Search

CN-122000645-A - Battery module

CN122000645ACN 122000645 ACN122000645 ACN 122000645ACN-122000645-A

Abstract

The invention relates to the technical field of battery safety, and discloses a battery module. The battery module comprises a box body and a plurality of electric cores which are arranged in the box body in parallel, wherein a first elastic piece is arranged between two adjacent electric cores, the first elastic piece can apply elastic force towards a first direction to the electric cores, one side of the box body along the first direction is open, the open end of the box body is plugged by a sealing plate, and the sealing plate can be separated from the open end of the box body when the temperature of the electric cores is abnormal. The battery module provided by the invention can timely react to the abnormal battery cells of the battery module, so that the performance of the battery module under various working conditions is ensured, the service life of the battery module is prolonged, the thermal runaway is prevented, the use safety of the battery module is improved, the battery module in the design mode has a compact structure, the energy density of the battery module is improved, and meanwhile, the moving distance of the battery cells along the first direction is smaller, and the design of avoiding excessive space is not needed.

Inventors

  • CHEN GANG
  • SHI WEIWEI
  • HUANG JINJIAN
  • GU KAIKAI

Assignees

  • 海四达智慧能源(江苏)有限公司
  • 江苏海四达电源有限公司

Dates

Publication Date
20260508
Application Date
20241031

Claims (10)

  1. 1. The utility model provides a battery module, its characterized in that includes box (1) and sets up side by side a plurality of electric core (2) of box (1) inside are equipped with first elastic component (3) between two adjacent electric core (2), first elastic component (3) can be right electric core (2) are applyed towards the elasticity of first direction, one side of box (1) along the first direction is uncovered, open end (11) of box (1) are through shrouding (4) shutoff, shrouding (4) can be in when the temperature of electric core (2) appears unusual break away from open end (11) of box (1) to the configuration is: under the constraint of the sealing plate (4) is lost, at least the first elastic piece (3) adjacent to the abnormal battery cell (2) can stretch out so as to spring the normal battery cell (2) and disconnect the abnormal battery cell (2) from the normal battery cell (2).
  2. 2. The battery module according to claim 1, wherein a first tab (21) and a second tab (22) are respectively arranged on the electrodes of two adjacent battery cells (2), the first tab (21) and the second tab (22) are in clamping fit along the first direction, and the first tab (21) and the second tab (22) can be disconnected when the two adjacent battery cells (2) are sprung apart.
  3. 3. The battery module according to claim 2, wherein the first elastic member (3) comprises a first spring disposed between two adjacent cells (2), and a plurality of the first springs are capable of bouncing off the two adjacent cells (2) and disconnecting the first tab (21) from the second tab (22) when the restraint of the sealing plate (4) is lost.
  4. 4. The battery module according to claim 2, wherein the first elastic member (3) includes a deformation unit capable of protruding in the first direction when an abnormality occurs in the temperature of the battery cell (2) adjacent thereto, to spring open the normal battery cell (2) adjacent thereto and disconnect the first tab (21) from the second tab (22).
  5. 5. The battery module according to claim 4, further comprising a first backup line, wherein the first tab (21) and the second tab (22) are each provided with a line socket communicating with the first backup line.
  6. 6. The battery module according to claim 4, further comprising a second standby line (6) and a control assembly capable of controlling the on-off between the second standby line (6) and the battery cell (2), and configured to: when the temperature of the battery cell (2) is abnormal, the control assembly can control the standby circuit to be communicated with the normal battery cells (2) positioned at the two sides of the abnormal battery cell (2) so as to restore the operation of the battery module.
  7. 7. The battery module according to claim 2, wherein a plurality of slots (211) are arranged on the first tab (21) at intervals, a plurality of inserting blocks (221) are arranged on the second tab (22) at intervals, and the slots (211) are in one-to-one correspondence with the inserting blocks (221) and are in clamping fit.
  8. 8. The battery module according to any one of claims 1 to 7, wherein electromagnetic holders (5) are provided on both sides of the open end (11) of the case (1), the sealing plate (4) includes a U-shaped band (41), and the U-shaped band (41) is made of a metal material, and both sides of the U-shaped band (41) are respectively slidably fitted with the two electromagnetic holders (5) along the first direction, and are configured to: the electromagnetic fixer (5) can be used for being demagnetized when the temperature of the battery cell (2) is abnormal so as to release the U-shaped belt (41).
  9. 9. The battery module according to claim 8, wherein the electromagnetic holder (5) is provided with a chute (51) into which the U-shaped belt (41) is inserted, and the bottoms of both sides of the U-shaped belt (41) are provided with arc-shaped sliders (4121) slidably fitted with the bottoms of the chute (51).
  10. 10. The battery module according to any one of claims 1 to 7, characterized in that a rectangular groove (12) is provided in the case (1) at a position corresponding to the battery cell (2), the rectangular groove (12) having an area smaller than the cross-sectional area of the battery cell (2); And/or a vent (13) is arranged at the position of the box body (1) corresponding to the first elastic piece (3).

