US-20260128448-A1 - BATTERY PACK

US20260128448A1US 20260128448 A1US20260128448 A1US 20260128448A1US-20260128448-A1

Abstract

A battery pack includes a battery and a heat-absorbing member. The heat-absorbing member includes a heat-absorbing agent and a container housing the heat-absorbing agent. The heat-absorbing member is disposed at a position adjacent to the battery. The container includes a stacked body including a resin layer and a metal layer in this order from a side closer to the heat-absorbing agent. The stacked body has a hole extending through the resin layer and the metal layer. A region around the hole is sealed by the resin layer around the hole.

Inventors

Yuta NIKAIDO

Assignees

MURATA MANUFACTURING CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251230
Priority Date: 20230814

Claims (14)

1 . A battery pack comprising: a battery; and a heat-absorbing member including a heat-absorbing agent and a container housing the heat-absorbing agent, wherein the heat-absorbing member is disposed at a position adjacent to the battery, the container includes a first stacked body including a first resin layer and a first metal layer in this order from a side closer to the heat-absorbing agent, the first stacked body has a first hole extending through the first resin layer and the first metal layer, and a region around the first hole is sealed by the first resin layer around the first hole.
2 . The battery pack according to claim 1 , wherein the battery comprises a cylindrical battery, a plurality of the batteries is arranged side by side, the container has a columnar shape extending in a longitudinal direction of each of the batteries, the first stacked body includes a first stacked part extending along a peripheral surface of a first battery, and a second stacked part disposed at a position adjacent to the first stacked part, and extending along a peripheral surface of a second battery that is adjacent to the first battery, the first stacked body has the first hole at a boundary between the first stacked part and the second stacked part, and the region around the first hole is sealed by adhesion between the first resin layer of the first stacked part and the first resin layer of the second stacked part.
3 . The battery pack according to claim 2 , wherein the first stacked body further includes a third stacked part that is disposed at a position adjacent to both the first stacked part and the second stacked part and constitutes a part of an end part of the container, and the first hole is provided, at the boundary, at a position spaced from the third stacked part.
4 . The battery pack according to claim 3 , wherein the first hole is provided in a middle region in a longitudinal direction of the container.
5 . The battery pack according to claim 2 , wherein the first stacked body has a shape that is bent at an acute angle at the boundary, and the first hole is disposed close to the peripheral surfaces of both the first battery and the second battery.
6 . The battery pack according to claim 2 , wherein the container includes a second stacked body including a second resin layer and a second metal layer in this order from the side closer to the heat-absorbing agent, the second stacked body has a second hole extending through the second resin layer and the second metal layer, and a region around the second hole is sealed by the second resin layer around the second hole.
7 . The battery pack according to claim 6 , wherein the second stacked body includes a fourth stacked part extending along a peripheral surface of a third battery, and a fifth stacked part disposed at a position adjacent to the fourth stacked part, and extending along a peripheral surface of a fourth battery that is adjacent to the third battery, the second stacked body has the second hole at a boundary between the fourth stacked part and the fifth stacked part, and the region around the second hole is sealed by adhesion between the second resin layer of the fourth stacked part and the second resin layer of the fifth stacked part.
8 . The battery pack according to claim 7 , wherein the second stacked body has a shape that is bent at an acute angle at the boundary between the fourth stacked part and the fifth stacked part, and the second hole is disposed adjacent to the peripheral surfaces of both the third battery and the fourth battery.
9 . The battery pack according to claim 2 , wherein the first stacked body includes a third resin layer covering the first metal layer on an outside of the first metal layer, and the first hole extends also through the third resin layer.
10 . The battery pack according to claim 6 , wherein the second stacked body includes a fourth resin layer covering the second metal layer on an outside of the second metal layer, and the second hole extends also through the fourth resin layer.
11 . A battery pack comprising: a first battery; and a heat-absorbing member including a heat-absorbing agent and a container housing the heat-absorbing agent, wherein the first battery and the container each have a flat plate shape, the container has a first surface disposed at a position adjacent to the first battery, a second surface opposed to the first surface with the heat-absorbing agent interposed therebetween, and a first through hole extending through the first surface and the second surface, and a region around the first through hole is sealed by a part, of the first surface, around the first through hole and a part, of the second surface, around the first through hole.
12 . The battery pack according to claim 11 , wherein the container includes a first stacked body having the first surface, and a second stacked body having the second surface, the first stacked body includes a first resin layer and a first metal layer in this order from a side closer to the heat-absorbing agent, the second stacked body includes a second resin layer and a second metal layer in this order from the side closer to the heat-absorbing agent, the first through hole extends through both the first stacked body and the second stacked body, and the region around the first through hole is sealed by a part, of the first resin layer, around the first through hole and a part, of the second resin layer, around the first through hole.
13 . The battery pack according to claim 11 , further comprising a second battery having a flat plate shape, wherein the second surface is disposed at a position adjacent to the second battery, the container further has a second through hole extending through the first surface and the second surface, a region around the second through hole is sealed by a part, of the first surface, around the second through hole and a part, of the second surface, around the second through hole, a part where the region around the first through hole is sealed by the part, of the first surface, around the first through hole and the part, of the second resin layer, around the first through hole is provided at a location closer to the first battery than to the second battery, and a part where the region around the second through hole is sealed by the part, of the first resin layer, around the second through hole and the part, of the second resin layer, around the second through hole is provided at a location closer to the second battery than to the first battery.
14 . The battery pack according to claim 13 , wherein the container includes a first stacked body having the first surface, and a second stacked body having the second surface, the first stacked body includes a first resin layer and a first metal layer in this order from a side closer to the heat-absorbing agent, the second stacked body includes a second resin layer and a second metal layer in this order from the side closer to the heat-absorbing agent, the first through hole extends through both the first stacked body and the second stacked body, the second through hole extends through both the first stacked body and the second stacked body, a part where the region around the first through hole is sealed by a part, of the first resin layer, around the first through hole and a part, of the second resin layer, around the first through hole is provided at a location closer to the first battery than to the second battery, and a part where the region around the second through hole is sealed by a part, of the first resin layer, around the second through hole and a part, of the second resin layer, around the second through hole is provided at a location closer to the second battery than to the first battery.

