Thermal runaway detection device with buffer protection

Abstract

The utility model discloses a thermal runaway detection device with a buffer protection function. The thermal runaway detection device comprises an upper-layer structure, a middle-layer structure and a lower-layer structure which are sequentially arranged in the vertical direction, the middle layer structure comprises a detection box body, a clamping groove structure is arranged in the detection box body, the clamping groove structure comprises a U-shaped clamping piece, a first screw rod and a circular elastic buffer pad, a threaded opening is formed in the top of the U-shaped clamping piece, and the circular elastic buffer pad is located in the U-shaped clamping piece; the first screw penetrates through the threaded opening, the lower end of the first screw is fixedly connected with the circular elastic buffer pad, a plurality of damping balls are fixed to the bottom of the inner side of the U-shaped clamping piece, and a circuit board is clamped between the damping balls and the circular elastic buffer pad. The utility model aims to solve the problems of misjudgment or missed judgment caused by the influence of environmental factors on equipment on a circuit board due to the conditions of collision, impact and the like during detection, and can quickly respond and give an alarm through the sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field, concretely relates to a thermal runaway detection device with buffer protection. BACKGROUND

[0002] With energy conservation and emission reduction, reducing energy dependence gradually becomes the development trend of international automobile industry and environmental protection industry, new energy vehicles are highly valued by countries all over the world as the development of alternative energy and the construction of sustainable development low-carbon society, and the phenomenon of abuse of lithium batteries is serious, leading to lithium battery combustion and explosion accidents occur from time to time, and the thermal runaway problem of lithium ion battery is one of the main reasons for the fire accident. When lithium ion battery thermal runaway occurs, gas and high-temperature organic electrolyte will be emitted, the gas contains combustible gas such as hydrogen, alkane, alkene and alkyne, these gases are the main combustible material to cause battery fire accident. In addition, the gas also contains hydrogen fluoride, hydrogen chloride and carbon monoxide and other toxic gases, which are released into the air and cause harm to the human body.

[0003] In actual use, the existing thermal runaway detection device is fixed in a certain place, the shell is easy to be hit by other vibrating workpieces, however, the internal structure of the thermal runaway detection device is relatively complex, after being hit, the circuit board may be damaged, and during long-term use, the circuit board may be bent, and in the process of vibration, impact and other processes in the bent state, the circuit board may be damaged prematurely, which may cause the equipment on the circuit board to be affected by environmental factors and misjudgment or omission.

[0004] In summary, in the prior art, the thermal runaway detection device has the problems of misjudgment or omission caused by damage of the circuit board due to impact and impact during detection. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art in the above background art, the purpose of the utility model is to provide a thermal runaway detection device with buffer protection to solve the problem of misjudgment or omission caused by damage of the circuit board due to impact and impact during detection of the thermal runaway detection device.

[0006] A thermal runaway detection device with buffer protection, comprising an upper structure, a middle structure and a lower structure arranged in sequence along the vertical direction;

[0007] The middle structure comprises a detection box body, a plurality of buckles are fixed around the detection box body, the buckles are arranged in two layers, the upper buckles are used to connect the upper structure and the detection box body, the lower buckles are used to connect the lower structure and the detection box body, a communication reserved port is formed in the side surface of the detection box body, and a clamping groove structure is arranged in the detection box body;

[0008] The card slot structure comprises a U-shaped clamping piece, a first screw rod and a circular elastic buffer pad, the opening of the U-shaped clamping piece faces the horizontal direction, a threaded hole is arranged at the top of the U-shaped clamping piece, the circular elastic buffer pad is arranged in the U-shaped clamping piece, the first screw rod penetrates through the threaded hole and is fixedly connected with the circular elastic buffer pad at the lower end, a plurality of shock-absorbing balls are fixedly arranged at the inner bottom of the U-shaped clamping piece, and the shock-absorbing balls and the circular elastic buffer pad are used for clamping the circuit board;

[0009] A fixing block is fixedly arranged at the outer bottom of the U-shaped clamping piece, a telescopic rod extending in the vertical direction is fixedly arranged at the bottom of the fixing block, a base is arranged at the lower end of the telescopic rod, a spring is sleeved on the telescopic rod, the fixing block and the base are respectively in abutment with the spring, the base is fixedly connected with one end of a second screw rod, the second screw rod extends in the horizontal direction and is threadedly connected with the detection box.

