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CN-224217560-U - Battery pack and electric equipment thereof

CN224217560UCN 224217560 UCN224217560 UCN 224217560UCN-224217560-U

Abstract

The utility model relates to the technical field of batteries and discloses a battery pack and electric equipment thereof, wherein the battery pack comprises a battery core and a liquid cooling assembly, and the battery core comprises a shell and a pole core; the shell comprises a first side wall and a second side wall, a pole core cavity is formed by encircling the first side wall and the second side wall, the pole core is contained in the pole core cavity, the first side wall comprises an expansion part and a connecting part, the two sides of the expansion part in the second direction are respectively connected with the second side wall through the connecting part, the expansion part protrudes out of the connecting part in the direction away from the pole core, an expansion groove is formed in one side of the expansion part, facing the pole core, of the expansion part, a first positioning opening is formed in the liquid cooling assembly, one end of the shell in the second direction is inserted into the first positioning opening, and the liquid cooling assembly is clamped in the shell. According to the battery pack and the electric equipment thereof, the liquid cooling component is clamped to the shell, so that the heat management efficiency is improved, meanwhile, the development of cell module supporting materials is saved, the weight reduction of the battery pack is realized, and the integral mechanical strength of the battery pack is improved.

Inventors

  • LIU JIANLONG
  • DONG TAO

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250401

Claims (12)

  1. 1. The battery pack is provided with a first direction (X), a second direction (Y) and a third direction (Z) which are intersected in pairs, and is characterized by comprising a battery cell (1) and a liquid cooling assembly (2), wherein the battery cell (1) comprises a shell (11) and a pole core (12); The housing (11) comprises two first side walls (111) which are oppositely arranged along the first direction (X) and two second side walls (112) which are oppositely arranged along the second direction (Y), the first side walls (111) and the second side walls (112) are enclosed to form a pole core cavity (1117), and the pole core (12) is accommodated in the pole core cavity (1117); The first side wall (111) comprises an expansion part (1111) and a connecting part (1112), the expansion part (1111) is connected with the second side wall (112) through the connecting part (1112) at two sides of the second direction (Y), the expansion part (1111) protrudes from the connecting part (1112) along the direction away from the pole core (12), and an expansion groove (1115) is formed in one side of the expansion part (1111) facing the pole core (12); The liquid cooling assembly (2) is provided with a first positioning opening (25), one end of the shell (11) in the second direction (Y) is inserted into the first positioning opening (25), and the liquid cooling assembly (2) is clamped with the shell (11).
  2. 2. The battery pack according to claim 1, wherein a projected area of the swelling portion (1111) on a plane perpendicular to the first direction (X) is cmm2, and a projected area of the connection portion (1112) on a plane perpendicular to the first direction (X) is dmm2, wherein c > d.
  3. 3. The battery pack according to claim 2, wherein the second side wall (112) has an area smaller than that of the first side wall (111).
  4. 4. The battery pack according to claim 1, wherein the liquid cooling assembly (2) comprises a first liquid cooling bracket (21), and the first liquid cooling bracket (21) is clamped with one end of the shell (11) in the second direction (Y).
  5. 5. The battery pack according to claim 4, wherein the first liquid cooling holders (21) are respectively engaged with the housing (11) at both ends in the first direction (X).
  6. 6. The battery pack according to claim 4, wherein the first liquid cooling support (21) includes a first manifold (211), a second manifold (212), and a plurality of first liquid cooling branches (213), the first manifold (211) and the second manifold (212) extend in the first direction (X), the plurality of first liquid cooling branches (213) extend in the third direction (Z) and are disposed at intervals in the first direction (X), the plurality of first liquid cooling branches (213) communicate with the first manifold (211) and the second manifold (212) at both ends of the third direction (Z), the adjacent first liquid cooling branches (213), the first manifold (211), and the second manifold (212) enclose to form the first positioning port (25), and the first liquid cooling branches (213) are engaged with the housing (11).
  7. 7. The battery pack according to claim 4, wherein the liquid cooling assembly (2) further comprises a second liquid cooling support (22), a first liquid cooling pipe (26), a second liquid cooling pipe (27) and a third liquid cooling pipe (28), the second liquid cooling support (22) is clamped at one end, far away from the first liquid cooling support (21), of the shell (11) in the second direction (Y), the first liquid cooling pipe (26) and the second liquid cooling pipe (27) are respectively communicated with the third liquid cooling pipe (28), the first liquid cooling support (21) is communicated with the first liquid cooling pipe (26), and the second liquid cooling support (22) is communicated with the second liquid cooling pipe (27).
  8. 8. The battery pack according to claim 6, wherein the first liquid cooling branch pipe (213) has a first liquid cooling surface (2131), the first liquid cooling surface (2131) faces the first positioning port (25), and the first liquid cooling surface (2131) is connected to the connecting portion (1112).
  9. 9. The battery pack according to claim 6, wherein the expansion portion (1111) includes a first expansion surface (11111) and a second expansion surface (11112), the second expansion surface (11112) is connected to the connection portion (1112) through the first expansion surface (11111) at both ends in the second direction (Y), the first liquid cooling branch pipe (213) has a second liquid cooling surface (2132), the second liquid cooling surface (2132) is located at one end of the first positioning port (25) in the second direction (Y), and the second liquid cooling surface (2132) is connected to the first expansion surface (11111).
  10. 10. The battery pack according to claim 6, wherein the first manifold (211) is provided with a third liquid-cooled surface (2111), the third liquid-cooled surface (2111) faces the first positioning opening (25), the housing (11) has a first end surface (113) at one end in the third direction (Z), and the third liquid-cooled surface (2111) is bonded to the first end surface (113).
  11. 11. The battery pack according to claim 6, wherein the second manifold (212) is provided with a fourth liquid-cooled surface (2121), the fourth liquid-cooled surface (2121) faces the first positioning opening (25), the case (11) has a second end surface (114) at one end in the third direction (Z), and the fourth liquid-cooled surface (2121) is bonded to the second end surface (114).
  12. 12. A powered device comprising a battery pack according to any one of claims 1-11.

