A fast-charging lithium-ion battery module heating structure

Abstract

The present invention relates to the field of battery heating technology, and specifically to a fast-charging lithium-ion battery module heating structure, including a battery box body, a bottom plate fixedly connected to the inside of the battery box body, a plurality of battery cells arranged above the bottom plate, heat conducting plates arranged on both sides of the plurality of battery cells, partitions arranged on the sides of every two heat conducting plates, a box cover arranged on the top of the battery box body, a plurality of air inlet holes opened inside the bottom plate and the partition, an auxiliary heating structure, and a start-up heating structure arranged at the bottom of the battery box body, specifically to a fast-charging lithium-ion battery module heating structure. The present invention controls the current size of electromagnetic block 2, controls the attraction of electromagnetic block 2 to magnetic block, and controls the current intensity of electromagnetic block 2, so that electromagnetic block 2 attracts the magnetic block and compresses it differently, thereby making the frequency of partition friction inconsistent.

Description

Technical Field

[0001] The present invention relates to the technical field of battery heating, and in particular to a fast-charging lithium-ion battery module heating structure. Background Art

[0002] In today's society, energy demand continues to grow, and traditional fossil energy is facing increasingly severe resource shortages and environmental pollution problems. In order to achieve sustainable development, it is imperative to find clean and efficient energy storage technology. Lithium-ion batteries, with their high energy density, long cycle life, and low self-discharge rate, have become one of the ideal choices to meet modern energy needs. However, the electrolyte of lithium-ion batteries is an organic solute. The viscosity of the electrolyte in the lithium-ion battery module increases, and the ion migration speed slows down, resulting in a significant decrease in ion conductivity. Therefore, the discharge capacity at low temperatures is very poor. If it is located in a cold region, it is easy for the lithium-ion battery module to fail to reach the temperature and the car cannot be started. Therefore, a heating structure is needed.

[0003] For example, a lithium-ion battery module heating structure disclosed in application number 201710077031.0 provides a method of using electric heating wire to heat the air blown into the gas circulation machine, thereby heating the internal battery cells, so that it can work normally in cold regions. The optimal operating temperature of lithium-ion battery modules in cold regions is usually between 20°C and 35°C. However, there are some challenges in achieving this optimal temperature range in cold regions. The above patent only heats the lithium-ion battery module when it is started, and directly heats all the battery cells. However, due to the position of the battery cells, the battery cells are distributed side by side, so the contact area between the external battery cells and the box (external environment) is increased, and the contact area between the internal battery cells and the box (external environment) is small. It is known that when a car is used frequently in practice, the rest time of the car is different, resulting in that when the car is started after resting, the battery cells inside have better thermal insulation than the battery cells outside, and the rest time is inversely proportional to the temperature of the battery cells after the environment cools down. Therefore, the subsequent heating amount required for the battery cells inside is less than the heating amount required for the battery cells outside, that is, the distance of the battery cells from the box (external environment) is inversely proportional to the required heating amount. The above-mentioned patent states the structural features of the above-mentioned patent, that is, the holes are of the same size, the heating efficiency at each position is the same, and the heating amount of the battery cells at each position is the same, resulting in uneven heating of the battery cells at each position, and no targeted design is made for the above-mentioned application scenarios. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a fast-charging lithium-ion battery module heating structure, which can effectively solve the problems of uneven heating of the lithium-ion battery module and the inability to continuously heat the battery module during driving in the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a fast-charging lithium-ion battery module heating structure, comprising a battery box body, a bottom plate fixedly connected to the inside of the battery box body, a plurality of battery cells arranged above the bottom plate, heat conducting plates arranged on both sides of the plurality of battery cells, partitions arranged on the sides of every two heat conducting plates, a box cover arranged on the top of the battery box body, a plurality of air inlet holes opened inside the bottom plate and the partition, and an auxiliary heating structure and a start-up heating structure arranged at the bottom of the battery box body;