[0010] As a further scheme of the utility model, the upper layer structure is an upper cover body, and the upper cover body is provided with an upper cover air port at the top.

[0011] As a further scheme of the utility model, the upper cover body and the lower cover body are both made of metal.

[0012] As a further scheme of the utility model, the upper cover body is provided with a plurality of first openings at the side, the upper layer structure is buckled on the buckle of the upper layer through the first openings, the lower cover body is provided with a plurality of second openings at the side, and the lower layer structure is buckled on the buckle of the lower layer through the second openings.

[0013] As a further scheme of the utility model, the detection box is provided with L-shaped openings at the top and the bottom.

[0014] As a further scheme of the utility model, the detection box is fixedly provided with a fixing lug at the two sides.

[0015] As a further scheme of the utility model, the detection box is provided with an upper air hole at the top and a side air hole at the side.

[0016] As a further scheme of the utility model, a sensor is fixedly arranged on the circuit board.

[0017] As a further scheme of the utility model, a communication assembly, a CAN communication assembly or a network port assembly is inserted into the communication reserved port.

[0018] As a further scheme of the utility model, the sensor is a gas pressure sensor, a temperature sensor, a gas sensor or a sound sensor.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] (1) The utility model discloses when using, place the circuit board between the circular elastic buffer pad and the shock absorbing ball, then through the first screw rod and descend the circular elastic buffer pad, thereby realize the fixation of circuit board, provide the buffer for circuit board, through the second screw rod and drive the base to move left and right can place different models of circuit board, be provided with the spring between the fixed block and the base, the spring is around the telescopic rod, further provide the buffer effect for circuit board, avoid the impact, impact etc. When detecting, the equipment on the circuit board is influenced by environmental factors and misjudgment or the missing judgment of the equipment on the circuit board is caused.

[0021] (2) The utility model discloses when detecting, through the first opening of upper side and the second opening of side, if detecting gas is close to upper side, then from the first opening, if detecting gas is close to side, then from the second opening, such design can obviously reduce the detection time, through communication socket can quickly react and send the alarm.

[0022] (3) The utility model discloses upper layer structure and lower layer structure can play the role of anti-electromagnetic interference simultaneously, and the detection box and communication reserved mouth form a closed structure, prevent the foreign matter of outside from entering and lead to the detection not to be flexible, and the fixed lug seat is fixed on the detection box, and the clamping groove structure is seted up in the detection box, and the circuit board is fixedly installed on the clamping groove structure, and the overall stability of sensor is ensured.

[0023] (4) The utility model discloses through upper layer structure, middle layer structure and lower layer structure together enclose a detection cavity, realize the detection of each heat runaway parameter in the detection cavity, if circuit board has the failure, can open the upper layer structure through the buckle of upper layer and carry out real -time maintenance to the circuit board top. DRAWINGS

[0024] Figure 1 It is the side surface structure schematic diagram of the utility model's U type clamp piece;

[0025] Figure 2 It is the overall structure schematic diagram of the utility model;

[0026] Figure 3 It is the overall structure schematic diagram of the utility model's communication reserved mouth;

[0027] Figure 4 It is the upper layer structure schematic diagram of the utility model;

[0028] Figure 5 It is the lower layer structure schematic diagram of the utility model;

[0029] Figure 6 It is the middle layer structure schematic diagram of the utility model;

[0030] Figure 7The utility model discloses a circuit board schematic diagram.

[0031] In the drawing: 1 - upper structure;2 - middle structure;3 - lower structure;4 - detection box;5 - communication reserved mouth;6 - buckle;7 - upper air hole;8 - side air hole;9 - card slot structure;10 - circuit board;11 - upper cover air port;12 - first opening;13 - avoidance mouth;14 - second opening;15 - fixed lug seat;16 - U type card piece;17 - first screw rod;18 - circular elastic buffer pad;19 - shock absorbing ball;20 - fixed block;21 - telescopic rod;22 - spring;23 - base;24 - second screw rod. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0033] 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" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the features limited as "first" and "second" can be explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0034] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] Please refer to the drawings Figures 1-7The application discloses a thermal runaway detection device with buffer protection.

