Safe explosion-proof lithium ion battery

Abstract

The invention relates to the field of lithium ion batteries, in particular to a safe anti-explosion lithium ion battery which comprises a protection mechanism, and the protection mechanism is used for performing fire extinguishing and cooling treatment on a lithium battery on fire or at an overhigh temperature; the anti-explosion mechanism is used for eliminating bumps on the surface of the lithium battery; the outer side of each explosion-proof mechanism is provided with an inner shell, the center part of the inner shell is provided with a battery assembly, and the explosion-proof mechanisms are symmetrically arranged at the two ends of the battery assembly. According to the safe explosion-proof lithium ion battery, the top end of the safe explosion-proof lithium ion battery can be pulled outwards from the interiors of the two sides of the battery assembly through outward movement of the multi-folded plate; when the battery pack is in use, the battery pack is not limited by the parts and moves downwards, finally, the battery pack enters the central cavity of the hollow shell, and the cooling liquid in the cavities on the two sides of the hollow shell can cool the surface of the battery pack, so that explosion and spontaneous combustion are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of lithium ion batteries, in particular to a safe explosion-proof lithium ion battery. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. During the charge and discharge process, Li+ is intercalated and deintercalated between the two electrodes: when charging, Li+ is deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

[0003] Battery bulging is mainly caused by the generation of gas inside the battery. Most of these gases are generated due to high temperature environment and internal gas diffusion. These gases accumulate inside the battery, increasing the internal pressure of the battery, thus causing battery bulging. Battery bulging is a prelude to thermal runaway, and subsequent problems such as explosion, combustion and electrolyte leakage will occur. At the same time, it also reduces the service life and working performance of the battery. Summary of the invention

[0004] The present invention provides a safe explosion-proof lithium-ion battery to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A safe explosion-proof lithium-ion battery, comprising a protection mechanism, the protection mechanism is used to extinguish the fire and cool down the lithium battery that is on fire or has too high a temperature; An explosion-proof mechanism, which is used to eliminate bulges on the surface of lithium batteries; An inner shell is arranged outside the explosion-proof mechanism, a battery assembly is arranged at the center of the inner shell, the explosion-proof mechanism is symmetrically arranged at both ends of the battery assembly, the bottom of the inner shell is fixedly connected to the protection mechanism, the outer shell is fixedly connected to the outer shell, and a top cover is arranged on the top of the outer shell; A top protective sleeve is arranged at the top of the inner cavity of the inner shell, and side protective plates are symmetrically arranged on both sides of the inner cavity of the inner shell; The protection mechanism comprises a bottom shield, which is arranged at the bottom of the side shield, and a bottom connecting plate is fixedly connected to the outer side of the bottom shield, the bottom connecting plate is slidably matched with the side shield, and the bottom connecting plate is fixedly connected to the inner shell.

[0006] Preferably, a polystyrene plate is fixedly connected to the bottom of the battery assembly, a straight plate is extruded and adapted to the bottom of the polystyrene plate, a trapezoidal bar is fixedly connected to the bottom of the straight plate, the outer side of the trapezoidal bar is slidably adapted to the bottom protective sleeve, an inclined panel is extruded and adapted to the bottom of the trapezoidal bar, a multi-fold plate is fixedly connected to the end of the inclined panel away from the trapezoidal bar, and the number of the multi-fold plates is two.

[0007] Preferably, the bottom of the bottom protective sleeve and the bottom connecting plate are fixedly connected to a hollow shell, wherein the interior of the hollow shell is divided into three cavities, the central cavity is hollow and empty, and the interiors of the two side cavities are fixedly connected to a capsule body, and coolant is placed in the space below the capsule body and in the space surrounded by the side cavities of the hollow shell, the side cavities of the hollow shell and the surface of the capsule body are both socketed with a multi-fold plate, and the end of the multi-fold plate away from the capsule body is inserted into the outside of the battery assembly.

[0008] Preferably, the explosion-proof mechanism includes an explosion-proof component, which is arranged on both ends of the battery component, an intermediate sleeve is provided at the end of the explosion-proof component away from the battery component, and insertion rods are inserted at both ends of the intermediate sleeve, and the end of the insertion rod away from the intermediate sleeve is fixedly connected to the side guard plate, a reflux component is provided on the side of the explosion-proof component, and the reflux component is arranged on the top of the bottom sleeve, and the outer sides of the explosion-proof component and the reflux component are fixedly connected with a small pump body, and the small pump body is fixedly connected to the top of the bottom connecting plate.

