WO2022135282A1 - 电池 - Google Patents

电池 Download PDF

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Publication number
WO2022135282A1
WO2022135282A1 PCT/CN2021/139021 CN2021139021W WO2022135282A1 WO 2022135282 A1 WO2022135282 A1 WO 2022135282A1 CN 2021139021 W CN2021139021 W CN 2021139021W WO 2022135282 A1 WO2022135282 A1 WO 2022135282A1
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WO
WIPO (PCT)
Prior art keywords
battery
tab
sealing
cover body
injection hole
Prior art date
Application number
PCT/CN2021/139021
Other languages
English (en)
French (fr)
Inventor
陈龙云
曾玉祥
王永旺
许德胜
林鸿凯
Original Assignee
珠海冠宇电池股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 珠海冠宇电池股份有限公司 filed Critical 珠海冠宇电池股份有限公司
Priority to EP21909278.0A priority Critical patent/EP4156387A1/en
Publication of WO2022135282A1 publication Critical patent/WO2022135282A1/zh
Priority to US18/146,008 priority patent/US20230126021A1/en

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/153—Lids or covers characterised by their shape for button or coin cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • 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
    • 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 utility model relates to the field of battery processing and manufacturing, in particular to a battery.
  • Polymer lithium-ion button batteries have the advantages of small size, light weight and large capacity, so they are widely used in various microelectronic products. middle.
  • the shell of the button battery is cylindrical, the bottom surface of one end of the cylindrical shape is integrally formed with the shell of the button battery, and the other end is provided with a steel ring-shaped metal cover plate, the outer diameter end of the metal cover plate is connected with the shell of the button battery, and the surface of the inner diameter end passes through the shell of the button battery.
  • the electrical insulating seal is bonded to the outer diameter end of the aluminum metal ring, and the inner diameter end of the aluminum metal tube is the injection hole of the button battery.
  • the staff or the working system injects the electrolyte into the button battery through the injection hole, and then Seal the injection hole with a sealing sheet.
  • the above-mentioned batteries have low stability, poor sealing properties of the batteries, and poor safety.
  • the present invention provides a battery, which improves the application stability of the battery and improves the sealing performance and safety of the battery.
  • the present invention provides a battery, which includes a casing, the casing is a metal part, and the casing includes a bottom casing and a cover body, and the cover body is closed on the opening of the bottom casing.
  • the cover body includes an installation hole, a conductive sealing nail is arranged in the installation hole, and a clamping slot is arranged on the side periphery of the sealing nail.
  • a sealing element is arranged at the connection between the card slot and the cover body, and the sealing element is an electrical insulating element.
  • the sealing nail is provided with a liquid injection hole, and the liquid injection hole is located in the center of the cover body.
  • the housing has an accommodating cavity, and the liquid injection hole communicates with the accommodating cavity.
  • an installation groove is provided on the side of the sealing nail away from the bottom case, and the liquid injection hole is located at the bottom of the groove of the installation groove.
  • a sealing member is arranged in the installation groove, the surface of the sealing member is lower than the notch of the installation groove, and the sealing member seals the liquid injection hole.
  • the center of the sealing member and the center of the liquid injection hole are located on the central axis of the cover body.
  • the diameter of the liquid injection hole is 0.5-3 mm, and/or the distance between the outer edge of the sealing member and the groove wall of the installation groove is 0-2 mm, and/or the sealing The distance between the side of the nail close to the bottom shell and the groove bottom of the installation groove is 0.1-2 mm, and/or the groove depth of the installation groove is 0-1 mm.
  • the battery includes a battery module, the battery module is located in the accommodating cavity, and the central axis of the battery module coincides with the central axis of the casing.
  • the distance between the side of the sealing nail close to the battery module and the battery module is 0.1-3 mm, and/or the thickness of the groove wall of the slot outside the casing is 0-1 mm.
  • the accommodating cavity includes a liquid storage area and a core storage area
  • the battery module is located in the core storage area
  • the liquid injection hole and the liquid storage area are arranged opposite to each other
  • the liquid injection hole is opposite to the liquid storage area. Connected.
  • the battery module includes a first electrode sheet and a second electrode sheet, the first electrode sheet and the second electrode sheet are staggered and stacked, and the adjacent first electrode sheet and second electrode sheet An electrically insulating separator is arranged between the sheets.
  • the first electrode piece is provided with a first tab, which is connected with the sealing nail and is electrically connected to form the first electrode of the battery;
  • the second pole piece is provided with a second tab, and the second tab is connected to the casing connected and electrically conducting to form the second electrode of the battery.
  • a hollow reel is disposed in the middle of the accommodating cavity, and the battery module is wound on the reel.
  • the interior of the reel forms a liquid storage area, and the outer wall of the battery module is coated with insulating glue.
  • the first tab and the second tab are on the same side of the reel, and/or the plane where the first tab is located and the plane where the second tab is located have an included angle, and the angle of the angle is The range is 0° to 180°, and/or, the first tab and the second tab are fixed in the battery module by bending, and the bending angle of the first tab and/or the second tab is in the range of 45° ° to 90°.
  • the cover body close to the installation hole is limited to protrude into the card slot, and is fixedly connected with the card slot, thereby improving the gap between the sealing nail and the cover body.
  • connection reliability By arranging a sealing member at the connection between the card slot and the cover body, the connection short circuit between the sealing nail and the cover body is avoided, and the sealing performance of the battery case is improved at the same time. Between the nail and the cover body, it is ensured that the battery is suitable for various harsh application environments, and the application stability and safety of the battery are improved.
  • FIG. 1 is a schematic diagram of the overall structure of a battery provided by an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a battery provided by an embodiment of the present invention during assembly
  • FIG. 3 is a cross-sectional view of a structure of a battery provided by an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of another structure of a battery provided by an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a cover body of a battery provided by an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of the section A-A of FIG. 1 according to an embodiment of the present invention.
  • the shell of the button battery is cylindrical, the bottom surface of one end of the cylindrical shape is integrally formed with the shell of the button battery, and the other end is provided with a steel ring-shaped metal cover plate, the outer diameter end of the metal cover plate is connected with the shell of the button battery, and the surface of the inner diameter end is
  • the insulating sealing member is bonded to the aluminum metal ring.
