CN-121994375-A - Battery monomer, battery device, energy storage device and power utilization device

Abstract

The application provides a battery unit, a battery device, an energy storage device and an electric device, wherein the battery unit comprises a shell, a temperature detection assembly and at least one electrode assembly, the shell comprises a plurality of shell walls which enclose a containing cavity, the shell walls comprise first shell walls, the electrode assembly is arranged in the containing cavity, the temperature detection assembly comprises at least one temperature detection main body and an external connection end which is electrically connected with the at least one temperature detection main body, the temperature detection main body is arranged in the containing cavity, the external connection end penetrates through the first shell walls and is exposed out of one side of the first shell wall, which is opposite to the containing cavity, the temperature detection main body comprises an induction part, a flexible substrate, a transmission lead and an insulation protection structure, the induction part is electrically connected with the external connection end through the transmission lead, the induction part and the transmission lead are both connected with the flexible substrate, and the insulation protection structure is coated on the outer sides of the flexible substrate, the transmission lead and the induction part. The battery monomer, the battery device, the energy storage device and the power utilization device are beneficial to improving the heat management effect.

Inventors

• LAN FUQUAN

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260508

Application Date

20260410

Claims (18)

1. 1. A battery cell, comprising: A housing comprising a plurality of housing walls enclosing a receiving cavity, the plurality of housing walls including a first housing wall; At least one electrode assembly disposed within the receiving chamber; The temperature detection assembly comprises at least one temperature detection main body and an external connection end electrically connected with the at least one temperature detection main body, wherein the temperature detection main body is arranged in the accommodating cavity and is used for detecting the temperature in the accommodating cavity, the external connection end penetrates through the first shell wall and is exposed from one side of the first shell wall, which is opposite to the accommodating cavity, and the external connection end is used for being connected with a sampling connector; The temperature detection main body comprises an induction part, a flexible substrate, a transmission wire and an insulation protection structure, wherein the induction part is electrically connected with the external connection end through the transmission wire, the induction part and the transmission wire are both connected with the flexible substrate, and the insulation protection structure is coated on the outer side of the flexible substrate, the transmission wire and the induction part.
2. 2. The battery cell according to claim 1, wherein the external connection terminal is formed with a plug protrusion and/or a plug groove, and the external connection terminal is used for being plugged with the sampling connector through the plug protrusion and/or the plug groove.
3. 3. The battery cell of claim 1, wherein the wall thickness direction of the first housing wall is a first direction, The temperature detecting body includes a plurality of the sensing parts, at least a portion of the sensing parts of the same temperature detecting body are different from the first housing wall in the first direction, and/or at least a portion of the sensing parts of the same temperature detecting body are the same as the first housing wall in the first direction and are arranged at intervals in a direction perpendicular to the first direction.
4. 4. The battery cell of claim 1, wherein the insulating protective structure comprises a moisture isolation layer and an insulating layer, the moisture isolation layer is coated on the outer sides of the flexible substrate, the transmission wire and the sensing part, and the insulating layer is coated on the outer sides of the insulating layer.
5. 5. The battery cell of claim 1, wherein the outer terminal comprises an insulating base portion and a tab wire extending through the insulating base portion, the tab wire being electrically connected to the transmission wire, the insulating base portion being connected to the flexible substrate and the insulating protective structure.
6. 6. The battery cell according to any one of claims 1 to 5, wherein the wall thickness direction of the first case wall is a first direction, the electrode assembly is a rolled structure having a rolling axis parallel to the first direction, At least one of the temperature detecting bodies is provided at a winding center axis of the electrode assembly, and/or at least one of the temperature detecting bodies is provided at an outer circumferential side of the electrode assembly.
7. 7. The battery cell according to claim 6, wherein the electrode assembly includes a flat portion and two bent portions, the stacking direction of the flat portion is a second direction, two ends of the flat portion along a third direction are respectively connected to the two bent portions, the first direction, the second direction and the third direction are perpendicular to each other, and at least one of opposite sides of the flat portion along the second direction is provided with the temperature detecting body.
8. 8. The battery cell according to claim 7, wherein a plurality of the electrode assemblies are arranged in the second direction, and the temperature detecting body is provided between at least two adjacent electrode assemblies.
9. 9. The battery cell according to claim 7 or 8, wherein the temperature detecting body is provided with a plurality of temperature detecting bodies at intervals along the second direction, The external connection end comprises a plurality of end terminal parts, one end of each temperature detection main body along the first direction is respectively connected with the end terminal parts, and each end terminal part penetrates through the first shell wall.
10. 10. The battery cell of claim 9, further comprising a first seal disposed between the terminal head and the first housing wall.
11. 11. The battery cell of claim 9, further comprising a connecting base, wherein a plurality of mating grooves are formed on one side of the connecting base along the first direction, a plugging structure for plugging the sampling connector is formed on the other opposite side of the connecting base, the connecting base is attached to a surface of the first housing wall facing away from the accommodating cavity, and the connecting base is plugged with the plurality of terminal portions through the plurality of mating grooves.
12. 12. The battery cell of claim 6, wherein the electrode assembly is of cylindrical configuration, The temperature detection main body is provided with a plurality of temperature detection main bodies, at least a part of the temperature detection main bodies are arranged on the outer peripheral side of the electrode assembly, and the temperature detection main bodies are sequentially arranged at intervals along the circumferential direction of the electrode assembly.
13. 13. The battery cell according to claim 12, wherein the temperature detecting assembly further comprises a plurality of connection parts located at a side of the electrode assembly facing the first case wall in the first direction, one connection part is connected to each of the temperature detecting bodies provided at the outer circumferential side of the electrode assembly, and all the connection parts extend toward the winding center axis of the electrode assembly and are connected to the external terminal.
14. 14. The battery cell of claim 13, further comprising a second seal disposed between the outer terminal and the first housing wall.
15. 15. The battery cell according to any one of claims 12 to 14, further comprising a heat conductive member disposed between the temperature detecting bodies adjacent in a circumferential direction of the electrode assembly.
16. 16. A battery device comprising a plurality of the battery cells of any one of claims 1 to 15.
17. 17. An energy storage device comprising a plurality of cells as claimed in any one of claims 1 to 15 or a plurality of battery devices as claimed in claim 16 for storing or providing electrical energy.
18. 18. An electrical device comprising a plurality of cells as claimed in any one of claims 1 to 15 or a plurality of cells as claimed in claim 16 for storing or providing electrical energy.

