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CN-121076418-B - Battery device and electric equipment

CN121076418BCN 121076418 BCN121076418 BCN 121076418BCN-121076418-B

Abstract

The application relates to the technical field of batteries, and provides a battery device and electric equipment, wherein a signal acquisition part is electrically connected with an FPC body and comprises a first transmission end arranged on a first battery monomer, a second transmission end arranged on a second battery monomer and a weakening connection part for disconnecting the first transmission end from the second transmission end, wherein the first battery monomer and the second battery monomer are oppositely arranged in a first direction, the first transmission end and the second transmission end are opposite in the first direction, and the weakening connection part is suitable for expanding the first battery monomer and the second battery monomer, and is broken when displacement generated in the first direction exceeds a displacement threshold value, so that the first transmission end and the second transmission end are disconnected. Therefore, the expansion early warning can be realized, the safety of the battery device can be improved, the potential safety hazard is reduced, the early warning is performed in advance, the fracture of the FPC main body can be avoided, only the signal acquisition part needs to be replaced, and the maintenance cost can be reduced.

Inventors

  • WANG PENG
  • CHEN CHEN
  • CHEN QISHENG
  • WANG XIANG
  • CHEN JUNTAO
  • LI LISHENG

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20251106

Claims (8)

  1. 1. A battery device, characterized by comprising: The battery cell assembly comprises at least one battery cell array, wherein the battery cell array comprises at least two battery cells which are sequentially arranged along a first direction; The FPC assembly comprises an FPC body (10) and a signal acquisition part (20), wherein the signal acquisition part (20) is electrically connected with the FPC body (10), the signal acquisition part (20) comprises a first transmission end (224) arranged on a first battery unit (301), a second transmission end (225) arranged on a second battery unit (302) and a weakening connection part (215) for disconnecting the first transmission end (224) from the second transmission end (225), and a signal transmission loop or a signal acquisition loop is formed inside the signal acquisition part (20); Wherein the first battery cell (301) and the second battery cell (302) are arranged opposite to each other in a first direction, the first transmission end (224) and the second transmission end (225) are opposite to each other in the first direction, the weakened connection portion (215) is adapted to expand when the first battery cell (301) and the second battery cell (302) are expanded and break when a displacement generated in the first direction exceeds a displacement threshold, and disconnect the first transmission end (224) from the second transmission end (225), one of the two adjacent battery cells in the first direction is defined as the first battery cell (301) and the other as the second battery cell (302), the signal acquisition portion (20) comprises a substrate (21) and a wire (22) arranged on the substrate (21), the wire (22) is electrically connected with the FPC body (10), the substrate (21) defines the connection portion (215), the wire (22) is arranged on the substrate (301) and is in a stack, one of the two adjacent battery cells in the first connection portion (3031) and the second connection portion (303) is defined as the weakened connection portion (303), the other is defined as the weakened connection portion (303) and the weakened connection portion (303) comprises the weakened connection portion (303), the first connection end (3031) is electrically connected with the first battery cell (301), the second connection end (3032) is electrically connected with the second battery cell (302), the first transmission end (224) is located at the first connection end (3031), the second transmission end (225) is located at the second connection end (3032), the connection part (3033) is located between the first connection end (3031) and the second connection end (3032), and the weakened connection part (215) is stacked at the connection part (3033).
  2. 2. The battery device according to claim 1, wherein the substrate (21) comprises a first plate section (211) covering the first battery cell (301), a second plate section (212) covering the second battery cell (302), and a connecting plate section (213), wherein the connecting plate section (213) is located between the first plate section (211) and the second plate section (212), and a hollowed-out portion (214) is arranged on the connecting plate section (213) to define the weakened connection (215).
  3. 3. The battery device according to claim 2, wherein the lead (22) includes a first lead segment (221), a second lead segment (222), and a connection segment (223), one end of the first lead segment (221) is electrically connected to the FPC body (10), the other end extends to the first plate segment (211) and is formed as the first transmission end (224), one end of the second lead segment (222) is electrically connected to the FPC body (10), the other end extends to the second plate segment (212) and is formed as the second transmission end (225), the connection segment (223) is stacked on the weakened connection portion (215), and one end is connected to the first transmission end (224), and the other end is connected to the second transmission end (225).
  4. 4. A battery device according to any one of claims 1-3, wherein the width of the weakened connection (215) is equal to or greater than the wire diameter of the wire (22).
  5. 5. The battery device according to claim 1, wherein the connection portion (3033) comprises a conventional connection section (30331) and a weakened connection section (30332), the weakened connection portion (215) overlapping the weakened connection section (30332) and being adapted to break when the weakened connection section (30332) breaks.
  6. 6. The battery device according to claim 5, wherein the connection portion (3033) includes a plurality of arc-shaped connection segments, and at least one of the arc-shaped connection segments is provided with a score to form the weakened connection segment (30332), and the weakened connection portion (215) is disposed at one side of the score.
  7. 7. The battery device of claim 5, wherein the first connection end (3031) and the second connection end (3032) define a busbar surface, the connection portion (3033) including a plurality of arcuate connection segments, at least one of the arcuate connection segments having a smaller arcing curvature relative to the busbar surface than the other arcuate connection segments, and the arcuate connection segments having a smaller arcing curvature than the other arcuate connection segments being formed as the weakened connection segment (30332).
  8. 8. A powered device comprising a battery assembly as claimed in any one of claims 1-7.

