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CN-122025953-A - Battery cell cover plate and battery cell

CN122025953ACN 122025953 ACN122025953 ACN 122025953ACN-122025953-A

Abstract

The invention relates to the technical field of batteries, and provides a battery cell cover plate and a battery cell. The battery core cover plate comprises a cover plate body, reinforcing ribs and reinforcing ribs, wherein a reference surface is formed on one side of the cover plate body, supporting bosses and mounting bosses are formed on the reference surface and are arranged along the length direction of the cover plate body, the supporting bosses and the mounting bosses are outwards convexly arranged on the reference surface in the direction away from the reference surface, the height of the mounting bosses relative to the reference surface is larger than that of the supporting bosses relative to the reference surface, and the reinforcing ribs are arranged on the supporting bosses and/or the mounting bosses and outwards protrude in the direction away from the reference surface. According to the battery cell cover plate provided by the embodiment, the double-layer reinforcing structure is formed by arranging the support boss with the height difference and the mounting boss, so that the overall rigidity and the bending strength of the cover plate body in the length direction are obviously improved. The reinforcing ribs arranged on the boss further play a supporting role, and effectively disperse and offset stress generated by external extrusion or vibration impact.

Inventors

  • XIN XUEQIAN
  • ZHANG FANGNAN

Assignees

  • 蜂巢能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260203

Claims (10)

  1. 1. A cell cover plate, comprising: The cover plate comprises a cover plate body, wherein one side of the cover plate body is provided with a reference surface, a supporting boss and a mounting boss which are arranged along the length direction of the cover plate body are formed on the reference surface, the supporting boss and the mounting boss are outwards convexly arranged on the reference surface in the direction away from the reference surface, and the height of the mounting boss relative to the reference surface is larger than that of the supporting boss relative to the reference surface; and the reinforcing ribs are arranged on the supporting boss and/or the mounting boss, and the reinforcing ribs are outwards protruded in a direction away from the datum plane.
  2. 2. The cell cover of claim 1, wherein the reinforcing ribs comprise: the first reinforcing ribs are arranged on at least one side edge of the support boss and the mounting boss along the width direction of the cover plate body.
  3. 3. The cell cover plate according to claim 2, further comprising an explosion-proof valve disposed within the mounting boss; the reinforcing ribs also comprise second reinforcing ribs which are arranged on the periphery of the mounting boss corresponding to the explosion-proof valve; the first reinforcing rib is provided with a first exhaust notch, the second reinforcing rib is provided with a second exhaust notch, and the first exhaust notch and the second exhaust notch are correspondingly arranged.
  4. 4. The cell cover plate according to claim 3, wherein the mounting boss is provided with a mounting groove, and the explosion-proof valve is arranged in the mounting groove; the length of the first exhaust notch and the length of the second exhaust notch along the length direction of the cover plate body are L2, and the length of the mounting groove along the length direction of the cover plate body is L1, wherein L2/L1 is more than or equal to 0.55 and less than or equal to 0.75.
  5. 5. The cell cover plate according to claim 3, wherein the first reinforcing ribs protrude a distance h from the corresponding support boss and mounting boss, and the second reinforcing ribs protrude a distance h from the corresponding mounting boss, and h is 0.5 mm≤h≤1 mm.
  6. 6. The cell cover plate of claim 4, wherein the orthographic projection area of the first reinforcing rib and the second reinforcing rib on the reference surface is S1, and the orthographic projection area of the mounting boss on the reference surface is S, and S1/S is 0.1 is less than or equal to 0.15.
  7. 7. The cell cover plate according to claim 4, wherein the reinforcing ribs further comprise third reinforcing ribs which are arranged in the mounting groove in a grid shape; the width of the third reinforcing rib is b, b is more than or equal to 2mm and less than or equal to 3mm, the orthographic projection area of the third reinforcing rib on the reference surface is S3, and the orthographic projection area of the mounting groove on the reference surface is S2, and S3/S2 is more than or equal to 0.2 and less than or equal to 0.32.
  8. 8. The cell cover of claim 1, the battery cell cover plate is characterized by further comprising: And in the height direction of the cover plate body, the height of the reinforcing rib relative to the reference surface is larger than the height of the pole protruding from the reference surface.
  9. 9. The cell cover plate according to any one of claims 1 to 8, wherein two support bosses are provided, two support bosses are located at both ends of the mounting boss in the length direction of the cover plate body, and the reinforcing ribs are provided on two support bosses and the mounting boss; A gluing area is arranged on the supporting boss; the battery cell cover plate further comprises structural adhesive, wherein the structural adhesive is arranged in the adhesive coating area, and the relative position of the structural adhesive to the reference surface is larger than the height of the mounting boss to the reference surface.
  10. 10. A kind of electric core, characterized by comprising the following steps: The battery cell shell is provided with an opening; the cell cover plate according to any one of claims 1 to 9, wherein the cell cover plate is arranged on the opening and surrounds the cell shell to form a containing cavity; the pole group is arranged in the accommodating cavity.