  • PP glue Polypropylene glue, polypropylene glue
  • the inner diameter end of the aluminum metal ring is the injection hole of the button battery. The staff or the working system injects the electrolyte into the button battery through the injection hole, and then seals the injection hole with a sealing sheet.
  • the PP glue is prone to softening, which increases the probability of its falling off in the metal cover and aluminum metal ring, affecting the sealing performance of the battery. The probability of large battery leakage occurs, thereby reducing the safety of the battery.
  • the cover body by arranging a card slot on the side periphery of the cover body, the cover body close to the installation hole is limited to protrude into the card slot, and is firmly connected with the card slot, so that the sealing nail is improved.
  • the connection reliability with the cover body By arranging a sealing member at the connection between the card slot and the cover body, the connection short circuit between the sealing nail and the cover body is avoided, and the sealing performance of the battery case is improved at the same time. Between the nail and the cover, it is ensured that the battery is suitable for various harsh application environments, and the application stability and safety of the battery are improved.
  • FIG. 1 is a schematic diagram of the overall structure of a battery provided by an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a battery provided by an embodiment of the present invention during assembly
  • FIG. 3 is a cross-section of a structure of the battery provided by an embodiment of the present invention.
  • 4 is a cross-sectional view of another structure of the battery provided by the embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of the cover body of the battery provided by the embodiment of the present invention
  • FIG. 6 is provided by the embodiment of the present invention.
  • a schematic diagram of the structure of the A-A section of FIG. 1 A schematic diagram of the structure of the A-A section of FIG. 1 .
  • an embodiment of the present invention provides a battery, including a casing 100, the casing 100 is a metal part, the casing 100 includes a bottom case 110 and a cover body 120, and the cover body 120 is covered with the bottom case 110 on the opening.
  • the cover body 120 includes an installation hole, a conductive sealing nail 121 is arranged in the installation hole, a clamping groove is provided on the side periphery of the sealing nail 121, and the cover body 120 near the installation hole extends into the clamping groove and is clamped with the clamping groove. connect.
  • a sealing member 124 is provided at the connection between the card slot and the cover body 120 , and the sealing member 124 is an electrical insulating member.
  • the clamping connection between the cover body 120 and the sealing nail 121 improves the connection reliability between the two.
  • the sealing member 124 is provided therein, and the sealing member 124 is provided as an electrical insulating member with certain elasticity and corrosion resistance. , to seal the battery and prevent the battery from short-circuiting.
  • the external force acts on the side of the sealing nail 124 away from the bottom case 110, the sealing nail 121 undergoes a certain plastic deformation, and the contact area between the sealing nail 121 and the sealing element 124 on the side close to the bottom case 110 is increased, and the sealing element is improved.
  • the force between 124 and the sealing nail 121 This arrangement can ensure that the sealing member 124 is always clamped between the sealing nail 121 and the cover body 120.
  • the sealing member 124 can always play the role of sealing the battery and isolating the cover body 120 and the sealing nail 121. It ensures that the battery is suitable for various harsh application environments, and improves the application stability and safety of the battery.
  • the sealing member 124 is a rubber ring structure, which is sleeved on the installation hole of the cover body 120, and the material of the sealing member 124 is one or more of EPDM rubber, fluorine rubber, silicone rubber, and PP. .
  • the contact area between the side of the cover body 120 away from the bottom case 110 and the sealing member 124 should be smaller than that of a side of the cover body 120 close to the bottom case 110 .
  • the contact area between the side and the sealing member 124 ensures that the force between the sealing member 124 and the side of the sealing pin 121 close to the bottom case 110 is relatively large.
  • the sealing nail 121 is provided with a liquid injection hole 122 , and the liquid injection hole 122 is located in the center of the cover body 120 .
  • the housing 100 has an accommodating cavity, and the liquid injection hole communicates with the accommodating cavity.
  • the battery module 200 is arranged in the accommodating cavity.
  • the battery module 200 enters the core storage area in the accommodating cavity of the battery through the installation hole.
  • the sealing nail 121 plays the role of sealing the battery casing 100.
  • the structure of the battery cover 120 is simplified. After the electrolyte enters the accommodating cavity through the injection hole 122, it directly enters the liquid storage area 101. Under the action of gravity, the electrolyte directly reaches the bottom of the battery case 100, and then infiltrates the battery modules 200 on both sides.
  • the shape of the outer peripheral edge of the liquid injection hole 122 may be a circle. In this case, the center of the circle coincides with the center of the cover body 120 .
  • the outer periphery of the liquid injection hole 122 may also be a polygon. In this case, the polygons are symmetrically distributed along the center of the cover body 120 .
  • the outer periphery of the liquid injection hole 122 may also be an asymmetrical polygon, and the embodiment of the present invention does not limit the shape of the outer periphery of the liquid injection hole.
  • an installation groove 123 is provided on the side of the sealing nail 121 away from the bottom case 110 , and the liquid injection hole 122 is located at the groove bottom of the installation groove 123 .
  • a sealing member 125 is disposed in the installation groove 123 , the surface of the sealing member 125 is lower than the notch of the installation groove 123 , and the sealing member 125 seals the liquid injection hole 122 .
  • Both the sealing nail 121 and the sealing member 125 are made of metal, preferably aluminum or aluminum alloy.
  • Aluminum or aluminum alloy has the characteristics of good electrical conductivity, soft texture, and relatively stable in air.
  • aluminum is selected as the preferred material for the sealing nail 121 and the sealing member 125 to ensure the working performance of the battery.
  • the bottom case 110 and the cover body 120 of the case 100 are preferably made of steel, which can avoid the hydrolysis reaction of the battery case 100 of the lithium ion battery under high potential and improve the stability of the battery.
  • the sealing member 125 and the sealing nail 121 are connected together by welding, and the welding method adopts one or more of resistance welding, ultrasonic welding, and laser welding.
