Battery pack, manufacturing method therefor, and electric device
An embodiment of the application provides a battery pack, a manufacturing method therefor, and an electric device. The battery pack includes a battery unit and a support. The battery unit includes two or more secondary batteries, and has an intermediate portion and two ends. The two ends are located on both sides of the intermediate portion in a direction in which the secondary batteries are arranged. The support is configured to support the battery unit, and includes a body and a heat-resistant component arranged thereon. The heat-resistant component is arranged corresponding to at least one of the ends, so that the heat exchange amount of the end passing through the support is less than the heat exchange amount of the intermediate portion passing through the support. The temperature difference between the end and the intermediate portion of the battery unit is reduced, and the working efficiency is improved.
1 . A battery pack, comprising:
a battery unit, comprising two or more secondary batteries, and having an intermediate portion and two ends, the two ends being respectively located at two sides of the intermediate portion in an arrangement direction in which the secondary batteries are arranged; and
a support to support the battery unit, the support comprising a body and at least one heat-resistant component arranged thereon, the at least one heat-resistant component extending at least partially across one secondary battery among the two or more secondary batteries in a width direction perpendicular to the arrangement direction on at least one end of the two ends, so that a heat exchange amount between the at least one end of the two ends and the support is less than the heat exchange amount between the intermediate portion and the support, wherein
the at least one heat-resistant component does not contact the intermediate portion of the battery unit.
2 . The battery pack according to claim 1 , wherein:
the at least one heat-resistant component comprises a recessed portion extending in a depth direction away from the at least one end of the two ends, and
a distance between the recessed portion and the at least one end of the two ends is larger than a support distance between the support and the intermediate portion in the depth direction.
3 . The battery pack according to claim 2 , wherein:
the at least one heat-resistant component further comprises a thermal barrier which is arranged in the recessed portion and has smaller thermal conductivity compared with the body.
4 . The battery pack according to claim 3 , wherein:
the at least one heat-resistant component further comprises a heat insulator which is at least partially arranged in the recessed portion and has smaller thermal conductivity compared with the thermal barrier.
5 . The battery pack according to claim 4 , wherein;
the heat insulator is located at one side of the thermal barrier,
the heat insulator being away from the at least one end of the two ends of the battery unit, and
the thermal barrier is located between the at least one end of the two ends of the battery unit and the heat insulator.
6 . The battery pack according to claim 5 , wherein:
a surface, facing the at least one end of the two ends of the battery unit, of the heat insulator is flush with an opening of the recessed portion.
7 . The battery pack according to claim 6 , wherein:
a quantity of the recessed portion is one, and a depth of the recessed portion extends in the depth direction perpendicular to the arrangement and the width directions and gradually decreases in a direction from the at least one end of the two ends to the intermediate portion; or
the quantity of the recessed portion is two or more, and the depth of the recessed portion extends in the depth direction and decreases sequentially in the direction from the at least one end of the two ends to the intermediate portion.
8 . The battery pack according to claim 7 , wherein:
three or more battery units form a group of battery units, the three or more battery units are arranged side by side in the width direction intersecting with the arrangement direction,
the at least one heat-resistant component does not contact the intermediate portion of at least one battery unit among the three or more battery units of the group of battery units, and
additional heat-resistant components are arranged on each secondary battery of at least one battery unit among two battery units located at an outermost side among the three or more battery units.
9 . The battery pack according to claim 1 , wherein:
the body comprises a heat exchange component to cool or heat the battery unit, and partially located at one side, away from the battery unit, of the at least one heat-resistant component; or
a front projection of the at least one heat-resistant component on the battery unit does not overlap with a front projection of the heat exchange component on the battery unit, and one part of the heat exchange component and the at least one heat-resistant component are arranged with respect to the at least one end of the two ends.