[0007] The auxiliary heating structure includes a box body fixedly connected to the top of the box cover, a fixed block and an electromagnetic block 2 corresponding to the position of the battery cell are arranged at the top of the box cover and located inside the box body, a sliding rod is fixedly connected to the side where the fixed block and the electromagnetic block 2 are close to each other, a magnetic plate, an electromagnetic block 1 and a magnetic block are respectively arranged on the outside of the sliding rod, a sliding groove is opened at the top of the box cover and above each partition, a connecting rod is fixedly connected to the top of the partition, the connecting rod is slidably connected to the sliding groove, the connecting rod is fixedly connected to the magnetic plate, a spring is arranged on the outside of the sliding rod, the spring is sleeved on the outside of the sliding rod and fixed to the electromagnetic block 2 and the magnetic block at both ends, a pushing device is fixedly connected to the top of the fixed block, an insulating block is fixedly connected to the top of the electromagnetic block 1, a controller is arranged at the top of the box cover and located inside the box body, a contact switch is arranged on the outside of the pushing device, the contact switch is electrically connected to the controller and the electromagnetic block 1, the electromagnetic block 2 and the magnetic block are arranged to attract each other, the magnetic block and the electromagnetic block 1 are arranged to repel each other, and the magnetic plate and the electromagnetic block 1 are arranged to repel each other.

[0008] The present invention provides a fast-charging lithium-ion battery module heating structure. Preferably, the auxiliary heating structure is located inside the battery box body and on the top of the box cover, a temperature sensor is provided at the bottom of the box cover and above the battery cell, and the temperature sensor is electrically connected to a controller, a filtering structure is provided on one side of the battery box body, and an inflation structure is provided inside the battery box body and on the side of the single cell.

[0009] Preferably, the inflation structure includes an inflatable airbag arranged on the side where the side wall of the battery box body and the partition are close to each other, a fixed airbag is arranged on the side where the side wall of the battery box body and close to the battery cell, an air inlet pipe is fixedly connected to the side where the fixed airbag and the inflatable airbag are close to each other, an air outlet pipe is fixedly connected to one side of the fixed airbag, one end of the air outlet pipe extends to the outside of the battery box body, and the diameter of the air inlet pipe is larger than the diameter of the air outlet pipe.

[0010] Preferably, the filtering structure includes a filtering shell fixedly connected to the outside of the battery box body and connected to the delivery pipe, one side of the filtering shell is fixedly connected with a connector, the interior of the filtering shell is detachably provided with an activated carbon filter plate and a three-way catalytic converter, the interior of the delivery pipe is provided with an electromagnetic flow valve, and the electromagnetic flow valve is electrically connected to the controller.

[0011] Preferably, the starting heating structure includes a delivery pipe which is inside the battery box body and fixedly connected below the bottom plate, one end of the delivery pipe extends to the outside of the battery box body, the top of the delivery pipe is fixedly connected to two symmetrical connecting pipes, the bottom of the bottom plate is fixedly connected to a connecting box which is fixedly connected to the two connecting pipes, the outside of the delivery pipe is fixedly connected to an external pipe, one end of the external pipe extends to the outside of the battery box body and is fixedly connected to a gas circulation machine, a PTC heater is provided inside the delivery pipe and is electrically connected to a controller, the output end of the gas circulation machine is connected to a pipeline, the other end of the pipeline is connected to the battery box body, and an inert gas is provided inside the gas circulation machine.

[0012] Preferably, the side wall of the battery box body is provided with a groove which is slidably connected to the partition.

[0013] Preferably, the diameters of the exhaust holes opened inside the plurality of partitions decrease sequentially from the outside to the inside.

[0014] Preferably, the pushing device is composed of a motor, a turntable, a clamping column, a limit frame, a push rod and a limit block. The motor is fixedly connected to the top of the box cover, the output end of the motor is fixedly connected to the turntable, a clamping column is provided at the eccentric position of the turntable, a limit frame is provided on the outer side of the clamping column, a push rod is fixedly connected to one side of the limit frame, the top of one of the fixed blocks is fixedly connected to the limit block, the push rod is slidably connected to the limit block, and the motor is electrically connected to the controller.

