所述第二通孔123的内壁上形成有内螺纹，至少一部分所述盖帽122的外壁上形成有外螺纹，所述基座121和所述盖帽122螺纹连接。
在本实施例中，基座121和盖帽122通过螺纹连接实现可拆卸连接。进一步地，为了加强基座121和盖帽122之间的密封性，在基座121的外壁上形成的外螺纹上涂覆密封胶，和/或在第二通孔123的内壁上形成的内螺纹上涂覆密封胶。
具体地，在本实施例中第二通孔123为螺纹孔，基座121和盖帽122在还没有实现装配之前，通过螺纹孔注入电解液。通过螺纹孔注入电解液之后，盖帽122与基座121螺纹连接。在本例子中，连接部包括内螺纹和外螺纹。
在一个可选的实施例，所述连接部还可以是磁性部件。例如在第二通孔123的内壁上设置有第一磁性部件，在盖帽122的外壁上设置有第二磁性部件，通过第一磁性部件和第二磁性部件实现基座121与盖帽122的可 拆卸连接。
在一个可选的实施例中，参照图8所示，所述盖帽122嵌设在所述第二通孔123内，所述盖帽122与所述基座121之间设置有密封膜124。
在一个实施例中，第二通孔123为阶梯孔，所述阶梯孔包括第一孔和与所述第一孔连通的第二孔，第一孔的径向尺寸大于第二孔的径向尺寸，盖帽固定在第一孔内。具体地，采用热封的方式通过盖帽122密封第二通孔123。例如在台阶处可以采用密封膜124热封，通过盖帽122堵住第二通孔123。
在另外一个实施例中，基座121和盖帽122通过过盈配合实现连接。具体地，在第二通孔123的内周面上设置有密封膜，盖帽122嵌入第二通孔123内，此时密封膜124位于盖帽122和基座121之间。其中在盖帽122和基座121的连接处设置密封膜，提高了盖帽122和基座121的密封性。另一方面，在盖帽122和基座121的连接处设置密封膜，提高了盖帽122和基座121的连接强度。
在一个具体的实施例中，密封膜124为PP复合膜。至少在基座121和盖帽122的接触部分采用PP复合膜进行密封。
基座121和盖帽122采用可拆卸方式实现密封。在基座121和盖帽122处于分离状态，通过第二通孔123注入电解液。在基座121和盖帽122处于装配状态，基座121和盖帽122密封连接。
需要说明的是，基座121和盖帽可拆卸连接方式包括不限于是通过螺纹连接、热压连接或者通过过盈配合连接。
可选地，参照图1、图5和图8所示，所述绝缘件13设于所述第一通孔111的内周面上，所述绝缘件13的两端中的至少一端沿所述第一通孔111的径向向外延伸并覆盖所述盖板11的一表面。
在一个例子中，绝缘件13设于第一通孔111的内周面上，绝缘件13包括相对设置的两端。相对设置的两端包括上端和下端。其中上端和下端中的至少一端沿第一通孔111的径向向外延伸并覆盖盖板的一表面。
在一个实施例中，参照图1所示，绝缘件13设于第一通孔111的内周面上，绝缘件13的两端分别沿第一通孔111的径向向外延伸并覆盖盖板 11的上表面和下表面。
例如在图1中，基座121包括第一基座和与第一基座连接的第二基座。第一基座为圆柱状结构。第二基座位于第一基座下端并伸出第一通孔111。第二基座沿第一通孔111的径向向外延伸覆盖所述绝缘件13的外表面并不超出绝缘件13的边缘。例如第一基座和第二基座采用一体成型方式制成所述基座121。
盖帽122包括第一帽体和与第一帽体连接的第二帽体。第一帽体为圆柱状结构，第一帽体通过第二通孔123与基座121连接。第二帽***于第一帽体上边并伸出第一通孔111。第二帽体沿第一通孔111的径向向外延伸覆盖所述绝缘件13的外表面并不超过绝缘件13的边缘。例如第一帽体和第二帽体采用一体成型方式制成所述盖帽122。
在又一个实施例中，参照图3和图6所示，绝缘件13设于第一通孔111的内周面上，绝缘件13的上端沿第一通孔111的径向向外延伸并覆盖盖板11的上表面。
例如在图8中，基座121包括第一基座和与第一基座连接的第二基座。其中第一基座为圆柱状结构，第一基座的下端伸出第一通孔111且伸出预设距离，第一基座的下端用于与极耳连接。由于第一基座的下端伸出第一通孔111，且伸出第一通孔111的第一基座下端与极耳连接，因此电芯引出的极耳与盖板11之间存在预设距离，其中两者之间存在的预设距离能够避免极耳与盖板11接触。因此在本例子盖板11的下表面未覆盖绝缘件。
