A lithium iron phosphate battery positive electrode and a lithium ion battery pack

Abstract

The present invention relates to the field of lithium iron phosphate batteries, specifically a lithium iron phosphate battery positive electrode and a lithium ion battery pack thereof, comprising a box shell, the box shell is used for placing and protecting the battery, the bottom of the box shell is fixedly connected with a chassis; a voltage regulating mechanism, the voltage regulating mechanism is used for regulating the volume of the battery positive electrode; the voltage regulating mechanism is arranged inside the box shell, wherein the voltage regulating mechanism comprises a voltage regulating assembly, the voltage regulating assembly is arranged inside the box shell, the top of the voltage regulating assembly is fixedly connected with a wire, and the end of the wire away from the voltage regulating assembly is plugged with a junction box. The lithium iron phosphate battery positive electrode and the lithium ion battery pack thereof, through the conveying pipe sequentially passing through the circular hole and the pressure tube and squeezing the barrier film, the barrier film will be broken, and then the conductive agent inside the feeder will be conveyed to each layer of the positive electrode material through the conveying pipe, thereby increasing the positive electrode conductivity and improving the charging and discharging efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium iron phosphate batteries, in particular to a lithium iron phosphate battery positive electrode and a lithium ion battery pack thereof. Background Art

[0002] Lithium iron phosphate battery is a lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The single cell rated voltage is 3.2V and the charging cut-off voltage is 3.6V~3.65V.

[0003] Lithium iron phosphate batteries have the advantages of high operating voltage, high energy density, long cycle life, good safety performance, low self-discharge rate and no memory effect.

[0004] There are several problems with the existing lithium iron phosphate battery: 1. Although high-temperature safety is good and beneficial to the ion diffusion rate of the positive electrode material, its performance and life will still be affected to a certain extent when working for a long time in a high-temperature environment; 2. After a long period of charging and discharging, part of the conductive agent inside the positive electrode material will be lost. Because of the loss of the conductive agent, the charging efficiency of the entire battery will be reduced, which increases the charging cycle. Summary of the invention

[0005] The present invention provides a lithium iron phosphate battery positive electrode and a lithium ion battery pack thereof to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a positive electrode of a lithium iron phosphate battery, comprising a box shell, the box shell is used for placing and protecting the battery, and the bottom of the box shell is fixedly connected to a base frame;

[0007] A voltage regulating mechanism, which is used to regulate the volume of the positive electrode of the battery;

[0008] The voltage regulating mechanism is arranged inside the box shell, wherein the voltage regulating mechanism includes a voltage regulating assembly, the voltage regulating assembly is arranged inside the box shell, a wire is fixedly connected to the top of the voltage regulating assembly, an end of the wire away from the voltage regulating assembly is plugged into a junction box, a wire outlet is fixedly connected to the top of the junction box, and the junction box is fixedly connected to the top of the box shell.

[0009] Preferably, the voltage regulating assembly includes a battery shell, which is arranged inside the box shell, and the top of the battery shell is fixedly connected with a positive electrode ear and a negative electrode ear, respectively, wherein the positive electrode ear and the negative electrode ear are symmetrically connected to the top of the battery shell, and the tops of the positive electrode ear and the negative electrode ear are fixedly connected to the wire.

[0010] Preferably, the interior of the battery shell is respectively fixedly connected with a current collector, a SEI membrane and a polyethylene diaphragm, wherein the polyethylene diaphragm is arranged at the central part of the interior of the battery shell, the SEI membrane is arranged between the current collector and the polyethylene diaphragm, and a pressure regulating member is arranged between the SEI membrane and the current collector, wherein the pressure regulating members are symmetrically arranged on both sides of the battery shell.

[0011] Preferably, the pressure regulating part includes an inclined panel, which is inserted into the top of the battery shell and extends to the interior. A circular hole is opened on the surface of the inclined panel. A pressure tube is extruded and adapted on the outer side of the inclined panel. A barrier membrane is fixedly connected to the inside of the pressure tube. A movable inner plate is fixedly connected to the end of the pressure tube away from the inclined panel, and the movable inner plate is slidably adapted inside the battery shell.

