Fixing device for lithium battery in battery module

Abstract

The utility model discloses a fixing device for a lithium battery in a battery module, which comprises a box body and a box cover, two rotating shafts are rotatably arranged between the left inner wall and the right inner wall of the box body, the two rotating shafts are respectively close to the front inner wall and the rear inner wall of the box body, the two rotating shafts are in front-back symmetry about the central axis of the box body, and brackets are fixedly arranged on the two rotating shafts; a rubber compression roller is rotatably installed on the support, eight limiting grooves are formed in a bottom plate of an inner cavity of the box body at equal intervals, nine limiting rods are installed at the positions, close to a box opening, between the front inner wall and the rear inner wall of the box body at equal intervals, and two limiting frames are installed at the bottom of the box cover and are in front-back symmetry about the central axis of the box cover; according to the fixing device for the lithium batteries in the battery module, when the box cover covers the box body, the box cover can press the sliding plate downwards, and then the rotating shaft is driven to rotate through meshing of the gear and the rack, so that the lithium batteries in the box body are clamped by the two rubber compression rollers, the lithium batteries are fixed in the box body, and collision between the lithium batteries is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a fixing device for a lithium battery in a battery module. Background Art

[0002] A lithium battery is a battery that uses lithium metal or lithium alloy as the anode material and a non-aqueous electrolyte solution, while a lithium battery module is a battery pack composed of multiple lithium battery cells connected in series and installed in a protective shell. In existing lithium battery modules, the lithium battery cells are fixed in a protective shell with clamps, and multiple lithium battery cells are directly stacked together. The process of tightening the clamps is cumbersome, and the lithium battery cells are prone to shaking in the shell, and collisions are prone to occur between two lithium battery cells, causing damage to the lithium battery cells.

[0003] To this end, we design a fixing device for lithium batteries in a battery module. Utility Model Content

[0004] The purpose of the utility model is to provide a fixing device for lithium batteries in a battery module to solve the problems raised in the background technology in view of the shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixing device for a lithium battery in a battery module, comprising a box body and a box cover, two rotating shafts are rotatably installed between the left and right inner walls of the box body, the two rotating shafts are respectively close to the front and rear inner walls of the box body, and the two rotating shafts are symmetrical front and back about the central axis of the box body, brackets are fixedly installed on the two rotating shafts, and a rubber pressure roller is rotatably installed on the brackets, eight limiting grooves are evenly spaced on the inner cavity bottom plate of the box body, nine limiting rods are evenly spaced between the front and rear inner walls of the box body and near the box opening, and two limiting frames are installed at the bottom of the box cover, and the two limiting frames are symmetrical front and back about the central axis of the box cover;

[0006] A slide plate is vertically slidably installed on the left inner wall of the box body, the slide plate is located between the two rotating shafts, gears are installed on the two rotating shafts, racks are installed on both sides of the slide plate, and the two racks are respectively meshed with the two gears, a slide bar is installed at the bottom of the slide plate, a fixed plate is fixedly installed on the left inner wall of the box body, a sliding hole is provided on the fixed plate, and the slide bar passes through the sliding hole on the fixed plate, a spring is sleeved on the slide bar, and the spring is pressed between the slide plate and the fixed plate.

[0007] Preferably, two rubber pads are installed in each of the eight limiting grooves, and the two rubber pads in each limiting groove are symmetrical front and back about the central axis of the limiting groove, and the eight limiting grooves are located as a whole at the center of the inner cavity bottom plate of the box body.

[0008] Preferably, the left-right thickness of the nine limiting rods is equal to the distance between every two adjacent limiting grooves, and the distance between every two adjacent limiting rods is equal to the left-right width of the limiting groove.

[0009] Preferably, the two limiting frames are U-shaped, both ends of the limiting frames are fixed to the bottom of the box cover, and a rubber sheet is fixedly adhered to the bottom of the limiting frames.

[0010] Preferably, the top of the slide plate is higher than the box opening of the box body.

