Intermittent charging type lithium battery parallel power supply device

Abstract

The invention relates to the technical field of lithium battery charging devices, in particular to an intermittent charging type lithium battery parallel power supply device which comprises a power supply bin, a plurality of battery cells used for storing energy are arranged in the power supply bin, an upper cover is fixedly installed at the upper end of the power supply bin, and a current stabilizer for preventing the temperature of the battery cells from being too high is arranged at the inner end of the upper cover. A heat conduction plate is fixedly installed at the inner end of the power source bin and tightly attached to the battery cells, a circuit control module capable of providing a stable power source is fixedly installed at the inner end of the upper cover, when the temperature of one battery cell is too high, the current of the current battery cell is reduced according to the current temperature, and meanwhile the currents of the other battery cells can be stabilized. Thermal runaway caused by too high temperature is avoided, and the running safety of the battery pack is remarkably improved, so that the heating of the high-temperature battery core is reduced, the pressure on a heat dissipation system is reduced, and the energy efficiency of a thermal management system is indirectly improved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery charging devices, in particular to an intermittently rechargeable lithium battery parallel power supply device. Background Art

[0002] As a highly 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 size and technical level of lithium batteries are continuously improving.

[0003] After searching, it was found that the prior art publication number is CN113595171A, which discloses an outdoor power supply that can be quickly charged, including a power supply body and a fast charging adapter. The power supply body is provided with a fast charging adapter and a lithium battery pack. The input end of the fast charging adapter is provided with a plug-in charging port. The fast charging adapter is provided with a voltage stabilizing and transformer charging protection circuit. The lithium battery pack is composed of 3 or more single lithium batteries in parallel, each single lithium battery is provided with a single-cell charging protection circuit, and 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, and the output end of the discharge protection circuit is connected to an external power supply port. An LED display is provided on the power supply body, and the LED display is connected to the output end of the voltage stabilizing and transformer charging protection circuit. The outdoor power supply of this scheme can adjust the charging power in real time according to the power of the lithium battery pack to cope with the purpose of fast charging, while achieving fast charging, protecting the lithium battery from damage by high voltage.

[0004] Therefore, based on the above search and in combination with the existing technology, when the above solution is used outdoors, especially in the hot summer, the continuous high temperature will aggravate the decomposition of the 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 battery voltage fluctuations or current instability, thereby affecting the output performance of the power supply device. It may also cause internal short circuits or abnormal current increases, destroying the entire circuit system. For this reason, we propose an intermittently rechargeable lithium battery parallel power supply device. Summary of the invention

[0005] The object of the present invention is to provide an intermittently rechargeable lithium battery parallel power supply device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intermittently rechargeable lithium-ion parallel power supply device, comprising a power supply compartment, a plurality of battery cells for energy storage are arranged inside the power supply compartment, an upper cover is fixedly installed on the upper end of the power supply compartment, and a current stabilizing device is arranged on the inner end of the upper cover to prevent the battery cell temperature from being too high, a heat conduction plate is fixedly installed on the inner end of the power supply compartment, the heat conduction plate is tightly fitted with the battery cell, a central tube is passed through the inner end of the heat conduction plate, and two heat conduction compartments are fixedly connected to the outer surface of the central tube, the two heat conduction compartments are tightly fitted with the heat conduction plate, a plurality of bimetallic strips that can deform with temperature are arranged inside the two heat conduction compartments, the bimetallic strips are respectively fitted on the front and rear ends of the heat conduction compartment, and a circuit control module that can provide a stable power supply is fixedly installed on the inner end of the upper cover.

[0007] As a further solution of the present invention, a center rod is rotatably installed on the inner end of the center tube, a bimetallic spiral sheet is sleeved on the outer surface of the center tube, a shift rod is rotatably installed at the center of the bimetallic sheet, a plurality of transmission rods are rotatably installed on the inner bottom end of the heat transfer chamber, and one end of the shift rod away from the bimetallic sheet is sleeved on the outer surface of the transmission rod.

[0008] As a further solution of the present invention, an annular spring sheet is fixedly installed on the inner end of the lever, a triangular block is fixedly installed on the inner end of the annular spring sheet, and a slot is provided on the outer surface of the transmission rod, and the triangular block is embedded in the slot. After the bimetallic strip is deformed by heat, it pushes the lever, and then drives the transmission rod to rotate under the action of the triangular block and the slot.

[0009] As a further solution of the present invention, the flow stabilizing device includes a temperature control chamber, which is fixedly installed on the upper end of the upper cover, and the interior of the temperature control chamber is divided into two chambers, each of which has a rotating block rotatably installed, two conduction plates are fixedly installed on the inner end of the temperature control chamber, and a sliding bottom plate is fixedly installed on the inner end of the temperature control chamber.