[0012] Preferably, the end of the inclined plate away from the pressure tube is slidably adapted to be equipped with a conveying tube, the end of the conveying tube away from the inclined plate is fixedly connected to a feeder, the side of the feeder close to the battery shell is fixedly connected to a spring, the end of the spring away from the feeder is fixedly connected to the outside of the battery shell, wherein a conductive agent is placed inside the feeder.

[0013] A lithium-ion battery pack, comprising:

[0014] A limiting mechanism, which is used to limit and fix the battery;

[0015] A heat dissipation mechanism, which is used to dissipate the heat inside the battery;

[0016] The limiting mechanism is symmetrically connected to both sides of the box shell, and the heat dissipation mechanism is fixedly installed at the bottom of the box shell;

[0017] The limiting mechanism includes a bottom pressure block, which is fixedly connected to the bottom of the battery shell, and a protective seat is arranged on the side of the bottom pressure block, and the protective seat is fixedly connected to the bottom of the inner cavity of the box shell, and an inclined rod is inserted into the inside of the protective seat, and one end of the inclined rod is extruded and adapted with the bottom pressure block, and the end of the inclined rod away from the bottom pressure block is fixedly connected with a limiting claw, wherein the part where the inclined rod is connected to the limiting claw is tough, and the center part of the limiting claw is rotatably connected with a hinge seat, and the hinge seat is fixedly connected to the outside of the box shell, and the top of the limiting claw is extruded and adapted with the outside of the battery shell.

[0018] Preferably, the heat dissipation mechanism includes a conical tube, the top of the inner cavity of the conical tube is fixedly connected to an inner support, the inner part of the inner support is rotatably connected to a swivel, the bottom of the swivel is fixedly connected to a filter, the outer side of the filter is fixedly connected to an elastic ring, and the side of the elastic ring away from the filter is squeezed and adapted to the inside of the conical tube.

[0019] Preferably, a heat dissipation component is fixedly connected to the central part of the inner side of the filter, and the heat dissipation component is fixedly connected to the bottom of the box shell, a sleeve is fixedly connected to the inner side of the filter, a rod is inserted into the end of the sleeve away from the filter, and a universal seat is fixedly connected to the end of the rod away from the sleeve, and a plugging plate is fixedly connected to the bottom of the universal seat, and a socket plate is slidably adapted on the outer side of the plugging plate, and the socket plate is fixedly connected to the bottom of the conical tube, and the socket plate and the bottom of the conical tube are fixedly connected to a collection frame.

[0020] Preferably, the heat dissipation assembly includes a double-connected tube, which is fixedly connected to the bottom of the box shell, the outer end of the double-connected tube is fixedly connected to the conical tube, the inner side of the double-connected tube is fixedly connected to a frame, the center part of the frame is fixedly connected to a motor, the output end of the motor is connected to a fan through a coupling, the output shaft of the motor is fixedly connected to a friction block at one end close to the fan, the outer side of the friction block is extruded and adapted with an inner shaft, the inner shaft is arranged inside the motor output shaft, the outer end face of the inner shaft is fixedly connected to a return spring, and the end of the return spring away from the inner shaft is fixedly connected to the inner side of the filter.

[0021] Preferably, one end of the double-connected tube away from the conical tube is fixedly connected to a flow tube, the top of the flow tube is fixedly connected to an air outlet plate, a square hole is opened on the top of the air outlet plate, and the top of the inner cavity of the air outlet plate is respectively fixedly connected to a first drainage plate and a second drainage plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The portion connected to the limiting claw by the inclined rod is tough, so the rotating limiting claw will make its top end pass through the box shell and squeeze and limit the outer side of the battery shell, thereby playing the role of limiting and fixing the battery shell during the insertion process.

[0024] 2. The universal seat fixedly connected to the other end of the plug rod is connected to the plugging plate, so the universal seat will be inserted into the socket plate with the plugging plate, causing the collection frame fixedly connected to the bottom of the socket plate to be connected to the conical tube, thereby allowing the impurities filtered by the filter to fall into the collection frame due to their own gravity for collection and processing.