[0015] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0016] 1. When in use, the temperature sensor transmits an electrical signal to the controller, and the controller controls the pushing device to push the electromagnetic block 1 to slide to the position of the contact switch to start the electromagnetic block 1. The electromagnetic block 1 can generate a magnetic repulsive force to push the magnetic plate, so that the magnetic plate squeezes the spring on one side of the magnetic block, and the spring pushes the connecting rod through the rebound of the spring, thereby driving the partition to slide repeatedly through the connecting rod, and generating heat by friction with the heat conducting plate, which can be transferred to the battery cell through the heat conducting plate. The temperature of the internal and external battery cells is detected in advance by the temperature sensor. When the temperature of the battery cells is inconsistent, the electromagnetic block 2 is controlled to attract the spring, and the current of the electromagnetic block 2 is controlled to make the electromagnetic block 2 attract the spring, so that the compression of the spring becomes larger or smaller and the rebound effect is different, so that the frequency of the friction of the partition is inconsistent, so that the temperature of the internal and external battery cells can be kept consistent and uniform.

[0017] 2. When the partition slides repeatedly, the inflatable airbag is continuously squeezed to allow the generated gas to be transported into the interior of the fixed airbag through the intake pipe, thereby causing the fixed airbag to swell, effectively avoiding the offsetting or weakening of the stress on the battery cell during the sliding of the partition. In addition, during driving, part of the exhaust gas is intercepted and enters the interior of the filter housing through the connector. The activated carbon filter plate and the three-way catalytic converter filter the exhaust gas, thereby activating the electromagnetic flow valve to enter the interior of the battery box. After being transported into the position of the battery cell, the battery cell can be heated during driving. The internal battery cell temperature is detected by a temperature sensor, and the heat flow is controlled by the electromagnetic flow valve, so that the battery cell is continuously maintained at the optimal operating temperature during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 The cross-sectional view of the present invention Figure 1 ;

[0021] Figure 3 The cross-sectional view of the present invention Figure 2 ;

[0022] Figure 4 The cross-sectional view of the present invention Figure 3 ;

[0023] Figure 5 It is a schematic diagram of the bottom plate structure of the present invention;

[0024] Figure 6 It is a side view of the startup heating structure of the present invention;

[0025] Figure 7 is a side view of the inflatable structure of the present invention;

[0026] Figure 8 For the present invention Figure 2 Enlarged view of point A in the middle;

[0027] Fig. 9 It is a side view of the auxiliary heating structure of the present invention.

[0028] Reference numerals: 1, battery box body; 2, box cover; 4, auxiliary heating structure; 401, box body; 403, fixing block; 404, electromagnetic block 1; 405, slide groove; 406, spring; 407, electromagnetic block 2; 408, magnetic plate; 409, controller; 410, connecting rod; 411, contact switch; 412, insulating block; 413, pushing device; 414, sliding rod; 415, magnetic block; 6, start heating structure; 601, conveying pipe; 602, connecting box; 603, external pipe; 604, connecting pipe; 605, gas circulation machine; 7, filtering structure; 701, electromagnetic flow valve; 702, activated carbon filter plate; 703, filter housing; 704, connector; 705, three-way catalytic converter; 8, partition; 9, inflation structure; 901, fixed airbag; 902, inflatable airbag; 903, air inlet pipe; 904, air outlet pipe; 10, bottom plate; 11, temperature sensor; 12, battery cell; 13, groove; 14, heat conduction plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0030] The present invention will be further described below in conjunction with the embodiments.