[0009] Preferably, the explosion-proof component includes an inner frame, which is fixedly connected to the top of the bottom casing, a movable plate is slidably adapted on one side of the inner frame close to the battery assembly, and a limiting plate is fixedly connected inside the inner frame.

[0010] Preferably, the side of the movable plate away from the battery assembly is fixedly connected with a short rod and an external rod, one end of the short rod away from the movable plate is fixedly connected with a connecting piece, a spring is arranged on the side of the short rod, one end of the spring is fixedly connected to the connecting piece, and the end of the spring away from the connecting piece is fixedly connected to the inner side of the inner frame.

[0011] Preferably, the end of the external connecting rod away from the movable plate is extruded and adapted to be equipped with a branch plate, both sides of the branch plate are fixedly connected with leak-proof spring sheets, the end of the leak-proof spring sheet away from the branch plate is fixedly connected with a cylinder, the outer side of the cylinder is fixedly connected with a cylinder sleeve, and both ends of the cylinder sleeve are fixedly connected to the side guard plates.

[0012] Preferably, one end of the cylinder away from the sleeve is fixedly connected to the small pump body, the inside of the cylinder is fixedly connected to a perforated disk, an engaging block is inserted into the inner side of the perforated disk, the side of the engaging block away from the perforated disk is fixedly connected to a plugging head, and the outer side of the plugging head is fixedly connected to the branch plate.

[0013] Preferably, the reflux assembly includes a support frame, which is fixedly connected to the top of the bottom sleeve, and the central part of the inner side of the support frame is rotatably connected to a flip turn plate, and the outer end surface of the flip turn plate is fixedly connected to a rotary joint, and the end of the rotary joint away from the flip turn plate is fixedly connected to a U-shaped rod, and the end of the U-shaped rod away from the rotary joint is fixedly connected to a tough sheet, wherein the tough sheet is extruded and adapted to the branch plate.

[0014] Preferably, the end of the flip bend plate away from the rotating joint is fixedly connected to an inclined push plate, and the side of the inclined push plate close to the bottom sleeve is extruded and adapted with an insertion plate, the insertion plate is inserted into the surface of the inner frame and extends into the interior thereof, the outer side of the insertion plate is fixedly connected to a plate sleeve, the side of the plate sleeve away from the inner frame is fixedly connected to a return spring, and the end of the return spring away from the plate sleeve is fixedly connected to the bottom sleeve.

[0015] Preferably, a return pipe is fixedly connected to the bottom of the inner frame, one end of the return pipe away from the inner frame is fixedly connected to the small pump body, and the return pipe is sleeved on the surface of the bottom jacket.

[0016] Preferably, the interior of the inner frame is fixedly connected to a plate seat, the interior of the plate seat is rotatably connected to a flow blocking plate, both ends of the flow blocking plate and the end away from the plate seat are fixedly connected to anti-leakage plugs, and the outer side of the anti-leakage plug is squeezed and adapted to the inner wall of the inner frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. As the multi-fold plate moves outward, its top end will be pulled out from the inside of both sides of the battery assembly. At this time, the battery assembly will not be restricted by the above-mentioned components and will move downward. Finally, the battery assembly will enter the central cavity of the hollow shell. At this time, the coolant in the cavity on both sides of the hollow shell will cool the surface of the battery assembly to avoid explosion and spontaneous combustion.

[0018] 2. As the inclined panel and the multi-fold plate move outward, the inclined panel will be retracted into the cavities on both sides of the hollow shell. At this time, the compressed carbon dioxide liquid inside the capsule will be ejected from the junction of the inclined panel and the cavities on both sides of the hollow shell, and enter the central cavity of the hollow shell, thereby playing a triple role of cooling the surface of the upper part of the battery assembly and extinguishing the spontaneous combustion site with carbon dioxide. At the same time, the floating gas will remind the operator that the battery has a fault.

[0019] 3. The coolant inside the small pump body will enter the inner frame through the perforated disk and the cylinder respectively. The inner frame is set on both ends of the battery assembly. Therefore, the coolant inside it will cool down the bulging part of the positive electrode of the battery assembly, and at the same time avoid causing greater danger.

