Small-sized battery module and small-sized battery pack

Abstract

The utility model discloses a small-sized battery module and a small-sized battery pack, the small-sized battery module comprises a lower mould shell and an upper mould shell which can be buckled with each other, positioning ring shells which are oppositely arranged are arranged in the lower mould shell and the upper mould shell, the inner diameter of each positioning ring shell is matched with the diameter of a battery to be assembled, and the positioning ring shells are arranged in the lower mould shell and the upper mould shell. The upper mold shell and the lower mold shell are arranged in the corresponding lower mold shell and the upper mold shell in a mutually clinging manner; connecting holes coaxially corresponding to the positioning ring shells one by one are formed in the upper mold shell in a penetrating manner, and the diameter of each connecting hole is larger than that of a pole of a battery to be assembled and smaller than that of the battery to be assembled. The utility model has the advantages of reasonable structural design, low manufacturing cost, portability, light weight and the like.

Description

Technical Field

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

[0002] With the rapid development of the new energy industry, the potential safety hazards of batteries are well-known to the public. The society's requirements for the energy density, safety performance, and rapid charging of lithium-ion batteries are gradually increasing. As a currently recognized solution, the existing conventional battery pack structure is relatively complex, and the volume of the battery pack is large, which does not meet the current people's requirements for a small-sized and low-cost battery pack. Summary of the Utility Model

[0003] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is: how to provide a small battery module and a small battery pack with reasonable structural design, low manufacturing cost, easy to carry, and lightweight.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A small battery module, characterized in that it includes a lower mold shell and an upper mold shell that can be buckled with each other. The lower mold shell and the upper mold shell are provided with positioning ring shells facing each other. The inner diameter of the positioning ring shell matches the diameter of the battery to be assembled, and they are arranged closely in the corresponding lower mold shell and upper mold shell. The upper mold shell is provided with connection holes that are coaxially corresponding to the positioning ring shells one by one. The diameter of the connection hole is larger than the diameter of the pole column of the battery to be assembled and smaller than the diameter of the battery to be assembled.

[0006] During use, place the cylindrical battery in the positioning ring shell of the lower mold shell, and then buckle the upper mold shell on the lower mold shell. The pole column of the cylindrical battery is aligned with the connection hole on the upper mold shell. Since the diameter of the connection hole is larger than the diameter of the pole column, both the positive and negative electrodes of the battery can be exposed through the connection hole, facilitating the welding connection between the batteries. In the above structure, since the positioning ring shells are arranged closely, a hollow gap is formed between adjacent positioning ring shells, so that the positioning ring shells can both position the cylindrical battery, facilitating assembly, and reduce the mass of the battery module, which is beneficial to lightweight. The above structure is simple, small in volume, and low in manufacturing cost.

[0007] Further, the height of the positioning ring shell matches the depth of the inner cavity of the corresponding lower mold shell and upper mold shell.

[0008] In this way, a honeycomb-like support structure can be formed in the inner cavities of the upper mold shell and the lower mold shell through the closely arranged positioning ring shells, thereby increasing the overall strength and stability of the upper mold shell and the lower mold shell, being able to better protect the internal battery, and improving the protection effect.

[0009] Further, the positioning ring shells are arranged in a row of positioning ring shells in contact with each other in sequence along the transverse or longitudinal direction of the corresponding lower die shell and upper die shell, and multiple rows of the row of positioning ring shells are arranged along the longitudinal or transverse direction of the corresponding lower die shell and upper die shell.

[0010] Further, two adjacent rows of the row of positioning ring shells are arranged in contact with each other with a dislocation in the length direction of the row of positioning ring shells, and the dislocation distance is equal to the radius of the positioning ring shell.

[0011] Further, a limiting flange is formed by protruding and extending along the axial direction of the positioning ring shell on the outer side of the edge of the upper die shell or lower die shell, and a limiting groove matching the limiting flange is formed by recessing along the axial direction of the positioning ring shell on the outer side of the edge of the lower die shell or upper die shell, and the limiting flange is detachably buckled on the limiting groove.