  • the welding of the sealing nails 121 increases the weight of the battery, reduces the range of usage scenarios of the battery, and affects the working performance of the battery.
  • the shape of the outer peripheral edge of the sealing member 125 may be a circle.
  • the center of the circle coincides with the center of the liquid injection hole 122;
  • the outer peripheral edge shape of the sealing member 125 may also be a polygon.
  • the center coincides with the center of the liquid injection hole 122 , and the side of the sealing member 125 close to the liquid injection hole 122 should completely cover the liquid injection hole 122 to ensure the sealing effect of the sealing member 125 on the liquid injection hole 122 .
  • the shape of the outer edge of the sealing member 125 can be the same as or different from the shape of the outer edge of the liquid injection hole 122. This embodiment does not limit this, as long as the sealing member can cover the liquid injection hole.
  • the schematic diagram of the overall structure of the battery and the schematic diagram of the structure of the sealing member provided in the embodiment can be referred to as shown in FIG. 1 .
  • the center of the sealing member and the center of the liquid injection hole are located on the central axis of the cover body.
  • the liquid injection hole is located at the center of the cover body 120, and the liquid injection hole 122 enters the battery container.
  • the electrolyte in the accommodating cavity can directly enter the center of the accommodating cavity, thereby reducing the working time of the liquid injection needle during the battery injection process, and improving the efficiency of battery processing and preparation.
  • the shape of the outer peripheral edge of the liquid injection hole 122 may be a circle. In this case, the center of the circle coincides with the center of the cover body 120 .
  • the outer periphery of the liquid injection hole 122 may also be a polygon. In this case, the polygons are symmetrically distributed along the center of the cover body 120 .
  • the outer periphery of the liquid injection hole 122 may also be an asymmetrical polygon, and the embodiment of the present invention does not limit the shape of the outer periphery of the liquid injection hole.
  • the diameter L1 of the liquid injection hole 122 is 0.5-3 mm.
  • the strength of the sealing nail 121 can be ensured.
  • the injection hole has a fast injection speed.
  • the diameter L1 of the liquid injection hole 122 is less than 0.5 mm, the diameter L1 of the liquid injection hole 122 is too small, the battery liquid injection speed is slow, and the processing and manufacturing efficiency of the battery is affected.
  • the diameter of the hole 122 is too large, so that the mechanical strength of the sealing pin 121 is too small, which reduces the stability and safety of the battery.
  • the value of the diameter L1 of the liquid injection hole 122 can be set according to actual processing requirements or usage requirements, which is not limited in the embodiment of the present invention.
  • the distance L2 between the outer edge of the sealing member 125 and the groove wall of the installation groove 123 is 0-2 mm.
  • the sealing member 125 and the groove wall of the installation groove 123 are tightly connected.
  • the value of L2 is greater than 2 mm, the distance between the sealing member 125 and the groove wall of the installation groove 123 If the distance is too large, the overall aesthetics of the battery will be reduced, and dust is easy to accumulate in the gap, causing certain risks to the battery application.
  • the distance L2 between the outer edge of the sealing member 125 and the groove wall of the installation groove 123 can be set according to the needs of the user, which is not limited in the embodiment of the present invention.
  • the distance H1 between the side of the sealing nail 121 close to the bottom case 110 and the groove bottom of the installation groove 123 is 0.1-2 mm, and setting the value of H1 to be greater than 0.1 mm can ensure that the sealing nail 121 has high strength, so as to prevent To achieve the function of sealing the battery module 200 and the electrolyte, however, the value of H1 cannot be too large.
  • the value of H1 is greater than 2 mm, the thickness of the sealing nail 121 is too large, which increases the gap between the sealing member 125 and the sealing nail 121. The difficulty of welding will affect the connection between the sealing member 125 and the sealing nail 121, thereby reducing the processing and preparation efficiency of the battery.
  • the groove depth of the installation groove 123 is 0 ⁇ 1 mm.
  • the sealing nail 121 is not provided with an installation groove, and the sealing member 125 can be directly welded to the side of the sealing nail away from the battery module 200 .
  • the sealing member 125 can also be arranged in the installation groove 123 to improve the aesthetics of the battery processing.
  • the groove depth of the installation groove 123 should be less than or equal to 1 mm.
  • the accommodating cavity includes a liquid storage area 101 and a core storage area.
  • the battery module 200 is located in the core storage area, and the casing 100 is provided with a liquid injection hole 122 .
  • the liquid hole 122 and the liquid storage area 101 are disposed opposite to each other, and the liquid injection hole 122 communicates with the liquid storage area 101 .
  • FIG. 2 after the electrolyte enters the accommodating cavity through the injection hole 122, it directly enters the liquid storage area 101. Under the action of gravity, the electrolyte directly reaches the bottom of the battery case 100, and then infiltrates the batteries on both sides. Module 200.
  • the liquid storage area 101 is located in the center of the accommodating cavity, and the storage area 101 is located in the center of the accommodating cavity.
  • a core region is formed between the outer peripheral edge of the liquid region 101 and the inner wall surface of the casing 100 .
  • the central axis of the battery module 200 is coincident with the central axis of the casing 100 .
  • the electrolyte in the liquid storage area 101 is symmetrically distributed along the center of the accommodating cavity, and then the electrolyte flows to both sides at the same time, and the electrolyte infiltrates both sides of the battery module 200.
  • the time required is roughly the same.
  • the distance H2 between the side of the sealing nail 121 close to the battery module 200 and the battery module 200 is 0.1-3 mm. Setting the value of H2 to be greater than 0.1 mm can provide sufficient space for the installation of the first tab 203. However, The value of H2 cannot be too large.
  • the thickness H3 of the groove wall of the card groove outside the casing 100 is 0-1 mm.
  • the value of H3 is 0, that is, there is no clamping slot between the sealing nail 121 and the cover body 120 .
  • the sealing effect of the sealing element 124 on the battery is improved.
  • the value of H3 is greater than 1 mm, the overall thickness of the battery cover 120 is increased, the weight of the battery is increased, and the applicability of the battery in microelectronic devices and precision electronic devices cannot be satisfied.