Description

Battery pack and electric equipment thereof Technical Field The utility model relates to the technical field of batteries, in particular to a battery pack and electric equipment thereof. Background The existing battery pack needs to reserve enough space outside the battery cell to cope with the volume change of the battery cell caused by material expansion in the charge and discharge process, which not only increases the volume and weight of the battery pack, but also limits the improvement of the whole energy density of the battery system. Meanwhile, a cooling system of the power battery is important to guaranteeing the temperature stability of a battery pack, prolonging the service life of the battery and improving the safety. The traditional cooling mode may have the problems of low cooling efficiency, large material consumption, complex structure and the like, and is difficult to meet the urgent demands of the new energy automobile on efficient heat management, light weight and rapid heat exchange. Disclosure of utility model Aims at solving at least one of the technical problems existing in the prior art. The utility model provides a battery pack and electric equipment thereof, wherein an expansion part is arranged on a shell and is connected with a connecting part to limit an expansion space of a pole core, the expansion space is clamped on the shell through a liquid cooling assembly, so that the heat management efficiency is improved, meanwhile, the development of cell module supporting materials is saved, the weight reduction of the battery pack is realized, and the integral mechanical strength of the battery pack is improved. In order to achieve the above object, the present utility model provides a battery pack, which has a first direction, a second direction and a third direction intersecting each other in pairs, the battery pack has a first direction, a second direction and a third direction intersecting each other in pairs, and the battery pack comprises a battery cell and a liquid cooling assembly, the battery cell comprises a housing and a pole piece; The shell comprises two first side walls and two second side walls, the first side walls and the second side walls are oppositely arranged along the first direction, the first side walls and the second side walls are enclosed to form a pole core cavity, and the pole core is accommodated in the pole core cavity; The first side wall comprises an expansion part and a connecting part, the two sides of the expansion part in the second direction are respectively connected with the second side wall through the connecting part, the expansion part protrudes out of the connecting part along the direction deviating from the pole core, and an expansion groove is formed in one side of the expansion part facing the pole core; The liquid cooling assembly is provided with a first positioning opening, one end of the shell in the second direction is inserted into the first positioning opening, and the liquid cooling assembly is clamped with the shell. Preferably, the projection area of the expansion part on the plane perpendicular to the first direction is cmm 2, and the projection area of the connection part on the plane perpendicular to the first direction is dmm 2, wherein c > d. Preferably, the area of the second side wall is smaller than the area of the first side wall. Preferably, the liquid cooling assembly comprises a first liquid cooling bracket, and the first liquid cooling bracket is clamped with one end of the shell in the second direction. Preferably, the two ends of the shell in the first direction are respectively clamped with the first liquid cooling rack. As a preferred scheme, the first liquid cooling support includes first manifold, second manifold and a plurality of first liquid cooling branch pipe, first manifold with the second manifold is followed respectively the first direction is extended, and a plurality of first liquid cooling branch pipe is followed the third direction is extended and is followed the first direction interval sets up, a plurality of first liquid cooling branch pipe be in the both ends of third direction respectively with first manifold with the second manifold is linked together, adjacent first liquid cooling branch pipe, first manifold and the second manifold enclose and are closed and form first location mouth, first liquid cooling branch pipe joint in the casing. As the preferred scheme, the liquid cooling subassembly still includes second liquid cooling support, first liquid cooling pipe, second liquid cooling pipe and third liquid cooling pipe, second liquid cooling support joint in the casing is in the second direction is kept away from the one end of first liquid cooling support, first liquid cooling pipe with second liquid cooling pipe respectively with third liquid cooling pipe intercommunication, first liquid cooling support with first liquid cooling pipe intercommunication, second liquid cooling support with