Intermittent Charging Type Lithium Battery Parallel Power Supply Device

Abstract

The present invention relates to the technical field of lithium battery charging devices, specifically an intermittent charging type lithium battery parallel power supply device, which includes a power supply compartment. Inside the power supply compartment, there are multiple battery cells for energy storage. A top cover is fixedly installed at the upper end of the power supply compartment. An end of the top cover is provided with a current stabilizing device to prevent the temperature of the battery cells from being too high. A heat conducting plate is fixedly installed at an end of the power supply compartment, and the heat conducting plate is in close contact with the battery cells. A circuit control module capable of providing a stable power supply is fixedly installed at an end of the top cover. When the temperature of one of the battery cells is on the high side, the current of the current battery cell is reduced according to the current temperature, and at the same time, the current of the remaining battery cells can be stabilized, avoiding thermal runaway caused by too high temperature, significantly improving the safety of the operation of the battery pack, thereby reducing the heat generation of the high-temperature battery cells and reducing the pressure on the heat dissipation system, and indirectly improving the energy efficiency of the thermal management system.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery charging devices, and specifically to an intermittent charging type lithium battery parallel power supply device. Background Art

[0002] As an efficient and environmentally friendly secondary battery, rechargeable lithium batteries are widely used in consumer electronic devices, electric vehicles, energy storage systems, and aerospace fields due to their high energy density, long cycle life, low self-discharge rate, and light weight. With the increasing demand for portability, high energy efficiency, and green energy in modern society, the market scale and technical level of lithium batteries are both continuously improving.

[0003] After retrieval, it is found that the prior art publication number CN113595171A discloses an outdoor power supply that can be quickly charged, including a power supply body and a fast charging adapter. A fast charging adapter and a lithium battery pack are arranged inside the power supply body. A plug-in charging port is arranged at the input end of the fast charging adapter. A voltage stabilizing and variable voltage charging protection circuit is arranged inside the fast charging adapter. The lithium battery pack is composed of 3 or more single lithium battery cores connected in parallel. Each single lithium battery core is provided with a single-cell charging protection circuit. The output end of the fast charging adapter is connected in parallel with each single-cell charging protection circuit. The lithium battery pack is also provided with a discharge protection circuit. The output end of the discharge protection circuit is connected to an external power supply port. An LED display screen is arranged on the power supply body, and the LED display screen is connected to the output end of the voltage stabilizing and variable voltage charging protection circuit; the outdoor power supply of this solution can adjust the charging power in real time according to the battery level of the lithium battery pack to achieve the purpose of fast charging, and while achieving fast charging, it protects the lithium battery from being damaged by high voltage.

[0004] Therefore, based on the above retrieval and combined with the existing technology, when the above solution is used, especially when used outdoors in hot summer, continuous high temperature will exacerbate the decomposition of active substances inside the battery, resulting in an irreversible decrease in capacity and a significant shortening of the battery life. At the same time, overheating will cause voltage fluctuations or current instability in the battery, thus affecting the output performance of the power supply device. At the same time, it may also cause internal short circuits or abnormal increases in current, damaging the entire circuit system. For this reason, we propose an intermittent charging type lithium battery parallel power supply device. Summary of the Invention

[0005] The purpose of the present invention is to provide an intermittent charging type lithium battery parallel power supply device to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solutions: an intermittent charging type lithium battery parallel power supply device, including a power supply bin, wherein a plurality of energy storage cells are arranged inside the power supply bin, an upper cover is fixedly installed at the upper end of the power supply bin, a current stabilizing device for preventing the temperature of the cells from being too high is arranged at the inner end of the upper cover, a heat conducting plate is fixedly installed at the inner end of the power supply bin, the heat conducting plate is in close contact with the cells, a central tube penetrates through the inner end of the heat conducting plate, and two heat conducting bins are fixedly connected to the outer surface of the central tube, the two heat conducting bins are in close contact with the heat conducting plate, a plurality of bimetallic sheets capable of deforming with temperature are arranged inside the two heat conducting bins, the bimetallic sheets are respectively attached to the front and rear ends inside the heat conducting bins, and a circuit control module capable of providing a stable power supply is fixedly installed at the inner end of the upper cover.

