Safe explosion-proof battery shell

Abstract

The utility model discloses a safe explosion-proof battery shell which comprises an outer shell, buffer pieces are arranged at four corners of the bottom end of the outer shell, a fixed frame is arranged at the movable end of each buffer piece, and an inner shell is fixedly mounted in each fixed frame; the buffering piece comprises a spring set connected into the shell, and the spring set keeps upward elastic pressing on the fixing frame. In conclusion, the utility model overcomes the defects in the prior art, is reasonable in design, can buffer the impact on the inner shell so as to protect the inner shell of the battery, and has higher social use value and application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery shell technical field especially relates to a safe explosion -proof battery shell. BACKGROUND

[0002] Battery is a device that converts chemical energy into electric energy, and is a battery designed for rechargeable, which realizes recharge through reversible chemical reaction. The existing energy storage battery cannot be effectively protected during use. During use, the energy storage battery is easily shaken due to changes in the use environment of the machine and the shaking of the machine itself. After a long time of shaking, the energy storage battery is easily damaged and burst, affecting the service life of the energy storage battery. To solve the above problems, a safe explosion -proof battery shell capable of buffering the impact on the inner shell of the battery is provided. SUMMARY

[0003] In order to solve the problems mentioned in the background art, the utility model provides a safe explosion -proof battery shell.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A safe explosion -proof battery shell, comprising a shell, the shell bottom end four corners all are equipped with buffer piece, the movable end of buffer piece is equipped with fixed frame, the fixed frame is fixedly installed with inner shell in, buffer piece includes spring group connected in the shell inside, spring group keeps to the fixed frame upward direction's spring pressure.

[0006] Preferably, the shell is detachably connected with a mounting plate, and the mounting plate is connected with the bottom end of the spring group.

[0007] Preferably, a limiting plate is arranged in the shell, a limiting block is arranged on the side wall of the inner shell, and the limiting block is slidably connected to the limiting plate.

[0008] Preferably, a buffer pad is arranged on the side wall of the limiting plate, and the buffer pad abuts against the limiting block.

[0009] Preferably, an elastic clamping block is arranged on the limiting plate close to the top end, and the elastic clamping block abuts against the limiting block.

[0010] Preferably, a hollow cavity is formed between the inner shell and the shell, and the hollow cavity is filled with insulating liquid.

[0011] Preferably, a safety column is arranged on the shell in an array, the safety column is a hollow structure, a through hole is formed in the inner shell, and the through hole corresponds to the hollow structure of the safety column.

[0012] Preferably, an explosion slot is arranged on the safety column.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、 through the buffer piece and the buffer pad can buffer the inner shell, when the shell is impacted, to reduce the impact that the inner shell receives, can avoid the inner shell damage, prolong the service life of the battery.

[0015] 2、 when the short circuit occurs in the battery, will cause temperature to rise, or the battery is impacted by the greater external force, the safety column will all have the violent deformation, causes the explosion-proof groove to crack, the insulating liquid in the hollow chamber can enter the inner shell, the electrolyte resistance becomes big, thereby prevents the battery fire explosion.

[0016] Summarized above, the utility model overcomes the insufficient of prior art, and the design is reasonable, can buffer the impact that the inner shell receives, thereby protects the battery inner shell, has higher social use value and application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be to the embodiment or prior art description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the internal structure schematic diagram of the shell body of the utility model;

[0020] Figure 3 It is the buffer piece structure schematic diagram of the utility model;

[0021] Figure 4 It is the internal structure schematic diagram of the utility model;

[0022] Figure 5 It is the Figure 2 It is the structure schematic diagram of A place in the utility model;

[0023] Figure 6 It is the safety column structure schematic diagram of the utility model;

[0024] Figure 7 It is the sectional view of the utility model.

