Soft package lithium battery with tab anti-bending protection

Abstract

The utility model relates to the field of lithium cell discloses a kind of soft package lithium cell of tab anti-bending protection, including soft package shell, the inside of soft package shell is provided with battery cell, the top end and bottom end of battery cell are provided with cooling plate, the cooling plate is filled with heat-conducting silica gel between battery cell, the left side of battery cell is fixedly connected with two groups of battery tab, the outside of battery tab is provided with protective cover, the left side of soft package shell is fixedly connected with mounting seat.The soft package lithium cell of tab anti-bending protection is protected by protective cover, the protective cover is installed outside battery tab during transportation and storage, the protective cover uses higher hardness material, the splicing clamping block on the protective cover is inserted into the splicing clamping slot inside mounting seat during installation, the protective cover is reinforced and tensioned by elastic rope, the protective cover can be removed from outside battery tab during use, solve the problem that tab is easily damaged.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a soft-pack lithium battery with tab protection against bending. Background Technology

[0002] Soft-pack lithium batteries are a type of lithium-ion battery that uses an aluminum-plastic composite film encapsulation shell. They belong to the category of liquid lithium-ion batteries combined with polymer shells. These batteries have a high safety profile, and in the event of a hazard, they will only bulge and crack without the risk of explosion.

[0003] Currently, when using common soft-pack lithium batteries, bending and breaking of the tabs is a common problem that requires special attention. Damaged tabs may lead to connection failure, increased resistance, or even short circuits and other safety hazards. Moreover, the aluminum-plastic film shell is less strong than the metal shell and is easily damaged when subjected to impact, squeezing or puncture by sharp objects, which may lead to short circuits and leakage inside the cell.

[0004] There is an urgent need for a soft-pack lithium battery with tab protection against bending to address the technical deficiencies mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a soft-pack lithium battery with tab protection against bending, in order to solve the problem of easily damaged tabs mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a soft-pack lithium battery with anti-bending protection for the tabs, comprising a soft-pack shell, a battery cell disposed inside the soft-pack shell, cooling plates disposed at the top and bottom of the battery cell, thermally conductive silicone filling the space between the cooling plates and the battery cell, two sets of battery tabs fixedly connected to the left side of the battery cell, a protective cover disposed outside the battery tabs, a mounting base fixedly connected to the left side of the soft-pack shell, a splicing slot disposed inside the mounting base, a splicing block fixedly connected to the right side of the protective cover, an elastic cord fixedly connected to the top of the protective cover, and a connecting buckle fixedly connected to the end of the elastic cord.

[0007] As a further technical solution of this utility model, the mounting base is provided in two sets, and the mounting base is sleeved on the outside of the battery tab.

[0008] As a further technical solution of this utility model, the splicing block is embedded inside the splicing slot, and the connecting buckle is fixedly connected to the top of the mounting base.

[0009] As a further technical solution of this utility model, an aluminum foil layer is provided on the inner side of the soft-pack shell, and a heat-sealing layer is provided on the inner side of the aluminum foil layer.

[0010] As a further technical solution of this utility model, the soft outer shell is made of nylon layer, the aluminum foil layer is the middle layer, and the heat-sealing layer is the inner layer.

[0011] As a further technical solution of this utility model, a reinforcing plate is fixedly connected to the left side inside the soft-pack outer shell, and the reinforcing plate covers the outside of the battery cell.

[0012] As a further technical solution of this utility model, the cooling plate is provided in two sets, and the thermally conductive silicone is provided on the outside of the battery cell.

