A battery for electric vehicle with overheat protection structure

Abstract

The present invention relates to a storage battery for electric vehicles with an overheat protection structure applied in the field of storage battery technology. A micro heat dissipation channel can be formed between two adjacent battery bodies. Compared with the prior art, the heat dissipation speed between multiple battery bodies connected in series can be effectively improved, the possibility of heat accumulation can be greatly reduced, and the safety hazard during riding or charging can be effectively reduced. In addition, through the arrangement of a temperature measuring strip and an air intake air rack, when riding, the vehicle speed can be used to allow the outside air to quickly enter the micro heat dissipation channel, thereby greatly accelerating the heat dissipation effect on the battery body. After overheating, the intelligent inflation component can be automatically controlled to increase the inflation speed. On the one hand, the heat dissipation speed can be accelerated to effectively avoid continued heat accumulation. On the other hand, a thermal alarm unit can be spontaneously triggered at a faster gas speed to remind the user. Compared with the prior art, the safety hazard when multiple battery bodies are used in series is greatly reduced.

Description

Technical Field

[0001] The present invention relates to a storage battery for electric vehicles, and in particular to a storage battery for electric vehicles with an overheat protection structure applied in the technical field of storage batteries. Background Art

[0002] A device that converts chemical energy into electrical energy is called a chemical battery, generally referred to as a battery. After discharge, the internal active substances can be regenerated by charging - the electrical energy is stored as chemical energy; when discharge is required, the chemical energy is converted into electrical energy again. This type of battery is called a storage battery, also known as a secondary battery or a lead-acid storage battery. The so-called storage battery is an electrochemical device that stores chemical energy and releases electrical energy when necessary.

[0003] For electric vehicles, their batteries are generally connected in series in 2-4 units. Due to the limited space in electric vehicles, multiple batteries connected in series are generally arranged in parallel and in contact with each other. However, when the electric vehicle is ridden for a long time or charged, it will generate heat. The contact arrangement in the prior art is not conducive to heat dissipation and is prone to overheating risks. In severe cases, there may even be a safety hazard of spontaneous combustion. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that when multiple batteries of existing electric vehicles are connected in series, heat is easily accumulated, and there is a great safety hazard when excessive heat is generated.

[0005] In order to solve the above problems, the present invention provides a storage battery for electric vehicles with an overheat protection structure, comprising a plurality of battery bodies arranged in parallel with each other, wherein a control chip is arranged on one of the battery bodies, two terminals are connected to the upper end of the battery body, and an overheat protection unit is arranged on the plurality of battery bodies, the overheat protection unit comprising a speed sensor and a raindrop sensor installed on the electric vehicle, and a plurality of pairs of temperature measuring strips and two induced draft air racks installed on the battery body;

[0006] In two adjacent battery bodies: a wire is electrically connected between the terminal in front of one battery body and the terminal in the rear of the other battery body, a plurality of pads are adhered to the ends of the two battery bodies close to each other, the positions of the plurality of pads on the two battery bodies correspond to and contact each other, and the plurality of pads form a micro heat dissipation channel between the two adjacent battery bodies, and each pair of temperature measuring strips are respectively adhered to the middle of the ends of the two adjacent battery bodies close to each other, and the two temperature measuring strips do not contact each other;

[0007] Two induced draft air racks are respectively arranged at the front and rear ends of the multiple battery bodies, and the induced draft air racks include multiple porous exhaust pipes corresponding to the openings of the multiple micro heat dissipation channels, multiple pairs of corrugated pipes respectively connected between two adjacent porous exhaust pipes, and an induced draft pipe fixedly connected to the outer end of one of the porous exhaust pipes. An intelligent inflation component is installed on the induced draft pipe, and the intelligent inflation component is connected to the control chip signal. Two connecting frame seats are adhered to the two battery bodies located at the outermost edges, and the two connecting frame seats are respectively located on the front and rear sides of the battery bodies. The outer ends of the two porous exhaust pipes at the outermost edges are fixedly connected with L-shaped plug rods, and the L-shaped plug rods are inserted in the connecting frame seats.

[0008] In the above-mentioned electric vehicle battery with an overheat protection structure, a micro heat dissipation channel can be formed between two adjacent battery bodies through the provision of an overheat protection unit. Compared with the prior art, it can effectively improve the heat dissipation speed between multiple battery bodies connected in series, greatly reduce the possibility of heat accumulation, and effectively reduce safety hazards during riding or charging.