Description

Battery cell cover plate and battery cell Technical Field The invention relates to the technical field of batteries, in particular to a battery cell cover plate and a battery cell. Background In existing battery modules or packs, the cells are typically connected to an upper case or other structural member by a cover plate. Most of the common cover plates at present are of flat plate structures or simple single-layer boss structures. The cover plate of the flat plate or the simple boss structure has weak overall rigidity. When the battery pack is subjected to external extrusion or vibration impact, the cover plate is easily deformed. Can directly transmit to explosion-proof valve and the utmost point post of welding on the apron, probably lead to explosion-proof valve mistake to open or sealed inefficacy, utmost point post is not hard up or insulation damage brings serious potential safety hazard. Meanwhile, the bending and compression resistance of the cover plate is insufficient, and the structural strength of the whole battery pack is limited. Disclosure of Invention The invention provides a battery cell cover plate and a battery cell, which are used for solving the problems that a cover plate with a flat plate or simple boss structure is easy to deform, the bending resistance and the compression resistance of the cover plate are insufficient, and the structural strength of the whole battery pack is limited. The invention provides a battery cell cover plate, comprising: The cover plate comprises a cover plate body, wherein one side of the cover plate body is provided with a reference surface, a supporting boss and a mounting boss which are arranged along the length direction of the cover plate body are formed on the reference surface, the supporting boss and the mounting boss are outwards convexly arranged on the reference surface in the direction away from the reference surface, and the height of the mounting boss relative to the reference surface is larger than that of the supporting boss relative to the reference surface; and the reinforcing ribs are arranged on the supporting boss and/or the mounting boss, and the reinforcing ribs are outwards protruded in a direction away from the datum plane. According to the invention, the cell cover plate, the reinforcing rib comprises: the first reinforcing ribs are arranged on at least one side edge of the support boss and the mounting boss along the width direction of the cover plate body. The invention provides a battery cell cover plate, which further comprises an explosion-proof valve, a connecting piece and a connecting piece, wherein the explosion-proof valve is arranged in the installation boss; the reinforcing ribs also comprise second reinforcing ribs which are arranged on the periphery of the mounting boss corresponding to the explosion-proof valve; the first reinforcing rib is provided with a first exhaust notch, the second reinforcing rib is provided with a second exhaust notch, and the first exhaust notch and the second exhaust notch are correspondingly arranged. According to the battery cell cover plate provided by the invention, the mounting boss is provided with the mounting groove, and the explosion-proof valve is arranged in the mounting groove; the length of the first exhaust notch and the length of the second exhaust notch along the length direction of the cover plate body are L2, and the length of the mounting groove along the length direction of the cover plate body is L1, wherein L2/L1 is more than or equal to 0.55 and less than or equal to 0.75. According to the battery cell cover plate provided by the invention, the protruding distance of the first reinforcing ribs on the corresponding supporting boss and the corresponding mounting boss is h, and the protruding distance of the second reinforcing ribs on the corresponding mounting boss is h, wherein h is more than or equal to 0.5mm and less than or equal to 1mm. According to the battery cell cover plate provided by the invention, the orthographic projection area of the first reinforcing rib and the second reinforcing rib on the reference surface is S1, and the orthographic projection area of the mounting boss on the reference surface is S, wherein S1/S is more than or equal to 0.1 and less than or equal to 0.15. The invention provides a battery cell cover plate, which further comprises a third reinforcing rib, a second reinforcing rib and a third reinforcing rib, wherein the third reinforcing rib is arranged in the mounting groove in a grid shape; the width of the third reinforcing rib is b, b is more than or equal to 2mm and less than or equal to 3mm, the orthographic projection area of the third reinforcing rib on the reference surface is S3, and the orthographic projection area of the mounting groove on the reference surface is S2, and S3/S2 is more than or equal to 0.2 and less than or equal to 0.32. According to the invention, the battery cell cover plate further comprises: And in t