[0025] 3. An air outlet plate is fixedly connected to the top of the flow pipe, and the top of the inner cavity of the air outlet plate is fixedly connected to the first and second guide plates, so the generated wind will flow along the first and second guide plates from bottom to top and fill into the interior of the box shell, thereby achieving the effect of heat dissipation.

[0026] 4. The barrier film is squeezed by passing through the circular hole and the pressure tube in turn through the conveying pipe. At this time, the barrier film will be broken, and then the conductive agent inside the feeder will be transported to each layer of the positive electrode material through the conveying pipe, thereby increasing the conductivity of the positive electrode and improving the charging and discharging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic diagram of the external structure of a lithium iron phosphate battery positive electrode and a lithium ion battery pack thereof.

[0028] Figure 2 It is a schematic cross-sectional structural diagram of the present invention as a whole.

[0029] Figure 3 It is a structural schematic diagram of the voltage regulating mechanism of the present invention.

[0030] Figure 4 It is a schematic diagram of the full cross-section structure of the voltage regulating assembly of the present invention.

[0031] Figure 5 It is a schematic diagram of the full cross-section structure of the pressure regulating component of the present invention.

[0032] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0033] Figure 7 It is a structural schematic diagram of the limiting mechanism of the present invention.

[0034] Figure 8 It is a schematic diagram of the full cross-section structure of the limiting mechanism of the present invention.

[0035] Fig. 9 It is a schematic cross-sectional structural diagram of some components of the heat dissipation mechanism of the present invention.

[0036] Fig.10 It is a schematic cross-sectional structural diagram of the lower half of the heat dissipation mechanism of the present invention.

[0037] Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure at point B in the middle.

[0038] Fig.12 It is a schematic cross-sectional structural diagram of the heat dissipation assembly of the present invention.

[0039] Fig.13 It is an enlarged structural schematic diagram of some components of the heat dissipation assembly of the present invention.

[0040] Fig.14 It is a schematic cross-sectional structural diagram of some components of the heat dissipation assembly of the present invention.

[0041] In the figure: 1, box shell; 2, bottom frame; 3, limit mechanism; 4, heat dissipation mechanism; 5, voltage regulating mechanism; 51, voltage regulating assembly; 52, wire; 53, junction box; 54, outlet head; 511, positive ear; 512, negative ear; 513, battery shell; 514, current collector; 515, SEI film; 516, voltage regulating piece; 517, polyethylene diaphragm; 5161, inclined plate; 5162, round hole; 5163, pressure tube; 5164, barrier film; 5165, movable inner plate; 5166, conveying pipe; 5167, feeder; 5168, spring; 31, bottom pressure block; 32 , protective seat; 33, inclined rod; 34, limiting claw; 35, hinged seat; 41, tapered tube; 42, inner support; 43, swivel; 44, filter; 45, elastic ring; 46, heat dissipation component; 47, sleeve; 48, plug rod; 49, universal seat; 40, plugging plate; 401, socket plate; 402, collection frame; 461, double-connected pipe; 462, rack; 463, motor; 464, fan; 465, inner shaft; 466, return spring; 467, flow pipe; 468, air outlet plate; 469, No. 1 drainage plate; 460, No. 2 drainage plate; 4601, friction block. DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. It should be noted that 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 making creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 14 The present invention provides a technical solution: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, it includes a box shell 1, which is used to place and protect the battery, and a base frame 2 is fixedly connected to the bottom of the box shell 1;

[0044] The voltage regulating mechanism 5 is used to regulate the volume of the positive electrode of the battery.

[0045] The voltage regulating mechanism 5 is arranged inside the box shell 1, wherein the voltage regulating mechanism 5 includes a voltage regulating assembly 51, the voltage regulating assembly 51 is arranged inside the box shell 1, a wire 52 is fixedly connected to the top of the voltage regulating assembly 51, an end of the wire 52 away from the voltage regulating assembly 51 is plugged with a junction box 53, a wire outlet 54 is fixedly connected to the top of the box shell 1. The junction box 53 is fixedly connected to the top of the box shell 1.

