Cylindrical lithium battery and battery pack

Abstract

The utility model discloses a cylindrical lithium battery and a battery pack, belongs to the technical field of lithium batteries, and solves the problem that heat dissipation of the lithium battery is inconvenient, the cylindrical lithium battery comprises a lithium battery body, a heat conduction silica gel pad is attached to the outer surface of the lithium battery body, and an aluminum alloy protective shell is fixedly connected to the outer surface of the heat conduction silica gel pad; and the upper surface of the aluminum alloy protective shell is fixedly connected with a positive electrode protective pad. The positive electrode and the negative electrode of the lithium battery body can be conveniently protected through the positive electrode protection pad and the negative electrode protection pad, and then the protection plate is fixedly connected with the lower surface of the positive electrode protection pad and the upper surface of the negative electrode protection pad, so that the anti-pressure capability of the positive electrode protection pad and the negative electrode protection pad is conveniently improved; and then heat can be transferred to the outer surface of the aluminum alloy protective shell through a heat conduction silica gel pad, and then heat dissipation of the lithium battery body is facilitated through a plurality of groups of heat dissipation fins arranged on the outer surface of the aluminum alloy protective shell.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a cylindrical lithium battery and battery pack. Background Technology

[0002] With the rapid development of modern technology, lithium-ion batteries have been widely used in many fields, from portable electronic devices such as smartphones and laptops to large-scale energy application scenarios such as electric vehicles and energy storage systems. Lithium-ion batteries play a vital role. Lithium batteries are mainly composed of core, electrolyte, casing and positive and negative electrode tabs.

[0003] During the charging and discharging process, a large amount of heat is generated inside the battery core due to electrochemical reactions. Since the core is usually tightly sealed inside the battery casing and lacks a dedicated, efficient heat dissipation channel and mechanism, the heat is difficult to dissipate quickly. Excessive temperature not only accelerates the aging of the battery's internal materials and reduces the battery's capacity retention and cycle life, but may also trigger a series of serious safety issues, such as thermal runaway, leading to catastrophic consequences such as battery fire and explosion. Therefore, there is a problem with the difficulty in dissipating heat from lithium batteries. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the problems existing in the prior art, this utility model provides a cylindrical lithium battery and battery pack.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a cylindrical lithium battery, including a lithium battery body, a thermally conductive silicone pad is attached to the outer surface of the lithium battery body, and an aluminum alloy protective shell is fixedly connected to the outer surface of the thermally conductive silicone pad.

[0008] In a preferred embodiment of the cylindrical lithium battery described in this utility model, a positive electrode protective pad is fixedly connected to the upper surface of the aluminum alloy protective shell, a negative electrode protective pad is fixedly connected to the lower surface of the aluminum alloy protective shell, multiple sets of protective plates are fixedly connected to the outer surface of the aluminum alloy protective shell, the upper end of the protective plate is fixedly connected to the lower surface of the positive electrode protective pad, and the lower end of the protective plate is fixedly connected to the upper surface of the negative electrode protective pad, multiple sets of heat dissipation fins are fixedly connected to the outer surface of the aluminum alloy protective shell, the heat dissipation fins are spaced apart on the outer surface of the aluminum alloy protective shell, and the outer surface of the heat dissipation fins is in contact with the outer surface of the protective plates, and a conductive block is embedded in the outer surface of the positive electrode protective pad, and the outer surface of the conductive block is in contact with the positive electrode of the lithium battery body.

[0009] By adopting the above technical solution, the positive and negative protective pads facilitate the protection of the positive and negative electrodes of the lithium battery body. Multiple sets of protective plates are fixedly connected to the positive and negative protective pads, thereby increasing the strength between the positive and negative protective pads. Multiple sets of heat dissipation fins facilitate air circulation on the outer surface of the aluminum alloy protective shell, thereby improving the heat dissipation performance of the lithium battery body. The protective plates facilitate the protection of the outer surface of the heat dissipation fins and also facilitate the removal of the lithium battery body. The conductive block facilitates the connection of the positive electrode of the lithium battery body to the external circuit.

[0010] A battery pack includes a plurality of cylindrical lithium batteries arranged in a preset array, wherein a first positioning groove is formed on the upper surface of the positive electrode protective pad and a second positioning groove is formed on the lower surface of the negative electrode protective pad.

[0011] By adopting the above technical solution, the sand above the perforated plate can be easily sucked into the recycling frame by starting the suction fan, thus facilitating the recycling of the sand.

[0012] (III) Beneficial Effects

[0013] This invention provides a cylindrical lithium battery and battery pack. It has the following advantages:

[0014] 1. The positive and negative protective pads facilitate the protection of the positive and negative electrodes of the lithium battery body. The protective plate and the lower surface of the positive protective pad and the upper surface of the negative protective pad are fixedly connected to increase the pressure resistance of the positive and negative protective pads, thus facilitating the protection of the lithium battery body. The thermally conductive silicone pad can transfer heat to the outer surface of the aluminum alloy protective shell. The multiple sets of heat dissipation fins on the outer surface of the aluminum alloy protective shell facilitate the heat dissipation of the lithium battery body.

[0015] 2. The first and second positioning grooves facilitate the arrangement and assembly of the positive and negative electrode protective pads, thereby facilitating the positioning of the positive and negative electrode protective pads and increasing their stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a front cross-sectional view of the overall structure of this utility model.

[0019] Figure 3 yes Figure 2 A magnified structural diagram of A in the diagram.

[0020] Figure 4 This is a top view of the negative electrode protective pad in this utility model.