  • the battery module 200 includes a first electrode sheet 201 and a second electrode sheet 202, and the first electrode sheet 201 and the second electrode sheet 202 are staggered and stacked.
  • An electrically insulating separator 205 is disposed between the adjacent first electrode sheets 201 and the second electrode sheets 202 .
  • the first electrode tab 201 is provided with a first tab 203, the first tab 203 is connected with the sealing nail 121 and is electrically connected to form the first electrode of the battery;
  • the second tab 202 is provided with a second tab 204 , the second tab 204 is connected to the casing 100 and is electrically connected to form the second electrode of the battery.
  • the diaphragm 205 plays the role of isolating the first electrode sheet 201 and the second electrode sheet 202, preventing the two electrode sheets from contacting each other and causing an internal short circuit.
  • the diaphragm 205 can be The semi-permeable layer prevents the passage of relatively large molecules and only allows the passage of charged ions of small volume, which can improve the concentration difference near the positive and negative electrodes, which is conducive to the diffusion of ions, thereby improving the storage efficiency of the battery.
  • both the first electrode sheet 201 and the second electrode sheet 202 are coated with battery active materials, and preferably, the surface of the first electrode sheet 201 is coated with lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt manganese oxide lithium aluminum , one or more of lithium nickel cobalt aluminate, lithium manganate, lithium iron phosphate, lithium iron phosphate, and the surface of the second electrode sheet 202 is coated with graphite, silicon carbon, silicon oxygen, lithium titanate, hard carbon
  • the first electrode sheet 201 is the positive electrode sheet of the battery
  • the second electrode sheet 202 is the negative electrode sheet in the battery.
  • the total area of the second electrode sheet 202 should be larger than the total area of the first electrode sheet 201 .
  • One end of the first tab 203 is welded with the first electrode sheet 201, and the other end is welded with the sealing nail 121, so as to realize the connection between the first electrode sheet 201 and the sealing nail 121, and the side where the sealing nail 121 of the battery is located is the battery
  • the first electrode in a preferred embodiment, the first electrode is the positive electrode.
  • one end of the second tab 204 is welded with the second electrode sheet 202, and the other end is welded with the cover body 120 of the battery, so as to realize the connection between the second electrode sheet 202 and the battery cover body. At this time, the battery cover body The location where 120 is located is the second electrode of the battery.
  • FIG. 1 One end of the first tab 203 is welded with the first electrode sheet 201, and the other end is welded with the sealing nail 121, so as to realize the connection between the first electrode sheet 201 and the sealing nail 121, and the side where the sealing nail 121 of the battery is located is the battery
  • the first electrode in a preferred embodiment, the
  • one end of the second electrode tab 204 is welded with the second electrode sheet 202 , and the other end is welded with the bottom case 110 of the battery, so that the second electrode sheet 202 is connected to the bottom case 110 of the battery.
  • the bottom case is the second electrode of the battery, and in a preferred embodiment, the second electrode is the negative electrode.
  • the welding method between 204 and the bottom case 110 adopts one or more of resistance welding, ultrasonic welding, and laser welding.
  • a tab glue 207 is provided on the outer side of the first tab 203, and the tab glue 207 is an electrical insulating member.
  • a hollow reel is disposed in the middle of the accommodating cavity, and the battery module 200 is wound on the reel.
  • a liquid storage area 101 is formed inside the reel, and an insulating glue 206 is coated on the outer wall of the battery module 200 .
  • the first electrode sheet 201, the second electrode sheet 203, and the separator 205 are combined into the battery module 200 in the embodiment of the present utility model by winding, and this arrangement can increase the size of the first electrode sheet 201 and the second electrode sheet. 202 area, thereby increasing the battery capacity.
  • the battery module 200 is wound and arranged to increase the infiltration area between the electrolyte and the battery module, so as to improve the working performance of the battery.
  • the insulating glue 206 provided outside the battery module 200 can prevent the first electrode sheet 201 or the lap short circuit between the second electrode sheet and the battery case 200 .
  • the first tab 203 and the second tab 204 are on the same side of the reel, or the plane where the first tab 203 is located is on the same side as the second tab
  • the plane where the tabs 204 are located has an included angle ⁇ , and the included angle ⁇ ranges from 0° to 180°, or the first tab 203 and the second tab 204 are fixed in the battery module 200 by bending, and the first tab 203 and the second tab 204 are fixed in the battery module 200 by bending.
  • the bending angle of the second tab 204 ranges from 45° to 90°.
  • the included angle ⁇ is in the range of 90° to 180°.
  • Such an arrangement can keep the distance between the first tab 203 and the second tab 204 large enough to avoid a situation of lap short circuit in the arrangement of the battery accommodating cavity in the future.
  • the battery provided by the present invention solves the problems of low stability, poor sealing and poor safety of the battery in the related art.