[0007] As a further scheme of the present invention, a central rod is rotatably installed at the inner end of the central tube, a bimetallic spiral sheet is sleeved on the outer surface of the central tube, a dial rod is rotatably installed at the center of the bimetallic sheet, a plurality of transmission rods are rotatably installed at the inner bottom end of the heat conducting bin, and one end of the dial rod far from the bimetallic sheet is sleeved on the outer surface of the transmission rod.

[0008] As a further scheme of the present invention, an annular elastic sheet is fixedly installed at the inner end of the dial rod, a triangular block is fixedly installed at the inner end of the annular elastic sheet, a clamping groove is formed on the outer surface of the transmission rod, the triangular block is embedded in the clamping groove, and after the bimetallic sheet is heated and deformed, it pushes the dial rod, and then drives the transmission rod to rotate under the action of the triangular block and the clamping groove.

[0009] As a further scheme of the present invention, the current stabilizing device includes a temperature control bin, the temperature control bin is fixedly installed at the upper end of the upper cover, the interior of the temperature control bin is divided into two chambers, a rotating block is rotatably installed in each chamber, two conducting sheets are fixedly installed at the inner end of the temperature control bin, and a sliding bottom plate is fixedly installed at the inner end of the temperature control bin.

[0010] As a further scheme of the present invention, the right end of the rotating block is in contact with the left end of the conducting sheet, the right end of the rotating block is arc-shaped, so that the conducting sheet is extruded into an arc shape after being in contact, a resistance value sheet is fixedly installed at the left end of the rotating block, a rectangular groove is formed on the outer surface of the conducting sheet, and the resistance value sheet penetrates through the rectangular groove and is in contact with the outer surface of the conducting sheet.

[0011] As a further scheme of the present invention, a conductive sleeve is fixedly installed at the upper end of the sliding bottom plate, a passive plate is slidably installed at the right end of the sliding bottom plate, and a contact rod is fixedly connected to the left end of the passive plate. A plurality of clamping pieces capable of clamping the contact rod are fixedly installed at one end of the conductive sleeve close to the passive plate. The clamping pieces are arranged in a ring shape. The plurality of clamping pieces arranged in a ring shape can evenly distribute the pressure and firmly clamp the contact rod to ensure stable circuit connection and avoid problems such as poor contact or circuit interruption caused by loosening.

[0012] As a further solution of the present invention, a traction rod is slidably mounted on the upper end of the sliding bottom plate. A push rod is inserted through the inner end of the conductive sleeve. The push rod corresponds to the contact rod, and the traction rod is fixedly connected to the push rod. A locking rod is arranged on the upper end of the sliding bottom plate. A clamping groove is formed on the outer surface of the traction rod. The left end of the locking rod abuts against the inside of the clamping groove. A sliding block is slidably mounted on the upper end of the sliding bottom plate. The sliding block corresponds to the traction rod, and a traction spring is connected between the sliding block and the traction rod.

[0013] As a further solution of the present invention, a driven gear is rotatably mounted on the upper end of the sliding bottom plate. The driven gear is fixedly connected to the right end of the locking rod. A driving rack is fixedly mounted at one end of the sliding block close to or away from the contact rod. After the sliding block moves to the position of the driven gear, the driving rack meshes with the driven gear. Subsequently, the locking rod rotates, and the left end will disengage from the clamping groove on the outer surface of the traction rod. When the sliding block moves to the position of the driven gear, the driving rack meshes with the driven gear. Through gear transmission, the automatic rotation of the locking rod can be realized, so as to disengage from the clamping groove of the traction rod, without manual operation, simplifying the unlocking process and improving the operation convenience and efficiency.

[0014] As a further solution of the present invention, a central chamber is fixedly mounted on the upper end of the upper cover. A pressure-sensitive metal sheet capable of changing the resistance through the change of the shape is fixedly mounted inside the central chamber. The central tube corresponds to the pressure-sensitive metal sheet, and a sliding frame is slidably mounted inside the central tube. The sliding frame is sleeved on the outer surface of the central rod.