[0031] Example: Refer to Figures 1 to 9A fast-charging lithium-ion battery module heating structure includes a battery box body 1, a bottom plate 10 is fixedly connected to the inside of the battery box body 1, a plurality of battery cells 12 are arranged above the bottom plate 10, heat conducting plates 14 are arranged on both sides of the plurality of battery cells 12, and a partition 8 is arranged on the sides of each of the two heat conducting plates 14, a box cover 2 is arranged on the top of the battery box body 1, a plurality of air inlet holes are opened inside the bottom plate 10 and the partition 8, and an auxiliary heating structure 4 and a start-up heating structure 6 arranged at the bottom of the battery box body 1;

[0032] The auxiliary heating structure 4 includes a box body 401 fixedly connected to the top of the box cover 2, a fixed block 403 and an electromagnetic block 407 corresponding to the position of the battery cell 12 are arranged at the top of the box cover 2 and inside the box body 401, a sliding rod 414 is fixedly connected to the side where the fixed block 403 and the electromagnetic block 407 are close to each other, and a magnetic plate 408, an electromagnetic block 404 and a magnetic block 415 are respectively arranged on the outside of the sliding rod 414, a sliding groove 405 is opened on the top of the box cover 2 and above each partition 8, a connecting rod 410 is fixedly connected to the top of the partition 8, the connecting rod 410 is slidably connected to the sliding groove 405, the connecting rod 410 is fixedly connected to the magnetic plate 408, a spring 406 is arranged on the outside of the sliding rod 414, and the spring 4 06 is sleeved on the outside of the slide bar 414 and its two ends are fixed to the electromagnetic block 407 and the magnetic block 415. The top of the fixed block 403 is fixedly connected with a pushing device 413, and the top of the electromagnetic block 404 is fixedly connected with an insulating block 412. The top of the box cover 2 and the inside of the box body 401 are provided with a controller 409. The outside of the pushing device 413 is provided with a contact switch 411. The contact switch 411 is electrically connected to the controller 409 and the electromagnetic block 404. The electromagnetic block 407 and the magnetic block 415 are arranged to attract each other, the magnetic block 415 and the electromagnetic block 404 are arranged to repel each other, and the magnetic plate 408 and the electromagnetic block 404 are arranged to repel each other. The internal temperature is detected by the temperature sensor 11, and the electrical signal is transmitted to the controller 409, that is, The electromagnetic block 404 can be pushed to slide to the position of the contact switch 411 by starting the pushing device 413. At this time, the current transmitted by the controller 409 is located at the electromagnetic block 2 407 and the contact switch 411. The current transmitted by the contact switch 411 starts the electromagnetic block 404 to generate a magnetic force, so that the electromagnetic block 404 and the magnetic plate 408 are on the repelling side to generate a magnetic force, and the magnetic plate 408 and the connecting rod 410 are pushed to squeeze the spring 406. The spring 406 rebounds to push the connecting rod 410 and the magnetic plate 408 back to their original positions, and the partition 8 can be driven to slide repeatedly through the connection of the connecting rod 410 and continuously rub the heat conducting plate 14 to generate heat, and the heat is conducted through the heat conducting plate 14 so that the heat acts on the electric The diaphragm of the battery cell 12, when the temperature sensor 11 detects that the temperatures of the internal and external battery cells 12 are inconsistent, the controller 409 transmits current to control the electromagnetic block 407, so that the electromagnetic block 407 attracts the magnetic block 415, and adjusts the compression of the spring 406. The temperature sensor 11 detects the temperatures of the internal and external battery cells 12. When the temperatures of the battery cells 12 are inconsistent, the electromagnetic block 407 is controlled to attract the spring, and the current of the electromagnetic block 407 is controlled, so that the electromagnetic block 407 attracts the spring, so that the compression of the spring 406 increases or decreases and the rebound effect is different, so that the frequency of friction of the partition 8 is inconsistent, so that the temperature of the internal and external battery cells 12 can be kept consistent and uniform.

[0033] The auxiliary heating structure 4 is located inside the battery box body 1 and on the top of the box cover 2. A temperature sensor 11 is arranged at the bottom of the box cover 2 and above the battery cell 12. The temperature sensor 11 is electrically connected to the controller 409. A filtering structure 7 is arranged on one side of the battery box body 1. An inflation structure 9 is arranged inside the battery box body 1 and on the side of the single battery.

