Protective lithium battery pack for electric bicycle

Abstract

The lithium battery pack comprises an outer frame, side plates are fixed to the front end face and the rear end face of the outer frame, a plurality of heat dissipation openings are formed in the side plate on the front side, and a protective film is fixed to the side, close to the outer frame, of the side plate on the front side. Two protection plates are fixed between the opposite sides of the two inner side walls of the outer frame, a plurality of second springs are fixed to the upper inner wall and the lower inner wall of the outer frame, two ventilation pipes are fixed to the inner bottom wall of the outer frame, two supporting columns are fixed to the inner bottom wall of the outer frame, and the ventilation pipes are fixed to the inner bottom wall of the outer frame. And fans are mounted on the upper end surfaces of the two supporting columns. According to the lithium battery pack with the protection function for the electric bicycle, by arranging a first spring and a second spring, damping of the battery pack is facilitated, damage caused by too large impact force during collision of the battery pack is prevented, and by arranging a fan and a heat dissipation opening, certain heat dissipation of the battery pack is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery pack with protection for electric bicycles. Background Art

[0002] Lithium battery is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become mainstream. Lithium-ion battery electric bicycles are more efficient, safer and more environmentally friendly than traditional lead-acid batteries. Most importantly, lithium batteries are light and durable, making electric bicycles not bulky and more beautiful.

[0003] Chinese Patent Publication No.: (CN 213905506 U) A lithium battery for an electric bicycle with an anti-collision protection structure comprises a lithium battery, an outer shell, a cover plate and an inner shell. The lithium battery comprises an outer shell, the upper end of the outer shell is fixedly connected to the cover plate by bolts, both ends of the cover plate are inlaid with connecting electrodes, the electrodes are electrically connected to the internal components of the lithium battery through wires, corner protection pads are bonded to the outer sides of the outer shell corners, an inner shell is arranged inside the outer shell, and a lithium battery storage structure is arranged in the inner shell. The beneficial effects are: by arranging a double shell and a protective cushion layer, the impact force of the electric bicycle lithium battery can be buffered after being hit, the lithium battery can be effectively protected, and the lithium battery can be prevented from being damaged and ignited after being hit to cause danger, and normal bumps can be prevented from damaging the corners of the outer shell, thereby increasing the protection effect of the outer shell.

[0004] The applicant found through searching that the above patent still has certain technical defects. For example, the above patent buffers the impact force by setting a double shell and a protective cushion layer. This method is too simple and cannot protect the internal lithium battery well. The protection effect is not high and it is not easy to dissipate heat. Therefore, a protected lithium battery pack for electric bicycles is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a protected lithium battery pack for an electric bicycle, which has the advantages of high protection and solves the problems of being too simple, not being able to protect the internal lithium battery well, having low protection effect, and not being easy to dissipate heat.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protected lithium battery pack for an electric bicycle comprises an outer frame, side panels are fixed to both front and rear end surfaces of the outer frame, a plurality of heat dissipation ports are opened inside the front side panel, a protective film is fixed to the side of the front side panel close to the outer frame, two protective plates are fixed between opposite sides of two inner side walls of the outer frame, a plurality of first springs are fixed to the two inner side walls of the outer frame, a battery pack is fixed between opposite sides of the two protective plates, a plurality of second springs are fixed to the upper and lower inner walls of the outer frame, two ventilation pipes are fixed to the inner bottom wall of the outer frame, two support columns are fixed to the inner bottom wall of the outer frame, and fans are installed on the upper end surfaces of the two support columns.

[0007] Furthermore, the number of the heat dissipation openings is twelve, and the shape of the heat dissipation openings is strip-shaped.

[0008] Furthermore, the material of the protective film is breathable, and the protective film and the front side panel are connected by bonding.

[0009] Further, the number of the first springs and the second springs is three.

[0010] Furthermore, one end of the first spring on the left and right sides away from the outer frame is respectively fixed to the left and right sides of the battery pack.

[0011] Furthermore, one end of the second spring on the front and rear sides away from the outer frame is respectively fixed to the front and rear sides of the battery pack.

[0012] Furthermore, two circular holes having the same diameter as the two ventilation pipes are provided inside the protective plate at the bottom.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The protected lithium battery pack for electric bicycles is convenient for reducing shock on the battery pack by arranging the first spring and the second spring to prevent the battery pack from being damaged due to excessive impact force during collision, and is convenient for dissipating heat to a certain extent on the battery pack by arranging the fan and the heat dissipation port. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cutaway structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 A is an enlarged schematic diagram of the structure.