[0010] As a further solution of the present invention, the right end of the rotating block is fitted with the left end of the conductive sheet, and the right end of the rotating block is arc-shaped, so that the conductive sheet is squeezed into an arc shape after fitting, and a resistance sheet is fixedly installed on the left end of the rotating block, and a rectangular groove is provided on the outer surface of the conductive sheet, and the resistance sheet is inserted into the rectangular groove and fits with the outer surface of the conductive sheet.

[0011] As a further solution of the present invention, a conductive sleeve is fixedly installed on the upper end of the sliding base plate, a passive plate is slidably installed on the right end of the sliding base plate, and a contact rod is fixedly connected to the left end of the passive plate, and a plurality of clips capable of clamping the contact rod are fixedly installed on one end of the conductive sleeve close to the passive plate, and the clips are arranged in a ring shape. The ring-shaped arrangement of multiple clips can evenly distribute pressure, firmly clamp the contact rod, ensure stable circuit connection, and avoid problems such as poor contact or circuit interruption due to looseness.

[0012] As a further solution of the present invention, a traction rod is slidably installed on the upper end of the sliding base plate, a push rod is passed 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 provided at the upper end of the sliding base plate, a clamping groove is provided on the outer surface of the traction rod, and the left end of the locking rod abuts against the inside of the clamping groove, a sliding block is slidably installed on the upper end of the sliding base plate, the sliding block corresponds to the traction rod, and the sliding block and the traction rod are connected by a traction spring.

[0013] As a further solution of the present invention, a passive gear is rotatably installed on the upper end of the sliding base plate, and the passive gear is fixedly connected to the right end of the locking rod. A driving rack is fixedly installed on the end of the sliding block close to and away from the contact rod. After the sliding block moves to the passive gear, the driving rack meshes with the passive gear, and then the locking rod rotates, and the left end will disengage from the engaging groove on the outer surface of the traction rod. When the sliding block moves to the passive gear, the driving rack meshes with the passive gear. Through gear transmission, the locking rod can be automatically rotated, thereby disengaging from the engaging groove of the traction rod. No manual operation is required, which simplifies the unlocking process and improves operational convenience and efficiency.

[0014] As a further solution of the present invention, a central bin is fixedly installed on the upper end of the upper cover, a pressure-sensitive metal sheet that can change the resistance value by changing the shape is fixedly installed on the inner end of the central bin, the central tube corresponds to the pressure-sensitive metal sheet, and a sliding frame is slidably installed on the inner end of the central tube, and the sliding frame is sleeved on the outer surface of the central rod.

[0015] As a further solution of the present invention, a passive rod is rotatably installed on the inner end of the sliding frame, a threaded rod is fixedly installed on the upper end of the passive rod, and a sleeve is slidably installed on the inner end of the sliding frame, the sleeve is threadedly sleeved on the outer surface of the threaded rod, and the passive rod is passed through the inner end of the center rod, a pushing block is fixedly installed on the upper end of the sleeve, and the upper end of the pushing block is in contact with the bottom end of the pressure-sensitive metal sheet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, 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 the current of the remaining battery cells can be stabilized to avoid thermal runaway caused by excessive temperature, thereby significantly improving the safety of battery pack operation, thereby reducing the heat generation of high-temperature battery cells, reducing the pressure on the heat dissipation system, and indirectly improving the energy efficiency of the thermal management system; 2. When the present invention is used, when the temperature of the battery cell is too high, the resistance of the varistor metal sheet is increased by squeezing, so that the current of the whole circuit is reduced, and finally the power supply is stopped. After the power supply is stopped, the battery cell enters a non-working state, and the heat generation stops, which helps the overheated battery cell to return to normal temperature as soon as possible, effectively limits the heat from spreading to other battery cells or surrounding components, and ensures the overall temperature balance of the battery pack; 3. The present invention has two pole pieces that can be directly inserted into a socket or connected to a modular power pack, and can be combined with multiple battery cells to form a larger capacity charging and discharging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an intermittently rechargeable lithium battery parallel power supply device; Figure 2 This is a disassembly diagram of an intermittently rechargeable lithium battery parallel power supply device; Figure 3 It is a schematic diagram of the structure of the heat transfer cabin and the central tube; Figure 4 It is a schematic diagram of the structure inside the heat transfer cabin and the central tube; Figure 5 It is a schematic diagram of the disassembled structure of the shift lever and the transmission rod; Figure 6 It is a schematic diagram of the structure inside the upper cover; Figure 7 It is a schematic diagram of the structure inside the regulating chamber; Figure 8 This is a schematic diagram of the structure inside the temperature control warehouse; Fig. 9 It is a schematic diagram of the structure of the rotating block and the conducting sheet; Fig.10 It is a schematic diagram of the structure above the sliding bottom plate; Fig.11 This is a schematic diagram of the structure inside the central warehouse.

