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CN-224204181-U - Combined battery metal shell and battery using same

CN224204181UCN 224204181 UCN224204181 UCN 224204181UCN-224204181-U

Abstract

The utility model relates to a combined battery metal shell and a battery using the same, belonging to the field of batteries, and comprising a hollow cylindrical shell body, wherein an installation space is formed in the shell body, the shell body is formed by splicing a first shell and a second shell, the first shell comprises a first sleeve and a first bottom plate, and the second shell comprises a second sleeve and a second bottom plate; the first bottom plate and the second bottom plate are respectively provided with a positive pole post and a negative pole post which are in sealing fit with the first bottom plate and the second bottom plate through riveting pieces, the first bottom plate and/or the second bottom plate are/is also provided with a second mounting hole which penetrates through the first bottom plate and the second bottom plate, and an explosion-proof valve which is in sealing fit with the second mounting hole is arranged at the second mounting hole. The utility model can reduce the probability of quality problems of the battery shell in the production process, ensure the quality of the battery shell and reduce the production cost of the battery shell.

Inventors

  • LI TONGJIE
  • YANG WEINIAN

Assignees

  • 惠州市中达峰新能源科技有限公司

Dates

Publication Date
20260505
Application Date
20250313

Claims (8)

  1. 1. A combined battery metal shell comprises a hollow cylindrical shell body, wherein an installation space is formed in the shell body, the combined battery metal shell is characterized in that the shell body is formed by combining a first shell body and a second shell body which are integrally formed, the first shell body comprises a first cylindrical sleeve, a first bottom plate which is arranged at one end of the first sleeve and is in sealing fit with the first sleeve, the second shell body comprises a second cylindrical sleeve, and a second bottom plate which is arranged at one end of the second sleeve and is in sealing fit with the second sleeve, the second sleeve and the first sleeve have the same outer diameter and inner diameter, one end of the second shell body far away from the second bottom plate and one end of the first shell body far away from the first bottom plate are fixedly connected in sealing fit, the second sleeve and the axis of the first sleeve are positioned in the same straight line, first bottom plates and second bottom plates are respectively provided with first installation holes penetrating through the first bottom plates and the second bottom plates, and second bottom plates are respectively provided with second bottom plate installation holes penetrating through positive pole and second bottom plate installation posts and/cathode pole installation holes respectively penetrating through the first bottom plate installation posts and the second bottom plate installation posts.
  2. 2. The metal casing of claim 1, wherein an end of the second housing remote from the second base plate and an end of the first housing remote from the first base plate are welded together in abutting engagement with each other.
  3. 3. The combined battery metal shell according to claim 1 or 2 is characterized in that the positive electrode post and the negative electrode are cylindrical and have the same diameter and height, a liquid injection hole penetrating through the positive electrode post is formed in the axial direction of the positive electrode post, a plug used for sealing the liquid injection hole is embedded in the liquid injection hole, the riveting piece comprises a columnar inserting portion, one end of the inserting portion extends outwards to form a platy abutting plate, the riveting piece further comprises an insulating sleeve, the insulating sleeve comprises an annular lantern ring embedded in the first mounting hole, the lantern ring is tightly matched with the first mounting hole, two ends of the lantern ring are respectively outwards fitted on the inner side surface and the outer side surface of the bottom plate, an insulating baffle plate is formed, the inserting portion is embedded in the lantern ring and is tightly matched with the lantern ring, a mounting groove is formed in the side face of the inserting portion, the mounting groove surrounds the inserting portion, the mounting groove is internally provided with a sealing ring, the sealing ring is embedded in the bottom plate and is embedded in the bottom plate, the sealing ring is embedded in the bottom plate, and the bottom plate is axially matched with the bottom plate, and the bottom plate is embedded in the cylindrical post, and the bottom plate is embedded in the cylindrical bottom plate, and the cylindrical bottom plate is respectively, and the cylindrical sealing ring is embedded in the bottom plate is sealed in the bottom plate, and the cylindrical bottom plate is embedded in the cylindrical bottom plate.
  4. 4. A combined battery metal casing according to claim 3, wherein the liquid injection hole on the positive electrode post is outwards expanded away from one end of the installation space to form a sealing hole, a sealing nail is fixedly arranged in the sealing hole, and the sealing nail is mutually abutted with the plug.
  5. 5. The assembled battery metal casing as in claim 4, wherein the thickness of the first sleeve and the second sleeve is 0.2-5mm, the diameter of the first sleeve and the second sleeve is 20-300mm, and the height of the first sleeve and the second sleeve is 50-300mm.
  6. 6. The metal casing of claim 5, wherein the insulating sealing ring is an O-ring made of ethylene propylene diene monomer rubber, and the insulating sleeve is made of polytetrafluoroethylene.
  7. 7. A battery characterized in that the battery metal casing according to any one of claims 1 to 6 is used.
  8. 8. The battery of claim 7, comprising a cylindrical battery cell, wherein the battery cell is formed by winding a positive plate, a diaphragm and a negative plate which are sequentially stacked, the edge of the positive plate in the battery cell extends towards one end of the battery cell and extends out of the battery cell to form a positive electrode welding end, the edge of the negative plate in the battery cell extends towards the other end of the battery cell and extends out of the battery cell to form a negative electrode welding end, the battery cell is embedded in an installation space of the shell body, the positive electrode welding end and the negative electrode welding end of the battery cell are respectively welded with a positive electrode current collecting disc and a negative electrode current collecting disc, and the positive electrode current collecting disc and the negative electrode current collecting disc are respectively welded with one ends of the positive electrode post and the negative electrode post extending into the installation space.

