Search

CN-224204290-U - Flow guide block, battery cell module, battery module and battery pack

CN224204290UCN 224204290 UCN224204290 UCN 224204290UCN-224204290-U

Abstract

The utility model provides a flow guide block, a battery cell module, a battery module and a battery pack. The guide block is used for realizing connection of the lug (7) and the busbar (8), the guide block comprises a body (1), a first electric connection area (2) and a second electric connection area (3) are arranged on the same side of the body (1), the first electric connection area (2) is electrically connected with the lug (7), the second electric connection area (3) is electrically connected with the busbar (8), the height of the first electric connection area (2) is lower than that of the second electric connection area (3), the height difference between the first electric connection area (2) and the second electric connection area (3) is larger than or equal to the thickness of the lug (7), and the first electric connection area (2) is electrically connected with the second electric connection area (3). The flow guide block can effectively avoid the cold joint phenomenon of the tab and the bus bar and improve the welding efficiency of the tab and the bus bar.

Inventors

  • LI MINGHUI

Assignees

  • 上海国轩新能源有限公司

Dates

Publication Date
20260505
Application Date
20250514

Claims (17)

  1. 1. The utility model provides a water conservancy diversion piece for realizing the connection of utmost point ear (7) with busbar (8), water conservancy diversion piece includes body (1), the same side of body (1) is provided with first electric connection district (2) and second electric connection district (3), first electric connection district (2) be constructed with utmost point ear (7) electricity is connected, second electric connection district (3) be constructed with busbar (8) electricity is connected, the height of first electric connection district (2) is less than the height of second electric connection district (3), the difference in height of first electric connection district (2) with second electric connection district (3) is greater than or equal to the thickness of utmost point ear (7), first electric connection district (2) with second electric connection district (3) electrically conducts and is connected.
  2. 2. The deflector block according to claim 1, characterized in that the first electrical connection zone (2) and the second electrical connection zone (3) are planar and/or that the side of the body (1) facing away from the first electrical connection zone (2) and the second electrical connection zone (3) is planar.
  3. 3. The deflector block according to claim 1, characterized in that the two opposite sides of the first electrical connection zone (2) are provided with the second electrical connection zone (3), respectively.
  4. 4. A diverter block as claimed in claim 3, characterized in that a through slot (4) is provided in the middle position of the first electrical connection zone (2), the through slot (4) extending from one of the second electrical connection zones (3) to the other of the second electrical connection zones (3) and dividing the first electrical connection zone (2) into a first partition (5) and a second partition (6), the angle between the arrangement direction of the first partition (5) and the second partition (6) and the arrangement direction of the second electrical connection zone (3) being larger than 45 °.
  5. 5. The deflector block according to claim 4, characterized in that the direction of arrangement of the first partition (5) and the second partition (6) is mutually perpendicular to the direction of arrangement of the second electrical connection area (3).
  6. 6. The deflector block of any of claims 1-5, wherein the deflector block is a conductive piece of conductive material.
  7. 7. A battery cell module, characterized by comprising a battery cell unit (10) and further comprising a guide block (9) according to any one of claims 1 to 6, wherein the battery cell unit (10) comprises a tab (7), and wherein the tab (7) is electrically connected with a first electrical connection region (2) of the guide block (9).
  8. 8. The cell module according to claim 7, wherein the number of the cell units (10) is at least one, the guide block (9) is located at the end of the cell unit (10), and the tab (7) is located in the first electrical connection region (2) and is welded and fixed with the first electrical connection region (2).
  9. 9. The battery cell module according to claim 8, wherein when the through groove (4) is formed in the middle position of the first electric connection area (2), at least one tab (7) of the battery cell unit (10) penetrates out of the through groove (4) and is welded and fixed after bending and attaching to the first electric connection area (2) on the side where the tab (7) is located, or the number of the battery cell units (10) is at least two, and at least two tabs (7) of the battery cell unit (10) are welded and fixed after bending and attaching to the first electric connection area (2) from the same side of the guide block (9), or the number of the battery cell unit (10) is at least two, and at least two tabs (7) of the battery cell unit (10) are welded and fixed after bending and attaching to the first electric connection area (2) from opposite sides of the guide block (9) respectively.
  10. 10. The battery cell module according to claim 7, wherein the number of the battery cell units (10) is at least one, the battery cell module further comprises a heat conducting shell (12), the battery cell units (10) are arranged in the heat conducting shell (12), an insulating piece (14) is arranged at the end part of the heat conducting shell, an avoidance groove (15) is formed in the insulating piece (14) corresponding to the electrode lug (7), the guide block (9) is fixedly arranged on the insulating piece (14), and the first electric connection area (2) of the guide block (9) is arranged corresponding to the avoidance groove (15).
  11. 11. The cell module according to claim 10, characterized in that the top and/or bottom of the thermally conductive housing (12) is provided with a stiffener (16) extending in the length direction of the thermally conductive housing (12).
  12. 12. A battery module comprising a busbar (8), characterized in that it further comprises a flow guiding block (9) according to any one of claims 1 to 6 or a cell module according to any one of claims 7 to 11, said busbar (8) being electrically connected to the second electrical connection zone (3) of the flow guiding block (9).
  13. 13. The battery module according to claim 12, wherein the busbar (8) comprises a first half-section (17) and a second half-section (18), the first half-section (17) and the second half-section (18) being connected by a bent section (19), the first half-section (17) and the second half-section (18) each comprising a third electrical connection section (20) electrically connected to the second electrical connection section (3), the first half-section (17) and the second half-section (18) being electrically connected to one of the flow-guiding blocks (9), respectively.
  14. 14. The battery module according to claim 13, wherein the first half-section (17) and the second half-section (18) are provided with one fixing hole (21), respectively, and the fixing holes (21) of the first half-section (17) and the fixing holes (21) of the second half-section (18) are diagonally arranged on the bus bar (8).
  15. 15. The battery module according to claim 12, further comprising an insulating bracket (22), wherein a mounting groove (23) and a spacing column (24) are provided on the insulating bracket (22), the bus bars (8) are mounted in the mounting groove (23), adjacent bus bars (8) are spaced by the spacing column (24), and the bus bars (8) are integrated on the insulating bracket (22) and form an integrated cover plate with the insulating bracket (22).
  16. 16. The battery module according to claim 15, further comprising an end plate (25) and a binding band (26), wherein the plurality of battery modules are stacked, the end plate (25) is disposed on two sides of the battery modules along the stacking direction of the battery modules, the binding band (26) is bound outside the end plate (25) and the battery modules, a base (27) is disposed on the end plate (25), an output electrode (28) is disposed at an end of the integrated cover plate, and the output electrode (28) is connected with the base (27).
  17. 17. A battery pack comprising the cell module of any one of claims 7 to 11 or the battery module of any one of claims 12 to 16.

