A buffer mechanism for battery and corresponding lithium battery

Abstract

This divisional application provides a buffer mechanism for a battery and a corresponding lithium battery. The battery pack body, temperature regulating mechanism and buffer mechanism of the lithium battery are arranged in the isolation space between the inner wall of the protection box and the battery pack body. The temperature regulating mechanism includes a temperature sensor, a fan, an isolation plate, a thermal insulation component and a drive component, and the thermal insulation component includes a thermal insulation plate. When the temperature of the external environment of the high-efficiency temperature-controlled lithium battery of the present invention is high, the fan drives the external gas to be discharged into the protection box from the air inlet, accelerates the air flow in the protection box, and enhances heat dissipation. When the temperature of the external environment reaches the first low temperature, the isolation plate can block the air inlet and outlet, isolate the flow of air inside and outside, form a certain degree of insulation, and reduce the impact of the external low temperature on the operation of the battery pack body. When the temperature of the external environment reaches the second low temperature, the thermal insulation plate is driven to be flat against the side of the battery pack body, which can further insulate the battery pack body.

Description

[0001] This application is a divisional application. The application number of the original application is: "202110802570.2", the application date is: "July 15, 2021", and the name of the invention is: "A high-efficiency temperature-controlled lithium battery". Technical Field

[0002] The present invention relates to the field of lithium batteries, and in particular to a buffer mechanism for batteries and a corresponding lithium battery. Background Art

[0003] At present, lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. Lithium batteries have the characteristics of high specific energy, long service life, low pollution, and high operating voltage. Among all environmental factors, temperature has the greatest impact on lithium batteries. If the temperature is too high, exceeding 45°, it will destroy the chemical balance in the battery and cause side reactions. If lithium batteries are used in low temperature environments for a short time, or if the temperature is not low enough, it will only temporarily affect the battery capacity of the lithium battery, but will not cause permanent damage. However, if used in a low temperature environment for a long time, or in an ultra-low temperature environment of -40℃, lithium-ion batteries may be "frozen" and cause permanent damage. In addition, charging lithium-ion batteries in low temperature conditions will also cause permanent damage to the battery.

[0004] Among them, lithium batteries may be used in high temperature environments or low temperature environments, but lithium batteries in the prior art lack a temperature adjustment mechanism, and cannot adjust the heat dissipation or heat preservation of lithium batteries according to the temperature of the external environment. The establishment of a temperature adjustment mechanism requires a stable isolation space.

[0005] Therefore, it is necessary to provide a buffer mechanism for a battery and a corresponding lithium battery to solve the above technical problems. Summary of the invention

[0006] The present invention provides a buffer mechanism for a battery and a corresponding lithium battery, so as to solve the problem that the lithium battery in the prior art cannot adjust the heat dissipation or heat preservation of the lithium battery according to the external environment temperature.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a buffer mechanism for a battery, which is arranged between the inner wall of a protection box and a battery pack body, so that there is an isolation space between the inner wall of the protection box and the battery pack body, and the protection box includes a box body and a cover plate;

[0008] The buffer mechanism includes a bottom elastic member and a top elastic member. The four bottom elastic members are detachably arranged at the four corners of the bottom of the box body, and the four top elastic members are arranged at the four corners of the top of the box body. When the cover plate is connected to the box body, the cover plate squeezes the top elastic members. The battery pack body is a square structure. Each of the bottom elastic members contacts three adjacent side surfaces of the bottom of the battery pack body, and each of the top elastic members contacts three adjacent side surfaces of the top of the battery pack body.

[0009] In the present invention, the top elastic member and the bottom elastic member each include a vertical outer base plate, a transverse outer base plate, a vertical inner base plate, a transverse inner base plate, an arc-shaped connecting plate, a vertical elastic plate and a transverse elastic plate;

[0010] The vertical outer substrate and the vertical inner substrate are arranged in parallel, the first end of the vertical outer substrate and the first end of the vertical inner substrate are connected through the arc connecting plate, the second end of the vertical outer substrate is connected to the horizontal outer substrate, the second end of the vertical inner substrate is connected to the horizontal inner substrate, the horizontal outer substrate and the horizontal inner substrate are arranged in parallel, the vertical outer substrate and the horizontal outer substrate are in contact with the box body, the vertical inner substrate and the horizontal inner substrate are in contact with the battery pack body, the vertical elastic plate is connected between the vertical outer substrate and the vertical inner substrate, and the horizontal elastic plate is connected between the horizontal outer substrate and the horizontal inner substrate.