Description

Combined battery metal shell and battery using same Technical Field The utility model relates to the field of batteries, in particular to a combined battery metal shell and a battery using the same. Background Cylindrical batteries are batteries having a cylindrical shape, and are commonly found in various battery types such as lithium batteries and sodium batteries. Such batteries are widely used because of their simple structure, large size, and convenience for mass production. The outer casing of a cylindrical lithium battery is typically made of metal, such as steel and aluminum, and its primary function is to protect the components inside the battery and to provide a sealed environment for the inside of the battery. The production of battery cases is now generally done using a drawing process in which the greater the depth of drawing, the more difficult the quality of the drawn piece is to be ensured, for example 1, if the drawing depth is increased, this problem may be more pronounced if the drawing pressure is controlled improperly, which may lead to buckling of the sheet material, especially at greater depths, 2, if the depth is increased, the thickness of the metal may be gradually reduced, especially in the bottom region, if the uniformity during drawing is insufficient, which may lead to excessive thinning of the bottom and even penetration, 3, if the depth is increased, the cold work hardening effect of the metal material may become more pronounced, which may lead to a reduction in the plasticity of the material, which may lead to a further difficulty in the subsequent forming, which increases the risk of cracking during drawing. Based on the above, the utility model provides the combined battery metal shell and the battery using the same, and the battery shell is of a split structure, so that the deep drawing depth required in the production process of the shell can be greatly reduced, the probability of quality problems of the battery shell in the production process can be reduced, the quality of the battery shell is ensured, and meanwhile, the production difficulty of the battery shell is reduced, so that the production cost of the battery shell can be effectively reduced. Disclosure of utility model Based on the above, it is necessary to provide a metal casing of a combined battery, including a hollow cylindrical casing body, in which an installation space is formed, the casing body is formed by integrally forming a first casing and an integrally forming second casing, the first casing includes a first sleeve having a cylindrical shape, a first bottom plate disposed at one end of the first sleeve and in sealing engagement with the first sleeve, the second casing includes a second sleeve having a cylindrical shape, and a second bottom plate disposed at one end of the second sleeve and in sealing engagement with the second sleeve; the second sleeve and the first sleeve have the same outer diameter and inner diameter, one end of the second shell, which is far away from the second bottom plate, is fixedly connected with one end of the first shell, which is far away from the first bottom plate, in a mutually sealing fit manner, the second sleeve and the axis of the first sleeve are positioned in the same straight line, first mounting holes penetrating through the first mounting holes are formed in the middle positions of the first bottom plate and the second bottom plate, a positive pole post and a negative pole post which are in sealing fit with the first bottom plate and the first mounting holes of the second bottom plate are respectively mounted through riveting pieces, the positive pole post and the negative pole post extend into the mounting space, second mounting holes penetrating through the first bottom plate and/or the second bottom plate are further formed in the second bottom plate, and explosion-proof valves in sealing fit with the second mounting holes are mounted on the second mounting holes. In the utility model, the shell body is used for the shells of the cylindrical lithium battery and the cylindrical sodium battery, and is formed by splicing the first shell and the second shell, and the installation space formed in the shell body is used for accommodating the battery core of the lithium battery or the sodium battery. The positive pole post and the negative pole post are arranged at two ends of the shell body through riveting pieces and are used for being connected with the positive pole piece and the negative pole piece of the battery cell, so that the conduction between the positive pole post and the negative pole post and the battery cell is realized. Wherein, install the explosion-proof valve of second mounting hole department can select prior art's explosion-proof valve for the shell body that is has explosion-proof effect. In the utility model, the first shell and the second shell are integrally formed through a drawing process, and the shell body with higher height is for