A protective structure for lithium battery pack

Abstract

The present invention discloses a protective structure for a lithium battery pack, which relates to the technical field of lithium battery pack protection. The structure comprises a temperature detection mechanism and a lithium battery body installed inside the temperature detection mechanism. A safety protection mechanism is provided at the bottom of the temperature detection mechanism, and a protective airbag is provided inside the safety protection mechanism. The temperature detection mechanism comprises a first protective bracket, heat dissipation mesh plates are symmetrically installed on both sides of the first protective bracket, and a conductive connector is symmetrically installed front and back inside the first protective bracket, wherein an engaging bracket is fixedly installed on one side of the first protective bracket close to the conductive connector, and the fixed side plate is moved inward. Under the action of the support baffle and the through hole, the support hook can slide. When the support hook is separated from the support baffle, the support hook rises under the tension of the connecting spring, and the annular connecting line moves to the top of the conductive connector to connect the line.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery pack protection, in particular to a protection structure for a lithium battery pack. Background Art

[0002] Lithium batteries have the advantages of stable discharge voltage, wide operating temperature range, low self-discharge rate, long storage life, no memory effect, small size, light weight and pollution-free. They have gradually replaced lead-acid batteries and nickel-cadmium batteries and become the mainstream of power batteries. Lithium battery packs are composed of several lithium batteries connected in series and parallel. In order to better protect the lithium battery, a protective casing is usually installed on the lithium battery when in use.

[0003] Announcement No. CN218677384U discloses a protective structure for a small lithium battery pack. A protective plate is provided on the side of the protective box body. The protective plate is a high-temperature resistant elastic rubber plate. It is resistant to high temperatures and has a good buffering effect. It has strong elasticity and obvious rebound effect and is almost not deformed due to collision. The protective plate is provided with heat dissipation holes to dissipate heat when the lithium battery pack is working, ensuring a good working environment for the lithium battery. A radiator is provided in the protective box body to dissipate heat inside the protective box body, thereby improving the heat dissipation performance. A spring seat and a shock-absorbing spring are provided at the bottom of the support rod to prevent damage to the lithium battery due to collisions between the upper and lower parts of the protective box body due to severe vibration, thereby improving the overall buffering and shock-resistant performance of the protective box body. The device has a simple structure, is easy to operate, and is easy to disassemble. It is convenient for installation, disassembly, and transportation of small lithium battery packs, thereby increasing the service life of the lithium battery packs. However, the following problems still exist in the actual use of this patent:

[0004] Although the protective structure for the small lithium battery pack can achieve the safety protection of the lithium battery pack, during the use of the lithium battery pack, a single lithium battery may be damaged due to its own quality or external reasons, which not only affects the service life of the lithium battery, but also may cause the spontaneous combustion of the single lithium battery in severe cases, thereby having a certain impact on other lithium batteries. No relevant protective structure is set to protect the single lithium battery, which may cause the entire lithium battery pack to burn. When the entire lithium battery pack burns, no corresponding detachment protective structure is set to protect the lithium battery pack, which may cause the device using the lithium battery pack to burn, which is not conducive to the safety of the entire device.

[0005] Therefore, a protective structure for a lithium battery pack is proposed to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a protective structure for a lithium battery pack to solve the problem raised in the above background technology that during the use of the lithium battery pack, a single lithium battery is damaged due to its own quality or external reasons, which not only affects the service life of the lithium battery, but also causes the spontaneous combustion of the single lithium battery in severe cases, thereby causing a certain impact on other lithium batteries. No relevant protective structure is set to protect the single lithium battery, which leads to the burning of the entire lithium battery pack. When the entire lithium battery pack burns, no corresponding detachment protective structure is set to protect the lithium battery pack, which will cause the device using the lithium battery pack to burn, which is not conducive to the safety of the entire device.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a protective structure for a lithium battery pack, comprising a temperature detection mechanism and a lithium battery body installed inside the temperature detection mechanism;

[0008] A safety protection mechanism is provided at the bottom of the temperature detection mechanism, and a protective airbag is provided inside the safety protection mechanism;

[0009] Also includes:

[0010] The temperature detection mechanism includes a first protective bracket, heat dissipation mesh plates are symmetrically installed on both sides of the first protective bracket, and conductive connectors are symmetrically installed front and back inside the first protective bracket;

[0011] Among them, a meshing bracket is fixedly installed on one side of the first protective bracket close to the conductive connector, and a meshing gear is rotatably connected to the inner center position of the meshing bracket, and meshing racks are meshedly connected on both sides of the meshing gear;

[0012] Among them, the ends of the two meshing racks are fixedly installed with connecting springs, the top of the top meshing rack is fixedly installed with an annular connecting line, and the bottom of the bottom meshing rack is fixedly installed with a supporting hook.