[0021] In the diagram, 1 is a conductive block; 2 is a positive electrode protective pad; 3 is a protective plate; 4 is a heat dissipation fin; 5 is a negative electrode protective pad; 6 is a first positioning groove; 7 is a lithium battery body; 8 is a second positioning groove; 9 is a thermally conductive silicone pad; and 10 is an aluminum alloy protective shell. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Example 1

[0024] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the first embodiment of the present invention. This embodiment provides a cylindrical lithium battery, including a lithium battery body 7. A thermally conductive silicone pad 9 is attached to the outer surface of the lithium battery body 7. An aluminum alloy protective shell 10 is fixedly connected to the outer surface of the thermally conductive silicone pad 9. A positive electrode protective pad 2 is fixedly connected to the upper surface of the aluminum alloy protective shell 10, and a negative electrode protective pad 5 is fixedly connected to the lower surface of the aluminum alloy protective shell 10.

[0025] Specifically, the outer surface of the aluminum alloy protective shell 10 is fixedly connected to multiple sets of protective plates 3. The upper end of the protective plate 3 is fixedly connected to the lower surface of the positive electrode protective pad 2, and the lower end of the protective plate 3 is fixedly connected to the upper surface of the negative electrode protective pad 5. The outer surface of the aluminum alloy protective shell 10 is fixedly connected to multiple sets of heat dissipation fins 4. The heat dissipation fins 4 are spaced apart on the outer surface of the aluminum alloy protective shell 10, and the outer surface of the heat dissipation fins 4 is in contact with the outer surface of the protective plate 3.

[0026] Furthermore, the positive electrode protective pad 2 and the negative electrode protective pad 5 are provided to protect the positive and negative electrodes of the lithium battery body 7. The protective plate 3 is fixedly connected to the lower surface of the positive electrode protective pad 2 and the upper surface of the negative electrode protective pad 5 to increase the pressure resistance of the positive electrode protective pad 2 and the negative electrode protective pad 5, thereby facilitating the protection of the lithium battery body 7. The thermally conductive silicone pad 9 can transfer heat to the outer surface of the aluminum alloy protective shell 10. The multiple sets of heat dissipation fins 4 provided on the outer surface of the aluminum alloy protective shell 10 facilitate the heat dissipation of the lithium battery body 7.

[0027] Example 2

[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the second embodiment of the present invention. This embodiment provides a battery pack, including a plurality of cylindrical lithium batteries arranged in a preset array, and a conductive block 1 is embedded in the outer surface of the positive electrode protective pad 2. The outer surface of the conductive block 1 is in contact with the positive electrode of the lithium battery body 7.

[0029] Specifically, the upper surface of the positive electrode protective pad 2 is provided with a first positioning groove 6, and the lower surface of the negative electrode protective pad 5 is provided with a second positioning groove 8.

[0030] Furthermore, the first positioning groove 6 and the second positioning groove 8 facilitate the arrangement and assembly of the positive electrode protective pad 2 and the negative electrode protective pad 5, thereby facilitating the positioning of the positive electrode protective pad 2 and the negative electrode protective pad 5 and increasing their stability.

[0031] Working principle: In use, the positive electrode protective pad 2 and the negative electrode protective pad 5 are set to protect the positive and negative electrodes of the lithium battery body 7. Then, the protective plate 3 is fixedly connected to the lower surface of the positive electrode protective pad 2 and the upper surface of the negative electrode protective pad 5, which increases the pressure resistance of the positive electrode protective pad 2 and the negative electrode protective pad 5, thus protecting the lithium battery body 7. Then, the heat is transferred to the outer surface of the aluminum alloy protective shell 10 through the thermally conductive silicone pad 9. Then, the multiple sets of heat dissipation fins 4 set on the outer surface of the aluminum alloy protective shell 10 facilitate the heat dissipation of the lithium battery body 7. The first positioning groove 6 and the second positioning groove 8 facilitate the arrangement and assembly of the positive electrode protective pad 2 and the negative electrode protective pad 5, thus limiting the position of the positive electrode protective pad 2 and the negative electrode protective pad 5 and increasing the stability of the positive electrode protective pad 2 and the negative electrode protective pad 5.

[0032] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A cylindrical lithium battery, comprising a lithium battery body (7), characterized in that: A thermally conductive silicone pad (9) is attached to the outer surface of the lithium battery body (7). An aluminum alloy protective shell (10) is fixedly connected to the outer surface of the thermally conductive silicone pad (9). A positive electrode protective pad (2) is fixedly connected to the upper surface of the aluminum alloy protective shell (10). A negative electrode protective pad (5) is fixedly connected to the lower surface of the aluminum alloy protective shell (10). Multiple sets of protective plates (3) are fixedly connected to the outer surface of the aluminum alloy protective shell (10). The upper end of the protective plate (3) is fixedly connected to the lower surface of the positive electrode protective pad (2). The lower end of the protective plate (3) is fixedly connected to the upper surface of the negative electrode protective pad (5). Multiple sets of heat dissipation fins (4) are fixedly connected to the outer surface of the aluminum alloy protective shell (10). The heat dissipation fins (4) are spaced apart on the outer surface of the aluminum alloy protective shell (10). The outer surface of the heat dissipation fins (4) is in contact with the outer surface of the protective plate (3). A conductive block (1) is embedded in the outer surface of the positive electrode protective pad (2). The outer surface of the conductive block (1) is in contact with the positive electrode of the lithium battery body (7).

2. A battery pack, characterized in that: It includes multiple cylindrical lithium batteries as described in claim 1 arranged in a preset array, and the upper surface of the positive electrode protective pad (2) is provided with a first positioning groove (6), and the lower surface of the negative electrode protective pad (5) is provided with a second positioning groove (8).

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