Battery module and lithium ion battery

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to a battery module and a lithium ion battery. Comprising a battery cell, a PCBA and an insulating shell, one end of the battery cell is provided with a tab group, and the tab group is of a bent structure in the height direction of the battery cell; the PCBA is arranged on one side, deviating from the battery cell, of the tab group and is electrically connected with the tab group, and one side, deviating from the battery cell, of the PCBA is provided with an output port; the PCBA is arranged in the battery cell, the tab group is arranged in the battery cell, the insulating shell is arranged at one end, close to the tab group, of the battery cell, an opening is formed in the insulating shell, the PCBA and the tab group are wrapped by the insulating shell, the output port is exposed from the opening, and the output port is used for being connected with an external electronic product. According to the utility model, the energy density and the environmental adaptability of the battery module are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion battery technical field especially a battery module and lithium ion battery. BACKGROUND

[0002] Lithium ion battery is widely used in various digital products, such as mobile phone, notebook, personal care and other fields, and the reliability of part of handheld products to battery is extremely high, the positive and negative poles of the battery cell are connected with PCBA in the process of packaging, the positive and negative poles of the battery cell are in vertical state, after being connected with PCBA, the overall volume of the lithium ion battery obtained after packaging is large, which leads to low energy density and short endurance time of the lithium ion battery, and the lithium ion battery is easily damaged under high temperature and high humidity, accidental drop and other environments. SUMMARY

[0003] The technical problem to be solved by the embodiments of the utility model lies in providing a battery module and a lithium ion battery to solve the problem that the overall volume of the lithium ion battery is large in the prior art, which leads to low energy density and short endurance time of the lithium ion battery, and the lithium ion battery is easily damaged under high temperature and high humidity and other environments.

[0004] The utility model discloses a battery module, include: the battery cell, PCBA and insulating shell, the one end of battery cell is provided with the lug group, the lug group is along the height direction of battery cell and presents the bending structure, PCBA is located at the lug group side away from battery cell, and is connected with lug group electricity, the side of PCBA away from battery cell is equipped with output port, the insulating shell is located at the one end of battery cell close to lug group, the opening is formed on the insulating shell, the insulating shell is wrapped PCBA and lug group, and output port exposes from the opening, and output port is used for connecting with external electronic product.

[0005] Optionally, the lug group includes a first lug and a second lug arranged at intervals, the first lug and the second lug are both in a bending structure; the PCBA is provided with a first nickel sheet and a second nickel sheet, the first nickel sheet is electrically connected with the first lug, and the second nickel sheet is electrically connected with the second lug.

[0006] Optionally, the first nickel sheet is welded with the first lug, and the second nickel sheet is welded with the second lug.

[0007] Optionally, the PCBA is arranged in parallel with the battery cell along the height direction of the battery cell.

[0008] Optionally, the surface of the output port is in a planar structure, and the output port is made of a metal material.

[0009] Optionally, the battery module further comprises a connector connected with the output port.

[0010] Optionally, the battery module further comprises a plug line connected with the output port.

[0011] Optionally, the insulating shell is formed by injection molding of an injection molding material, and the injection molding material is filled in a gap between the PCBA and the battery cell.

[0012] Optionally, the injection molding material is any one of polypropylene, polyethylene, and polyvinyl chloride.

[0013] Optionally, the battery cell is a soft-pack battery cell.

[0014] The utility model discloses still a kind of lithium ion battery, including above-mentioned battery module.

[0015] Compared with prior art, the battery module and the lithium ion battery provided by the utility model embodiment have the beneficial effects that: the top sealing edge of one end of the tab group of the battery cell is bent along the height direction of the battery cell, so that the top sealing edge has a bent structure, the height of the top sealing edge is reduced, the occupied space of the top sealing edge is reduced, and then the PCBA is arranged on the side of the tab group away from the battery cell, the height of the battery module is reduced, the volume of the battery cell can be increased under the condition that the volume of the battery module remains unchanged, and the energy density of the battery module is improved; the insulating shell is arranged at one end of the battery cell close to the tab group, the PCBA and the tab group are wrapped by the insulating shell, the PCBA and the tab group are isolated from the external environment, and at the same time, the output port arranged on the side of the PCBA away from the battery cell is exposed from the opening of the insulating shell, and the electrical connection between the battery module and the external electronic product is realized through the output port. The above-mentioned battery module and the lithium ion battery can prevent the PCBA and the tab group from being damaged when used in high-temperature environment, and at the same time, the insulating shell can also protect the PCBA and the tab group in the case of falling and other accidents, and the environmental adaptability of the battery module and the lithium ion battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The technical solutions of the utility model will be further described in detail below with reference to the drawings and embodiments, and in the drawings:

[0017] Figure 1 is the explosion structure schematic view of the battery module provided by the utility model embodiment;

[0018] Figure 2 is the overall structure schematic view of the battery module provided by the utility model embodiment;

[0019] Figure 3 is the structure schematic view of the battery cell provided by the utility model embodiment.

