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CN-224204198-U - Cover plate assembly and battery

CN224204198UCN 224204198 UCN224204198 UCN 224204198UCN-224204198-U

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a battery, wherein the cover plate assembly is connected with a battery core and comprises a cover plate body, a pole post, a conductive block, a temperature control spring plate and a refrigerating plate, and the pole post is arranged on the cover plate body; the temperature control elastic sheet is arranged between the cover plate body and one end of the pole facing the battery core, the temperature control elastic sheet is in a deformation state and a reset state, when the temperature control elastic sheet is in the deformation state, the temperature control elastic sheet is connected with the cover plate body and the pole to realize the electric connection of the cover plate body and the pole, and the refrigerating sheet is connected with the conductive block. So, when the inside temperature of battery is unusual to rise, the control by temperature change shell fragment can be followed reset state and switched to deformation state, makes the apron body pass through the control by temperature change shell fragment and be connected with utmost point post electricity, realizes short-circuit protection for the control by temperature change shell fragment can provide the protection to the battery repeatedly, and the refrigeration piece can in time derive the inside heat of battery, improves the security and the reliability of battery.

Inventors

  • LI JIANJU
  • QIU YISHENG
  • LU SONGJIAN

Assignees

  • 深圳市科达利实业股份有限公司

Dates

Publication Date
20260505
Application Date
20250417

Claims (10)

  1. 1. A cover assembly connected to a cell, the cover assembly comprising: The device comprises a cover plate body (1) and a pole column (2), wherein the pole column (2) is arranged on the cover plate body (1); The conductive block (3) is connected with one end, deviating from the battery cell, of the pole post (2); the temperature control elastic piece (4) is arranged between the cover plate body (1) and one end, facing the battery cell, of the pole column (2), the temperature control elastic piece (4) is in a deformation state and a reset state, and when the temperature control elastic piece (4) is in the deformation state, the temperature control elastic piece (4) is connected with the cover plate body (1) and the pole column (2) so as to realize the electric connection of the cover plate body (1) and the pole column (2); and the refrigerating sheet (6) is connected with the conductive block (3).
  2. 2. The cover plate assembly according to claim 1, wherein the cover plate body (1) is provided with a mounting groove (11) towards the surface of the battery cell, the cover plate assembly further comprises a lower plastic (7), the lower plastic (7) is arranged on one side of the cover plate body (1) towards the battery cell, the position of the lower plastic (7) corresponding to the mounting groove (11) is provided with a connecting hole (71), the temperature-control elastic sheet (4) comprises a fixing part (41) and a movable part (42), the fixing part (41) is fixedly arranged in the mounting groove (11), the movable part (42) can be selectively moved along a direction close to or far away from the battery cell, and the mounting groove (11) and the connecting hole (71) jointly form a movable space for the movable part (42) to move.
  3. 3. The cover plate assembly according to claim 2, wherein the sectional area of the mounting groove (11) is larger than the sectional area of the connection hole (71).
  4. 4. The cover plate assembly according to claim 2, wherein a plurality of temperature control spring plates (4) are provided, and the movable parts (42) of the temperature control spring plates (4) in the same mounting groove (11) are arranged in opposite directions.
  5. 5. The cover plate assembly according to claim 1, further comprising an upper plastic (5), the upper plastic (5) being arranged between the conductive block (3) and the cover plate body (1), the cooling fin (6) being arranged around an outer side wall of the upper plastic (5).
  6. 6. The cover plate assembly according to claim 5, characterized in that the height of the cooling fin (6) is smaller than the height of the upper plastic (5).
  7. 7. The cover plate assembly according to claim 5, wherein the refrigerating sheet (6) is connected with a limiting block (61), and a limiting groove (51) is formed in the position of the upper plastic (5) corresponding to the limiting block (61), so that the refrigerating sheet (6) is clamped with the upper plastic (5).
  8. 8. The cover plate assembly according to claim 7, wherein the limiting blocks (61) are arranged in one-to-one correspondence with the limiting grooves (51), and a plurality of limiting blocks (61) are arranged around the upper plastic (5) at intervals.
  9. 9. The cover plate assembly according to any one of claims 1-8, wherein the temperature control spring plate (4) is made of a nickel titanium memory alloy material.
  10. 10. A battery, characterized by comprising a battery cell, a housing and a cover plate assembly according to any one of claims 1-9, wherein the battery cell is arranged inside the housing, and the cover plate body (1) is connected with the battery cell.