[0013] Preferably, a first sprocket limit cover is fixedly installed on one side of the bottom of the first protective bracket, an opening and closing motor is fixedly installed on one side of the inner side of the first sprocket limit cover, the output end of the opening and closing motor is fixedly connected to the first sprocket transmission assembly, an opening and closing bidirectional threaded rod is symmetrically installed on one side of the first sprocket transmission assembly, the outer sides of the two opening and closing bidirectional threaded rods are symmetrically threaded with opening and closing threaded sleeves, and the tops of the two opening and closing threaded sleeves are fixedly installed with opening and closing support plates.

[0014] Preferably, a fixed side plate is fixedly installed on one side of the opening and closing support plate, a support baffle is fixedly installed on the top of the fixed side plate, a through hole is opened on the top of the fixed side plate, the support hook is slidably connected to the fixed side plate through the through hole, the lithium battery body is placed on the top of the opening and closing support plate, and connecting wires are symmetrically installed at both ends of the lithium battery body, and the connecting wires are snap-connected with the conductive connector.

[0015] Preferably, a second sprocket limit cover is fixedly installed on one side of the top of the first protective bracket, one end of the second sprocket limit cover is rotatably connected to an expansion knob, the end of the expansion knob is fixedly connected to a second link transmission assembly, and an expansion bidirectional threaded rod is symmetrically installed on one side of the second link transmission assembly, the outer sides of the two expansion bidirectional threaded rods are symmetrically threaded with expansion thread sleeves, and an expansion baffle is fixedly installed on the top of the two expansion thread sleeves, and the expansion baffle is slidably connected to the first protective bracket.

[0016] Preferably, clamping bases are symmetrically installed on both sides of the top of the first protective bracket, a connecting slide groove is opened at the inner center position of the clamping base, the top of the clamping base is symmetrically rotatably connected to the clamping rotating rod, the tops of the two clamping rotating rods are rotatably connected to the clamping sliding sleeves, the inside of the clamping sliding sleeves is slidably connected to the clamping sliding rod, the outer side of the clamping sliding rod is fixedly installed with a clamping bracket, a clamping spring is fixedly installed on one side of the clamping sliding sleeve, and the top of the clamping sliding sleeve is fixedly installed with a clamping arm.

[0017] Preferably, the safety protection mechanism includes a second protection bracket, a closed sliding rod is fixedly installed on the inner four sides of the second protection bracket, the outer side of the closed sliding rod is slidably connected to a closed sliding sleeve, the bottom of the closed sliding sleeve is fixedly installed with a closed spring, the top of the closed sliding sleeve is rotatably connected to a closed rotating rod, the top of the closed rotating rod is rotatably connected to a closed baffle, the bottom of the closed baffle is symmetrically installed with a connecting hinge, and the connecting hinge is rotatably connected to the second protection bracket.

[0018] Preferably, a limiting base is fixedly installed on the bottom of the second protective bracket, and both sides of the top of the limiting base are symmetrically connected to the limiting rotation rod, the top of the limiting rotation rod is rotatably connected to the limiting sliding sleeve, the inner part of the limiting sliding sleeve is slidably connected to the limiting sliding rod, a limiting spring is fixedly installed on one side of the limiting sliding sleeve, a limiting bracket is fixedly installed on the top of the limiting sliding sleeve, and a limiting splint is fixedly installed on the outer side of the limiting sliding rod.

[0019] Preferably, connecting sliding rods are symmetrically installed on both sides of the bottom of the limiting clamp, a support spring is fixedly installed on the outer side of the limiting base close to the connecting sliding rod, a connecting bottom plate is fixedly installed on the bottom of the support spring, a connecting rack is fixedly installed around the top of the connecting bottom plate, one side of the connecting rack is meshed with a rotating gear, and a rotating baffle is fixedly installed between the two rotating gears.

