Flexible package lithium battery

Abstract

The utility model discloses a flexible package lithium battery which comprises a lithium battery main body, an aluminum-plastic film is wrapped on the outer end face of the lithium battery main body, an electrode led out from a roll core wrapped by the aluminum-plastic film is arranged on the end face of one side of the lithium battery main body, and a plurality of heat dissipation protrusions are fixedly arranged on the end face of the aluminum-plastic film. And the heat dissipation bulges are fixedly connected with a battery stabilizing plate for fixedly mounting the lithium battery main body. According to the device disclosed by the invention, the heat dissipation columns and the stabilizing plates are arranged on the lithium battery main bodies, so that when the plurality of lithium battery main bodies are mounted in the mounting box, heat dissipation gaps can be automatically reserved between the adjacent lithium battery main bodies through the existence of the heat dissipation columns and the stabilizing plates, and the heat dissipation effect of the lithium battery main bodies is improved; and the probability that the use effect of the lithium battery main body is influenced by high temperature caused by self-charging and self-discharging is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-package lithium batteries, in particular to soft-package lithium batteries. Background Art

[0002] Soft-pack lithium batteries are just liquid lithium-ion batteries covered with a polymer shell. The structure is packaged with aluminum-plastic film. In the event of a safety hazard, the soft-pack battery will only bulge and crack at most. Among all environmental factors, temperature has the greatest impact on the charge and discharge performance of the battery. The electrochemical reaction at the electrode / electrolyte interface is related to the ambient temperature. The output power of the lithium-ion battery will increase when the temperature rises. Temperature also affects the transmission speed of the electrolyte. The temperature rises and the transmission speed increases. The transmission slows down when the transmission temperature drops, and the battery charge and discharge performance will also be affected. However, if the temperature is too high, exceeding 45°C, it will destroy the chemical balance in the battery, leading to side reactions, and then causing the soft-pack lithium battery to bulge.

[0003] At present, in order to cope with the heat generated by lithium batteries during the charging and discharging process, the batteries are generally installed in an installation box with a heat dissipation function. However, during the installation process, multiple lithium batteries need to be connected in series to increase the total voltage and in parallel to increase the total current. The soft-package lithium battery itself only increases the heat dissipation through the aluminum-plastic film. During installation, multiple soft-package lithium batteries are arranged together, and no heat dissipation space is left for the aluminum-plastic film. As a result, even if the multiple soft-package lithium batteries are located in the heat dissipation packaging box, the heat dissipation effect is not obvious. The temperature will still rise due to their own charging and dissipation, which will cause the soft-package lithium battery to bulge, thereby affecting the service life of the soft-package lithium battery. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a soft-package lithium battery.

[0005] According to the technical solution provided in the embodiment of the present application, a soft-package lithium battery includes a lithium battery body, the outer end surface of the lithium battery body is wrapped with an aluminum-plastic film, an electrode is provided on one side end surface of the lithium battery body, and it is led out from a winding core wrapped by the aluminum-plastic film. A plurality of heat dissipation protrusions are fixedly provided on the end surface of the aluminum-plastic film, and the heat dissipation protrusions are fixedly connected to a battery stabilizing plate used for fixing and installing the lithium battery body.

[0006] Furthermore, the electrode includes a positive electrode sheet and a negative electrode sheet to achieve positive and negative electrode connection of the battery.

[0007] Furthermore, the heat dissipation protrusion and the aluminum-plastic film are both made of heat dissipation materials, which facilitates the self-heat dissipation of the lithium battery main body when the lithium battery main bodies are stacked.

[0008] Furthermore, the heat dissipation protrusion is in a cylindrical shape, thereby ensuring stability of the battery stabilizing plate during installation.

[0009] Furthermore, a plurality of the heat dissipation protrusions are staggered to increase heat dissipation.

[0010] Furthermore, the battery stabilizing plate is placed in parallel with the aluminum-plastic film connected to the heat dissipation protrusion, so that the external shape of the lithium battery body is inconvenient and easy to install.

