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CN-224232900-U - Battery cell

CN224232900UCN 224232900 UCN224232900 UCN 224232900UCN-224232900-U

Abstract

The application discloses a battery, which comprises a shell and a sealing rubber plug, wherein the shell is provided with a liquid injection hole, the sealing rubber plug is inserted into the liquid injection hole and seals the liquid injection hole, and the radial dimension of two ends of the sealing rubber plug is larger than the radial dimension of the middle of the sealing rubber plug along the inserting direction of the sealing rubber plug. The battery can improve the sealing effect of the liquid injection hole through the structural improvement of the sealing rubber plug of the liquid injection hole, and the use safety of the battery is guaranteed.

Inventors

  • XU PENGFEI
  • HUANG JIAXIN
  • FENG JINGJING
  • HE MINGHUA

Assignees

  • 中创新航技术研究院(江苏)有限公司
  • 中创新航科技集团股份有限公司

Dates

Publication Date
20260512
Application Date
20250421

Claims (10)

  1. 1. A battery is characterized by comprising a shell and a sealing rubber plug, wherein the shell is provided with a liquid injection hole, the sealing rubber plug is inserted into the liquid injection hole and seals the liquid injection hole, and the radial dimension of two ends of the sealing rubber plug is larger than the radial dimension of the middle of the sealing rubber plug along the inserting direction of the sealing rubber plug.
  2. 2. The battery of claim 1, wherein the sealing plug comprises a first sealing segment and a second sealing segment connected in series, the first sealing segment having a maximum radial dimension that is the same as a maximum radial dimension of the second sealing segment.
  3. 3. The battery according to claim 1, wherein the ratio of the maximum radial dimension of the sealing rubber plug to the radial dimension of the liquid injection hole is 1.05-1.2, and the radial dimension of the liquid injection hole is 2 mm-8 mm.
  4. 4. A battery according to any of claims 1-3, wherein the sealing plug comprises a first sealing section adjacent the interior of the housing, the radial dimension of the first sealing section increasing in a direction towards the interior of the housing.
  5. 5. The battery of claim 4, wherein the ratio of the maximum radial dimension of the first seal segment to the minimum radial dimension of the seal plug is 1.06-1.3.
  6. 6. A battery according to any one of claims 1-3, wherein a pressure relief structure is provided on the housing, the liquid injection hole and the pressure relief structure are provided on the same wall of the housing, the sealing rubber plug comprises a first sealing section close to the interior of the housing, and the ratio of the maximum radial dimension of the first sealing section to the thickness of the wall of the housing at the pressure relief structure is 1.2-16.
  7. 7. A battery according to any one of claims 1-3, wherein a pressure relief structure is provided on the housing, the liquid injection hole and the pressure relief structure are provided on the same wall of the housing, and the distance between the liquid injection hole and the pressure relief structure is 8 mm-16 mm.
  8. 8. A battery according to any one of claims 1 to 3, wherein the housing comprises a shell and a cover, the shell is of an open tubular structure, the cover seals the open end of the shell, the liquid injection hole is formed in the cover, the ratio of the maximum radial dimension of the sealing rubber plug to the radial dimension of the liquid injection hole is 1.1 to 1.3, and the radial dimension of the liquid injection hole is 2mm to 8mm.
  9. 9. A battery according to any one of claims 1 to 3, wherein the housing comprises a shell and a cover, the shell is of an open tubular structure, the cover seals the open end of the shell, the shell comprises a bottom wall opposite to the cover, the liquid injection hole is formed in the bottom wall, the ratio of the maximum radial dimension of the sealing rubber plug to the radial dimension of the liquid injection hole is 1.07-1.16, and the radial dimension of the liquid injection hole is 2 mm-8 mm.
  10. 10. A battery according to any one of claims 1 to 3, further comprising a sealing nut which covers a portion of the sealing rubber plug located in the housing, the sealing nut being fixedly connected to the housing.