[0011] Compared with the prior art, the utility model provides a fixing device for lithium batteries in a battery module, which has the following beneficial effects:

[0012] The fixing device of the lithium battery in the battery module can limit the horizontal movement of the lithium battery in the box body by setting a limit groove and a limit rod, and then press the lithium battery down by the limit frame at the bottom of the box cover, so as to limit the vertical movement of the lithium battery in the box body. When the box cover is covered on the box body, the box cover will press down the slide plate, and then drive the rotating shaft to rotate through the engagement of the gear and the rack, so that the two rubber pressure rollers clamp the lithium battery in the box body, thereby fixing the lithium battery in the box body to avoid collision between the lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the box of the utility model;

[0015] Figure 3 This is a side view of the internal structure of the box of the utility model;

[0016] Figure 4 This is a schematic diagram of the box cover structure of the utility model;

[0017] Figure 5 This is a schematic diagram of the internal structure of the box after the lithium battery is placed in the utility model;

[0018] Figure 6 This is a schematic diagram of the internal structure of the box body after the box body is covered.

[0019] Figure numerals: 1. box body; 2. box cover; 3. rotating shaft; 4. bracket; 5. rubber pressure roller; 6. slide plate; 7. fixing plate; 8. slide bar; 9. spring; 10. gear; 11. rack; 12. limit groove; 13. limit rod; 14. rubber pad; 15. limit frame; 16. rubber sheet; 17. lithium battery. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-Figure 6 In this embodiment: a fixing device for a lithium battery in a battery module comprises a box body 1 and a box cover 2. After the box cover 2 is covered on the box body 1, the box body 1 and the box cover 2 can be fixed by screws. Two rotating shafts 3 are rotatably installed between the left and right inner walls of the box body 1. The two rotating shafts 3 are respectively close to the front and rear inner walls of the box body 1, and the two rotating shafts 3 are symmetrical front and back with the central axis of the box body 1. Brackets 4 are fixedly installed on the two rotating shafts 3, and a rubber pressure roller 5 is rotatably installed on the bracket 4. Eight limiting grooves 12 are evenly spaced on the bottom plate of the inner cavity of the box body 1. The left and right widths of the limiting grooves 12 are equal to the left and right widths of the lithium battery 17, and the front and rear widths of the limiting grooves 12 are equal to the front and rear widths of the lithium battery 17. The eight limiting grooves 12 are installed There are two rubber pads 14, and the two rubber pads 14 in each limiting groove 12 are symmetrical front and back about the central axis of the limiting groove 12. The eight limiting grooves 12 are located as a whole at the center of the inner cavity bottom plate of the box body 1. Nine limiting rods 13 are installed at equal intervals between the front and rear inner walls of the box body 1 and near the box opening. The left and right thicknesses of the nine limiting rods 13 are equal to the spacing between every two adjacent limiting grooves 12, and the spacing between every two adjacent limiting rods 13 is equal to the left and right widths of the limiting groove 12. When the lithium battery 17 is placed in the limiting groove 12, the limiting rod 13 is just located on the left and right sides of the lithium battery 17. By setting the limiting groove 12 and the limiting rod 13 in cooperation, the horizontal movement of the lithium battery 17 in the box body 1 can be limited. For example Figure 4 Two limit frames 15 are installed at the bottom of the box cover 2. The two limit frames are symmetrical with respect to the central axis of the box cover 2. The two limit frames 15 are U-shaped. Both ends of the limit frames 15 are fixed to the bottom of the box cover 2. A rubber sheet 16 is fixedly attached to the bottom of the limit frame 15. The distance from the limit frame 15 to the rubber pad 14 is equal to the upper and lower heights of the lithium battery 17. The limit frame 15 at the bottom of the box cover 2 presses down the lithium battery 17, so that the vertical movement of the lithium battery 17 in the box body 1 can be limited;

[0022] A slide plate 6 is vertically slidably mounted on the left inner wall of the box body 1. The slide plate 6 is located between the two rotating shafts 3. Gears 10 are mounted on the two rotating shafts 3. Racks 11 are mounted on both sides of the slide plate 6. The two racks 11 are respectively meshed with the two gears 10. The up and down sliding of the slide plate 6 can drive the rotating shafts 3 on both sides to rotate. A slide bar 8 is mounted at the bottom of the slide plate 6. A fixed plate 7 is fixedly mounted on the left inner wall of the box body 1. The fixed plate 7 is provided with a sliding hole, and the slide bar 8 passes through the fixed plate 7. The slide hole is provided on the slide bar 8, and the spring 9 is arranged between the slide plate 6 and the fixed plate 7. In the normal state, the spring 9 pushes up the slide plate 6, and the top of the slide plate 6 will be higher than the box opening of the box body 1. When the box cover 2 is covered on the box body 1, the box cover 2 will press down the slide plate 6, and then the engagement of the gear 10 and the rack 11 will control the rotating shafts 3 on both sides to rotate inward at the same time, thereby driving the rubber pressure rollers 5 on the rotating shafts 3 on both sides to rotate inward and clamp the lithium battery 17 in the box body 1, so as to achieve the effect of fixing the lithium battery 17.