[0046] The voltage regulating assembly 51 includes a battery shell 513, which is arranged inside the box shell 1, and the top of the battery shell 513 is fixedly connected with a positive electrode ear 511 and a negative electrode ear 512, wherein the positive electrode ear 511 and the negative electrode ear 512 are symmetrically connected to the top of the battery shell 513, and the tops of the positive electrode ear 511 and the negative electrode ear 512 are fixedly connected to the wire 52, and the inside of the battery shell 513 is fixedly connected with a current collector 514, a SEI film 515 and a polyethylene diaphragm 517, wherein the polyethylene diaphragm 517 is arranged at the central part of the battery shell 513, the SEI film 515 is arranged between the current collector 514 and the polyethylene diaphragm 517, and a voltage regulating member 516 is arranged between the SEI film 515 and the current collector 514, wherein the voltage regulating member 516 is symmetrically arranged on both sides of the battery shell 513.

[0047] The pressure regulating member 516 includes an inclined plate 5161, which is inserted into the top of the battery shell 513 and extends to the inside. A circular hole 5162 is opened on the surface of the inclined plate 5161. A pressure tube 5163 is squeezed and adapted on the outside of the inclined plate 5161. A barrier film 5164 is fixedly connected to the inside of the pressure tube 5163. The end of the pressure tube 5163 away from the inclined plate 5161 is fixedly connected to a movable inner plate 5165. The movable inner plate 5165 is slidably adapted in the inside of the battery shell 513. The end of the inclined plate 5161 away from the pressure tube 5163 is slidably adapted to be equipped with a delivery tube 5166. The delivery tube 5166 is away from the inclined plate 5161. One end is fixedly connected to a feeder 5167, a side of the feeder 5167 close to the battery shell 513 is fixedly connected to a spring 5168, and one end of the spring 5168 away from the feeder 5167 is fixedly connected to the outside of the battery shell 513, wherein a conductive agent is placed inside the feeder 5167, wherein positive electrode material is placed between the current collector 514 and the SEI film, wherein the positive electrode material includes lithium iron phosphate, a conductive agent, an adhesive and other substances, however, after the entire battery is charged and discharged for a long time, part of the conductive agent inside the positive electrode material will be lost, due to the loss of the conductive agent, the charging efficiency of the entire battery will be reduced, thereby increasing the charging cycle. Therefore, when the operator manually presses down the inclined plate 5161, the inclined plate 5161 will squeeze the pressure tube 5163 outward, wherein the contact surface between the inclined plate 5161 and the pressure tube 5163 is an inclined surface, and the movable inner plate 5165 fixedly connected to the other end of the pressure tube 5163 will move toward the inside of the battery shell 513, causing the space where the positive electrode material is located to be slightly compressed. At the same time, as the inclined plate 5161 moves downward, the circular hole 5162 opened on its surface will move downward and contact with the input The delivery pipe 5166 is connected, and the other end of the delivery pipe 5166 is connected to the feeder 5167. At this time, the spring 5168 connected to the inner side of the feeder 5167 will be compressed, causing the delivery pipe 5166 to pass through the circular hole 5162 and the pressure tube 5163 in turn and squeeze the barrier film 5164. At this time, the barrier film 5164 will be broken, and then the conductive agent inside the feeder 5167 will be transported to each layer of the positive electrode material through the delivery pipe 5166, thereby increasing the conductivity of the positive electrode and improving the charging and discharging efficiency.

[0048] like Figure 7 and Figure 8 As shown, a limiting mechanism 3 is used for limiting and fixing the battery;

[0049] A heat dissipation mechanism 4, which is used to dissipate the heat inside the battery;

[0050] The limiting mechanism 3 is symmetrically connected to both sides of the box shell 1, and the heat dissipation mechanism 4 is fixedly installed at the bottom of the box shell 1;