[0011] Among them, the vertical outer substrate includes a first vertical outer substrate and a second vertical outer substrate connected in an L shape, so as to contact two vertical side surfaces adjacent to the inner side of the box body; the vertical inner substrate includes a first vertical inner substrate and a second vertical inner substrate connected in an L shape, so as to contact two vertical side surfaces adjacent to the outer side of the battery pack body; one end of the first vertical outer substrate away from the second vertical outer substrate and one end of the second vertical outer substrate away from the first vertical outer substrate are both integrally connected with a vertical elastic plate.

[0012] Furthermore, the transverse external substrate includes a first transverse external substrate and a second transverse external substrate connected in an L shape, the first transverse external substrate is connected to the first vertical external substrate, the second transverse external substrate is connected to the second vertical external substrate, and the end of the first transverse external substrate away from the first vertical external substrate and the end of the second transverse external substrate away from the second vertical external substrate are both integrally connected with a transverse elastic plate.

[0013] Further, a clamping block is provided at one end of the first vertical external substrate away from the second vertical external substrate, and at one end of the second vertical external substrate away from the first vertical external substrate, a first through groove is provided between the first vertical external substrate and the second vertical external substrate, and a second through groove is provided between the first horizontal external substrate and the second horizontal external substrate;

[0014] A card slot is arranged on two adjacent vertical side surfaces on the inner side of the box body, and a protrusion corresponding to the card slot is arranged on the box body. The protrusion is used to facilitate the setting of the card slot. The notch of the card slot on each vertical side surface faces another adjacent vertical side surface, and the direction of the notch of the card slot corresponds to the card block on the bottom elastic member.

[0015] Furthermore, a guiding slope is provided at one end of the clamping block away from the arc-shaped connecting plate, so as to facilitate the clamping block to be squeezed with the protrusion and then inserted into the clamping groove, and a pressing plate is provided at the outer end of the vertical elastic plate.

[0016] In addition, the vertical elastic plate and the transverse elastic plate are both arc-shaped plate structures, one end of the vertical elastic plate is connected to the vertical outer substrate, and the other end is bent toward the direction close to the vertical inner substrate, and one end of the transverse elastic plate is connected to the transverse outer substrate, and the other end is bent toward the direction close to the transverse inner substrate.

[0017] In the present invention, reinforcement parts are provided on the inner sides of the vertical elastic plate and the transverse elastic plate, and connecting grooves are provided on the two opposite inner walls of the vertical elastic plate and the transverse elastic plate, and the extension direction of the connecting grooves is parallel to the vertical outer base plate and the transverse outer base plate, and the two ends of the reinforcement parts are detachably connected to the vertical elastic plate or the transverse elastic plate through the two opposite connecting grooves.

[0018] Furthermore, the cross section of the reinforcement portion along its length direction is a wave-like structure, and the length of the reinforcement portion is greater than the distance between the two connecting grooves in the vertical elastic plate and the transverse elastic plate.

[0019] The present invention also includes a lithium battery, which uses the buffer mechanism for the battery, and the lithium battery also includes a temperature regulating mechanism and a protection control board;

[0020] The temperature regulating mechanism is arranged in the isolation space, and the protection control board is electrically connected to the battery pack body;

[0021] The temperature regulating mechanism includes a temperature sensor, a fan, an isolation plate, and a driving assembly. An air inlet and an air outlet are provided on the inner wall of the protection box. The temperature sensor, the fan, and the driving assembly are all electrically connected to the protection control board. The temperature sensor is located outside the protection box. The fan is used to drive external air to be discharged into the protection box from the air inlet. The isolation plate is movably connected to the inner wall of the protection box to cover the air inlet and the air outlet.

[0022] The isolation plate includes an air inlet isolation plate and an air outlet isolation plate, the air inlet hole and the air outlet hole are respectively located on opposite sides of the protection box, the air inlet isolation plate is used to block the air inlet hole, and the air outlet isolation plate is used to block the air outlet hole, the air inlet isolation plate and the air outlet isolation plate are connected by a telescopic lever member, the middle part of the telescopic lever member is rotatably connected to the inner wall of the protection box, the fan is arranged at the air inlet hole, and the driving assembly is connected to the air outlet isolation plate to drive the air inlet isolation plate and the air outlet isolation plate to slide.