10 . The battery pack according to claim 8 , wherein:
the battery pack further comprises a first end plate, a second end plate and an outer frame, the at least one battery unit is arranged between the first end plate and the second end plate, the outer frame, inside which the at least one battery unit is located, is connected to the support and the first end plate, and the at least one heat-resistant component is arranged at the at least one end of the two ends adjacent to the first end plate.
11 . The battery pack according to claim 10 , wherein:
the at least one heat-resistant component is arranged with respect to the secondary battery adjacent to the first end plate in all the secondary batteries located at the at least one end of the two ends.
12 . The battery pack according to claim 11 , wherein:
the support further comprises a heat conducting component, and the support exchanges heat with the secondary battery through the heat conducting component located in an area other than the at least one heat-resistant component.
13 . The battery pack according to claim 12 , wherein:
a surface, facing the at least one end of the two ends of the at least one battery unit, of the body of the support is a plane, a thickness of the at least one heat-resistant component is equal to a thickness of the heat conducting component, and a thermal conductivity of the at least one heat-resistant component is less than a thermal conductivity of the heat conducting component.
14 . The battery pack according to claim 13 , wherein:
the support comprises a first plate body and a second plate body, the second plate body is located at one side, away from the at least one battery unit, of the first plate body, and the first plate body and the second plate body are connected to form a fluid channel.
15 . An electric device, comprising:
the battery pack according to claim 14 .
16 . A method for manufacturing a battery pack, comprising:
providing a battery unit, comprising two or more secondary batteries, the battery unit having an intermediate portion and two ends, the secondary batteries being arranged in an arrangement direction between the two ends; and
providing a support to support the battery unit, the support having at least one heat-resistant component, the at least one heat-resistant component extending at least partially across one secondary battery among the two or more secondary batteries in a width direction perpendicular to the arrangement direction on at least one end of the two ends, so that a heat exchange amount of the at least one end of the two ends passing through the support is less than the heat exchange amount of the intermediate portion passing through the support, wherein
the at least one heat-resistant component does not contact the intermediate portion of the battery unit.
17 . The battery pack according to claim 1 , wherein:
the at least one heat-resistant component comprising two heat-resistant components, the at least one heat-resistant component among the two heat-resistant components being positioned at the at least one end of the two ends and another heat-resistant component among the two heat-resistant components being positioned at the other end of the two ends.
18 . A battery pack, comprising:
a battery unit, comprising two or more secondary batteries, and having an intermediate portion and two ends, the two ends being respectively located at two sides of the intermediate portion in an arrangement direction in which the secondary batteries are arranged; and
a support to support the battery unit, the support comprising a body and at least one heat-resistant component arranged thereon, the at least one heat-resistant component extending at least partially across one secondary battery among the two or more secondary batteries in a width direction perpendicular to the arrangement direction on at least one end of the two ends, so that a heat exchange amount between the at least one end of the two ends and the support is less than the heat exchange amount between the intermediate portion and the support, wherein:
the at least one heat-resistant component does not contact the intermediate portion of the battery unit, and
the body comprises a heat exchange component arranged between a first end plate and a second end plate in a depth direction perpendicular to the arrangement and the width directions to cool or heat the battery unit, the heat exchange component partially located at one side of the at least one heat-resistant component and away from the battery unit, or
a front projection of the at least one heat-resistant component arranged between the first end plate and the second end plate in the depth direction on the battery unit does not overlap with a front projection of the heat exchange component on the battery unit, and one part of the heat exchange component and the at least one heat-resistant component are arranged with respect to the at least one end of the two ends.
19 . The battery pack according to claim 18 , wherein:
the heat exchange component arranged between the first end plate and the second plate in the depth direction having a fluid channel through which a fluid medium passes.
20 . The battery pack according to claim 1 , wherein:
the body of the support supports the intermediate portion of the battery unit by extending in the width direction such that the intermediate portion contacts the body of the support in a depth direction,
the at least one heat-resistant component contacts the at least one end of the two ends in the depth direction, and
the at least one heat-resistant component does not contact the intermediate portion in the depth direction.