[0020] The labels for the attached figures are as follows:

[0021] 10. Battery cell; 110. Electrode assembly; 111. First electrode; 112. Second electrode; 20. PCBA; 210. Output port; 30. Insulating shell; 301. Opening. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] This utility model provides a battery module and a lithium-ion battery, such as Figures 1 to 3 As shown, the device includes a battery cell 10, a PCBA 20, and an insulating shell 30. One end of the battery cell 10 is provided with a tab assembly 110, and the top sealing edge of the end of the battery cell 10 with the tab assembly is bent along the height direction of the battery cell 10. The PCBA 20 is located on the side of the tab assembly 110 away from the battery cell 10 and is electrically connected to the tab assembly 110. The side of the PCBA 20 away from the battery cell 10 is provided with an output port 210. The insulating shell 30 is located at the end of the battery cell 10 near the tab assembly 110, and an opening 301 is formed on the insulating shell 30. The insulating shell 30 encloses the PCBA 20 and the tab assembly 110, and the output port 210 is exposed from the opening 301. The output port 210 is used to connect to external electronic products.

[0024] In this embodiment, the top sealing edge of one end of the battery cell 10 where the tab assembly 110 is located is bent along the height direction of the battery cell 10, making the top sealing edge a bent structure, reducing the height of the top sealing edge, reducing the space occupied by the top sealing edge, and then placing the PCBA20 on the side of the tab assembly 110 away from the battery cell 10, the height of the battery module is reduced. Without changing the volume of the battery module, the volume of the battery cell can be increased, thus improving the energy density of the battery module. An insulating shell 30 is provided at the end of the battery cell 10 near the tab assembly 110, which wraps the PCBA20 and the tab assembly 110, isolating them from the external environment. At the same time, the output port 210 provided on the side of the PCBA20 away from the battery cell 10 is exposed from the opening 301 of the insulating shell 30, and the output port 210 enables the battery module to be electrically connected to external electronic products. When the battery module is used in a high-temperature environment, it can prevent PCBA20 and tab assembly 110 from being damaged. At the same time, the insulating shell 30 can also protect PCBA20 and tab assembly 110 in case of accidental drops, thus improving the environmental adaptability of the battery module.

[0025] The number of output ports 210 and openings 301 mentioned above is set according to the connection environment, and is not specifically limited here. (The rest of the text appears to be unrelated and possibly machine-generated.)Figure 1 The example is given that the output port 210 and the opening 301 are respectively provided with four, and the output port 210 and the opening 301 are one-to-one corresponding arrangement.

[0026] As a preferred scheme of the embodiment, refer to Figure 1 and Figure 3 The tab group 110 is in a bending structure along the height direction of the battery cell 10.

[0027] The top sealing edge is in a bending structure, and the corresponding tab group 110 on one side of the battery cell 10 is also in a bending structure along the height direction of the battery cell 10, which reduces the height of the tab group 110 on the battery cell 10 and reduces the occupied space of the tab group 110, thereby increasing the volume of the battery cell 10 and improving the energy density of the battery module under the condition that the volume of the battery module is unchanged.

[0028] As a preferred scheme of the embodiment, refer to Figure 1 and Figure 3 The tab group 110 includes the first tab 111 and the second tab 112 arranged at intervals, and the first tab 111 and the second tab 112 are both in a bending structure; the PCBA 20 is provided with a first nickel sheet (not shown in the figure) and a second nickel sheet (not shown in the figure), the first nickel sheet is electrically connected with the first tab 111, and the second nickel sheet is electrically connected with the second tab 112.

[0029] The battery cell 10 of the embodiment is a square lithium ion battery cell, the tab group 110 includes the first tab 111 and the second tab 112 arranged at intervals, and the first tab 111 and the second tab 112 are both in a bending structure, thereby achieving the purpose of reducing the height of the tab group 110; the PCBA 20 is provided with a first nickel sheet and a second nickel sheet, the first nickel sheet is electrically connected with the first tab 111, and the second nickel sheet is electrically connected with the second tab 112, thereby achieving the electrical connection between the PCBA 20 and the tab group 110.

[0030] As a preferred scheme of the embodiment, the first nickel sheet is welded with the first tab 111, and the second nickel sheet is welded with the second tab 112.

[0031] The first nickel sheet is welded with the first tab 111, and the second nickel sheet is welded with the second tab 112, thereby providing a stable and reliable connection mode for the tab group 110 and the PCBA 20, ensuring good electrical connection between the two, avoiding circuit failure or signal transmission problems caused by poor connection, and further, the above connection mode can save space and further improve the energy density of the battery module.

[0032] As a preferred scheme of the embodiment, refer to Figure 1 The PCBA 20 is arranged in parallel with the battery cell 10 along the height direction of the battery cell 10.

[0033] The PCBA 20 is arranged in parallel with the battery cell 10 along the height direction of the battery cell 10, which can save the size space of the packaged battery module to the maximum and further improve the energy density of the battery module. Meanwhile, the PCBA 20 is convenient for welding with the first and second tabs 111 and 112.

[0034] As a preferred scheme of the present embodiment, the surface of the output port 210 is in a planar structure, and the output port 210 is made of a metal material.