[0020] 4. The plugging plate squeezes the blocking plate, causing it to deflect upward through the plate connector until the blocking plate and the anti-leakage plug block the bottom of the inner cavity of the inner frame, so that the coolant gushing out of the cylinder will remain in the inner frame, thereby achieving the effect of cooling and eliminating the battery bulge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic diagram of the external structure of a safe explosion-proof lithium-ion battery of the present invention.

[0022] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the first layer inside the whole of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the second layer inside the whole of the present invention.

[0025] Figure 5 It is a schematic diagram of the longitudinal section structure of the protection mechanism of the present invention.

[0026] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0027] Figure 7 It is a schematic cross-sectional structure diagram of the protection mechanism of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the explosion-proof mechanism of the present invention.

[0029] Fig. 9 It is a schematic structural diagram of a longitudinal section of the explosion-proof component of the present invention.

[0030] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at point B in the middle.

[0031] Fig.11 It is a schematic cross-sectional structure diagram of some components of the explosion-proof assembly of the present invention.

[0032] Fig.12 It is a schematic diagram of the longitudinal section structure of some components of the explosion-proof assembly of the present invention.

[0033] Fig.13 It is a schematic structural diagram of the reflux assembly of the present invention.

[0034] Fig.14 It is a schematic cross-sectional structural diagram of the reflux assembly of the present invention.

[0035] Fig.15 For the present invention Fig.14 Schematic diagram of the enlarged structure at point C in the middle.

[0036] In the figure: 1, outer shell; 2, top cover; 3, inner shell; 4, battery assembly; 5, protection mechanism; 6, explosion-proof mechanism; 7, side guard plate; 8, top jacket; 51, polystyrene board; 52, straight board; 53, trapezoidal bar; 54, inclined panel; 55, multi-fold plate; 56, hollow shell; 57, capsule; 58, bottom jacket; 59, bottom connecting plate; 61, explosion-proof assembly; 62, middle sleeve; 63, interpenetrating rod; 64, reflux assembly; 65, small pump body; 611, inner frame; 612, movable plate; 613, limit plate; 614, short rod; 61 5. Connecting piece; 616. Spring; 617. External connecting rod; 618. Branch plate; 619. Cylinder sleeve; 610. Cylinder; 6101. Perforated disk; 6102. Fitting block; 6103. Sealing head; 6104. Leak-proof spring; 641. Support frame; 642. Flip bend plate; 643. Rotary joint; 644. U-shaped rod; 645. Tough sheet; 646. Inclined push plate; 647. Insert plate; 648. Plate sleeve; 649. Return spring; 640. Return pipe; 6401. Plate connector; 6402. Flow blocking plate; 6403. Leak-proof plug. DETAILED DESCRIPTION

[0037] 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.

[0038] See also Figures 1 to 15 The present invention provides a technical solution: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, it includes a protection mechanism 5, which is used to extinguish and cool down a lithium battery that is on fire or has an overly high temperature; An explosion-proof mechanism 6, which is used to eliminate bulges on the surface of the lithium battery; An inner shell 3 is arranged outside the explosion-proof mechanism 6, a battery assembly 4 is arranged at the center of the inner shell 3, the explosion-proof mechanism 6 is symmetrically arranged at both ends of the battery assembly 4, the bottom of the inner shell 3 is fixedly connected to the protection mechanism 5, the outer shell 1 is fixedly connected to the outer side of the protection mechanism 5, and a top cover 2 is arranged on the top of the outer shell 1; A top protective sleeve 8 is arranged at the top of the inner cavity of the inner shell 3 , and side protective plates 7 are symmetrically arranged on both sides of the inner cavity of the inner shell 3 .

