Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment. The battery pack comprises a heat exchange plate, a battery cell and a heat absorption part; in the first direction, the battery cell is positioned on the side of the heat exchange plate; the heat absorption part is located on the side, close to the battery cell, of the heat exchange plate in the first direction, the heat absorption part is located on the side of the battery cell in the second direction intersecting with the first direction, the heat absorption part is in heat conduction connection with part of the battery cell, and the heat absorption part and the end, close to the heat exchange plate, of the battery cell are spaced in the first direction. According to the battery pack disclosed by the utility model, the heat absorption part is separated from one end, close to the heat exchange plate, of the battery cell, so that the heat absorption part can absorb heat at the position with higher temperature of the battery cell no matter whether the battery cell works normally or is out of control, the temperature of the battery cell is uniform, and the service life of the battery cell is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment, in particular to a battery pack and electrical equipment. Background Art

[0002] The existing battery pack includes a battery cell and a cold plate. The battery cell is located on one side of the cold plate along the setting direction. The cold plate is used to cool the battery cell. In this way, the temperature of the part of the battery cell close to the cold plate and the part far from the cold plate are different. This will shorten the service life of the battery cell.

[0003] To this end, the utility model provides a battery pack and an electrical device to at least partially solve the above-mentioned problems. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the specific embodiments section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above technical problems, the utility model provides a battery pack, the battery pack comprising:

[0006] Heat exchange plate;

[0007] The battery cell is located on the side of the heat exchange plate along the first direction;

[0008] The heat absorbing part is located on a side of the heat exchange plate close to the battery cell along a first direction, and is located on the side of the battery cell along a second direction intersecting the first direction. The heat absorbing part is partially thermally connected to the battery cell, and is spaced apart from one end of the battery cell close to the heat exchange plate along the first direction.

[0009] According to the battery pack of the utility model, the heat absorption part is spaced apart from one end of the battery cell close to the heat exchange plate. Regardless of whether the battery cell is working normally or out of control, the heat absorption part can absorb heat from the position of the battery cell with higher temperature, thereby making the temperature of the battery cell uniform and improving the service life of the battery cell. In addition, the heat absorption part has a small volume.

[0010] Optionally, the battery pack includes a heat absorbing member, which includes a heat absorbing part and a heat insulating part, the heat insulating part is located on the side of the heat absorbing part close to the heat exchange plate, and the heat insulating part is connected to the battery cell.

[0011] Optionally, a heat exchange plate is provided on one side of the heat absorbing member along the first direction, and a width dimension of the heat absorbing member along the first direction is a.

[0012] The dimension e of the heat absorbing portion along the first direction 吸 Satisfies a3 / 4≤e吸 ≤a2 / 3.

[0013] Optionally, both sides of the heat absorbing element along the first direction are provided with heat exchange plates.

[0014] Both ends of the heat absorbing element along the first direction have heat insulating parts.

[0015] Optionally, the heat insulating portion includes a first heat insulating portion and a second heat insulating portion, and the width dimension of the heat absorbing member along the first direction is a.

[0016] The dimension e of the first heat insulating portion along the first direction 隔1 Satisfy a / 5≤e 隔1 ≤a / 3.

[0017] Optionally, the thermal insulation part is configured as an aerogel part, a glass fiber part or a ceramic fiber part.

[0018] Optionally, a projection of the battery cell on a projection plane perpendicular to the second direction covers a projection of the heat absorption element on the projection plane.

[0019] Optionally, the battery cell is a rectangular parallelepiped structure, and the thickness direction of the battery cell is parallel to the second direction.

[0020] Optionally, the heat absorbing element is a rectangular parallelepiped structure.

[0021] The width dimension a of the heat absorbing member along the first direction and the width dimension x of the battery along the first direction satisfy x-40≤a≤x; and / or

[0022] The length dimension b of the heat absorber along the third direction and the length dimension y of the battery along the third direction satisfy y-40≤b≤y, and any two of the third direction, the first direction and the second direction intersect; and / or

[0023] A thickness dimension c of the heat absorption member along the second direction satisfies 0.1 mm≤c≤10 mm.

