CN-224217559-U - Battery pack and electricity utilization device

Abstract

The application discloses a battery pack and an electric device, wherein the battery pack is provided with a first direction and comprises a box body, a plurality of battery monomers and a plurality of heat insulation pieces, the box body is provided with an accommodating cavity, the battery monomers are arranged along the first direction and comprise a first terminal and a second terminal which are arranged in a deviating way along the first direction, two adjacent battery monomers comprise a first battery and a second battery, the first terminal of the first battery is connected with the second terminal of the second battery, the heat insulation pieces are arranged between the two adjacent battery monomers, the heat insulation pieces are provided with avoiding spaces penetrating along the first direction, and at least part of the connected first terminal and at least part of the second terminal penetrate into the avoiding spaces. The terminals of the two adjacent battery monomers are butted and connected in a conductive mode, the weight of the battery pack is reduced, the heat insulation piece is arranged between the two adjacent battery monomers, the heat insulation piece is provided with the avoidance space to avoid the terminals, the assembly of the heat insulation piece and the battery monomers is facilitated, and the heat transmission can be prevented.

Inventors

• CHEN YUQI
• LIU JIANLONG

Assignees

• 欣旺达动力科技股份有限公司

Dates

Publication Date

20260508

Application Date

20250409

Claims (10)

1. 1. A battery pack having a first orientation, comprising: the box body is provided with a containing cavity; The battery comprises a plurality of battery cells, a plurality of battery modules and a plurality of battery modules, wherein the battery cells are arranged along the first direction and comprise a first terminal and a second terminal which are arranged away from each other along the first direction; The heat insulation device comprises a plurality of heat insulation pieces, wherein one heat insulation piece is arranged between two adjacent battery monomers, the heat insulation pieces are provided with avoidance spaces, the avoidance spaces penetrate through the heat insulation pieces along the first direction, and at least part of the first terminals and at least part of the second terminals which are connected penetrate through the avoidance spaces.
2. 2. The battery pack of claim 1, wherein a portion of the second terminal is circumferentially disposed outside of the first terminal, and wherein an inner diameter of the relief space is greater than or equal to an outer diameter of the second terminal.
3. 3. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells, The battery cell includes: a first side surface, the first terminal being disposed on the first side surface; A second side surface opposite to the first side surface along the first direction, wherein the second terminal is arranged on the second side surface; The heat shield includes: a third side surface attached to the first side surface of the first battery; and the fourth side surface is opposite to the third side surface along the first direction and is attached to the second side surface of the second battery.
4. 4. The battery pack of claim 3, wherein the battery pack comprises a plurality of battery cells, The battery cell is provided with a first groove, and the first groove penetrates through a first side surface and a second side surface of the battery cell along the first direction; The heat insulating member has a second groove penetrating the third side surface and the fourth side surface in the first direction; In the first direction, an orthographic projection of the third side surface on the first battery is positioned on the first side surface, and an orthographic projection of the fourth side surface on the second battery is positioned on the second side surface.
5. 5. The battery pack of claim 3, wherein the third side is glued to the first side and the fourth side is glued to the second side.
6. 6. The battery pack according to claim 3, wherein the first side has an area S 1 mm 2 , the second side has an area S 2 mm 2 , the third side has an area S 3 mm 2 , and the fourth side has an area S 4 mm 2 , such that 70% to 100% of S 3 /S 1 ≤100％,70％≤S 4 /S 2 is satisfied.
7. 7. The battery pack of claim 6, wherein the third side is the same shape as the first side and the fourth side is the same shape as the second side.
8. 8. The battery pack of claim 1, wherein the thermal insulator is any one of aerogel board, nano board, ceramic fiber board.
9. 9. The battery pack of claim 1, wherein the heat insulating member is an elastic member, and the heat insulating member is sandwiched between adjacent two of the battery cells.
10. 10. An electrical device comprising a battery pack according to any one of claims 1-9.

Description

Battery pack and electricity utilization device Technical Field The application belongs to the technical field of batteries, and particularly relates to a battery pack and an electric device. Background The battery pack is used as an important energy storage component, and a plurality of battery cells are stacked in series-parallel connection, so that the battery pack has expected capacity. However, because the battery pack may have a higher temperature rise of the individual battery cells during the charge and discharge process, the heat of the battery cells with the excessively high temperature rise is transferred to the adjacent battery cells, which results in a thermal runaway risk of the battery pack and a reduced safety of the battery pack. Disclosure of utility model The embodiment of the utility model provides a battery pack, which aims to solve the problem that the battery pack is at risk of thermal runaway due to the fact that the temperature of an existing single battery monomer is excessively high and is transmitted to adjacent battery monomers. The battery pack provided by the embodiment of the application has a first direction and comprises: the box body is provided with a containing cavity; The battery comprises a plurality of battery cells, a plurality of battery modules and a plurality of battery modules, wherein the battery cells are arranged along the first direction and comprise a first terminal and a second terminal which are arranged away from each other along the first direction; The heat insulation device comprises a plurality of heat insulation pieces, wherein one heat insulation piece is arranged between two adjacent battery monomers, the heat insulation pieces are provided with avoidance spaces, the avoidance spaces penetrate through the heat insulation pieces along the first direction, and at least part of the first terminals and at least part of the second terminals which are connected penetrate through the avoidance spaces. In some embodiments, a portion of the second terminal is disposed circumferentially outside of the first terminal, and an inner diameter of the relief space is greater than or equal to an outer diameter of the second terminal. In some embodiments of the present invention, in some embodiments, The battery cell includes: a first side surface, the first terminal being disposed on the first side surface; A second side surface opposite to the first side surface along the first direction, wherein the second terminal is arranged on the second side surface; The heat shield includes: a third side surface attached to the first side surface of the first battery; and the fourth side surface is opposite to the third side surface along the first direction and is attached to the second side surface of the second battery. In some embodiments of the present invention, in some embodiments, The battery cell is provided with a first groove, and the first groove penetrates through a first side surface and a second side surface of the battery cell along the first direction; The heat insulating member has a second groove penetrating the third side surface and the fourth side surface in the first direction; In the first direction, an orthographic projection of the third side surface on the first battery is positioned on the first side surface, and an orthographic projection of the fourth side surface on the second battery is positioned on the second side surface. In some embodiments, the third side is glued to the first side and the fourth side is glued to the second side. In some embodiments, the area of the first side is S 1 mm2, the area of the second side is S 2 mm2, the area of the third side is S 3 mm2, and the area of the fourth side is S 4 mm2, satisfying 70% S 3/S1≤100％,70％≤S4/S2% 100%. In some embodiments, the third side is the same shape as the first side and the fourth side is the same shape as the second side. In some embodiments, the thermal insulation is any one of aerogel sheets, nano sheets, ceramic fiber sheets. In some embodiments, the thermal insulation member is an elastic member, and the thermal insulation member is sandwiched between two adjacent battery cells. Accordingly, an electrical device according to an embodiment of the present application includes a battery pack according to any one of the foregoing embodiments. Compared with the prior art, the battery pack has the beneficial effects that the battery pack comprises a first direction, a plurality of battery units and a plurality of heat insulation pieces, wherein the box is provided with an accommodating cavity, the battery units are arranged along the first direction and comprise a first terminal and a second terminal which are arranged in a deviating manner along the first direction, two adjacent battery units comprise a first battery and a second battery, the first terminal of the first battery is connected with the second terminal of the second battery, one heat insulation piece is arranged betwee