Single battery and electric equipment

Abstract

The utility model belongs to the field of cooling of soft package secondary batteries, and particularly relates to a single battery and electric equipment. In order to solve the technical problem that in the prior art, a liquid cooling plate or an air cooling structure only cools the surface of a packaging film, and the heat conductivity of the packaging film is poor, so that the heat dissipation performance of a large-capacity soft package battery is poor, the utility model provides a single battery which comprises the packaging film, and the liquid cooling plate is packaged in the packaging film; the liquid cooling plate is provided with a liquid inlet part and a liquid outlet part of which one ends extend out of the packaging film, and the liquid inlet part and the liquid outlet part are hermetically connected with the packaging film. The utility model further provides electric equipment comprising the single battery. The liquid cooling plate is packaged in the packaging film, so that the battery cell can be directly cooled, and the heat dissipation performance of the single battery is improved; the cooling liquid in the packaging film is replaced through the liquid inlet part and the liquid outlet part, so that the temperature control capability of the single battery is ensured, and the heat dissipation performance is improved.

Description

Technical Field

[0001] The utility model belongs to the field of cooling of soft-pack secondary batteries, in particular to a single battery and electrical equipment. Background Art

[0002] Soft-pack batteries generate a lot of heat when working. When the temperature of the soft-pack batteries is high, it will cause thermal runaway. Therefore, the soft-pack batteries need to be cooled when they are working normally.

[0003] In a large-capacity soft-pack battery (i.e., a single cell), the soft-pack battery includes a packaging film, an electrode for connecting to an electrical device, and at least two battery cells packaged in the packaging film. The battery cells, electrodes, and packaging film are welded and connected by an ultrasonic welding process. In the prior art, when cooling a large-capacity soft-pack battery, the large surface of the soft-pack battery is usually directly in contact with a liquid cooling plate. The liquid cooling plate includes a liquid inlet portion connected to a liquid inlet pipe and a liquid outlet portion connected to a liquid outlet pipe, so that cooling liquid is injected into the liquid cooling plate through the liquid inlet portion to cool the surface of the packaging film, and the cooling liquid after heat exchange flows out from the liquid outlet portion; or, an air cooling structure is provided to blow cold air on the outer peripheral surface of the packaging film to cool the surface of the packaging film. However, due to the poor thermal conductivity of the packaging film, the heat dissipation performance of the large-capacity soft-pack battery is poor when only the surface of the packaging film is cooled. Utility Model Content

[0004] The purpose of the utility model is to provide a single battery to solve the technical problem in the prior art that the heat dissipation performance of large-capacity soft-pack batteries is poor because the liquid cooling plate or air cooling structure only cools the surface of the packaging film, and the thermal conductivity of the packaging film is poor. The purpose of the utility model is also to provide an electrical device to solve the same technical problem as above.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the single cell provided by the utility model is:

[0006] A single cell battery comprises a packaging film, a liquid cooling plate is packaged inside the packaging film, the liquid cooling plate comprises a liquid inlet and a liquid outlet extending from the packaging film at one end, the liquid inlet and the liquid outlet are sealed and connected to the packaging film; an insulating layer is provided on the outer surface of the liquid cooling plate, or the liquid cooling plate is made of a heat-conducting insulating material.

[0007] Furthermore, at least two battery cells are encapsulated in the packaging film, and the liquid cooling plate is arranged between the at least two battery cells.

[0008] Furthermore, the liquid inlet and the liquid outlet are sealed and connected to the packaging film by hot melt adhesive.

[0009] Furthermore, a hot melt adhesive layer is provided on the liquid inlet and the liquid outlet.

[0010] Furthermore, a hot melt adhesive layer is provided on one side of the packaging film corresponding to the liquid inlet portion and the liquid outlet portion.

[0011] Furthermore, the liquid inlet and the liquid outlet are located on the side of the packaging film where the electrode is not located.

[0012] Furthermore, the liquid inlet portion and / or the liquid outlet portion has a bending portion bent upward.

[0013] Furthermore, the liquid inlet and the liquid outlet are located on the same side of the packaging film.

[0014] The beneficial effects of the single cell in the utility model are as follows: the utility model is an improved invention. By encapsulating the liquid cooling plate inside the packaging film, the battery cell can be directly cooled, thereby improving the heat dissipation performance of the single cell; the liquid inlet and the liquid outlet of the liquid cooling plate extend out of the packaging film, and the liquid inlet and the liquid outlet are sealed and connected to the packaging film, and the cooling liquid in the packaging film can be replaced by the liquid inlet and the liquid outlet under the premise of ensuring the sealing of the single cell, thereby ensuring the heat dissipation performance of the single cell.

