Lithium ion module

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion module. Comprising a shell and a roll core, and the roll core is arranged in the shell; an integrated cover plate is arranged at the upper end of the roll core, a metal sheet is connected to the integrated cover plate, the integrated cover plate is made of an insulating material, and the connection position of the integrated cover plate and the metal sheet is conductive; a protection plate is arranged at the upper end of the integrated cover plate; the upper end of the shell is connected with a top cover; the protection plate realizes different mode modules by controlling the integrated cover plate; through control signals of the protection plate, series connection and parallel connection of the positive terminal and the negative terminal on the integrated cover plate are changed to realize modules in different modes.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion module. Background Art

[0002] With the rapid development of the new energy industry, lithium-ion batteries have been widely used, and more and more people are choosing electric transportation. Electric bicycles and electric motorcycles have become people's first choice for travel;

[0003] Lithium-ion batteries have the advantages of high operating voltage, high specific energy, long cycle life, and no environmental pollution. As a secondary chemical power source that can convert electrical energy and chemical energy into each other, it is regarded as one of the hot candidate technologies for power energy storage systems. Since its birth, its application field has continued to expand and has achieved rapid development. At present, it is not only widely used in mobile communication equipment and portable electronic devices, but also widely used in large electric equipment such as power tools, electric bicycles and electric vehicles;

[0004] However, a lithium-ion module generally has only one mode, and its compatibility with different vehicle models is low. Utility Model Content

[0005] In view of the above problems, the utility model proposes a lithium-ion module, comprising a shell and a winding core, wherein the winding core is arranged inside the shell; an integrated cover plate is arranged on the upper end of the winding core, a metal sheet is connected to the integrated cover plate, the integrated cover plate is made of insulating material, and the connection position between the integrated cover plate and the metal sheet is conductive; a protective plate is arranged on the upper end of the integrated cover plate; a top cover is connected to the upper end of the shell; the protective plate realizes different mode modules by controlling the integrated cover plate.

[0006] Furthermore, a cavity is opened inside the shell, and the winding core is placed in the cavity; the number of the cavities is 2N, where N is an integer ≥1.

[0007] Furthermore, a positive terminal and a negative terminal are provided on the integrated cover plate.

[0008] Furthermore, the integrated cover plate is provided with welding ribs on the outer rings of the positive terminal and the negative terminal.

[0009] Furthermore, the protection board is provided with a total positive pole, a total negative pole and an information collection module.

[0010] Furthermore, the top cover includes a total positive electrode column sealant, a total negative electrode column sealant and a polymer material substrate.

[0011] Furthermore, the total positive electrode column and the total negative electrode column are connected to the protection plate by bolts or laser welding.

[0012] Furthermore, the metal sheet and the integrated cover plate are connected by hot riveting, snap-fitting or injection molding.

[0013] Furthermore, the top cover and the shell are connected by gluing, laser welding, ultrasonic welding or hot plate welding.

[0014] Furthermore, the shell is in a rectangular or cylindrical shape.

[0015] The present invention is compatible with modules of different voltages and currents through a protection board. The protection board has a battery capacity balancing function to realize charging of multiple modules with different capacities. The same structural parts are used to control signals through the protection board to change the series connection or parallel connection of the positive and negative terminals on the integrated cover plate to realize modules of different modes.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the internal structure of the present application is shown.

[0019] Figure 2 A top view of the integrated cover plate in an embodiment of the utility model is shown.

[0020] Figure 3 A cross-sectional view of an integrated cover plate in an embodiment of the utility model is shown.

[0021] Figure 4 A top view of the protection plate in an embodiment of the utility model is shown.