[0018] In the figure: 1. Power compartment; 2. Upper cover; 3. Battery cell; 4. Heat conducting plate; 11. Reset torsion spring; 101, heat transfer chamber; 102, center tube; 103, transmission rod; 104, bimetallic spiral sheet; 105, center rod; 106, lever; 107, bimetallic sheet; 108, triangular block; 109, slot; 110, annular spring sheet; 201, central bin; 202, pressure-sensitive metal sheet; 203, push block; 204, sleeve; 205, threaded rod; 206, passive rod; 207, sliding frame; 301, regulating cabin; 302, spiral line; 303, magnetic rod; 304, resistance rod; 305, support block; 401, temperature control chamber; 402, conduction sheet; 403, rotating block; 404, sliding bottom plate; 405, contact rod; 406, conductive sleeve; 407, resistance sheet; 408, guide rod; 409, traction line; 410, push rod; 411, clamping sheet; 412, abutment spring; 413, passive plate; 414, reset spring; 415, sliding block; 416, passive gear; 417, traction spring; 418, locking rod; 419, traction rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1 to 4, an intermittently rechargeable lithium-ion parallel power supply device, comprising a power supply compartment 1, wherein a plurality of battery cells 3 for energy storage are arranged inside the power supply compartment 1, an upper cover 2 is fixedly installed on the upper end of the power supply compartment 1 by bolts, and two pole pieces are fixedly installed on the upper part of the upper cover 2, and these two pole pieces can be directly inserted into a socket or connected to a modular power supply group, and cooperate with a plurality of battery cells 3 to form a larger capacity charging and discharging device, and a current stabilizing device is arranged at the inner end of the upper cover 2 to prevent the temperature of the battery cell 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 further rising, and can also stabilize the current of the remaining battery cells 3 to prevent the current imbalance from causing overload of the remaining battery cells 3, and a circuit control module capable of providing a stable power supply is fixedly installed at the inner end of the upper cover 2, and a current detection module and a processing unit are integrated inside the circuit control module, which is an existing mature technology and will not be elaborated here, and its function is to output a stable voltage and current, and a heat conducting plate 4 is fixedly installed at the inner end of the power supply compartment 1 by bolts, and between the heat conducting plate 4 and the battery cell 3 The inner end of the heat conducting plate 4 is tightly fitted by thermal grease, and a central tube 102 is passed through, and the outer surface of the central tube 102 is fixedly connected to two heat conducting chambers 101, and the two heat conducting chambers 101 are tightly fitted to the heat conducting plate 4 by thermal grease, thereby maximizing the heat transfer efficiency, and the interior of the two heat conducting chambers 101 is provided with a plurality of bimetallic strips 107 that can deform with temperature, and the bimetallic strips 107 are formed by bonding two metals with different thermal expansion coefficients, and the appearance changes due to the different thermal expansion coefficients when heated. The bimetallic strips 107 are respectively attached to the front and rear ends of the heat-conducting bin 101, and the bimetallic strips 107 at the front and rear ends of the heat-conducting bin 101 are staggered. Specifically, the left and right ends of the bimetallic strips 107 are slidably connected to the heat-conducting bin 101, and the center is attached to the inner wall of the heat-conducting bin 101, so that the bimetallic strips 107 can deform normally after being heated. More specifically, the center tube 102 and the interior of the heat-conducting bin 101 are filled with heat-conducting liquid, and all the bimetallic strips 107 in the heat-conducting bin 101 are immersed; See also Figure 2 - Figure 6 A center rod 105 is rotatably installed at the inner end of the center tube 102, and a bimetallic spiral sheet 104 is sleeved on the outer surface of the center tube 102. The principle of the bimetallic spiral sheet 104 is the same as that of the bimetallic spiral sheet 107, except that the bimetallic spiral sheet 104 begins to twist after being heated. Specifically, the upper end of the bimetallic spiral sheet 104 is fixedly connected to the outer surface of the center rod 105, and the bottom end is fixedly connected to the inner end of the center tube 102.