[0012] Further, a connecting block is formed by protruding on the inner side of the upper die shell or lower die shell, and a threaded hole is arranged on the connecting block along the axial direction of the positioning ring shell; a bolt hole corresponding to the threaded hole is arranged on the lower die shell or upper die shell.

[0013] Further, the connecting block is located between two adjacent positioning ring shells, and a plurality of the connecting blocks are arranged at intervals along the edge of the corresponding upper die shell or lower die shell.

[0014] Further, a counterbore corresponding to the threaded hole is arranged on the lower die shell or upper die shell, and the bolt hole is arranged through the bottom of the counterbore.

[0015] Further, the lower die shell and the corresponding positioning ring shell are integrally formed; the upper die shell and the corresponding positioning ring shell are integrally formed.

[0016] A small battery pack, characterized in that it includes a housing and the small battery module as described above; the small battery module is arranged in the housing.

[0017] In summary, the utility model has the advantages of reasonable structural design, low manufacturing cost, convenient to carry, lightweight, etc. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the battery pack.

[0019] Figure 2 It is a schematic diagram of the assembly structure of the lower housing and the battery module.

[0020] Figure 3 It is a schematic diagram of the overall structure of the battery module.

[0021] Figure 4It is a top view structural schematic diagram of the lower mold shell.

[0022] Figure 5 It is an overall structural schematic diagram of the lower mold shell.

[0023] Figure 6 It is a bottom view structural schematic diagram of the upper mold shell.

[0024] Figure 7 and Figure 8 It is an overall structural schematic diagram of the upper mold shell.

[0025] Figure 9 It is an overall structural schematic diagram of the lower shell.

[0026] Figure 10 and Figure 11 It is an overall structural schematic diagram of the upper cover body. Specific embodiments

[0027] The following further elaborates on the present utility model in conjunction with embodiments.

[0028] During specific implementation, as Figures 1 to 11 shown, a small battery pack includes a small battery pack housing and a small battery module. As Figure 2 shown, the small battery module is arranged inside the small battery pack housing; the small battery module includes a lower mold shell 21 and an upper mold shell 22 that can be mutually buckled. There are positioning ring shells 23 arranged opposite to each other inside the lower mold shell 21 and the upper mold shell 22. The inner diameter of the positioning ring shell 23 matches the diameter of the battery to be assembled, and they are arranged closely next to each other inside the corresponding lower mold shell 21 and upper mold shell 22; through holes corresponding to the positioning ring shells 23 one by one and coaxial are provided on the upper mold shell 22. The diameter of the through hole 24 is larger than the diameter of the pole post of the battery to be assembled and smaller than the diameter of the battery to be assembled; as Figure 5 and Figure 7 shown, the height of the positioning ring shell 23 matches the depth of the inner cavity of the corresponding lower mold shell 21 and upper mold shell 22.

[0029] The positioning ring shells 23 are arranged in sequence and closely next to each other along the transverse direction (width direction) of the corresponding lower mold shell 21 and upper mold shell 22 to form a row of positioning ring shells. Multiple rows of the row of positioning ring shells are arranged along the longitudinal direction (length direction) of the corresponding lower mold shell 21 and upper mold shell 22; adjacent two rows of the row of positioning ring shells are arranged with a dislocation and closely next to each other in the length direction of the row of positioning ring shells, and the dislocation distance is equal to the radius of the positioning ring shell 23.

