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CN-122000544-A - Battery module, battery pack and electric equipment

CN122000544ACN 122000544 ACN122000544 ACN 122000544ACN-122000544-A

Abstract

The invention discloses a battery module, a battery pack and electric equipment, wherein the battery module comprises a battery cell group and a shell, the battery cell group is provided with a plurality of battery cells stacked along a first direction, the shell is provided with a containing cavity for containing the battery cell group, the shell comprises two side plates, the two side plates are respectively arranged on two sides of the battery cell group along a second direction, the second direction is intersected with the first direction, at least one of the two side plates is provided with a heat exchange runner so that the side plates are configured as heat exchange pieces, and each battery cell exchanges heat with the heat exchange pieces. From this, through be equipped with the heat transfer runner in the curb plate so that the curb plate structure is the heat transfer spare for the curb plate can directly exchange heat with electric core group, does benefit to and reduces thermal resistance, improves heat exchange efficiency, and can shorten the heat conduction route, strengthens battery module's accuse temperature ability, has promoted battery module's wholeness ability.

Inventors

  • HUANG WEI
  • XIONG YONG
  • HU JIAHAO
  • XU WEI
  • HE QINGLIN

Assignees

  • 比亚迪股份有限公司

Dates

Publication Date
20260508
Application Date
20251225

Claims (15)

  1. 1. A battery module (100), characterized by comprising: The battery cell group (1), the battery cell group (1) is provided with a plurality of battery cells (11) stacked along a first direction (F1); The battery cell module comprises a shell body (2), wherein the shell body (2) is provided with a containing cavity for containing the battery cell group (1), the shell body (2) comprises two side plates (21), the two side plates (21) are respectively arranged on two sides of the battery cell group (1) along a second direction (F2), the second direction (F2) is intersected with the first direction (F1), at least one of the two side plates (21) is provided with a heat exchange flow channel (33) so that the side plates (21) are configured into heat exchange pieces (3), and each battery cell (11) is in heat exchange with the heat exchange pieces (3).
  2. 2. The battery module (100) according to claim 1, wherein a heat conductive adhesive layer (4) is sandwiched between the heat exchanging member (3) and the cell group (1).
  3. 3. The battery module (100) according to claim 2, wherein the thickness of the heat conductive adhesive layer (4) ranges from 1mm to 1.5mm.
  4. 4. The battery module (100) according to claim 1, wherein at least part of the heat exchange flow channel (33) is arranged extending in the first direction (F1).
  5. 5. The battery module (100) according to claim 2, wherein the housing (2) further comprises a water nozzle (24), the water nozzle (24) is provided on one side of the side plate (21) along the first direction (F1), the water nozzle (24) is provided with an inlet (241) and an outlet (242), and the heat exchange flow channel (33) is respectively communicated with the inlet (241) and the outlet (242).
  6. 6. The battery module (100) according to claim 5, wherein the heat exchange flow channel (33) includes an inlet flow channel (331) and an outlet flow channel (332), the inlet flow channel (331) extends along the first direction (F1), the outlet flow channel (332) extends along the first direction (F1), the inlet flow channel (331) and the outlet flow channel (332) are arranged along a third direction (F3), the third direction (F3) intersects the first direction (F1) and the second direction (F2), respectively, the inlet flow channel (331) communicates with the inlet port (241), and the outlet flow channel (332) communicates with the outlet port (242).
  7. 7. The battery module (100) according to claim 6, wherein the case (2) further includes a communication pipe (25), the communication pipe (25) includes a first communication pipe (251) and a second communication pipe (252), the first communication pipe (251) and the second communication pipe (252) are respectively provided at both ends of the side plate (21) in the first direction (F1), the first communication pipe (251) is configured to communicate the inflow flow channel (331) and the outflow flow channel (332) with the water nozzle (24), respectively, and the second communication pipe (252) is configured to communicate the inflow flow channel (331) and the outflow flow channel (332).
  8. 8. The battery module (100) according to claim 1, wherein the heat exchanging member (3) is an integrally extruded member, or the heat exchanging member (3) comprises a temperature equalizing plate (31) and a harmonica tube (32), the temperature equalizing plate (31) exchanges heat with each electric core (11), the harmonica tube (32) is arranged on one side of the temperature equalizing plate (31) away from the electric core group (1), and the harmonica tube (32) defines the heat exchanging flow channel (33).
  9. 9. The battery module (100) according to claim 1, wherein the minimum wall thickness of the heat exchanging member (3) is not less than 5mm.
  10. 10. The battery module (100) according to any one of claims 1-9, wherein the housing (2) comprises two end plates (22), the two end plates (22) being respectively arranged at two sides of the battery cell group (1) along the first direction (F1) and fixedly connected with the side plates (21), and the end plates (22) being adapted for a limited fit with the battery cell group (1).
  11. 11. The battery module (100) according to claim 10, wherein the flatness of the side of the end plate (22) for contact-fitting with the cell group (1) is 0.2mm or less, and/or the minimum thickness of the end plate (22) is not less than 10mm.
  12. 12. The battery module (100) according to claim 10, wherein at least one of the end plates (22) is provided with an end plate flow channel (221), the end plate flow channel (221) being in heat exchange with at least the cell (11) located at an end in the first direction (F1), the end plate flow channel (221) being in communication with the heat exchange flow channel (33), or the end plate flow channel (221) being provided independently of the heat exchange flow channel (33).
  13. 13. A battery pack (1000) comprising a case (200) and the battery module (100) according to any one of claims 1-12, the case (200) being provided with a mounting cavity (201), the battery module (100) being mounted in the mounting cavity (201).
  14. 14. The battery pack (1000) according to claim 13, wherein the battery modules (100) are plural, the case (200) is provided with water inlet and outlet ports (202), and the water inlet and outlet ports (202) are respectively communicated with the heat exchange flow passages (33) of the plural battery modules (100) through connection pipes.
  15. 15. A powered device, comprising a battery pack (1000) according to claim 13 or 14.