[0024] Optionally, the heat absorption portion is configured as a hydrogel portion.

[0025] The utility model also provides an electric device, which includes the aforementioned battery pack.

[0026] According to the electrical equipment of the utility model, the electrical equipment includes the aforementioned battery pack, and the heat absorption part is spaced apart from one end of the battery cell close to the heat exchange plate. Regardless of whether the battery cell is working normally or out of control, the heat absorption part can absorb heat from the position of the battery cell with higher temperature, thereby making the temperature of the battery cell uniform and improving the service life of the battery cell; in addition, the heat absorption part has a small volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the advantages of the utility model more easily understood, the utility model briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the utility model and should not be considered as limiting the scope of protection thereof. The utility model is described and explained with additional characteristics and details through the accompanying drawings.

[0028] Figure 1 It is a three-dimensional schematic diagram of a battery cell and a cold plate connected together in a battery pack according to a first preferred embodiment of the utility model;

[0029] Figure 2 for Figure 1 A schematic front view of the relative positional relationship of the battery cells, the cold plate and the heat absorbing member of the battery pack connected together;

[0030] Figure 3 for Figure 1 A schematic side view of the relative positional relationship of the battery cells, cold plate and heat sink of the battery pack;

[0031] Figure 4 A front view schematically showing the relative positional relationship of the battery cells, the cold plate and the heat absorbing member of the battery pack according to the second preferred embodiment of the present utility model; and

[0032] Figure 5 for Figure 4 A schematic side view of the relative positional relationship of the battery cells, cold plate and heat sink of the battery pack.

[0033] Description of Reference Numerals

[0034] 110: Heat exchange plate 120: Battery cell

[0035] 130: heat absorbing element 131: heat absorbing part

[0036] 132: Insulation part 210: Heat exchange plate

[0037] 220: Battery cell 231: Heat absorption part

[0038] 233: First heat insulation part 234: Second heat insulation part DETAILED DESCRIPTION

[0039] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0040] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are only for the purpose of illustration and are not intended to be limiting.

[0041] In this document, ordinal numbers such as “first” and “second” cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order.

[0042] In order to thoroughly understand the implementation of the utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the utility model is not limited to the specific details familiar to those skilled in the art. The preferred implementation of the utility model is described in detail below, but in addition to these detailed descriptions, the utility model can also have other implementations.

[0043] First embodiment

[0044] The utility model provides a battery pack. The battery pack can be used in electrical equipment (such as vehicles). The heat absorption member 130 of the battery pack can absorb heat at a position with a higher temperature of the battery core 120, thereby making the temperature of the entire battery core 120 uniform (the temperature difference between the position of the battery core 120 close to the heat exchange plate 110 and the position far from the heat exchange plate is less than a preset value), thereby improving the service life of the battery core 120.

[0045] Please refer to Figures 1 to 3 The battery pack includes a heat exchange plate 110. The heat exchange plate 110 may be a heat exchange plate of an existing battery pack, which will not be described in detail here.

[0046] The battery pack also includes at least two battery cells 120. At least two battery cells 120 are connected in series or in parallel. In this way, along the first direction D1, the battery cell 120 is located on one side of the heat exchange plate 110. The battery cell 120 can be thermally connected to the heat exchange plate 110 (for example, the battery cell 120 contacts the heat exchange plate 110 to be able to transfer heat). In this way, the heat exchange plate 110 can adjust the temperature of the end of the battery cell 120 close to the heat exchange plate 110. For example, the heat exchange plate 110 can be a cold plate. The heat exchange plate 110 can cool the battery cell 120. In this way, when the battery pack is working, the battery cell 120 generates heat. At this time, the heat exchange plate 110 can reduce the temperature of the end of the battery cell 120 close to the heat exchange plate 110. In this way, along the first direction D1, the temperature of the part of the battery cell 120 close to the heat exchange plate 110 is different from the temperature of the part away from the heat exchange plate 110. As Figure 2 and Figure 3 As shown, the battery pack further includes a heat absorbing member 130. Along the first direction D1, the heat absorbing member 130 and the battery cell 120 are located on the same side of the heat exchange plate 110. Along the second direction D2, the heat absorbing member 130 is located on one side of the battery cell 120. The second direction D2 intersects the first direction D1. For example, the second direction D2 is perpendicular to the first direction D1.

