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CN-122025740-A - Battery monomer, battery device, electric equipment and preparation method of battery monomer

CN122025740ACN 122025740 ACN122025740 ACN 122025740ACN-122025740-A

Abstract

The application relates to the technical field of battery production, in particular to a battery monomer, a battery device, electric equipment and a preparation method of the battery monomer. The battery monomer includes electrode assembly, and electrode assembly includes the diaphragm, and the diaphragm has width direction and thickness direction, and the diaphragm includes base film and coating, and the coating is located the surface of at least one side of base film along thickness direction, and the surface that the coating deviates from the base film is equipped with reservoir and drainage channel, and wherein, at least one end of drainage channel extends to the edge of coating along width direction, is equipped with the reservoir with the drainage channel intercommunication on the drainage channel. According to the embodiment of the application, the electrolyte entering the drainage channel from the edge of the diaphragm can be continuously supplemented to the liquid storage tank and flows along the drainage channel, so that the pole piece is fully infiltrated, and the infiltration effect of the electrolyte on the pole piece is improved.

Inventors

  • YIN JIAN
  • TENG GUOPENG
  • Wu Xinzhan
  • LI BO
  • Lv shan
  • WANG XIN

Assignees

  • 江苏时代新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (14)

  1. 1. A battery cell, the battery cell comprising: The electrode assembly comprises a diaphragm, the diaphragm is provided with a width direction and a thickness direction, the diaphragm comprises a base film and a coating, the coating is positioned on the surface of at least one side of the base film along the thickness direction, a liquid storage tank and a drainage channel are arranged on the surface of the coating, which is away from the base film, at least one end of the drainage channel extends to the edge of the coating along the width direction, and the drainage channel is provided with the liquid storage tank communicated with the drainage channel.
  2. 2. The battery cell of claim 1, wherein the drainage channel comprises a first flow channel, at least one end of the first flow channel extending to an edge of the coating in the width direction, wherein the first flow channel is provided with the reservoir.
  3. 3. The battery cell according to claim 2, wherein the separator further has a longitudinal direction, the number of the first flow channels is at least two, and the at least two first flow channels are arranged at intervals in parallel along the longitudinal direction, wherein the first flow channels are arranged obliquely to the longitudinal direction, and the inclination angle of the first flow channels is greater than 0 degrees and less than 90 degrees.
  4. 4. The battery cell as recited in claim 3, wherein the drainage channel further comprises a second flow channel, at least one end of the second flow channel extends to an edge of the coating layer along the width direction, and the liquid storage groove is arranged on the second flow channel, wherein the second flow channel is obliquely arranged relative to the length direction, and an oblique angle of the second flow channel is different from that of the first flow channel.
  5. 5. The battery cell as recited in claim 4, wherein the number of the second flow channels is at least two, and at least two of the second flow channels are arranged in parallel at intervals along the length direction.
  6. 6. The battery cell of claim 5, wherein at least a portion of the reservoir is disposed at a location where the first flow channel and the second flow channel intersect.
  7. 7. The battery cell of claim 5, wherein the first flow channel has a maximum flow width that is less than a maximum flow width of the reservoir and/or the second flow channel has a maximum flow width that is less than a maximum flow width of the reservoir.
  8. 8. The battery cell as recited in claim 7, wherein the maximum flow width of the first flow channel is the same as the maximum flow width of the second flow channel, and the ratio of the maximum flow width of the reservoir to the maximum flow width of the first flow channel has a value interval of greater than 1.1 and less than 1.5.
  9. 9. The battery cell of claim 5, wherein the tilt angle of the first flow channel has a value interval of greater than 0 ° and less than 90 °, and/or the tilt angle of the second flow channel has a value interval of greater than 90 ° and less than 180 °.
  10. 10. The battery cell of claim 5, wherein the tilt angle of the first flow channel has a value interval of greater than 30 ° and less than 75 °, and/or the tilt angle of the second flow channel has a value interval of greater than 120 ° and less than 165 °.
  11. 11. The battery cell of claim 9, wherein a separation distance between two adjacent first flow channels is equal to a separation distance between two adjacent second flow channels.
  12. 12. A battery device, characterized in that the battery device comprises: The battery cell according to any one of claims 1 to 11, and The battery unit is arranged in the box body.
  13. 13. A powered device comprising the battery device of claim 12, the battery device configured to power the powered device.
  14. 14. A method for producing a battery cell, characterized in that the battery cell is the battery cell according to any one of claims 1 to 11, the method comprising: Providing a base film; Providing a coating layer on a surface of at least one side of the base film in a thickness direction; drying the coating; The coating after drying is provided with a liquid storage tank and a drainage channel, wherein at least one end of the drainage channel extends to the edge of the coating along the width direction, the liquid storage tank is arranged at intervals with the edge of the coating, and the drainage channel is provided with the liquid storage tank communicated with the drainage channel.

