CN-122000577-A - Battery pack, energy storage device and electric equipment

Abstract

The embodiment of the application relates to the field of energy storage, and provides a battery pack, an energy storage device and electric equipment, wherein the battery pack comprises a box cover, a box cover and a storage box, wherein the box cover comprises a plurality of side plates and a cover plate; the cover plate covers one opening of the accommodating space, the cover plate comprises a first plate body and a second plate body which are arranged at intervals along the direction parallel to the side plates, a first honeycomb structure is clamped between the first plate body and the second plate body and comprises a plurality of honeycomb units adjacent along the direction parallel to the cover plate, and the box body and the box cover are buckled and connected to the box body. The battery pack provided by the embodiment of the application at least can improve the structural safety of the battery pack.

Inventors

• CHEN YUANHANG
• SHI YANYAN
• ZHANG LUHUA

Assignees

• 晶科能源股份有限公司
• 浙江晶科储能有限公司

Dates

Publication Date

20260508

Application Date

20260205

Claims (10)

1. 1. A battery pack, comprising: the box cover comprises a plurality of side plates and a cover plate, and the side plates are enclosed to form a containing space with two open ends; The cover plate covers one opening of the accommodating space, and comprises a first plate body and a second plate body which are arranged at intervals along the direction parallel to the side plate; a first honeycomb structure interposed between the first plate body and the second plate body, the first honeycomb structure including a plurality of honeycomb cells adjacent in a direction parallel to the cover plate; The box cover is buckled and connected to the box body.
2. 2. The battery pack of claim 1, further comprising a second honeycomb structure, at least one of the side plates having the second honeycomb structure.
3. 3. The battery pack according to claim 1, wherein each of the side plates has a burring structure provided with a plurality of fitting holes.
4. 4. The battery pack according to claim 1, wherein the honeycomb unit has a hexagonal or triangular cross-sectional shape in a direction perpendicular to the side plates.
5. 5. The battery pack according to claim 1, wherein the honeycomb unit includes a side wall structure parallel to the direction of the side plate, the side wall structure including a plurality of opening structures through which the plurality of honeycomb units communicate with each other.
6. 6. The battery pack of claim 1, wherein the cover is provided with at least one vent hole adjacent to the plate of the case.
7. 7. The battery pack of claim 6, wherein the vent hole is circular, and the diameter of the vent hole is 20-32mm.
8. 8. The battery pack according to claim 1, wherein the height of the sidewall structure of the honeycomb unit is 10-20mm in a direction parallel to the side plates.
9. 9. An energy storage device comprising a battery pack according to any one of claims 1 to 8 for storing electrical energy.
10. 10. A powered device comprising a battery pack as claimed in any one of claims 1 to 8, the powered device being arranged to provide electrical energy.

Description

Battery pack, energy storage device and electric equipment Technical Field The application relates to the field of energy storage, in particular to a battery pack, an energy storage device and electric equipment. Background The buffer and shock absorption capability of the existing battery pack box cover is insufficient, the load is difficult to effectively absorb under vibration or impact working conditions, and meanwhile, gas generated in the box body is easy to gather in a local area, so that the structural safety of the battery pack is low. Disclosure of Invention The embodiment of the application provides a battery pack, an energy storage device and electric equipment, which are at least beneficial to improving the structural safety of the battery pack. According to some embodiments of the present application, an aspect of the present application provides a battery pack, including a case cover, including a plurality of side plates and a cover plate, where the side plates enclose a receiving space with two open ends, the cover plate covers one of the openings of the receiving space, the cover plate includes a first plate body and a second plate body, the first plate body and the second plate body are arranged at intervals along a direction parallel to the side plates, a first honeycomb structure is sandwiched between the first plate body and the second plate body, the first honeycomb structure includes a plurality of honeycomb units adjacent along a direction parallel to the cover plate, and the case cover is buckled and connected to the case. In some embodiments, the battery pack further comprises a second honeycomb structure, at least one of the side plates having the second honeycomb structure. In some embodiments, each side plate has a flanging structure provided with a plurality of assembly holes. In some embodiments, the honeycomb unit has a hexagonal or triangular cross-sectional shape in a direction perpendicular to the side plates. In some embodiments, the honeycomb unit includes a sidewall structure parallel to the direction of the side plate, the sidewall structure includes a plurality of opening structures, and the plurality of honeycomb units are communicated with each other through the opening structures. In some embodiments, the case cover is provided with at least one vent hole near the plate of the case body. In some embodiments, the vent is circular and has a diameter of 20-32mm. In some embodiments, the height of the sidewall structures of the honeycomb unit is 10-20mm in a direction parallel to the side plates. According to some embodiments of the present application, another aspect of the embodiments of the present application provides an energy storage device, where the energy storage device includes any one of the battery packs, and the energy storage device is used for storing electric energy. According to some embodiments of the present application, a further aspect of the embodiment of the present application provides a powered device, where the powered device includes any one of the battery packs, and the powered device is configured to provide electrical energy. The technical scheme provided by the embodiment of the application has the advantages that the double-layer structure is arranged in the box cover, the first honeycomb structure is clamped between the first plate body and the second plate body, so that the box cover forms a honeycomb sandwich structure, on one hand, the buffer property of the honeycomb structure in the thickness direction is utilized, the absorption capacity of the box cover to vibration and impact load is improved, and therefore the buffer damping performance of the box cover is remarkably improved, on the other hand, the honeycomb structure is composed of a plurality of honeycomb units which are adjacent to each other, a multidirectional conduction path can be formed inside the box cover, gas generated inside the box body can be split and equalized in the honeycomb structure, the gas is prevented from gathering in a local area, and the transient pressure concentration inside the box body is reduced, so that the safety and reliability of the integral structure of the battery pack are improved. Meanwhile, the scheme can realize the diversion and pressure equalizing of gas through the honeycomb sandwich structure, and can meet the pressure release and safety requirements of the box body without arranging an explosion-proof valve on the box cover, thereby simplifying the box cover structure and improving the reliability of the system. Drawings One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, which are not to be construed as limiting the embodiments unless specifically claimed, and in order to more clearly illustrate the embodiments of the present application or the concepts of the conventional art, the drawings which are required to be used in the embodiments will be briefly descri