[0015] As a further solution of the present invention, a driven rod is rotatably mounted at the inner end of the sliding frame. A threaded rod is fixedly mounted at the upper end of the driven rod. A sleeve is slidably mounted inside the sliding frame. The sleeve is threadedly sleeved on the outer surface of the threaded rod. The driven rod passes through the inner end of the central rod. A push block is fixedly mounted at the upper end of the sleeve. The upper end of the push block is attached to the bottom end of the pressure-sensitive metal sheet.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. When the present invention is in use, when the temperature of one of the battery cells is too high, the current of the current battery cell is reduced according to the current temperature, and at the same time, the current of the remaining battery cells can be stabilized, avoiding thermal runaway caused by too high temperature, significantly improving the safety of the battery pack operation, thereby reducing the heat generation of the high-temperature battery cell and reducing the pressure on the heat dissipation system, and indirectly improving the energy efficiency of the thermal management system.

[0018] 2. When the present invention is in use, when the temperature of the battery cell is too high, the pressure-sensitive metal sheet is then squeezed to increase its resistance, reducing the current of the overall circuit, and finally power supply is stopped. After the power supply is stopped, the battery cell enters a non-operating state, heat generation stops, which helps the overheated battery cell to quickly return to normal temperature, effectively restricting the spread of heat to other battery cells or surrounding components, and ensuring the overall temperature balance of the battery pack;

[0019] 3. The present invention has two pole pieces that can either be directly inserted into a socket or connected to a modular power supply group, and can cooperate with multiple battery cells to form a charging and discharging device with a larger capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of an intermittent charging type lithium battery parallel power supply device;

[0021] Figure 2 It is an exploded view of an intermittent charging type lithium battery parallel power supply device;

[0022] Figure 3 It is a schematic structural diagram of a heat conduction chamber and a central tube;

[0023] Figure 4 It is a schematic structural diagram of the interior of a heat conduction chamber and a central tube;

[0024] Figure 5 It is an exploded structural schematic diagram of a lever and a transmission rod;

[0025] Figure 6 It is a schematic structural diagram of the interior of an upper cover;

[0026] Figure 7 It is a schematic structural diagram of the interior of an adjustment chamber;

[0027] Figure 8 It is a schematic structural diagram of the interior of a temperature control chamber;

[0028] Figure 9 It is a schematic structural diagram of a rotating block and a conduction sheet;

[0029] Figure 10 It is a schematic structural diagram above a sliding bottom plate;

[0030] Figure 11 It is a schematic structural diagram of the interior of a central chamber.

[0031] In the figure: 1. Power supply chamber; 2. Upper cover; 3. Battery cell; 4. Heat conduction plate; 11. Return torsion spring;

[0032] 101. Heat conduction chamber; 102. Central tube; 103. Transmission rod; 104. Bimetallic spiral sheet; 105. Central rod; 106. Lever; 107. Bimetallic sheet; 108. Triangular block; 109. Card slot; 110. Ring-shaped elastic sheet;

[0033] 201, Central warehouse; 202, Pressure-sensitive metal sheet; 203, Pushing block; 204, Sleeve; 205, Threaded rod; 206, Passive rod; 207, Sliding frame;

[0034] 301, Adjustment compartment; 302, Helix; 303, Magnetic rod; 304, Resistance rod; 305, Support block;

