CN-122000545-A - Battery device and electric equipment

Abstract

The application discloses a battery device and electric equipment. The battery device comprises a battery unit assembly and a heat management component, wherein the battery unit assembly comprises a plurality of battery units, the battery unit assembly is provided with a height direction, the heat management component comprises a plurality of heat exchange pieces arranged along a first direction, battery units are arranged between two adjacent heat exchange pieces, each heat exchange piece comprises a heat exchange vertical plate and a heat exchange transverse plate, the two ends of each heat exchange vertical plate are respectively connected with the heat exchange transverse plates along the height direction of the battery unit assembly, the heat exchange vertical plates and the heat exchange transverse plates extend along a second direction, the heat exchange transverse plates positioned at one end of each heat exchange vertical plate along the height direction are in heat conduction connection with the bottoms of the battery units, the heat exchange transverse plates positioned at the other end of each heat exchange vertical plate along the height direction are in heat conduction connection with the tops of the battery units, the heat exchange vertical plates are in heat conduction connection with one side of the battery units along the first direction, the first direction and the second direction are intersected, and a plane where the first direction and the second direction are located together is intersected with the height direction of the battery units.

Inventors

• MA JUN
• LI CANCAN
• LIU JIANGMING

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260508

Application Date

20260409

Claims (17)