[0034] The inflatable structure 9 includes an inflatable airbag 902 disposed on the side of the battery box body 1 where the side wall and the partition 8 are close to each other, a fixed airbag 901 is disposed on the side of the battery box body 1 and close to the battery cell 12, an air inlet pipe 903 is fixedly connected to the side where the fixed airbag 901 and the inflatable airbag 902 are close to each other, and an air outlet pipe 904 is fixedly connected to one side of the fixed airbag 901, and one end of the air outlet pipe 904 extends to the outside of the battery box body 1. The diameter of the air inlet pipe 903 is larger than the diameter of the air outlet pipe 904. When the partition 8 slides and repeatedly inflates the inflatable airbag 902, The extrusion causes the gas continuously generated by the inflatable airbag 902 to be transported into the interior of the fixed airbag 901 through the air inlet pipe 903, thereby expanding the fixed airbag 901 and effectively preventing the stress generated when the partition 8 slides from affecting the surrounding components. The gas inside the fixed airbag 901 can be discharged through the air outlet pipe 904, but the diameter of the air inlet pipe 903 is larger than that of the air outlet pipe 904. During the inflation process, the fixed airbag 901 can always remain inflated through the difference in gas volume. When the partition 8 stops sliding, the gas can be discharged through the air outlet pipe 904.

[0035] The filtering structure 7 includes a filtering shell 703 fixedly connected to the outside of the battery box body 1 and connected to the delivery pipe 601. A connector 704 is fixedly connected to one side of the filtering shell 703. An activated carbon filter plate 702 and a three-way catalytic converter 705 are detachably provided inside the filtering shell 703. An electromagnetic flow valve 701 is provided inside the delivery pipe 601. The electromagnetic flow valve 701 is electrically connected to the controller 409. During driving, part of the exhaust gas is intercepted through the pipeline connected to the connector 704. After entering the interior of the filtering shell 703, the particles and harmful gases contained in the exhaust gas are filtered through the activated carbon filter plate 702 and the three-way catalytic converter 705, thereby effectively improving the utilization effect of heat and preventing particles and harmful gases from entering the interior and causing damage to the battery cell 12.

[0036] The start-up heating structure 6 includes a delivery pipe 601 that is fixedly connected inside the battery box body 1 and located below the bottom plate 10. One end of the delivery pipe 601 extends to the outside of the battery box body 1. The top of the delivery pipe 601 is fixedly connected to two symmetrical connecting pipes 604. The bottom of the bottom plate 10 is fixedly connected to a connecting box 602 that is fixedly connected to the two connecting pipes 604. The outside of the delivery pipe 601 is fixedly connected to an external pipe 603. One end of the external pipe 603 extends to the outside of the battery box body 1 and is fixedly connected to a gas circulation machine 605. A PTC heater is provided inside the delivery pipe 601 and is electrically connected to the controller 409. The output end of the gas circulation machine 605 is connected to a pipeline, and the other end of the pipeline is connected to the battery box body 1. The gas circulation machine 605 is provided with an inert gas inside. By starting the TPC heater in the heating structure 6 to heat the inert gas inside, the inert gas is transported into the inside of the delivery pipe 601 through the external pipe 603. At this time, the electromagnetic flow valve 701 remains in a closed state. The inert gas enters the inside of the connecting box 602 through the connecting pipe 604, reaches the top of the bottom plate 10 through the hole opened inside the bottom plate 10, and enters through the hole inside the partition 8, so that heat surrounds the battery cell 12. By starting the gas circulation machine 605, the inert gas is circulated to the PTC heater through the pipeline, so that the inert gas can be recycled. When the battery cell 12 is heated up and reaches the lower limit of the optimal working temperature, the car is started.

