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CN-122026024-A - Aluminum shell lithium ion battery

CN122026024ACN 122026024 ACN122026024 ACN 122026024ACN-122026024-A

Abstract

The invention relates to the technical field of lithium ion batteries, and particularly discloses an aluminum-shell lithium ion battery. When the battery is used, the fuse strip can be fused due to the fact that the temperature of the battery core is higher, the limiting plate is not limited to the two groups of clamping blocks after the fuse strip is fused, the elastic band is matched with the rebound capability of the elastic band, the clamping blocks are driven to move, the clamping blocks can drive the two groups of isolating films to slide into the position between the battery core and the epoxy plate, the epoxy plate is located between the two groups of isolating films, the epoxy plates on two sides of the battery core are isolated, at the moment, even if the epoxy plate is broken due to the high temperature of the battery core, fragments generated by breakage of the epoxy plate are located between the two groups of isolating films, the fragments cannot directly contact with the battery core, the isolating films have anti-penetration capability, sharp fragments cannot penetrate through the isolating films, so that the fragments generated after breakage of the epoxy plate can be effectively prevented from penetrating the battery core, danger to a user is avoided, and loss of a user is reduced.

Inventors

  • GAO HONGSEN
  • ZHANG GUANGYU
  • YUAN SHUAISHUAI
  • WANG TINGJUAN
  • YANG XIAOYUE

Assignees

  • 国科能源(安庆)有限公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (8)

  1. 1. The utility model provides an aluminum hull lithium ion battery, includes aluminum hull (1), top cap (2), a plurality of base (10), a plurality of electric core (3), a plurality of epoxy board (4) and locating part (13), its characterized in that, the battery still includes: The aluminum shell (1) is internally provided with two groups of frames (5), the two groups of frames (5) are respectively positioned at the bottom and the top of the battery cell (3), the frames (5) comprise two mounting plates (51) and a plurality of guide plates (52), the two mounting plates (51) are respectively fixed at two ends of the guide plates (52), the guide plates (52) penetrate through the two groups of battery cells (3), the aluminum shell (1) is internally provided with mounting grooves (11) for mounting the mounting plates (51), and the mounting plates (51) are fixed through bolts (12); The isolating films (6) are arranged in a coiled mode, a plurality of groups of isolating films (6) are rotatably installed in the aluminum shell (1), and the isolating films (6) are located between the epoxy plate (4) and the battery cell (3); The safety strips (7) are arranged on the side surfaces of the electric cores (3), the safety strips (7) on two adjacent groups of electric cores (3) are symmetrical along the center of the vertical center line of the epoxy plate (4) between the two adjacent groups of electric cores (3), limiting plates (71) are arranged at two ends of the safety strips (7), and the safety strips (7) are easy to fuse after being heated; The driving assembly (8), the driving assembly (8) is installed on two adjacent deflector (52), the driving assembly (8) includes two clamp splice (81) and two elastic bands (82), two clamp splice (81) slidable mounting respectively on two deflector (52), the head end of two group's barrier film (6) of clamp splice (81) centre gripping, elastic band (82) are connected between clamp splice (81) and mounting panel (51) far away with it, elastic band (82) are in tensile tight state, the one side of elastic band (82) is connected at two clamp splice (81) respectively to the both ends of limiting plate (71).
  2. 2. The aluminum-shell lithium ion battery according to claim 1, wherein a part of the head end of the isolating film (6) is sandwiched between the epoxy plate (4) and the electric core (3).
  3. 3. The aluminium-shell lithium-ion battery according to claim 2, characterized in that the separator (6) is coated on both sides with a lubricating material.
  4. 4. An aluminium-shell lithium ion battery according to claim 3, characterized in that the isolating membrane (6) is a flexible film material with high insulation, high temperature resistance, fire resistance and puncture resistance, and the elastic band (82) is a high temperature resistant material.
  5. 5. The aluminum-shell lithium ion battery according to claim 4, wherein two protection plates (54) are connected between two guide plates (52) overlapped in upper and lower positions, and the protection plates (54) are positioned between two groups of isolation films (6) arranged on the side edges of the epoxy plates (4).
  6. 6. The aluminum-shell lithium ion battery according to claim 1, wherein a connecting plate (53) is arranged between two adjacent guide plates (52), the connecting plate (53) and the limiting plate (71) are positioned on the same side, a wedge block (531) is arranged on one side, close to the limiting plate (71), of the connecting plate (53), an inclined guide groove (5311) is formed in the wedge block (531), a guide block (711) is arranged on the limiting plate (71), and the guide block (711) is slidably mounted in the guide groove (5311).
  7. 7. The aluminum-shell lithium ion battery according to claim 6, wherein a protection component (9) is installed between the guide plate (52) and the connecting plate (53), the protection component (9) comprises a push plate (91), the push plate (91) is movably installed in the connecting plate (53) along the length direction of the guide plate (52), a cavity (521) is formed in the guide plate (52), a plurality of spray holes (522) are formed in one side, close to the battery core (3), of the guide plate (52), the push plate (91) extends into the cavity (521), shielding plates (92) are symmetrically arranged on the push plate (91), the shielding plates (92) are located in the cavity (521), the shielding plates (92) shield a plurality of spray holes (522), a plurality of through holes (921) are formed in the shielding plates (92), the push plate (91) drives the through holes (921) in similar positions to coincide with the spray holes (522) after the shielding plates (92) move, and fire extinguishing materials are stored in the cavity (521).
  8. 8. The aluminum-shell lithium ion battery according to claim 7, wherein an air bag (94) is installed in the cavity (521), fire extinguishing material is also stored in the air bag (94), an extrusion plate (93) is arranged on the push plate (91), and the other end of the extrusion plate (93) abuts against the air bag (94).