[0051] The limiting mechanism 3 includes a bottom pressing block 31, which is fixedly connected to the bottom of the battery shell 513. A protective seat 32 is arranged on the side of the bottom pressing block 31. The protective seat 32 is fixedly connected to the bottom of the inner cavity of the box shell 1. An inclined rod 33 is inserted into the protective seat 32. One end of the inclined rod 33 is squeezed and adapted with the bottom pressing block 31. The end of the inclined rod 33 away from the bottom pressing block 31 is fixedly connected to a limiting claw 34. The part where the inclined rod 33 is connected to the limiting claw 34 is tough. The center part of the limiting claw 34 is rotatably connected with a hinge seat 35. The hinge seat 35 is fixedly connected to the outside of the box shell 1. The top of the limiting claw 34 is squeezed and adapted with the outside of the battery shell 513. By extending the battery shell 513 into the box shell 1 and placing it on the protective seat 32, when the battery shell 513 moves downward, it will bring the bottom pressing block 31 fixedly connected to its bottom to squeeze the inclined rod 33. The bottom pressing block 31 The contact surface with the inclined rod 33 is an inclined surface. At this time, the inclined rod 33 will extend outward along the inner wall of the protective seat 32, and the limiting claw 34 fixedly connected to the other end of the inclined rod 33 will be deflected clockwise through the hinge seat 35, wherein the portion where the inclined rod 33 is connected to the limiting claw 34 is tough. At this time, the top of the limiting claw 34 will pass through the box shell 1 and squeeze and limit the outer side of the battery shell 513, thereby playing the role of limiting and fixing the battery shell 513 during the insertion process, and at the same time, it will also improve the safety of the equipment: reduce the possibility of safety hazards such as leakage and fire caused by loose batteries, protect the personal and property safety of users, and improve the stability of electrical connections: help maintain good contact between the battery electrodes and the connecting components, reduce changes in contact resistance, improve the efficiency of power transmission, and prevent problems such as heat, energy loss and even short circuit caused by poor contact.

[0052] like Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14As shown, the heat dissipation mechanism 4 includes a conical tube 41, the top of the inner cavity of the conical tube 41 is fixedly connected with an inner support 42, the inner part of the inner support 42 is rotatably connected with a swivel 43, the bottom of the swivel 43 is fixedly connected with a filter 44, the outer side of the filter 44 is fixedly connected with an elastic ring 45, the side of the elastic ring 45 away from the filter 44 is squeezed and adapted in the interior of the conical tube 41, the central part of the inner side of the filter 44 is fixedly connected with a heat dissipation component 46, the heat dissipation component 46 is fixedly connected to the bottom of the box shell 1, the inner side of the filter 44 is fixedly connected with a sleeve 47, the end of the sleeve 47 away from the filter 44 is plugged with a plug rod 48, the end of the plug rod 48 away from the sleeve 47 is fixedly connected with a universal seat 49, the bottom of the universal seat 49 is fixedly connected with an embedding plate 40, the outer side of the embedding plate 40 is slidably adapted with a socket plate 401, the socket plate 401 is fixedly connected to the bottom of the conical tube 41, the socket plate 401 and the conical tube The bottom of 41 is fixedly connected to a collecting frame 402. At this time, the filter screen 44 connected to the other end of the return spring 466 will deflect inward on the inner support 42 through the swivel ring 43, wherein the filter screen 44 plays a role in filtering impurities in the external air. At the same time, the elastic ring 45 fixedly connected to the ring side of the filter screen 44 is elastic. During the inward deflection of the filter screen 44, the sleeve 47 fixedly connected to the inner side thereof will deflect inward with the insertion rod 48, and the universal seat 49 fixedly connected to the other end of the insertion rod 48 is connected to the embedding plate 40. Therefore, the universal seat 49 will be inserted into the socket plate 401 with the embedding plate 40, so that the collecting frame 402 fixedly connected to the bottom of the socket plate 401 will be connected to the conical tube 41, thereby allowing the impurities filtered out by the filter screen 44 to fall into the collecting frame 402 for collection and treatment due to their own gravity.