[0035] When the battery module of the present embodiment is applied to an electronic product, the surface of the output port 210 is in a planar structure, which is convenient for the output port 210 to contact with the connecting terminal of the external electronic product. The output port 210 is made of a metal material to realize the electrical connection between the output port 210 and the connecting terminal of the external electronic product, so that the battery module and the electronic product maintain a good electrical connection relationship. Meanwhile, the battery module and the electronic product are convenient to disassemble and assemble, which improves the installation efficiency. In the present embodiment, the output port 210 in the Figure 1 The output port 210 in the present embodiment is a rectangular metal block.

[0036] The output port 210 in the present embodiment can be made of copper, which is a common conductive material and has good conductivity and corrosion resistance.

[0037] As a preferred scheme of the present embodiment, the battery module further comprises a connector (not shown in the figure), which is connected with the output port 210.

[0038] The connector is arranged to realize the electrical connection between the battery module and the external electronic product, and to connect the electrical energy output of the battery cell 10 assembly to the external electronic product or circuit, so as to realize the transmission of electrical energy, data, charging, etc. The connector has the advantages of reliable connection, space saving, convenient maintenance and replacement, etc.

[0039] As a preferred scheme of the present embodiment, the battery module further comprises a plug wire (not shown in the figure), which is connected with the output port 210.

[0040] The plug wire is arranged to realize the electrical connection between the battery module and the external electronic product, and to connect the electrical energy output of the battery cell 10 assembly to the external electronic product or circuit, so as to realize the transmission of electrical energy, data, charging, etc.

[0041] As a preferred scheme of the present embodiment, the insulating shell 30 is formed by injection molding of an injection molding material, and the injection molding material is also filled in the gap between the PCBA 20 and the battery cell 10.

[0042] The insulating shell 30 is formed by injection molding of plastic material, which can ensure the connection strength of the insulating shell 30 and the battery cell 10, and improve the sealing performance of the insulating shell 30 on the tab group 110 and the PCBA 20. The plastic material is also filled in the gap between the PCBA 20 and the battery cell 10, which improves the connection stability between the PCBA 20 and the battery cell 10, and maintains the use performance of the battery module in the case of unexpected device accidents during use.

[0043] As a preferred scheme of the embodiment, the battery cell 10 is a soft package battery cell.

[0044] As a preferred scheme of the embodiment, the plastic material is any one of polypropylene, polyethylene, and polyvinyl chloride.

[0045] The polypropylene, polyethylene, and polyvinyl chloride have good heat resistance and formability, which facilitates the formation of the insulating shell 30 and ensures the sealing and mechanical properties of the insulating shell 30, and improves the environmental adaptability of the battery module.

[0046] The application further discloses a lithium ion battery comprising the battery module in the foregoing embodiment. The lithium ion battery comprises the same structure and advantages as the battery module in the foregoing embodiment. The structure and advantages of the battery module have been described in detail in the foregoing embodiment, and will not be described here.

[0047] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, but not limit them. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced equivalently. All these modifications and replacements shall fall within the protection scope of the claims of the present application.

Claims

1. A battery module, characterized in that, include: A battery cell, wherein one end of the battery cell is provided with a tab assembly, and the top sealing edge of the battery cell at the end where the tab assembly is provided has a bent structure along the height direction of the battery cell; PCBA is located on the side of the electrode assembly away from the battery cell and is electrically connected to the electrode assembly. The side of the PCBA away from the battery cell has an output port. An insulating shell is disposed at one end of the battery cell near the tab assembly. An opening is formed on the insulating shell. The insulating shell encloses the PCBA and the tab assembly, and the output port is exposed from the opening. The output port is used to connect to external electronic products.

2. The battery module according to claim 1, characterized in that, The tab assembly has a bent structure along the height direction of the battery cell.

3. The battery module according to claim 2, characterized in that, The electrode assembly includes a first electrode and a second electrode arranged at intervals, both of which have a bent structure. The PCBA is provided with a first nickel sheet and a second nickel sheet, the first nickel sheet being electrically connected to the first electrode tab, and the second nickel sheet being electrically connected to the second electrode tab.

4. The battery module according to claim 3, characterized in that, The first nickel sheet is welded to the first electrode tab, and the second nickel sheet is welded to the second electrode tab.

5. The battery module according to claim 3, characterized in that, The PCBA is arranged parallel to the battery cell along the height direction of the battery cell.

6. The battery module according to claim 5, characterized in that, The surface of the output port is planar, and the output port is made of metal.

7. The battery module according to claim 5, characterized in that, The battery module also includes a connector that is connected to the output port.

8. The battery module according to claim 5, characterized in that, The battery module also includes a plug wire, which is connected to the output port.

9. The battery module according to claim 1, characterized in that, The insulating shell is formed by injection molding of injection molding compound, which also fills the gap between the PCBA and the battery cell.

10. The battery module according to claim 9, characterized in that, The injection molding compound is any one of polypropylene, polyethylene, and polyvinyl chloride.

11. The battery module according to claim 1, characterized in that, The battery cell is a pouch cell.

12. A lithium-ion battery, characterized in that, Includes the battery module as described in any one of claims 1 to 11.

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