Explosion-proof lithium battery

Abstract

The utility model provides an explosion-proof lithium battery which comprises a battery main bin, a component auxiliary bin, a battery module and a plurality of components, a battery fixing space used for fixing the battery module is formed in the battery main bin, a first exhaust valve is arranged on the side wall of the battery main bin, and a second exhaust valve is arranged on the side wall of the battery main bin. A component fixing space used for fixing the component is formed in the component auxiliary bin, the component auxiliary bin is fixed to the top of the battery main bin, a notch communicated with the component fixing space is formed in the top of the battery main bin, and the component is electrically connected with the battery module. A second exhaust valve is arranged on the side wall of the component auxiliary bin. When the internal air pressure is too large, the first exhaust valve can exhaust air to the outside, the component fixing space in the component auxiliary bin serves as a buffer space, and part of air enters the component auxiliary bin through the notch and can be exhausted to the outside through the second exhaust valve, so that the air pressure can be reduced, and explosion is avoided.

Description

Technical Field

[0001] The utility model relates to the field of energy storage devices, in particular to an explosion-proof lithium battery. Background Art

[0002] When the power battery reaches its expected service life, it will be recycled and used in a cascaded manner. The battery modules that meet the requirements for reuse inside will be reorganized to form a secondary power battery. Therefore, the batteries in the power battery formed by cascaded utilization may come from different battery packs, and there are differences in manufacturing processes, materials, usage environments, wiring methods, etc. It is inevitable that there are inconsistencies in capacity, terminal voltage, and internal resistance between individual batteries, and the battery uniformity is poor, which will lead to overcharging or over-discharging of some battery monomers.

[0003] However, mining vehicles generally operate in mines or shafts. The roads in mines are rough and dusty; the environment in shafts is humid and the content of harmful gases is high; in the extreme environment of special mine operations, there are extremely high requirements for the explosion-proof, shock-proof, and heat dissipation functions of lithium battery packs. However, traditional lithium battery packs pay more attention to problems such as the capacitance and voltage of the battery pack, and cannot achieve effective explosion-proof and shock-proof functions. In special mine operations, traditional lithium batteries are particularly vulnerable to the impact of shock waves and vibrations, which may cause the batteries to malfunction and even explode. Summary of the Utility Model

[0004] In view of this, it is necessary to provide an explosion-proof lithium battery that can be safely used in extreme environments.

[0005] An explosion-proof lithium battery includes:

[0006] A battery main compartment, a component secondary compartment, a battery module, and several components. A battery fixing space for fixing the battery module is formed inside the battery main compartment. A first exhaust valve is provided on the side wall of the battery main compartment. A component fixing space for fixing the components is formed inside the component secondary compartment. The component secondary compartment is fixed on the top of the battery main compartment. A notch communicating with the component fixing space is provided on the top of the battery main compartment. The components are electrically connected to the battery module through the notch. A second exhaust valve is provided on the side wall of the component secondary compartment.

[0007] Optionally, the battery main compartment includes a main compartment body and an upper cover. The upper cover is sealed with the top of the main compartment body to form a battery fixing space inside. A fixing frame is provided inside the main compartment body. The battery module is fixed on the fixing frame. A notch communicating with the component fixing space is provided on the upper cover.

[0008] Optionally, the fixing frame includes a pair of fixing side frames and several pairs of horizontal cross frames. A pair of the fixing side frames are respectively fixed to opposite side walls within the main bin body. The several pairs of horizontal cross frames are disposed between the pair of fixing side frames. Two ends of each horizontal cross frame are respectively fixed to the pair of fixing side frames. A space for fixing the battery module is formed between adjacent two pairs of the horizontal cross frames.

[0009] Optionally, the fixing frame further includes several pairs of supporting bottom plates, and the supporting bottom plates are fixed on the horizontal cross frames.

[0010] Optionally, several reinforcing pipe fittings are fixed to the bottom of the supporting bottom plates for strengthening the strength of the supporting bottom plates.

[0011] Optionally, an external fixing frame is provided on an outer side wall of the main bin body. The external fixing frame includes a pair of triangular reinforcing plates and a reinforcing bottom plate. One side of each of the pair of triangular reinforcing plates is oppositely fixed to the outer side wall of the main bin body. Two ends of the reinforcing bottom plate are respectively fixed to the other side of the pair of triangular reinforcing plates. A plurality of fixing holes are formed in both the triangular reinforcing plates and the reinforcing bottom plate.