[0020] Preferably, the second protective bracket is fixedly installed with sealing baffles near the top and bottom of the rotating baffle, and connecting blocks are fixedly installed on both sides of the connecting base plate. Connecting columns are symmetrically installed on the top of the connecting blocks, and the connecting columns are slidably connected to the clamping base through connecting slides. The connecting columns are fixedly installed on the bottom of the clamping bracket, and the protective airbag is placed on the top of the limiting splint, and airbag plugs are snap-connected on both sides of the protective airbag.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the protective structure for a lithium battery pack moves the fixed side plate inward, and under the action of the support baffle and the through hole, the support hook can slide. When the support hook is separated from the support baffle, the support hook is lifted under the tension of the connecting spring, and the annular connecting wire moves to the top of the conductive connector to connect the line. The rotation of the rotating baffle can be achieved by utilizing the characteristics of the meshing connection between the connecting rack and the rotating gear. Under the action of the sealing baffle, the second protective bracket can be closed. In the event of spontaneous combustion or explosion of the lithium battery body, safety protection can be provided by the second protective bracket. The specific contents are as follows:

[0022] 1. By setting up a temperature detection mechanism, not only can the heat dissipation mesh plate be used to ventilate and dissipate heat inside the first protective bracket, but the conductive connector and the connecting wire can be used to connect the lithium battery body in series. A temperature sensor is provided inside the first protective bracket. When the temperature of the lithium battery body exceeds 60 degrees Celsius, it may cause the chemical reaction inside the battery to intensify, causing heat accumulation, and eventually may cause the battery to burn or explode. Therefore, the opening and closing motor is started by the PLC controller to drive the first sprocket transmission assembly and the opening and closing two-way threaded rod to rotate, so that the opening and closing threaded sleeve moves relative to the outside of the opening and closing two-way threaded rod while driving the opening and closing support plate and the fixed side plate to move relative to each other, so that the lithium battery body can fall. At this time, the connecting wire is separated from the conductive connector, the lithium battery body is disconnected, and falls into the second protective bracket at the bottom for isolation, thereby improving the safety of the battery pack. At the same time, the fixed side plate is moved inward, and under the action of the support baffle and the through hole, the support hook can slide. When the support hook is separated from the support baffle, Under the pulling force of the connecting spring, the support hook rises, and at the same time, the annular connecting wire moves to the top of the conductive connector to connect the line. When one of the lithium battery bodies of the lithium battery pack is damaged, the lithium battery body can be used normally. The temperature sensor and PLC controller are existing technologies, so this case does not provide a detailed description of their specific structure and working principle. The second link transmission assembly and the expansion bidirectional threaded rod are driven to rotate by the expansion knob, so that the expansion threaded sleeve drives the expansion baffle to move relative to each other, and the top of the first protective bracket can be opened to install and remove the lithium battery body. When all lithium batteries are at risk of high-temperature explosion, the connecting column drives the clamping bracket to descend. Under the action of the clamping rotating rod, the clamping sliding sleeve can slide on the outside of the clamping sliding rod, so that the clamping sliding sleeve drives the clamping arm to expand, and the lithium battery pack can be automatically separated from the user body, thereby providing safety protection for the user body and preventing the lithium battery pack from spontaneous combustion or explosion, thereby causing damage to the user body.

[0023] 2. By setting up a safety protection mechanism, not only can the elastic force of the closed spring be utilized to make the high-temperature lithium battery body fall to the top of the closed baffle, but under the action of the closed rotating rod, the closed baffle is slowly rotated, so that the lithium battery body falls to the top of the protective airbag, and the airbag plug is squeezed out, and the air inside the protective airbag slowly flows out, and finally the lithium battery body falls to the top of the limiting splint, and the gravity of the lithium battery body is used to drive the limiting splint to descend. Under the action of the limiting rotating rod, the limiting sliding sleeve can slide on the outside of the limiting sliding rod, driving the limiting bracket to move relatively, thereby limiting the lithium battery body. When the rotating baffle is in an inclined state, the normal heat dissipation of the lithium battery body can be achieved. When all the lithium battery bodies have high temperature, under the action of gravity, the connecting sliding rod squeezes the connecting bottom plate to pull the supporting spring to extend, and at the same time the connecting bottom plate drives the connecting rack to descend. The rotation of the rotating baffle can be achieved by utilizing the characteristics of the meshing connection between the connecting rack and the rotating gear. Under the action of the sealing baffle, the second protective bracket can be closed. In the case of spontaneous combustion or explosion of the lithium battery body, the second protective bracket can be used for safety protection, thereby reducing the impact force generated by the explosion of the lithium battery body and improving the safety of the lithium battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 Schematic diagram of the three-dimensional structure of the temperature detection mechanism in the present invention;

[0026] Figure 3 Schematic diagram of the three-dimensional structure of the cross section of the first protective bracket in the present invention;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the annular connecting line and the support hook in the present invention;

[0028] Figure 5 Schematic diagram of the three-dimensional structure of the cross section of the meshing bracket in the present invention;

