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CN-224231194-U - Battery tightness detection tool

CN224231194UCN 224231194 UCN224231194 UCN 224231194UCN-224231194-U

Abstract

The utility model relates to the field of battery detection, in particular to a battery tightness detection tool. The device comprises a detection platform, a battery to be detected, a battery filling head, a filling pipe, a nitrogen valve, a helium valve and an evacuating valve, wherein the battery to be detected is fixed in a detection cavity of the detection platform, the detection cavity is pressed and sealed by a pressure cover, a detection hole is formed in the detection cavity and used for being communicated with a helium mass spectrum leak detection assembly, the filling head is inserted into a battery filling port of the battery to be detected to communicate a filling module with the battery to be detected, the filling pipe of the filling module is communicated with the filling head through a detection joint, and the filling pipe is provided with the nitrogen valve, the helium valve and the evacuating valve which are selectively communicated with the filling pipe. According to the utility model, helium filling, detection and cleaning work can be carried out on the battery in the detection cavity in the helium detection process of the battery, the detection efficiency is high, and the pollution degree of the detection cavity by helium is greatly reduced.

Inventors

  • ZHU YULONG
  • ZHANG CHONG
  • ZHU CAOSHENG

Assignees

  • 安徽诺益科技有限公司

Dates

Publication Date
20260512
Application Date
20250527

Claims (8)

  1. 1. A battery tightness detection tool is characterized by comprising a detection platform (1), a battery (12) to be detected is fixed in a detection cavity (11) of the detection platform (1), the detection cavity (11) is tightly pressed and sealed by a pressure cover, a detection hole (14) is formed in the detection cavity (11) and is used for being communicated with a helium mass spectrum leakage detection assembly, a filling head (27) is inserted into a battery liquid injection port of the battery (12) to be detected to communicate a filling module (3) with the battery (12) to be detected, a filling pipeline (32) of the filling module (3) is communicated with the filling head (27) through a detection joint (31), and a nitrogen valve (33), a helium valve (35) and an evacuation valve (34) which are selectively communicated with the filling pipeline (32) are arranged on the filling pipeline (32).
  2. 2. The battery tightness detection tool according to claim 1, wherein a filling port which is coaxially arranged with the battery liquid filling port is formed on the detection platform (1) so as to be inserted by a filling head (27), and a contact surface of the filling head (27) and the filling port is arranged in a sealing way.
  3. 3. The battery tightness detection tool according to claim 2, further comprising a mounting seat (2) which is arranged at intervals with the detection platform (1), wherein the mounting seat (2) is provided with a charging rod (25) which is driven by a charging cylinder (21) so as to linearly travel along the axis direction of a battery liquid injection port of the battery (12) to be detected, and the charging head (27) is fixed at the end part of the charging rod (25).
  4. 4. The battery tightness detection tool according to claim 3 is characterized in that a pressing plate (23) is arranged between the mounting seat (2) and the detection platform (1), a sealing cylinder (22) on the mounting seat (2) drives the pressing plate (23) to linearly move along the axis direction of the battery liquid injection port, the plate body of the pressing plate (23) is vertically arranged with the axis of the battery liquid injection port, a sealing pressure head (26) coaxially sleeved on the outer ring of the filling rod (25) is arranged on the pressing plate (23), the sealing pressure head (26) is made of elastic materials which can be deformed after being extruded, and the diameter of the sealing pressure head (26) is larger than that of the filling port of the detection platform (1).
  5. 5. The battery tightness detection tool according to claim 4, wherein a guide rod (24) which is arranged in parallel with the filling rod (25) is arranged between the mounting seat (2) and the detection platform (1), and the pressing plate (23) is in linear sliding fit along the rod body of the guide rod (24).
  6. 6. The battery tightness detection tool according to any of claims 1-5, wherein a positioning groove (13) corresponding to the size of the battery (12) to be detected is formed in the bottom of the detection cavity (11), and the battery (12) to be detected is clamped into the positioning groove (13).
  7. 7. The battery tightness detection tool according to any of claims 1-5, wherein the nitrogen valve (33) is communicated with a nitrogen source through a nitrogen source interface (331), the evacuation valve (34) is communicated with a vacuum pump through a vacuum pump interface (341), and the helium valve (35) is communicated with a helium source through a helium source interface (351).
  8. 8. The battery tightness detection tool according to any one of claims 1 to 5, wherein a vacuum gauge is installed on the detection platform (1) to monitor the vacuum degree in the detection cavity.