Description

Cover plate assembly and battery Technical Field The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery. Background The battery is widely applied to daily life, industrial production and modern technology, and the battery includes apron, casing and electric core, is connected with utmost point post and conducting block on the apron, and the conducting block passes through utmost point post and electric core electricity to realize supplying power to external circuit. In order to improve the safety of the battery, protection devices such as an explosion-proof valve or an SSD are usually arranged on the cover plate, and when abnormal conditions occur in the battery, the protection devices can be triggered in time to discharge internal gas or cut off current so as to avoid accidents such as further thermal runaway and even explosion of the battery. However, the triggering of the explosion-proof valve and the SSD is irreversible, and once triggered, the protection devices are destroyed and cannot be recovered or reused, which not only results in waste of materials, but also makes the protection devices unable to continue to function after the first abnormal triggering of the battery, and is difficult to meet the requirements of the battery on high reliability and long service life. Disclosure of utility model The utility model aims to provide a cover plate assembly and a battery, which are used for solving the problem that a safety protection device on a battery cover plate is difficult to recycle. To achieve the purpose, the utility model adopts the following technical scheme: The cover plate assembly is connected with the battery cell and comprises a cover plate body and a pole, the pole is arranged on the cover plate body, a conductive block is connected with one end, away from the battery cell, of the pole, a temperature control elastic piece is arranged between the cover plate body and one end, facing the battery cell, of the pole, the temperature control elastic piece is in a deformation state and a reset state, and when the temperature control elastic piece is in the deformation state, the temperature control elastic piece is connected with the cover plate body and the pole to realize the electric connection of the cover plate body and the pole, and a refrigerating piece is connected with the conductive block. Preferably, the cover plate body faces the surface of the battery cell, the cover plate assembly further comprises lower plastic, the lower plastic is arranged on one side of the cover plate body facing the battery cell, the lower plastic corresponds to the position of the mounting groove, the connecting hole is formed in the position of the lower plastic, the temperature control elastic sheet comprises a fixing portion and a movable portion, the fixing portion is fixedly arranged in the mounting groove, the movable portion can selectively move along the direction close to or far away from the battery cell, and the mounting groove and the connecting hole jointly form a movable space for the movable portion to move. Preferably, the sectional area of the installation groove is larger than the sectional area of the connection hole. Preferably, the plurality of temperature control spring plates are provided, and the movable parts of the temperature control spring plates in the same mounting groove are arranged in opposite directions. Preferably, the cover plate assembly further comprises an upper plastic, the upper plastic is arranged between the conductive block and the cover plate body, and the refrigerating sheet is arranged around the outer side wall of the upper plastic. Preferably, the height of the refrigerating plate is smaller than the height of the upper plastic. Preferably, the refrigerating sheet is connected with a limiting block, and a limiting groove is formed in the position, corresponding to the limiting block, of the upper plastic, so that the refrigerating sheet is clamped with the upper plastic. Preferably, the limiting blocks are arranged in one-to-one correspondence with the limiting grooves, and a plurality of limiting blocks are arranged around the upper plastic intervals. Preferably, the temperature control spring plate is made of nickel-titanium memory alloy material. In a second aspect, a battery includes a battery cell, a housing, and a cover assembly as described above, where the battery cell is disposed inside the housing, and the cover body is connected to the battery cell. The utility model has the beneficial effects that: The cover plate assembly is connected with the battery core and comprises a cover plate body, a pole, a conductive block, a temperature control elastic piece and a refrigerating piece, wherein the pole is arranged on the cover plate body, the conductive block is connected with one end of the pole, which is far away from the battery core, the temperature control elastic piece is arranged betwe