Battery module

Patent metadata

Field	Value
Publication number	US-12412947-B2
Application number	US-202217702968-A
Country	US
Kind code	B2
Filing date	Mar 24, 2022
Priority date	Mar 25, 2021
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

Embodiments of this application provide a battery module, to improve consistency of cooling effects of battery cells, so that a battery cell group has a better states of health (SOH). The battery module includes: a heat dissipation mechanical part, which includes a first heat dissipation region and a second heat dissipation region. When an average distance between a heat dissipation pipe in the first heat dissipation region and a cooling medium outflow region is longer than an average distance between a heat dissipation pipe in the second heat dissipation region and the cooling medium outflow region, density of heat dissipation pipes in the first heat dissipation region is greater than density of heat dissipation pipes in the second heat dissipation region.

First claim

What is claimed is:

1. A battery module, comprising a heat dissipation mechanical part, wherein
the heat dissipation mechanical part is located between a first battery cell layer and a second battery cell layer, two surfaces of the heat dissipation mechanical part are respectively bonded to the first battery cell layer and the second battery cell layer, and the first battery cell layer and the second battery cell layer are two adjacent battery cell layers in a battery cell group;
the heat dissipation mechanical part comprises a first heat dissipation region and a second heat dissipation region;
the first heat dissipation region comprises M heat dissipation pipes, and an average distance between the M heat dissipation pipes and a cooling medium outflow region located on a housing is a first distance, wherein M is a positive integer greater than or equal to 1;
the second heat dissipation region comprises N heat dissipation pipes, and an average distance between the N heat dissipation pipes and the cooling medium outflow region located on the housing is a second distance, wherein N is a positive integer greater than or equal to 1; and
the first distance is greater than the second distance, and a ratio of M to an area of the first heat dissipation region is greater than a ratio of N to an area of the second heat dissipation region,
wherein a density of heat dissipation pipes in the first heat dissipation region is greater than a density of heat dissipation pipes in the second heat dissipation region.

2. The battery module according to claim 1 , wherein
the M heat dissipation pipes comprise W primary heat dissipation pipes and T secondary heat dissipation pipes, wherein a sum of W and T is M, W is a positive integer greater than or equal to 1, and T is a positive integer greater than or equal to 1; and
the W primary heat dissipation pipes are connected to a primary cooling medium input region, the T secondary heat dissipation pipes are connected to a secondary cooling medium input region, and the primary cooling medium input region and the secondary cooling medium input region are located in different areas on the housing.

3. The battery module according to claim 2 , wherein
the W primary heat dissipation pipes are parallel to each other, the T secondary heat dissipation pipes are parallel to each other, and the W primary heat dissipation pipes and the T secondary heat dissipation pipes are located on a same plane.

4. The battery module according to claim 2 , wherein
the T secondary heat dissipation pipes and the W primary heat dissipation pipes are perpendicular to each other.

5. The battery module according to claim 1 , comprising a battery cell group fastener located between the housing and a third battery cell layer, wherein the third battery cell layer is an uppermost battery cell layer or a lowermost battery cell layer in the battery cell group, and the battery cell group fastener is attached to a surface of the third battery cell layer.

6. The battery module according to claim 5 , wherein the M heat dissipation pipes comprise W primary heat dissipation pipes and T secondary heat dissipation pipes, a sum of W and T is M, W is a positive integer greater than or equal to 1, and T is a positive integer greater than or equal to 1; and
wherein the battery cell group fastener comprises two primary fastening strips, C pairs of holes are disposed on the two primary fastening strips, a connection line of each pair of the C pairs of holes is parallel to the W primary heat dissipation pipes, and C is a positive integer greater than or equal to 1.

7. The battery module according to claim 6 , further comprising an insulated cover plate, wherein
the insulated cover plate is located 1) between the housing and a positive-electrode surface of the battery cell group or 2) between the housing and a negative-electrode surface of the battery cell group, and the insulated cover plate comprises an intermediate region and two end regions, wherein the intermediate region comprises D holes, the two end regions comprise E holes, and a ratio of an area of the D holes to an area of the intermediate region is greater than a ratio of an area of the E holes to an area of the two end regions.

8. The battery module according to claim 7 , wherein the heat dissipation mechanical part is a plastic member.

9. The battery module according to claim 8 , wherein the battery cell group fastener is a sheet metal.

10. The battery module according to claim 5 , further comprising an insulated cover plate located between the housing of the battery module and a negative-electrode surface of the battery cell group.

11. A battery module, comprising
a first battery cell layer and a second battery cell layer;
a heat dissipation mechanical part, located between the first battery cell layer and the second battery cell layer, two surfaces of the heat dissipation mechanical part are respectively bonded to the first battery cell layer and the second battery cell layer, and the first battery cell layer and the second battery cell layer are two adjacent battery cell layers in a battery cell group;
the heat dissipation mechanical part comprising a first heat dissipation region and a second heat dissipation region;
the first heat dissipation region comprising M heat dissipation pipes, and an average distance between the M heat dissipation pipes and a cooling medium outflow region located on a housing is a first distance, wherein M is a positive integer greater than or equal to 1;
the second heat dissipation region comprising N heat dissipation pipes, and an average distance between the N heat dissipation pipes and the cooling medium outflow region located on the housing is a second distance, wherein N is a positive integer greater than or equal to 1; and
the first distance is greater than the second distance, and a ratio of M to an area of the first heat dissipation region is greater than a ratio of N to an area of the second heat dissipation region,
wherein a density of heat dissipation pipes in the first heat dissipation region is greater than a density of heat dissipation pipes in the second heat dissipation region.

12. The battery module according to claim 11 , wherein
the M heat dissipation pipes comprise W primary heat dissipation pipes and T secondary heat dissipation pipes, wherein a sum of W and T is M, W is a positive integer greater than or equal to 1, and T is a positive integer greater than or equal to 1; and
the W primary heat dissipation pipes are connected to a primary cooling medium input region, the T secondary heat dissipation pipes are connected to a secondary cooling medium input region, and the primary cooling medium input region and the secondary cooling medium input region are located in different areas on the housing.

13. The battery module according to claim 12 , wherein
the W primary heat dissipation pipes are parallel to each other, the T secondary heat dissipation pipes are parallel to each other, and the W primary heat dissipation pipes and the T secondary heat dissipation pipes are located on a same plane.

14. The battery module according to claim 12 , wherein
the T secondary heat dissipation pipes and the W primary heat dissipation pipes are perpendicular to each other.

15. The battery module according to claim 11 , further comprising a battery cell group fastener located between the housing and a third battery cell layer, wherein the third battery cell layer is an uppermost battery cell layer or a lowermost battery cell layer in the battery cell group, and the battery cell group fastener is attached to a surface of the

Assignees

• Huawei Digital Power Tech Co Ltd

Inventors

• Meng Hao
• Zhou Kui
• Ma Ruisheng

Classifications

• H01M10/617

  for achieving uniformity or desired distribution of temperature · CPC title

• H01M10/6561

  Gases · CPC title

• H01M10/6557

  arranged between the cells · CPC title

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M10/613 Primary

  Cooling or keeping cold · CPC title