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CN-121983718-A - Battery device and electric equipment

CN121983718ACN 121983718 ACN121983718 ACN 121983718ACN-121983718-A

Abstract

The application discloses a battery device and electric equipment. The battery device includes a case, a battery cell assembly, and a thermal management component. Wherein, the box has accommodation space, and the box includes spacing roof beam. In the accommodation space was located to battery monomer subassembly, battery monomer subassembly was equipped with spacing roof beam along the both sides of first direction respectively, and battery monomer subassembly includes a plurality of battery monomers. The heat management component is arranged in the accommodating space and comprises a plurality of heat exchange pieces, the plurality of heat exchange pieces are arranged along the second direction, a battery monomer is connected between two adjacent heat exchange pieces in a heat conduction mode, the heat exchange pieces are respectively connected with limiting beams positioned on two sides of the battery monomer along the first direction, the first direction is intersected with the second direction, and a plane where the first direction and the second direction are located together is intersected with the height direction of the box body.

Inventors

  • LI CANCAN
  • LIU JIANGMING
  • MA JUN

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260408

Claims (12)

  1. 1. A battery device, characterized by comprising: The box body is provided with an accommodating space and comprises a limiting beam; The battery unit assembly is arranged in the accommodating space, the limiting beams are respectively arranged on two sides of the battery unit assembly along the first direction, and the battery unit assembly comprises a plurality of battery units; The heat management component is arranged in the accommodating space and comprises a plurality of heat exchange pieces, the plurality of heat exchange pieces are arranged along a second direction, the battery unit is arranged between two adjacent heat exchange pieces, the first direction is intersected with the second direction, and a plane where the first direction and the second direction are located together is intersected with the height direction of the box body; The heat exchange piece comprises a current collector and a body part, wherein the two ends of the body part along the first direction are respectively connected with the current collector, a heat exchange flow channel is arranged in the body part, the current collector at one end of the body part along the first direction is configured to supply heat exchange medium to the heat exchange flow channel, the current collector at the other end of the body part along the first direction is configured to guide out the heat exchange medium of the heat exchange flow channel, the limit beams at two sides of the heat exchange piece along the first direction are respectively a first limit beam and a second limit beam, the first limit beam is connected with the current collector at one end of the body part, and the second limit beam is connected with the current collector at the other end of the body part; The current collector comprises a first part and a second part, wherein the first part extends along the height direction of the box body, the second part extends along the second direction, and the first part is connected with the second part; The body part comprises a first heat exchange plate and a second heat exchange plate, the heat exchange flow channels are formed in the first heat exchange plate and the second heat exchange plate, the first part is connected with the first heat exchange plate, the second part is connected with the second heat exchange plate, and at least one of the first part and the second part is connected with the limiting beam.
  2. 2. The battery device of claim 1, wherein the current collector is welded to the retention beam.
  3. 3. The battery device according to claim 2, wherein, in the second direction, both sides of the current collector and the side wall of the stopper beam are provided with chamfers at positions intersecting each other, the chamfers being filled with weld joints.
  4. 4. The battery device according to claim 1, wherein the limiting beam is provided with grooves facing the walls of the battery cells, one for each current collector, the grooves accommodating at least part of the current collectors.
  5. 5. The battery device of claim 4, wherein the current collector has a projection projecting in the first direction, and the recess receives at least a portion of the projection.
  6. 6. The battery device according to claim 5, wherein the limiting beam is provided with a cavity, the groove is communicated with the cavity, the current collectors of two adjacent heat exchange pieces are communicated in series or in parallel through a pipeline, and part of the pipeline is arranged in the cavity; And/or the groove penetrates through the top of the wall body; And/or the current collectors at the two ends of the body part along the first direction are a first current collector and a second current collector respectively, and the size of the protruding part of the first current collector is equal to the size of the protruding part of the second current collector along the second direction; And/or the current collectors at the two ends of the body part along the first direction are configured to be connected with any one of the limit beams.
  7. 7. The battery device according to claim 1, wherein the two sides of the battery cell along the second direction are respectively and thermally connected with the first heat exchange plate, the first heat exchange plate is internally provided with a containing cavity, a first flow guide rib and a plurality of second flow guide ribs, the first flow guide ribs and the plurality of second flow guide ribs are respectively arranged in the containing cavity, the containing cavity penetrates through the two ends of the first heat exchange plate along the first direction, the two ends of the first heat exchange plate along the first direction are respectively connected with the current collector, the first flow guide ribs are positioned on one side of the second flow guide ribs along the first direction, the plurality of second flow guide ribs are arranged at intervals along the height direction of the box body and extend along the first direction, and the heat exchange flow passage comprises a first heat exchange flow passage, and the first flow guide ribs, the plurality of second flow guide ribs, the wall body of the containing cavity and the current collector are jointly enclosed to form the bent first heat exchange flow passage.
  8. 8. The battery device according to claim 7, wherein the first heat exchange plate and the second heat exchange plate are intersected and connected with each other, the second heat exchange plate is arranged on one side of the battery cell and is in heat conduction connection with the battery cell along the height direction of the box body, the heat exchange flow channel comprises a second heat exchange flow channel, the second heat exchange flow channel is arranged inside the second heat exchange plate, and the first heat exchange flow channel is communicated with the second heat exchange flow channel.
  9. 9. The battery device according to claim 8, wherein two heat exchange members farthest from each other in the second direction are first heat exchange members, and the heat exchange member between two first heat exchange members is a second heat exchange member; In the same first heat exchange piece, the side surface of the first heat exchange plate deviating from the battery monomer is flush with one end of the second heat exchange plate deviating from the battery monomer, and/or in the same second heat exchange piece, along the second direction, both side surfaces of the first heat exchange plate and both ends of the second heat exchange plate along the second direction are arranged at intervals.
  10. 10. The battery device according to claim 9, wherein the case includes mounting beams for mounting the battery device, the mounting beams are provided on both sides of the battery cell assembly in the second direction, the first heat exchanging member is connected to the mounting beams, and/or the second heat exchanging plate of each of the heat exchanging members constructs a bottom wall of the case.
  11. 11. The battery device of any one of claims 1-10, wherein the battery cell has a first side and a second side, the first side having an area greater than an area of the second side, the first side disposed facing the spacing beam.
  12. 12. A powered device comprising a battery device according to any of claims 1-11 for providing electrical energy to the powered device.