[0015] In order to achieve the above-mentioned purpose, the technical solution of the electrical equipment provided by the utility model is:

[0016] An electrical device includes a single cell, the single cell includes a packaging film, a liquid cooling plate is packaged inside the packaging film, the liquid cooling plate includes a liquid inlet and a liquid outlet extending from the packaging film at one end, the liquid inlet and the liquid outlet are sealed and connected to the packaging film; an insulating layer is provided on the outer surface of the liquid cooling plate, or the liquid cooling plate is made of a heat-conducting insulating material.

[0017] Furthermore, at least two battery cells are encapsulated in the packaging film, and the liquid cooling plate is arranged between the at least two battery cells.

[0018] Furthermore, the liquid inlet and the liquid outlet are sealed and connected to the packaging film by hot melt adhesive.

[0019] Furthermore, a hot melt adhesive layer is provided on the liquid inlet and the liquid outlet.

[0020] Furthermore, a hot melt adhesive layer is provided on one side of the packaging film corresponding to the liquid inlet portion and the liquid outlet portion.

[0021] Furthermore, the liquid inlet and the liquid outlet are located on the side of the packaging film where the electrode is not located.

[0022] Furthermore, the liquid inlet portion and / or the liquid outlet portion has a bending portion bent upward.

[0023] Furthermore, the liquid inlet and the liquid outlet are located on the same side of the packaging film.

[0024] The beneficial effects of the electrical equipment in the utility model are as follows: the utility model is an improved invention. By packaging the liquid cooling plate inside the packaging film, the battery cell can be directly cooled, thereby improving the heat dissipation performance of the single battery and the electrical equipment; the liquid inlet and the liquid outlet of the liquid cooling plate extend out of the packaging film, and the liquid inlet and the liquid outlet are sealed and connected to the packaging film, and the cooling liquid in the packaging film can be replaced by the liquid inlet and the liquid outlet under the premise of ensuring the sealing of the single battery, thereby ensuring the heat dissipation performance of the single battery and the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a first liquid cooling plate for a single cell in the utility model;

[0026] Figure 2 This is a schematic structural diagram of a second liquid cooling plate for a single cell in the utility model;

[0027] Figure 3 This is a schematic structural diagram of a third liquid cooling plate for a single cell in the utility model;

[0028] Figure 4 It is a schematic structural diagram of a fourth liquid cooling plate of a single cell in the utility model;

[0029] Figure 5 It is a structural schematic diagram of a specific implementation mode of a single cell battery in the utility model;

[0030] Figure 6 for Figure 5 Exploded diagram of the structure;

[0031] Figure 7 It is a structural schematic diagram of another specific implementation mode of a single cell in the utility model;

[0032] Figure 8 This is an enlarged structural diagram of the connection between the packaging film of the single battery and the liquid cooling plate in the utility model.

[0033] Description of reference numerals:

[0034] 1. Liquid cooling plate; 11. Liquid inlet; 12. Liquid outlet; 13. Bending part; 14. Liquid cooling tube; 2. Packaging film; 3. Positive electrode; 4. Negative electrode; 5. Battery cell; 6. Hot melt adhesive layer; 6', hot melt adhesive layer. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the embodiments.

[0036] The specific embodiment of the single battery provided by the utility model is as follows:

[0037] The purpose of this embodiment is to provide a single cell battery, by encapsulating a liquid cooling plate in a packaging film, so that the liquid cooling plate can directly cool the battery cell, thereby improving the heat dissipation performance of the single cell battery.

[0038] like Figures 1 to 8 As shown, the single battery includes a packaging film 2 and a battery cell 5. A liquid cooling plate 1 is packaged inside the packaging film 2. The liquid cooling plate 1 has a liquid inlet 11 and a liquid outlet 12 extending from the packaging film 2 at one end. The liquid inlet 11 and the liquid outlet 12 are sealed and connected to the packaging film 2.