Description

Battery tightness detection tool Technical Field The utility model relates to the field of battery detection, in particular to a battery tightness detection tool. Background The detection of the tightness of the battery before delivery is a key link for ensuring the safety, performance and service life of the battery, has good tightness, can prevent electrolyte from leaking, ensures safety, can isolate moisture and oxygen, maintains electrochemical stability and maintains internal pressure balance, thereby prolonging the service life of the battery. The tightness detection of the existing battery mainly depends on helium detection, and can detect the leakage rate of 10 ﹣12Pa·m3/s level in cooperation with a mass spectrometer. When the existing battery tightness helium detection system is used for detecting, the battery is required to be arranged in a sealed cavity, the cavity is firstly subjected to rough vacuumizing and then subjected to fine vacuumizing, the residual helium in the detection cavity meets the set requirement, the battery is subjected to vacuumizing, a battery liquid injection port of a filling mechanism in the sealed cavity is filled with helium, a cavity vacuum pump is used for pumping air from the cavity to a helium mass spectrometer leak detector for detection, and after the detection is continued for a period of time, if the content of the helium in the gas is lower than the set requirement, the tightness of the battery shell is judged to be qualified. After the detection is completed, when the battery is taken out from the sealed cavity, part of helium filled in the battery leaks into the sealed cavity through the liquid injection port, so that the sealed cavity is polluted by the helium to influence the detection of the subsequent battery, and meanwhile, the residual helium in the battery is extremely strong in heat conductivity and permeability, and the residual helium is required to be independently sent to a cleaning station to clean the helium and then is sealed after the detection is completed, so that the whole detection process is quite various in procedures, and the problem is solved. Disclosure of utility model In order to avoid and overcome the technical problems in the prior art, the utility model provides a battery tightness detection tool. According to the utility model, helium filling, detection and cleaning work can be carried out on the battery in the detection cavity in the helium detection process of the battery, the detection efficiency is high, and the pollution degree of the detection cavity by helium is greatly reduced. In order to achieve the above purpose, the present utility model provides the following technical solutions: A battery tightness detection tool comprises a detection platform, a battery to be detected is fixed in a detection cavity of the detection platform, the detection cavity is pressed and sealed by a pressure cover, a detection hole is formed in the detection cavity and is used for being communicated with a helium mass spectrum leakage detection assembly, a filling head is inserted into a battery liquid injection port of the battery to be detected to communicate a filling module with the battery to be detected, a filling pipeline of the filling module is communicated with the filling head through a detection joint, and a nitrogen valve, a helium valve and an evacuation valve which are selectively communicated with the filling pipeline are arranged on the filling pipeline. As a further scheme of the utility model, a filling port which is coaxially arranged with a battery liquid filling port is arranged on the detection platform for the insertion of a filling head, and the contact surface of the filling head and the filling port is arranged in a sealing way. As a still further scheme of the utility model, the battery charging device further comprises a mounting seat which is arranged at intervals with the detection platform, and the mounting seat is provided with a charging rod which is driven by a charging electric cylinder so as to linearly travel along the axis direction of a battery charging port of the battery to be tested, and the charging head is fixed at the end part of the charging rod. The utility model further provides a pressing plate arranged between the mounting seat and the detection platform, a sealing cylinder on the mounting seat drives the pressing plate to linearly move along the axis direction of the battery liquid injection port, the plate body of the pressing plate is arranged perpendicular to the axis of the battery liquid injection port, the pressing plate is provided with a sealing pressing head coaxially sleeved on the outer ring of the filling rod, the sealing pressing head is made of elastic material which can be deformed after being extruded, and the diameter of the sealing pressing head is larger than that of the filling port of the detection platform. As a still further proposal of the utility model, a guide rod