Description

Battery module, battery pack and electric equipment Technical Field The invention relates to the technical field of batteries, in particular to a battery module, a battery pack and electric equipment. Background In the related art, the shell of the battery pack generally comprises a tray and a liquid cooling plate, wherein the liquid cooling plate is independently arranged at the bottom of the tray, the battery cell is borne on the tray, and the liquid cooling plate is positioned at the bottom of the tray and used for exchanging heat with the battery cell. But because of the structural limitation, heat can be taken away only by passing through the module bottom plate and the tray from the inside of the battery cell, so that the thermal resistance is large, the efficiency is low, the heat conduction path is overlong, the temperature control capability is poor, and an improvement space exists. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the battery module, the side plate can directly exchange heat with the battery cell group, so that the heat resistance is reduced, the heat exchange efficiency is improved, the heat conduction path can be shortened, and the temperature control capability of the battery module is enhanced. The battery module comprises a battery cell group and a shell, wherein the battery cell group is provided with a plurality of battery cells stacked along a first direction, the shell is provided with a containing cavity for containing the battery cell group, the shell comprises two side plates, the two side plates are respectively arranged on two sides of the battery cell group along a second direction, the second direction is intersected with the first direction, at least one of the two side plates is provided with a heat exchange flow channel, the side plates are made to be heat exchange pieces, and each battery cell is in heat exchange with the heat exchange pieces. According to the battery module provided by the embodiment of the invention, the heat exchange flow channel is arranged in the side plate, so that the side plate is constructed as the heat exchange piece, the side plate can directly exchange heat with the battery cell group, the heat resistance is reduced, the heat exchange efficiency is improved, the heat conduction path can be shortened, the temperature control capability of the battery module is enhanced, and the overall performance of the battery module is improved. According to some embodiments of the invention, a heat conductive adhesive layer is sandwiched between the heat exchange member and the battery cell group. According to the battery module of some embodiments of the present invention, the thickness of the heat conductive adhesive layer ranges from 1mm to 1.5mm. According to the battery module of some embodiments of the present invention, at least a portion of the heat exchange flow channel is disposed to extend along the first direction. According to the battery module of some embodiments of the present invention, the housing further includes a water tap, the water tap is disposed on one side of the side plate along the first direction, the water tap is provided with an inlet and an outlet, and the heat exchange flow channel is respectively communicated with the inlet and the outlet. According to some embodiments of the invention, the heat exchange flow channel comprises an inlet flow channel and an outlet flow channel, the inlet flow channel extends along the first direction, the outlet flow channel extends along the first direction, the inlet flow channel and the outlet flow channel are arranged along a third direction, the third direction intersects with the first direction and the second direction respectively, the inlet flow channel is communicated with the inlet port, and the outlet flow channel is communicated with the outlet port. According to some embodiments of the invention, the housing further includes a communicating tube, the communicating tube includes a first communicating tube and a second communicating tube, the first communicating tube and the second communicating tube are respectively disposed at two ends of the side plate along the first direction, the first communicating tube is used for communicating the inflow channel and the outflow channel with the water tap, respectively, and the second communicating tube is used for communicating the inflow channel and the outflow channel. According to the battery module, the heat exchange piece is an integral extrusion molding piece, or the heat exchange piece comprises a temperature equalizing plate and a harmonica tube, the temperature equalizing plate exchanges heat with each battery cell, the harmonica tube is arranged on one side, away from the battery cell group, of the temperature equalizing plate, and the harmonica tube is internally provided with the heat exchange flow channel.