  • the structure of the battery reduces the volume of the battery and the weight of the battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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Abstract

一种电池，该电池包括壳体(100)，壳体(100)为金属件，壳体(100)包括底壳(110)和盖体(120)，盖体(120)盖合在底壳(110)的开口上；盖体(120)包括安装孔，安装孔内设置有导电的密封钉(121)，密封钉(121)的侧周缘设置有卡槽，靠近安装孔处的盖体(120)伸入卡槽中，并与卡槽卡固连接；卡槽和盖体(120)的连接处设置有密封件(124)，密封件(124)为电性绝缘件。所述结构提高了电池的应用稳定性，并提高了电池的密封性和安全性。

Description

电池
本申请要求于2020年12月21日提交中国专利局、申请号为202023105005.0、申请名称为“电池”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
本实用新型涉及电池加工制造领域，尤其涉及一种电池。
背景技术
随着科学技术的快速发展，智能产品逐渐朝着轻量化和小型化的方向发展，聚合物锂离子纽扣电池具有体型小、质量轻、容量大的优点，因此被广泛应用于各种微型电子产品中。
纽扣电池外壳为圆柱形，圆柱形一端的底面与纽扣电池的外壳一体设置，另外一端设置钢制环状金属盖板，金属盖板的外径端与纽扣电池的外壳连接，内径端表面上通过电绝缘的密封件与铝制金属环的外径端粘接，铝制金属管的内径端为纽扣电池的注液孔，工作人员或工作系统通过注液孔为纽扣电池内注入电解液，然后用封口片对注液孔进行密封。
然而，上述电池稳定性较低，电池的密封性差，安全性差。
实用新型内容
为了解决背景技术种提到的至少一个问题，本实用新型提供一种电池，提高了电池的应用稳定性，提高了电池的密封性和安全性。
为了实现上述目的，本实用新型提供一种电池，包括壳体，壳体为金属件，壳体包括底壳和盖体，盖体盖合在底壳的开口上。
盖体包括安装孔，安装孔内设置有导电的密封钉，密封钉的侧周缘设置有卡槽，靠近安装孔处的盖体伸入卡槽中，并与卡槽卡固连接。
卡槽和盖体的连接处设置有密封件，密封件为电性绝缘件。
在上述的电池中，可选的是，密封钉上开设有注液孔，注液孔位于盖体的中心。
壳体内具有容置腔，注液孔与容置腔连通。
在上述的电池中，可选的是，密封钉远离底壳的一侧设置有安装槽，注液孔位于安装槽的槽底处。
安装槽内设置有封口件，封口件的表面低于安装槽的槽口，封口件密封注液孔。
在上述的电池中，可选的是，封口件的中心，与注液孔的中心位于盖体的中轴线上。
在上述的电池中，可选的是，注液孔的直径为0.5～3mm，和/或，封口件的外边缘与安装槽的槽壁之间的距离为0～2mm，和/或，密封钉靠近底壳的一侧与安装槽的槽底之间的距离为0.1～2mm，和/或，安装槽的槽深为0～1mm。
在上述的电池中，可选的是，该电池包括电池模组，电池模组位于容置腔内，电池模组的中轴线与壳体的中轴线重合。
密封钉靠近电池模组的一侧与电池模组之间的距离为0.1～3mm，和/或，位于壳体外部的卡槽的槽壁厚度为0～1mm。
在上述的电池中，可选的是，容置腔包括储液区域和储芯区域，电池模组位于储芯区域中，注液孔与储液区域相对设置，且注液孔与储液区域连通。
在上述的电池中，可选的是，电池模组包括第一电极片和第二电极片，第一电极片和第二电极片交错且层叠设置，相邻的第一电极片和第二电极片之间设置有电性绝缘的隔膜。第一电极片上设置有第一极耳，第一极耳与密封钉连接且电性导通，形成电池的第一电极；第二极片上设置有第二极耳，第二极耳与壳体连接且电性导通，形成电池的第二电极。
在上述的电池中，可选的是，容置腔的中部设置有中空的卷轴，电池模组卷绕在卷轴上。卷轴的内部形成储液区域，电池模组的外壁面涂覆有绝缘胶。
在上述的电池中，可选的是，第一极耳和第二极耳在卷轴的同侧，和/或，第一极耳所在平面与第二极耳所在平面具有夹角，夹角的范围为0° 到180°，和/或，第一极耳与第二极耳通过弯折固定在电池模组中，第一极耳和/或第二极耳的弯折角度的范围为45°到90°。
本实用新型提供的电池，通过在盖体的侧周缘上设置卡槽，限定靠近安装孔的盖体伸入到卡槽中，并与卡槽卡固连接，提高了密封钉与盖体之间的连接可靠性。通过在卡槽和盖体的连接处设置密封件，避免了密封钉和盖体之间发生连接短路，同时提高了电池壳体的密封性，由于卡槽的设置，密封件始终卡紧在密封钉与的盖体之间，保证电池适用于各种恶劣的应用环境，提高了电池的应用稳定性和安全性。
本实用新型提供的电池的内容以及它的实用新型目的及有益效果将会通过结合附图而对优选实施例的描述而更加明显易懂。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作以简单地介绍，显而易见地，下面描述中的附图是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本实用新型实施例提供的电池的整体结构示意图；
图2为本实用新型实施例提供的电池组装时的结构示意图；
图3为本实用新型实施例提供的电池的一种结构的剖面图；
图4为本实用新型实施例提供的电池的另一种结构的剖面图；
图5为本实用新型实施例提供的电池的盖体的结构示意图；
图6为本实用新型实施例提供的图1的A-A截面的结构示意图。
附图标记说明：
100-壳体；
101-储液区域；
110-底壳；
120-盖体；
121-密封钉；
122-注液孔；
123-安装槽；
124-密封件；
125-封口件；
200-电池模组；
201-第一电极片；
202-第二电极片；
203-第一极耳；
204-第二极耳；
205-隔膜；
206-绝缘胶；
207-极耳胶。
具体实施方式