[0039] The protection mechanism 5 includes a bottom protective sleeve 58, which is arranged at the bottom of the side protective plate 7. A bottom connecting plate 59 is fixedly connected to the outer side of the bottom protective sleeve 58. The bottom connecting plate 59 is slidably fitted with the side protective plate 7 and fixedly connected to the inner shell 3. A polystyrene plate 51 is fixedly connected to the bottom of the battery assembly 4. A straight plate 52 is extruded and fitted at the bottom of the polystyrene plate 51. A trapezoidal bar 53 is fixedly connected to the bottom of the straight plate 52. The outer side of the trapezoidal bar 53 is slidably fitted with the bottom protective sleeve 58. The bottom of the trapezoidal bar 53 is extruded and fitted with an inclined panel 54. The end of the inclined panel 54 away from the trapezoidal bar 53 is fixedly connected to a multi-fold plate 55, wherein the number of the multi-fold plates 55 is two. When the temperature of the surface of the battery assembly 4 is too high and exceeds a predetermined value, or when spontaneous combustion occurs, the polystyrene plate 51 arranged at the bottom of the battery assembly 4 will expand thermally, and the expanded polystyrene plate 51 will expand downward and squeeze the straight plate 52, wherein the bottom of the straight plate 52 is connected to the trapezoidal bar 53, so the trapezoidal bar 53 will move downward and squeeze the inclined plate 54, wherein the contact surface between the trapezoidal bar 53 and the inclined plate 54 is an inclined surface, and the squeezed inclined plate 54 will carry the multi-fold plate 55 connected to the other end thereof to The inclined plate 54, the trapezoidal bar 53, the straight plate 52 and the polystyrene plate 51 initially support and limit the top of the battery assembly 4. However, as the multi-fold plate 55 moves outward, its top end will be pulled outward from the inside on both sides of the battery assembly 4. At this time, the battery assembly 4 will not be restricted by the limitation of the above-mentioned components and move downward. Finally, the battery assembly 4 will enter the central cavity of the hollow shell 56. At this time, the coolant in the cavities on both sides of the hollow shell 56 will cool the surface of the battery assembly 4 to avoid explosion and spontaneous combustion.

[0040] The bottom of the bottom protective sleeve 58 and the bottom connecting plate 59 are fixedly connected with a hollow shell 56, wherein the interior of the hollow shell 56 is divided into three cavities, the central cavity is hollow and empty, and the interiors of the two side cavities are fixedly connected with a capsule 57, and coolant is placed in the space below the capsule 57 and in the space surrounded by the side cavities of the hollow shell 56, and the side cavities of the hollow shell 56 and the surface of the capsule 57 are both connected with the multi-fold plate 55, and the end of the multi-fold plate 55 away from the capsule 57 is inserted into the outside of the battery assembly 4. At the same time, as the inclined panel 54 and the multi-fold plate 55 move outward, the inclined panel 54 will be retracted into the cavities on both sides of the hollow shell 56, wherein the side of the inclined panel 54 in contact with the trapezoidal bar 53 will coincide with the inner wall of the central cavity of the hollow shell 56, but the inclined portion of the inclined panel 54 is longer than the thickness of the central cavity of the hollow shell 56, that is, when the inclined panel 54 is not squeezed by the trapezoidal bar 53, it and the multi-fold plate 55 block and seal both sides of the hollow shell 56, wherein the capsule 57 is sleeved with the multi-fold plate 55, and the carbon dioxide compressed liquid inside the capsule 57 is above the multi-fold plate 55, but as the inclined panel 54 and the multi-fold plate 55 move outward, the carbon dioxide compressed liquid inside the capsule 57 is above the multi-fold plate 55. The outward movement of plate 55 causes the multi-fold plate 55 to be pulled out from the capsule 57, and the inclined plate 54 will replace the multi-fold plate 55 and be inserted into the interior of the hollow shell 56 and the capsule 57 respectively, until the inclined portion of the inclined plate 54 is also inserted into the capsule 57. The capsule 57 has internal pressure, so the carbon dioxide compressed liquid inside the capsule 57 will be ejected from the junction of the inclined plate 54 and the cavity on both sides of the hollow shell 56, and enter the central cavity of the hollow shell 56, thereby playing the triple role of cooling the surface of the upper half of the battery assembly 4 and extinguishing the spontaneous combustion site with carbon dioxide. At the same time, the floating gas will remind the operator that the battery has failed.

[0041] Because the inclined portion of the inclined panel 54 is longer than the thickness of the central cavity of the hollow shell 56, and the expansion volume of the polystyrene board 51 is limited, the trapezoidal bar 53 will not completely embed the inclined panel 54 into the capsule 57. Therefore, the compressed carbon dioxide liquid in the capsule 57 will be sprayed into the center of the hollow shell 56 along the inclined portion of the inclined panel 54.

[0042] like Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12As shown, the explosion-proof mechanism 6 includes an explosion-proof component 61, which is arranged on both ends of the battery component 4, and an intermediate sleeve 62 is arranged at the end of the explosion-proof component 61 away from the battery component 4, and insertion rods 63 are inserted at both ends of the intermediate sleeve 62, and the end of the insertion rod 63 away from the intermediate sleeve 62 is fixedly connected to the side guard plate 7, and a reflux component 64 is arranged on the side of the explosion-proof component 61, and the reflux component 64 is arranged on the top of the bottom sleeve 58, and the outer sides of the explosion-proof component 61 and the reflux component 64 are fixedly connected with a small pump body 65, and the small pump body 65 is fixedly connected to the top of the bottom connecting plate 59.