Description

Aluminum shell lithium ion battery Technical Field The invention relates to the technical field of lithium ion batteries, in particular to an aluminum shell lithium ion battery. Background An aluminum-shell lithium ion battery is essentially a square hard-shell lithium ion battery, and the most remarkable characteristic is that aluminum or aluminum alloy is used as a shell material of the battery. The aluminum shell lithium ion battery is formed by combining a plurality of groups of lithium ion battery cells and then packaging the lithium battery cells by an aluminum shell, when the lithium ion battery cells are assembled, an epoxy plate 4 (shown in fig. 13) is generally placed between two adjacent lithium ion battery cells, the epoxy plate is used as an insulating material, direct contact between the battery cells can be effectively blocked, short circuit risks caused by expansion or displacement of the battery cells are prevented, the epoxy plate can also absorb expansion stress in the charge and discharge process of the battery cells, the stability of the interval between the battery cells is maintained, and meanwhile, the impact of mechanical vibration on the battery cells is buffered. In the use process of the battery, the high temperature of the battery can lead to softening or carbonization of the epoxy plate and the like, so that the mechanical property of the epoxy plate is reduced to break, if the epoxy plate breaks during use, fragments can be generated during breaking, the fragments can be sharp particles, when the battery cell expands, the sharp fragments can penetrate into the battery cell to cause the diaphragm to penetrate, direct contact of the anode and the cathode is caused, internal short circuit is caused, the battery cell is damaged, the broken battery cell can also generate a fire phenomenon, and the loss is increased while the danger is brought to a user. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide an aluminum-shell lithium ion battery, so as to solve the technical problem that an epoxy plate between battery cells can be broken to generate fragments when in use, and the generated fragments can puncture the battery cells to cause huge loss. The aim of the invention can be achieved by the following technical scheme: The utility model provides an aluminum hull lithium ion battery, includes aluminum hull, top cap, a plurality of bases, a plurality of electric core, a plurality of epoxy board and locating part, the battery still includes: the frame is internally provided with two groups of frames which are respectively positioned at the bottom and the top of the battery cell, the frame comprises two mounting plates and a plurality of guide plates, the two mounting plates are respectively fixed at the two ends of the guide plates, the guide plates penetrate through the two groups of battery cells, the aluminum shell is internally provided with mounting grooves for mounting the mounting plates, and the mounting plates are fixed through bolts; the isolating films are arranged in a coiled mode, a plurality of groups of isolating films are rotatably installed in the aluminum shell, and the isolating films are positioned between the epoxy plate and the battery cell; The safety bars are arranged on the side surfaces of the electric cores, the safety bars on two adjacent groups of electric cores are centrosymmetric along the vertical central line of the epoxy plate between the two adjacent groups of electric cores, and the two ends of each safety bar are respectively provided with a limiting plate, so that the safety bars are easy to melt after being heated; The driving assembly is arranged on two adjacent guide plates and comprises two clamping blocks and two elastic bands, the two clamping blocks are respectively and slidably arranged on the two guide plates, the clamping blocks clamp the head ends of two groups of isolation films, the elastic bands are connected between the clamping blocks and the mounting plates far away from the clamping blocks, the elastic bands are in a stretching and tightening state, and two ends of the limiting plates are respectively abutted to one surface of the two clamping blocks, which is connected with the elastic bands. As a preferable mode of the above technical scheme, a part of the head end of the isolating film is clamped between the epoxy plate and the electric core. As a preferable mode of the above technical scheme, both sides of the isolating film are coated with the lubricating material. As the optimization of the technical scheme, the isolation film is made of a flexible film material with high insulation, high temperature resistance, fire resistance and puncture resistance, and the elastic band is made of a high temperature resistant material. As the optimization of the technical scheme, two protection plates are connected between the two guide plates with overlapped upper and lower positions, and the