Description

Battery cell Technical Field The application relates to the technical field of batteries, in particular to a battery. Background At present, the liquid injection hole of the battery is sealed by adopting a sealing nail cap and a sealing glue nail, and when in operation, the sealing glue nail is inserted into the liquid injection hole, and then the sealing nail cap is covered outside the sealing glue nail and is fixedly connected with a shell provided with the liquid injection hole. Although the sealing nail cap and the sealing glue nail can form certain sealing performance, no effective means can detect the sealing performance of the injection liquid Kong Zuizhong, for example, under the condition that the sealing glue nail forms sealing performance and the sealing of the sealing nail cap fails, the detection result can show that the sealing is effective, so that potential safety hazards exist in the battery. Disclosure of utility model The application aims to provide a battery, which can improve the sealing effect on a liquid injection hole and ensure the use safety of the battery through the structural improvement of a sealing rubber plug of the liquid injection hole. In order to solve the technical problems, the application provides a battery which comprises a shell and a sealing rubber plug, wherein the shell is provided with a liquid injection hole, the sealing rubber plug is inserted into the liquid injection hole and seals the liquid injection hole, and the radial dimension of two ends of the sealing rubber plug is larger than the radial dimension of the middle of the sealing rubber plug along the inserting direction of the sealing rubber plug. By adopting the scheme, the sealing rubber plug of the sealing liquid injection hole is designed into a gourd-shaped structure with large two ends and small middle, after the sealing rubber plug is inserted into the liquid injection hole, the sealing rubber plug is not easy to deviate from the liquid injection hole due to the large radial size of the two ends of the sealing rubber plug, the sealing effect on the liquid injection hole is good, and particularly when the pressure inside the battery is larger than the external pressure, the sealing rubber plug has a trend of outwards moving relative to the battery under the action of pressure difference, but the sealing rubber plug cannot deviate from the liquid injection hole due to the large radial size of the end part of the sealing rubber plug, and further better sealing performance is formed on the liquid injection hole. The structural design of the sealing rubber plug can improve the sealing effect on the liquid injection hole so as to ensure the use safety of the battery. Drawings Fig. 1 is a block diagram of a battery according to an embodiment of the present application; fig. 2 is a structural view of the battery shown in fig. 1 at another viewing angle; Fig. 3 is a partial structural view of a battery according to an embodiment of the present application; FIG. 4 is a partial block diagram of the housing of FIG. 3; FIG. 5 is a block diagram of the sealing plug of FIG. 3; Fig. 6 is a partial structural view of a battery according to another embodiment of the present application; FIG. 7 is a block diagram of the sealing plug of FIG. 6; fig. 8 is a block diagram of a sealing rubber plug in another embodiment provided by the application. Reference numerals illustrate: battery 10, first end 101, second end 102; a housing 11, a case 111, a case peripheral wall 1111, a case bottom wall 1112, and a cover 112; A liquid injection hole 12; a sealing rubber plug 13, a first sealing section 131, a second sealing section 132 and a head 133; Pressure relief structure 14. Detailed Description In order to better understand the aspects of the present application, the present application will be described in further detail with reference to the accompanying drawings and detailed description. The use of the first, second, etc. ordinal numbers herein are used to distinguish between different components of the same name, and do not indicate a particular order or a major-minor relationship, etc. Referring to fig. 1 to 5, fig. 1 is a structural diagram of a battery according to an embodiment of the present application, fig. 2 is a structural diagram of the battery shown in fig. 1 at another viewing angle fig. 3 is a partial structural diagram of the battery according to an embodiment of the present application, fig. 4 is a partial structural diagram of a housing of fig. 3, and fig. 5 is a structural diagram of a sealing rubber plug of fig. 3. The present embodiment provides a battery 10, which is exemplified as a cylindrical battery in the drawings without losing generality, the battery 10 including a case 11, and a winding core (not shown in the drawings) provided inside the case 11. The casing 11 has a liquid injection hole 12, and the liquid injection hole 12 is used for injecting electrolyte into the casing 11 during the man