[0047] The heat absorbing member 130 includes a heat absorbing portion 131. The heat absorbing portion 131 is made of a heat absorbing material (e.g., a phase change heat absorbing material). The heat absorbing portion 131 can absorb heat. The heat absorbing portion 131 and the battery cell 120 are partially in contact to be thermally connected. In this way, the heat absorbing portion 131 can absorb the heat of the battery cell 120. In addition, the volume of the heat absorbing portion 131 can be reduced. Specifically, on a projection plane perpendicular to the second direction D2, the projection of the heat absorbing portion 131 and the projection of the battery cell 120 partially overlap.

[0048] It should be noted that the heat absorbing element includes a packaging part, which is located outside the heat absorbing part and the heat insulating part, so as to encapsulate the heat absorbing part and the heat insulating part in a closed space.

[0049] It is understood that in an embodiment not shown, the above-mentioned heat-conducting connection can also be a heat-conducting member made of a heat-conducting material (such as a heat-conducting metal) to transfer heat. For example, a heat-conducting member is arranged between the battery cell and the heat-absorbing part. The heat-conducting member contacts the battery cell and the heat-absorbing member. A heat-conducting member can also be arranged between the battery cell and the heat exchange plate to transfer heat through the heat-conducting member.

[0050] Along the first direction D1, the heat absorbing portion 131 is spaced from the heat exchange plate 110. The heat absorbing portion 131 is spaced from one end of the battery cell 120 close to the heat exchange plate 110. In this way, the heat absorbing portion 131 can absorb heat from a position of the battery cell 120 with a higher temperature, thereby making the temperature of the battery cell 120 uniform.

[0051] In this way, when the battery cell is not out of control (working normally), the heat absorption part 131 can absorb heat from the position with higher temperature of the battery cell 120, thereby making the temperature of the battery cell 120 uniform. When the battery cell is out of control (for example, catching fire), the heat absorption part 131 can also absorb heat from the position with higher temperature of the battery cell 120, thereby making the temperature of the battery cell 120 uniform.

[0052] In this embodiment, the heat absorption portion 131 is spaced apart from one end of the battery cell 120 close to the heat exchange plate 110. Regardless of whether the battery cell 120 is working normally or out of control, the heat absorption portion 131 can absorb heat from a position with a higher temperature of the battery cell 120, thereby making the temperature of the battery cell 120 uniform and increasing the service life of the battery cell 120.

[0053] Alternatively, if Figure 2 and Figure 3As shown, the heat absorbing member 130 also includes a heat insulating portion 132. The heat insulating portion 132 is made of a heat insulating material. The heat insulating portion 132 is connected to the heat absorbing portion 131. In this way, the heat absorbing member 130 is a composite material member made of a composite material. The heat insulating portion 132 is located on the side of the heat absorbing portion 131 close to the heat exchange plate 110. The heat insulating portion 132 can contact and connect the battery cell 120. The projection of the heat insulating portion 132 on the projection plane and the projection of the battery cell 120 on the projection plane partially overlap. As a result, the heat insulating portion 132 can separate the heat transfer between the battery cell 120 and other battery cells 120, and can further make the temperature of the battery cell 120 uniform (the aforementioned preset value is smaller). In addition, the provision of the heat insulating portion 132 can improve the mechanical properties of the heat absorbing member 130 and increase the strength of the heat absorbing member 130. In this way, when the battery cell is out of control (for example, catching fire), the heat absorbing member 130 made of the composite material has a high strength and the heat absorbing member 130 is not easily damaged.

