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CN-224217494-U - Battery and battery pack

CN224217494UCN 224217494 UCN224217494 UCN 224217494UCN-224217494-U

Abstract

The utility model relates to the technical field of batteries and discloses a battery and a battery pack, wherein the battery is provided with a first direction, the battery comprises a shell, a first protection sheet and an explosion-proof valve, the shell is provided with a first accommodating cavity, the shell comprises a first wall, the first wall is provided with an explosion-proof hole which extends along the first direction and is communicated with the first accommodating cavity, the explosion-proof hole is provided with a first protection sheet and the explosion-proof valve, the first protection sheet is attached to one side of the first wall, which faces the first accommodating cavity, and covers the explosion-proof hole, the explosion-proof valve is arranged in the explosion-proof hole and covers the explosion-proof hole, and the first protection sheet and the explosion-proof hole are oppositely arranged along the first direction. The explosion-proof valve separates the explosion-proof hole into a first hole section close to the first accommodating cavity and a second hole section far away from the first accommodating cavity, and a pressure guide structure communicated with the first accommodating cavity and the first hole section is arranged on the first wall and/or the first protection sheet. The first protection piece can play the effect of protection explosion-proof valve, and lead the pressure structure and can avoid the existence of first protection piece to influence the timely rupture of explosion-proof valve.

Inventors

  • HU MINGJIANG
  • QIN JISHENG
  • YANG WEI
  • Hou Zhanrui

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250528

Claims (11)

  1. 1. A battery having a first direction (X), characterized by comprising a housing (1), a first protection sheet (12) and an explosion-proof valve (13), wherein the housing (1) has a first accommodation chamber (100), the housing (1) comprises a first wall (11), the first wall (11) is provided with an explosion-proof hole (111) extending along the first direction (X) and communicating with the first accommodation chamber (100), the first protection sheet (12) is attached to one side of the first wall (11) facing the first accommodation chamber (100) and covers the explosion-proof hole (111), the explosion-proof valve (13) is arranged in the explosion-proof hole (111) and covers the explosion-proof hole (111), and the first protection sheet (12) and the explosion-proof hole (111) are arranged opposite to each other along the first direction (X); The explosion-proof valve (13) divides the explosion-proof hole (111) into a first hole section (1111) close to the first accommodating cavity (100) and a second hole section (1112) far away from the first accommodating cavity (100), and the first wall (11) and/or the first protection sheet (12) are provided with a pressure guide structure which is communicated with the first accommodating cavity (100) and the first hole section (1111).
  2. 2. The battery according to claim 1, wherein the pressure guiding structure is arranged on the first wall (11), the pressure guiding structure arranged on the first wall (11) is a pressure guiding groove (112), the pressure guiding groove (112) is arranged on one side of the first wall (11) facing the first accommodating cavity (100), and the pressure guiding groove (112) is partially positioned between the first protection sheet (12) and the first wall (11) and partially exposed out of the first protection sheet (12).
  3. 3. The battery according to claim 2, wherein the pressure guide grooves (112) are provided in plurality, and the plurality of pressure guide grooves (112) are provided at intervals along the circumferential direction of the first hole section (1111).
  4. 4. A battery according to any one of claims 1-3, wherein the first protective sheet (12) is provided with the pressure guiding structure, the pressure guiding structure provided on the first protective sheet (12) is a pressure guiding score (121), and the pressure guiding score (121) penetrates the first protective sheet (12) along the first direction (X) and is provided opposite to the first hole section (1111).
  5. 5. The battery of claim 4, wherein the pressure guiding score (121) comprises a first pressure guiding score (1211) and a second pressure guiding score (1212), the first pressure guiding score (1211) and the second pressure guiding score (1212) being disposed crosswise.
  6. 6. The battery according to claim 4, wherein the pressure guiding score (121) is circular, polygonal or arc-shaped.
  7. 7. The battery according to claim 1, further comprising a second protection sheet (14), wherein the second protection sheet (14) is attached to a side of the first wall (11) facing away from the first accommodating cavity (100) and covers the second hole section (1112), the explosion-proof valve (13) is disposed between the first protection sheet (12) and the second protection sheet (14), and the first protection sheet (12) and the second protection sheet (14) are both disposed at intervals with the explosion-proof valve (13).
  8. 8. The battery according to claim 7, characterized in that a side of the first wall (11) facing away from the first receiving cavity (100) is provided with a first groove (113) surrounding the second hole section (1112), and the second protective sheet (14) is arranged in the first groove (113) and is attached to the bottom of the first groove (113).
  9. 9. The battery according to claim 8, characterized in that the bottom of the first groove (113) is provided with a second groove (114) surrounding the explosion-proof hole (111), and the explosion-proof valve (13) is arranged in the second groove (114) and is attached to the bottom of the second groove (114).
  10. 10. The battery according to claim 9, wherein the second groove (114) is a stepped groove, the second groove (114) has a first open groove (1141) near the first groove (113) and a second open groove (1142) away from the first groove (113), and the explosion-proof valve (13) is disposed in the second open groove (1142).
  11. 11. A battery pack characterized by comprising a case (10), a partition plate (20), and a battery pack (30), the battery pack (30) comprising a plurality of the batteries according to any one of claims 1 to 10; A second accommodating cavity (101) is formed in the box body (10), the partition plate (20) is arranged in the second accommodating cavity (101) and divides the second accommodating cavity (101) into a battery accommodating cavity (1011) and an exhaust space (1012), a plurality of exhaust through holes (201) which are arranged in an array are formed in the partition plate (20), and the exhaust through holes (201) are communicated with the battery accommodating cavity (1011) and the exhaust space (1012); The battery pack (30) is arranged in the battery accommodating cavity (1011), the second hole section (1112) is arranged corresponding to the exhaust through hole (201), and the orthographic projection of the explosion-proof valve (13) on the partition plate (20) is positioned in the corresponding exhaust through hole (201) along the first direction (X).