[0023] Compared with the prior art, the present invention has the following beneficial effects: when the temperature of the external environment of the lithium battery of the present invention is high, the fan is used to drive the external gas to be discharged from the air inlet into the protective box, thereby accelerating the air flow in the protective box and enhancing heat dissipation. When the temperature of the external environment reaches the first low temperature, the isolation plate can block the air inlet and outlet, isolate the flow of air inside and outside, form a certain degree of insulation, and reduce the impact of the external low temperature on the operation of the battery pack body. When the temperature of the external environment reaches the second low temperature, the insulation plate is driven to be flat against the side of the battery pack body, which can further insulate the battery pack body and can be transformed into different heat dissipation or insulation modes according to the temperature of the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0025] Figure 1 It is a schematic structural diagram of the temperature regulating mechanism of the lithium battery of the present invention.

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the lithium battery of the present invention.

[0027] Figure 3 The figure is a schematic diagram of an implementation structure of the first lateral insulation plate of the lithium battery of the present invention.

[0028] Figure 4 for Figure 3 A schematic diagram of the structure in which the first split insulation board and the second split insulation board are connected.

[0029] Figure 5 It is a schematic structural diagram of the bottom elastic member of the lithium battery of the present invention.

[0030] Figure 6 for Figure 5 A partial enlarged view of the X in the middle.

[0031] Figure 7 It is a schematic structural diagram of the bottom elastic member of the lithium battery of the present invention from another viewing angle.

[0032] Figure 8 It is a schematic structural diagram of the elastic telescopic rod of the lithium battery of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] Lithium batteries may be used in high-temperature environments or low-temperature environments, but lithium batteries in the prior art lack a temperature regulation mechanism and cannot adjust the heat dissipation or heat preservation of the lithium batteries according to the temperature of the external environment.

[0035] At the same time, some lithium batteries are packaged in boxes for protection, and in the prior art, sponge blocks are set between the battery pack body and the inner wall of the box to form a buffer protection for the battery pack body and prevent the battery pack body from loosening. However, the sponge blocks will waste the box space and it is inconvenient to set some additional mechanisms for lithium batteries, such as setting a temperature adjustment mechanism for heat dissipation or heat preservation of the battery pack body.

[0036] The following is a preferred embodiment of a lithium battery provided by the present invention that can solve the above technical problems.

[0037] Please refer to Figure 1 and Figure 2 ,in Figure 1 is a schematic structural diagram of the temperature regulating mechanism of the lithium battery of the present invention, Figure 2 It is a schematic diagram of the cross-sectional structure of the lithium battery of the present invention.

[0038] In the figures, structurally similar elements are denoted by the same reference numerals.

[0039] A preferred embodiment of a lithium battery provided by the present invention is: a high-efficiency temperature-controlled lithium battery, which includes a battery pack body 12, a protection box, a protection control board (the protection control board lithium is used for charging and discharging protection of the battery pack, and a chip can be set on the protection control board, which can control the operation of components such as the fan and drive assembly according to the temperature detection data of the temperature rod, not shown in the figure), a temperature regulating mechanism and a buffer mechanism. The battery pack body 12 is arranged in the protection, and the buffer mechanism is arranged between the inner wall of the protection box and the battery pack body 12, so that there is an isolation space between the inner wall of the protection box and the battery pack body 12, the temperature regulating mechanism is arranged in the isolation space, and the protection control board is electrically connected to the battery pack body 12.

[0040] The temperature regulating mechanism includes a temperature sensor 13, a fan 1D, an isolation plate, an insulation component and a drive component 1B. An air inlet 113 and an air outlet 114 are arranged on the inner wall of the protection box. The temperature sensor 13, the fan 1D and the drive component 1B are electrically connected to the protection control board. The temperature sensor 13 is located outside the protection box (of course, a temperature sensor can be further arranged inside the protection box so that the protection control board can perform various controls according to the temperature of the battery pack body 12 and the temperature of the external environment).

[0041] The fan 1D is used to drive external air to be discharged into the protection box from the air inlet 113. When the temperature of the external environment is high, the air flow in the protection box is accelerated to enhance heat dissipation.

[0042] The isolation plate is movably connected to the inner wall of the protection box to block the air inlet 113 and the air outlet 114. When the temperature of the external environment reaches the first low temperature, it isolates the flow of internal and external air to form a certain degree of insulation, thereby reducing the impact of the external low temperature on the operation of the battery pack body 12.

