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CN-122025931-A - Battery pack and electric automobile

CN122025931ACN 122025931 ACN122025931 ACN 122025931ACN-122025931-A

Abstract

The application relates to a battery pack and an electric automobile, wherein the battery pack comprises a box body; the electric vehicle comprises a box body, a cooling plate and a bracket assembly, wherein the box body is provided with a mounting plate, the cooling plate is positioned below the box body along the height direction, the bracket assembly is positioned below the cooling plate along the height direction and fixedly connected to the box body, and the bracket assembly is used for being in direct contact with the mounting plate of the electric vehicle. When the battery pack is used for an electric vehicle, the bracket assembly separates the cooling plate from the mounting plate of the electric vehicle, so that the cooling plate does not need to directly exchange heat with the mounting plate, the influence of the temperature of the mounting plate on the cooling plate is reduced, and the cooling or heating efficiency of the cooling plate on the battery in the box body is improved.

Inventors

  • CHEN XINGDI
  • WANG PENG
  • ZHOU LINGGANG

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20180614

Claims (10)

  1. 1. A battery pack for an electric vehicle, comprising: case (1) A cooling plate (2) located below the case (1) in the height direction (H), the cooling plate being located outside the case (1); the battery pack is characterized in that the battery pack further comprises: A bracket assembly (3) located below the cooling plate (2) along the height direction (H) and fixedly connected to the box body (1), wherein the bracket assembly (3) is used for being in direct contact with a mounting plate of an electric automobile, and the bracket assembly (3) separates the cooling plate (2) from the mounting plate; the bracket assembly (3) comprises: at least two stringers (31) arranged at intervals in the width direction (W), and At least two crossbeams (32) are arranged at intervals along the length direction (L), and two crossbeam ends (321) of each crossbeam (32) in the width direction (W) are respectively and fixedly connected with a corresponding longitudinal beam (31).
  2. 2. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells, The cooling plate (2) comprises a main body (21), and a plurality of first mounting parts (22), wherein each first mounting part (22) is formed on the main body (21) in a protruding manner; Each of the side members (31) has a plurality of second mounting portions (312) formed on a side of the side member (31) facing the cooling plate (2), and each of the second mounting portions (312) is fitted to and fixedly connected to a corresponding one of the first mounting portions (22) of the cooling plate (2).
  3. 3. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells, The cooling plate (2) further has a plurality of first engaging portions (23) formed on a side of the cooling plate (2) facing the bracket assembly (3) and arranged at intervals in the width direction (W); Each of the cross members (32) further has a plurality of second engaging portions (322) formed on a side of the cross member (32) facing the cooling plate (2) and arranged at intervals in the width direction (W), and each of the second engaging portions (322) is engaged with a corresponding one of the first engaging portions (23) in a concavo-convex manner.
  4. 4. A battery pack according to claim 3, wherein each of the first fitting portions (23) of the cooling plate (2) is formed in a U-shaped structure; The plurality of second engaging portions (322) of each of the cross members (32) are formed in a zigzag structure.
  5. 5. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells, Each of the side members (31) further includes a plurality of third mounting portions (313) formed on a side of the side member (31) facing the cooling plate (2) and disposed at intervals along the longitudinal direction (L), and each of the third mounting portions (313) is fixedly connected to one of the beam ends (321) corresponding to the beam (32).
  6. 6. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells, The bracket assembly (3) further comprises a protection beam (33) fixedly connected with a longitudinal beam end (311) of each longitudinal beam (31) in the length direction (L) for protecting the cooling plate (2) in the length direction (L).
  7. 7. The battery pack of claim 6, wherein the battery pack comprises a plurality of battery cells, Each of the side members (31) further has a fourth mounting portion (314) formed on a side of the side member end portion (311) facing the cooling plate (2) and fixedly connected to the protection beam (33).
  8. 8. The battery pack according to claim 6, wherein the protection beam (33) has: A flat plate portion (332) arranged side by side with at least two of the beams (32), and And a side plate part (333) protruding from the flat plate part (332) in the height direction (H) and located on one side of the cooling plate (2) in the longitudinal direction (L) so as to protect the cooling plate (2) in the longitudinal direction (L).
  9. 9. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells, Each of the stringers (31) further has: a support part (315) formed on one side of the longitudinal beam (31) in the width direction (W) and extending along the width direction (W), and And a mounting portion (316) formed on the other side of the side member (31) in the width direction (W) and extending in the width direction (W).
  10. 10. An electric automobile is characterized in that, The electric vehicle comprising the battery pack according to any one of claims 1 to 9.