基座121的第二基座位于第一基座上端，第二基座沿第一通孔111的径向延伸并覆盖一部分绝缘件13的外表面并不超出绝缘件13的边缘。
在基座121的第一基座和第二基座上均开设有通孔，其中在第一基座上开设的通孔与在第二基座上开设的通孔连通形成第二通孔123。在本实施例中第二通孔123为阶梯孔。盖帽122盖设在阶梯孔上，其中盖帽122的上表面与第二基座的上表面平齐设置。本实施例中盖帽122为柱状结构。
在一个可选的实施例中，参照图5所示，沿所述第一通孔111的轴向方向，所述绝缘件13还包括绝缘支臂131，所述盖板11沿其厚度方向上形成有容置槽，所述绝缘支臂131嵌设在所述容置槽内。
例如在绝缘件13上设置绝缘支臂131，绝缘支臂131与盖板11连接，提高了绝缘件13与盖板11之间的连接面积，进而可以增强绝缘件13与盖板11的连接强度。在一个实施例中，所述绝缘支臂131的设置方向与所述绝缘件13的延伸方向垂直。
在一个可选的实施例中，参照图1、图5和图8所示，所述基座121包括第一基座1211和与所述第一基座1211连接的第二基座1212。所述第一基座1211与所述盖板11连接，所述第二基座1212贯穿所述第一通孔111。例如第一基座1211的径向尺寸大于第二基座1212的径向尺寸，第一基座1211能够与盖板11的上表面连接，同时第一基座1211与盖板11的上表面之间设置有绝缘件13。本例子提高了基座121与盖板11的连接可靠性。
在一个实施例中，参照图5和图7所示，所述第一基座1211靠近所述第二基座1212一侧形成有第一连接面，所述第二基座1212靠近所述第一基座1211一侧形成有第二连接面，所述第一连接面和所述第二连接面相对设置并连接。
沿所述第一通孔111的径向方向，所述第一连接面的尺寸大于所述第二连接面的尺寸，所述第一连接面设置在极耳31的上方用于与所述极耳31电连接。
具体地，参照图3和图5所示，第一基座1211和第二基座1212采用一体成型方式成型。第一基座1211和第二基座1212上分别开设通孔，第一基座1211上开设的通孔和第二基座1212上开设的通孔连通形成第二通孔123。
第一基座1211呈T型结构，其第一基座1211的下端伸出第一通孔111，第一基座1211的下端并伸出预设距离。
第二基座1212呈梯形结构，其中第二基座1212的上底长度大于第二基座1212的下底长度。
第一基座1211的下端形成的第一连接面，与第二基座1212的上底形成的第二连接面连接。由于沿所述第一通孔111的径向方向，所述第一连接面的尺寸大于所述第二连接面的尺寸，因此第一基座1211和第二基座 1212连接之后，沿第一通孔111的径向方向，第一连接面相对于第二连接面形成有延伸面。
在电池盖板1应用到电池中，电池包括壳体2和设置在壳体2内部的电芯3。电芯3引出极耳31，延伸面位于极耳31上方并与极耳31电连接，例如延伸面与极耳31焊接。由于延伸面按压在极耳31上方，限制了极耳31沿电池高度方向的位移，避免了极耳31与盖板11接触，进而防止了电池发生短路现象。
在一个可选的实施例中，参照图5所示，所述绝缘件13设于所述第一通孔111的内周面上，所述绝缘件13上端沿所述第一通孔111的径向向外延伸并覆盖所述盖板11的外表面。
由于基座121的特定的结构设计，基座121的第一基座1211下端形成的第一连接面能够按压在极耳31上，限制了极耳31沿电池高度方向的位移，避免了极耳31与盖板11接触，进而防止了电池发生短路现象。
因此本例子绝缘件13设于第一通孔111的内周面上，绝缘件13包括相对设置的上端和下端，其中只需要绝缘件13的上端沿所述第一通孔111的径向向外延伸并覆盖所述盖板的外表面，以避免基座121与盖板11直接接触造成电池短路。
在一个可选的实施例中，所述盖板11、基座121和所述绝缘件13为一体成型件。
例如盖板11、基座121和绝缘件13采用注塑方式一体成型。盖板11、基座121和绝缘件13为一体结构件。本例子电池盖板1的装配过程简单，便于用户操作。在一个例子中，将电池盖板1应用到电池中，先将盖板11、基座121和绝缘件13构成的一体结构件与电池的壳体2连接。然后通过基座121上形成的第二通孔123注入电解液。最后将盖帽122设于第二通孔123对电池进行密封。