[0035] 401, Temperature control compartment; 402, Conductive sheet; 403, Rotating block; 404, Sliding bottom plate; 405, Contact rod; 406, Conductive sleeve; 407, Resistance sheet; 408, Guide rod; 409, Traction wire; 410, Pushing rod; 411, Clip; 412, Abutting spring; 413, Passive plate; 414, Reset spring; 415, Sliding block; 416, Passive gear; 417, Traction spring; 418, Locking rod; 419, Traction rod. Detailed implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Example 1: Please refer to Figures 1-4, an intermittent charging type lithium - ion parallel power supply device, including a power supply compartment 1. Inside the power supply compartment 1, there are multiple battery cells 3 for energy storage. At the upper end of the power supply compartment 1, an upper cover 2 is fixedly installed by bolts. Above the upper cover 2, two pole pieces are fixedly installed. These two pole pieces can either be directly inserted into a socket or connected to a modular power supply group, and cooperate with multiple battery cells 3 to form a charging and discharging device with a larger capacity. At the inner end of the upper cover 2, there is a current - stabilizing device to prevent the temperature of the battery cells 3 from being too high. Specifically, when the temperature of a certain battery cell 3 is too high, the current - stabilizing device can reduce the current of the current battery cell 3 to prevent the temperature of the battery cell 3 from rising further. Also, it can stabilize the current of the remaining battery cells 3 to prevent the remaining battery cells 3 from being overloaded due to current imbalance. At the inner end of the upper cover 2, a circuit control module that can provide a stable power supply is fixedly installed. And inside the circuit control module, a current detection module and a processing unit are integrated, which are mature existing technologies and will not be elaborated here. Its function is to output stable voltage and current. At the inner end of the power supply compartment 1, a heat - conducting plate 4 is fixedly installed by bolts. Between the heat - conducting plate 4 and the battery cells 3, they are closely attached through heat - conducting silicone grease. Inside the inner end of the heat - conducting plate 4, a central tube 102 is penetrated. And on the outer surface of the central tube 102, two heat - conducting chambers 101 are fixedly connected. Between the two heat - conducting chambers 101 and the heat - conducting plate 4, they are closely attached through heat - conducting silicone grease, thus maximizing the heat transfer efficiency. Inside the two heat - conducting chambers 101, there are multiple bimetallic strips 107 that can deform with temperature. The bimetallic strip 107 is composed of two metals with different thermal expansion coefficients bonded together. When heated, due to different thermal expansion coefficients, its appearance deforms. The bimetallic strips 107 are respectively attached to the front and rear ends inside the heat - conducting chamber 101, and the bimetallic strips 107 at the front and rear ends inside the heat - conducting chamber 101 are staggered with each other. Specifically, the left and right ends of the bimetallic strip 107 are slidably connected to the heat - conducting chamber 101, and the center is attached to the inner wall of the heat - conducting chamber 101, enabling the bimetallic strip 107 to deform normally after being heated. More specifically, the inside of the central tube 102 and the heat - conducting chamber 101 is filled with heat - conducting liquid, which submerges all the bimetallic strips 107 inside the heat - conducting chamber 101;

[0038] Please refer to Figure 2 - Figure 6 , at the inner end of the central tube 102, a central rod 105 is rotatably installed. A bimetallic spiral sheet 104 is sleeved on the outer surface of the central tube 102. The principle of the bimetallic spiral sheet 104 is the same as that of the bimetallic strip 107. The difference is that the bimetallic spiral sheet 104 starts to twist after being heated. Specifically, the upper end of the bimetallic spiral sheet 104 is fixedly connected to the outer surface of the central rod 105, and the bottom end is fixedly connected to the inner end of the central tube 102.

[0039] A dial rod 106 is rotatably installed at the center of the bimetal 107. A plurality of transmission rods 103 are rotatably installed at the inner bottom end of the heat conduction bin 101. Specifically, two transmission rods 103 are arranged inside each of the two heat conduction bins 101, and one end of the dial rod 106 away from the bimetal 107 is sleeved on the outer surface of the transmission rod 103. An annular elastic piece 110 is fixedly installed at the inner end of the dial rod 106. A triangular block 108 is fixedly installed at the inner end of the annular elastic piece 110. A clamping groove 109 is formed on the outer surface of the transmission rod 103. The triangular block 108 is embedded in the clamping groove 109. After the bimetal 107 is heated and deformed, it pushes the dial rod 106, and then drives the transmission rod 103 to rotate under the action of the triangular block 108 and the clamping groove 109;

[0040] The heat inside the heat conduction bin 101 is not uniform, so that the bimetal 107 is not uniformly deformed when heated. When any triangular block 108 drives the transmission rod 103 to rotate through the clamping groove 109, the clamping grooves 109 in other areas will squeeze the slope of the triangular block 108, so that the annular elastic piece 110 is compressed, avoiding possible conflicts during the rotation of the dial rod 106.