[0021] A lever 106 is rotatably mounted at the center of the bimetallic strip 107, and a plurality of transmission rods 103 are rotatably mounted at the inner bottom end of the heat-conducting chamber 101. Specifically, two transmission rods 103 are arranged inside the two heat-conducting chambers 101, and one end of the lever 106 away from the bimetallic strip 107 is sleeved on the outer surface of the transmission rod 103, and an annular spring sheet 110 is fixedly mounted on the inner end of the lever 106, and a triangular block 108 is fixedly mounted on the inner end of the annular spring sheet 110, and a card slot 109 is provided on the outer surface of the transmission rod 103, and the triangular block 108 is embedded in the inside of the card slot 109. After the bimetallic strip 107 is deformed by heat, it pushes the lever 106, and then drives the transmission rod 103 to rotate under the action of the triangular block 108 and the card slot 109; The internal heat of the heat-conducting chamber 101 is not uniform, so the bimetallic strip 107 is not uniformly deformed when heated. When any triangular block 108 drives the transmission rod 103 to rotate through the slot 109, the slots 109 in other areas will squeeze the slope of the triangular block 108, so that the annular spring sheet 110 is compressed, avoiding possible conflict of the lever 106 during the rotation process.

[0022] Example 2: Please refer to Figure 6-Figure 8 , an intermittent charging lithium battery parallel power supply device, based on the embodiment 1, the upper end of the upper cover 2 is fixedly installed with an adjustment chamber 301 on both sides, and the inner end of the adjustment chamber 301 is provided with two chambers, and a plurality of support blocks 305 are fixed in each chamber, and the inner end of the support block 305 is penetrated with a magnetic rod 303, and the inner end of the rightmost support block 305 is fixedly installed with a magnet, and the polarity of the magnet close to the magnetic rod 303 is the same as the polarity of the right side of the magnetic rod 303, so that the magnetic rod 303 always maintains a force toward the left side, wherein the inner ends of the two support blocks 305 are fixedly installed with a spiral wire 302, and the spiral wire 302 is made of copper and is sleeved on the magnetic rod 3 03, the left end of the magnetic rod 303 is fixedly installed with a resistance rod 304, and is inserted into the inside of the leftmost support block 305. The leftmost support block 305 is made of copper. 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, thereby changing the current resistance. Specifically, the left end of the spiral wire 302 is connected to the resistance rod 304 through a wire, so that 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 of the resistance rod 304 becomes larger, which plays a role in reducing the current passing (Ohm's law: I=U / R); The flow stabilizing device includes a temperature control chamber 401, which is fixedly mounted on the upper end of the upper cover 2. The interior of the temperature control chamber 401 is divided into two chambers, and a rotating block 403 is rotatably mounted in each chamber. The upper end of the transmission rod 103 is fixedly connected to the rotating block 403 (not shown in the figure), and the transmission rod 103 is connected to the bottom end of the upper cover 2 through a reset torsion spring 11. Two conductive sheets 402 are fixedly mounted on the inner end of the temperature control chamber 401. The conductive sheets 402 are made of metal, such as nickel-chromium alloy, copper-resistant, iron-chromium-aluminum alloy, etc., and have a certain resistance value. A sliding bottom plate 404 is fixedly mounted on the inner end of the temperature control chamber 401; like Figure 1 , Figure 7 , Fig. 9 As shown, the right end of the rotating block 403 is fitted with the left end of the conductive sheet 402, and the right end of the rotating block 403 is arc-shaped, so that the conductive sheet 402 is squeezed into an arc after being fitted, and a resistance sheet 407 is fixedly installed on the left end of the rotating block 403. A rectangular groove is provided on the outer surface of the conductive sheet 402, and the resistance sheet 407 is inserted into the rectangular groove and fits with the outer surface of the conductive sheet 402, and the material of the resistance sheet 407 is the same as that of the conductive sheet 402. Specifically, the edges of the rectangular groove inside the conductive sheet 402 and the edges of the resistance sheet 407 are chamfered to achieve smoother rotation of the rotating block 403. More specifically, when the rotating block 403 rotates, the resistance sheet 407 is also separated from the rectangular groove, so that the cross-sectional area through which the current can pass through the conductive sheet 402 becomes smaller, so the resistance of the conductive sheet 402 becomes larger, and the conductive sheet 402 is connected to the left support block 305 in the adjustment chamber 301 through a wire.

