Lithium ion battery box external detection system with automatic ventilation function

Abstract

The invention discloses a lithium ion battery box external detection system with an automatic ventilation function. The lithium ion battery box external detection system comprises a lithium ion battery box; the detection device is detachably mounted in the lithium ion battery box in an embedded manner and comprises an air inlet hole, an air outlet hole and an adjusting assembly; a composite sensor monitoring circuit board; through the arrangement of the air inlet hole, the air outlet hole, the rotating piece, the composite sensor monitoring circuit board and the adjusting assembly, the device can carry out online detection on fire characteristic changes caused by possible thermal runaway of a battery in the box body, generates an alarm and transmits the alarm to the outside to carry out early alarm, and meanwhile, the device can give an alarm when no fire occurs. And normal ventilation action is performed, so that an effective detection state is facilitated, and the problem that excessive gas in a traditional battery box is accumulated for a long time and cannot be quickly discharged only through a ventilation valve is solved.

Description

Technical Field

[0001] The invention specifically relates to a lithium ion battery box external detection system with an automatic ventilation function. Background Art

[0002] The battery box is a basic component of the energy storage system, also commonly known as a battery management box or battery box. It is a device used to store, protect and manage lithium-ion batteries. The battery box is generally equipped with a ventilation valve, which can discharge gas or dissipate heat in time during battery use to avoid gas accumulation.

[0003] The existing ventilation valve installed on the outside of the battery box needs a pressure of no less than 0.1Mpa to open. The generation of this pressure requires the internal gas to accumulate to a certain level to generate internal pressure, which can drive the ventilation valve to open, affecting rapid ventilation. In addition, due to the uneven battery box process and manufacturing level, the internal gas of the battery box, such as carbon monoxide, VOC hydrogen and other typical fire characteristic gases, accumulates for a long time and exceeds the gas alarm value, resulting in the failure of the detection device. Once powered on, the initial detection value will exceed the alarm value, affecting the normal fire alarm effect. For this reason, we propose an external detection system for lithium-ion battery boxes with automatic ventilation function. Summary of the invention

[0004] The object of the present invention is to provide a lithium-ion battery box external detection system with an automatic ventilation function to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a lithium-ion battery box external detection system with automatic ventilation function, comprising:

[0006] Lithium-ion battery box;

[0007] A detection device detachably embedded in the lithium-ion battery box, the detection device comprising an air inlet, an air outlet and an adjustment component, the air outlet and the air inlet being symmetrically arranged at the edge of the top inner side of the detection device;

[0008] An adjusting component is arranged at the lower end of the inner side of the detection device, and a rotating piece for opening and closing the air inlet and the air outlet is arranged at the output end of the adjusting component;

[0009] The composite sensor monitoring circuit board is installed on the lower surface of the rotating plate to detect the change of the fire sensing characteristic quantity of the gas in the lithium-ion battery box and make the rotating plate rotate or retract accordingly through the adjustment component.

[0010] Preferably, the lower surface of the rotating plate includes an intake fan and an exhaust fan, and the intake fan and the exhaust fan are distributed at intervals along the circumference of the rotating plate.

[0011] Preferably, a protective mesh cover is mounted on the outer surface of the adjustment component, and the protective mesh cover is fixed to the lithium-ion battery box by bolts.

[0012] Preferably, the protective mesh cover is made of stainless steel.

[0013] Preferably, a sealing ring is fixed on the upper surface of the rotating plate.

[0014] Preferably, two sealing rings are provided, and the material of the sealing rings is silicone rubber or fluororubber.

[0015] Preferably, the adjustment assembly includes a linear motor and a rotary motor, the linear motor is fixed to the inner wall of the lithium-ion battery box, and a rotary motor is arranged on one side of the linear motor, and the output end of the rotary motor is fixed to the rotating plate.

[0016] Preferably, a through hole is opened on the inner side of the rotating plate, and two through holes are provided.

[0017] Preferably, a maintenance door is hingedly connected to the front surface of the lithium-ion battery box.

[0018] Preferably, the lithium-ion battery box is provided with connection terminals electrically connected to the battery.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention is provided with an air inlet, an air outlet, a rotating sheet, a composite sensor monitoring circuit board and an adjusting component, so as to avoid the traditional ventilation through a breathable valve, which requires a certain pressure and has a slow ventilation speed. The device can timely detect the gas inside the lithium-ion battery box through the composite sensor monitoring circuit board to perform active ventilation. When the characteristic quantity of the gas fluctuates slightly, it is due to the difference in the process and production level of the battery box, causing the fire characteristic gas in the battery box to exceed the alarm threshold. At this time, normal ventilation action is performed to ensure that the box gas background noise or background is normal, and then it is in an effective detection state. When the characteristic quantity fluctuates in a large range, a fire may occur in the lithium-ion battery box, and active closed ventilation can be performed to reduce the spread of the fire to the outside of the lithium-ion battery box, and the signal is transmitted to the outside for alarm so that external personnel can deal with it. In addition, by providing an air intake fan and an exhaust fan, it is convenient to increase the gas flow speed, and the ventilation action is performed efficiently, so that the gas inside the lithium-ion battery box is completely discharged to the outside for ventilation, and the gas inside the lithium-ion battery box is completely discharged. The device has a simple structure, is convenient for later disassembly and maintenance, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2It is a schematic diagram of the structure of the protective mesh cover of the present invention;

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the protective net cover of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the rotating sheet of the present invention;

[0025] Figure 5 It is a schematic diagram of the sealing ring structure of the present invention.