[0022] In the figure, 1. shell; 2. winding core; 3. integrated cover plate; 4. metal sheet; 5. protection plate; 6. top cover; 7. cavity; 31. positive terminal; 32. negative terminal; 33. welding rib; 51. total positive pole column; 52. total negative pole column; 53. information acquisition module. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The present invention provides a lithium ion module to solve the problem that the lithium ion module in the prior art has a single mode and a small application range. Figure 1 , including a shell 1 and a winding core 2, the winding core 2 is arranged inside the shell 1; an integrated cover plate 3 is arranged on the upper end of the winding core 2, a metal sheet 4 is connected to the integrated cover plate 3, the integrated cover plate 3 is an insulating material, and the connection position between the integrated cover plate 3 and the metal sheet 4 is conductive; a protective plate 5 is arranged on the upper end of the integrated cover plate 3; a top cover 6 is connected to the upper end of the shell 1; the protective plate 5 realizes different mode modules by controlling the integrated cover plate 3; by placing the winding core 2 inside the shell 1, an electric current and voltage are generated through an electrochemical system; the integrated cover plate 3 is arranged on the winding core 2 to play a supporting, insulating and sealing role and conductive function; a metal sheet 4 is arranged on the integrated cover plate 3, and the metal sheet 4 is used to realize the series and parallel connection between the winding cores 2, so as to realize different voltages and capacities of the module; a protection plate 5 is installed on the upper end of the integrated cover plate 3, and the protection plate 5 protects the safe operation of the module during the charging and discharging process of the module, and at the same time, the protection plate 5 realizes different mode modules by controlling the disconnection and merging of the current on the integrated cover plate 3; after the internal assembly is completed, the top cover 6 is installed with the shell 1, and the top cover 6 seals and protects the inside of the module; thus, during the operation, the protection plate 5 realizes different mode modules by controlling the integrated cover plate 3, thereby expanding the application range of the module.

[0025] In one embodiment, a cavity 7 is opened inside the shell 1, and the core 2 is placed in the cavity 7; the number of the cavities 7 is 2N, where N is an integer ≥1; 2N cavities 7 are set inside the shell 1, and the core 2 is placed inside the cavity 7 to achieve stable support for a single core 2, and the cavity 7 can be rectangular or circular; if the number of cores 2 is the same as the number of cavities 7, the current on the integrated cover plate 3 can be disconnected and combined according to the protection plate 5 to realize different mode modules; at the same time, the number of cores 2 in the cavity 7 can also be adjusted. When N≥3, the number of cores 2 can be 2 (N-1) or 2 (N-2) to achieve different capacities and adapt to different types of low-speed electric vehicles.

[0026] In one embodiment, reference Figure 2The integrated cover plate 3 is provided with a positive terminal 31 and a negative terminal 32; the positive terminal 31 and the negative terminal 32 on the integrated cover plate 3 conduct electricity, so that the current flows through the integrated cover plate 3 to the metal sheet 4, and the other parts of the integrated cover plate 3 are insulating materials.

[0027] In one embodiment, reference Figure 3 The integrated cover plate 3 is provided with welding ribs 33 on the outer rings of the positive terminal 31 and the negative terminal 32; the welding ribs 33 are annular bosses, which can seal the circular holes on the integrated cover plate 3 after melting, so that the winding core 2 is located inside the sealed cavity 7, thereby improving the overall safety of the module.

[0028] refer to Figure 4 The protection board 5 is provided with a total positive pole column 51, a total negative pole column 52 and an information acquisition module 53; the information acquisition module 53 on the protection board 5 collects the overall information, and then controls the signal to change the series connection and parallel connection of the positive terminal 31 and the negative terminal 32 on the integrated cover plate 3 according to the collected signal information to realize different mode modules.

[0029] The top cover 6 includes a total positive electrode column 51 sealant, a total negative electrode column 52 sealant and a polymer material substrate; the total positive electrode column 51 sealant and the total negative electrode column 52 sealant are used to seal the electrode position to improve the sealing effect of the module; the polymer material has the characteristics of high strength and high toughness, which can effectively restrain the expansion force of the battery cell, and also has flame retardant and thermal conductive properties, which can effectively control the thermal runaway of the core 2, and the polymer material substrate has the function of sealing and supporting the module.