[0043] The explosion-proof component 61 includes an inner frame 611, which is fixedly connected to the top of the bottom sleeve 58. A movable plate 612 is slidably adapted on one side of the inner frame 611 close to the battery assembly 4. A limiting plate 613 is fixedly connected inside the inner frame 611. A short rod 614 and an external rod 617 are fixedly connected to the side of the movable plate 612 away from the battery assembly 4. A connecting piece 615 is fixedly connected to one end of the short rod 614 away from the movable plate 612. A spring 616 is arranged on the side of the short rod 614, one end of the spring 616 is fixedly connected to the connecting piece 615, and one end of the spring 616 away from the connecting piece 615 is fixedly connected to the inner side of the inner frame 611. There are several movable plates 612, limit plates 613, short rods 614, connecting plates 615, springs 616 and external rods 617, and the movable plates 612 are arranged in a linear array on the inner frame 611, so that when bulging occurs at any point on the positive and negative poles of the battery assembly 4, coolant will enter the interior of the inner frame 611 and cool the bulged part to eliminate the secondary bulging.

[0044] The end of the external connecting rod 617 away from the movable plate 612 is squeezed and adapted to be equipped with a branch plate 618, and both sides of the branch plate 618 are fixedly connected with leak-proof spring pieces 6104, and the end of the leak-proof spring piece 6104 away from the branch plate 618 is fixedly connected with the cylinder 610, and the outer side of the cylinder 610 is fixedly connected with a cylinder sleeve 619, and both ends of the cylinder sleeve 619 are fixedly connected to the side guard plate 7, and the end of the cylinder 610 away from the cylinder sleeve 619 is fixedly connected to the small pump body 65, and the inside of the cylinder 610 is fixedly connected with a perforated disk 6101, and the inner side of the perforated disk 6101 is inserted with a fitting block 6102, and the side of the fitting block 6102 away from the perforated disk 6101 is fixedly connected with a plugging head 6103, and the outer side of the plugging head 6103 is fixedly connected to the branch plate 618. The two ends of the battery assembly 4 are the locations of the positive and negative electrodes. However, the positive and negative electrodes of the lithium battery are the most active places for electrochemical reactions. Therefore, these two parts are easily bulged due to temperature rise. If the positive electrode of the lithium battery bulges, the bulged part will squeeze the movable plate 612 outward, and the squeezed movable plate 612 will move outward with the short rod 614 and the external rod 617 connected to the outside thereof, respectively. The other end of the short rod 614 is connected to the spring 616 through the connecting piece 615, and the spring 616 plays a role in resetting the movable plate 612. Therefore, as the movable plate 612 moves outward, the spring 616 will stretch and lengthen. At the same time, the branch plate 618 arranged on the other end of the external rod 617 will be squeezed and move outward, wherein the branch plate 618 is respectively connected to the anti- The leakproof spring piece 6104 and the plugging head 6103 are connected, so the leakproof spring piece 6104 connected to both ends of the branch plate 618 will be stretched and compressed, and at the same time, the plugging head 6103 will extend outward from the perforated disk 6101 with the engaging block 6102, so that the inner cavity of the cylinder 610 is no longer closed, wherein the leakproof spring piece 6104 is elastic and plays a role in preventing the coolant from overflowing. At this time, the small pump body 65 connected to the cylinder 610, the coolant inside thereof will respectively pass through the perforated disk 6101 and the cylinder 610 into the inner frame 611, and the inner frame 611 is arranged on both ends of the battery assembly 4, so the coolant inside thereof will play a role in cooling down the bulging part of the positive electrode of the battery assembly 4, and at the same time, it also plays a role in avoiding the occurrence of greater dangers.