纽扣电池的外壳为圆柱形，圆柱形一端的底面与纽扣电池的外壳一体设置，另一端设置钢制环状金属盖板，金属盖板的外径端与纽扣电池的外壳连接，内径端表面上通过绝缘的密封件与铝制金属环粘结，相关技术中，绝缘件多采用PP胶(Polypropylene glue，聚丙烯胶)。铝制金属环的内径端为纽扣电池的注液孔，工作人员或工作系统通过注液孔为纽扣电池内注入电解液，然后用封口片对注液孔进行密封。然而，当电池在恶劣的应用环境，如高温高湿的应用环境中，PP胶易出现软化，加大了其在金属盖板与铝制金属环中脱落的概率，影响电池的密封性，加大电池漏液概率的发生，从而降低电池的安全性。
基于上述技术问题，本实用新型提供的电池，通过在盖体的侧周缘上设置卡槽，限定靠近安装孔的盖体伸入到卡槽中，并与卡槽卡固连接，提高了密封钉与盖体之间的连接可靠性。通过在卡槽和盖体的连接处设置密封件，避免了密封钉和盖体之间发生连接短路，同时提高了电池壳体的密封性，由于卡槽的设置，密封件始终卡紧在密封钉与盖体之间，保证电池适用于各种恶劣的应用环境，提高了电池的应用稳定性和安全性。
为使本实用新型的目的、技术方案和优点更加清楚，下面将结合本实用新型的优选实施例中的附图，对本实用新型实施例中的技术方案进行更 加详细的描述。在附图中，自始至终相同或类似的标号表示相同或类似的部件或具有相同或类似功能的部件。所描述的实施例是本实用新型一部分实施例，而不是全部的实施例。下面通过参考附图描述的实施例是示例性的，旨在用于解释本实用新型，而不能理解为对本实用新型的限制。基于本实用新型中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。下面结合附图对本实用新型的实施例进行详细说明。
图1为本实用新型实施例提供的电池的整体结构示意图，图2为本实用新型实施例提供的电池组装时的结构示意图，图3为本实用新型实施例提供的电池的一种结构的剖面图，图4为本实用新型实施例提供的电池的另一种结构的剖面图，图5为本实用新型实施例提供的电池的盖体的结构示意图，图6为本实用新型实施例提供的图1的A-A截面的结构示意图。
参照图1-6所示，本实用新型实施例提供一种电池，包括壳体100，壳体100为金属件，壳体100包括底壳110和盖体120，盖体120盖合在底壳110的开口上。盖体120包括安装孔，安装孔内设置有导电的密封钉121，密封钉121的侧周缘设置有卡槽，靠近安装孔处的盖体120伸入到卡槽中，并与卡槽卡固连接。卡槽和盖体120的连接处设置有密封件124，密封件124为电性绝缘件。盖体120与密封钉121之间设置卡固连接提高了二者之间的连接可靠性，通过在其中设置密封件124，且设置密封件124为具有一定的弹性和耐腐蚀性的电绝缘件，起到密封电池，并防止电池发生短路的功能。安装时，外力作用在密封钉124远离底壳110的一侧，密封钉121发生一定的塑性变形，密封钉121靠近底壳110的一侧与密封件124的接触面积加大，提高了密封件124与密封钉121之间的作用力。这样的设置能够保证密封件124始终卡紧在密封钉121与盖体120之间，当外部环境较为恶劣时，密封件124始终能够起到密封电池，隔离盖体120与密封钉121的作用，保证电池适用于各种恶劣的应用环境，提高了电池的应用稳定性和安全性。
需要说明的是，密封件124为胶圈结构，套设在盖体120的安装孔上，密封件124的材质为三元乙丙橡胶、氟橡胶、硅橡胶、PP中的一种或多种。此外，作为优选，为了提高密封钉121与对安装孔的密封效果，盖体 120上远离底壳110的一侧与密封件124之间的接触面积应小于盖体120上靠近底壳110的一侧与密封件124之间的接触面积，保证密封件124与密封钉121靠近底壳110的一侧之间的作用力较大。
作为一种可实现的实施方式，密封钉121上开设有注液孔122，注液孔122位于盖体120的中心。壳体100内具有容置腔，注液孔与容置腔连通。容置腔内设置有电池模组200，电池模组200通过安装孔进入电池的容置腔中的储芯区域中，密封钉121起到密封电池壳体100的作用，注液孔122开设在密封钉121上，简化了电池盖体120的结构。电解液经注液孔122进入到容置腔之后，直接进入储液区域101，在重力的作用下，电解液直接到达电池壳体100的底部，然后浸润两侧的电池模组200。
需要说明的是，注液孔122的外周缘的形状可以是圆形，此时，圆形的圆心与盖体120的中心重合。或者，注液孔122的外周缘也可以的多边形，此时，多边形的沿盖体120的中心对称分布。当然，注液孔122的外周缘也可以是非对称多边形，本实用新型实施例对注液孔的外周缘的形状不作限制。
作为一种可实现的实施方式，密封钉121远离底壳110的一侧设置有安装槽123，注液孔122位于安装槽123的槽底处。安装槽123内设置有封口件125，封口件125的表面低于安装槽123的槽口，封口件125密封注液孔122。这样的设置可以保证电池具有良好的密封性，防止注入的电解液经注液孔122漏出。
密封钉121和封口件125的均为金属材质，且优选为铝和铝合金材质，铝或铝合金材质具有导电性好，质地软，且在空气中较为稳定的特性，当本实用新型实施例提供的电池为锂离子电池时，将密封钉121和封口件125选用铝作为优选材质能够保证电池的工作性能。同时，壳体100的底壳110和盖体120优选为钢材，可以避免锂离子电池电池壳体100在高电位下发生水解反应，提高电池的稳定性。
其中，封口件125与密封钉121采用焊接的方式连接在一起，焊接方式采用电阻焊接、超声波焊接、激光焊接中的一种或多种，上述焊接方式无需使用焊材，避免因封口件125与密封钉121的焊接而加大电池的重量，降低电池的使用场景范围，影响电池的工作性能。
需要说明的是，封口件125的外周边缘形状可以是圆形，此时，圆形的圆心与注液孔122的中心重合；封口件125的外周边缘形状也可以是多边形，此时，多边形的中心与注液孔122的中心重合，且封口件125靠近注液孔122的一侧应完全覆盖注液孔122，以确保封口件125对注液孔122的密封效果。当然，封口件125的外边缘形状可以与注液孔122的外边缘形状可以相同，也可以不同，本实施例对此不做限制，只要保证封口件能够覆盖注液孔即可，本实用新型实施例提供的电池的整体结构示意图以及封口件的结构示意图可参照图1所示。
作为一种可实现的实施方式，封口件的中心与注液孔的中心位于盖体的中轴线上，本实施例通过设置注液孔位于盖体120的中心，经由注液孔122进入电池容置腔内的电解液可直接进入容置腔的中心，从而减小电池注液过程中注液针的工作时间，提高电池加工和制备的效率。