[0023] A conductive sleeve 406 is fixedly installed on the upper end of the sliding base plate 404 by bolts, a passive plate 413 is slidably installed 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 clips 411 capable of clamping the contact rod 405 are fixedly installed on one end of the conductive sleeve 406 close to the passive plate 413, and the clips 411 are arranged in a ring shape. Specifically, the contact rod 405, the clips 411 and the conductive sleeve 406 are all made of copper, and the passive plate 413 is made of an insulating endurance plate. More specifically, the left end of the contact rod 405 is spherical, and its diameter is larger than the diameter of the contact rod 405 itself, so that it is convenient for the clips 411 to clamp it, and the contact rod 405 is slidably connected to the sliding base plate 404, the passive plate 413 and the sliding base plate 404 are connected by abutting springs 412, and the contact rod 405 and the conductive sheet 402 are connected by wires; A traction rod 419 is slidably installed on the upper end of the sliding base plate 404. The traction rod 419 is made of an insulating material, such as an endurance plate. The endurance plate has the characteristics of high impact resistance, high temperature resistance, and firmness. A push rod 410 is penetrated 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 provided on the upper end of the sliding base plate 404. A card slot 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 card slot. A sliding block 415 is slidably installed on the upper end of the sliding base plate 404. The sliding block 415 abuts against the traction rod 418. 19, and the sliding block 415 is connected to the traction rod 419 through a traction spring 417. Specifically, a passive gear 416 is rotatably installed on the upper end of the sliding base plate 404, and the passive gear 416 is fixedly welded to the right end of the locking rod 418. A driving rack is fixedly installed on the end of the sliding block 415 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 will be disengaged from the clamping groove on the outer surface of the traction rod 419, and the conductive sleeve 406 is connected to the battery cell 3 inside the power supply compartment 1 through a wire; like Fig. 9 , Fig.10 As shown, a guide rod 408 is rotatably installed on the upper end of the rotating block 403, and a traction line 409 is fixedly connected to the end of the guide rod 408 away from the rotating block 403, and the free end of the traction line 409 is fixedly connected to the sliding block 415, and the sliding block 415 is connected to the sliding base plate 404 through a reset spring 414, and the reset spring 414 is sleeved on the outer surface of the traction line 409, so when the rotating block 403 rotates, the sliding block 415 is pulled to move by the traction line 409.

[0024] See also Figure 2 , Figure 6 , Fig.11The upper end of the upper cover 2 is fixedly installed with a central bin 201 by bolts, and a pressure-sensitive metal sheet 202 that can change the resistance value by changing the shape is fixedly installed 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 installed on the inner end of the central tube 102. The sliding frame 207 is sleeved on the outer surface of the central rod 105. The outer surface of the sliding frame 207 is sleeved with a sealing rubber ring and fits tightly with the inside of the central tube 102 to improve the sealing performance. The inner end of the sliding frame 207 is rotatably installed with a passive rod 206, and the upper end of the passive rod 206 is fixedly installed with a threaded rod 205, and the ... with a sealing rubber ring. The inner end of the frame 207 is slidably installed with a sleeve 204, and the sleeve 204 is threadedly sleeved on the outer surface of the threaded rod 205, and the passive rod 206 is penetrated through the inner end of the center 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 center rod 105. The rectangular block is located in the rectangular groove, so that the center rod 105 can drive the passive rod 206 to rotate when rotating, and the passive rod 206 can also move upward, and a limit block is fixedly installed on the inner end of the center tube 102, and the limit block is located below the sliding frame 207, so that the sliding frame 207 will not slide to the bottom of the center tube 102; A push block 203 is fixedly installed on the upper end of the sleeve 204. The upper end of the push block 203 fits with the bottom end of the pressure-sensitive metal sheet 202. When the sleeve 204 moves upward, the push block 203 pushes the bottom end of the pressure-sensitive metal sheet 202 to cause it to deform. When the pressure-sensitive metal sheet 202 is deformed, the changes in length (L) and cross-sectional area (A) directly affect the resistance value: ,in is the resistivity of the varistor metal sheet 202; The right end of the spiral wire 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, the power supply is immediately cut off to set the 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 Proportional to current I, compares current with threshold , where K is a constant.

[0025] The working principle of the present invention is: 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; 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; 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.

[0026] 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).

2. The intermittently rechargeable lithium battery parallel power supply device according to claim 1, characterized in that: 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).

3. The intermittently rechargeable lithium battery parallel power supply device according to claim 2, characterized in that: 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).

4. The intermittently rechargeable lithium battery parallel power supply device according to claim 1, characterized in that: 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).

5. The intermittently rechargeable lithium battery parallel power supply device according to claim 4, characterized in that: 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).

6. The intermittently rechargeable lithium battery parallel power supply device according to claim 5, 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.

7. The intermittently rechargeable lithium battery parallel power supply device according to claim 6, 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).

8. The intermittently rechargeable lithium battery parallel power supply device according to claim 7, 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).

9. 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).

10. The intermittently rechargeable lithium battery parallel power supply device according to claim 9, 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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