Description

CROSS REFERENCE TO RELATED APPLICATIONS The present application is a continuation of International Application No. PCT/JP2024/018768, filed on May 22, 2024, which claims priority to Japanese Patent Application No. 2023-132006, filed on Aug. 14, 2023, the entire contents of which are incorporated herein by reference. BACKGROUND The present technology relates to a battery pack. Electronic equipment have been widely used, which has promoted development of a battery as a power source to be applied to the electronic equipment. In this case, in order to handle multiple batteries easily and safely, a battery pack including the multiple batteries has been proposed. A technique related to a configuration of the battery pack has been considered in various ways. For example, a heat-absorbing member is disclosed that is brought into contact with a battery in a battery unit, and the battery that has generated abnormal heat is cooled by the heat-absorbing member. SUMMARY The present technology relates to a battery pack. Regarding a battery pack, there is a concern that it can be difficult to sufficiently cool a battery that has generated abnormal heat by a heat-absorbing member, depending on an arrangement or a structure of the heat-absorbing member. It is desirable to provide a battery pack that makes it possible to sufficiently cool a battery that has generated abnormal heat by a heat-absorbing member. A battery pack according to an embodiment of the present technology includes a battery and a heat-absorbing member. The heat-absorbing member includes a heat-absorbing agent and a container housing the heat-absorbing agent. The heat-absorbing member is disposed at a position adjacent to the battery. The container includes a stacked body including a resin layer and a metal layer in this order from a side closer to the heat-absorbing agent. The stacked body has a hole extending through the resin layer and the metal layer. A region around the hole is sealed by the resin layer around the hole. A battery pack according to an embodiment of the present technology includes a battery and a heat-absorbing member. The heat-absorbing member includes a heat-absorbing agent and a container housing the heat-absorbing agent. The battery and the container each have a flat plate shape. The container has a first surface, a second surface, and a through hole. The first surface is disposed at a position adjacent to the battery. The second surface is opposed to the first surface with the heat-absorbing agent interposed therebetween. The through hole extends through the first surface and the second surface. A region around the through hole is sealed by a part, of the first surface, around the through hole and a part, of the second surface, around the through hole. According to the battery pack of an embodiment of the present technology, the container housing the heat-absorbing agent includes the stacked body including the resin layer and the metal layer, and the region around the hole extending through the stacked body is sealed by the resin layer around the hole. As a result, a welded part of the resin layer is peeled off by heat of the battery that has generated abnormal heat, allowing the heat-absorbing agent released from the hole to come into contact with and cool the battery that has generated abnormal heat. Providing the welded part of the resin layer at a desired location of the container thus makes it possible to effectively cool the battery that has generated abnormal heat. Accordingly, it is possible to sufficiently cool the battery that has generated abnormal heat by the heat-absorbing member. According to the battery pack of an embodiment of the present technology, the region around the through hole extending through the first surface and the second surface of the container housing the heat-absorbing agent is sealed by the part, of the first surface, around the through hole and the part, of the second surface, around the through hole. As a result, a welded part of the container is peeled off by heat of the battery that has generated abnormal heat, allowing the heat-absorbing agent released from the container to come into contact with and cool the battery that has generated abnormal heat. Providing the welded part at a desired location of the container thus makes it possible to effectively cool the battery that has generated abnormal heat. Accordingly, it is possible to sufficiently cool the battery that has generated abnormal heat by the heat-absorbing member. Note that effects of the present technology are not necessarily limited to those described herein and may include any of a series of effects including described below in relation to the present technology. BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a diagram illustrating a perspective configuration example of a battery pack according to an embodiment of the present technology. FIG. 2 is a diagram illustrating a perspective configuration example of a battery module to be hous