[0030] An outer edge of the upper mold shell 22 protrudes and extends axially along the positioning ring shell 23 to form a limiting flange 25. An outer edge of the lower mold shell 21 is recessed axially along the positioning ring shell 23 to form a limiting groove 26 that matches the limiting flange 25, and the limiting flange 25 is detachably snapped onto the limiting groove 26. An inner side of the lower mold shell 21 has a protruding connection block 27, and the connection block 27 has a threaded hole axially arranged along the positioning ring shell 23; the connection block 27 is located between two adjacent positioning ring shells 23 and is provided in multiple numbers at intervals along an edge of the corresponding upper mold shell 22 or lower mold shell 21; the upper mold shell 22 has a bolt hole corresponding to the threaded hole; as shown in the figure, the upper mold shell 22 has a counterbore 28 corresponding to the threaded hole, and the bolt hole is penetratively arranged at the bottom of the counterbore. In this embodiment, the lower mold shell 21 and the corresponding positioning ring shell 23 are integrally formed; the upper mold shell 22 and the corresponding positioning ring shell 23 are integrally formed.

[0031] The small battery pack housing includes a lower housing 11 and an upper cover 12 that can be snap-fitted with each other. A protruding side rib plate 13 is vertically arranged on a side wall of the lower housing 11, and a protruding bottom rib plate 14 is provided at the bottom, and the bottom rib plate 14 is perpendicular to the side wall of the lower housing 11; the side rib plate 13 and the bottom rib plate 14 are both provided in multiple numbers at intervals circumferentially along the side wall of the lower housing 11; a distance between the side rib plates 13 on opposite side walls of the lower housing 11 matches a corresponding dimension of a battery module to be assembled.

[0032] As Figure 9 shown, the bottom rib plate 14 and the side rib plate 13 are connected to form an L-shaped rib plate in one-to-one correspondence. Among them, the bottom rib plate 14 includes a long rib plate that extends through along the length direction of the lower housing 11, the long rib plate is located in the middle of the lower housing 11, and multiple long rib plates are arranged at intervals along the width direction of the lower housing 11; all other bottom rib plates 14 are arranged along the width direction of the lower housing 11.

[0033] A handle strap 15 is connected to the lower housing 11, and two ends of the handle strap 15 are respectively connected to side walls on two sides in the width direction of the lower housing 11. Specifically, there are protruding columns 16 outside the side wall of the lower housing 11, and a limiting plate is formed to protrude radially at an end of the protruding column 16; the handle strap 15 has a through hole, and a diameter of the through hole is larger than a diameter of the limiting plate; a hanging groove is formed at the through hole and extends towards an outer end of the handle strap 15, and a width of the hanging groove is larger than a diameter of the protruding column 16 and smaller than the diameter of the limiting plate; the handle strap 15 is detachably hung on the protruding column 16 of the lower housing 11 through the through hole; as Figure 10 and Figure 11As shown, in this embodiment, the side surface of the upper cover body 12 is also provided with a convex column 16.

[0034] The lower shell 11 and the upper cover body 12 are provided with grooves corresponding to the hand-carrying strap 15. The bottom of the groove protrudes into the inner cavities of the corresponding lower shell 11 and upper cover body 12. The width of the groove matches the width of the hand-carrying strap 15, and the depth matches the thickness of the hand-carrying strap 15.

[0035] As Figure 10 shown, the top of the upper cover body 12 is prominently provided with a limit column 17 for abutting against the battery module to be assembled. A plurality of limit columns 17 are circumferentially spaced along the side wall of the upper shell 12.

[0036] In this embodiment, a positioning flange 18 protrudes and extends along the side wall direction on the outer edge of the lower shell 11 or the upper cover body 12. A positioning groove 19 that matches the positioning flange 18 is recessed along the side wall direction on the outer edge of the upper cover body 12 or the lower shell 11. The positioning flange 18 is detachably buckled on the positioning groove 19. A connecting column is prominently formed on the inner side wall of the lower shell 11, and a vertically arranged threaded hole is provided on the connecting column. A counterbore corresponding to the threaded hole is provided on the upper cover body 12, and a bolt hole is provided through the bottom of the counterbore.