[0029] Figure 6 Schematic diagram of the three-dimensional structure of the unfolded baffle in the present invention;

[0030] Figure 7 Schematic diagram of the three-dimensional structure of the clamping bracket in the present invention;

[0031] Figure 8 Schematic diagram of the three-dimensional structure of the safety protection mechanism in the present invention;

[0032] Figure 9 Schematic diagram of the three-dimensional structure of the cross section of the second protective bracket in the present invention;

[0033] Figure 10Schematic diagram of the three-dimensional structure of the closed baffle in the present invention;

[0034] Figure 11 It is a schematic diagram of the three-dimensional structure of the cross section of the limiting splint in the present invention.

[0035] In the figure: 1. Temperature detection mechanism; 101. First protective bracket; 102. Heat dissipation mesh plate; 103. Conductive connector; 104. Engaging bracket; 105. Engaging gear; 106. Engaging rack; 107. Connecting spring; 108. Ring connecting wire; 109. Support hook; 110. First sprocket limit cover; 111. Opening and closing motor; 112. First sprocket transmission assembly; 113. Opening and closing bidirectional threaded rod; 114 , opening and closing threaded sleeve; 115, opening and closing support plate; 116, fixed side plate; 117, support baffle; 118, through hole; 119, lithium battery body; 120, connecting wire; 121, second sprocket limit cover; 122, expansion knob; 123, second link transmission assembly; 124, expansion bidirectional threaded rod; 125, expansion threaded sleeve; 126, expansion baffle; 127, clamping base; 128, connecting slide; 129 , clamping rotating rod; 130, clamping sliding sleeve; 131, clamping sliding rod; 132, clamping spring; 133, clamping bracket; 134, clamping arm; 2, safety protection mechanism; 201, second protection bracket; 202, closed sliding rod; 203, closed sliding sleeve; 204, closed spring; 205, closed rotating rod; 206, closed baffle; 207, connecting hinge; 208, limit base; 209, limit rotating rod Moving rod; 210, limiting sliding sleeve; 211, limiting sliding rod; 212, limiting spring; 213, limiting bracket; 214, limiting splint; 215, connecting sliding rod; 216, supporting spring; 217, connecting base plate; 218, connecting rack; 219, rotating gear; 220, rotating baffle; 221, sealing baffle; 222, connecting block; 223, connecting column; 224, protective airbag; 225, airbag plug. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 5The present invention provides a technical solution: a protective structure for a lithium battery pack, comprising a temperature detection mechanism 1, and a lithium battery body 119 installed inside the temperature detection mechanism 1, a safety protection mechanism 2 is provided at the bottom of the temperature detection mechanism 1, and a protective airbag 224 is provided inside the safety protection mechanism 2, the temperature detection mechanism 1 comprises a first protective bracket 101, heat dissipation mesh plates 102 are symmetrically installed on both sides of the first protective bracket 101, and conductive connectors 103 are symmetrically installed inside the first protective bracket 101, wherein a meshing bracket 104 is fixedly installed on one side of the first protective bracket 101 close to the conductive connector 103, and a meshing gear 105 is rotatably connected to the inner center position of the meshing bracket 104, and the meshing gear 105 The two sides of the first protective bracket 101 are meshed and connected with meshing racks 106, wherein the ends of the two meshing racks 106 are fixedly installed with connecting springs 107, the top of the top meshing rack 106 is fixedly installed with a ring connecting line 108, and the bottom of the bottom meshing rack 106 is fixedly installed with a supporting hook 109. A first sprocket limiting cover 110 is fixedly installed on one side of the bottom of the first protective bracket 101, and an opening and closing motor 111 is fixedly installed on one side of the inner side of the first sprocket limiting cover 110. The output end of the opening and closing motor 111 is fixedly connected to the first sprocket transmission assembly 112, and an opening and closing bidirectional threaded rod 113 is symmetrically installed on one side of the first sprocket transmission assembly 112. The outer sides of the two opening and closing bidirectional threaded rods 113 are symmetrically threaded with opening and closing threaded sleeves 114. The top of each opening and closing threaded sleeve 114 is fixedly installed with an opening and closing support plate 115, and a fixed side plate 116 is fixedly installed on one side of the opening and closing support plate 115. A support baffle 117 is fixedly installed on the top of the fixed side plate 116. A through hole 118 is provided on the top of the fixed side plate 116. The support hook 109 is slidably connected to the fixed side plate 116 through the through hole 118. The lithium battery body 119 is placed on the top of the opening and closing support plate 115. Connecting wires 120 are symmetrically installed at both ends of the lithium battery body 119. The heat dissipation mesh plate 102 is used to ventilate and dissipate heat to the interior of the first protective bracket 101. The conductive connector 103 and the connecting wire 120 can realize the series connection of the lithium battery body 119. The interior of the first protective bracket 101 is provided with Temperature sensor. When the temperature of the lithium battery body 119 exceeds sixty degrees Celsius, it may cause the chemical reaction inside the battery to intensify, causing heat accumulation, and eventually causing the battery to burn or explode. Therefore, the opening and closing motor 111 is started by the PLC controller to drive the first sprocket transmission assembly 112 and the opening and closing bidirectional threaded rod 113 to rotate, so that the opening and closing threaded sleeve 114 moves relative to the outside of the opening and closing bidirectional threaded rod 113, while driving the opening and closing support plate 115 and the fixed side plate 116 to move relative to each other, which can make the lithium battery body 119 fall. At this time, the connecting wire 120 is separated from the conductive connector 103, the lithium battery body 119 is disconnected, and falls into the second protective bracket 201 at the bottom for isolation, thereby improving the safety of the battery pack.