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 related art, the FPC (English name: flexible Printed Circuit, chinese name: flexible printed circuit board) component is used for signal transmission, data acquisition and power distribution, although the flexibility of the FPC component can disperse the stress generated by volume change of the battery monomer in the charge and discharge process, and can prevent the stress from concentrating in a certain area, so that the pressure on the battery monomer and other components in the battery can be reduced, but the FPC component can not pre-warn the expansion of the battery monomer, and can only be broken and disabled integrally when the expansion force is overlarge. Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present application is to provide a battery device and an electric device, wherein the FPC assembly can realize the expansion early warning of the battery device, so as to improve the safety and reliability of the battery device and reduce the potential safety hazard. The application provides a battery device, which comprises a battery unit component and an FPC (flexible printed circuit) component, wherein the FPC component comprises an FPC body and a signal acquisition part, the signal acquisition part is electrically connected with the FPC body, the signal acquisition part comprises a first transmission end arranged on a first battery unit, a second transmission end arranged on a second battery unit and a weakening connection part used for disconnecting the first transmission end from the second transmission end, the first battery unit and the second battery unit are oppositely arranged in a first direction, the first transmission end and the second transmission end are opposite in the first direction, the weakening connection part is suitable for being broken when the first battery unit and the second battery unit expand and enable the first transmission end and the second transmission end to be disconnected when displacement generated in the first direction exceeds a displacement threshold, and one of the two battery units adjacent in the first direction is defined as the first battery unit, and the other battery unit is defined as the second battery unit. According to the battery device provided by the embodiment of the application, the weakening connection part is arranged in the signal acquisition part, and the signal transmission loop can be disconnected through the weakening connection part so as to send out the early warning that the expansion force exceeds the safety threshold, so that the expansion early warning can be realized, the safety of the battery device can be improved, the potential safety hazard is reduced, the functions of the FPC assembly can be enriched, the potential safety hazard of the battery device is reduced, the early warning is advanced, the FPC main body is prevented from being broken, only the signal acquisition part is required to be replaced during subsequent maintenance, and the maintenance cost can be reduced. According to some embodiments of the present application, the signal acquisition portion includes a substrate and a wire disposed on the substrate, the wire being electrically connected to the FPC body, the substrate defining a weakened connection portion, the wire overlying the weakened connection portion and being adapted to break in synchronization with the weakened connection portion. In the above technical scheme, on the premise of realizing expansion early warning, the weakened connection part is formed on the substrate, instead of arranging the weakened connection part on the lead, the reliability and stability of a signal transmission loop or a signal acquisition loop where the lead is located can be ensured, so that the reliability and stability of the FPC assembly are improved. According to some embodiments of the application, the substrate comprises a first plate section covered on a first battery cell, a second plate section covered on a second battery cell and a connecting plate section, wherein the connecting plate section is positioned between the first plate section and the second plate section, and a hollowed-out part is arranged on the connecting plate section to define a weakened connection part. In the technical scheme, the hollowed-out part is arranged on the connecting plate section, the weakened connection part is further formed, the weakened connection part can be formed through a simple structure, the substrate structure can be simplified, the material cost is reduced, and meanwhile, the reliability of the weakened connection part, which is broken preferentially, can be improved. According to some embodiments of the present application, t