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CN-224217493-U - Soft package battery and battery package

CN224217493UCN 224217493 UCN224217493 UCN 224217493UCN-224217493-U

Abstract

The utility model relates to the field of batteries and discloses a soft package battery and a battery pack, wherein the battery pack comprises a shell and a battery core, a containing cavity is formed in the shell, the battery core is arranged in the containing cavity, a first blocking layer is arranged on the inner wall surface of the shell facing the containing cavity, the first blocking layer comprises a plurality of first blocking pieces arranged at intervals, a first storage gap for storing electrolyte is formed between any two first blocking pieces, the first blocking layer is arranged on the inner wall of the containing cavity, the battery core is wrapped by the first blocking layer, and after the electrolyte is injected into the battery core, the electrolyte can be stored in the first storage gap between the plurality of first blocking pieces, so that excessive dissociation to a two-sealing area in the standing process of the electrolyte is avoided, the two-sealing area is formed into a gel state, and the stability and safety of sealing of the two-sealing area of the battery core are further improved.

Inventors

  • PENG ANMIN
  • XU GUOQING

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250528

Claims (10)

  1. 1. The utility model provides a soft packet of battery, its characterized in that, includes casing (1) and electric core (3), be formed with holding chamber (2) in casing (1), electric core (3) are located in holding chamber (2), casing (1) orientation the internal face of holding chamber (2) is provided with first barrier layer (4), first barrier layer (4) are including first barrier piece (41) that a plurality of intervals set up, arbitrary two be formed with the first memory gap that is used for storing electrolyte between first barrier piece (41).
  2. 2. The pouch cell of claim 1, wherein the first barrier (41) is a glue layer.
  3. 3. The flexible battery according to claim 1, wherein the first blocking member (41) is a reinforcing rib arranged on an inner wall surface of the housing (1) facing the accommodating cavity (2), and the reinforcing rib protrudes toward the battery cell (3) and is integrally formed with the housing (1).
  4. 4. The flexible battery pack according to claim 1, wherein the case (1) comprises two casing portions (11), the accommodating chamber (2) is formed between the two casing portions (11), a connection flange (12) is formed at the peripheral edge of the casing portions (11), the two casing portions (11) are connected by the connection flange (12), a second barrier layer (5) is provided at a side of one casing portion (11) facing the other casing portion (11), the second barrier layer (5) comprises a plurality of second barrier members (51) provided at intervals, and a second storage gap for storing an electrolyte is formed between any two of the second barrier members (51).
  5. 5. The pouch cell of claim 4, wherein the width of the second storage gap is less than the width of the first storage gap.
  6. 6. The pouch cell according to claim 4, wherein the thickness of the second barrier layer (5) is smaller than the thickness of the first barrier layer (4).
  7. 7. The pouch cell of claim 4, wherein the edge of the second barrier layer (5) is flush with the end of the connecting flange (12) on the side remote from the cell (3).
  8. 8. The flexible battery pack according to claim 4, wherein one of the housing portions (11) has a cover surface (13), and the other housing portion (11) is formed with a first accommodation hole (14), and the cover surface (13) and an inner wall surface of the first accommodation hole (14) are enclosed to form the accommodation cavity (2); Or, the two shell parts (11) are respectively formed with a second accommodating pit (15), and the inner wall surfaces of the two second accommodating pits (15) are enclosed to form the accommodating cavity (2).
  9. 9. The pouch cell of claim 1, wherein the first barrier member has a shape of a dot, a polygonal shape, or a line.
  10. 10. A battery pack comprising a pouch cell according to any one of claims 1 to 9, said pouch cell being provided with at least one.

Description

Soft package battery and battery package Technical Field The utility model relates to the field of batteries, in particular to a soft package battery and a battery package. Background The current safety problem of the soft package battery is mainly focused on the heat sealing problem of the aluminum plastic film, and the soft package battery achieves the packaging effect by utilizing the heat fusion bonding of the polypropylene polymers of the inner layer of the aluminum plastic film in the packaging process of the aluminum plastic film. In the heat sealing process of the battery cell, after the top side seal is finished, electrolyte is required to be injected into the battery cell at the first seal position of the battery cell, then the battery cell is sealed and kept still, so that the electrolyte fully infiltrates the pole piece to be formed and separated, gas generated in the forming process can enter the air bag, and after the separation, the pressure is required to be applied to the winding core position, and meanwhile, the second seal area is sealed. However, in the actual operation process, the free electrolyte inside the battery cell is randomly distributed, after the electrolyte is liquefied into components, part of the electrolyte can become gel, and the electrolyte in the gel is very easy to remain in the two-sealing area, so that the risk of virtual sealing exists in the two-sealing area of the aluminum plastic film, and particularly, the risk of generating virtual sealing in the two-sealing area is also greater along with the increase of the size of the soft package battery. The occurrence of the problem of the virtual seal can cause the phenomena of air leakage, liquid leakage and the like of the soft package battery, and substances such as moisture, oxygen and the like in the air also easily enter the battery through the virtual seal area, and corrode and destroy the internal structure of the battery, thereby bringing hidden danger to the safety of the battery. Disclosure of utility model The utility model aims to solve the technical problems that: in order to solve the technical problems, the utility model provides a soft package battery, which comprises a shell and a battery cell, wherein a containing cavity is formed in the shell, the battery cell is arranged in the containing cavity, a first barrier layer is arranged on the inner wall surface of the shell facing the containing cavity, the first barrier layer comprises a plurality of first barrier pieces arranged at intervals, and a first storage gap for storing electrolyte is formed between any two of the first barrier pieces. In some embodiments, the first barrier is a glue layer. In some embodiments, the first blocking member is a reinforcing rib disposed on an inner wall surface of the housing facing the accommodating cavity, and the reinforcing rib is disposed protruding toward the battery cell and integrally formed with the housing. In some embodiments, the housing includes two casing parts, two the housing parts are formed with the holding chamber between, the peripheral edge of casing parts is formed with the flange that connects, two the casing parts pass through the flange connection, one the flange of casing part towards another one side of casing part is provided with the second barrier layer, the second barrier layer includes a plurality of second barrier pieces that the interval set up, arbitrary two be formed with the second storage gap that is used for storing electrolyte between the second barrier piece. In some embodiments, the width of the second storage gap is less than the width of the first storage gap. In some embodiments, the thickness of the second barrier layer is less than the thickness of the first barrier layer. In some embodiments, the second barrier layer edge is flush with the connection flange on a side end distal from the cell. In some embodiments, one of the housing parts has a cover surface, and the other housing part is formed with a first accommodating pit, and the cover surface and the inner wall surface of the first accommodating pit enclose to form the accommodating cavity; Or the two shell parts are respectively provided with a second accommodating pit, and the inner wall surfaces of the two second accommodating pits are enclosed to form the accommodating cavity. In some embodiments, the shape of the first barrier member is a dot shape, a polygonal shape, or a linear shape. The utility model also provides a battery pack, which comprises the soft pack battery, wherein at least one soft pack battery in the battery pack is arranged. Compared with the prior art, the soft package battery provided by the embodiment of the utility model has the beneficial effects that: According to the utility model, the blocking layer is arranged on the inner wall of the accommodating cavity and comprises the first blocking pieces which are arranged at intervals, and after electrolyte is injected into the battery cell,