[0038] See also Figure 3-Figure 6 , the connecting wire 120 is engaged with the conductive connector 103, a second sprocket limiting cover 121 is fixedly installed on one side of the top of the first protective bracket 101, one end of the second sprocket limiting cover 121 is rotatably connected to the expansion knob 122, the end of the expansion knob 122 is fixedly connected to the second link transmission component 123, and an expansion bidirectional threaded rod 124 is symmetrically installed on one side of the second link transmission component 123. The outer sides of the two expansion bidirectional threaded rods 124 are symmetrically threaded with expansion thread sleeves 125, and the tops of the two expansion thread sleeves 125 are fixedly installed with an expansion baffle 126. The expansion baffle 126 is slidably connected to the first protective bracket 101 and moves the fixed side plate 116 inward. Under the action of the support baffle 117 and the through hole 118, the support hook 109 can be realized. When the support hook 109 is separated from the support baffle 117, the support hook 109 rises under the tension of the connecting spring 107, and the annular connecting wire 108 moves to the top of the conductive connector 103 to connect the line. When one of the lithium battery bodies 119 of the lithium battery pack is damaged, the lithium battery body 119 can be used normally. The temperature sensor and PLC controller are existing technologies, so this case does not provide a detailed description of their specific structure and working principle. The second link transmission assembly 123 and the unfolding bidirectional threaded rod 124 are driven to rotate by the unfolding knob 122, so that the unfolding threaded sleeve 125 drives the unfolding baffle 126 to move relative to each other, and the top of the first protective bracket 101 can be opened, thereby performing the installation and disassembly of the lithium battery body 119.

[0039] See also Figure 3-Figure 7 The first protective bracket 101 is symmetrically mounted with clamping bases 127 on both sides of its top. A connecting slot 128 is provided at the inner center of the clamping base 127. The top of the clamping base 127 is symmetrically connected to a clamping rotating rod 129. The tops of the two clamping rotating rods 129 are both rotatably connected to a clamping sliding sleeve 130. The inside of the clamping sliding sleeve 130 is slidably connected to a clamping sliding rod 131. A clamping bracket 133 is fixedly mounted on the outer side of the clamping sliding rod 131. A clamping spring 132 is fixedly mounted on one side of the clamping sliding sleeve 130. A clamping arm 134 is fixedly installed on the top of the clamping sliding sleeve 130. When all lithium batteries are at risk of high-temperature explosion, the connecting column 223 drives the clamping bracket 133 to descend. Under the action of the clamping rotating rod 129, the clamping sliding sleeve 130 can slide on the outside of the clamping sliding rod 131, so that the clamping sliding sleeve 130 drives the clamping arm 134 to expand, and the lithium battery pack can be automatically separated from the user body, thereby providing safety protection for the user body and avoiding spontaneous combustion or explosion of the lithium battery pack, which would cause damage to the user body.

