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US-12620639-B2 - Adapter, testing apparatus, battery cell, battery, and electric apparatus

US12620639B2US 12620639 B2US12620639 B2US 12620639B2US-12620639-B2

Abstract

An adapter includes an adapting body and a valve body. The adapting body has a first mating portion and a second mating portion, where the first mating portion is configured to mate with an injection opening of a battery cell, the second mating portion is configured to mate with a gas detection apparatus, and a gas flow passage is constructed within an adapting body. The gas flow passage runs through the first mating portion and the second mating portion, and is configured for gas to flow from the injection opening to the gas detection apparatus.

Inventors

  • Rongji ZHANG
  • Bin Cao

Assignees

  • CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Dates

Publication Date
20260505
Application Date
20230714
Priority Date
20220402

Claims (20)

  1. 1 . An adapter, comprising: an adapting body having a first mating portion and a second mating portion, wherein the first mating portion is configured to mate with an injection opening of a battery cell, the second mating portion is configured to mate with a gas detection apparatus, and a gas flow passage is constructed within the adapting body, the gas flow passage running through the first mating portion and the second mating portion and being configured for gas to flow from the injection opening to the gas detection apparatus; and a valve body constructed to be movably disposed on the adapting body and movable relative to the adapting body when controlled to switch between states of turning on and off the gas flow passage; wherein the gas flow passage comprises a first passage and a second passage, the first passage runs through the first mating portion, and the second passage runs through the second mating portion.
  2. 2 . The adapter according to claim 1 , wherein: the gas flow passage further comprises a mounting cavity wherein, the mounting cavity connects the first passage and the second passage; and the valve body is at least partially disposed in the mounting cavity and is constructed to be capable of switching between an off state and an on state when moving relative to the mounting cavity, wherein the valve body in the off state blocks the first passage and/or the second passage and the valve body in the on state is away from both the first passage and the second passage.
  3. 3 . The adapter according to claim 2 , wherein: the first passage and the second passage run through two intersecting inner walls of the mounting cavity, respectively; and the valve body is constructed to be movable relative to the mounting cavity when controlled, with one of the two inner walls located in a moving direction of the valve body and the other spaced apart from the valve body.
  4. 4 . The adapter according to claim 3 , further comprising: a sealing member, wherein the sealing member is disposed in the mounting cavity, and the sealing member is capable of hermetically connecting the valve body with the inner wall in the moving direction of the valve body.
  5. 5 . The adapter according to claim 1 , wherein the gas flow passage comprises a mounting hole, wherein the mounting hole is formed in the second mating portion, and the mounting hole is configured to be sleeved around the gas detection apparatus.
  6. 6 . The adapter according to claim 5 , wherein the second mating portion is provided with an engaging member, the engaging member has an engaging hole, the engaging hole is coaxially connected to the mounting hole, and the engaging hole is constructed to be capable of being sleeved around the gas detection apparatus.
  7. 7 . The adapter according to claim 6 , wherein the engaging member is constructed to be capable of being extruded by the gas detection apparatus in the engaging hole to allow elastic deformation in a radial direction of the engaging hole to clamp the gas detection apparatus.
  8. 8 . The adapter according to claim 7 , wherein the engaging member comprises a clamp, wherein the clamp is enclosed to form the engaging hole, the clamp is hermetically connected to the second mating portion, an axial end of the clamp extends into the mounting hole, and a first elastic arm is provided on an end portion of the axial end, the first elastic arm being capable of undergoing elastic deformation in a radial direction of the engaging hole.
  9. 9 . The adapter according to claim 8 , wherein the engaging member further comprises an expansion sleeve, wherein the expansion sleeve is constructed to be capable of being movably sleeved in the engaging hole in an axial direction of the engaging hole, the expansion sleeve has a mating hole, the mating hole is coaxially disposed with the engaging hole, the mating hole is configured to mate with the gas detection apparatus, and the first elastic arm is squeezed at a position in a movement path of the expansion sleeve.
  10. 10 . The adapter according to claim 5 , further comprising: a sealing member, the sealing member is disposed in the mounting hole, and the sealing member is configured to be capable of hermetically connecting the gas detection apparatus and the gas flow passage.
  11. 11 . The adapter according to claim 10 , wherein the gas flow passage further comprises an intermediate hole, the intermediate hole is formed in the second mating portion, the intermediate hole is coaxially connected to the mounting hole, the mounting hole has an inner side wall, the intermediate hole runs through the inner side wall, and the sealing member is disposed in the inner side wall and provided around the intermediate hole.
  12. 12 . The adapter according to claim 1 , wherein the first mating portion is removably connected to the injection opening.
  13. 13 . The adapter according to claim 12 , wherein the first mating portion is threadedly connected to the injection opening.
  14. 14 . The adapter according to claim 12 , further comprising: a sealing member, the sealing member being configured to hermetically connect the first mating portion and the injection opening.