[0045] like Fig.13 , Fig.14 and Fig.15As shown, the reflux assembly 64 includes a support frame 641, which is fixedly connected to the top of the bottom jacket 58. The center of the inner side of the support frame 641 is rotatably connected to a flip plate 642. The outer end surface of the flip plate 642 is fixedly connected to a rotary joint 643. The end of the rotary joint 643 away from the flip plate 642 is fixedly connected to a U-shaped rod 644. The end of the U-shaped rod 644 away from the rotary joint 643 is fixedly connected to a tough sheet 645, wherein the tough sheet 645 squeezes with the branch plate 618. Press-fit, the end of the flip bend plate 642 away from the rotating joint 643 is fixedly connected with an inclined push plate 646, and the side of the inclined push plate 646 close to the bottom sleeve 58 is squeeze-fitted with an insertion plate 647, the insertion plate 647 is inserted into the surface of the inner frame 611 and extends to the inside thereof, the outer side of the insertion plate 647 is fixedly connected with a plate sleeve 648, and the side of the plate sleeve 648 away from the inner frame 611 is fixedly connected with a return spring 649, and the end of the return spring 649 away from the plate sleeve 648 is fixedly connected to the bottom sleeve 58. As the branch plate 618 moves outward, it squeezes the tough sheet 645. At this time, the U-shaped rod 644 fixedly connected to the two ends of the tough sheet 645 will be forced to move outward, wherein the other end of the U-shaped rod 644 is connected to the flip bend plate 642 through the rotating joint 643. Therefore, the flip bend plate 642 will deflect counterclockwise through the support frame 641, and the inclined push plate 646 fixedly connected to the inner end of the bottom of the flip bend plate 642 will also deflect counterclockwise and hit the interleaved plate 647. The interleaved plate 647 that is hit will carry the plate The sleeve 648 moves toward the inner frame 611 and stretches the reset spring 649, wherein the reset spring 649 resets the insertion plate 647. Then the insertion plate 647 is inserted into the inner frame 611 and squeezes the flow blocking plate 6402, causing the flow blocking plate 6402 to deflect upward through the plate connector 6401 until the flow blocking plate 6402 and the anti-leakage plug 6403 block the bottom of the inner cavity of the inner frame 611, thereby causing the coolant gushing out of the cylinder 610 to remain in the inner frame 611, thereby achieving the effect of cooling and eliminating the battery bulge.

[0046] A return pipe 640 is fixedly connected to the bottom of the inner frame 611, and one end of the return pipe 640 away from the inner frame 611 is fixedly connected to the small pump body 65. The return pipe 640 is sleeved on the surface of the bottom sleeve 58. The interior of the inner frame 611 is fixedly connected to a plate seat 6401, and the interior of the plate seat 6401 is rotatably connected to a flow blocking plate 6402. Both ends of the flow blocking plate 6402 and the end away from the plate seat 6401 are fixedly connected to anti-leakage plugs 6403, and the outer side of the anti-leakage plug 6403 is squeezed and adapted to the inner wall of the inner frame 611. In addition, when the bulge is eliminated, under the action of the spring 616, the entire explosion-proof component 61 will return to its original state, and at the same time, the reset spring 649 inside the reflux component 64 will also restore the reflux component 64 to its original state, and then the flow blocking plate 6402 will deflect downward again, and the coolant inside the inner frame 611 will re-enter the small pump body 65 through the reflux pipe 640 for heat exchange and cooling, and cool down the subsequent bulge. In addition, the main purpose of the above reset is to prevent the coolant from cooling a certain pole all the time, which affects the performance of the battery.

[0047] When the present invention is in use: first, when the temperature of the surface of the battery assembly 4 is too high and higher than a predetermined value, or when spontaneous combustion occurs, the polystyrene plate 51 arranged at the bottom of the battery assembly 4 will expand thermally, and the expanded polystyrene plate 51 will expand downward and squeeze the straight plate 52, wherein the bottom of the straight plate 52 is connected to the trapezoidal bar 53, so the trapezoidal bar 53 will move downward accordingly and squeeze the inclined plate 54, and the squeezed inclined plate 54 will move outward with the multi-fold plate 55 connected to the other end thereof, wherein the inclined plate 54, the trapezoidal bar 53, the straight plate 52 and the polystyrene plate 51 initially support and limit the top of the battery assembly 4 However, as the multi-fold plate 55 moves outward, its top end will be pulled out from the inside of both sides of the battery assembly 4. At this time, the battery assembly 4 will not be restricted and move downward, and finally the battery assembly 4 will enter the central cavity of the hollow shell 56. At this time, the coolant in the cavities on both sides of the hollow shell 56 will cool the surface of the battery assembly 4. At the same time, as the inclined panel 54 and the multi-fold plate 55 move outward, the inclined panel 54 will be retracted into the cavities on both sides of the hollow shell 56, and then the carbon dioxide compressed liquid inside the capsule 57 will be ejected from the junction of the inclined panel 54 and the cavities on both sides of the hollow shell 56, and enter the central cavity of the hollow shell 56.