[0041] Embodiment 2: Please refer to Figures 6-8 , an intermittent charging type lithium battery parallel power supply device. Based on Embodiment 1, adjustment bins 301 are fixedly installed on the upper left and right sides of the upper cover 2. Two chambers are opened at the inner end of the adjustment bin 301. A plurality of support blocks 305 are fixedly installed in each chamber. A magnetic force rod 303 is passed through the inner end of the support block 305. A magnet is fixedly installed at the inner end of the rightmost support block 305. The polarity of the magnet close to the magnetic force rod 303 is the same as the polarity on the right side of the magnetic force rod 303, so as to realize that the magnetic force rod 303 always maintains a force towards the left. A spiral wire 302 is fixedly installed at the inner ends of two of the support blocks 305. The spiral wire 302 is made of copper and is sleeved on the periphery of the magnetic force rod 303. A resistance rod 304 is fixedly installed at the left end of the magnetic force rod 303 and passes through the leftmost support block 305. The leftmost support block 305 is made of copper. Then, when the resistance rod 304 slides inside the support block 305, the cross-sectional area of the current passing through the resistance rod 304 changes, realizing the change of the current resistance. Specifically, the left end of the spiral wire 302 is connected to the resistance rod 304 through a wire. When the current is too large, the current passes through the spiral wire 302 to generate an induced magnetic field, so that the magnetic force rod 303 moves to the right, making the resistance of the resistance rod 304 increase, playing a role in reducing the current passing through (Ohm's law: I = U / R);

[0042] The steady flow device includes a temperature control bin 401, which is fixedly installed at the upper end of the upper cover 2. The interior of the temperature control bin 401 is divided into two chambers. A rotating block 403 is rotatably installed in each chamber, and the upper end of the transmission rod 103 is fixedly connected to the rotating block 403 (not shown in the figure). A return torsion spring 11 is provided between the transmission rod 103 and the bottom end of the upper cover 2. Two conduction sheets 402 are fixedly installed at the inner end of the temperature control bin 401. The conduction sheets 402 are made of metal materials such as nickel-chromium alloy, anti-copper, iron-chromium aluminum alloy, etc., and have a certain resistance value themselves. A sliding bottom plate 404 is fixedly installed at the inner end of the temperature control bin 401;

[0043] such as Figure 1 , Figure 7 , Figure 9 As shown, the right end of the rotating block 403 is in contact with the left end of the conduction sheet 402. The right end of the rotating block 403 is arc-shaped, so that the conduction sheet 402 is extruded into an arc shape after fitting. A resistance sheet 407 is fixedly installed at the left end of the rotating block 403. A rectangular groove is provided on the outer surface of the conduction sheet 402, and the resistance sheet 407 is inserted into the rectangular groove and is in contact with the outer surface of the conduction sheet 402. The material of the resistance sheet 407 is the same as that of the conduction sheet 402. Specifically, chamfering is performed at the edge of the rectangular groove inside the conduction sheet 402 and at the edge of the resistance sheet 407 to make the rotation of the rotating block 403 smoother. More specifically, when the rotating block 403 rotates, the resistance sheet 407 also disengages from the rectangular groove, so that the cross-sectional area of the current passing through the conduction sheet 402 becomes smaller, and thus the resistance of the conduction sheet 402 becomes larger. The conduction sheet 402 is connected to the left support block 305 in the adjustment bin 301 through a wire.

[0044] A conductive sleeve 406 is fixedly installed at the upper end of the sliding bottom plate 404 through bolts. A passive plate 413 is slidably installed at the right end of the sliding bottom plate 404, and a contact rod 405 is fixedly connected to the left end of the passive plate 413. A plurality of clamping pieces 411 capable of clamping the contact rod 405 are fixedly installed at one end of the conductive sleeve 406 close to the passive plate 413. The clamping pieces 411 are arranged in a ring shape. Specifically, the contact rod 405, the clamping pieces 411, and the conductive sleeve 406 are all made of copper, while the passive plate 413 is made of an insulating endurance plate. More specifically, the left end of the contact rod 405 is spherical and has a diameter larger than the diameter of the contact rod 405 itself, so as to facilitate the clamping of the clamping pieces 411. The contact rod 405 is slidably connected to the sliding bottom plate 404. A contact spring 412 is provided between the passive plate 413 and the sliding bottom plate 404. The contact rod 405 is connected to the conduction sheet 402 through a wire;