Description

Battery pack and electric automobile Technical Field The application relates to the technical field of batteries, in particular to a battery pack and an electric automobile. Background The normal ideal working temperature of the battery in the battery pack is 20-35 ℃, and in order to ensure the normal service life of the battery in high-cold and high-heat environments, the battery pack is required to be subjected to heat management design, and the working temperature of the battery is regulated by heating or cooling. In order to adjust the working temperature of the battery when the battery pack works, the conventional battery pack is commonly used in the aspects that (1) a cooling plate is arranged inside a box body of the battery pack, and (2) the cooling plate is arranged outside the box body of the battery pack. For the mode that the cooling plate is arranged in the box body, the existing structure of the battery pack needs to be redesigned, and the space in the box body is relatively tense, so that great pressure is caused on the design. Meanwhile, if the cooling liquid in the cooling plate leaks in the long-term use process of the battery pack, on one hand, the cooling liquid can lead the shell of the battery to be communicated with the metal parts of the box body, the insulation resistance value of the whole box body is reduced, and on the other hand, the cooling liquid can accelerate the corrosion process of the metal parts of the box body, so that potential safety hazards are generated. For the mode that the cooling plate is arranged outside the box body, although the problem of influence on the box body of the battery pack caused by space utilization inside the box body and leakage of cooling liquid is solved, when the battery pack is used in an electric automobile, the cooling plate of the battery pack can be in direct contact with the mounting plate of the electric automobile. And because the temperature of mounting panel is close with the external environment temperature of electric automobile, when electric automobile is in high and cold and high heat environment, the mounting panel also can carry out the heat exchange with the cooling plate to the cooling plate has reduced the cooling or the heating efficiency of the battery of box inside. Disclosure of Invention In view of the problems in the prior art, an object of the present invention is to provide a battery pack and an electric vehicle, in which a bracket assembly of the battery pack separates a cooling plate from a mounting plate of the electric vehicle, and the influence of the temperature of the mounting plate on the cooling plate is reduced, thereby improving the cooling or heating efficiency of the cooling plate. The invention provides a battery pack for an electric automobile, which comprises a box body, a cooling plate and bracket components, wherein the cooling plate is positioned below the box body along the height direction, the bracket components are positioned below the cooling plate along the height direction and fixedly connected to the box body and are used for being in direct contact with a mounting plate of the electric automobile, the bracket components comprise at least two longitudinal beams which are arranged at intervals along the width direction, and at least two transverse beams which are arranged at intervals along the length direction, and the end parts of the two transverse beams which are positioned in the width direction of each transverse beam are respectively fixedly connected with a corresponding longitudinal beam. In one embodiment, the cooling plate has a main body portion and a plurality of first mounting portions, each of which is formed protruding from the main body portion. Each longitudinal beam has a plurality of second mounting portions formed on a side of the longitudinal beam facing the cooling plate, each second mounting portion being fitted with and fixedly connected to a corresponding one of the first mounting portions of the cooling plate. In one embodiment, the cooling plate further has a plurality of first engaging portions formed at a side of the cooling plate facing the bracket assembly and spaced apart in a width direction. Each cross beam is also provided with a plurality of second matching parts which are formed on one side of the cross beam facing the cooling plate and are arranged at intervals along the width direction, and each second matching part is matched with a corresponding first matching part in a concave-convex mode. In one embodiment, each first mating portion of the cooling plate is formed in a U-shaped configuration. The plurality of second mating portions of each cross beam are formed in a zigzag structure. In one embodiment, each longitudinal beam is further provided with a plurality of third mounting parts formed on one side of the longitudinal beam facing the cooling plate and arranged at intervals along the length direction, and each third mounting part is fixedly c