Description

Flow guide block, battery cell module, battery module and battery pack Technical Field The utility model relates to the technical field of batteries, in particular to a flow guide block, a battery cell module, a battery module and a battery pack. Background With the continuous progress of energy technology, all-solid-state batteries gradually become research hot spots in the field of batteries due to the advantages of high energy density, safety, long service life and the like. Compared with the traditional liquid lithium ion battery, the all-solid-state battery adopts the solid electrolyte to replace inflammable liquid electrolyte, and the overall safety and reliability of the battery are greatly improved. Solid-state batteries exhibit significant advantages in safety, energy density, operating temperature range, and environmental performance due to the characteristics of their solid-state electrolytes, and become an important development direction for future battery technologies. However, current solid-state batteries face some technical challenges in terms of mass production, especially the connection and soldering process between the cells and the bus bars. The tab of the solid-state battery is usually made of a thin sheet material and has good conductivity, but when the conventional welding method is adopted, the tab is easily deformed due to insufficient supporting force, so that poor contact with the bus bar is caused, and a cold joint phenomenon is generated. The cold joint may cause degradation in battery performance including a decrease in conductivity, an increase in internal resistance, and a decrease in battery life. Disclosure of utility model The utility model mainly aims to provide a flow guide block, a battery cell module, a battery module and a battery pack, which can effectively avoid the cold joint phenomenon of the tab and the busbar and improve the welding efficiency of the tab and the busbar. In order to achieve the above object, according to an aspect of the present utility model, there is provided a flow guiding block for achieving connection of a tab with a bus bar, the flow guiding block including a body, a first electric connection region and a second electric connection region being provided on the same side of the body, the first electric connection region being configured to be electrically connected with the tab, the second electric connection region being configured to be electrically connected with the bus bar, a height of the first electric connection region being lower than a height of the second electric connection region, a height difference between the first electric connection region and the second electric connection region being greater than or equal to a thickness of the tab, the first electric connection region being electrically connected with the second electric connection region. Further, the first electrical connection region and the second electrical connection region are both planar, and/or one side of the body facing away from the first electrical connection region and the second electrical connection region is planar. Further, two opposite sides of the first electric connection region are respectively provided with a second electric connection region. Further, a through groove is formed in the middle of the first electric connection area, the through groove extends from one second electric connection area to the other second electric connection area, the first electric connection area is divided into a first partition area and a second partition area, and an included angle between the arrangement direction of the first partition area and the second partition area and the arrangement direction of the second electric connection area is larger than 45 degrees. Further, the arrangement direction of the first partition and the second partition is perpendicular to the arrangement direction of the second electric connection area. Further, the flow guide block is a conductive piece made of conductive materials. According to another aspect of the utility model, there is provided a battery cell module, including a battery cell unit and the above-mentioned current guiding block, where the battery cell unit includes a tab, and the tab is electrically connected with a first electrical connection area of the current guiding block. Further, the number of the battery cell monomers is at least one, the flow guide blocks are positioned at the end parts of the battery cell monomers, and the electrode lugs are positioned in the first electric connection area and welded and fixed with the first electric connection area. Further, when the through groove is formed in the middle of the first electric connection area, at least one tab of the electric core unit penetrates out of the through groove and is welded and fixed after being bent and attached to the first electric connection area on the side where the tab is located, or the number of the electric core units is at least two,