[0045] The upper end of the sliding bottom plate 404 is slidably installed with a towing rod 419. The towing rod 419 is made of insulating material, such as endurance plate. The endurance plate has characteristics such as high impact resistance, high temperature resistance, and firmness. The inner end of the conductive sleeve 406 is penetrated by a push rod 410. The push rod 410 corresponds to the contact rod 405, and the towing rod 419 is fixedly connected to the push rod 410. A locking rod 418 is arranged at the upper end of the sliding bottom plate 404. A clamping groove is formed on the outer surface of the towing rod 419. The left end of the locking rod 418 abuts against the inside of the clamping groove. A sliding block 415 is slidably installed at the upper end of the sliding bottom plate 404. The sliding block 415 corresponds to the towing rod 419, and the sliding block 415 and the towing rod 419 are connected by a towing spring 417. Specifically, a driven gear 416 is rotatably installed at the upper end of the sliding bottom plate 404. The driven gear 416 is fixedly welded to the right end of the locking rod 418. A driving rack is fixedly installed at one end of the sliding block 415 close to or away from the contact rod 405. After the sliding block 415 moves to the position of the driven gear 416, the driving rack meshes with the driven gear 416. Subsequently, the locking rod 418 rotates, and the left end will disengage from the clamping groove on the outer surface of the towing rod 419. The conductive sleeve 406 is connected to the battery cell 3 inside the power supply compartment 1 through a wire;

[0046] Such as Figure 9 , Figure 10 As shown in the figure, a guiding rod 408 is rotatably installed at the upper end of the rotating block 403. One end of the guiding rod 408 away from the rotating block 403 is fixedly connected to a towing wire 409. The free end of the towing wire 409 is fixedly connected to the sliding block 415. The sliding block 415 and the sliding bottom plate 404 are connected by a return spring 414. The return spring 414 is sleeved on the outer surface of the towing wire 409. Then when the rotating block 403 rotates, the sliding block 415 is pulled to move through the towing wire 409.

[0047] Please refer to Figure 2 , Figure 6 , Figure 11, the upper end of the upper cover 2 is fixedly installed with a central bin 201 through bolts. Inside the central bin 201, there is a pressure-sensitive metal sheet 202 fixedly installed, which can change its resistance value through the change of its shape. The central tube 102 corresponds to the pressure-sensitive metal sheet 202. A sliding frame 207 is slidably installed at the inner end of the central tube 102. The sliding frame 207 is sleeved on the outer surface of the central rod 105. A sealing rubber ring is sleeved on the outer surface of the sliding frame 207 and is closely attached to the inside of the central tube 102 to improve the sealing performance. A passive rod 206 is rotatably installed at the inner end of the sliding frame 207. A threaded rod 205 is fixedly installed at the upper end of the passive rod 206. A sleeve 204 is slidably installed at the inner end of the sliding frame 207. The sleeve 204 is threadedly sleeved on the outer surface of the threaded rod 205. The passive rod 206 passes through the inner end of the central rod 105. Specifically, a rectangular block is fixedly installed on the outer surface of the passive rod 206, and a rectangular groove is opened at the inner end of the central rod 105. The rectangular block is located in the rectangular groove, so that when the central rod 105 rotates, it can drive the passive rod 206 to rotate, and at the same time, the passive rod 206 can also move upward. A limiting block is fixedly installed at the inner end of the central tube 102, and the limiting block is located below the sliding frame 207, so that the sliding frame 207 will not slide to the bottom end of the central tube 102;

[0048] The upper end of the sleeve 204 is fixedly installed with a pushing block 203. The upper end of the pushing block 203 is in contact with the bottom end of the pressure-sensitive metal sheet 202. When the sleeve 204 moves upward, it pushes the bottom end of the pressure-sensitive metal sheet 202 through the pushing block 203, causing it to deform. When the pressure-sensitive metal sheet 202 deforms, the changes in the length (L) and cross-sectional area (A) of the metal during deformation directly affect the resistance value: , where is the resistivity of the pressure-sensitive metal sheet 202;

[0049] The right end of the spiral line 302 is connected to any end of the pressure-sensitive metal sheet 202 through a wire, and the other end of the pressure-sensitive metal sheet 202 is connected to the output end of the circuit control module through a wire. If the circuit control module detects that the current is too small, it will immediately cut off the power supply and set a current threshold , if the actual current I is less than this threshold , the power supply is cut off, and the current sensor outputs a signal is proportional to the current I, and the current is compared with the threshold , where K is a constant.