需要说明的是，注液孔122的外周缘的形状可以是圆形，此时，圆形的圆心与盖体120的中心重合。或者，注液孔122的外周缘也可以的多边形，此时，多边形的沿盖体120的中心对称分布。当然，注液孔122的外周缘也可以是非对称多边形，本实用新型实施例对注液孔的外周缘的形状不作限制。
作为一种可实现的实施方式，参照图3和图5所示，注液孔122的直径L1为0.5～3mm，通过设置注液孔122的直径L1的大小，可以在保证密封钉121强度的同时确保注液孔具有较快的注液速度。当注液孔122的直径L1小于0.5mm时，注液孔122的直径L1过小，电池注液速度较慢，影响电池的加工制造效率，当注液孔122的直径大于3mm时，注液孔122的直径过大，从而导致密封钉121的机械强度偏小，降低电池的稳定性和安全性。注液孔122的直径L1的值可根据实际加工需求或使用需求进行设置，本实用新型实施例对此不做限制。
进一步地，封口件125的外边缘与安装槽123的槽壁之间的距离L2为0～2mm，当L2的值为0时，封口件125与安装槽123的槽壁之间紧密连接。设置封口件125的外边缘与安装槽123的槽壁之间具有一定的距离便于封口件的装配与焊接，然而，当L2的值大于2mm时，封口件125与安装槽123的槽壁之间的距离过大，降低电池整体的美观性，且间隙处易 积聚灰尘，给电池应用中造成一定的风险。在具体的加工或应用中，封口件125的外边缘与安装槽123的槽壁之间的距离L2可根据用户的需求进行设置，本实用新型实施例对此不做限制。
进一步地，封钉121靠近底壳110的一侧与安装槽123的槽底之间的距离H1为0.1～2mm，设置H1的值大于0.1mm，能够保证密封钉121具有较高的强度，以实现密封电池模组200和电解液的功能，然而，H1的值也不能过大，当H1的值大于2mm时，密封钉121的厚度过大，增大了封口件125与密封钉121之间的焊接难度，影响封口件125与密封钉121的连接，从而降低电池的加工制备效率。
进一步地，安装槽123的槽深为0～1mm。当安装槽的槽深为0时，此时密封钉121上不设置安装槽，封口件125可直接焊接在密封钉远离电池模组200的一侧。或，封口件125也可以设置在安装槽123内，以提高电池加工的美观性。然而，安装槽123的槽深越大，密封钉121靠近电池模组200的一侧与安装槽123的槽底之间的厚度就越小，从而影响密封钉121的应用性能。为了保证密封钉121具有较好的性能，能够承受更大的作用力，安装槽123的槽深应小于或等于1mm。
作为一种可实现的实施方式，容置腔包括储液区域101和储芯区域，参照图1所示，电池模组200位于储芯区域中，壳体100上开设有注液孔122，注液孔122和储液区域101相对设置，且注液孔122和储液区域101连通。参照图2所示，电解液经注液孔122进入到容置腔之后，直接进入储液区域101，在重力的作用下，电解液直接到达电池壳体100的底部，然后浸润两侧的电池模组200。
为了确保电解液能够尽快的浸润电池模组200，并提高电池的稳定性，参照图3和图4所示，作为一种可实现的实施方式，储液区域101位于容置腔的中心，储液区域101的外周缘与壳体100的内壁面之间形成储芯区域。电池模组200的中轴线与壳体100的中轴线重合。电解液经注液孔122进入到容置腔后，储液区域101中的电解液沿容置腔的中心对称分布，然后电解液同时向两侧流动，电解液浸润电池模组200的两侧所需的时间大致相同。密封钉121靠近电池模组200的一侧与电池模组200之间的距离H2为0.1～3mm，设置H2的值大于0.1mm，能够为第一极耳203的安装提 供充足的空间，然而，H2的值也不能过大，当H2的值大于3mm时，由于电池模组200与密封钉121之间的间隙过大而造成电池的能量损失过大，影响电池的储电量和使用寿命。进一步地，位于壳体100外部的卡槽的槽壁的厚度H3为0～1mm。当H3的值为0时，即密封钉121和盖体120之间为不设置卡槽的情况。通过设置卡槽以实现盖体120与密封钉121之间的卡接，从而提高密封件124对电池的密封效果。当H3的值大于1mm时，加大了电池盖体120的整体厚度，加大了电池的重量，无法满足电池在微型电子器件和精密电子器件中的适用性。
参照图3-4所示，作为一种可实现的实施方式，电池模组200包括第一电极片201和第二电极片202，第一电极片201和第二电极片202交错且层叠设置，相邻的第一电极片201和第二电极片202之间设置有电性绝缘的隔膜205。第一电极片201上设置有第一极耳203，第一极耳203与密封钉121连接且电性导通，形成电池的第一电极；第二极片202上设置有第二极耳204，第二极耳204与壳体100连接且电性导通，形成电池的第二电极。隔膜205起到隔离第一电极片201和第二电极片202的作用，防止两个电极片相互接触而导致内部短路，当本实用新型实施例提供的电池为锂离子电池时，隔膜205可以是半透层，阻止体积比较大的分子通过，而只允许小体积的带电离子通过，可以提高正负电极附近的浓度差，有利于离子的扩散，从而提高电池的存储效率。
其中，第一电极片201和第二电极片202之间均涂覆有电池活性材料，作为优选，第一电极片201表面涂覆钴酸锂、镍钴锰酸锂、镍钴锰酸铝锂、镍钴铝酸锂、锰酸锂、磷酸铁锂、磷酸亚铁锂、中的一种或多种，第二电极片202表面涂覆石墨、硅碳、硅氧、钛酸锂、硬碳中的一种或多种，此时，第一电极片201为电池的正极片，第二电极片202为电池中的负极片，为了保证电池的安全性能，第二极片202的总面积应大于第一电极片201的总面积。
第一极耳203的一端与第一电极片201焊接，另一端与密封钉121焊接，从而实现第一电极片201与密封钉121的接通，电池的密封钉121所在的一侧为电池的第一电极，在优选实施方式中，第一电极为正极。参照图3所示，第二极耳204的一端与第二电极片202焊接，另一端与电池的 盖体120焊接，实现第二电极片202与电池盖体的接通，此时电池盖体120所在的位置为电池的第二电极。或者，参照图4所示，第二极耳204的一端与第二电极片202焊接，另一端与电池的底壳110焊接，实现第二电极片202与电池底壳110接通，此时电极底壳为电池的第二电极，在优选实施方式中，第二电极为负极。其中，第一极耳203与第一电极片201，第一极耳203与密封钉121，第二极耳204与第二电极片202，第二极耳204与盖体120，第二极耳204与底壳110之间的焊接方式采用电阻焊接、超声波焊接、激光焊接中的一种或多种。