[0039] Specifically, the liquid cooling plate 1 can be Figure 1 The flat plate structure shown in FIG. 1 is a flat plate structure, and the liquid inlet 11 and the liquid outlet 12 are located on the longer side of the liquid cooling plate 1; or the liquid cooling plate 1 can be Figure 2 The flat plate structure shown in FIG. 1 is a flat plate structure, and the liquid inlet 11 and the liquid outlet 12 are located at the shorter side of the liquid cooling plate 1; or the liquid cooling plate 1 can be Figure 3 In the structure shown in the figure, the liquid inlet portion 11 and the liquid outlet portion 12 have a bent portion 13 bent upward to facilitate the connection of the liquid inlet pipe and the liquid outlet pipe located outside the single battery, and the liquid inlet portion 11 and the liquid outlet portion 12 are located on the longer side of the liquid cooling plate 1; or the liquid cooling plate 1 can be Figure 4 In the structure shown, the liquid inlet 11 and the liquid outlet 12 have a bent portion 13 bent upward to facilitate the connection of the liquid inlet pipe and the liquid outlet pipe outside the single battery, and the liquid inlet 11 and the liquid outlet 12 are located on the shorter side of the liquid cooling plate 1; or, only the liquid inlet 11 is provided with the bent portion 13; or, only the liquid outlet 12 is provided with the bent portion 13; or, the liquid cooling plate 1 can be a liquid cooling plate in the prior art. In this embodiment, the shape and structure of the liquid cooling plate 1 are not limited.

[0040] By encapsulating the liquid cooling plate 1 into the packaging film 2, the battery cell 5 can be directly cooled, thereby improving the heat dissipation performance of the single battery; the liquid inlet 11 and the liquid outlet 12 of the liquid cooling plate 1 extend out of the packaging film 2 (that is, a part of the liquid inlet 11 and the liquid outlet 12 are arranged outside the packaging film 2), and the liquid inlet 11 and the liquid outlet 12 are sealed and connected to the packaging film 2. Under the premise of ensuring the sealing of the single battery, the cooling liquid in the packaging film 2 can be replaced through the liquid inlet 11 and the liquid outlet 12, thereby ensuring the temperature control ability of the single battery and improving the heat dissipation performance.

[0041] like Figures 5 to 7 As shown, in order to further improve the heat dissipation capacity of the single battery, as a specific implementation, at least two battery cells 5 are encapsulated in the packaging film 2, and the liquid cooling plate 1 is arranged between the at least two battery cells 5. Specifically, two battery cells 5 are encapsulated in the packaging film 2, and the liquid cooling plate 1 is arranged between the two battery cells 5. The liquid cooling plate 1 is arranged between the two battery cells 5, so that the liquid cooling plate 1 can directly cool the two adjacent battery cells 5, thereby improving the heat dissipation capacity of the single battery.

[0042] Of course, in other specific embodiments, when there are two battery cells 5, a liquid cooling plate 1 may be respectively arranged between each battery cell 5 and the packaging film 2; of course, the battery cells 5 may also be three, four or more; the liquid cooling plate 1 may be arranged between two adjacent battery cells 5, or between the battery cell 5 and the packaging film 2, or between two adjacent battery cells 5 and between two adjacent battery cells 5; the number of liquid cooling plates 1 may also be one, two or more. In this embodiment, the specific arrangement position and number of the liquid cooling plates 1 are not limited.

[0043] In order to conveniently realize the sealed connection between the liquid inlet 11 and the liquid outlet 12 and the packaging film 2, as a specific implementation method, Figure 8 As shown, the liquid inlet 11 and the liquid outlet 12 are sealed and connected with the packaging film 2 through hot melt adhesive. Specifically, a hot melt adhesive layer 6 is provided on the liquid inlet 11 and the liquid outlet 12; and a hot melt adhesive layer 6' is provided on one side of the packaging film 2 corresponding to the liquid inlet 11 and the liquid outlet 12. The hot-pressing process can conveniently realize the sealed connection between the liquid inlet 11 and the liquid outlet 12 and the packaging film 2 through the hot melt adhesive layer. The hot melt adhesive layer 6 on the liquid inlet 11 and the liquid outlet 12 and the hot melt adhesive layer 6' on the packaging film 2 can use the same hot melt adhesive, or different hot melt adhesives.

[0044] Of course, in other specific embodiments, the hot melt adhesive layer 6 may be provided only on the liquid inlet 11 and the liquid outlet 12; or, the hot melt adhesive layer 6' may be provided only at the corresponding positions of the packaging film 2 and the liquid inlet 11 and the liquid outlet 12; or, the liquid inlet 11 and the liquid outlet 12 may be sealed and connected to the packaging film 2 by means of sealant bonding or the like.