Description

Battery and battery pack Technical Field The utility model relates to the technical field of batteries, in particular to a battery and a battery pack. Background With the development and application of battery technology, the requirements on the safety performance and the stability of batteries are higher and higher. One of the main factors determining the safety performance of the battery is the safety and reliability of the battery explosion-proof valve. In the existing explosion-proof valve underlying technology, the explosion stability of the explosion-proof valve has a large uncertain factor, and the main reason is that the electrolyte flowing impact is at risk of influencing the form of the explosion-proof valve when the battery is injected, and the explosion-proof valve with the influenced form is at risk of being broken in advance when the battery is not in thermal runaway or being difficult to be broken normally when the battery is in thermal runaway. Therefore, a battery and a battery pack are needed to solve the above problems. Disclosure of utility model The utility model aims to provide a battery and a battery pack, which avoid the risk that an explosion-proof valve breaks in advance when the battery is not in thermal runaway or is difficult to break normally when the battery is in thermal runaway. To achieve the purpose, the utility model adopts the following technical scheme: A battery, has a first direction, includes casing, first protection piece and explosion-proof valve, the casing has first chamber that holds, the casing includes first wall, first wall is provided with along first direction extension and intercommunication first explosion-proof hole that holds the chamber, the explosion-proof hole is provided with first protection piece and explosion-proof valve, first protection piece attached to first wall orientation first side that holds the chamber, and cover explosion-proof hole, explosion-proof valve set up in explosion-proof hole and cover explosion-proof hole, first protection piece with explosion-proof hole is along first direction relative setting; The explosion-proof valve separates the explosion-proof hole into a first hole section close to the first accommodating cavity and a second hole section far away from the first accommodating cavity, and the first wall and/or the first protection sheet is provided with a pressure guide structure communicated with the first accommodating cavity and the first hole section. As an improvement of the above technical solution, the first wall is provided with the pressure guiding structure, the pressure guiding structure disposed on the first wall is a pressure guiding groove, the pressure guiding groove is disposed on a side of the first wall facing the first accommodating cavity, and the pressure guiding groove is partially disposed between the first protection sheet and the first wall, and partially exposed from the first protection sheet. As an improvement of the above technical solution, the pressure guiding grooves are provided with a plurality of pressure guiding grooves, and the plurality of pressure guiding grooves are arranged at intervals along the circumferential direction of the first hole section. As an improvement of the technical scheme, the first protection sheet is provided with the pressure guiding structure, the pressure guiding structure arranged on the first protection sheet is a pressure guiding notch, and the pressure guiding notch penetrates through the first protection sheet along the first direction and is opposite to the first hole section. As an improvement of the above technical scheme, the pressure guiding notch comprises a first pressure guiding notch and a second pressure guiding notch, and the first pressure guiding notch and the second pressure guiding notch are arranged in a crossing manner. As an improvement of the technical scheme, the pressure guiding nick is round, polygonal or arc-shaped. As the improvement of above-mentioned technical scheme, the battery still includes the second protection piece, the second protection piece attached in first wall deviates from one side of first holding chamber, and covers the second hole section, explosion-proof valve set up in between the first protection piece with the second protection piece, just first protection piece with the second protection piece all with explosion-proof valve interval sets up. As an improvement of the above technical scheme, a first groove surrounding the second hole section is formed in one side of the first wall facing away from the first accommodating cavity, and the second protection sheet is arranged in the first groove and is attached to the bottom of the first groove. As an improvement of the technical scheme, the bottom of the first groove is provided with a second groove surrounding the explosion-proof hole, and the explosion-proof valve is arranged in the second groove and is attached to the bottom of the second groove. As an im