[0037] The side wall of the battery box body 1 is provided with a groove 13 which is slidably connected to the partition plate 8 .

[0038] The diameters of the exhaust holes opened inside the plurality of partitions 8 decrease from the outside to the inside, so that the heated inert gas can fully contact the battery cells 12 after entering the inside.

[0039] The pushing device 413 is composed of a motor, a turntable, a clamping column, a limit frame, a push rod, and a limit block. The motor is fixedly connected to the top of the box cover 2, and the output end of the motor is fixedly connected to the turntable. A clamping column is provided at the eccentric part of the turntable, and a limit frame is provided on the outer side of the clamping column. A push rod is fixedly connected to one side of the limit frame. The top of one of the fixed blocks 403 is fixedly connected to the limit block, and the push rod is slidably connected to the limit block. The motor is electrically connected to the controller 409. By starting the motor to drive the turntable to rotate, the clamping column is driven to push the limit frame, so that the push rod on one side of the limit frame slides inside the limit block, thereby pushing the insulating block 412.

[0040] The working principle of the present invention is as follows: when the car needs to be started, the TPC heater in the heating structure 6 is started to heat the internal inert gas, so that the inert gas is transported into the inside of the delivery pipe 601 through the external pipe 603. At this time, the electromagnetic flow valve 701 remains closed, and enters the inside of the connecting box 602 through the connecting pipe 604, so that it reaches the top of the bottom plate 10 through the hole opened inside the bottom plate 10, and enters through the hole inside the partition 8, so that the heat surrounds the battery cell 12, and the inert gas is circulated to the PTC heater through the pipeline by starting the gas circulation machine 605 to circulate the inert gas. When the battery cell 12 reaches the lower limit of the optimal working temperature after the temperature rises, the car is started, and the car can be heated up during driving to maintain the optimal working temperature range;

[0041] By detecting the temperature of each battery cell 12 through the temperature sensor 11 and transmitting an electrical signal to the controller 409, the motor in the pushing device 413 can be started to drive the turntable to rotate, thereby driving the card column to push the limit frame, so that the push rod on one side of the limit frame slides inside the limit block, thereby pushing the insulating block 412, driving the electromagnetic block 404 to slide to the position of the contact switch 411, and then starting the contact switch 411 through the controller 409 to start the electromagnetic block 404 to generate a magnetic force, so that the electromagnetic block 404 and the magnetic plate 408 are repelling each other and generate a magnetic force, pushing The magnetic plate 408 and the connecting rod 410 squeeze the spring 406, and the spring 406 rebounds to push the connecting rod 410 and the magnetic plate 408 back to their original positions, so that the partition 8 can be driven to slide repeatedly through the connection of the connecting rod 410 and continuously rub the heat conducting plate 14 to generate heat, and the heat is conducted through the heat conducting plate 14 to act on the battery cell 12. When the car is parked for a long time, the internal temperature drops, so that the temperatures of the inner and outer battery cells 12 are kept consistent. At this time, there is no need to adjust the compression amount of the spring 406, and the pushing device 413 can be directly started by the controller 409 to drive it;

[0042] When the temperature sensor 11 detects that the temperatures of the battery cells 12 on the inside and outside are inconsistent, an electrical signal is output to the controller 409, and the controller 409 transmits different current intensities to control the electromagnetic intensity of the electromagnetic block 2 407 to increase or decrease, so that the electromagnetic block 2 407 attracts the magnetic block 415 more or less, so that the magnetic block 415 squeezes the spring 406, and the compression amount of the spring 406 is increased or decreased, so that the compression amount of the spring 406 increases or decreases, resulting in different rebound effects, thereby making the frequencies of the multiple partitions 8 returning to their original positions inconsistent, so that the temperatures of the battery cells 12 on the inside and outside are kept consistent and uniform;

