Lithium ion battery pack convenient to assemble

Abstract

The utility model provides a lithium ion battery pack convenient to assemble, which comprises a top cover, a bottom plate and a shell, the top cover and the bottom plate are respectively clamped at the top and the bottom of the shell, a plurality of lithium ion battery cells are arranged between the top cover and the bottom plate, and a series wire group is connected in series between two adjacent lithium ion battery cells. The upper end and the lower end of the lithium ion battery core are sleeved with an upper cap and a lower cap respectively, the two ends of the series wire set extend into the upper cap and the lower cap respectively, the upper cap and the lower cap are both sleeved with transverse partition plates, the transverse partition plates are arranged in the shell, the outer side faces of the transverse partition plates are tightly attached to the inner side face of the shell, and the lower cap is arranged on the bottom plate in a matched mode. The upper cap is arranged on the top cover in a matched mode. According to the utility model, a plurality of lithium ion battery cells are assembled together, so that the purpose of convenience in assembly, disassembly and maintenance is realized, and the lithium ion battery is simple in structure and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium ion battery pack which is easy to assemble. Background Art

[0002] Lithium batteries are batteries that use lithium metal or lithium alloy as anode materials and non-aqueous electrolyte solutions. Lithium batteries were invented by Edison. Lithium batteries include a cover structure, which includes a positive electrode column, a conductive sheet, a top cover sheet, and a plastic cover. The conductive sheet is connected to the positive electrode column, the positive electrode column is insulated from the top cover sheet, and the plastic cover is connected to the top cover sheet. The difference between lithium batteries and lithium-ion batteries is that the former is a primary battery, while the latter is a rechargeable battery.

[0003] In the prior art, when a lithium-ion battery pack is assembled together, a plurality of lithium-ion battery cells are generally placed close together, then bundled with tape, and finally placed in a battery box, and then connected together in series or in parallel to form a lithium-ion battery pack. However, this combination method, firstly, is close together, which easily causes poor heat dissipation of the internal lithium-ion battery cells; secondly, it is inconvenient to disassemble and replace. Utility Model Content

[0004] The utility model aims to provide a lithium-ion battery pack that is easy to assemble to overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is specifically implemented as follows:

[0006] The utility model provides a lithium-ion battery pack that is easy to assemble, comprising a top cover, a bottom plate and an outer shell, wherein the top cover and the bottom plate are respectively clamped on the top and bottom of the outer shell, and a plurality of lithium-ion battery cells are arranged between the top cover and the bottom plate, and a series line group is connected in series between two adjacent lithium-ion battery cells, and an upper cap and a lower cap are respectively sleeved on the upper end and the lower end of the lithium-ion battery cell, and the two ends of the series line group extend into the upper cap and the lower cap respectively, and a transverse partition is sleeved on the upper cap and the lower cap, and the transverse partition is arranged inside the outer shell, and the outer side surface of the transverse partition is tightly attached to the inner side surface of the outer shell, the lower cap is matched and arranged on the bottom plate, and the upper cap is matched and arranged on the top cover.

[0007] A heat sink is inlaid and fixed on the shell, and a round tube for injecting thermal grease is welded on the heat sink. The space formed by the shell and the transverse partition is filled with thermal grease.

[0008] As a further solution of the utility model, it also includes a connector, which is respectively fixed on the top cover and the bottom plate, and the upper connector passes through the upper cover cap to be connected to the positive electrode of the lithium-ion battery core, and the lower connector passes through the bottom plate to be connected to the negative electrode of the lithium-ion battery core.

[0009] As a further solution of the utility model, the series line group includes a metal connecting wire, a positive connecting plate and a negative connecting plate, the positive connecting plate and the negative connecting plate are respectively connected to the two ends of the metal connecting wire, the positive connecting plate is matched and connected to the positive electrode of the lithium-ion battery cell, and the negative connecting plate is matched and connected to the negative electrode of another lithium-ion battery cell.

[0010] As a further solution of the utility model, the top cover and the bottom plate are both provided with opening grooves, the inner part of the shell is integrally connected with a limiting protrusion, the limiting protrusion is matched and arranged in the opening groove, and the shell is fixedly connected to the top cover and the bottom plate respectively.

[0011] As a further solution of the utility model, the lower part of the upper cover cap and the upper part of the lower cover cap are both integrally connected with a retaining ring.

[0012] As a further solution of the utility model, a hole for the joint to pass through is provided at the middle position of the upper end of the upper cover cap and the middle position of the lower end of the lower cover cap.

[0013] The utility model provides a lithium-ion battery pack that is easy to assemble, and has the beneficial effects of achieving the purpose of convenient assembly and disassembly and maintenance by assembling multiple lithium-ion battery cells together, and having a simple structure and convenient maintenance, and filling the inside of the shell with thermal conductive silicone grease, which also achieves efficient heat dissipation of the lithium-ion battery pack in a running state, thereby ensuring the stability and safety of the operation of the lithium-ion battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only 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.