[0030] The total positive pole column 51 and the total negative pole column 52 are connected to the protection plate 5 by bolts or laser welding; the total positive pole column 51 and the total negative pole column 52 on the protection plate 5 are connected by bolts, which is convenient for later disassembly and replacement; laser welding is used to ensure the quality and reliability of the pole welds.

[0031] The metal sheet 4 is connected to the integrated cover plate 3 by hot riveting, snap-fitting or injection molding; hot riveting can improve the strength of riveting, reduce the required external force, and work safely and reliably in harsh environments. The hot riveting column has the characteristics of high strength, high rigidity, heat resistance and corrosion resistance; snap-fitting is used for connection, which is convenient for installation and disassembly; injection molding combines the advantages of plastic and metal to improve the strength of the product.

[0032] The top cover 6 is connected to the shell 1 by gluing, laser welding, ultrasonic welding or hot plate welding; the sealing effect of gluing is good, and the aging resistance of the sealant is also longer; the weld of laser welding is relatively neat and does not require grinding after welding; ultrasonic welding has a fast welding speed, high welding strength and good sealing; hot plate welding can form a uniform weld at the welding joint, provide strong structural strength, have good sealing performance, and can prevent liquid, gas and solid penetration to a certain extent.

[0033] The shell 1 is in a rectangular or cylindrical shape; the shell 1 in the present disclosure can be rectangular or cylindrical and can be customized according to needs; the shell shape can also be the same as the outer dimensions of a lead-acid battery and can be used instead of a lead-acid battery.

[0034] The present disclosure is compatible with modules of different voltages and currents through the protection board 5. The protection board 5 has a battery capacity balancing function to realize charging of multiple modules with different capacities. The same structural parts are used to control the signal through the protection board 5 to change the series connection and parallel connection of the positive and negative terminals 32 on the integrated cover plate 3 to realize different mode modules.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lithium ion module, characterized in that: The invention comprises a shell (1) and a winding core (2), wherein the winding core (2) is arranged inside the shell (1); an integrated cover plate (3) is arranged at the upper end of the winding core (2), a metal sheet (4) is connected to the integrated cover plate (3), the integrated cover plate (3) is made of insulating material, and the connection position between the integrated cover plate (3) and the metal sheet (4) is conductive; a protective plate (5) is arranged at the upper end of the integrated cover plate (3); a top cover (6) is connected to the upper end of the shell (1); the protective plate (5) realizes different mode modules by controlling the integrated cover plate (3).

2. A lithium ion module according to claim 1, characterized in that: A cavity (7) is provided inside the shell (1), and the winding core (2) is placed in the cavity (7); the number of the cavities (7) is 2N, where N is an integer ≥1.

3. A lithium ion module according to claim 2, characterized in that: The integrated cover plate (3) is provided with a positive terminal (31) and a negative terminal (32).

4. A lithium ion module according to claim 3, characterized in that: The integrated cover plate (3) is provided with welding ribs (33) on the outer rings of the positive terminal (31) and the negative terminal (32).

5. A lithium ion module according to claim 4, characterized in that: The protection plate (5) is provided with a total positive pole column (51), a total negative pole column (52) and an information collection module (53).

6. A lithium ion module according to claim 5, characterized in that: The top cover (6) comprises a total positive electrode column (51) sealant, a total negative electrode column (52) sealant and a polymer material substrate.

7. A lithium ion module according to claim 6, characterized in that: The total positive electrode column (51) and the total negative electrode column (52) are connected to the protection plate (5) by bolts or laser welding.

8. A lithium ion module according to claim 7, characterized in that: The metal sheet (4) and the integrated cover plate (3) are connected by hot riveting, snap-fitting or injection molding.

9. A lithium ion module according to claim 8, characterized in that: The top cover (6) is connected to the shell (1) by gluing, laser welding, ultrasonic welding or hot plate welding.

10. A lithium ion module according to claim 9, characterized in that: The shell (1) is in a rectangular or cylindrical shape.

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