1. 1. A battery device, characterized by comprising: the battery cell assembly comprises a plurality of battery cells, and the battery cell assembly has a height direction; The heat management component comprises a plurality of heat exchange pieces arranged along a first direction, the battery cells are arranged between two adjacent heat exchange pieces, each heat exchange piece comprises a heat exchange vertical plate and a heat exchange transverse plate and a current collector, the heat exchange vertical plates are respectively connected with the heat exchange transverse plates along the height direction of the battery cell assembly, the heat exchange vertical plates and the heat exchange transverse plates extend along a second direction, the heat exchange transverse plates at one end of the heat exchange vertical plates along the height direction are in heat conduction connection with the bottoms of the battery cells, the heat exchange transverse plates at the other end of the heat exchange vertical plates along the height direction are in heat conduction connection with the tops of the battery cells, the heat exchange vertical plates and one side of the battery cells along the first direction are in heat conduction connection, 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 battery cells; The heat exchange transverse plate positioned at the top of the battery unit is connected with the heat exchange vertical plate through the current collector, and the current collector is configured to introduce heat exchange medium into at least one of the heat exchange transverse plate and the heat exchange vertical plate.
2. 2. The battery device according to claim 1, further comprising a box body having an accommodating space, wherein the battery cell assembly and the thermal management component are disposed in the accommodating space, the box body comprises limiting beams, the limiting beams are disposed on two sides of the battery cell assembly along the second direction, and the limiting beams located on two sides of the battery cell assembly along the second direction are connected with two ends of the heat exchange member in a one-to-one correspondence.
3. 3. The battery device according to claim 2, wherein two ends of at least one of the heat exchange cross plates located at both sides of the battery cell are connected to the stopper beams located at both sides of the battery cell assembly in the second direction in a one-to-one correspondence manner in the height direction.
4. 4. The battery device of claim 2, wherein the battery cell includes two first sides disposed opposite in the second direction and two second sides disposed opposite in the first direction, the first sides having an area greater than an area of the second sides, the second sides being in thermally conductive connection with the heat exchange member.
5. 5. The battery device according to claim 1, wherein the heat exchange vertical plate has a first heat exchange flow passage inside, the heat exchange horizontal plate has a second heat exchange flow passage inside, and the second heat exchange flow passage of at least one of the heat exchange horizontal plates located at both ends of the heat exchange vertical plate in the height direction is in communication with the first heat exchange flow passage.
6. 6. The battery device according to claim 5, wherein the heat exchange member further comprises a current collector, the current collector is disposed between the heat exchange cross plate and the heat exchange vertical plate, which are in heat conduction connection with the top of the battery cell, the heat exchange cross plate located at the top of the battery cell is connected with the heat exchange vertical plate through the current collector, the current collector is provided with a current collecting channel, and the second heat exchange flow channel of the heat exchange cross plate located at the top of the battery cell is communicated with the first heat exchange flow channel through the current collecting channel.
7. 7. The battery device of claim 6, wherein the manifold includes a first manifold and a second manifold spaced apart along the first direction, the first heat exchange flow path includes a first chamber and a second chamber spaced apart along the second direction, and the second heat exchange flow path of the heat exchange cross plate at the top of the battery cell communicates with the first chamber through the first manifold and with the second chamber through the second manifold.
8. 8. The battery device of claim 5, wherein the second heat exchange flow channel of the heat exchange cross plate at the bottom of the battery cell is in communication with the first heat exchange flow channel.
9. 9. The battery device of claim 8, wherein the first heat exchange flow channel comprises a first chamber and a second chamber disposed at intervals along the second direction, the first chamber and the second chamber respectively communicating with the second heat exchange flow channel of the heat exchange cross plate at the bottom of the battery cell.
10. 10. The battery device according to claim 7 or 9, wherein a side of the heat exchange cross plate facing the heat exchange vertical plate is provided with a diversion groove and a converging groove, the diversion groove and the converging groove are arranged at intervals along the second direction, in the same heat exchange cross plate, the diversion groove is respectively communicated with the second heat exchange flow passage and the first chamber, and the converging groove is respectively communicated with the second heat exchange flow passage and the second chamber.
11. 11. The battery device according to claim 10, wherein in the same heat exchange cross plate, a receiving chamber and first and second support ribs extending in the second direction are provided in the heat exchange cross plate, the first and second support ribs are provided in the receiving chamber, a part of the shunt grooves and a part of the confluence grooves are formed in the first support rib, the second support rib is provided on at least one side of the first support rib in the first direction, and the first support rib, the second support rib and an inner wall of the receiving chamber define the second heat exchange flow passage together.
12. 12. The battery device according to claim 11, wherein two heat exchange members farthest in the first direction are defined as first heat exchange members, and the heat exchange member between two heat exchange members farthest in the first direction is defined as second heat exchange members; In the first heat exchange member, the second support rib is arranged at one side of the first support rib along the first direction, the second support rib is positioned at one side of the heat exchange vertical plate facing the battery cell, the second support rib positioned at one side of the first support rib along the first direction, the first support rib and part of the inner wall of the accommodating cavity jointly define the second heat exchange flow channel, And/or in the second heat exchange piece, the second heat exchange flow channel comprises a first branch flow channel and a second branch flow channel, the second support ribs are arranged on two sides of the first support rib along the first direction, the first branch flow channel is defined by the second support ribs and the first support ribs on one side of the first support rib along the first direction and part of the inner walls of the accommodating cavity, the second branch flow channel is defined by the second support ribs and the first support ribs on the other side of the first support rib along the first direction and the other part of the inner walls of the accommodating cavity, and the diversion grooves are respectively communicated with the first branch flow channel and the second branch flow channel.