Description

Battery device and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a battery device and electric equipment. Background In the cyclic charge and discharge process of the battery monomer in the battery, the case of the battery can bear repeated expansion force, so that the case bears periodic load for a long time, and the problem of the decrease of the strength of the case is caused, so that the case is easy to crack, deform seriously and the like. Disclosure of Invention In view of the above problems, the application provides a battery device and electric equipment, wherein the current collector is connected with the limiting beam, so that the strength of the limiting beam can be improved, the capacity of limiting Liang Dikang battery single body expansion force can be enhanced, and the strength of the box body can be improved. In a first aspect, the present application provides a battery device comprising: the box body is provided with an accommodating space and comprises a limiting beam; the battery cell assembly is arranged in the accommodating space, two sides of the battery cell assembly along the first direction are respectively provided with a limiting beam, and the battery cell assembly comprises a plurality of battery cells; the heat management component is arranged in the accommodating space and comprises a plurality of heat exchange pieces, the plurality of heat exchange pieces are arranged along a second direction, a battery monomer is arranged between two adjacent heat exchange pieces, the first direction is intersected with the second direction, and a plane where the first direction and the second direction are located together is intersected with the height direction of the box body; the heat exchange piece comprises a current collector and a body part, wherein the two ends of the body part along the first direction are respectively connected with the current collector, the heat exchange flow channel is arranged in the body part, the current collector at one end of the body part along the first direction is configured to supply heat exchange media to the heat exchange flow channel, the current collector at the other end of the body part along the first direction is configured to guide out the heat exchange media of the heat exchange flow channel, the limiting beams positioned at the two sides of the heat exchange piece along the first direction are a first limiting beam and a second limiting beam respectively, the first limiting beam is connected with the current collector at one end of the body part, and the second limiting beam is connected with the current collector at the other end of the body part. According to the battery device, the current collectors are arranged at the two ends of the body part along the first direction, so that connection among a plurality of heat exchange pieces is facilitated, and meanwhile, the current collector of each heat exchange piece is connected with the limiting beam, so that the strength of the limiting beam is improved, the capacity of limiting Liang Dikang battery single expansion force is improved, and the overall strength and rigidity of the box body are improved. In some embodiments, the current collector includes a first portion extending in a height direction of the case and a second portion extending in a second direction, the first portion and the second portion being connected; The body part comprises a first heat exchange plate and a second heat exchange plate, the interiors of the first heat exchange plate and the second heat exchange plate are respectively provided with a heat exchange flow passage, the first part is connected with the first heat exchange plate, the second part is connected with the second heat exchange plate, and at least one of the first part and the second part is connected with the limiting beam. The first heat exchange plate and the second heat exchange plate are intersected and connected with each other, so that the rigidity and strength of the body part can be increased, the capacity of limiting Liang Dikang of the expansion force of the battery monomer is further improved, deformation of the box body is reduced, and meanwhile, the first heat exchange plate and the second heat exchange plate can exchange heat with two sides of the battery monomer, so that the heat exchange effect of the heat management component and the battery monomer is improved. In some embodiments, the current collector is connected to the spacing beam by welding. Compared with the detachable connection mode, the current collector and the limiting beam are fixed in a welding mode, and under the vibration occasion, looseness and abnormal sound and abrasion between the limiting beam and the current collector can be prevented, the possibility of leakage of the current collector caused by mutual abrasion between the looseness and the limiting beam is reduced, and the working reliability i