[0025] In the figure: shell 1, top cover 2, buffer 11, fixed frame 12, fixed block 111, mounting plate 112, spring group 113, limiting plate 14, buffer pad 141, elastic clamping block 142, inner shell 3, through hole 32, limiting block 31, safety column 4, burst slot 41, hollow cavity 5, insulating liquid 6, liquid injection hole 21. DETAILED DESCRIPTION

[0026] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Embodiment 1

[0028] Reference Figures 1-6 A safe and explosion-proof battery shell, comprising a shell 1, the top end of the shell 1 is provided with a top cover 2, the bottom end of the shell 1 is provided with a buffer 11 at each corner, the movable end of the buffer 11 is provided with a fixed frame 12, and the fixed frame 12 is fixedly installed with an inner shell 3.

[0029] The buffer 11 comprises fixed blocks 111 fixedly connected at the bottom end of the shell 1 at each corner, and a mounting plate 112 is detachably connected to the fixed blocks 111, the top end of the mounting plate 112 is provided with a spring group 113, and the top end of the spring group 113 is fixedly connected to the bottom end of the fixed frame 12.

[0030] Further, the inner side wall of the shell 1 is provided with a limiting plate 14, the limiting plate is L-shaped, the inner side wall of the limiting plate 14 is provided with a buffer pad 141, the side wall of the inner shell 3 is provided with a limiting block 31, and the limiting block 31 abuts against the buffer pad 141.

[0031] Further, the inner side wall of the limiting plate 14 is provided with an elastic clamping block 142 at a position close to the top end, the bottom end of the elastic clamping block 142 abuts against the top end of the limiting block 31, and the inner shell 3 can be limited.

[0032] The inner shell 3 is installed into the fixed frame 12, the inner shell 3 abuts against the lower surface of the elastic clamping block 142, the inner shell 3 can be installed into the fixed frame 12, at this time, the bottom surface of the elastic clamping block 142 abuts against the top end of the limiting block 31, at this time, the inner shell 3 can be fixed on the fixed frame 12, the inner shell 3 can be buffered by the buffer 11 and the buffer pad 141, when the shell 1 is impacted, the impact on the inner shell 3 can be reduced, the inner shell 3 can be prevented from being damaged, and the service life of the battery can be prolonged.

[0033] Embodiment 2

[0034] According to Figures 1-7 As shown in the drawings, the inner shell 3 and the outer shell 1 form a hollow cavity 5, the hollow cavity 5 is filled with insulating liquid 6, the inner shell 3 and the outer shell 1 are provided with the hollow cavity 5, which can avoid the influence of the inner shell 3 by the external low temperature and high temperature, the safety column 4 is arranged on the upper and lower sides of the outer shell 1, the safety column 4 is a hollow structure, the through hole 32 is arranged at both ends of the inner shell 3, and the through hole 32 corresponds to the hollow part of the safety column 4.

[0035] The safety column 4 is a flexible structure and has a certain deformation space, one end of the safety column 4 is fixedly connected with the inner wall of the outer shell 1, the other end of the safety column 4 is fixedly connected with the outer wall of the inner shell 3, and the hollow structure of the safety column 4 is communicated with the inside of the inner shell 3 through the through hole 32. The safety column 4 is provided with a burst slot 41, the burst slot 41 is a isosceles trapezoidal structure in cross section, and the outer diameter of the burst slot 41 gradually increases from the inner side to the outer side of the safety column 4. When the battery is dropped or subjected to a larger external force such as impact, the safety column 4 will be subjected to a severe deformation, the burst slot 41 will be the first to expand and crack under the action of the external force, and the insulating liquid 6 filled in the hollow cavity 5 is released, thereby effectively preventing the battery from catching fire and exploding.

[0036] Further, the top cover 2 is provided with a liquid injection hole 21 for filling the insulating liquid 6 into the hollow cavity 5.

[0037] The insulating liquid 6 is methyl silicone oil. The methyl silicone oil has a very small vapor pressure, a relatively high flash point and ignition point of about 300 degrees Celsius, can be similar to the electrolyte, rapidly increases the resistance of the electrolyte, and greatly reduces the short-circuit current.