[0054] Optionally, the projection of the battery cell 120 on the projection plane covers the projection of the heat absorber 130 on the projection plane, thereby facilitating installation.

[0055] Furthermore, if Figures 1 to 3 As shown, the battery cell 120 is a rectangular parallelepiped structure. The width direction of the battery cell 120 is parallel to the first direction D1. The thickness direction of the battery cell 120 is parallel to the second direction D2. The length direction of the battery cell 120 is parallel to the third direction D3. In this way, the side with the largest area of ​​the battery cell 120 is perpendicular to the second direction D2. The heat absorption member 130 is located to the side of the side with the largest area of ​​the battery cell 120. Among them, the first direction D1 is parallel to the height direction of the battery pack. In this embodiment, a heat exchange plate 110 is provided below the battery cell 120, so that the heat absorption member 130 can cool the battery cell 120 more effectively.

[0056] That is, any two of the third direction D3, the first direction D1 and the second direction D2 intersect. For example, any two of the third direction D3, the first direction D1 and the second direction D2 are perpendicular.

[0057] The heat absorbing member 130 is a rectangular parallelepiped structure. The length direction of the heat absorbing member 130 is parallel to the length direction of the battery cell 120. The width direction of the heat absorbing member 130 is parallel to the width direction of the heat absorbing member 130. The thickness direction of the battery cell 120 is parallel to the thickness direction of the battery cell 120. Therefore, the structure of the heat absorbing member 130 is simple.

[0058] like Figures 1 to 3As shown, the width dimension of the battery cell 120 along the first direction D1 is x. The length dimension of the battery cell 120 along the third direction D3 is y. The thickness dimension of the battery cell 120 along the second direction D2 is z. The width dimension of the heat absorbing member 130 along the first direction D1 is a. The length dimension of the heat absorbing member 130 along the third direction D3 is b. The thickness dimension of the heat absorbing member 130 along the second direction D2 is c. The units of x, y, a, b and c are mm.

[0059] Among them, x-40≤a≤x. y-40≤b≤y. 0.1≤c≤10. Thus, assembly is convenient.

[0060] Further, 70mm≤x≤1500mm, 30mm≤y≤500mm, 6mm≤z≤50mm.

[0061] The heat absorbing member 130 has a heat exchange plate 110 on one side along the first direction D1. The size of the heat absorbing portion 131 along the first direction D1 is e 吸 The dimension of the heat insulating portion 132 along the first direction D1 is e 隔 .

[0062] e 吸 Satisfies a 3 / 4 ≤ e 吸 ≤a2 / 3. Thus, the battery cell 120 can be cooled more effectively, thereby making the temperature of the battery cell 120 more uniform.

[0063] e 隔 Satisfies a / 4≤e 隔 ≤a / 3. Thus, the battery cell 120 can be cooled more effectively, thereby making the temperature of the battery cell 120 more uniform.

[0064] Optionally, the heat insulating part 132 is constructed as an aerogel part made of aerogel, a glass fiber part made of glass fiber, or a ceramic fiber part made of ceramic fiber, thereby facilitating the selection of the heat insulating part 132 .

[0065] Optionally, the heat absorbing part 131 is constructed as a hydrogel part made of hydrogel, thereby facilitating the selection of the heat absorbing part 131 .

[0066] Second embodiment

[0067] Second embodiment

[0068] like Figure 4 and Figure 5 As shown, in the second embodiment, both sides of the heat absorbing member along the first direction D1 have heat exchange plates 210. Both ends of the heat absorbing member along the first direction D1 have heat insulation parts. Thus, the battery cell 220 can be cooled more effectively.

[0069] Furthermore, if Figure 4and Figure 5 As shown, the heat insulating portion includes a first heat insulating portion 233 and a second heat insulating portion 234. The dimension of the first heat insulating portion 233 along the first direction D1 is e 隔1 The size of the heat absorption portion 231 along the first direction D1 is e 吸 The dimension of the second heat insulating portion 234 along the first direction D1 is e 隔2 .