[0026] In the figure: 1. lithium-ion battery box; 2. maintenance door; 301. air inlet; 302. air outlet; 4. wiring terminal; 5. battery; 6. protective mesh cover; 701. linear motor; 702. rotary motor; 8. rotating plate; 801. through hole; 9. air intake fan; 10. composite sensor monitoring circuit board; 11. sealing ring; 12. exhaust fan. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 5 The present invention provides a technical solution: a lithium-ion battery box external detection system with automatic ventilation function, comprising:

[0029] Lithium-ion battery box 1;

[0030] A detection device detachably embedded in a lithium-ion battery box 1, the detection device comprising an air inlet 301, an air outlet 302 and an adjustment component, the air outlet 302 and the air inlet 301 are symmetrically arranged at the edge of the top inner side of the detection device, so as to facilitate the introduction of external gas into the inner side of the lithium-ion battery box 1, and the gas inside the lithium-ion battery box 1 is discharged to the outside for ventilation;

[0031] The adjusting component is arranged at the lower end of the inner side of the detection device, and the output end of the adjusting component is provided with a rotating piece 8 for opening and closing the air inlet hole 301 and the air outlet hole 302, so as to adjust the opening and closing of the air inlet and the air outlet;

[0032] The composite sensor monitoring circuit board 10 is installed on the lower surface of the rotating plate 8 to detect the change of the fire sensing characteristic quantity of the gas in the lithium-ion battery box 1 and make the rotating plate 8 rotate or retract accordingly through the adjustment component, so as to detect the characteristic quantity of the gas inside the lithium-ion battery box 1, such as the size of the temperature, the concentration change of smoke, carbon monoxide, and VOC. When the fluctuation range of the characteristic quantity of the gas is small, such as the gas released by the material of the lithium-ion battery box 1 or the material of the internal components, it is a normal situation. The composite sensor monitoring circuit board 10 transmits the control signal to the linear The motor 701 and the rotating motor 702 rotate the rotating plate 8 so that the air intake fan 9 corresponds to the air intake hole 301, and the exhaust fan 12 corresponds to the air outlet hole 302, so that the inside of the lithium-ion battery box 1 is ventilated normally. When the characteristic quantity of the gas fluctuates in a large range, the battery 5 inside the lithium-ion battery box 1 may thermally run away and cause a fire. At this time, the rotating plate 8 rotates to close the air intake hole 301 and the air outlet hole 302, reducing the oxygen content inside the lithium-ion battery box 1 and reducing the spread of the fire to the outside. At the same time, the signal will be transmitted to the outside so that the user can take different disposal measures;

[0033] Preferably, the lower surface of the rotating plate 8 includes an intake fan 9 and an exhaust fan 12, and the intake fan 9 and the exhaust fan 12 are spaced apart along the circumference of the rotating plate 8 to facilitate the realization of two modes. In the ventilation mode, gas exchange inside and outside the lithium-ion battery box 1 is realized; in the detection mode, normal operation is achieved, and the composite sensor monitoring circuit board 10 is used to detect in real time whether there is thermal runaway or fire characteristics inside the lithium-ion battery box 1.

[0034] Preferably, a protective mesh cover 6 is mounted on the outer surface of the adjustment component, and the protective mesh cover 6 is fixed to the lithium-ion battery box 1 by bolts to prevent the components inside the lithium-ion battery box 1 from contacting and colliding with the linear motor 701 or the rotary motor 702 .

[0035] Preferably, a sealing ring 11 is fixed on the upper surface of the rotating piece 8 to facilitate better closing or opening of the air inlet 301 and the air outlet 302 through the rotating piece 8 .

[0036] Preferably, two sealing rings 11 are provided, and the material of the sealing rings 11 is silicone rubber or fluororubber, so as to achieve better high temperature resistance.

[0037] Preferably, the adjustment component includes a linear motor 701 and a rotary motor 702 , the linear motor 701 is fixed to the inner wall of the lithium-ion battery box 1 , and a rotary motor 702 is provided on one side of the linear motor 701 , and the output end of the rotary motor 702 is fixed to the rotating plate 8 .

[0038] Preferably, a through hole 801 is opened on the inner side of the rotating plate 8 , and two through holes 801 are provided to correspond to the intake fan 9 and the exhaust fan 12 .

[0039] Preferably, the material of the protective mesh cover 6 is stainless steel, which is better for corrosion resistance and high temperature resistance.