Description

Battery module Technical Field The invention relates to the technical field of battery safety, in particular to a battery module. Background With the popularization of battery modules in electric vehicles, energy storage systems and communication fields, the safety technology of the battery modules is becoming more and more important. The battery module is formed by combining a plurality of single battery cells, and the performance and the safety of the battery module are influenced by temperature or other factors. When the current battery module is used, when one of the battery cells fails to cause abnormal temperature or the temperature is too high to cause spontaneous combustion, other battery modules or the whole battery module is easy to ignite and the safety is poor. Therefore, it is highly desirable to provide an immediate intelligent management technology that is critical to ensure the performance of the battery module under various operating conditions, to extend the life thereof, to prevent thermal runaway, and to ensure the safety of the system. Disclosure of Invention The invention provides a battery module, which aims to solve the technical problems that when the battery core of the existing battery module fails to cause abnormal temperature or the temperature is too high to cause spontaneous combustion, other battery modules or the whole battery module is easy to ignite, and the safety is poor. The invention provides a battery module, which comprises a box body and a plurality of electric cores arranged in the box body in parallel, wherein a first elastic piece is arranged between two adjacent electric cores, the first elastic piece can apply elastic force towards a first direction to the electric cores, one side of the box body along the first direction is opened, the open end of the box body is blocked by a sealing plate, and the sealing plate can be separated from the open end of the box body when the temperature of the electric cores is abnormal and is configured to: Under the constraint of the sealing plate is lost, at least the first elastic piece adjacent to the abnormal battery cell can stretch out so as to spring the normal battery cell and break the communication between the abnormal battery cell and the normal battery cell. Optionally, the electrodes of the two adjacent cells are respectively provided with a first tab and a second tab, the first tab and the second tab are in clamping fit along the first direction, and the first tab and the second tab can be disconnected when the two adjacent cells are sprung. Optionally, the first elastic element includes a first spring disposed between two adjacent cells, and under the constraint of the sealing plate, a plurality of first springs can spring the two adjacent cells and disconnect the connection between the first tab and the second tab. Optionally, the first elastic member includes a deformation unit, where the deformation unit can stretch out along the first direction when an abnormality occurs in the temperature of the adjacent battery cell, so as to spring open the adjacent normal battery cell and disconnect the connection between the first tab and the second tab. Optionally, the battery module further includes a first standby circuit, and the first tab and the second tab are both provided with a circuit socket communicated with the first standby circuit. Optionally, the battery module further includes a second standby line and a control component capable of controlling on-off between the second standby line and the battery cell, and is configured to: When the temperature of the battery cell is abnormal, the control assembly can control the standby circuit to be communicated with the normal battery cells positioned on the two sides of the abnormal battery cell so as to recover the operation of the battery module. Optionally, a plurality of slots are arranged on the first tab at intervals, a plurality of inserting blocks are arranged on the second tab at intervals, and the slots are in one-to-one correspondence with the inserting blocks and are in clamping fit. Optionally, the both sides of the open end of box all are equipped with electromagnetic fixers, the shrouding includes the U-shaped area, just the U-shaped area adopts the metal material, the both sides in U-shaped area respectively with two electromagnetic fixers is followed first direction sliding fit to dispose to: The electromagnetic fixer can be demagnetized when the temperature of the battery cell is abnormal so as to release the U-shaped belt. Optionally, a chute into which the U-shaped belt is inserted is arranged on the electromagnetic fixer, and arc-shaped sliding blocks in sliding fit with the bottoms of the chute are arranged at the bottoms of the two sides of the U-shaped belt. Optionally, a rectangular groove is arranged at a position of the box body corresponding to the battery cell, and the area of the rectangular groove is smaller than the cross-sectional are