[0043] The insulation component is movably arranged in the isolation space, and the driving component 1B drives the isolation plate and the insulation component to move. The insulation component includes an insulation plate (the insulation plate is a hard plate, and can also be formed by a mixture of hard material and flexible insulation material). The insulation component includes an expanded position and a retracted position on the activity track. When the insulation component is in the retracted position, the insulation plate is flat against the side of the battery pack body 12. When the temperature of the external environment reaches the second low temperature (the temperature of the second low temperature is lower than the temperature of the first low temperature), the battery pack body 12 can be further insulated. When the insulation component is in the expanded position, the insulation plate of the insulation component is at a set distance from the side of the battery pack body 12. When the temperature of the external environment is high, the expanded state is conducive to air flow and heat dissipation.

[0044] In the present invention, the protection box includes a box body 111 and a cover plate 112, and the buffer mechanism includes a bottom elastic member 21 and a top elastic member. The bottom elastic member 21 and the top elastic member have substantially the same structure, so the bottom elastic member 21 is described in the following main figures.

[0045] The four bottom elastic members 21 are detachably arranged at the four corners of the bottom of the box body 111, a first positioning groove 1111 for positioning the bottom elastic member 21 is arranged on the inner bottom surface of the box body 111, and a second positioning groove 1113 for positioning the top elastic member is arranged on the inner top surface of the cover plate 112. The four top elastic members are arranged at the four corners of the top of the box body 111. The buffer mechanism can not only support the isolation space between the protection box and the battery pack body 12, but also form a buffer protection for the battery pack body 12. At the same time, the buffer mechanism is arranged at each corner of the battery pack body 12, so that there is a larger isolation space between the protection box and the battery pack body 12, so as to facilitate the setting of various additional mechanisms, such as the temperature adjustment mechanism in this embodiment.

[0046] When the cover plate 112 is connected to the box body 111, the cover plate 112 squeezes the top elastic member, the battery pack body 12 is a square structure, each bottom elastic member 21 contacts the three adjacent side surfaces at the bottom of the battery pack body 12, and each top elastic member contacts the three adjacent side surfaces at the top of the battery pack body 12, and the structure is stable.

[0047] In addition, it can be understood that the four corners of each insulation board are provided with avoidance grooves for avoiding the buffer mechanism.

[0048] Please refer to Figure 5 In this embodiment, the top elastic member and the bottom elastic member 21 both include a vertical outer substrate 211, a transverse outer substrate 212, a vertical inner substrate 213, a transverse inner substrate 214, an arc-shaped connecting plate 217, a vertical elastic plate 215 and a transverse elastic plate 216.

[0049] The vertical outer substrate 211 and the vertical inner substrate 213 are arranged in parallel, the first end of the vertical outer substrate 211 and the first end of the vertical inner substrate 213 are connected by an arc-shaped connecting plate 217, the second end of the vertical outer substrate 211 is connected to the horizontal outer substrate 212, the second end of the vertical inner substrate 213 is connected to the horizontal inner substrate 214, the horizontal outer substrate 212 and the horizontal inner substrate 214 are arranged in parallel, the vertical outer substrate 211 and the horizontal outer substrate 212 are in contact with the box body 111, the vertical inner substrate 213 and the horizontal inner substrate 214 are in contact with the battery pack body 12, and the vertical inner substrate 21 3 and the horizontal inner substrate 214 are provided with a flexible layer (the flexible layer is not shown in the figure) for flexible contact with the battery pack body 12. The flexible layer can be made of soft rubber material. The vertical elastic plate 215 is connected between the vertical outer substrate 211 and the vertical inner substrate 213, so that an elastic space is formed between the vertical outer substrate 211 and the vertical inner substrate 213. The horizontal elastic plate 216 is connected between the horizontal outer substrate 212 and the horizontal inner substrate 214, and can play an elastic buffering role between the battery pack body 12 and the inner wall of the box body 111, thereby protecting the battery pack body.

[0050] In this embodiment, please refer to Figure 7 The vertical outer substrate 211 includes a first vertical outer substrate and a second vertical outer substrate connected in an L shape, so as to contact two vertical side surfaces adjacent to the inner side of the box body 111. The vertical inner substrate 213 includes a first vertical inner substrate and a second vertical inner substrate connected in an L shape, so as to contact two vertical side surfaces adjacent to the outer side of the battery pack body 12. One end of the first vertical outer substrate 211 away from the second vertical outer substrate 211 and one end of the second vertical outer substrate 211 away from the first vertical outer substrate 211 are both integrally connected with a vertical elastic plate 215, which can form a better and more uniform elastic support and is convenient to manufacture.