[0053] The heat dissipation component 46 includes a double-connecting tube 461, which is fixedly connected to the bottom of the box shell 1. The outer end of the double-connecting tube 461 is fixedly connected to the conical tube 41. The inner side of the double-connecting tube 461 is fixedly connected to a frame 462. The central part of the frame 462 is fixedly connected to a motor 463. The output end of the motor 463 is connected to a fan 464 through a coupling. The output shaft of the motor 463 is fixedly connected to a friction block 4601 at one end close to the fan 464. The outer side of the friction block 4601 is extruded and adapted with an inner shaft 465. The inner shaft 465 is arranged inside the output shaft of the motor 463. The outer end surface of the inner shaft 465 is fixedly connected to a return spring 466. Then, the electric The motor 463 is connected to the fan 464 through the coupling at its output end, and the outermost end of the output shaft of the motor 463 is fixedly connected to the friction block 4601, and the outer side of the friction block 4601 is extrusion-fitted with the inner shaft 465. At this time, the rotation of the output shaft of the motor 463 will rotate with the friction block 4601. However, there is an extrusion-fitting and friction-fitting relationship between the friction block 4601 and the inner shaft 465, so that the friction block 4601 will rotate with the inner shaft 465. The end of the inner shaft 465 away from the motor 463 is fixedly connected to the return spring 466, and the other end of the return spring 466 is connected to the filter 44. The return spring 466 is connected to each other, so the return spring 466 will be twisted, so that its length will be reduced and its diameter will be increased. However, when the friction force between the friction block 4601 and the inner shaft 465 is less than the torsional force of the return spring 466, the inner shaft 465 will remain stationary with the return spring 466, and the friction block 4601 will continue to rotate with the output shaft of the motor 463, wherein the return spring 466 still maintains a compressed and torsional state, and the end of the return spring 466 away from the inner shaft 465 is fixedly connected to the inner side of the filter screen 44, and the end of the double-connected tube 461 away from the conical tube 41 is fixedly connected to the flow tube 467, and the top of the flow tube 467 is fixedly connected to the air outlet plate 468. A square hole is provided at the top of the air outlet plate 468, and the top of the inner cavity of the air outlet plate 468 is fixedly connected to the first guide plate 469 and the second guide plate 460, respectively. Then, the wind introduced by the fan 464 will pass through the conical tube 41 and the double tube 461 in turn into the flow pipe 467, wherein the top of the flow pipe 467 is fixedly connected with the air outlet plate 468, and the top of the inner cavity of the air outlet plate 468 is fixedly connected to the first guide plate 469 and the second guide plate 460, respectively. Therefore, the formed wind will flow along the first guide plate 469 and the second guide plate 460, and fill into the interior of the box shell 1 from bottom to top, thereby realizing the effect of heat dissipation.

[0054] When the present invention is in use: first, the battery shell 513 is extended into the box shell 1 and placed on the protective seat 32. During the downward movement of the battery shell 513, it will squeeze the inclined rod 33 with the bottom pressure block 31 fixedly connected to the bottom thereof. At this time, the inclined rod 33 will extend outward along the inner wall of the protective seat 32, and the limiting claw 34 fixedly connected to the other end of the inclined rod 33 will be deflected clockwise through the hinge seat 35. At this time, the top end of the limiting claw 34 will pass through the box shell 1 and squeeze and limit the outer side of the battery shell 513. Then, the motor 463 is started again, so that the fan 464 connected to its output end through the coupling will rotate. In addition, the outermost end of the output shaft of the motor 463 is fixedly connected to the friction block 4601, and the outer side of the friction block 4601 is squeezed and adapted with the inner shaft 465. At this time, the rotation of the output shaft of the motor 463 will rotate with the friction block 4601. However, there is an extrusion adaptation and friction adaptation relationship between the friction block 4601 and the inner shaft 465, so that the friction block 4601 will rotate with the inner shaft 465, and the end of the inner shaft 465 away from the motor 463 is fixedly connected to the return spring 466, and the return spring 466 6 is connected to the filter screen 44, so the return spring 466 will be twisted, so that its length will be reduced and its diameter will be increased. At this time, the filter screen 44 will be deflected inwardly on the inner support 42 through the swivel 43. During the inward deflection of the filter screen 44, the sleeve 47 fixedly connected to the inner side thereof will deflect inwardly with the insertion rod 48, and the universal seat 49 fixedly connected to the other end of the insertion rod 48 is connected to the embedding plate 40. Therefore, the universal seat 49 will be inserted into the socket plate 401 with the embedding plate 40, so that the collection frame 402 fixedly connected to the bottom of the socket plate 401 will be connected to the tapered tube 41.