[0009] As a further improvement of the present application, one end of the air duct away from the porous exhaust pipe is installed on the electric vehicle, and the mouth of the air duct is communicated with the outside and faces the front side of the electric vehicle.

[0010] As a further improvement of the present application, the two induced draft air racks are staggered up and down, and the lower end of one induced draft air rack and the upper end of the other induced draft air rack are located on the same horizontal plane.

[0011] As a further improvement of the present application, the temperature measuring strip includes an L-shaped thermal conductive strip bonded to the battery body and a temperature sensing strip fixedly connected to the L-shaped thermal conductive strip away from the middle of the battery body. The temperature sensing strip includes a heat sensing section and a measuring section fixedly connected to the heat sensing section. The two relative temperature sensing strips are arranged upside down.

[0012] As a further improvement of the present application, a pressure sensor is installed inside the measuring section, and the measuring section is also filled with hot-melt filler. The end face of the measuring section corresponding to the sensing end of the pressure sensor is a straight elastic sealing structure, and the pressure sensor does not contact the straight elastic end face of the measuring section.

[0013] As a further improvement of the present application, the interior of the heat-sensitive section is saturated with helium, and a through hole is opened at the corresponding position of the heat-sensitive section and the pressure sensor in another temperature-sensitive strip. A pre-expansion layer is fixedly connected to the mouth of the through hole. The pre-expansion layer is an elastic sealing structure, and the longitudinal and lateral lengths of the pre-expansion layer are both greater than the distance between the two temperature-sensitive strips.

[0014] As another improvement of the present application, the air duct includes an air intake section, an exhaust section and a hollow air guide column fixedly connected between the air intake section and the exhaust section. A thermal alarm unit is also connected in parallel to the air duct. An air baffle is fixedly connected inside the hollow air guide column. The exhaust section and the connection points of the thermal alarm unit and the hollow air guide column are respectively located on both sides of the air baffle, and the air intake section and the exhaust section are located on the same side of the air baffle.

[0015] As another improved supplement of the present application, the air baffle includes a rotating shaft fixed to the middle part of the hollow air guide column, a fixed plate fixedly connected between the rotating shaft and the inner wall of the hollow air guide column, and a self-resetting plate connected to the rotating shaft through a self-resetting spring, and the end of the self-resetting plate is in contact with the inner wall of the hollow air guide column.

[0016] As another improved supplement of the present application, the thermal alarm unit includes an air leakage pipe and a whistle fixedly connected to the middle of the air leakage pipe.

[0017] In summary, through the setting of the overheating protection unit, a micro heat dissipation channel can be formed between two adjacent battery bodies. Compared with the existing technology, the heat dissipation speed between multiple battery bodies connected in series can be effectively improved, the possibility of heat accumulation can be greatly reduced, and the safety hazards during riding or charging can be effectively reduced; in addition, through the setting of the temperature measuring strip and the air induced air rack, when riding, the vehicle speed can be used to allow the outside air to quickly enter the micro heat dissipation channel, thereby greatly accelerating the heat dissipation effect of the battery body. After overheating, the intelligent inflation component can be automatically controlled to increase the inflation speed. On the one hand, the heat dissipation speed can be accelerated to effectively avoid continued heat accumulation. On the other hand, the thermal alarm unit can be spontaneously triggered at a faster gas speed to remind the user. Compared with the existing technology, the safety hazards when multiple battery bodies are used in series are greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the first embodiment of the present application;

[0019] Figure 2 A top view of the first embodiment of the present application;

[0020] Figure 3 A three-dimensional diagram of two opposing temperature measuring strips according to a first embodiment of the present application;

[0021] Figure 4 This is a cross-sectional view of two temperature sensing strips when not in use according to the first embodiment of the present application;

[0022] Figure 5 This is a cross-sectional view of two temperature sensing strips when the first embodiment of the present application is in use;

[0023] Figure 6 This is a cross-sectional view of two temperature sensing strips in the first embodiment of the present application when overheated;

[0024] Figure 7 This is a side schematic diagram of the first embodiment of the present application when two induced draft air racks are cooling the battery;

[0025] Figure 8 This is a partial schematic diagram of the air duct of the second embodiment of the present application;

[0026] Fig. 9 This is a schematic diagram of the second embodiment of the present application after the thermal alarm unit is turned on after overheating.