[0040] Preferably, a maintenance door 2 is hingedly connected to the front surface of the lithium-ion battery box 1 .

[0041] Preferably, the lithium-ion battery box 1 is provided with a connection terminal 4 electrically connected to the battery 5 .

[0042] The working principle and use process of the present invention are as follows: when in use, when the composite sensor monitoring circuit board 10 detects that the fluctuation range of the gas characteristic quantity in the lithium-ion battery box 1 is small, it enters the normal ventilation mode, and the linear motor 701 drives the rotating motor 702 and the rotating plate 8 to descend. After the linear motor 701 drives the rotating plate 8 to rotate 90°, the air intake fan 9 and the air intake hole 301 are relative, and the exhaust fan 12 and the air outlet 302 start to work for ventilation; when the fluctuation range of the gas characteristic quantity is large, the battery 5 in the lithium-ion battery box 1 may have thermal runaway, and the rotating plate 8 is rotated in the same way. The rotating plate 8 blocks the air intake hole 301 and the air outlet 302 to maintain the sealing state of the device, and sends a signal to the outside to alarm so that the user can take corresponding measures. The present invention is provided with an air intake hole, an air outlet, a rotating plate, and a composite The sensor monitors the circuit board and the adjustment component. First, the composite sensor can be used to monitor the circuit board for possible thermal runaway of the battery inside the box. Second, the changes in the fire characteristics caused by it can be detected online, and an alarm can be generated and transmitted to the outside for early warning. It can solve the uneven process and manufacturing level of the battery box. The gas inside the battery box, such as carbon monoxide, VOC hydrogen and other typical fire characteristic gases, accumulates for a long time and exceeds the gas alarm value, thereby causing the detection device to fail. Once the power is on, the initial detection value exceeds the alarm value. The adjusting component can be used to make the rotating piece rotate or retract accordingly to discharge the accumulated gas in the box, thereby ensuring that the box gas bottom noise or background is normal, and then in an effective detection state, solving the problem of excessive gas accumulation in the traditional battery box for a long time and the inability to quickly discharge it only through the air valve.

[0043] 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-ion battery box external detection system with automatic ventilation function, characterized in that: include: Lithium-ion battery box (1); A detection device that is detachably embedded and installed in the lithium-ion battery box (1), the detection device comprising an air inlet (301), an air outlet (302) and an adjustment component, the air outlet (302) and the air inlet (301) being symmetrically arranged at the edge of the top inner side of the detection device; An adjustment component is arranged at the lower end of the inner side of the detection device, and a rotating piece (8) for opening and closing the air inlet (301) and the air outlet (302) is arranged at the output end of the adjustment component; The composite sensor monitoring circuit board (10) is mounted on the lower surface of the rotating plate (8) to detect changes in the fire sensing characteristic quantity of the gas in the lithium-ion battery box (1) and to make the rotating plate (8) perform corresponding rotation or extension actions through an adjustment component.

2. The lithium-ion battery box external detection system with automatic ventilation function according to claim 1, characterized in that: The lower surface of the rotating plate (8) comprises an air intake fan (9) and an exhaust fan (12), and the air intake fan (9) and the exhaust fan (12) are distributed at intervals along the circumference of the rotating plate (8).

3. The lithium-ion battery box external detection system with automatic ventilation function according to claim 1, characterized in that: The outer surface of the adjustment component is covered with a protective mesh cover (6), and the protective mesh cover (6) is fixed to the lithium-ion battery box (1) by bolts.

4. The lithium-ion battery box external detection system with automatic ventilation function according to claim 3 is characterized in that: The material of the protective mesh cover (6) is stainless steel.

5. The lithium-ion battery box external detection system with automatic ventilation function according to claim 1, characterized in that: A sealing ring (11) is fixed on the upper surface of the rotating plate (8).

6. The lithium-ion battery box external detection system with automatic ventilation function according to claim 5, characterized in that: Two sealing rings (11) are provided, and the material of the sealing rings (11) is silicone rubber or fluororubber.

7. The lithium-ion battery box external detection system with automatic ventilation function according to claim 1, characterized in that: The adjustment component comprises a linear motor (701) and a rotary motor (702); the linear motor (701) is fixed to the inner wall of the lithium-ion battery box (1); a rotary motor (702) is arranged on one side of the linear motor (701); and an output end of the rotary motor (702) is fixed to a rotary sheet (8).

8. The lithium-ion battery box external detection system with automatic ventilation function according to claim 1, characterized in that: A through hole (801) is provided on the inner side of the rotating plate (8), and two through holes (801) are provided.

9. The lithium-ion battery box external detection system with automatic ventilation function according to claim 1, characterized in that: The front surface of the lithium-ion battery box (1) is connected to a maintenance door (2) via a hinge.

10. The lithium-ion battery box external detection system with automatic ventilation function according to claim 1, characterized in that: The lithium-ion battery box (1) is provided with a connection terminal (4) electrically connected to the battery (5).

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