[0038] The process of fire and explosion of lithium battery internal short circuit is that the gas generated by the internal short circuit of the battery gradually increases the pressure, the oxygen enters the battery to cause fire and explosion after the shell is broken. In the process of gradually increasing the pressure, the safety column 4 cracks, the hollow cavity 5 is communicated with the inner shell 3 before the shell 1 is broken, the generated gas will expand outward, the air pressure at the through hole 32 will not completely block the electrolyte from entering under the condition that the through hole 32 is large enough, the insulating liquid 6 will mix with the electrolyte solution in the battery, and the resistance of the electrolyte will be rapidly increased.

[0039] Here, the battery is a lithium battery. When the internal short circuit of the battery occurs, the temperature will rise, or the battery will be subjected to a larger external force impact, the safety column 4 will be subjected to a severe deformation, the burst slot 41 will be cracked, the insulating liquid in the hollow cavity 5 will enter the inside of the inner shell 3, the resistance of the electrolyte will be increased, thereby preventing the battery from catching fire and exploding.

[0040] Working principle: install the inner shell 3 to the fixed frame 12, the inner shell 3 is pressed to the lower surface of the elastic clamping block 142, the inner shell 3 can be installed to the fixed frame 12, at this time the bottom surface of the elastic clamping block 142 is in abutment with the top end of the limiting block 31, at this time the inner shell 3 can be fixed on the fixed frame 12, and the inner shell 3 can be buffered by the buffer 11 and the buffer pad 141;

[0041] When the battery is short-circuited, the temperature rises, or the battery is impacted by a large external force, the safety column 4 will deform violently, causing the explosion-proof groove 41 to crack, and the insulating liquid in the hollow cavity 5 will enter the inner shell 3, the resistance of the electrolyte will increase, thereby preventing the battery from catching fire and exploding.

[0042] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0043] In the utility model, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0044] The control mode of the utility model is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of the skilled person in the art, and the power supply also belongs to the common knowledge in the art, and the utility model is mainly used for protecting mechanical devices, so the control mode and circuit connection of the utility model will not be explained in detail.

[0045] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A safe and explosion-proof battery casing, characterized in that: include The outer shell (1) has buffers (11) at the four corners of the bottom end of the outer shell (1). The movable end of the buffer (11) is provided with a fixed frame (12). The inner shell (3) is fixedly installed inside the fixed frame (12). The buffer (11) includes a spring assembly (113) connected inside the housing (1), which maintains an upward spring pressure on the fixed frame (12).

2. The explosion-proof battery casing according to claim 1, characterized in that: The housing (1) has a detachable mounting plate (112) inside, which is connected to the bottom end of the spring assembly (113).

3. The safe and explosion-proof battery casing according to claim 1, characterized in that: The outer shell (1) is provided with a limiting plate (14), and the inner shell (3) is provided with a limiting block (31) on its side wall. The limiting block (31) is slidably connected to the limiting plate (14).

4. The explosion-proof battery casing according to claim 3, characterized in that: The side wall of the limiting plate (14) is provided with a buffer pad (141), and the buffer pad (141) abuts against the limiting block (31).

5. A safe and explosion-proof battery casing according to claim 3, characterized in that: An elastic locking block (142) is provided near the top of the limiting plate (14), and the elastic locking block (142) abuts against the limiting block (31).

6. The explosion-proof battery casing according to claim 1, characterized in that: A hollow cavity (5) is formed between the inner shell (3) and the outer shell (1), and the hollow cavity (5) is filled with insulating liquid (6).

7. The safe and explosion-proof battery casing according to claim 1, characterized in that: The outer shell (1) is provided with a series of safety posts (4), which are hollow structures. The inner shell (3) is provided with a through hole (32), which corresponds to the hollow structure of the safety post (4).

8. A safe and explosion-proof battery casing according to claim 7, characterized in that: The safety post (4) is provided with a bursting groove (41).

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