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CN-224232680-U - Battery formation device and battery production line

CN224232680UCN 224232680 UCN224232680 UCN 224232680UCN-224232680-U

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery formation device and a battery production line. The battery formation device comprises a main pipeline, branch pipelines and a plurality of branch pipelines, wherein the first end of the main pipeline is connected with the negative pressure device, at least part of the branch pipelines are constructed into annular channels, the second end of the main pipeline is communicated with the branch pipelines, the plurality of branch pipelines are arranged on the branch pipelines, the first ends of the branch pipelines are communicated with the branch pipelines, the first ends of the branch pipelines are arranged on the branch pipelines at intervals, and the second ends of the branch pipelines are used for being connected with the battery cells. This battery formation device and battery production line has add the branch pipeline between a plurality of branch pipelines and trunk line, and annular part branch pipeline plays the effect to gaseous even pressure, compares the trunk line and directly links to each other with the branch pipeline, and the negative pressure is stable in the branch pipeline, and the negative pressure in every branch pipeline of association also tends to unanimous for the quantity of the electrolyte of every electricity core suction tends to unanimous, and then ensures behind the fluid replacement that the quantity of the electrolyte in the electricity core tends to unanimous.

Inventors

  • QIN SHAN
  • LU XIONG
  • Tao Zhuanqin

Assignees

  • 清陶(昆山)能源发展集团股份有限公司

Dates

Publication Date
20260512
Application Date
20250523

Claims (10)

  1. 1. A battery formation device, comprising: The device comprises a main pipeline (1) and branch pipelines (2), wherein a first end of the main pipeline (1) is connected with a negative pressure device, at least part of the branch pipelines (2) are constructed into annular channels, and a second end of the main pipeline (1) is communicated with the branch pipelines (2); the branch pipes (3) are arranged on the branch pipes (2), the first ends of the branch pipes (3) are communicated with the branch pipes (2), the first ends of the branch pipes (3) are arranged on the branch pipes (2) at intervals, and the second ends of the branch pipes (3) are connected with the battery cells (5).
  2. 2. The battery formation apparatus according to claim 1, wherein the branch pipe (2) includes: -an annular tube (21), said annular tube (21) being in communication with the second end of said main tube (1) and with the first ends of a plurality of said branch tubes (3); at least one through pipe (22), both ends of the through pipe (22) are respectively communicated with two positions of the annular pipe (21).
  3. 3. The battery formation apparatus according to claim 2, wherein the second end of the main pipe (1) communicates with the annular pipe (21) in a first position, the first end of the through pipe (22) communicates with the annular pipe (21) in a second position, the second end of the through pipe (22) communicates with the annular pipe (21) in a third position, the branch pipe (3) communicates with the annular pipe (21) in a fourth position, wherein the first position, the second position, the third position, and the fourth position are non-collinear.
  4. 4. The battery formation apparatus according to claim 2, wherein one or more through pipes (22) are provided, and one or more through pipes (22) divide the length of the annular pipe (21) equally.
  5. 5. The battery formation device according to claim 2, characterized in that the branch pipe (2) further comprises two extension pipes (23), the extension pipes (23) are in communication with the annular pipe (21), and one or more branch pipes (3) are provided on the extension pipes (23).
  6. 6. The battery formation apparatus according to claim 5, wherein the two extension pipes (23) are equal in length and are symmetrically arranged with respect to the annular pipe (21).
  7. 7. Battery formation device according to any one of claims 2-6, characterized in that a plurality of the branch ducts (3) are arranged symmetrically with respect to the annular tube (21).
  8. 8. Battery formation device according to any one of claims 1-6, characterized in that a liquid reservoir (4) is arranged between each branch conduit (3) and the corresponding cell (5).
  9. 9. The battery formation device according to claim 8, wherein a negative pressure suction nozzle (7) is arranged at one end of the liquid storage tank (4) away from the branch pipeline (3), and the negative pressure suction nozzle (7) is connected with the liquid injection port (6) of the corresponding battery cell (5).
  10. 10. Battery production line, characterized by comprising a battery formation device according to any of claims 1-9.