[0027] Description of the numbers in the figure:

[0028] 1 battery body, 2 terminal, 3 wire, 4 temperature measuring strip, 41 L-shaped thermal conductive strip, 42 temperature sensing strip, 421 thermal sensing section, 422 measuring section, 5 induced draft rack, 51 induced draft pipe, 52 porous exhaust pipe, 53 bellows, 501 connecting frame, 502 L-shaped plug rod, 6 cushion block, 7 pressure sensor, 8 pre-expansion layer, 511 air intake section, 512 exhaust section, 513 hollow air guide column, 514 air leakage pipe, 91 fixed plate, 92 self-resetting plate, 10 whistle. DETAILED DESCRIPTION

[0029] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1 and Figure 2 A storage battery for an electric vehicle with an overheat protection structure is shown, comprising a plurality of battery bodies 1 arranged in parallel with each other, wherein a control chip is arranged on one of the battery bodies 1, two terminals 2 are connected to the upper end of the battery body 1, and an overheat protection unit is arranged on the plurality of battery bodies 1, the overheat protection unit comprising a speed sensor and a raindrop sensor installed on the electric vehicle, and a plurality of pairs of temperature measuring strips 4 and two induced draft air racks 5 installed on the battery body 1. When the temperature measuring strip 4 detects an overheat condition, when the speed sensor has data, it is determined that the electric vehicle is in a riding state, and the gas entering the induced draft air rack 5 has a certain speed at this time. When the intelligent inflatable component is controlled to start inflating, it only needs to make the speed at which the air enters the induced draft air rack 5 to reach the target speed at a relatively low energy consumption, so as to further accelerate the heat dissipation. When the speed sensor has no data, it indicates that the overheating is in the charging state. At this time, the intelligent inflatable component needs to control the air to enter the micro heat dissipation channel at a relatively fast speed for heat dissipation, so as to realize that the intelligent inflatable component works at different energy consumptions under different conditions, thereby achieving the effect of energy saving.

[0032] In addition, it is worth noting that when riding, if the raindrop sensor does not detect rain, the control center controls the solenoid valve to be in a normally open state, so that outside air can enter the micro heat dissipation channel, which is convenient for rapid heat dissipation during riding, and effectively avoids overheating of the battery body 1 caused by long-term riding, thereby achieving the effect of thermal protection. When the raindrop sensor detects rain, the solenoid valve is closed, making the battery body 1 less susceptible to the influence of external rain.

[0033] In two adjacent battery bodies 1: a wire 3 is electrically connected between the terminal 2 in front of one battery body 1 and the terminal 2 in the rear of the other battery body 1, and a plurality of pads 6 are adhered to the ends of the two battery bodies 1 that are close to each other. The positions of the plurality of pads 6 on the two battery bodies 1 correspond to and contact each other. The plurality of pads 6 form a micro heat dissipation channel between the two adjacent battery bodies 1, which can effectively improve the heat dissipation speed between the plurality of battery bodies 1 connected in series, greatly reduce the possibility of heat accumulation, and effectively reduce the safety hazard during riding or charging. Each pair of temperature measuring strips 4 are respectively adhered to the middle of the ends of the two adjacent battery bodies 1 that are close to each other, and the two temperature measuring strips 4 do not contact each other.

[0034] In addition, in the specific implementation, multiple temperature sensors can also be used instead of the temperature measuring strip 4, but the temperature sensor cannot fully cover the battery body 1, resulting in local detection data, and the monitoring accuracy of whether the battery body 1 as a whole is overheated is low. The temperature measuring strip 4 of this solution can be set up vertically and horizontally, across the battery body 1, and the temperature monitoring is achieved in coordination with each other, so that the monitoring effect is better, and it can be selectively set according to actual needs during implementation.

[0035] Two induced draft air racks 5 are respectively arranged at the front and rear ends of the plurality of battery bodies 1, and the induced draft air racks 5 include a plurality of porous exhaust pipes 52 respectively corresponding to the openings of the plurality of micro heat dissipation channels, a plurality of pairs of corrugated pipes 53 respectively connected between two adjacent porous exhaust pipes 52, and an induced draft pipe 51 fixedly connected to the outer end of one of the porous exhaust pipes 52, and an intelligent inflation component is installed on the induced draft pipe 51, and the intelligent inflation component is connected to the control chip signal, and two connecting brackets 501 are adhered to the two battery bodies 1 at the most edge, and the connecting brackets 5 01 is composed of a bottom plate bonded to the battery body 1, two support rods fixedly connected to the bottom plate, and hard tubes fixedly connected to the ends of the two support rods. The two connecting seats 501 are respectively located on the front and rear sides of the battery body 1. The outer ends of the two porous exhaust pipes 52 at the edge are fixedly connected with L-shaped plug rods 502. The L-shaped plug rods 502 are inserted into the hard tubes of the connecting seats 501. When installing, the two connecting seats 501 are symmetrical to each other, which effectively ensures that after the air frame 5 is installed, the multiple porous exhaust pipes 52 can just face the micro heat dissipation channel.

