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CN-224232856-U - Battery cell

CN224232856UCN 224232856 UCN224232856 UCN 224232856UCN-224232856-U

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery which comprises a shell, an explosion-proof valve protection sheet and an explosion-proof valve. The shell is provided with a mounting hole and a first liquid injection hole. The explosion-proof valve protection piece sets up in the one side that the shell deviates from the accommodation chamber, and the explosion-proof valve protection piece includes base member and glue film, and the glue film setting is close to one side of shell and is connected base member and shell at the base member, makes base member and shell fixed through the glue film. One side of the matrix, which is far away from the first liquid injection hole, is provided with a first avoiding edge, and a circulation port is formed between the first avoiding edge and the inner wall of the mounting hole. The explosion-proof valve is connected to one side of the shell, which is away from the explosion-proof valve protection sheet. When the explosion-proof valve is opened, a pressure relief channel is formed, and the pressure relief channel is sequentially communicated with the mounting hole and the circulation port. Due to the existence of the circulation port, the high accuracy of the explosion-proof valve during helium detection can be ensured. The glue film has the sign portion for after explosion-proof valve protection piece installs the shell, can detect directly perceivedly and judge, avoid appearing the condition that explosion-proof valve protection piece neglected loading.

Inventors

  • LI JINCHENG
  • DING RUOYU
  • ZHOU JIE

Assignees

  • 蜂巢能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250509

Claims (10)

  1. 1. A battery, comprising: The shell is hollow to form a containing cavity, a mounting hole and a first liquid injection hole are formed in the shell, and the first liquid injection hole is formed in one side of the mounting hole along a first direction; The explosion-proof valve protection sheet is arranged on one side of the shell, which is away from the accommodating cavity, and comprises a base body and an adhesive layer, wherein the adhesive layer is arranged on one side of the base body, which is close to the shell, and is used for connecting the base body with the shell; The explosion-proof valve is connected to one side of the shell, which is away from the protection sheet of the explosion-proof valve, and a pressure relief channel is formed when the explosion-proof valve is opened, and the pressure relief channel is communicated with the mounting hole and the circulation port in sequence.
  2. 2. The battery of claim 1, wherein the adhesive layer comprises two straight line segments and two arc segments, the two straight line segments are oppositely arranged along the second direction, the two arc segments are oppositely arranged along the first direction, the outer peripheral wall of the arc segment, far away from the first liquid injection hole, of the two arc segments is provided with a second avoiding edge, and the second avoiding edge, the first avoiding edge and the inner wall of the mounting hole jointly enclose the circulation port.
  3. 3. The battery of claim 2, wherein the first and second relief edges are spaced from the inner perimeter wall of the arcuate segment by a distance b in a first direction; the value range of b is that b is more than or equal to 0.1mm and less than or equal to 3.0mm.
  4. 4. The battery of claim 2, wherein in a first direction, the first and second relief edges are spaced from an inner wall of the mounting hole by a distance e; the value range of e is that e is more than or equal to 0.1mm and less than or equal to 2.0mm.
  5. 5. The battery according to claim 2, wherein a distance between an outer peripheral wall of the arc-shaped section adjacent to the first liquid injection hole of the two arc-shaped sections and an outer peripheral wall of the base body in the first direction is a; the value range of a is more than or equal to 0mm and less than or equal to 1.0mm.
  6. 6. The battery of claim 2, wherein the width of the bonding surface between the arcuate segment of the two arcuate segments adjacent to the first liquid injection hole and the housing in the first direction is c; the value range of c is that c is more than or equal to 0.5mm and less than or equal to 2.5mm.
  7. 7. The battery of claim 4, wherein the width of the arcuate segment of the two arcuate segments proximate the first fill port in the first direction is t1; the value range of t1 is that t1 is more than or equal to 0.8mm and less than or equal to 3.0mm; and/or, along the second direction, the width of the straight line segment is t2, t1=t2.
  8. 8. The battery of claim 1, wherein in a third direction, the thickness of the substrate is h1 and the thickness of the glue layer is h2; the value range of h1 is that h1 is more than or equal to 0.1mm and less than or equal to 1.0mm; the value range of h2 is that h2 is more than or equal to 0.02mm and less than or equal to 0.5mm.
  9. 9. The battery according to claim 1, wherein the base body is made of a transparent material, and the identification portion is an identification color of the adhesive layer itself.
  10. 10. The battery of claim 1, wherein the housing comprises a cover plate and a shell, the cover plate is connected with the shell and encloses the accommodating cavity, and one of the side walls of the cover plate or the shell is provided with the mounting hole and the first liquid injection hole.