[0050] The working principle of the present invention is:

[0051] During use, when the battery cells 3 are in a charging state, if the temperature of one of the battery cells 3 is too high and is conducted to the bimetallic strip 107 through the heat-conducting chamber 101, the bimetallic strip 107 is then deformed by the heat and drives the transmission rod 103 to rotate through the lever 106, and then the transmission rod 103 drives the rotating block 403 to rotate, so that the resistance sheet 407 is separated from the rectangular groove on the outer surface of the conductive sheet 402, so that the cross-sectional area through which the current can pass is reduced, and thus the resistance of the conductive sheet 402 is increased, thereby reducing the current supply of the current battery cell 3;

[0052] If the temperature of the battery cell 3 continues to rise, the rotating block 403 continues to rotate, and the sliding block 415 is pulled to move by the traction line 409. At this time, the traction spring 417 is stretched. When the sliding block 415 moves to the passive gear 416, the driving rack meshes with the passive gear 416, and then the locking rod 418 rotates, and the left end will be disengaged from the clamping groove on the outer surface of the traction rod 419. Then, under the elastic force of the traction spring 417, the traction rod 419 is pulled to move, and the traction rod 419 drives the push rod 410 to move, and finally the push rod 410 pushes the contact rod 405 to the right, so that it is disconnected from the clip 411 and stops the current battery cell 3 from being powered. Since one battery cell 3 is less powered, the current of the remaining battery cells 3 is also increased. Then, when the current is too large, the current generates an induced magnetic field through the spiral wire 302, so that the magnetic rod 303 moves to the right, so that the resistance value of the resistance rod 304 becomes larger, which plays a role in reducing the current passing through;

[0053] When the temperature inside the heat transfer chamber 101 is too high, the heated thermal fluid is transferred to the outer surface of the bimetallic spiral sheet 104, and then the bimetallic spiral sheet 104 begins to twist and drives the center rod 105 to rotate. The center rod 105 drives the passive rod 206 to rotate, causing the sleeve 204 to move upward. As the thermal fluid is heated, it also begins to expand, pushing the sliding frame 207, causing the pushing block 203 to squeeze the pressure-sensitive metal sheet 202, increasing its resistance. At this time, the current of the entire circuit is greatly reduced, and the circuit control module therefore cuts off the circuit to prevent the battery cell 3 from overheating and causing a dangerous accident.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intermittently rechargeable lithium battery parallel power supply device, comprising a power supply compartment (1), characterized in that: A plurality of battery cells (3) for energy storage are arranged inside the power supply compartment (1); an upper cover (2) is fixedly mounted on the upper end of the power supply compartment (1); a current stabilizing device for preventing the battery cells (3) from overheating is arranged on the inner end of the upper cover (2); a heat conducting plate (4) is fixedly mounted on the inner end of the power supply compartment (1); the heat conducting plate (4) is tightly fitted with the battery cells (3); a central tube (102) is passed through the inner end of the heat conducting plate (4); and two heat conducting compartments (101) are fixedly connected to the outer surface of the central tube (102); the two heat conducting compartments (101) are tightly fitted with the heat conducting plate (4); a plurality of bimetallic strips (107) capable of deforming with temperature are arranged inside the two heat conducting compartments (101); the bimetallic strips (107) are respectively fitted on the front and rear ends of the heat conducting compartment (101); and a circuit control module capable of providing a stable power supply is fixedly mounted on the inner end of the upper cover (2); A central rod (105) is rotatably mounted on the inner end of the central tube (102), a bimetallic spiral sheet (104) is sleeved on the outer surface of the central tube (102), a lever (106) is rotatably mounted at the center of the bimetallic sheet (107), a plurality of transmission rods (103) are rotatably mounted on the inner bottom end of the heat transfer chamber (101), and one end of the lever (106) away from the bimetallic sheet (107) is sleeved on the outer surface of the transmission rod (103); An annular spring sheet (110) is fixedly mounted on the inner end of the lever (106), a triangular block (108) is fixedly mounted on the inner end of the annular spring sheet (110), and a slot (109) is provided on the outer surface of the transmission rod (103), the triangular block (108) is embedded in the slot (109), and the bimetallic sheet (107) pushes the lever (106) after being deformed by heat, and then drives the transmission rod (103) to rotate under the action of the triangular block (108) and the slot (109); The flow stabilizing device comprises a temperature control chamber (401), the temperature control chamber (401) being fixedly mounted on the upper end of the upper cover (2), the interior of the temperature control chamber (401) being divided into two chambers, a rotating block (403) being rotatably mounted in each chamber, two conducting sheets (402) being fixedly mounted on the inner end of the temperature control chamber (401), and a sliding bottom plate (404) being fixedly mounted on the inner end of the temperature control chamber (401); The right end of the rotating block (403) is fitted with the left end of the conductive sheet (402); the right end of the rotating block (403) is arc-shaped, so that the conductive sheet (402) is squeezed into an arc shape after being fitted; a resistance sheet (407) is fixedly mounted on the left end of the rotating block (403); a rectangular groove is provided on the outer surface of the conductive sheet (402); the resistance sheet (407) is inserted into the rectangular groove and fits with the outer surface of the conductive sheet (402).