Description

Battery formation device and battery production line Technical Field The utility model relates to the technical field of batteries, in particular to a battery formation device and a battery production line. Background The aluminum shell lithium ion battery has the advantages of large capacity, long cycle life, safety and reliability, and has great influence on large-scale energy storage and addition and storage. In the production process of the aluminum shell battery, the formation process plays a crucial role in the final performance of the battery. The formation process charges the battery with small current under the negative pressure state, so that a stable and compact SEI film is formed at the electrode plate interface, and meanwhile, gas generated by the reaction of the electrolyte and the electrode is pumped away, so that the lithium battery with qualified size and stable performance is obtained. The market has high requirements on low-temperature rate performance and long-cycle performance of the battery, and a larger liquid injection coefficient is generally adopted to meet the electrical performance requirement, and along with the increase of the liquid injection amount, more free electrolyte is very easy to be pumped into a negative pressure pipeline during formation. In the existing formation process, as shown in fig. 1, the negative pressure pipeline is mostly designed into a straight pipe 1', air is pumped from one end, a plurality of branch pipes 2' are sequentially communicated with the straight pipe 1 'along the extending direction of the straight pipe 1', the negative pressure effect of the straight pipe 1 'close to the negative pressure device is good, the negative pressure effect of the cell 3' far away from the negative pressure device is poor, more electrolyte is pumped into the straight pipe 1 'from the cell 3' close to the negative pressure device, less electrolyte is pumped into the straight pipe 1 'from the cell 3' far away from the negative pressure device, the loss of liquid of each cell 3 'after formation is quite different, the subsequent liquid supplementing device generally supplements liquid by a fixed amount, the amount of electrolyte of the cell 3' after liquid supplementing is also different, or the electrolyte is excessive after liquid supplementing is caused. Therefore, there is a need to design a battery formation device and a battery production line to solve the above problems. Disclosure of utility model An object of the present utility model is to provide a battery formation device capable of improving the balance of negative pressure applied to each cell to ensure the average of the amount of electrolyte in each cell. Another object of the present utility model is to provide a battery production line, in which the amount of electrolyte in each cell can be made to be uniform by using the above battery formation device. To achieve the purpose, the utility model adopts the following technical scheme: A battery formation apparatus comprising: The device comprises a main pipeline and branch pipelines, wherein the first end of the main pipeline is connected with a negative pressure device, at least part of the branch pipelines are constructed into annular channels, and the second end of the main pipeline is communicated with the branch pipelines; The branch pipes are arranged on the branch pipes, the first ends of the branch pipes are communicated with the branch pipes, the first ends of the branch pipes are arranged on the branch pipes at intervals, and the second ends of the branch pipes are used for being connected with the battery cells. As an alternative, the above-mentioned branch pipe includes: A ring pipe which is communicated with the second end of the main pipe and is communicated with the first ends of a plurality of branch pipes; At least one through pipe, two ends of the through pipe are respectively communicated with two positions of the annular pipe. As an alternative, the second end of the main pipe is in communication with the annular pipe at a first position, the first end of the through pipe is in communication with the annular pipe at a second position, the second end of the through pipe is in communication with the annular pipe at a third position, and the branch pipe is in communication with the annular pipe at a fourth position, wherein the first position, the second position, the third position, and the fourth position are non-collinear. As an alternative, the through pipe may be provided with one or more through pipes, and the one or more through pipes may divide the length of the annular pipe equally. As an alternative, the branch pipe further includes two extension pipes, the extension pipes are communicated with the annular pipe, and one or more branch pipes are arranged on the extension pipes. As an alternative, the two extension pipes have equal lengths and are symmetrically arranged with respect to the annular pipe. As an alternative, a plu