此外，为了避免第一极耳203与盖体120或者底壳110之间出现搭接短路的情况，第一极耳203的外侧设置有极耳胶207，极耳胶207为电性绝缘件。
作为一种可实现的实施方式，容置腔的中部设置有中空的卷轴，电池模组200卷绕在卷轴上。卷轴的内部形成储液区域101，电池模组200的外壁面涂覆有绝缘胶206。
其中，第一电极片201，第二极片203，隔膜205通过卷绕的方式组合成本实用新型实施例中的电池模组200，这样的设置能够加大第一电极片201和第二电极片202的面积，从而提高电池容量。电池模组200采用卷绕设置的方式能够加大电解液与电池模组之间的浸润面积，以提高电池的工作性能。此外，电池模组200外部设置绝缘胶206能够防止第一电极片201，或者第二电极片与电池壳体200之间的搭接短路。
作为一种可实现的实施方式，参照图3-图4以及图6所示，第一极耳203和第二极耳204在卷轴的同侧，或者第一极耳203所在平面与第二极耳204所在平面具有夹角α，夹角α的范围为0°到180°，或者第一极耳203与第二极耳204通过弯折固定在电池模组200中，第一极耳203和第二极耳204的弯折角度的范围为45°到90°。
作为优选，夹角α的范围为90°到180°。这样的设置可以保持第一极耳203和第二极耳204之间的距离足够大，避免后续在电池的容置腔的布置中出现搭接短路的情况。
综上，本实用新型提供的电池，解决了相关技术中电池稳定性低，密封性差，安全性差的问题，通过将注液孔设置在密封钉上，并在密封钉上 开设安装槽，简化了电池的结构，减小了电池的体积，降低了电池的重量，通过设置盖体120与密封钉121卡接，并在卡接处设置密封件124，提高了密封性能，使电池适用于多种应用环境，提高了本实用新型实施例提供的电池的稳定性和安全性。
在本实用新型的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应作广义理解，例如，可以使固定连接，也可以是通过中间媒介间接相连，可以是两个元件内部的连通或者两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本实用新型中的具体含义。术语“上”、“下”、“前”、“后”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或者位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或者暗示所指的装置或者元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。在本实用新型的描述中，“多个”的含义是两个或两个以上，除非是另有精确具体地规定。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
最后应说明的是：以上各实施例仅用以说明本实用新型的技术方案，而非对其限制；尽管参照前述各实施例对本实用新型进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本实用新型各实施例技术方案的范围。

Claims (10)

  1. 一种电池，其特征在于，包括壳体，所述壳体为金属件，所述壳体包括底壳和盖体，所述盖体盖合在所述底壳的开口上；
    所述盖体包括安装孔，所述安装孔内设置有导电的密封钉，所述密封钉的侧周缘设置有卡槽，靠近所述安装孔处的所述盖体伸入所述卡槽中，并与所述卡槽卡固连接；
    所述卡槽和所述盖体的连接处设置有密封件，所述密封件为电性绝缘件。
  2. 根据权利要求1所述的电池，其特征在于，所述密封钉上开设有注液孔，所述注液孔位于所述盖体的中心；
    所述壳体内具有容置腔，所述注液孔与所述容置腔连通。
  3. 根据权利要求2所述的电池，其特征在于，所述密封钉远离所述底壳的一侧设置有安装槽，所述注液孔位于所述安装槽的槽底处；
    所述安装槽内设置有封口件，所述封口件的表面低于所述安装槽的槽口，所述封口件密封所述注液孔。
  4. 根据权利要求3所述的电池，其特征在于，所述封口件的中心，与所述注液孔的中心位于所述盖体的中轴线上。
  5. 根据权利要求4所述的电池，其特征在于，所述注液孔的直径为0.5～3mm，和/或，所述封口件的外边缘与所述安装槽的槽壁之间的距离为0～2mm，和/或，所述密封钉靠近所述底壳的一侧与所述安装槽的槽底之间的距离为0.1～2mm，和/或，所述安装槽的槽深为0～1mm。
  6. 根据权利要求2-5中任一项所述的电池，其特征在于，包括电池模组，所述电池模组位于所述容置腔内，所述电池模组的中轴线与所述壳体的中轴线重合；
    所述密封钉靠近所述电池模组的一侧与所述电池模组之间的距离为0.1～3mm，和/或，位于所述壳体外部的所述卡槽的槽壁厚度为0～1mm。
  7. 根据权利要求6所述的电池，其特征在于，所述容置腔包括储液区域和储芯区域，所述电池模组位于所述储芯区域中，所述注液孔与所述储液区域相对设置，且所述注液孔与所述储液区域连通。
  8. 根据权利要求7所述的电池，其特征在于，所述电池模组包括第一 电极片和第二电极片，所述第一电极片和第二电极片相互交错且层叠设置，相邻的所述第一电极片和所述第二电极片之间设置有电性绝缘的隔膜；
    所述第一电极片上设置有第一极耳，所述第一极耳与所述密封钉连接且电性导通，形成所述电池的第一电极；
    所述第二电极片上设置有第二极耳，所述第二极耳与所述壳体连接且电性导通，形成所述电池的第二电极。
  9. 根据权利要求8所述的电池，其特征在于，所述容置腔的中部设置有中空的卷轴，所述电池模组卷绕在所述卷轴上；
    所述卷轴的内部形成储液区域，所述电池模组的外壁面上涂覆有绝缘胶。
  10. 根据权利要求9所述的电池，其特征在于，所述第一极耳和所述第二极耳在所述卷轴的同侧；
    和/或，所述第一极耳所在平面与所述第二极耳的所在平面具有夹角，所述夹角的范围为0°～180°；
    和/或，所述第一极耳和所述第二极耳通过弯折固定在所述电池模组中，所述第一极耳和/或所述第二极耳的弯折角度的范围为45°～90°。
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