[0015] Figure 1 It is a schematic structural diagram of multiple lithium-ion battery cells of the utility model.

[0016] Figure 2 It is a partial cross-sectional view of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the shell in the utility model.

[0019] Figure 5 It is a schematic diagram of the structure of the lithium-ion battery core in the utility model.

[0020] Figure 6 It is a structural schematic diagram of the lower cover cap in the utility model.

[0021] Figure 7 It is a structural schematic diagram of the upper cover cap in the utility model.

[0022] Figure 8 It is a structural schematic diagram of the series line group in the utility model.

[0023] In the figure: 1. top cover; 2. outer shell; 3. heat sink; 4. bottom plate; 5. partition; 6. lithium-ion battery cell; 7. lower cover cap; 8. series line group; 9. upper cover cap; 10. connector; 11. opening groove; 21. limiting protrusion; 31. round tube; 81. metal connecting wire; 82. positive connecting plate; 83. negative connecting plate. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0025] See also Figure 1-8 The utility model provides a conveniently assembled lithium-ion battery pack, comprising a top cover 1, a bottom plate 4 and a shell 2, wherein the top cover 1 and the bottom plate 4 are respectively snapped onto the top and bottom of the shell 2, and a plurality of lithium-ion battery cells 6 are arranged between the top cover 1 and the bottom plate 4, and a series connection line group 8 is connected in series between two adjacent lithium-ion battery cells 6, and an upper cover cap 9 and a lower cover cap 7 are respectively sleeved on the upper and lower ends of the lithium-ion battery cells 6, and the two ends of the series connection line group 8 extend into the upper cover cap 9 and the lower cover cap 7 respectively, and a transverse partition 5 is sleeved on the upper cover cap 9 and the lower cover cap 7, and the transverse partition 5 is arranged inside the shell 2, and the outer side surface of the transverse partition 5 is in close contact with the inner side surface of the shell 2, the lower cover cap 7 is matched and arranged on the bottom plate 4, and the upper cover cap 9 is matched and arranged on the top cover 1.

[0026] A heat sink 3 is embedded and fixed on the outer shell 2, and a round tube 31 for injecting thermal grease is welded on the heat sink 3. The space formed by the outer shell 2 and the transverse partition 5 is filled with thermal grease. By filling the thermal grease into the outer shell 2 and filling the space formed by the outer shell 2 and the transverse partition 5, the heat of the lithium-ion battery core 6 is easily transferred to the heat sink 3 through the thermal grease, thereby efficiently dissipating the heat of the lithium-ion battery core 6.

[0027] It also includes a connector 10, which is fixed on the top cover 1 and the bottom plate 4 respectively, and the upper connector 10 passes through the upper cover cap 9 to be connected to the positive electrode of the lithium-ion battery core 6, and the lower connector 10 passes through the bottom plate 4 to be connected to the negative electrode of the lithium-ion battery core 6, so as to facilitate connecting the connector 10 to an external charging and discharging device, and then connecting the lithium-ion battery pack to the external charging and discharging device.

[0028] During use, the utility model connects two adjacent lithium-ion battery cells 6 in series through the series line group 8, and then respectively sets the upper cap 9 and the lower cap 7 on the upper and lower ends of the lithium-ion battery cells 6, so that the positive electrode of the lithium-ion battery cell 6 is tightly connected to the positive electrode connecting plate 82 of the series line group 8 through the upper cap 9 and the lower cap 7, and the negative electrode of the lithium-ion battery cell 6 is tightly connected to the negative electrode connecting plate 83 of the series line group 8, and then the two transverse partitions 5 are respectively set on the upper cap 9 and the lower cap 7, so that multiple lithium-ion battery cells 6 are assembled together, and the two transverse partitions 5 are respectively set on the upper cap 9 and the lower cap 7. A gap is left between the two connected lithium-ion battery cells 6 to facilitate the filling of thermal grease, and then the assembled lithium-ion battery pack is connected to the top cover 1 and the bottom plate 4 respectively, and then the shell 2 is sleeved on the top cover 1 and the bottom plate 4 and fixed by bolts, and finally the space formed by the transverse partition 5 and the shell 2 is filled with thermal grease through the round tube 31, so that efficient heat dissipation is achieved for the lithium-ion battery pack in operation. At the same time, by disassembling the shell 2, multiple lithium-ion battery cells 6 can be disassembled, so as to achieve the purpose of convenient assembly and disassembly and maintenance. It has a simple structure and is easy to maintain.