[0043] When the partition 8 slides, the inflatable airbag 902 is repeatedly squeezed, so that the inflatable airbag 902 continuously generates gas that is transported into the interior of the fixed airbag 901 through the air inlet pipe 903, thereby expanding the fixed airbag 901, and the gas inside the fixed airbag 901 can be discharged through the air outlet pipe 904. However, the diameter of the air inlet pipe 903 is larger than the air outlet pipe 904, so that during the inflation process, the fixed airbag 901 can always be kept in an inflated state through the gas volume difference. When the sliding of the partition 8 is finished, the gas can be discharged through the air outlet pipe 904, effectively avoiding the stress generated when the partition 8 slides to damage the surrounding parts. The stress generated by repeated sliding can easily affect the surrounding parts and cause problems such as distortion and deformation, which can easily affect the service life. The surrounding parts are effectively protected by the fixed airbag 901, and the influence of stress is reduced.

[0044] Regardless of whether the number of partitions 8 is an even number or an odd number, multiple pairs are formed by fixing every two corresponding partitions 8 from the outside to the inside, so that the corresponding partitions 8 from the outside to the inside slide at different frequencies, and the sliding frequencies of multiple partitions 8 can be adjusted according to the electrical signals detected by the temperature sensor 11.

[0045] When driving, part of the exhaust gas is intercepted through the pipe connected to the connector 704, and after entering the interior of the filter housing 703, the particles and harmful gases contained in the exhaust gas are filtered through the activated carbon filter plate 702 and the three-way catalytic converter 705, and then enter the interior of the delivery pipe 601 by opening the electromagnetic flow valve 701, and then enter the top of the bottom plate 10 through the connecting pipe 604 and the connecting box 602, and dissipate heat through the holes inside the partition 8, so as to heat the battery cell 12, and detect the temperature of the battery cell 12 inside and outside through the temperature sensor 11. When the temperature is too high, the flow rate is reduced by starting the electromagnetic flow valve 701, so that less heat enters. When the temperature is low, the electromagnetic flow valve 701 is started again to increase the flow rate to increase the temperature of the battery cell 12.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fast-charging lithium-ion battery module heating structure, characterized in that: The battery box (1) comprises a battery box body (1), wherein a bottom plate (10) is fixedly connected to the inside of the battery box body (1), a plurality of battery cells (12) are arranged above the bottom plate (10), heat conducting plates (14) are arranged on both sides of the plurality of battery cells (12), a partition plate (8) is arranged on the sides of every two heat conducting plates (14), a box cover (2) is arranged on the top of the battery box body (1), and a plurality of air inlet holes are opened inside the bottom plate (10) and the partition plate (8), and is characterized in that it also comprises an auxiliary heating structure (4) and a start-up heating structure (6) arranged at the bottom of the battery box body (1); The auxiliary heating structure (4) comprises a box body (401) fixedly connected to the top of the box cover (2); a fixed block (403) and an electromagnetic block 2 (407) corresponding to the position of the battery cell (12) are arranged at the top of the box cover (2) and inside the box body (401); a sliding rod (414) is fixedly connected to the side of the fixed block (403) and the electromagnetic block 2 (407) close to each other; a magnetic plate (408), an electromagnetic block 1 (404) and a magnetic block (415) are respectively arranged on the outside of the sliding rod (414); a sliding groove (405) is opened at the top of the box cover (2) and above each partition (8); a connecting rod (410) is fixedly connected to the top of the partition (8); the connecting rod (410) is slidably connected to the sliding groove (405), the connecting rod (410) is fixedly connected to the magnetic plate (408), and the sliding rod (414) is fixedly connected to the magnetic plate (408). 4) is provided with a spring (406), the spring (406) is sleeved on the outside of the sliding rod (414) and its two ends are fixed to the second electromagnetic block (407) and the magnetic block (415), the top of the fixed block (403) is fixedly connected to a pushing device (413), the top of the electromagnetic block (404) is fixedly connected to an insulating block (412), a controller (409) is provided at the top of the box cover (2) and inside the box body (401), a contact switch (411) is provided on the outside of the pushing device (413), the contact switch (411) is electrically connected to the controller (409) and the first electromagnetic block (404), the second electromagnetic block (407) and the magnetic block (415) are arranged to attract each other, the magnetic block (415) and the first electromagnetic block (404) are arranged to repel each other, and the magnetic plate (408) and the first electromagnetic block (404) are arranged to repel each other; The auxiliary heating structure (4) is located inside the battery box body (1) and on the top of the box cover (2); a temperature sensor (11) is provided at the bottom of the box cover (2) and above the battery cell (12); the temperature sensor (11) is electrically connected to the controller (409).