Description

Battery cell Technical Field The utility model relates to the technical field of batteries, in particular to a battery. Background With the increasing maturity of lithium ion battery technology, lithium ion batteries are widely used as power batteries in the fields of electric automobiles and energy storage. The traditional lithium battery structure comprises a cover plate, a shell and a pole group, wherein the cover plate and the shell are welded and sealed to encapsulate the pole group inside, a liquid injection hole, a blast hole and an explosion-proof valve are arranged on the cover plate, and electrolyte is injected into the shell through the liquid injection hole. The blast hole sets up in the one side of annotating the liquid hole, and explosion-proof valve sets up in the blast hole for pressure release when thermal runaway. An explosion-proof valve protection sheet is arranged above the explosion-proof valve and is used for protecting the explosion-proof valve from direct mechanical impact. The explosion-proof valve protection sheet is provided with a notch to ensure the accuracy of helium detection. However, in the assembly process of the battery, the condition that the explosion-proof valve protection sheet is not installed exists, so that electrolyte flows to the explosion-proof valve from the explosion hole, the explosion-proof valve is corroded and fails in the air, and the electrolyte on the explosion-proof valve is difficult to clean. Disclosure of utility model The utility model aims to provide a battery, which can avoid the condition that an explosion-proof valve protection sheet is not installed, so that the explosion-proof valve is prevented from being corroded by electrolyte, the explosion-proof valve is well protected, and the high helium detection accuracy of the explosion-proof valve is ensured. In order to achieve the above purpose, the utility model adopts the following technical scheme: The present utility model provides a battery comprising: The shell is hollow to form a containing cavity, a mounting hole and a first liquid injection hole are formed in the shell, and the first liquid injection hole is formed in one side of the mounting hole along a first direction; The explosion-proof valve protection sheet is arranged on one side of the shell, which is away from the accommodating cavity, and comprises a base body and an adhesive layer, wherein the adhesive layer is arranged on one side of the base body, which is close to the shell, and is used for connecting the base body with the shell; The explosion-proof valve is connected to one side of the shell, which is away from the protection sheet of the explosion-proof valve, and a pressure relief channel is formed when the explosion-proof valve is opened, and the pressure relief channel is communicated with the mounting hole and the circulation port in sequence. Optionally, the glue film includes two straightway and two arc sections, two straightway sets up along the second direction relatively, two the arc section sets up along first direction relatively, two keep away from in the arc section the outer perisporium of arc section of first notes liquid hole is equipped with the second and dodges the limit, the second dodges the limit first dodges the limit with the inner wall of mounting hole encloses jointly and becomes the circulation mouth. Optionally, along the first direction, the distances between the first avoiding edge, the second avoiding edge and the inner peripheral wall of the arc-shaped section are b, and the value range of b is more than or equal to 0.1mm and less than or equal to 3.0mm. Optionally, along the first direction, the distance between the first avoiding edge, the second avoiding edge and the inner wall of the mounting hole is e, and the value range of e is more than or equal to 0.1mm and less than or equal to 2.0mm. Optionally, in the first direction, a distance between an outer peripheral wall of the arc-shaped section, which is close to the first liquid injection hole, of the two arc-shaped sections and an outer peripheral wall of the base body is a; the value range of a is more than or equal to 0mm and less than or equal to 1.0mm. Optionally, along the first direction, the width of the bonding surface between the arc-shaped sections, which are close to the first liquid injection hole, of the two arc-shaped sections and the shell is c, and the value range of c is more than or equal to 0.5mm and less than or equal to 2.5mm. Optionally, along a first direction, the width of the arc section close to the first liquid injection hole in the two arc sections is t1, and the value range of t1 is 0.8 mm-3.0 mm; and/or, along the second direction, the width of the straight line segment is t2, t1=t2. Optionally, along the third direction, the thickness of the substrate is h1, and the thickness of the adhesive layer is h2; the value range of h1 is that h1 is more than or equal to 0.1mm and less than or equal to 1.0mm; th