[0040] See also Figure 1 、 Figures 8-10 The safety protection mechanism 2 includes a second protection bracket 201, on which a closed sliding rod 202 is fixedly installed around the inside of the second protection bracket 201, a closed sliding sleeve 203 is slidably connected to the outside of the closed sliding rod 202, a closed spring 204 is fixedly installed at the bottom of the closed sliding sleeve 203, the top of the closed sliding sleeve 203 is rotatably connected to a closed rotating rod 205, the top of the closed rotating rod 205 is rotatably connected to a closed baffle 206, and a connecting hinge 207 is symmetrically installed at the bottom of the closed baffle 206, which is rotatably connected to the second protection bracket 201. 1 is fixedly installed with a limited base 208 at the bottom, and both sides of the top of the limited base 208 are symmetrically connected to the limited rotation rod 209, and the top of the limited rotation rod 209 is rotatably connected to the limited sliding sleeve 210. The inner sliding sleeve 210 is slidably connected to the limited sliding rod 211, and a limited spring 212 is fixedly installed on one side of the limited sliding sleeve 210. A limited bracket 213 is fixedly installed on the top of the limited sliding sleeve 210, and a limited splint 214 is fixedly installed on the outer side of the limited sliding rod 211. The bottom of the limited splint 214 is symmetrically installed with connecting sliding rods 215. 8 A support spring 216 is fixedly installed near the outer side of the connecting sliding rod 215, and a connecting bottom plate 217 is fixedly installed at the bottom of the support spring 216. A connecting rack 218 is fixedly installed around the top of the connecting bottom plate 217. A rotating gear 219 is meshed and connected to one side of the connecting rack 218. A rotating baffle 220 is fixedly installed between the two rotating gears 219. The elastic force of the closing spring 204 is used to make the high-temperature lithium battery body 119 fall onto the top of the closed baffle 206. Under the action of the closed rotating rod 205, the closed baffle 206 is slowly rotated, so that the lithium battery body 119 19 falls into the top of the protective airbag 224 and squeezes out the airbag plug 225. The air inside the protective airbag 224 slowly flows out, and finally the lithium battery body 119 falls into the top of the limiting clamp 214. The gravity of the lithium battery body 119 itself drives the limiting clamp 214 to descend. Under the action of the limiting rotating rod 209, the limiting sliding sleeve 210 can drive the limiting bracket 213 to move relative to it when sliding on the outside of the limiting sliding rod 211, thereby limiting the lithium battery body 119. At this time, the rotating baffle 220 is in an inclined state, which can achieve normal heat dissipation of the lithium battery body 119.

[0041] See also Figures 9-11, the second protective bracket 201 is fixedly installed with a sealing baffle 221 on the top and bottom near the rotating baffle 220, and a connecting block 222 is fixedly installed on both sides of the connecting bottom plate 217. The top of the connecting block 222 is symmetrically installed with a connecting column 223, and the connecting column 223 is slidably connected to the clamping base 127 through the connecting slide 128. The connecting column 223 is fixedly installed at the bottom of the clamping bracket 133, and the protective airbag 224 is placed on the top of the limiting clamping plate 214. The two sides of the protective airbag 224 are snap-connected with the airbag plug 225. When all lithium battery bodies 119 have high temperature phenomena, under gravity Under the action of , the connecting sliding rod 215 squeezes the connecting bottom plate 217 to pull the supporting spring 216 to extend, and at the same time the connecting bottom plate 217 drives the connecting rack 218 to descend. The characteristic of the meshing connection between the connecting rack 218 and the rotating gear 219 can realize the rotation of the rotating baffle 220. Under the action of the sealing baffle 221, the second protective bracket 201 can be closed. In the case of spontaneous combustion or explosion of the lithium battery body 119, the second protective bracket 201 can be used for safety protection, thereby reducing the impact force caused by the explosion of the lithium battery body 119 and improving the safety of the lithium battery pack.

[0042] Working principle: Before using this kind of protective structure for lithium battery pack, it is necessary to check the overall condition of the device to ensure that it can work normally. Figure 1 - Figure 11 As shown, first, the heat dissipation mesh plate 102 is used to ventilate and dissipate heat inside the first protective bracket 101, and the conductive connector 103 and the connecting wire 120 can be used to connect the lithium battery body 119 in series. A temperature sensor is provided inside the first protective bracket 101. When the temperature of the lithium battery body 119 exceeds sixty degrees Celsius, it may cause the chemical reaction inside the battery to intensify, causing heat accumulation, and eventually may cause the battery to burn or explode. Therefore, the opening and closing motor 111 is started by the PLC controller to drive the first sprocket transmission assembly 112 and the opening and closing bidirectional threaded rod 113 to rotate, so that the opening and closing threaded sleeve 114 moves relative to the outside of the opening and closing bidirectional threaded rod 113, while driving the opening and closing support plate 115 and the fixed side plate 116 to move relative to each other, so that the lithium battery body 119 can fall. At this time, the connecting wire 120 is separated from the conductive connector 103, the lithium battery body 119 is disconnected, and falls into the second protective bracket 201 at the bottom for isolation, thereby improving the safety of the battery pack.