[0055] During the charging process, some lithium ions in lithium iron phosphate escape, are transferred to the negative electrode through the electrolyte, and are embedded in the negative electrode carbon material; at the same time, electrons are released from the positive electrode and reach the negative electrode from the external circuit to maintain the balance of the chemical reaction. During the discharge process, lithium ions escape from the negative electrode and reach the positive electrode through the electrolyte. At the same time, the negative electrode releases electrons and reaches the positive electrode from the external circuit to provide energy to the outside world.

[0056] The above-mentioned embodiments are only preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work all fall within the scope of protection of the present invention.

Claims

1. A lithium iron phosphate battery pack, characterized in that: include: A box shell (1), the box shell (1) is used for placing and protecting batteries, and a bottom frame (2) is fixedly connected to the bottom of the box shell (1); A voltage regulating mechanism (5), the voltage regulating mechanism (5) being used to regulate the volume of the positive electrode of the battery; A limiting mechanism (3), the limiting mechanism (3) being used for limiting and fixing the battery; A heat dissipation mechanism (4), the heat dissipation mechanism (4) being used to dissipate heat inside the battery; The limiting mechanism (3) is symmetrically connected to two sides of the box shell (1), and the heat dissipation mechanism (4) is fixedly installed on the bottom of the box shell (1); The voltage regulating mechanism (5) is arranged inside the box shell (1), wherein the voltage regulating mechanism (5) comprises a voltage regulating assembly (51), the voltage regulating assembly (51) is arranged inside the box shell (1), a wire (52) is fixedly connected to the top of the voltage regulating assembly (51), an end of the wire (52) away from the voltage regulating assembly (51) is plugged into a junction box (53), a wire outlet (54) is fixedly connected to the top of the box shell (1); The voltage regulating assembly (51) comprises a battery shell (513), the battery shell (513) being arranged inside the box shell (1), the top of the battery shell (513) being fixedly connected to a positive electrode ear (511) and a negative electrode ear (512), respectively, wherein the positive electrode ear (511) and the negative electrode ear (512) are symmetrically connected to the top of the battery shell (513), and the tops of the positive electrode ear (511) and the negative electrode ear (512) are both fixedly connected to the wire (52); The battery shell (513) is fixedly connected to a current collector (514), a SEI film (515) and a polyethylene diaphragm (517) respectively, wherein the polyethylene diaphragm (517) is arranged at the center of the battery shell (513), the SEI film (515) is arranged between the current collector (514) and the polyethylene diaphragm (517), and a pressure regulating member (516) is arranged between the SEI film (515) and the current collector (514), wherein the pressure regulating member (516) is symmetrically arranged on both sides of the battery shell (513); The pressure regulating member (516) comprises an inclined panel (5161), the inclined panel (5161) is inserted into the top of the battery shell (513) and extends to the inside, a circular hole (5162) is opened on the surface of the inclined panel (5161), a pressure tube (5163) is squeezed and adapted on the outside of the inclined panel (5161), a barrier film (5164) is fixedly connected to the inside of the pressure tube (5163), and a movable inner plate (5165) is fixedly connected to one end of the pressure tube (5163) away from the inclined panel (5161), and the movable inner plate (5165) is slidably adapted inside the battery shell (513); The end of the inclined plate (5161) away from the pressure tube (5163) is slidably adapted to be equipped with a delivery tube (5166), the end of the delivery tube (5166) away from the inclined plate (5161) is fixedly connected to a feeder (5167), the side of the feeder (5167) close to the battery shell (513) is fixedly connected to a spring (5168), the end of the spring (5168) away from the feeder (5167) is fixedly connected to the outside of the battery shell (513), wherein a conductive agent is placed inside the feeder (5167), and when the operator manually presses the inclined plate (5161) downward, the inclined plate (5161) will squeeze the pressure tube (5163) outward, wherein the contact surface between the inclined plate (5161) and the pressure tube (5163) is an inclined surface, and the pressure tube (5163) is fixedly connected to the pressure tube (5163). The movable inner plate (5165) on the other end will move toward the inside of the battery shell (513), causing