[0048] The two ends of the battery assembly 4 are the locations of the positive and negative electrodes. However, the positive and negative electrodes of the lithium battery are the most active places for electrochemical reactions. Therefore, these two parts are easily bulged due to temperature rise. If the positive electrode of the lithium battery bulges, the bulged part will squeeze the movable plate 612 outward, and the squeezed movable plate 612 will move outward with the short rod 614 and the external rod 617 connected to the outside thereof, respectively. The other end of the short rod 614 is connected to the spring 616 through the connecting piece 615. Therefore, as the movable plate 612 moves outward, the spring 616 will stretch and lengthen. At the same time, the branch plate 618 set on the other end of the external rod 617 will be affected. It is squeezed and moves outward, wherein the branch plate 618 is respectively connected to the leak-proof spring piece 6104 and the plugging head 6103, so the leak-proof spring pieces 6104 connected to the two ends of the branch plate 618 will be stretched and compressed, and at the same time, the plugging head 6103 will extend outward from the perforated disk 6101 with the engaging block 6102 and move away. At this time, the small pump body 65 connected to the cylinder 610, the coolant inside thereof will respectively pass through the perforated disk 6101 and the cylinder 610 into the inner frame 611, and at this time, the inner frame 611 arranged at both ends of the battery assembly 4, the coolant inside thereof will cool down the positive electrode bulge part of the battery assembly 4.

[0049] As the branch plate 618 moves outward, it squeezes the tough sheet 645. At this time, the U-shaped rod 644 fixedly connected to the two ends of the tough sheet 645 will be forced to move outward, wherein the other end of the U-shaped rod 644 is connected to the flip bend plate 642 through the rotating joint 643. Therefore, the flip bend plate 642 will deflect counterclockwise through the support frame 641, and the inclined push plate 646 fixedly connected to the inner end of the bottom of the flip bend plate 642 will also deflect counterclockwise. The hour hand deflects and hits the insertion plate 647, and the hit insertion plate 647 will move toward the inner frame 611 with the plate sleeve 648 and stretch the return spring 649. Then the insertion plate 647 will be inserted into the inner frame 611 and squeeze the flow blocking plate 6402, causing the flow blocking plate 6402 to deflect upward through the plate connector 6401 until the flow blocking plate 6402 and the anti-leakage plug 6403 block the bottom of the inner cavity of the inner frame 611.

[0050] The above-mentioned embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereto. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work all fall within the protection scope of the present invention.

Claims

1. A safe explosion-proof lithium-ion battery, characterized in that: include: A protection mechanism, which is used to extinguish and cool down lithium batteries that are on fire or have excessive temperatures; An explosion-proof mechanism, which is used to eliminate bulges on the surface of lithium batteries; An inner shell is arranged outside the explosion-proof mechanism, a battery assembly is arranged at the center of the inner shell, the explosion-proof mechanism is symmetrically arranged at both ends of the battery assembly, the bottom of the inner shell is fixedly connected to the protection mechanism, the outer shell is fixedly connected to the outer shell, and a top cover is arranged on the top of the outer shell; A top protective sleeve is arranged at the top of the inner cavity of the inner shell, and side protective plates are symmetrically arranged on both sides of the inner cavity of the inner shell; The protection mechanism includes a bottom sleeve, which is arranged at the bottom of the side guard plate, and a bottom connecting plate is fixedly connected to the outer side of the bottom sleeve, the bottom connecting plate is slidably matched with the side guard plate, and the bottom connecting plate is fixedly connected to the inner shell; The bottom of the battery assembly is fixedly connected with a polystyrene plate, the bottom of the polystyrene plate is extruded and adapted with a straight plate, the bottom of the straight plate is fixedly connected with a trapezoidal bar, the outer side of the trapezoidal bar is slidably adapted with the bottom sheath, the bottom of the trapezoidal bar is extruded and adapted with an inclined panel, the end of the inclined panel away from the trapezoidal bar is fixedly connected with a multi-fold plate, wherein the number of the multi-fold plates is two; The bottom of the bottom protective sleeve and the bottom connecting plate are fixedly connected with a hollow shell, wherein the interior of the hollow shell is divided into three cavities, the central cavity is hollow and empty, and the interiors of the two side cavities are fixedly connected with a capsule body, and coolant is placed in the space below the capsule body and in the space surrounded by the side cavities of the hollow shell, and the side cavities of the hollow shell and the surface of the capsule body are both connected with the multi-fold plate, and the end of the multi-fold plate away from the capsule body is inserted into the outside of the battery assembly.