[0051] Please refer to Figure 5 and Figure 7 The transverse outer substrate 212 includes a first transverse outer substrate and a second transverse outer substrate connected in an L shape, which can be easily elastically contracted to facilitate the card block 218 to be connected with the corresponding card slot. The first transverse outer substrate is connected to the first vertical outer substrate, and the second transverse outer substrate is connected to the second vertical outer substrate. The end of the first transverse outer substrate away from the first vertical outer substrate and the end of the second transverse outer substrate away from the second vertical outer substrate are both integrally connected with a transverse elastic plate 216 to form a better and more uniform elastic support. The transverse inner substrate 214 is a square plate structure, which can form a more stable contact with the battery pack body and can shield the transverse elastic plate 216 to prevent it from cutting the user.

[0052] Further, a card slot is provided on two adjacent vertical side surfaces inside the box body 111, and a corresponding protrusion 1112 is provided on the box body 111. The protrusion 1112 can facilitate the setting of the card slot. The notch of the card slot on each vertical side surface faces the other adjacent vertical side surface, and the direction of the notch of the card slot corresponds to the card block 218 on the bottom elastic member 21. Please refer to Figure 5 A clamping block 218 is provided at one end of the first vertical external substrate away from the second vertical external substrate, and at one end of the second vertical external substrate away from the first vertical external substrate. A first through groove 2111 is provided between the first vertical external substrate and the second vertical external substrate, and a second through groove 2161 is provided between the first horizontal external substrate and the second horizontal external substrate. The first through groove 2111 and the second through groove 2161 are connected to facilitate the contraction of the vertical external substrate 211 and the horizontal external substrate 212, and to facilitate the clamping connection between the clamping block 218 and the clamping groove.

[0053] In addition, a guide slope is provided at one end of the block 218 away from the arc-shaped connecting plate 217. Figure 5 A guiding slope is provided at the bottom end of the middle block 218 to facilitate the block 218 to be squeezed with the protrusion 1112 and then inserted into the slot. A pressing plate 2151 is provided at the outer end of the vertical elastic plate 215 to facilitate the disassembly between the block 218 and the slot by pressing the pressing plate 2151.

[0054] In the present invention, the vertical elastic plate 215 and the transverse elastic plate 216 are both arc-shaped plate structures. One end of the vertical elastic plate 215 is connected to the vertical outer substrate 211, and the other end is bent toward the direction close to the vertical inner substrate 213. One end of the transverse elastic plate 216 is connected to the transverse outer substrate 212, and the other end is bent toward the direction close to the transverse inner substrate 214.

[0055] Please refer to Figure 5 and Figure 6 ( Figure 6 The reinforcing portion 219 in the vertical elastic plate 215 has not been completely inserted into the inner side of the vertical elastic plate 215), the inner sides of the vertical elastic plate 215 and the transverse elastic plate 216 are both provided with reinforcing portions 219, and not all reinforcing portions are shown in the figure, and only the reinforcing portion 219 in the vertical elastic plate 215 at one end is illustrated), and the two opposite inner side walls of the vertical elastic plate 215 and the transverse elastic plate 216 are both provided with connecting grooves (the connecting grooves can be referred to Figure 5 The connecting groove 2162 on the middle transverse elastic plate 216 extends in a direction parallel to the vertical outer base plate 211 and the transverse outer base plate 212. The two ends of the reinforcing portion 219 are detachably connected to the vertical elastic plate 215 or the transverse elastic plate 216 through two opposite connecting grooves 2162. The reinforcing portion 219 can play a strong elastic supporting role and is easy to replace after being damaged.

[0056] like Figure 6 The cross-section of the reinforcing portion 219 along its length direction in this embodiment is a wavy structure. The length of the reinforcing portion 219 is greater than the distance between the two connecting grooves 2162 in the vertical elastic plate 215 and the transverse elastic plate 216. The elastic force of the vertical elastic plate 215 and the transverse elastic plate 216 can make the reinforcing portion 219 stably placed on the inner side thereof.