[0012] Optionally, the upper cover is fixed to the top of the main bin body by bolts. A plurality of connection holes are formed in the upper cover, and upper cover lifting rings are fixed in the connection holes.

[0013] Optionally, the first exhaust valve includes an inner ring body and an outer cover. An exhaust hole is formed in an outer wall of the main bin body. The inner ring body is fixed on the exhaust hole. An explosion-proof film is fixed at a position corresponding to the exhaust hole on the inner ring body. The outer cover covers the inner ring body, and a plurality of ventilation holes are formed in the outer cover.

[0014] Optionally, the first exhaust valve further includes an outer protection ring. The outer protection ring is disposed around the outer cover and fixed to the outer side wall of the main bin body. The outer protection ring shields the ventilation holes.

[0015] Optionally, the component sub-bin includes a sub-bin main body and a sub-bin upper cover. The sub-bin main body is a cylinder without covers at upper and lower ends and is fixed to the upper cover. The sub-bin upper cover is fixed to the top of the sub-bin main body. A plurality of lifting holes are formed in the sub-bin upper cover, and sub-bin lifting rings are fixed in the lifting holes.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The present utility model provides an explosion-proof lithium battery, which includes a battery main compartment, a component sub-compartment, a battery module, and a number of components. A battery fixing space for fixing the battery module is formed in the battery main compartment. A first exhaust valve is provided on the side wall of the battery main compartment. A component fixing space for fixing the components is formed in the component sub-compartment. The component sub-compartment is fixed on the top of the battery main compartment. A notch communicating with the component fixing space is provided on the top of the battery main compartment. The components are electrically connected to the battery module. A second exhaust valve is provided on the side wall of the component sub-compartment. When the internal air pressure is too high, the first exhaust valve can exhaust to the outside. And the component fixing space in the component sub-compartment serves as a buffer space. Part of the gas enters the component sub-compartment through the notch and can exhaust to the outside through the second exhaust valve, thereby reducing the air pressure and avoiding explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of the explosion-proof lithium battery of the present utility model;

[0020] Figure 2 is a schematic cross-sectional diagram of the explosion-proof lithium battery of the present utility model;

[0021] Figure 3 is Figure 1 a schematic cross-sectional diagram of the first exhaust valve in

[0022] In the figure: 1 - battery main compartment, 11 - main compartment body, 111 - fixing frame, 111a - fixing side frame, 111b - horizontal cross frame, 111c - supporting bottom plate, 111d - strengthening pipe fitting, 12 - upper cover, 121 - upper cover lifting ring, 13 - first exhaust valve, 131 - inner ring body, 132 - outer cover, 133 - explosion-proof film, 134 - outer protection ring, 14 - battery fixing space, 15 - outer fixing frame, 151 - triangular strengthening plate, 152 - strengthening bottom plate, 2 - component sub-compartment, 21 - sub-compartment main body, 22 - sub-compartment upper cover, 221 - sub-compartment lifting ring, 3 - battery module, 4 - components. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will specifically describe the preferred embodiments of the present utility model with reference to the drawings. Among them, the drawings form a part of this application and are used together with the embodiments of the present utility model to explain the principle of the present utility model, and are not used to limit the scope of the present utility model.

[0024] As Figures 1 - 3 shown, an embodiment of the present utility model provides an explosion-proof lithium battery, which includes:

[0025] A battery main chamber 1, a component sub-chamber 2, a battery module 3, and a plurality of components 4. A battery fixing space for fixing the battery module 3 is formed in the battery main chamber 1. A first exhaust valve 13 is provided on the side wall of the battery main chamber 1. A component fixing space for fixing the components 4 is formed in the component sub-chamber 2. The component sub-chamber 2 is fixed on the top of the battery main chamber 1. A notch communicating with the component fixing space is provided on the top of the battery main chamber 1. The components 4 are electrically connected to the battery module 3 through the notch. A second exhaust valve is provided on the side wall of the component sub-chamber 2.

[0026] The present utility model provides an explosion-proof lithium battery, which includes a battery main chamber 1, a component sub-chamber 2, a battery module 3, and a plurality of components 4. A battery fixing space for fixing the battery module 3 is formed in the battery main chamber 1. A first exhaust valve is provided on the side wall of the battery main chamber 1. A component fixing space for fixing the components 4 is formed in the component sub-chamber 2. The component sub-chamber 2 is fixed on the top of the battery main chamber 1. A notch communicating with the component fixing space is provided on the top of the battery main chamber 1. The components 4 are electrically connected to the battery module 3. A second exhaust valve is provided on the side wall of the component sub-chamber 2. When the internal air pressure is too high, the first exhaust valve can exhaust to the outside, and the component fixing space in the component sub-chamber 2 serves as a buffer space. Part of the gas enters the component sub-chamber 2 through the notch and can exhaust to the outside through the second exhaust valve, thereby reducing the air pressure and avoiding explosion.

