Battery box and battery pack

By eliminating the side beams of the battery box and adopting a hollow structure and frame design, combined with a cold plate top plate, the problems of insufficient space utilization and strength of the battery box were solved, achieving higher space utilization and structural stability, while improving the heat dissipation efficiency of the battery pack.

CN224520068UActive Publication Date: 2026-07-17CALB GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CALB GROUP CO LTD
Filing Date
2025-08-01
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing battery enclosures, while ensuring space utilization, lack sufficient strength, resulting in reduced protection for the battery pack.

Method used

Design a battery box that eliminates the traditional side beams and adopts a hollow structure for the box body. The frame structure is formed by crossbeams and a top plate. The top plate and crossbeams provide support to enhance overall stability. The top plate is designed as a cold plate to improve heat dissipation efficiency.

Benefits of technology

Without increasing the volume and weight of the battery pack, it improves space utilization and structural strength, ensures the stability and safety of the battery pack under different operating conditions, and enhances the heat dissipation performance of the battery.

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    Figure CN224520068U_ABST
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Abstract

The application discloses a battery box and a battery pack, comprising a box body and a box cover installed on the box body; the box body comprises a bottom plate, a beam assembly comprising at least a first beam and a second beam, the first beam and the second beam being arranged on the bottom plate and spaced apart along a first direction, a battery compartment for placing batteries being formed between the first beam and the second beam, both sides of the box body being in a hollow state along a second direction, the first direction being perpendicular to the second direction and parallel to the upper surface of the bottom plate, and a top plate being fixed at one end of the top of the first beam and at the other end of the top of the second beam. The both sides of the box body are designed in a hollow state, the space utilization is increased, and more batteries or other equipment can be accommodated. Meanwhile, the top plate is fixed at the top of the first beam and the second beam, the strength loss caused by the cancellation of the side beam is compensated to a certain extent, and the stability of the overall structure of the battery box is maintained.
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Claims

1. A battery housing, characterized in that, Includes a box body and a box cover (100) installed on the box body; The housing body includes: Base plate (200); The crossbeam assembly (400) includes at least a first crossbeam (410) and a second crossbeam (420). The first crossbeam (410) and the second crossbeam (420) are spaced apart on the base plate (200) along a first direction. A battery compartment for placing a battery (700) is formed between the first crossbeam (410) and the second crossbeam (420). The two sides of the housing body are hollowed out along a second direction. The first direction is perpendicular to the second direction and parallel to the upper surface of the base plate (200). The top plate (300) is fixed at one end to the top of the first crossbeam (410) and at the other end to the top of the second crossbeam (420).

2. The battery case according to claim 1, wherein Both the bottom plate (200) and the top plate (300) are cold-rolled steel plates.

3. The battery pack of claim 2, wherein, The top plates (300) are a plurality of plates arranged at intervals along the second direction, and each of the top plates (300) is connected by a liquid collection pipe (600).

4. The battery pack of claim 2, wherein, The top plate (300) is fixed to the top of the crossbeam assembly (400) by fasteners (500); The fastener (500) is locked to the beam assembly (400) or through the beam assembly (400) and locked to the base plate (200).

5. The battery pack of claim 4, wherein, When the fastener (500) is locked to the base plate (200), the base plate (200) has a threaded sleeve embedded in the solid rib for separating the flow channel, and the fastener (500) is threadedly engaged with the threaded sleeve.

6. The battery pack of claim 1, wherein, The beam assembly (400) further includes at least one intermediate beam (430), each of the intermediate beams (430) being spaced apart between the first beam (410) and the second beam (420), and the top plate (300) is also fixed to the intermediate beam (430); Each of the intermediate crossbeams (430) divides the battery compartment into multiple sub-battery compartments.

7. The battery pack of claim 6, wherein, The first crossbeam (410), the second crossbeam (420) and the intermediate crossbeam (430) are all provided with a top support (401). The top support (401) is arranged in a one-to-one correspondence with the top plate (300), and the top plate (300) is fixed to the top support (401) corresponding to it.

8. The battery pack of claim 6, wherein, The first crossbeam (410), the second crossbeam (420) and the intermediate crossbeam (430) are all provided with bottom connecting columns (402), and the bottom plate (200) is provided with bottom plate connecting holes (201) that cooperate with the bottom connecting columns (402). The bottom connecting post (402) is inserted into the bottom plate connecting hole (201) and welded to the bottom plate connecting hole (201).

9. The battery pack of claim 8, wherein, The bottom edges of the first crossbeam (410), the second crossbeam (420) and the intermediate crossbeam (430) are welded to the base plate (200).

10. The battery pack of claim 6, wherein, The first crossbeam (410), the second crossbeam (420) and the intermediate crossbeam (430) are all profile structures.

11. The battery pack of claim 6, wherein, In the first crossbeam (410), the second crossbeam (420) and each of the intermediate crossbeams (430), the distance between any two adjacent ones is equal.

12. The battery pack of any one of claims 1-11, wherein, It also includes an end beam (800) disposed on the base plate (200), the end beam (800) being arranged on the side of the second crossbeam (420) away from the first crossbeam (410), and an electrical compartment being formed between the end beam (800) and the second crossbeam (420).

13. The battery pack of claim 12, wherein, The box cover (100) is a U-shaped cover. One end of the box cover (100) is fixed to the first crossbeam (410), and the other end is fixed to the end beam (800). The bottom edge of the box cover (100) is fixed to the base plate (200), and the lower edge of the box cover (100) is fixed to the base plate (200).

14. The battery pack of claim 13, wherein, The base plate (200) has base plate flanges (203) on both sides along the second direction, and the bottom edge of the box cover (100) covers the outside of the base plate flanges (203).

15. The battery pack of any one of claims 1-11, wherein, The sum of the projected areas of each of the top plates (300) on the upper surface of the bottom plate (200) is S1, and the area of ​​the upper surface of the bottom plate (200) is S2, with S1 / S2 being (1:13.7) to (1:1.1).

16. A battery pack, characterized by It includes a battery housing and a battery (700) disposed within the battery housing, wherein the battery housing is the battery housing as described in any one of claims 1-15.