[0036] One end of the air duct 51 away from the porous exhaust pipe 52 is installed on the electric vehicle, and the mouth of the air duct 51 is connected to the outside and faces the front side of the electric vehicle, so that when the electric vehicle is riding, due to the speed, the outside air can quickly fill into the air duct 51 and spray out towards the mouth of each micro heat dissipation channel. The air duct 51 is installed with a solenoid valve connected to the control center signal to control the connection and disconnection of the air duct 51 with the outside.

[0037] The two induced draft air racks 5 are staggered up and down, and the lower end of one induced draft air rack 5 and the upper end of the other induced draft air rack 5 are located on the same horizontal plane, so that the two induced draft air racks 5 can spray air into the micro heat dissipation channel while being staggered up and down on both sides, so that the air flow difference on both sides of the micro heat dissipation channel is not easy to be too large, thereby improving the uniformity of heat dissipation.

[0038] like Figure 3 and Figure 4 The temperature measuring strip 4 includes an L-shaped heat-conducting strip 41 bonded to the battery body 1 and a temperature-sensing strip 42 fixedly connected to the L-shaped heat-conducting strip 41 away from the middle of the battery body 1. The temperature-sensing strip 42 includes a heat-sensing section 421 and a measuring section 422 fixedly connected to the heat-sensing section 421. The two opposite temperature-sensing strips 42 are arranged upside down. A pressure sensor 7 is installed inside the measuring section 422. The measuring section 422 is also filled with hot-melt filler. The end surface of the measuring section 422 corresponding to the sensing end of the pressure sensor 7 is a straight elastic sealing structure, and the pressure sensor 7 does not contact the straight elastic end surface of the measuring section 422. The heat-sensing section 421 is saturated with helium. Through holes are drilled at the corresponding positions of the heat-sensing section 421 and the pressure sensor 7 in the other temperature-sensing strip 42. The through-hole mouth is fixedly connected to a pre-expansion layer 8. The pre-expansion layer 8 is an elastic sealing structure, and the longitudinal and transverse lengths of the pre-expansion layer 8 are both greater than the distance between the two temperature-sensing strips 42. Figure 5 When the battery body 1 is heated during use, the helium expands under the action of heat, causing the elastic pre-expansion layer 8 to expand and gradually approach the relative temperature measuring strip 4. At this time, due to the normal heating of the battery body 1, it is not enough to melt the measuring section 422, so the pressure sensor 7 is not subjected to force. Figure 6 When the battery body 1 is overheated, the measuring section 422 gradually softens and melts, and the elastic part of the measuring section 422 loses the internal hard support and deforms toward the pressure sensor 7 under the extrusion of the expanded pre-expansion layer 8, so that the force data of the pressure sensor 7 gradually increases. At this time, after the control center receives the signal, it is judged as overheating, and the intelligent inflation component can be used to speed up the flow speed of air in the micro heat dissipation channel, thereby speeding up the heat dissipation, effectively protecting the battery body 1 so that the temperature inside it is not easy to continue to rise, thereby achieving the protection of the battery body 1.

[0039] The hot melting temperature of the hot melting filler is about 5°C lower than the safe operating temperature of the battery.

[0040] It is worth noting that the temperature measuring strip 4 and the draft air rack 5 for overheating protection provided in the present application are both externally bonded to the battery body 1, making them reusable, and they are highly adaptable to existing batteries that have been produced. During production, there is no need to change any structure of the battery itself.

[0041] The second implementation method:

[0042] Based on the first embodiment, this embodiment adds a thermal alarm unit and related technical features, and the rest is consistent with the first embodiment.