[0070] e 吸 Satisfy a / 3≤e 吸 ≤a3 / 5. Thus, the battery cell 220 can be cooled more effectively, thereby making the temperature of the battery cell 220 more uniform.

[0071] e 隔1 Satisfy a / 5≤e 隔1 ≤a / 3. Thus, the battery cell 220 can be cooled more effectively, thereby making the temperature of the battery cell 220 more uniform.

[0072] e 隔2 Satisfy a / 5≤e 隔2 ≤a / 3. Thus, the battery cell 220 can be cooled more effectively, thereby making the temperature of the battery cell 220 more uniform.

[0073] The other configurations of the second embodiment are the same as those of the first embodiment and will not be described in detail here.

[0074] The utility model also provides an electric device, which includes the above-mentioned battery pack.

[0075] In this embodiment, the electrical equipment includes the aforementioned battery pack, and the heat absorption portion 131 is spaced apart from one end of the battery cell 120 close to the heat exchange plate 110. The heat absorption portion 131 can absorb heat from a position of the battery cell 120 with a higher temperature, thereby making the temperature of the battery cell 120 uniform and increasing the service life of the battery cell 120.

[0076] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

[0077] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "component" and the like appearing herein may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing herein may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

Claims

1. A battery pack, characterized in that: The battery pack comprises: Heat exchange plate; A battery cell, wherein the battery cell is located on the side of the heat exchange plate along the first direction; The heat absorbing portion is located on a side of the heat exchange plate close to the battery cell along the first direction, and is located on the side of the battery cell along a second direction intersecting the first direction. The heat absorbing portion is thermally connected to a portion of the battery cell, and is spaced apart from an end of the battery cell close to the heat exchange plate along the first direction.

2. The battery pack according to claim 1, characterized in that: The battery pack includes a heat absorbing member, and the heat absorbing member includes the heat absorbing portion and a heat insulating portion. The heat insulating portion is located on a side of the heat absorbing portion close to the heat exchange plate, and the heat insulating portion is connected to the battery cell.

3. The battery pack according to claim 2, characterized in that: The heat absorbing member has the heat exchange plate on one side along the first direction, and the width of the heat absorbing member along the first direction is a. The dimension e of the heat absorption portion along the first direction 吸 Satisfies a3 / 4≤e 吸 ≤a2 / 3.

4. The battery pack according to claim 2, characterized in that: The heat absorbing element has the heat exchange plates on both sides along the first direction, Both ends of the heat absorbing member along the first direction have the heat insulating portion.

5. The battery pack according to claim 4, characterized in that: The heat insulating portion includes a first heat insulating portion and a second heat insulating portion, the width dimension of the heat absorbing member along the first direction is a, The dimension e of the first heat insulating portion along the first direction 隔1 Satisfy a / 5≤e 隔1 ≤a / 3.

6. The battery pack according to claim 2, characterized in that: The heat insulation part is configured as an aerogel part, a glass fiber part or a ceramic fiber part.

7. The battery pack according to claim 2, characterized in that: The projection of the battery core on a projection plane perpendicular to the second direction covers the projection of the heat absorption component on the projection plane.

8. The battery pack according to claim 7, characterized in that: The battery core is a rectangular parallelepiped structure, and a thickness direction of the battery core is parallel to the second direction.

9. The battery pack according to claim 8, characterized in that: The heat absorbing element is a rectangular parallelepiped structure. The width dimension a of the heat absorbing member along the first direction and the width dimension x of the battery along the first direction satisfy x-40≤a≤x; and / or A length dimension b of the heat absorption element along the third direction and a length dimension y of the battery along the third direction satisfy y-40≤b≤y, and any two of the third direction, the first direction and the second direction intersect; and / or A thickness dimension c of the heat absorption member along the second direction satisfies 0.1 mm≤c≤10 mm.

10. The battery pack according to claim 1, characterized in that: The heat absorbing portion is configured as a hydrogel portion.

11. An electrical device, characterized in that: The electric device comprises the battery pack according to any one of claims 1 to 10.

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