the space where the positive electrode material is located to be slightly compressed. At the same time, as the inclined plate (5161) moves downward, the circular hole (5162) opened on its surface will move downward and connect with the conveying tube (5166), wherein the other end of the conveying tube (5166) is connected to the feeder (5167). At this time, the spring (5168) connected to the inner side of the feeder (5167) will be compressed, causing the conveying tube (5166) to pass through the circular hole (5162) and the pressure tube (5163) in turn and squeeze the barrier film (5164). At this time, the barrier film (5164) will be broken, and then the conductive agent inside the feeder (5167) will be transported to each layer of the positive electrode material through the conveying tube (5166); The limiting mechanism (3) comprises a bottom pressing block (31), the bottom pressing block (31) being fixedly connected to the bottom of the battery shell (513), a protective seat (32) being arranged beside the bottom pressing block (31), the protective seat (32) being fixedly connected to the bottom of the inner cavity of the box shell (1), an inclined rod (33) being inserted into the interior of the protective seat (32), one end of the inclined rod (33) being pressed and fitted with the bottom pressing block (31), one end of the inclined rod (33) being fixedly connected to the limiting claw (34) away from the bottom pressing block (31), wherein the portion where the inclined rod (33) is connected to the limiting claw (34) is tough, a hinge seat (35) being rotatably connected to the center portion of the limiting claw (34), the hinge seat (35) being fixedly connected to the outer side of the box shell (1), and the top end of the limiting claw (34) being pressed and fitted with the outer side of the battery shell (513); The heat dissipation mechanism (4) comprises a conical tube (41), the top of the inner cavity of the conical tube (41) is fixedly connected to an inner support (42), the inner portion of the inner support (42) is rotatably connected to a swivel (43), the bottom of the swivel (43) is fixedly connected to a filter screen (44), the outer side of the filter screen (44) is fixedly connected to an elastic ring (45), and the side of the elastic ring (45) away from the filter screen (44) is squeezed and fitted into the interior of the conical tube (41); A heat dissipation component (46) is fixedly connected to the center of the inner side of the filter screen (44), and the heat dissipation component (46) is fixedly connected to the bottom of the box shell (1). A sleeve (47) is fixedly connected to the inner side of the filter screen (44), and an insertion rod (48) is inserted into the end of the sleeve (47) away from the filter screen (44), and an end of the insertion rod (48) away from the sleeve (47) is fixedly connected to a universal seat (49), and an embedding plate (40) is fixedly connected to the bottom of the universal seat (49), and a sleeve plate (401) is slidably adapted on the outer side of the embedding plate (40), and the sleeve plate (401) is fixedly connected to the bottom of the conical tube (41), and the sleeve plate (401) and the bottom of the conical tube (41) are both fixedly connected to a collection frame (402); The heat dissipation assembly (46) comprises a double-connected tube (461), wherein the double-connected tube (461) is fixedly connected to the bottom of the housing (1), the outer end of the double-connected tube (461) is fixedly connected to the conical tube (41), the inner side of the double-connected tube (461) is fixedly connected to a frame (462), the central part of the frame (462) is fixedly connected to a motor (463), the output end of the motor (463) is connected to a fan (464) via a coupling, the output shaft of the motor (463) is fixedly connected to a friction block (4601) at one end close to the fan (464), the outer side of the friction block (4601) is extruded and adapted with an inner shaft (465), the inner shaft (465) is arranged inside the output shaft of the motor (463), the outer end surface of the inner shaft (465) is fixedly connected to a return spring (466), and the end of the return spring (466) away from the inner shaft (465) is fixedly connected to the inner side of the filter screen (44).

2. A lithium iron phosphate battery pack according to claim 1, characterized in that: One end of the double-connected tube (461) away from the conical tube (41) is fixedly connected to a circulation tube (467), and the top of the circulation tube (467) is fixedly connected to an air outlet plate (468), and a square hole is formed on the top of the air outlet plate (468). The top of the inner cavity of the air outlet plate (468) is respectively fixedly connected to a first drainage plate (469) and a second drainage plate (460).

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