2. A fast-charging lithium-ion battery module heating structure according to claim 1, characterized in that: A filtering structure (7) is provided on one side of the battery box body (1), and an inflation structure (9) is provided inside the battery box body (1) and on the side of the single battery.

3. A fast-charging lithium-ion battery module heating structure according to claim 2, characterized in that: The inflation structure (9) comprises an inflation airbag (902) provided on a side of the battery case (1) where the side wall and the partition (8) are close to each other, a fixed airbag (901) provided on a side of the battery case (1) where the side wall is close to the battery cell (12), an air inlet pipe (903) fixedly connected to a side where the fixed airbag (901) and the inflation airbag (902) are close to each other, an air outlet pipe (904) fixedly connected to one side of the fixed airbag (901), one end of the air outlet pipe (904) extending to the outside of the battery case (1), and a diameter of the air inlet pipe (903) being greater than a diameter of the air outlet pipe (904).

4. A fast-charging lithium-ion battery module heating structure according to claim 2, characterized in that: The filtering structure (7) comprises a filtering housing (703) fixedly connected to the outside of the battery box (1) and connected to the delivery pipe (601); a connector (704) is fixedly connected to one side of the filtering housing (703); an activated carbon filter plate (702) and a three-way catalytic converter (705) are detachably arranged inside the filtering housing (703); an electromagnetic flow valve (701) is arranged inside the delivery pipe (601); and the electromagnetic flow valve (701) is electrically connected to the controller (409).

5. The fast-charging lithium-ion battery module heating structure according to claim 1, characterized in that: The startup heating structure (6) comprises a delivery pipe (601) fixedly connected inside the battery box (1) and located below the bottom plate (10), one end of the delivery pipe (601) extending to the outside of the battery box (1), the top of the delivery pipe (601) being fixedly connected to two symmetrical connecting pipes (604), the bottom of the bottom plate (10) being fixedly connected to a connecting box (602) fixedly connected to the two connecting pipes (604), the outside of the delivery pipe (601) being fixedly connected to an external pipe (603), one end of the external pipe (603) extending to the outside of the battery box (1) and fixedly connected to a gas circulation machine (605), a PTC heater being arranged inside the delivery pipe (601) and being electrically connected to a controller (409), an output end of the gas circulation machine (605) being connected to a pipeline, the other end of the pipeline being connected to the battery box (1), and an inert gas being arranged inside the gas circulation machine (605).

6. A fast-charging lithium-ion battery module heating structure according to claim 2, characterized in that: The side wall of the battery box body (1) is provided with a groove (13) which is slidably connected to the partition plate (8).

7. A fast-charging lithium-ion battery module heating structure according to claim 1, characterized in that: The diameters of the exhaust holes opened inside the plurality of partitions (8) decrease sequentially from the outside to the inside.

8. A fast-charging lithium-ion battery module heating structure according to claim 2, characterized in that: The pushing device (413) is composed of a motor, a turntable, a clamping column, a limit frame, a push rod, and a limit block. The motor is fixedly connected to the top of the box cover (2), the output end of the motor is fixedly connected to the turntable, a clamping column is provided at the eccentric position of the turntable, a limit frame is provided on the outer side of the clamping column, and a push rod is fixedly connected to one side of the limit frame. The top of one of the fixed blocks (403) is fixedly connected to the limit block, the push rod is slidably connected to the limit block, and the motor is electrically connected to the controller (409).

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