[0043] Secondly, the fixed side plate 116 is moved inward, and the sliding of the support hook 109 can be achieved under the action of the support baffle 117 and the through hole 118. When the support hook 109 is separated from the support baffle 117, the support hook 109 rises under the tension of the connecting spring 107, and the annular connecting wire 108 moves to the top of the conductive connector 103 to connect the line. When one of the lithium battery bodies 119 of the lithium battery pack is damaged, the lithium battery body 119 can be used normally. The temperature sensor and PLC controller are existing technologies, so this case does not describe their specific structure and working principle in detail. By unfolding the knob 122, the second link transmission component 123 and The bidirectional threaded rod 124 is unfolded and rotated, so that the unfolding threaded sleeve 125 drives the unfolding baffle 126 to move relative to each other, and the top of the first protective bracket 101 can be opened, so that the lithium battery body 119 can be installed and disassembled. When all lithium batteries are at risk of high-temperature explosion, the connecting column 223 drives the clamping bracket 133 to descend. Under the action of the clamping rotating rod 129, the clamping sliding sleeve 130 can slide on the outside of the clamping sliding rod 131, so that the clamping sliding sleeve 130 drives the clamping arm 134 to unfold, and the lithium battery pack can be automatically separated from the user body, thereby providing safety protection for the user body and avoiding spontaneous combustion or explosion of the lithium battery pack, which may cause damage to the user body.

[0044] Finally, by utilizing the elastic force of the closing spring 204, when the high-temperature lithium battery body 119 falls onto the top of the closing baffle 206, under the action of the closing rotating rod 205, the closing baffle 206 is slowly rotated, causing the lithium battery body 119 to fall onto the top of the protective airbag 224 and squeeze out the airbag plug 225. The air inside the protective airbag 224 slowly flows out, and finally the lithium battery body 119 falls onto the top of the limiting clamping plate 214. The gravity of the lithium battery body 119 itself drives the limiting clamping plate 214 to descend. Under the action of the limiting rotating rod 209, the limiting sliding sleeve 210 can slide on the outside of the limiting sliding rod 211, driving the limiting bracket 213 to move relatively, thereby limiting the lithium battery body 119. At this time, the rotating baffle 205 The plate 220 is in an inclined state, which can achieve normal heat dissipation of the lithium battery body 119. When all the lithium battery bodies 119 have high temperatures, under the action of gravity, the connecting sliding rod 215 squeezes the connecting bottom plate 217 to pull the supporting spring 216 to extend, and at the same time, the connecting bottom plate 217 drives the connecting rack 218 to descend. By utilizing the characteristics of the meshing connection between the connecting rack 218 and the rotating gear 219, the rotation of the rotating baffle 220 can be achieved. Under the action of the sealing baffle 221, the second protective bracket 201 can be closed. In the case of spontaneous combustion or explosion of the lithium battery body 119, safety protection can be provided by the second protective bracket 201, thereby reducing the impact force generated by the explosion of the lithium battery body 119 and improving the safety of the lithium battery pack.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A protective structure for a lithium battery pack, comprising a temperature detection mechanism and a lithium battery body installed inside the temperature detection mechanism; A safety protection mechanism is provided at the bottom of the temperature detection mechanism, and a protective airbag is provided inside the safety protection mechanism; It is characterized in that Also includes: The temperature detection mechanism includes a first protective bracket, heat dissipation mesh plates are symmetrically installed on both sides of the first protective bracket, and conductive connectors are symmetrically installed front and back inside the first protective bracket; Among them, a meshing bracket is fixedly installed on one side of the first protective bracket close to the conductive connector, and a meshing gear is rotatably connected to the inner center position of the meshing bracket, and meshing racks are meshedly connected on both sides of the meshing gear; Wherein, the ends of the two meshing racks are fixedly installed with connecting springs, the top of the top meshing rack is fixedly installed with a ring connecting line, and the bottom of the bottom meshing rack is fixedly installed with a supporting hook; When the temperature of the lithium battery body exceeds 60 degrees Celsius, the PLC controller controls the bottom of the temperature detection mechanism to open, causing the lithium battery body to fall into the safety protection mechanism for isolation, thereby improving the safety of the battery pack.