[0036] The middle layer structure 2 comprises a detection box 4, L-shaped openings are formed in the top and bottom of the battery detection box 4, an upper air hole 7 is formed in the top of the battery detection box 4, a side air hole 8 is formed in the side of the battery detection box 4, a plurality of buckles 6 are fixed around the detection box 4, the buckles 6 are arranged in two layers, the upper buckles 6 are used for connecting the upper layer structure 1 and the detection box 4, the lower buckles 6 are used for connecting the lower layer structure 3 and the detection box 4, a communication reserved port 5 is formed in the side of the detection box 4, and a clamping groove structure 9 is arranged in the detection box 4.

[0037] The communication reserved port 5 is provided with a communication assembly, a CAN communication assembly or a network port assembly.

[0038] The clamping groove structure 9 comprises a U-shaped clamping piece 16, a first screw rod 17 and a circular elastic buffer pad 18, the opening of the U-shaped clamping piece 16 faces the horizontal direction, a threaded hole is formed in the top of the U-shaped clamping piece 16, the circular elastic buffer pad 18 is arranged in the U-shaped clamping piece 16, the first screw rod 17 penetrates through the threaded hole and is fixedly connected with the circular elastic buffer pad 18 at the lower end, a plurality of damping balls 19 are fixed to the inner bottom of the U-shaped clamping piece 16, the damping balls 19 and the circular elastic buffer pad 18 are used for clamping a circuit board 10, the damping balls 19 can buffer the circuit board 10, and if the circuit board 10 is faulty, the upper layer structure 1 can be opened through the upper buckles 6 to realize real-time maintenance on the circuit board 10.

[0039] The bottom of the U-shaped clamping piece 16 is fixedly provided with a fixed block 20, the bottom of the fixed block 20 is fixedly provided with an extending rod 21 extending in the vertical direction, the lower end of the extending rod 21 is provided with a base 23, a spring 22 is sleeved on the extending rod 21, the fixed block 20 and the base 23 are respectively in abutment with the spring 22, the base 23 is fixedly connected with one end of a second screw rod 24, the second screw rod 24 extends in the horizontal direction and is threadedly connected with the detection box body 4. In use, the circuit board 10 is placed in the U-shaped clamping piece 16, the first screw rod 17 is tightened to lower the circular elastic buffer pad 18, and the circular elastic buffer pad 18 and the shock absorbing ball 19 clamp the circuit board 10 in the U-shaped clamping piece 16, so that the fixing of the circuit board 10 is realized, the circuit board 10 is provided with buffering, different models of circuit boards 10 can be placed by moving the base 23 left and right through the second screw rod 24, the spring 22 is arranged between the fixed block 20 and the base 23, the spring 22 surrounds the extending rod 21, and further buffering effect is provided for the circuit board 10, so that the circuit board 10 is prevented from being affected by environmental factors due to impact, shock and the like during detection.

[0040] The upper layer structure 1 is an upper cover body, the upper cover body is provided with an upper cover air port 11 at the top, and a plurality of first openings 12 are formed in the side surface of the upper cover body.

[0041] The lower layer structure 3 is a lower cover body, the lower cover body is provided with an avoiding port 13 in the side surface, and a plurality of second openings 14 are formed in the side surface of the lower cover body. The upper cover body and the lower cover body are both made of metal material, which can play a role of preventing electromagnetic interference.

[0042] The upper layer structure 1 is buckled on the upper buckles 6 through the first openings 12, and the lower layer structure is buckled on the lower buckles 6 through the second openings 14. When the upper layer structure 1 is buckled, only one air hole is left on the upper surface, which is used for air inlet or air outlet. During detection, the detection gas enters through the first openings 12 on the upper surface and the second openings 14 on the side surface. If the detection gas is close to the upper surface, it enters from the first openings 12, and if the detection gas is close to the side surface, it enters from the second openings 14. Such design can obviously reduce the detection time, and through the communication interface, the alarm can be quickly responded and sent out.

[0043] The detection box body 4 is fixedly provided with fixed lug seats 15 on both sides, and the fixed lug seats 15 pass out of the avoiding ports 13. The fixed lug seats 15 are used for the installation and fixation of the thermal runaway monitoring sensor in the monitoring place.

[0044] The sensor is a gas pressure sensor, a temperature sensor, a gas sensor or a sound sensor.