[0043] Figure 8 As shown, the air duct 51 includes an air intake section 511, an exhaust section 512, and a hollow air guide column 513 fixedly connected between the air intake section 511 and the exhaust section 512. A thermal alarm unit is also connected in parallel to the air duct 51. An air baffle is fixedly connected inside the hollow air guide column 513. The exhaust section 512 and the connection points of the thermal alarm unit and the hollow air guide column 513 are respectively located on both sides of the air baffle, and the air intake section 511 and the exhaust section 512 are located on the same side of the air baffle. The air baffle includes a rotating shaft fixed to the middle of the hollow air guide column 513, a rotating shaft fixedly connected to the rotating shaft, and a rotating shaft fixedly connected to the rotating shaft. The fixed plate 91 between the shaft and the inner wall of the hollow air guide column 513 and the self-resetting plate 92 connected to the rotating shaft through a self-resetting spring make the electric vehicle lose the thrust of the air when it is stationary. The self-resetting plate 92 can automatically reset under the action of the self-resetting spring, so that when riding again, it is difficult for air to enter the mouth of the leakage pipe 514 without excessive heating of the battery body 1, and the thermal alarm unit will not be triggered. The end of the self-resetting plate 92 is in contact with the inner wall of the hollow air guide column 513, and the thermal alarm unit includes the leakage pipe 514 and a whistle 10 fixedly connected to the middle of the leakage pipe 514.

[0044] When riding, when air spontaneously enters the micro heat dissipation channel to accelerate heating, and the pressure sensor 7 still detects significantly increased data, the control center can control the intelligent inflation component to assist in accelerating the air to enter the micro heat dissipation channel to accelerate heat dissipation. At the same time, the excessively fast air speed at this time can push the self-reset plate 92 to change its rotation amplitude and cross the mouth of the leakage pipe 514, so that part of the air can enter the whistle 10 along the leakage pipe 514, causing the whistle 10 to emit an obvious sound to realize an alarm to remind the user that there is a safety hazard in the battery. Then the gas can enter the exhaust section 512 along the leakage pipe 514 to dissipate heat to the battery body 1 together.

[0045] In addition, it is worth noting that a one-way valve can be installed on one end of the air leakage pipe 514 close to the exhaust section 512, so that the air entering the exhaust section 512 is not easy to flow back into the air leakage pipe 514. At the same time, the air leakage pipe 514 on the side of the whistle 10 close to the exhaust section 512 can also be omitted, so that the air entering the whistle 10 is directly discharged after making the whistle 10 sound. In the specific implementation, one setting can be selected.

[0046] In addition, the thermal alarm unit can also monitor the vehicle speed to a certain extent. When the electric vehicle equipped with the battery is riding too fast, the air flow rate entering the air duct 51 is also too fast, which can also trigger the thermal alarm unit. At this time, the user and people around the road can be reminded to reduce safety hazards. When riding, when the thermal alarm unit sounds an alarm, the user needs to reduce the speed. At this time, the alarm disappears, indicating that it is caused by the vehicle speed. When the alarm still does not disappear, it means that the battery is overheated.

[0047] In summary, through the setting of the overheating protection unit, a micro heat dissipation channel can be formed between two adjacent battery bodies 1. Compared with the prior art, the heat dissipation speed between multiple battery bodies 1 connected in series can be effectively improved, the possibility of heat accumulation can be greatly reduced, and the safety hazard during riding or charging can be effectively reduced; in addition, through the setting of the temperature measuring strip 4 and the air induced air rack, when riding, the vehicle speed can be used to allow the outside air to quickly enter the micro heat dissipation channel, thereby greatly accelerating the heat dissipation effect of the battery body 1. After overheating, the intelligent inflation component can be automatically controlled to increase the inflation speed. On the one hand, the heat dissipation speed can be accelerated to effectively avoid continued heat accumulation. On the other hand, the thermal alarm unit can be spontaneously triggered at a faster gas speed to remind the user. Compared with the prior art, the safety hazard when multiple battery bodies 1 are used in series is greatly reduced.