2. A safe explosion-proof lithium-ion battery according to claim 1, characterized in that: The explosion-proof mechanism includes an explosion-proof component, which is arranged on both ends of the battery component, an intermediate sleeve is arranged at the end of the explosion-proof component away from the battery component, and penetration rods are inserted at both ends of the intermediate sleeve, and the end of the penetration rod away from the intermediate sleeve is fixedly connected to the side guard plate, a reflux component is arranged on the side of the explosion-proof component, and the reflux component is arranged on the top of the bottom sleeve, and the outer sides of the explosion-proof component and the reflux component are fixedly connected with a small pump body, and the small pump body is fixedly connected to the top of the bottom connecting plate.

3. A safe explosion-proof lithium-ion battery according to claim 2, characterized in that: The explosion-proof component comprises an inner frame, which is fixedly connected to the top of the bottom protective sleeve. A movable plate is slidably adapted on one side of the inner frame close to the battery component, and a limiting plate is fixedly connected inside the inner frame.

4. A safe explosion-proof lithium-ion battery according to claim 3, characterized in that: A short rod and an external rod are fixedly connected to one side of the movable plate away from the battery assembly, and one end of the short rod away from the movable plate is fixedly connected to a connecting piece. A spring is arranged beside the short rod, one end of the spring is fixedly connected to the connecting piece, and one end of the spring away from the connecting piece is fixedly connected to the inner side of the inner frame.

5. A safe explosion-proof lithium-ion battery according to claim 4, characterized in that: The end of the external connecting rod away from the movable plate is squeezed and adapted to be equipped with a branch plate, and both sides of the branch plate are fixedly connected with leak-proof spring sheets, and the end of the leak-proof spring sheet away from the branch plate is fixedly connected with a cylinder, and the outer side of the cylinder is fixedly connected with a cylinder sleeve, and both ends of the cylinder sleeve are fixedly connected to the side guard plates.

6. A safe explosion-proof lithium-ion battery according to claim 5, characterized in that: The end of the cylinder away from the sleeve is fixedly connected to the small pump body, the inside of the cylinder is fixedly connected to a perforated disk, the inner side of the perforated disk is plugged with a fitting block, the side of the fitting block away from the perforated disk is fixedly connected to a plugging head, and the outer side of the plugging head is fixedly connected to a branch plate.

7. A safe explosion-proof lithium-ion battery according to claim 2, characterized in that: The reflux assembly includes a support frame, which is fixedly connected to the top of the bottom sleeve, and the central part of the inner side of the support frame is rotatably connected to a flip turn plate, and the outer end surface of the flip turn plate is fixedly connected to a rotary joint, and the end of the rotary joint away from the flip turn plate is fixedly connected to a U-shaped rod, and the end of the U-shaped rod away from the rotary joint is fixedly connected to a tough sheet, wherein the tough sheet is extruded and adapted to the branch plate.

8. A safe explosion-proof lithium-ion battery according to claim 7, characterized in that: The end of the flip bend plate away from the rotating joint is fixedly connected to an inclined push plate, and the side of the inclined push plate close to the bottom sleeve is squeezed and adapted with an insertion plate, the insertion plate is inserted into the surface of the inner frame and extends into the interior thereof, the outer side of the insertion plate is fixedly connected to a plate sleeve, and the side of the plate sleeve away from the inner frame is fixedly connected to a return spring, and the end of the return spring away from the plate sleeve is fixedly connected to the bottom sleeve.

9. A safe explosion-proof lithium-ion battery according to claim 5, characterized in that: The bottom of the inner frame is fixedly connected with a return pipe, one end of the return pipe away from the inner frame is fixedly connected with the small pump body, and the return pipe is sleeved on the surface of the bottom sleeve.

10. The safe explosion-proof lithium-ion battery according to claim 5, characterized in that: The interior of the inner frame is fixedly connected to a plate seat, the interior of the plate seat is rotatably connected to a flow blocking plate, both ends of the flow blocking plate and an end away from the plate seat are fixedly connected to anti-leakage plugs, and the outer side of the anti-leakage plug is squeezed and adapted to the inner wall of the inner frame.

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