在一个可选的实施例中，所述基座121的材质与所述盖帽122的材质相同。
例如基座121和盖帽122可以均采用铝材质。基座121的材质与盖帽122材质相同，基座121和盖帽122可以作为同一电极将电池电流引出。 例如基座121和盖帽122可以均作为正极将电池电流引出。例如将电池盖板1应用到电池中，将电芯3的正极耳与基座121焊接或者将电芯3的正极耳与盖帽122焊接。
根据本公开一个实施例，提供一种电池。参照图1-图9所示，包括壳体2和第一方面所述的电池盖板1。所述壳体2一侧形成开口，所述电池盖板1覆盖所述开口，所述盖板11与所述壳体2焊接。
例如所述壳体2包括侧壁，侧壁围合在壳体2的周向方向上，侧壁围合呈圆柱筒状或者侧壁围合呈立方体结构。所述壳体2至少一端形成开口，电池盖板1闭合所述开口。
在一个具体的实施例中，所述壳体2包括侧壁和底壁，其中侧壁和底壁一体成型。所述壳体2与底壁相对的一端形成开口，电池盖板1闭合所述开口。
盖板11与壳体2可以采用激光焊接或者电阻焊接连接。
在一个可选的实施例中，所述盖板11的材质与所述壳体2的材质相同。
例如盖板11与壳体2采用钢材料，盖板11与壳体2可以作为电池的同一电极的引出端，基座121和盖帽122可以作为电池的另一电极的引出端。例如电芯3包括正极耳和负极耳，其中正极耳与基座121或盖帽122电连接，负极耳与壳盖板11或者壳体2电连接，确保电池的正常使用。
在一个可选的实施例中，参照图5所示，在所述电池盖板1覆盖所述开口的状态下，所述基座121的至少一部分延伸至所述壳体2内部。
例如基座121包括第一基座1211和第二基座1212，其中第二基座1212延伸至壳体2内部，进一步提高了电池盖板1和壳体2之间的密封性。
根据本公开一个实施例，提供了一种电池的制备方法，所述方法包括以下步骤：
提供壳体2，所述壳体2内设置有电芯3；
提供电池盖板1，将盖板11与所述壳体2焊接并且基座121与所述盖板11通过绝缘件13隔离；
通过所述基座121上的第二通孔123将电解液注入所述壳体2内；
将盖帽122设置于所述第二通孔123内密封所述电池。
具体地，提供壳体2，壳体2的材质可以采用钢材质。壳体2形成有容纳腔，电芯3位于容纳腔内。
将盖板11与壳体2焊接。盖板11沿其厚度方向贯通形成第一通孔111，基座121位于第一通孔111内；并且基座121与盖板11通过绝缘件13隔离。在一个优选的实施例中，盖板11、绝缘件13和基座121采用一体成型方式成型构成一体结构件。将一体结构件盖设在壳体2上。
然后通过基座121上形成的第二通孔123向壳体2内注入电解液。
最后将盖帽122通过第二通孔123与基座121密封连接。
由于盖帽122和基座121可拆卸连接，因此相对于现有技术，本例子电池盖板1不需要单独在盖板11上开设通孔以作为注液孔，提高了电池盖板1的强度。另一方面盖板11和基座121可拆卸连接，便于向壳体2内补充电解液。
再一方面，本例子先将盖板11与壳体2焊接，然后在通过基座121上形成的第二通孔123向壳体2内注入电解液。现有技术中在电池的装配过程中，先向壳体中注入电解液，再将电池盖板与壳体进行焊接。相对于现有技术，本例子改变了电池的装配顺序，避免壳体与盖板的焊接时产生的高温影响先注入的电解液性质。
可选地，在通过所述基座121上的第二通孔123将电解液注入所述壳体2内步骤之前，还包括：
将电芯3的正极耳与所述基座121焊接，将电芯3的负极耳与所述盖板11或者所述壳体2焊接。
具体地，电芯3包括正极耳和负极耳。基座121作为正极的引出端，盖板11或者壳体2作为负极的引出端。可以将电芯3的正极耳与所述基座121焊接，将电芯3的负极耳与所述盖板11或者所述壳体2焊接，然后在通过所述基座121上的第二通孔123将电解液注入所述壳体2内。
可选地，在通过所述基座121上的第二通孔123将电解液注入所述壳体2内步骤之前，还包括：
将电芯3的负极耳与所述盖板11或者所述壳体2焊接；
在将盖帽122设置于所述第二通孔123内密封所述电池步骤之后，还包括：
将电芯3的正极耳与所述盖帽122焊接。
具体地，基座121和盖帽122作为电池的同一极引出电流。本例子将盖帽122与电芯3的正极耳焊接。
在本例子中，电芯3包括正极耳和负极耳。盖帽122作为正极的引出端，盖板11或者壳体2作为负极的引出端。