[0048] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A battery for electric vehicles with an overheat protection structure, characterized in that: The invention comprises a plurality of battery bodies (1) arranged in parallel with each other, wherein a control chip is arranged on one of the battery bodies (1), two terminals (2) are connected to the upper end of the battery body (1), and an overheat protection unit is arranged on a plurality of the battery bodies (1), wherein the overheat protection unit comprises a speed sensor and a raindrop sensor installed on the electric vehicle, and a plurality of pairs of temperature measuring strips (4) and two induced draft air racks (5) are installed on the battery body (1); In two adjacent battery bodies (1), a wire (3) is electrically connected between a terminal (2) in front of one battery body (1) and a terminal (2) in rear of another battery body (1); a plurality of pads (6) are adhered to the ends of the two battery bodies (1) that are close to each other; the positions of the plurality of pads (6) on the two battery bodies (1) correspond to and contact each other; the plurality of pads (6) form a micro heat dissipation channel between the two adjacent battery bodies (1); each pair of the temperature measuring strips (4) are respectively adhered to the middle of the ends of the two adjacent battery bodies (1) that are close to each other, and the two temperature measuring strips (4) do not contact each other; The two induced draft air racks (5) are respectively arranged at the front and rear ends of the plurality of battery bodies (1), the induced draft air racks (5) comprising a plurality of porous exhaust pipes (52) respectively corresponding to the openings of the plurality of micro heat dissipation channels, a plurality of pairs of corrugated pipes (53) respectively connected between two adjacent porous exhaust pipes (52), and an induced draft pipe (51) fixedly connected to the outer end of one of the porous exhaust pipes (52), the induced draft pipe (51) being provided with an intelligent inflation component, the intelligent inflation component being connected to a control chip signal, two connecting brackets (501) being adhered to the two battery bodies (1) at the outermost edges, the two connecting brackets (501) being respectively located at the front and rear sides of the battery bodies (1), the outer ends of the two porous exhaust pipes (52) at the outermost edges being fixedly connected with L-shaped plug rods (502), the L-shaped plug rods (502) being inserted into the connecting brackets (501); The temperature measuring strip (4) comprises an L-shaped heat-conducting strip (41) bonded to the battery body (1) and a temperature-sensing strip (42) fixedly connected to the L-shaped heat-conducting strip (41) away from the middle of the battery body (1), the temperature-sensing strip (42) comprising a heat-sensing section (421) and a measuring section (422) fixedly connected to the heat-sensing section (421), the two opposite temperature-sensing strips (42) being arranged upside down, a pressure sensor (7) being installed inside the measuring section (422), the measuring section (422) being also filled with hot-melt filler, the end surface of the measuring section (422) corresponding to the sensing end of the pressure sensor (7) being a straight elastic sealing structure, and the pressure sensor (7) not being in contact with the straight elastic end surface of the measuring section (422); The air induced duct (51) comprises an air intake section (511), an air exhaust section (512), and a hollow air guide column (513) fixedly connected between the air intake section (511) and the air exhaust section (512); a thermal alarm unit is also connected in parallel to the air induced duct (51); an air-following baffle is fixedly connected inside the hollow air guide column (513); the connection points between the air exhaust section (512) and the thermal alarm unit and the hollow air guide column (513) are respectively located on both sides of the air-following baffle, and the air intake section (511) and the air exhaust section (512) are located on the same side of the air-following baffle.

2. The battery for electric vehicles with an overheat protection structure according to claim 1, characterized in that: One end of the air duct (51) away from the porous exhaust pipe (52) is mounted on the electric vehicle, and the mouth of the air duct (51) is communicated with the outside and faces the front side of the electric vehicle.

3. The battery for electric vehicles with an overheat protection structure according to claim 1, characterized in that: The two induced draft air racks (5) are arranged in an offset manner up and down, and the lower end of one induced draft air rack (5) and the upper end of the other induced draft air rack (5) are located on the same horizontal plane.

4. The battery for electric vehicles with an overheat protection structure according to claim 1, characterized in that: The interior of the heat-sensing section (421) is saturated with helium, a through hole is drilled at a position corresponding to the pressure sensor (7) in the heat-sensing section (421) and another temperature-sensing strip (42), a pre-expansion layer (8) is fixedly connected to the mouth of the through hole, the pre-expansion layer (8) is an elastic sealing structure, and the longitudinal and transverse lengths of the pre-expansion layer (8) are both greater than the distance between the two temperature-sensing strips (42).

5. The battery for electric vehicles with an overheat protection structure according to claim 1, characterized in that: The air baffle comprises a rotating shaft fixed to the middle of the hollow air guide column (513), a fixed plate (91) fixedly connected between the rotating shaft and the inner wall of the hollow air guide column (513), and a self-resetting plate (92) connected to the rotating shaft via a self-resetting spring, wherein the end of the self-resetting plate (92) is in contact with the inner wall of the hollow air guide column (513).

6. The battery for electric vehicles with an overheat protection structure according to claim 5, characterized in that: The thermal alarm unit comprises an air leakage pipe (514) and a whistle (10) fixedly connected to the middle of the air leakage pipe (514).

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