[0045] In the specific working process of the sensor, after the safety valve of the lithium ion battery is opened in the initial stage of thermal runaway, various gases are released. Considering the delay effect caused by the complex structure layout of the battery box on the gas flow, the delay can be compensated by using the gas pressure sensor and the temperature sensor. Once the safety valve of the lithium ion battery is opened, the released gas will quickly transmit the pressure information to every corner of the battery box through the intermolecular force, so that the average gas pressure in the battery box is instantaneously increased. Due to the response speed of the gas pressure sensor and the temperature sensor, the alarm speed of the lithium ion battery thermal runaway is improved, which is extremely important for the ternary battery and other batteries prone to thermal runaway and severe thermal runaway.

[0046] Finally, it should be noted that the circuit board 10, the sensor and other components involved in the utility model are all general standard components or components known to those skilled in the art. Their structure and principle can be known by the technical personnel through the technical manual or through the conventional experimental method. In the idle place of the device, all the electrical components, power elements, electrical components and the corresponding controllers and power supplies are connected by wires. The specific connection means should refer to the working principle in the utility model. The electrical components are connected in the order of working sequence. The detailed connection means are all known technologies in the art.

[0047] 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 thermal runaway detection device with buffer protection, characterized in that, It includes an upper structure (1), a middle structure (2) and a lower structure (3) arranged in sequence along the vertical direction; The middle layer structure (2) includes a detection box (4). The detection box (4) is fixed with multiple buckles (6) around its perimeter. The buckles (6) are arranged in two layers, with the upper buckle (6) used to connect the upper structure (1) to the detection box (4) and the lower buckle (6) used to connect the lower structure (3) to the detection box (4). The detection box (4) has a communication reserved port (5) on its side and a slot structure (9) inside the detection box (4). The slot structure (9) includes a U-shaped clip (16), a first screw (17), and a circular elastic buffer pad (18). The opening of the U-shaped clip (16) faces the horizontal direction. The top of the U-shaped clip (16) is provided with a threaded opening. The circular elastic buffer pad (18) is located inside the U-shaped clip (16). The first screw (17) passes through the threaded opening and its lower end is fixedly connected to the circular elastic buffer pad (18). Multiple shock-absorbing balls (19) are fixed on the bottom inner side of the U-shaped clip (16). The shock-absorbing balls (19) and the circular elastic buffer pad (18) are used to clamp the circuit board (10). A fixing block (20) is fixedly installed on the bottom of the outer side of the U-shaped clip (16). A telescopic rod (21) extending vertically is fixed to the bottom of the fixing block (20). A base (23) is installed at the lower end of the telescopic rod (21). A spring (22) is sleeved on the telescopic rod (21). The fixing block (20) and the base (23) abut against the spring (22) respectively. The base (23) is fixedly connected to one end of the second screw (24). The second screw (24) extends horizontally and is threadedly connected to the detection box (4).

2. The thermal runaway detection device with buffer protection according to claim 1, characterized in that, The upper structure (1) is an upper cover, and an upper cover air vent (11) is provided on the top of the upper cover; the lower structure (3) is a lower cover, and an avoidance opening (13) is provided on the side of the lower cover.

3. The thermal runaway detection device with buffer protection according to claim 2, characterized in that, Both the upper and lower covers are made of metal.

4. A thermal runaway detection device with buffer protection according to claim 2, characterized in that, The upper cover has multiple first openings (12) on its side, and the upper structure (1) is fastened to the upper buckle (6) through the first openings (12). The lower cover has multiple second openings (14) on its side, and the lower structure is fastened to the lower buckle (6) through the second openings (14).

5. A thermal runaway detection device with buffer protection according to claim 1, characterized in that, The detection box (4) has L-shaped openings at the top and bottom.

6. A thermal runaway detection device with buffer protection according to claim 1, characterized in that, The detection box (4) is fixed with fixed ear seats (15) on both sides.

7. A thermal runaway detection device with buffer protection according to claim 1, characterized in that, The top of the detection chamber (4) is provided with an upper air hole (7), and the side of the detection chamber (4) is provided with a side air hole (8).

8. A thermal runaway detection device with buffer protection according to claim 1, characterized in that, A sensor is fixedly mounted on the circuit board (10).

9. A thermal runaway detection device with buffer protection according to claim 1, characterized in that, A communication component, a CAN communication component, or a network port component is plugged into the communication reserved port (5).

10. A thermal runaway detection device with buffer protection according to claim 8, characterized in that, The sensor is a pressure sensor, temperature sensor, gas sensor, or sound sensor.

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