[0013] As a further technical solution of this utility model, the battery cell adopts a stacked structure, and composite spacers are provided between the stacked layers of the battery cell.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the soft-pack lithium battery with anti-bending protection of the tabs not only achieves the function of avoiding damage to the tabs and enhancing the protective strength of the outer shell, but also achieves the function of enhancing heat dissipation. (1) The battery tabs on the soft-pack battery are connected by a battery cell, a protective cover, battery tabs, elastic ropes, a mounting base, splicing blocks and splicing slots. The battery tabs are easily damaged during transportation. During transportation and storage, the protective cover is installed on the outside of the battery tabs. The protective cover is made of a material with high hardness. During installation, the splicing blocks on the protective cover are inserted into the splicing slots of the mounting base. The protective cover is reinforced and tightened by elastic ropes. When in use, the protective cover can be removed from the outside of the battery tabs. This structure enhances the protection of the tabs and realizes the function of avoiding damage to the tabs. (2) By setting up a soft-pack shell, an aluminum foil layer and a heat-sealing layer, the outer layer of the soft-pack shell is made of a higher strength, more puncture-resistant and more corrosion-resistant outer nylon layer, the middle layer and the inner layer of the soft-pack shell are aluminum foil layer and heat-sealing layer respectively, the aluminum foil layer and the heat-sealing layer can further enhance the overall protective strength of the shell, prevent the soft-pack shell from being punctured and damaged, thereby improving the safety and stability of the soft-pack lithium battery; (3) By setting up a soft-pack shell, battery cell, thermally conductive silicone and cooling plate, the thermally conductive silicone on the outside of the battery cell is placed between the cell and the cooling plate. The thermally conductive silicone can effectively eliminate air gaps, reduce thermal resistance, and ensure that heat can be quickly conducted to the cooling system. The cooling plate is attached to the soft-pack shell. Taking advantage of the large surface area of ​​the soft-pack battery, the cooling plate greatly improves the heat dissipation efficiency. This structure realizes the function of enhancing heat dissipation effect. Attached Figure Description

[0015] Figure 1 This is a frontal cross-sectional view of the present invention. Figure 2 This is a front view cross-sectional structural diagram of the protective cover of this utility model; Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 4 This is a partial front view of the cooling plate of this utility model.

[0016] In the diagram: 1. Soft-pack outer shell; 2. Battery cell; 3. Thermally conductive silicone; 4. Cooling plate; 5. Aluminum foil layer; 6. Protective cover; 7. Battery tabs; 8. Elastic cord; 9. Mounting base; 10. Reinforcing plate; 11. Connecting buckle; 12. Splicing block; 13. Splicing slot; 14. Heat-sealing layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 An embodiment of this utility model provides: a soft-pack lithium battery with tab protection against bending, including a soft-pack shell 1, a battery cell 2 disposed inside the soft-pack shell 1, a cooling plate 4 disposed at the top and bottom of the battery cell 2, thermally conductive silicone 3 filled between the cooling plate 4 and the battery cell 2, two sets of battery tabs 7 fixedly connected to the left side of the battery cell 2, a protective cover 6 disposed outside the battery tabs 7, a mounting base 9 fixedly connected to the left side of the soft-pack shell 1, a splicing slot 13 disposed inside the mounting base 9, a splicing block 12 fixedly connected to the right side of the protective cover 6, an elastic rope 8 fixedly connected to the top of the protective cover 6, and a connecting buckle 11 fixedly connected to the end of the elastic rope 8; The mounting base 9 is provided in two sets. The mounting base 9 is fitted on the outside of the battery tab 7. The splicing block 12 is embedded in the inside of the splicing slot 13. The connecting buckle 11 is fixedly connected to the top of the mounting base 9. A reinforcing plate 10 is fixedly connected to the left side inside the soft-pack shell 1. The reinforcing plate 10 covers the outside of the battery cell 2. Specifically, such as Figure 1 and Figure 2 As shown, the battery tabs 7 on the soft-pack battery are used for connection. The battery tabs 7 are easily damaged during transportation. During transportation and storage, the protective cover 6 is installed on the outside of the battery tabs 7. The protective cover 6 is made of a material with high hardness. During installation, the splicing clips 12 on the protective cover 6 are inserted into the splicing slots 13 of the mounting base 9. The protective cover 6 is reinforced and tightened by the elastic rope 8. When in use, the protective cover 6 can be removed from the outside of the battery tabs 7.

[0019] The inner side of the soft-pack shell 1 is provided with an aluminum foil layer 5, and the inner side of the aluminum foil layer 5 is provided with a heat-sealing layer 14. The soft-pack shell 1 is made of nylon, the aluminum foil layer 5 is the middle layer, and the heat-sealing layer 14 is the inner layer. Specifically, such as Figure 1 and Figure 3 As shown, the outer layer of the soft-pack shell 1 is made of a higher strength, more puncture-resistant and more corrosion-resistant outer nylon layer. The middle layer and inner layer of the soft-pack shell 1 are aluminum foil layer 5 and heat-sealing layer 14, respectively. The aluminum foil layer 5 and heat-sealing layer 14 can further enhance the overall protective strength of the shell and prevent the soft-pack shell 1 from being punctured and damaged.