[0037] During use, the cylindrical battery is placed in the positioning ring shell of the lower die shell, and then the upper die shell is buckled on the lower die shell. The pole columns of the cylindrical battery are aligned with the connecting holes on the upper die shell. Since the diameter of the connecting hole is larger than the diameter of the pole column, both the positive and negative electrodes of the battery can be exposed through the connecting hole, facilitating welding connection between the batteries. After the upper die shell and the lower die shell are fixedly connected by bolts to form a battery module, the battery module is then placed into the lower shell. As Figure 2 shown, the bottom of the battery module is supported on the bottom rib plate, and the sides are respectively abutted against the side rib plates, so as to form a buffer gap between the battery module and the side wall of the lower shell. Once a collision occurs, the side rib plates and the bottom rib plate can prevent the battery module from being damaged. At the same time, due to the gap between the battery module and the side wall of the lower shell, the weight of the shell can also be lighter, facilitating handling or carrying.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A small battery module, characterized in that: The invention comprises a lower mold shell (21) and an upper mold shell (22) which can be interlocked, wherein the lower mold shell (21) and the upper mold shell (22) have positioning ring shells (23) arranged opposite to each other, the inner diameter of the positioning ring shells (23) matches the diameter of the battery to be assembled, and the positioning ring shells (23) are arranged closely to each other in the corresponding lower mold shell (21) and the upper mold shell (22); the upper mold shell (22) is provided with a connecting hole (24) which is coaxial with the positioning ring shell (23), and the diameter of the connecting hole (24) is larger than the pole diameter of the battery to be assembled, but smaller than the diameter of the battery to be assembled.

2. The small battery module according to claim 1, characterized in that: The height of the positioning ring shell (23) matches the inner cavity depth of the corresponding lower mold shell (21) and upper mold shell (22).

3. The small battery module according to claim 1 or 2, characterized in that: The positioning ring shells (23) are arranged in sequence along the horizontal or vertical direction of the corresponding lower mold shell (21) and upper mold shell (22) to form positioning ring shell rows, and the positioning ring shell rows are arranged in multiple rows along the longitudinal or horizontal direction of the corresponding lower mold shell (21) and upper mold shell (22).

4. The small battery module according to claim 3, characterized in that: Two adjacent rows of the positioning ring shells are staggered and arranged next to each other in the length direction of the positioning ring shells, and the staggered distance is equal to the radius of the positioning ring shells (23).

5. The small battery module according to claim 1 or 2, characterized in that: The outer side of the edge of the upper mold shell (22) or the lower mold shell (21) protrudes and extends along the axial direction of the positioning ring shell (23) to form a limiting flange (25), and the outer side of the edge of the lower mold shell (21) or the upper mold shell (22) is recessed along the axial direction of the positioning ring shell (23) to form a limiting groove (26) matching the limiting flange (25), and the limiting flange (25) is detachably buckled on the limiting groove (26).

6. The small battery module according to claim 1 or 2, characterized in that: The inner side of the upper mold shell (22) or the lower mold shell (21) has a protruding connection block (27), and the connection block (27) has a threaded hole arranged along the axial direction of the positioning ring shell (23); the lower mold shell (21) or the upper mold shell (22) has a bolt hole arranged corresponding to the threaded hole.

7. The small battery module according to claim 6, characterized in that: The connection blocks (27) are located between two adjacent positioning ring shells (23), and are arranged in plurality along the edge of the corresponding upper mold shell (22) or lower mold shell (21).

8. The small battery module according to claim 6, characterized in that: The lower mold shell (21) or the upper mold shell (22) has a countersunk hole (28) arranged corresponding to the threaded hole, and the bolt hole is arranged through the bottom of the countersunk hole.

9. The small battery module according to claim 1, characterized in that: The lower mold shell (21) and the corresponding positioning ring shell (23) are integrally formed; the upper mold shell (22) and the corresponding positioning ring shell (23) are integrally formed.

10. A small battery pack, characterized in that: It comprises a housing (1) and a small battery module as claimed in any one of claims 1 to 9; the small battery module is arranged in the housing (1).

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