[0027] Specifically, the battery main chamber 1 includes a main chamber body 11 and an upper cover 12. The upper cover 12 is sealed with the top of the main chamber body 11 to form a battery fixing space 14 inside. A fixing frame 111 is provided in the main chamber body 11. The battery module 3 is fixed on the fixing frame 111. A notch communicating with the component fixing space is provided on the upper cover 12.

[0028] Furthermore, the main chamber body 11 and the upper cover 12 are steel plates with a thickness of 10 - 30 mm. The specific thickness of the steel plate is selected according to the internal gas production pressure to meet the requirement that the explosion-proof cavity for placing the battery should be able to withstand a static pressure test of not less than 1.5 MPa.

[0029] Further, the fixing frame 111 includes a pair of fixing side frames 111a and several pairs of horizontal cross frames 111b. The pair of fixing side frames 111a are respectively fixed to a pair of opposite side walls inside the main bin body 11. The several pairs of horizontal cross frames 111b are arranged between the pair of fixing side frames 111a. The two ends of the horizontal cross frame 111b are respectively fixed to the pair of fixing side frames 111a. A space for fixing the battery module 3 is formed between adjacent pairs of the horizontal cross frames 111b.

[0030] Further, the fixing frame 111 further includes several pairs of supporting bottom plates 111c. The supporting bottom plates 111c are fixed on the horizontal cross frames 111b and are used for supporting the battery module 3.

[0031] Further, several reinforcing pipe fittings 111d are fixed to the bottom of the supporting bottom plate 111c to enhance the strength of the supporting bottom plate 111c and prevent the supporting bottom plate 111c from being bent under stress.

[0032] Further, an external fixing frame 15 is provided on the outer side wall of the main bin body 11. The external fixing frame 15 includes a pair of triangular reinforcing plates 151 and a reinforcing bottom plate 152. One side of the pair of triangular reinforcing plates 151 is relatively fixed to the outer side wall of the main bin body 11. The two ends of the reinforcing bottom plate 152 are respectively fixed to the other side of the pair of triangular reinforcing plates 151. A number of fixing holes are provided on both the triangular reinforcing plate 151 and the reinforcing bottom plate 152, which is convenient for fixing the explosion-proof lithium battery.

[0033] Specifically, the upper cover 12 is fixed to the top of the main bin body 11 by bolts. A number of connection holes are provided on the upper cover 12, and upper cover lifting rings 121 are fixed in the connection holes, which is convenient for hoisting.

[0034] Specifically, the first exhaust valve 13 includes an inner ring body 131 and an outer cover 132. An exhaust hole is provided on the outer wall of the main bin body 11. The inner ring body 131 is fixed on the exhaust hole. An explosion-proof film 133 is fixed at a position corresponding to the exhaust hole on the inner ring body 131. The outer cover 132 covers the inner ring body 131, and a number of ventilation holes are provided on the outer cover 132. And the ventilation holes are arranged in a staggered manner with the explosion-proof film 133.

[0035] Further, the first exhaust valve 13 further includes an outer protection ring 134. The outer protection ring 134 surrounds the outer cover 132 and is fixed to the outer side wall of the main bin body 11. The outer protection ring 134 blocks the ventilation holes to prevent external substances from entering the first exhaust valve 13 through the ventilation holes and damaging the explosion-proof film 133.

[0036] Specifically, the component secondary bin 2 is fixed on the upper cover 12. The component secondary bin 2 includes a secondary bin main body 21 and a secondary bin upper cover 22. The secondary bin main body 21 is a cylinder without covers at both upper and lower ends and is fixed on the upper cover 12. The secondary bin upper cover 22 is fixed to the top of the secondary bin main body 21. A number of lifting holes are provided on the secondary bin upper cover 22, and secondary bin lifting rings 221 are fixed in the lifting holes, facilitating lifting.

[0037] The structure of the second exhaust valve is the same as that of the first exhaust valve 13, so it will not be described herein again.