2. The intermittently rechargeable lithium battery parallel power supply device according to claim 1, characterized in that: A conductive sleeve (406) is fixedly mounted on the upper end of the sliding base plate (404), a passive plate (413) is slidably mounted on the right end of the sliding base plate (404), and a contact rod (405) is fixedly connected to the left end of the passive plate (413), and a plurality of clamping pieces (411) capable of clamping the contact rod (405) are fixedly mounted on one end of the conductive sleeve (406) close to the passive plate (413), and the clamping pieces (411) are arranged in a ring shape.

3. The intermittently rechargeable lithium battery parallel power supply device according to claim 2, characterized in that: A traction rod (419) is slidably mounted on the upper end of the sliding base plate (404); a push rod (410) is passed through the inner end of the conductive sleeve (406); the push rod (410) corresponds to the contact rod (405), and the traction rod (419) is fixedly connected to the push rod (410); a locking rod (418) is arranged at the upper end of the sliding base plate (404); a clamping groove is provided on the outer surface of the traction rod (419); the left end of the locking rod (418) abuts against the inside of the clamping groove; a sliding block (415) is slidably mounted on the upper end of the sliding base plate (404); the sliding block (415) corresponds to the traction rod (419), and the sliding block (415) and the traction rod (419) are connected via a traction spring (417).

4. The intermittently rechargeable lithium battery parallel power supply device according to claim 3, characterized in that: A passive gear (416) is rotatably mounted on the upper end of the sliding base plate (404), and the passive gear (416) is fixedly connected to the right end of the locking rod (418). A driving rack is fixedly mounted on the end of the sliding block (415) that is close to and away from the contact rod (405). After the sliding block (415) moves to the passive gear (416), the driving rack meshes with the passive gear (416), and then the locking rod (418) rotates, and the left end is disengaged from the clamping groove on the outer surface of the traction rod (419).

5. The intermittently rechargeable lithium battery parallel power supply device according to claim 1, characterized in that: A central bin (201) is fixedly mounted on the upper end of the upper cover (2), a pressure-sensitive metal sheet (202) capable of changing resistance by changing its shape is fixedly mounted on the inner end of the central bin (201), the central tube (102) corresponds to the pressure-sensitive metal sheet (202), and a sliding frame (207) is slidably mounted on the inner end of the central tube (102), and the sliding frame (207) is sleeved on the outer surface of the central rod (105).

6. The intermittently rechargeable lithium battery parallel power supply device according to claim 5, characterized in that: A passive rod (206) is rotatably mounted on the inner end of the sliding frame (207), a threaded rod (205) is fixedly mounted on the upper end of the passive rod (206), and a sleeve (204) is slidably mounted on the inner end of the sliding frame (207), the sleeve (204) is threadedly sleeved on the outer surface of the threaded rod (205), and the passive rod (206) is inserted into the inner end of the center rod (105), and a push block (203) is fixedly mounted on the upper end of the sleeve (204), and the upper end of the push block (203) is in contact with the bottom end of the pressure-sensitive metal sheet (202).

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