[0020] The cooling plate 4 is provided in two sets, the thermally conductive silicone 3 is provided on the outside of the battery cell 2, the battery cell 2 adopts a stacked structure, and composite gaskets are provided between the stacks of the battery cell 2. Specifically, such as Figure 1 and Figure 4 As shown, the thermally conductive silicone 3 on the outside of the battery cell 2 is placed between the cell and the cooling plate 4. The thermally conductive silicone 3 can effectively eliminate air gaps, reduce thermal resistance, and ensure that heat can be quickly conducted to the cooling system. The cooling plate 4 is attached to the soft-pack outer shell 1. Taking advantage of the large surface area of ​​the soft-pack battery, the cooling plate 4 greatly improves the heat dissipation efficiency.

[0021] Working principle: The battery tabs 7 on the soft-pack battery are used for connection. The battery tabs 7 are easily damaged during transportation. During transportation and storage, a protective cover 6 is installed on the outside of the battery tabs 7. The protective cover 6 is made of a high-hardness material. During installation, the splicing clips 12 on the protective cover 6 are inserted into the splicing slots 13 of the mounting base 9. The protective cover 6 is reinforced and tightened by elastic ropes 8. When in use, the protective cover 6 can be removed from the outside of the battery tabs 7. Thermally conductive silicone 3 is placed between the battery cell 2 and the cooling plate 4. The thermally conductive silicone 3 effectively eliminates air bubbles. The air gap reduces thermal resistance and ensures that heat can be quickly conducted to the cooling system. The cooling plate 4 is attached to the soft-pack outer shell 1. Taking advantage of the large surface area of ​​the soft-pack battery, the cooling plate 4 greatly improves the heat dissipation efficiency. The outer layer of the soft-pack outer shell 1 is made of a higher strength, more puncture-resistant and more corrosion-resistant outer nylon layer. The middle layer and inner layer of the soft-pack outer shell 1 are aluminum foil layer 5 and heat-sealing layer 14, respectively. The aluminum foil layer 5 and heat-sealing layer 14 can further enhance the overall protective strength of the shell and prevent the soft-pack outer shell 1 from being punctured and damaged, thereby improving the safety and stability of the soft-pack lithium battery.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A soft-pack lithium battery with tab protection against bending, comprising a soft-pack casing (1), characterized in that: The soft-pack shell (1) is equipped with a battery cell (2) inside. The top and bottom of the battery cell (2) are equipped with cooling plates (4). Thermally conductive silicone (3) is filled between the cooling plates (4) and the battery cell (2). Two sets of battery tabs (7) are fixedly connected to the left side of the battery cell (2). A protective cover (6) is provided outside the battery tabs (7). A mounting base (9) is fixedly connected to the left side of the soft-pack shell (1). A splicing slot (13) is provided inside the mounting base (9). A splicing block (12) is fixedly connected to the right side of the protective cover (6). An elastic rope (8) is fixedly connected to the top of the protective cover (6). A connecting buckle (11) is fixedly connected to the end of the elastic rope (8).

2. A soft-pack lithium battery with tab anti-bending protection according to claim 1, characterized in that: The mounting base (9) is provided in two sets, and the mounting base (9) is fitted over the outside of the battery tab (7).

3. A soft-pack lithium battery with tab anti-bending protection according to claim 1, characterized in that: The splicing block (12) is embedded inside the splicing slot (13), and the connecting buckle (11) is fixedly connected to the top of the mounting base (9).

4. A soft-pack lithium battery with tab anti-bending protection according to claim 1, characterized in that: The inner side of the soft-pack outer shell (1) is provided with an aluminum foil layer (5), and the inner side of the aluminum foil layer (5) is provided with a heat-sealing layer (14).

5. A soft-pack lithium battery with tab anti-bending protection according to claim 4, characterized in that: The soft outer shell (1) is made of nylon, the aluminum foil layer (5) is the middle layer, and the heat-sealing layer (14) is the inner layer.

6. A soft-pack lithium battery with tab anti-bending protection according to claim 1, characterized in that: A reinforcing plate (10) is fixedly connected to the left side inside the soft-pack outer shell (1), and the reinforcing plate (10) covers the outside of the battery cell (2).

7. A soft-pack lithium battery with tab anti-bending protection according to claim 1, characterized in that: The cooling plate (4) is provided in two sets, and the thermally conductive silicone (3) is provided on the outside of the battery cell (2).

8. A soft-pack lithium battery with tab anti-bending protection according to claim 1, characterized in that: The battery cell (2) adopts a stacked structure, and composite spacers are provided between the stacks of the battery cell (2).

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