Description

Battery monomer, battery device, energy storage device and power utilization device Technical Field The present application relates to the field of battery technologies, and in particular, to a battery unit, a battery device, an energy storage device, and an electric device. Background New energy batteries are increasingly used in life and industry, for example, new energy automobiles having a battery mounted therein have been widely used, and in addition, batteries are increasingly used in the field of energy storage and the like. In a new energy vehicle that carries a battery, the battery may be used to fully or partially power. In the energy storage field, the battery may be mounted in an energy storage battery box or directly on the user side. With the development of battery technology, how to improve the thermal management effect on batteries is one of the subjects that the industry needs to study. Disclosure of Invention The embodiment of the application provides a battery monomer, a battery device, an energy storage device and an electricity utilization device, which are beneficial to improving the heat management effect. The technical scheme of the embodiment of the application is realized as follows: The first aspect of the application provides a battery cell, which comprises a shell, at least one electrode assembly, a temperature detection assembly and an insulation protection structure, wherein the shell comprises a plurality of shell walls enclosing a containing cavity, the shell walls comprise a first shell wall, the electrode assembly is arranged in the containing cavity, the temperature detection assembly comprises at least one temperature detection main body and an external connection end head electrically connected with the at least one temperature detection main body, the temperature detection main body is arranged in the containing cavity and is used for detecting the temperature in the containing cavity, the external connection end head penetrates through the first shell wall and is exposed out of one side of the first shell wall, which is opposite to the containing cavity, the external connection end head is used for being connected with a sampling connector, the temperature detection main body comprises an induction part, a flexible substrate, a transmission wire and the insulation protection structure, the induction part is electrically connected with the external connection end head through the transmission wire, the induction part and the transmission wire are connected with the flexible substrate, and the insulation protection structure is coated on the outer sides of the flexible substrate, the transmission wire and the induction part. In the embodiment of the application, the temperature detection main body of the temperature detection assembly is arranged in the accommodating cavity, so that the temperature in the accommodating cavity can be detected, the temperature detection main body is electrically connected with the external connection end, the external connection end penetrates through the first shell wall and is exposed out of one side of the first shell wall, which is opposite to the accommodating cavity, and is used for being connected with the sampling connector, so that the temperature information detected by the temperature detection main body can be conveyed to the sampling connector through the external connection end, the temperature sampling is realized, the temperature in the battery cell can be taken in real time, the temperature of the battery cell can be obtained more accurately, and the battery cell can be subjected to corresponding thermal management in time, and the thermal management effect of the battery cell can be improved. In addition, through setting up external end at first shell wall, in the operation of using battery monomer equipment battery device, utilize battery monomer's external end to be connected with sampling connector can accomplish the sampling and connect, the simple operation does benefit to improvement packaging efficiency. The flexible substrate is adopted as a carrier of the transmission lead and the sensing part, and can be adaptively changed along with the shape of the installation space in the shell, so that the flexibility of the arrangement of the temperature detection main body is improved, and the flexible substrate is high in applicability and convenient to assemble. Through the outside cladding insulation protection architecture at flexible substrate, transmission wire and induction part, on the one hand, insulation protection architecture carries out the electrical isolation to transmission wire and induction part and other electrical components in the shell, realizes respective function, and on the other hand, insulation protection architecture separates transmission wire and induction part and the electrolyte in the shell, reduces the influence of electrolyte to the temperature detection function of temperature detectio