[0011] To sum up, the beneficial effects of the present application are as follows: the device of the present application arranges heat dissipation columns and stabilizing plates on the lithium battery body, so that when multiple lithium battery bodies are installed in the installation box, the adjacent lithium battery bodies can automatically leave heat dissipation gaps through the existence of the heat dissipation columns and the stabilizing plates, thereby increasing the heat dissipation effect of the lithium battery body itself and reducing the probability of affecting the use effect of the lithium battery body due to high temperature caused by its own charging and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0013] Figure 1 It is a structural schematic diagram of the overall device of the utility model;

[0014] Figure 2 It is a schematic diagram of the exploded structure of the overall device of the utility model;

[0015] Figure 3 It is a schematic diagram of stacking multiple lithium battery bodies of the utility model.

[0016] Numbers in the figure: lithium battery body - 1; aluminum-plastic film - 2; electrode - 3; heat dissipation protrusion - 4; battery stabilizing plate - 5. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] Soft package lithium battery, such as Figure 1 and Figure 2 As shown, an aluminum-plastic film 2 is wrapped on the outer end surface of the lithium battery body 1, and an electrode 3 is provided on the right end surface of the lithium battery body 1, which is led out from the winding core wrapped by the aluminum-plastic film 2. A battery stabilizing plate 5 is fixed on the upper end surface of the lithium battery body 1 through a plurality of staggered heat dissipation protrusions 4, and the battery stabilizing plate 5 is parallel to the aluminum-plastic film 25 on the upper end surface of the lithium battery body 1;

[0020] The battery stabilizing plate 5 is in a rectangular shape, or in an inverted U-shape.

[0021] When in use, when multiple lithium battery bodies 1 are stacked, Figure 3 As shown, the heat on the upper end surface of the lithium battery body 1 located in the middle part can be transferred to the heat dissipation protrusion 4 through the aluminum-plastic film 2. Because there is sufficient heat dissipation space between the heat dissipation protrusions 4, the heat on the upper end of the lithium battery body 1 can be dissipated;

[0022] The heat at the lower end of the lithium battery body 1 in the middle portion can be transferred to the battery stabilizing plate 5 abutting against it through the aluminum-plastic film 2 located on its lower end surface, and then the heat is transferred to the heat dissipation protrusion 4 and dissipated from the gap in the heat dissipation protrusion 4 to achieve heat dissipation of the lithium battery body 1.

[0023] The above description is only an explanation of the preferred embodiments of the present application and the technical principles and other schemes used. At the same time, the scope of the invention involved in the present application is not limited to the technical scheme formed by a specific combination of the above technical features, but also should cover other technical schemes formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical scheme.

Claims

1. A soft-package lithium battery, comprising a lithium battery body (1), the outer end surface of the lithium battery body (1) being wrapped with an aluminum-plastic film (2), and an electrode (3) being led out from a winding core wrapped with the aluminum-plastic film (2) being provided on one end surface of the lithium battery body (1), characterized in that: A plurality of heat dissipation protrusions (4) are fixedly provided on the end surface of the aluminum-plastic film (2), and the heat dissipation protrusions (4) are fixedly connected to a battery stabilizing plate (5) used for fixing and installing the lithium battery body (1).

2. The soft package lithium battery according to claim 1, characterized in that: The electrode (3) comprises a positive electrode sheet and a negative electrode sheet.

3. The soft package lithium battery according to claim 1, characterized in that: The heat dissipation protrusion (4) and the aluminum-plastic film (2) are both made of heat dissipation material.

4. The soft package lithium battery according to claim 3, characterized in that: The heat dissipation protrusion (4) is in the shape of a cylinder.

5. The soft package lithium battery according to claim 4, characterized in that: A plurality of the heat dissipation protrusions (4) are placed in a staggered manner.

6. The soft package lithium battery according to claim 1, characterized in that: The battery stabilizing plate (5) is placed parallel to the aluminum-plastic film (2) connected to the heat dissipation protrusion (4).

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