[0018] In the figure: 1. outer frame; 2. side panel; 3. protective film; 4. second spring; 5. ventilation pipe; 6. support column; 7. fan; 8. battery pack; 9. first spring; 10. protective plate; 11. heat dissipation port. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0020] See also Figure 1-3 A protected lithium battery pack for an electric bicycle in this embodiment includes an outer frame 1, side panels 2 are fixed to both front and rear end surfaces of the outer frame 1, a plurality of heat dissipation ports 11 are opened inside the front side panel 2, a protective film 3 is fixed to the side of the front side panel 2 close to the outer frame 1, two protective plates 10 are fixed between the opposite sides of the two inner side walls of the outer frame 1, a plurality of first springs 9 are fixed to the two inner side walls of the outer frame 1, a battery pack 8 is fixed between the opposite sides of the two protective plates 10, a plurality of second springs 4 are fixed to the upper and lower inner walls of the outer frame 1, two ventilation pipes 5 are fixed to the inner bottom wall of the outer frame 1, two support columns 6 are fixed to the inner bottom wall of the outer frame 1, and fans 7 are installed on the upper end surfaces of the two support columns 6.

[0021] The material of the protective film 3 is breathable, and the connection between the protective film 3 and the front side panel 2 is bonding. The number of the first springs 9 and the second springs 4 are three. The ends of the left and right first springs 9 away from the outer frame 1 are respectively fixed to the left and right sides of the battery pack 8, and the ends of the front and rear second springs 4 away from the outer frame 1 are respectively fixed to the front and rear sides of the battery pack 8. Two circular holes with the same diameter as the two ventilation pipes 5 are opened inside the bottom protective plate 10.

[0022] The working principle of the above embodiment is:

[0023] When impact vibration occurs, the battery pack 8 is caused to shake according to the elastic force of the first spring 9 and the second spring 4 through the provision of the first spring 9 and the second spring 4, so that the frequency of shaking of the battery pack 8 becomes smaller, thereby achieving a certain degree of shock absorption for the battery pack 8. When the battery pack 8 is used for too long, it is easy to cause the temperature of the internal parts to rise, and the battery pack 8 needs to be cooled. Since a number of heat dissipation ports 11 are provided and the side panels 2 and the outer frame 1 are in a flow state, the air at the heat dissipation ports 11 is converted into wind force through the operation of the fan 7, and blown from the ventilation pipe 5 to the battery pack 8, thereby achieving a certain degree of heat dissipation for the battery pack 8.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery pack for an electric bicycle with protection, comprising an outer frame (1), characterized in that: Side panels (2) are fixed to both front and rear end surfaces of the outer frame (1); a plurality of heat dissipation openings (11) are provided inside the front side panel (2); a protective film (3) is fixed to the side of the front side panel (2) close to the outer frame (1); two protective panels (10) are fixed between the two opposite sides of the inner side walls of the outer frame (1); a plurality of first springs (9) are fixed to the two inner side walls of the outer frame (1); a battery pack (8) is fixed between the opposite sides of the two protective panels (10); a plurality of second springs (4) are fixed to the upper and lower inner walls of the outer frame (1); two ventilation pipes (5) are fixed to the inner bottom wall of the outer frame (1); two support columns (6) are fixed to the inner bottom wall of the outer frame (1); and fans (7) are installed on the upper end surfaces of the two support columns (6).

2. A lithium battery pack for electric bicycle with protection according to claim 1, characterized in that: The number of the heat dissipation openings (11) is twelve, and the shape of the heat dissipation openings (11) is strip-shaped.

3. A lithium battery pack for electric bicycle with protection according to claim 1, characterized in that: The material of the protective film (3) is breathable, and the protective film (3) and the front side plate (2) are connected by bonding.

4. A lithium battery pack for electric bicycle with protection according to claim 1, characterized in that: The number of the plurality of first springs (9) and second springs (4) is three.

5. A lithium battery pack for electric bicycle with protection according to claim 1, characterized in that: One end of the first spring (9) on the left and right sides away from the outer frame (1) is respectively fixed to the left and right sides of the battery pack (8).

6. A lithium battery pack for electric bicycle with protection according to claim 1, characterized in that: One end of the second spring (4) at the front and rear sides away from the outer frame (1) is respectively fixed to the front and rear sides of the battery pack (8).

7. A lithium battery pack for electric bicycle with protection according to claim 1, characterized in that: Two circular holes having the same diameter as the two ventilation pipes (5) are provided inside the protective plate (10) at the bottom.

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