2. The protective structure for a lithium battery pack according to claim 1, characterized in that: A first sprocket limit cover is fixedly installed on one side of the bottom of the first protective bracket, an opening and closing motor is fixedly installed on one side of the interior of the first sprocket limit cover, an output end of the opening and closing motor is fixedly connected to a first sprocket transmission assembly, an opening and closing bidirectional threaded rod is symmetrically installed on one side of the first sprocket transmission assembly, the outer sides of the two opening and closing bidirectional threaded rods are symmetrically threaded with opening and closing threaded sleeves, and an opening and closing support plate is fixedly installed on the top of the two opening and closing threaded sleeves.

3. The protective structure for a lithium battery pack according to claim 2, characterized in that: A fixed side plate is fixedly installed on one side of the opening and closing support plate, a support baffle is fixedly installed on the top of the fixed side plate, a through hole is opened on the top of the fixed side plate, the support hook is slidably connected to the fixed side plate through the through hole, the lithium battery body is placed on the top of the opening and closing support plate, and connecting wires are symmetrically installed at both ends of the lithium battery body, and the connecting wires are snap-connected with the conductive connector.

4. The protective structure for a lithium battery pack according to claim 3, characterized in that: A second sprocket limit cover is fixedly installed on one side of the top of the first protective bracket, one end of the second sprocket limit cover is rotatably connected to an expansion knob, the end of the expansion knob is fixedly connected to a second link transmission assembly, and an expansion bidirectional threaded rod is symmetrically installed on one side of the second link transmission assembly, the outer sides of the two expansion bidirectional threaded rods are symmetrically threaded with expansion thread sleeves, and an expansion baffle is fixedly installed on the top of the two expansion thread sleeves, and the expansion baffle is slidably connected to the first protective bracket.

5. The protective structure for a lithium battery pack according to claim 4, characterized in that: Clamping bases are symmetrically installed on both sides of the top of the first protective bracket, and a connecting slide groove is opened at the inner center position of the clamping base. The top of the clamping base is symmetrically connected to the clamping rotating rod, and the tops of the two clamping rotating rods are rotatably connected to the clamping sliding sleeves, and the inside of the clamping sliding sleeves is slidably connected to the clamping sliding rod. The outer side of the clamping sliding rod is fixedly installed with a clamping bracket, a clamping spring is fixedly installed on one side of the clamping sliding sleeve, and the top of the clamping sliding sleeve is fixedly installed with a clamping arm.

6. The protective structure for a lithium battery pack according to claim 5, characterized in that: The safety protection mechanism includes a second protection bracket, wherein a closed sliding rod is fixedly installed on the inner periphery of the second protection bracket, a closed sliding sleeve is slidably connected to the outer side of the closed sliding rod, a closed spring is fixedly installed on the bottom of the closed sliding sleeve, the top of the closed sliding sleeve is rotatably connected to the closed rotating rod, the top of the closed rotating rod is rotatably connected to the closed baffle, and a connecting hinge is symmetrically installed on the bottom of the closed baffle, and the connecting hinge is rotatably connected to the second protection bracket.

7. The protective structure for a lithium battery pack according to claim 6, characterized in that: A limiting base is fixedly installed on the bottom of the second protective bracket, and both sides of the top of the limiting base are symmetrically connected to the limiting rotation rod, the top of the limiting rotation rod is rotatably connected to the limiting sliding sleeve, the inner part of the limiting sliding sleeve is slidably connected to the limiting sliding rod, a limiting spring is fixedly installed on one side of the limiting sliding sleeve, a limiting bracket is fixedly installed on the top of the limiting sliding sleeve, and a limiting splint is fixedly installed on the outer side of the limiting sliding rod.

8. The protective structure for a lithium battery pack according to claim 7, characterized in that: Connecting sliding rods are symmetrically installed on both sides of the bottom of the limiting clamping plate, and a supporting spring is fixedly installed on the outer side of the limiting base close to the connecting sliding rod. The bottom of the support spring is fixedly installed with a connecting bottom plate, and connecting racks are fixedly installed around the top of the connecting bottom plate. One side of the connecting rack is meshed with a rotating gear, and a rotating baffle is fixedly installed between the two rotating gears.

9. The protective structure for a lithium battery pack according to claim 8, characterized in that: The second protective bracket is fixedly installed with sealing baffles near the top and bottom of the rotating baffle, and connecting blocks are fixedly installed on both sides of the connecting base. Connecting columns are symmetrically installed on the top of the connecting blocks. The connecting columns are slidably connected to the clamping base through connecting slides. The connecting columns are fixedly installed on the bottom of the clamping bracket, and the protective airbag is placed on the top of the limiting splint. Airbag plugs are snap-connected on both sides of the protective airbag.

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