[0023] The working principle and use process of the utility model are as follows: when the fixing device of the lithium battery in the battery module is in use, the lithium battery 17 is first placed in the limiting groove 12. The limiting groove 12 cooperates with the limiting rod 13 to limit the horizontal movement of the lithium battery 17 in the box body 1. Then the box cover 2 is covered on the box body 1. The limiting frame 15 at the bottom of the box cover 2 presses down the lithium battery 17, thereby limiting the vertical movement of the lithium battery 17 in the box body 1. When the box cover 2 is covered on the box body 1, the box cover 2 presses down the slide plate 6. During the downward movement of the slide plate 6, the two rotating shafts 3 are driven to rotate inward at the same time through the engagement of the gear 10 and the rack 11. The rotation of the two rotating shafts 3 drives the two rubber pressure rollers 5 to rotate inward. The rubber pressure rollers 5 clamp the lithium battery 17 in the box body 1, thereby fixing the lithium battery 17 in the box body 1.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for fixing a lithium battery in a battery module, comprising a box body (1) and a box cover (2), characterized in that: Two rotating shafts (3) are rotatably mounted between the left and right inner walls of the box body (1), the two rotating shafts (3) are respectively close to the front and rear inner walls of the box body (1), and the two rotating shafts (3) are symmetrical front and back about the central axis of the box body (1), brackets (4) are fixedly mounted on the two rotating shafts (3), and a rubber pressure roller (5) is rotatably mounted on the brackets (4), eight limiting grooves (12) are evenly spaced on the inner cavity bottom plate of the box body (1), nine limiting rods (13) are evenly spaced between the front and rear inner walls of the box body (1) and near the box opening, and two limiting frames (15) are mounted on the bottom of the box cover (2), and the two limiting frames are symmetrical front and back about the central axis of the box cover (2); A slide plate (6) is slidably mounted on the left inner wall of the box body (1) in a vertical direction. The slide plate (6) is located between the two rotating shafts (3). Gears (10) are mounted on the two rotating shafts (3). Racks (11) are mounted on both sides of the slide plate (6). The two racks (11) are respectively meshed with the two gears (10). A slide bar (8) is mounted on the bottom of the slide plate (6). A fixed plate (7) is fixedly mounted on the left inner wall of the box body (1). The fixed plate (7) is provided with a slide hole. The slide bar (8) passes through the slide hole on the fixed plate (7). A spring (9) is sleeved on the slide bar (8). The spring (9) is pressed between the slide plate (6) and the fixed plate (7).

2. The device for fixing a lithium battery in a battery module according to claim 1, characterized in that: Two rubber pads (14) are installed in each of the eight limiting grooves (12), and the two rubber pads (14) in each limiting groove (12) are symmetrical in front and back with respect to the central axis of the limiting groove (12), and the eight limiting grooves (12) are located as a whole at the center of the inner cavity bottom plate of the box body (1).

3. The device for fixing a lithium battery in a battery module according to claim 1, characterized in that: The left and right thicknesses of the nine limiting rods (13) are equal to the distance between each two adjacent limiting grooves (12), and the distance between each two adjacent limiting rods (13) is equal to the left and right width of the limiting groove (12). Spend.

4. The device for fixing a lithium battery in a battery module according to claim 1, characterized in that: The two limiting frames (15) are U-shaped, and both ends of the limiting frames (15) are fixed to the bottom of the box cover (2), and a rubber sheet (16) is fixedly adhered to the bottom of the limiting frames (15).

5. The device for fixing a lithium battery in a battery module according to claim 1, characterized in that: The top of the slide plate (6) is higher than the box opening of the box body (1).

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