[0045] In order to facilitate the connection of the liquid inlet pipe and the liquid outlet pipe on the liquid inlet part 11 and the liquid outlet part 12, as a specific implementation method, Figure 5 As shown, the positive electrode 3 and the negative electrode 4 are located on the same side of the single cell, and the liquid inlet 11 and the liquid outlet 12 are located on the non-electrode side of the packaging film 2, that is, the side of the packaging film 2 where the positive electrode 3 and the negative electrode 4 are not provided. After the single cell is electrically connected to the electrical equipment through the positive electrode 3 and the negative electrode 4, the liquid inlet 11 and the liquid outlet 12 are located on the side of the single cell or away from the electrical equipment, so as to facilitate the connection of the liquid inlet pipe and the liquid outlet pipe.

[0046] However, in other specific embodiments, the positive electrode 3 and the negative electrode 4 may also be located on both sides of the single cell. In this case, the liquid inlet 11 may also be located on the side where the positive electrode 3 is located, and the liquid outlet 12 may also be located on the side where the negative electrode 4 is located; or, the positive electrode 3, the negative electrode 4, the liquid inlet 11, and the liquid outlet 12 are all located on different sides of the single cell. In this embodiment, the positions of the positive electrode 3, the negative electrode 4, the liquid inlet 11, and the liquid outlet 12 are not limited.

[0047] In order to improve the utilization efficiency of the cooling liquid, as a specific embodiment, a cooling tube 14 is provided in the cooling plate 1 to connect the liquid inlet 11 and the liquid outlet 12. Of course, in other specific embodiments, the cooling plate 1 can also be a hollow plate, and the hollow part of the cooling plate 1 constitutes a flow channel for the cooling liquid to flow; or, the cooling plate 1 can be any cooling plate in the prior art, and the structure of the cooling plate 1 is not limited in this embodiment. By providing the cooling tube 14, the ratio of the surface area to the volume of the cooling liquid can be increased, thereby improving the utilization efficiency of the cooling liquid.

[0048] In order to improve safety, as a specific implementation, an insulating layer is provided on the outer surface of the liquid cooling plate 1 to prevent the liquid cooling plate 1 from being charged. Of course, in other specific implementations, the liquid cooling plate 1 can also be made of a thermally conductive insulating material; or the liquid cooling plate 1 is made of a thermally conductive and electrically conductive metal material, and an insulating layer is attached to the surface of the thermally conductive and electrically conductive metal material.

[0049] Specific embodiments of the electrical equipment provided by the utility model:

[0050] The purpose of this embodiment is to provide an electrical device, by encapsulating a liquid cooling plate in the packaging film of a single battery of the electrical device, so that the liquid cooling plate can directly cool the battery cell, thereby improving the heat dissipation performance of the single battery and the electrical device.

[0051] As a specific implementation, the electrical device includes a single cell. The specific structure of the single cell is the same as the specific structure of the single cell in the specific embodiment above, and will not be described in detail here.

[0052] Finally, it should be noted that the above are only preferred embodiments of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A single cell battery, comprising a packaging film, characterized in that: A liquid cooling plate is encapsulated inside the packaging film, and the liquid cooling plate includes a liquid inlet and a liquid outlet extending from the packaging film at one end, and the liquid inlet and the liquid outlet are sealed and connected to the packaging film; an insulating layer is provided on the outer surface of the liquid cooling plate, or the liquid cooling plate is made of a heat-conducting insulating material.

2. The single cell according to claim 1, characterized in that: At least two battery cells are packaged in the packaging film, and the liquid cooling plate is arranged between the at least two battery cells.

3. The single cell according to claim 1, characterized in that: The liquid inlet and the liquid outlet are sealed and connected with the packaging film through hot melt adhesive.

4. The single cell according to claim 3, characterized in that: A hot melt adhesive layer is provided on the liquid inlet and the liquid outlet.

5. The single cell according to claim 3 or 4, characterized in that: A hot melt adhesive layer is arranged on one side of the packaging film corresponding to the liquid inlet portion and the liquid outlet portion.

6. The single cell according to any one of claims 1 to 4, characterized in that: The liquid inlet and the liquid outlet are located on the side of the packaging film where the electrodes are not located.

7. The single cell according to any one of claims 1 to 4, characterized in that: The liquid inlet portion and / or the liquid outlet portion has a bent portion bent upward.

8. The single cell according to any one of claims 1 to 4, characterized in that: The liquid inlet and the liquid outlet are located on the same side of the packaging film.

9. An electrical device, comprising a single battery, characterized in that: The single cell is the single cell according to any one of claims 1 to 8.

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