[0029] like Figure 2 and Figure 8 As shown, the series line group 8 includes a metal connecting wire 81, a positive connecting plate 82 and a negative connecting plate 83. The positive connecting plate 82 and the negative connecting plate 83 are respectively connected to the two ends of the metal connecting wire 81. The positive connecting plate 82 is matched and connected to the positive electrode of the lithium-ion battery cell 6, and the negative connecting plate 83 is matched and connected to the negative electrode of the other lithium-ion battery cell 6. The positive connecting plate 82 is connected to the positive electrode of one of the lithium-ion battery cells 6, and the negative connecting plate 83 is connected to the negative electrode of the other lithium-ion battery cell 6, so that the two lithium-ion battery cells 6 are connected in series.

[0030] like Figure 1-4 As shown, an opening groove 11 is provided on the top cover 1 and the bottom plate 4, and a limiting protrusion 21 is integrally connected to the inside of the outer shell 2. The limiting protrusion 21 is matched and arranged in the opening groove 11. The outer shell 2 is fixedly connected to the top cover 1 and the bottom plate 4 respectively, so that the two outer shells 2 are combined with the top cover 1 and the bottom plate 4, thereby achieving the purpose of combined assembly.

[0031] like Figure 7 and Figure 8As shown, the lower part of the upper cover cap 9 and the upper part of the lower cover cap 7 are integrally connected with a retaining ring, so as to limit the two transverse partitions 5.

[0032] like Figure 2 , Figure 7 and Figure 8 As shown, holes for the connector 10 to pass through are provided at the middle position of the upper end of the upper cap 9 and the middle position of the lower end of the lower cap 7, so that the connector 10 can pass through the upper cap 9 and the lower cap 7 to be connected to the positive and negative electrodes of the lithium-ion battery core 6 respectively.

[0033] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A lithium-ion battery pack that is easy to assemble, comprising a top cover (1), a bottom plate (4) and a housing (2), characterized in that: The top cover (1) and the bottom plate (4) are respectively clamped on the top and bottom of the outer shell (2), and a plurality of lithium-ion battery cells (6) are arranged between the top cover (1) and the bottom plate (4), and a series connection line group (8) is connected in series between two adjacent lithium-ion battery cells (6), and an upper cover cap (9) and a lower cover cap (7) are respectively sleeved on the upper and lower ends of the lithium-ion battery cells (6), and the two ends of the series connection line group (8) extend into the upper cover cap (9) and the lower cover cap (7) respectively, and a transverse partition (5) is sleeved on the upper cover cap (9) and the lower cover cap (7), and the transverse partition (5) is arranged inside the outer shell (2), and the outer side surface of the transverse partition (5) is tightly attached to the inner side surface of the outer shell (2), the lower cover cap (7) is matched and arranged on the bottom plate (4), and the upper cover cap (9) is matched and arranged on the top cover (1); A heat sink (3) is embedded and fixed on the outer shell (2), and a round tube (31) for injecting thermal grease is welded on the heat sink (3), and the space formed by the outer shell (2) and the transverse partition (5) is filled with thermal grease.

2. A conveniently assembled lithium-ion battery pack according to claim 1, characterized in that: It also includes a connector (10), which is respectively fixed on the top cover (1) and the bottom plate (4), and the upper connector (10) passes through the upper cover cap (9) to be connected to the positive electrode of the lithium-ion battery core (6), and the lower connector (10) passes through the bottom plate (4) to be connected to the negative electrode of the lithium-ion battery core (6).

3. A conveniently assembled lithium-ion battery pack according to claim 1, characterized in that: The series line group (8) comprises a metal connecting line (81), a positive connecting plate (82) and a negative connecting plate (83), wherein the positive connecting plate (82) and the negative connecting plate (83) are respectively connected to two ends of the metal connecting line (81), the positive connecting plate (82) is matched and connected to the positive electrode of a lithium-ion battery cell (6), and the negative connecting plate (83) is matched and connected to the negative electrode of another lithium-ion battery cell (6).

4. The conveniently assembled lithium-ion battery pack according to claim 1, characterized in that: The top cover (1) and the bottom plate (4) are both provided with an opening groove (11); a limiting protrusion (21) is integrally connected to the inside of the shell (2); the limiting protrusion (21) is matched and arranged in the opening groove (11); and the shell (2) is fixedly connected to the top cover (1) and the bottom plate (4) respectively.

5. The conveniently assembled lithium-ion battery pack according to claim 1, characterized in that: The lower part of the upper cover cap (9) and the upper part of the lower cover cap (7) are both integrally connected with a retaining ring.

6. A conveniently assembled lithium-ion battery pack according to claim 5, characterized in that: A hole for the joint (10) to pass through is provided at the middle position of the upper end of the upper cover cap (9) and at the middle position of the lower end of the lower cover cap (7).

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