13. 13. The battery device according to claim 11, wherein the heat exchange member further comprises a first blocking member, the two ends of the heat exchange cross plate along the second direction are respectively provided with the first blocking member, one of the first blocking members blocks one end of the accommodating cavity, the other of the first blocking members blocks the other end of the accommodating cavity, a third supporting rib is arranged in the heat exchange cross plate, at least one side of the first supporting rib along the first direction is provided with the third supporting rib, the third supporting rib is located on one side of the second supporting rib and is connected with or abutted against one end of the second supporting rib, and the third supporting rib and the first blocking member located on the same side of the second supporting rib are arranged at intervals along the second direction and separate the second heat exchange flow passage into bent flow passages.
14. 14. The battery device of claim 7, wherein the current collector further comprises a first plug and a second plug, the first plug and the second plug are disposed at two ends of the first current collector along the second direction in a one-to-one correspondence manner, the first plug plugs the second current collector, the first plug is provided with a first port communicated with the first current collector, the second plug plugs the first current collector, and the second plug is provided with a second port communicated with the second current collector.
15. 15. The battery device according to any one of claims 1 to 9, wherein the battery cells include electrode terminals, the heat exchange cross plate is provided between two closest electrode terminals of two adjacent battery cells in the first direction, and two adjacent battery cells in the first direction are both in heat conduction connection with the same heat exchange cross plate.
16. 16. The battery device according to any one of claims 1 to 9, wherein two heat exchange members that are farthest in the first direction are defined as first heat exchange members, and the heat exchange member between two heat exchange members that are farthest in the first direction is defined as second heat exchange members; In the first heat exchange piece, the heat exchange vertical plate deviates from one side of the battery monomer and the heat exchange transverse plate deviates from one end of the battery monomer in parallel and level, and/or in the second heat exchange piece, along the first direction, both sides of the heat exchange vertical plate are arranged at intervals with both ends of the heat exchange transverse plate.
17. 17. A powered device comprising a battery device as recited in any of claims 1-16, wherein the battery device is configured to provide 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 The ambient temperature has a great influence on the battery, and particularly for lithium ion batteries, too high a temperature and too low a temperature easily cause degradation of battery performance and cause degradation of battery life. The problem that exists at present is that the battery is affected by the ambient temperature or when it is charged quickly, the temperature is too high or too low. Disclosure of Invention In view of the above problems, the application provides a battery device and electric equipment, and three-side heat exchange of a battery unit is realized through the arrangement of a heat exchange vertical plate and a heat exchange transverse plate, so that the temperature adjustment capability of a heat exchange piece on the battery unit is improved, and the influence of the environment temperature and the overhigh temperature during quick charge is reduced. In a first aspect, the present application provides a battery device comprising: the battery cell assembly comprises a plurality of battery cells, and the battery cell assembly has a height direction; The heat management component comprises a plurality of heat exchange pieces arranged along a first direction, a battery monomer is arranged between every two adjacent heat exchange pieces, each heat exchange piece comprises a heat exchange vertical plate and a heat exchange transverse plate, the two ends of each heat exchange vertical plate are respectively connected with the heat exchange transverse plates along the height direction of each battery monomer component, each heat exchange vertical plate and each heat exchange transverse plate extend along a second direction, each heat exchange transverse plate positioned at one end of each heat exchange vertical plate along the height direction is in heat conduction connection with the bottom of each battery monomer, each heat exchange transverse plate positioned at the other end of each heat exchange vertical plate along the height direction is in heat conduction connection with the top of each battery monomer, each heat exchange vertical plate is in heat conduction connection with one side of each battery monomer along the first direction, each first direction is intersected with each second direction, and a plane where each first direction and each second direction are located is intersected with the height direction of each battery monomer; A current collector is arranged between the heat exchange transverse plate and the heat exchange vertical plate, which are in heat conduction connection with the top of the battery unit, the heat exchange transverse plate positioned at the top of the battery unit is connected with the heat exchange vertical plate through the current collector, and the current collector is configured to introduce heat exchange medium into at least one of the heat exchange transverse plate and the heat exchange vertical plate. Through the integrated configuration of heat exchange riser and heat transfer diaphragm, realize the trilateral heat conduction contact to battery monomer top, bottom and lateral part, increased heat exchange piece and battery monomer's heat transfer area, be favorable to promoting heat exchange efficiency, and then improve thermal management part and to battery monomer's temperature regulation ability to reduce ambient temperature and charge temperature under the environment soon and to battery monomer's influence, make battery monomer can work in suitable temperature range. In addition, heat exchange is carried out on three sides of the battery monomer by the heat exchange vertical plate and the heat exchange transverse plate, so that the consistency of the temperature of the battery monomer is improved, the performance attenuation caused by local temperature unevenness is reduced, and the service life of the battery is prolonged. In addition, the current collector is arranged between the heat exchange transverse plate and the heat exchange vertical plate, and compared with the current collector arranged at two ends of the heat exchange vertical plate along the second direction, the heat exchange medium can flow into the heat exchange transverse plate from top to bottom and/or from bottom to top from the current collector, so that the flow path of the heat exchange medium is shortened, and the supply and circulation efficiency of the heat exchange medium are improved. In some embodiments, the battery device further comprises a box body with an accommodating space, the battery unit component and the thermal management component are arranged in the accommodating space, the box body comprises limiting beams, the limiting beams are respectively arranged on two sides of the battery unit component along the second direction, and the limiting beams located on two