Description

Battery monomer, battery device, electric equipment and preparation method of battery monomer Technical Field The application relates to the technical field of battery production, in particular to a battery monomer, a battery device, electric equipment and a preparation method of the battery monomer. Background This section provides merely background information related to the present disclosure and is not necessarily prior art. With the increasing maturity of new energy technology, new energy automobiles and other electric equipment gradually enter the field of view of the public. The main core technology of the new energy automobile is a battery device, and the safety and the stability of the battery device directly determine the performance of the whole automobile. The battery device comprises a battery unit, the battery unit comprises an electrode assembly, the electrode assembly comprises a diaphragm, the diaphragm comprises a base film, a coating is arranged on the surface of at least one side of the base film, electrolyte is difficult to flow to the position, which is needed to be infiltrated, of a pole piece of the electrode assembly, and the situation that the electrolyte is worse than the pole piece of the electrode assembly is easy to infiltrate is easy to occur. Disclosure of Invention In view of the above problems, the application provides a battery cell, a battery device, electric equipment and a preparation method of the battery cell, which solve the problem that the electrolyte is easy to infiltrate into a pole piece of an electrode assembly in the prior art. A first aspect of an embodiment of the present application proposes a battery cell including an electrode assembly including a separator having a width direction and a thickness direction, the separator including a base film and a coating layer, the coating layer being located on a surface of at least one side of the base film in the thickness direction, the surface of the coating layer facing away from the base film being provided with a liquid storage tank and a drainage channel, wherein at least one end of the drainage channel extends to an edge of the coating layer in the width direction, the drainage channel being provided with the liquid storage tank communicating with the drainage channel. According to the embodiment of the application, the diaphragm comprising the base film and the coating is arranged, wherein the coating is positioned on the surface of at least one side of the base film along the thickness direction, the surface of the coating, which is away from the base film, is provided with the liquid storage tank and the drainage channel, at least one end of the drainage channel extends to the edge of the coating along the width direction, and the liquid storage tank communicated with the drainage channel is arranged on the drainage channel, so that electrolyte entering the drainage channel from the edge of the diaphragm can be continuously supplemented to the liquid storage tank and flow along the drainage channel, the pole piece of the electrode assembly is fully infiltrated, and the infiltration effect of the electrolyte on the pole piece of the electrode assembly is improved. In some embodiments of the application, the drainage channel comprises a first flow channel, at least one end of the first flow channel extends to the edge of the coating in the width direction, wherein a liquid storage groove is arranged on the first flow channel. According to the embodiment of the application, the first flow channel is arranged, at least one end of the first flow channel extends to the edge of the coating in the width direction, and the liquid storage groove is arranged on the first flow channel, so that electrolyte can be supplemented to the liquid storage groove on the first flow channel through the first flow channel, the electrolyte can flow along the first flow channel, the pole piece of the electrode assembly is fully infiltrated, and the infiltration effect of the electrolyte on the pole piece of the electrode assembly is improved. In some embodiments of the present application, the separator further has a length direction, and the number of the first flow channels is at least two, and the at least two first flow channels are arranged in parallel and at intervals along the length direction, wherein the first flow channels are arranged obliquely relative to the length direction. According to the embodiment of the application, the number of the first flow channels is at least two, and the at least two first flow channels are arranged in parallel at intervals along the length direction, wherein the first flow channels are obliquely arranged relative to the length direction, compared with the situation that the inclination angle of the first flow channels is 90 degrees, the length of the first flow channels can be increased, and the electrolyte can be respectively supplied to corresponding liquid storage tanks through the at