在通过所述基座121上的第二通孔123将电解液注入所述壳体2内步骤之前，将电芯3的负极耳与所述盖板11或者所述壳体2焊接。
在将盖帽122设置于所述第二通孔123内密封所述电池步骤之后，通过设于壳体2外部的激光器将电芯3的正极耳与所述盖帽122焊接。
虽然已经通过例子对本公开的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本公开的范围。本领域的技术人员应该理解，可在不脱离本公开的范围和精神的情况下，对以上实施例进行修改。本公开的范围由所附权利要求来限定。

Claims (15)

  1. 一种电池盖板，其特征在于，包括：
    盖板，所述盖板沿其厚度方向贯通形成第一通孔；
    基座，所述基座的至少一部分位于所述第一通孔内，所述基座与所述盖板之间设置有绝缘件；所述基座沿其厚度方向贯通形成第二通孔；
    盖帽，所述盖帽的至少一部分位于所述第二通孔内并与所述基座可拆卸连接，在所述盖帽与所述基座处于分离的状态下，所述第二通孔作为注液孔。
  2. 根据权利要求1所述的电池盖板，其特征在于，所述基座与所述盖帽之间设置有连接部。
  3. 根据权利要求1或2所述的电池盖板，其特征在于，所述第二通孔的内壁上形成有内螺纹，至少一部分所述盖帽的外壁上形成有外螺纹，所述基座和所述盖帽螺纹连接。
  4. 根据权利要求1所述的电池盖板，其特征在于，所述盖帽嵌设在所述第二通孔内，所述盖帽与所述基座之间设置有密封膜。
  5. 根据权利要求1所述的电池盖板，其特征在于，所述绝缘件设于所述第一通孔的内周面上，所述绝缘件的两端中的至少一端沿所述第一通孔的径向向外延伸并覆盖所述盖板的表面。
  6. 根据权利要求5所述的电池盖板，其特征在于，沿所述第一通孔的轴向方向，所述绝缘件还包括绝缘支臂；
    所述盖板沿其厚度方向上形成有容置槽，所述绝缘支臂嵌设在所述容置槽内。
  7. 根据权利要求1所述的电池盖板，其特征在于，所述基座包括第一基座和与所述第一基座连接的第二基座；
    所述第一基座与所述盖板连接，所述第二基座贯穿所述第一通孔。
  8. 根据权利要求7所述的电池盖板，其特征在于，所述第一基座靠近所述第二基座一侧形成有第一连接面，所述第二基座靠近所述第一基座一侧形成有第二连接面，所述第一连接面和所述第二连接面相对设置并连接；
    沿所述第一通孔的径向方向，所述第一连接面的尺寸大于所述第二连接面的尺寸，所述第一连接面设置在极耳的上方用于与所述极耳电连接。
  9. 根据权利要求8所述的电池盖板，其特征在于，所述绝缘件设于所述第一通孔的内周面上，所述绝缘件上端沿所述第一通孔的径向方向向外延伸并覆盖所述盖板的外表面。
  10. 根据权利要求1所述的电池盖板，其特征在于，所述盖板、基座和所述绝缘件为一体成型件。
  11. 一种电池，其特征在于，包括壳体和如权利要求1-10任一项所述的电池盖板；
    所述壳体一侧形成开口，所述电池盖板覆盖所述开口，所述盖板与所述壳体焊接。
  12. 根据权利要求11所述的电池，其特征在于，在所述电池盖板覆盖所述开口的状态下，所述基座的至少一部分延伸至所述壳体内部。
  13. 一种电池的制备方法，其特征在于，所述方法包括步骤：
    提供壳体，所述壳体内设置有电芯；
    提供电池盖板，将盖板与所述壳体焊接并且基座与所述盖板通过绝缘件隔离；
    通过所述基座上的第二通孔将电解液注入所述壳体内；
    将盖帽设置于所述第二通孔内密封所述电池。
  14. 根据权利要求13所述的方法，其特征在于，在通过所述基座上的第二通孔将电解液注入所述壳体内的步骤之前，还包括：
    将电芯的正极耳与所述基座焊接，将电芯的负极耳与所述盖板或者所述壳体焊接。
  15. 根据权利要求13所述的方法，其特征在于，在通过所述基座上的第二通孔将电解液注入所述壳体内的步骤之前，还包括：
    将电芯的负极耳与所述盖板或者所述壳体焊接；
    在将盖帽设置于所述第二通孔内密封所述电池的步骤之后，还包括：将电芯的正极耳与所述盖帽焊接。
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