[0038] The beneficial effects of the present utility model are as follows:

[0039] The present utility model provides an explosion-proof lithium battery, which includes a battery main bin, a component secondary bin, a battery module, and a number of components. A battery fixing space for fixing the battery module is formed in the battery main bin. A first exhaust valve is provided on the side wall of the battery main bin. A component fixing space for fixing the components is formed in the component secondary bin. The component secondary bin is fixed on the top of the battery main bin. A notch communicating with the component fixing space is provided on the top of the battery main bin. The components are electrically connected to the battery module. A second exhaust valve is provided on the side wall of the component secondary bin. When the internal air pressure is too high, the first exhaust valve can exhaust to the outside, and the component fixing space in the component secondary bin serves as a buffer space. Part of the gas enters the component secondary bin through the notch and can exhaust to the outside through the second exhaust valve, thereby reducing the air pressure and avoiding explosion.

[0040] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An explosion-proof lithium battery, characterized in that: include: A battery main compartment, a component sub-compartment, a battery module and several components, a battery fixing space for fixing the battery module is formed in the battery main compartment, a first exhaust valve is provided on the side wall of the battery main compartment, a component fixing space for fixing the components is formed in the component sub-compartment, the component sub-compartment is fixed to the top of the battery main compartment, a notch communicating with the component fixing space is provided on the top of the battery main compartment, the components and the battery module are electrically connected through the notch, and a second exhaust valve is provided on the side wall of the component sub-compartment.

2. The explosion-proof lithium battery according to claim 1, characterized in that: The battery main compartment includes a main compartment body and an upper cover, wherein the upper cover is sealed with the top of the main compartment body to form a battery fixing space inside, a fixing frame is provided within the main compartment body, the battery module is fixed on the fixing frame, and a notch is provided on the upper cover to communicate with the component fixing space.

3. The explosion-proof lithium battery according to claim 2, characterized in that: The fixed frame includes a pair of fixed side frames and several pairs of horizontal cross frames. The pair of fixed side frames are respectively fixed to a pair of opposite side walls in the main compartment body, and several pairs of horizontal cross frames are arranged between the pair of fixed side frames. Both ends of the horizontal cross frames are respectively fixed to the fixed side frames, and a space for fixing the battery module is formed between two adjacent pairs of horizontal cross frames.

4. The explosion-proof lithium battery according to claim 3, characterized in that: The fixing frame also includes a plurality of pairs of supporting base plates, and the supporting base plates are fixed on the horizontal cross frame.

5. The explosion-proof lithium battery according to claim 4, characterized in that: A plurality of reinforcing pipes are fixed to the bottom of the supporting base plate to enhance the strength of the supporting base plate.

6. The explosion-proof lithium battery according to claim 2, characterized in that: An external fixing frame is provided on the outer wall of the main warehouse body, and the external fixing frame includes a pair of triangular reinforcement plates and a reinforcement bottom plate. One side edges of the pair of triangular reinforcement plates are relatively fixed to the outer wall of the main warehouse body, and the two ends of the reinforcement bottom plate are respectively fixed to the other side edges of the pair of triangular reinforcement plates. A number of fixing holes are opened on the triangular reinforcement plates and the reinforcement bottom plate.

7. The explosion-proof lithium battery according to claim 2, characterized in that: The upper cover is fixed to the top of the main warehouse body by bolts. A plurality of connecting holes are opened on the upper cover, and upper cover lifting rings are fixed in the connecting holes.

8. The explosion-proof lithium battery according to claim 2, characterized in that: The first exhaust valve includes an inner ring body and an outer cover. An exhaust hole is opened on the outer wall of the main chamber body. The inner ring body is fixed on the exhaust hole. An explosion-proof film is fixed at a position of the inner ring body corresponding to the exhaust hole. The outer cover is arranged on the inner ring body, and a plurality of air holes are opened on the outer cover.

9. The explosion-proof lithium battery according to claim 8, characterized in that: The first exhaust valve also includes an outer protective ring, which is arranged around the outer cover and fixed to the outer side wall of the main chamber body, and the outer protective ring covers the air vent.

10. The explosion-proof lithium battery according to claim 2, characterized in that: The component sub-bin includes a sub-bin main body and a sub-bin upper cover. The sub-bin main body is a cylinder without covers at both ends and is fixed on the upper cover. The sub-bin upper cover is fixed to the top of the sub-bin main body. A plurality of lifting holes are opened on the sub-bin upper cover, and sub-bin lifting rings are fixed in the lifting holes.

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