  15. 15 . A testing apparatus, comprising: the adapter according to claim 1 ; and a gas detection apparatus, comprising a connection tube and a detector that are connected, wherein the connection tube is configured to mate with the second mating portion, the detector is configured to obtain characteristic information about gas flowing through the connection tube, and the characteristic information comprises gas pressure information and/or gas composition information.
  16. 16 . The testing apparatus according to claim 15 , wherein grease is adhered to a wall of the connection tube.
  17. 17 . A battery cell, comprising: a housing; and the adapter according to claim 1 ; wherein the housing has an injection opening, and the first mating portion is mated to the injection opening.
  18. 18 . The battery cell according to claim 17 , further comprising: a sealing nail; wherein one of the first mating portion and the sealing nail is threadedly connected to the injection opening.
  19. 19 . A battery, comprising the battery cell according to claim 17 .
  20. 20 . An electric apparatus, comprising the battery according to claim 19 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2023/082213, filed on Mar. 17, 2023, which claims priority to Chinese Patent Application No. CN202220773221.2, filed on Apr. 2, 2022 and entitled “ADAPTER, TESTING APPARATUS, BATTERY CELL, BATTERY, AND ELECTRIC APPARATUS”, which are incorporated herein by reference in their entirety. TECHNICAL FIELD This application relates to the field of battery testing technologies, and in particular, to an adapter, a testing apparatus, a battery cell, a battery, and an electric apparatus. BACKGROUND In related technologies, a solution for testing an internal pressure of a battery cell is to seal and weld an adapter at an injection opening of the battery cell, and use the adapter to connect the injection opening and a sensor. During testing, gas generated inside the battery cell is collected by the sensor through the adapter, and then a detection result is obtained through the sensor. In this technology, the battery cell needs to be installed with both the adapter and the sensor during transportation of the battery cell for testing, resulting in inconvenience in transporting the battery cell. SUMMARY In view of the above problems, this application provides an adapter, a testing apparatus, a battery cell, a battery, and an electric apparatus, so as to solve the problem that a battery cell needs to be installed with both an adapter and a sensor during transportation of the battery cell for testing, resulting in inconvenience in transporting the battery cell. According to a first aspect, this application provides an adapter, including an adapting body and a valve body. The adapting body has a first mating portion and a second mating portion, where the first mating portion is configured to mate with an injection opening of a battery cell, the second mating portion is configured to mate with a gas detection apparatus, and a gas flow passage is constructed within the adapting body, the gas flow passage running through the first mating portion and the second mating portion and being configured for gas to flow from the injection opening to the gas detection apparatus. The valve body is constructed to be movably disposed on the adapting body and is movable relative to the adapting body when controlled to switch between states of turning on and off the gas flow passage. In the technical solution in embodiments of this application, since the valve body of the adapter can be controlled to switch to the state of turning off the gas flow passage, only the adapter needs to be mounted on the battery cell during transportation of the battery cell for testing, and no gas detection apparatus needs to be connected to the adapter to ensure gas tightness of the battery cell for testing, so that it is more convenient to transport the battery cell. In some embodiments, the gas flow passage includes a first passage, a second passage, and a mounting cavity, where the first passage runs through the first mating portion, the second passage runs through the second mating portion, and the mounting cavity connects the first passage and the second passage. The valve body is at least partially disposed in the mounting cavity and is constructed to be capable of switching between an off state and an on state when moving relative to the mounting cavity, where the valve body blocks the first passage and/or the second passage when in the off state, and the valve body is away from both the first passage and the second passage when in the on state. In this case, the gas flow passage is divided into three parts: the first passage, the second passage, and the mounting cavity. With the valve body at least partially disposed in the mounting cavity, the valve body is controlled to switch between the two states of turning on and off the gas flow passage by at least changing a position of the portion thereof located in the mounting cavity, making the structure simple and the control reliable. In some embodiments, the first passage and the second passage run through two intersecting inner walls of the mounting cavity, respectively, and the valve body is constructed to be movable relative to the mounting cavity when controlled, with one of the two inner walls located in a moving direction of the valve body and the other spaced apart from the valve body. In this case, the first passage and the second passage run through the two intersecting inner walls of the mounting cavity, respectively, which means that the first passage and the second passage extend to intersect, so that the gas flow passage is not very long in all directions, thereby avoiding a large size of the adapter in one direction and making transportation more convenient. In addition, the valve body only needs to move to open or close the intersection on one of the inner walls to turn on or off the gas flow passage, making the structure simple and easy to control. In some embodiments, the adapter