[0057] Please refer to Figure 1 and Figure 2 In the present invention, the isolation plate includes an air inlet isolation plate 1A and an air outlet isolation plate 19, the air inlet hole 113 and the air outlet hole 114 are respectively located on opposite sides of the protection box, the air inlet isolation plate 1A is used to block the air inlet hole 113, and the air outlet isolation plate 19 is used to block the air outlet hole 114, wherein the air inlet isolation plate 1A and the air outlet isolation plate 19 can be provided with sliders at both ends, such as Figure 1 The sliders 1A1 at both ends of the middle air inlet isolation plate 1A and the inner wall of the box body 111 can be provided with sliding grooves adapted to the sliders 1A1 to facilitate the air inlet isolation plate 1A and the air outlet isolation plate 19 to slide along the inner wall of the box body 111.

[0058] The air inlet isolation plate 1A and the air outlet isolation plate 19 are connected by a telescopic lever member 18, and the air inlet isolation plate 1A and the air outlet isolation plate 19 are lifted and slid vertically. The telescopic lever member 18 rotates and adapts to the connection distance between the air inlet isolation plate 1A and the air outlet isolation plate 19 by telescoping. The middle part of the telescopic lever member 18 is rotatably connected to the inner wall of the protection box. The fan 1D is arranged at the air inlet hole 113, and the drive component 1B is connected to the air outlet isolation plate 19 to drive the air inlet isolation plate 1A and the air outlet isolation plate 19 to slide. The drive component 1B can select a linear drive mechanism such as a motor screw mechanism or an electric push rod mechanism in the prior art, which will not be repeated here.

[0059] The insulation assembly in this embodiment includes a first lateral insulation plate 14, a first elastic telescopic rod and a first inclined block 143. One end of the first elastic telescopic rod is fixedly connected to the inner wall of the protection box, and the other end is connected to the first lateral insulation plate 14. A first inclined block 143 is provided on the side of the first lateral insulation plate 14 away from the battery pack body 12. The first inclined block 143 is located on the sliding path of the air inlet isolation plate 1A and the air outlet isolation plate 19, so that the first lateral insulation plate 14 overcomes the elastic contraction force of the first elastic telescopic rod and slides in the direction close to the battery pack body 12, thereby enabling the first lateral insulation plate 14 to be driven and controlled to be flat with the battery pack body 12 for insulation.

[0060] In addition, the insulation component also includes a second lateral insulation plate 15, a second elastic telescopic rod and a second inclined block 151. The second lateral insulation plate 15 is arranged on both sides of the battery pack body 12 close to the telescopic lever member 18. One end of the second elastic telescopic rod is fixedly connected to the inner wall of the protection box, and the other end is connected to the second lateral insulation plate 15. The second lateral insulation plate 15 is arranged on the side away from the battery pack body 12 with a second inclined block 151. The second inclined block 151 is located on the sliding path of the telescopic lever member 18, so that the second lateral insulation plate 15 overcomes the elastic force of the second elastic telescopic rod and slides in the direction close to the battery pack body 12, thereby enabling the second lateral insulation plate 15 to be driven and controlled to be flat with the battery pack body 12 for insulation.

[0061] Please refer to Figure 1 , Figure 3 and Figure 4Preferably, the battery pack body 12 is provided with a first lateral insulation plate 14 on both sides close to the air inlet 113 and the air outlet 114, the first lateral insulation plate 14 includes a first split insulation plate 141 and a second split insulation plate 142, the first elastic telescopic rod includes a first middle elastic telescopic rod 1E and a first side elastic telescopic rod 1F, the two second split insulation plates 142 are located on both sides of the first split insulation plate 141, and the second split insulation plates 142 and the first split insulation plates 141 contacts a side away from the battery pack body 12, the first split insulation plate 141 is connected to the inner wall of the protection box through the first middle elastic telescopic rod 1E, and the second split insulation plate 142 is connected to the inner wall of the protection box through the first side elastic telescopic rod 1F. The sliding of the first split insulation plate 141 and the second split insulation plate 142 are independent of each other, but the second split insulation plate 142 can squeeze the first split insulation plate 141, driving the first split insulation plate 141 to slide.

[0062] It should be noted that the structures of the first elastic telescopic rod, the second elastic telescopic rod, the third elastic telescopic rod, the first middle elastic telescopic rod 1E and the first side elastic telescopic rod 1F in this embodiment are similar, and the connection structures formed by all insulation boards and the corresponding elastic telescopic rods are similar, which will not be described one by one. The size specifications of the elastic telescopic rods in different positions may be different.

[0063] The elastic telescopic structure of all elastic telescopic rods can refer to Figure 8 , which include a fixed section 31 and a telescopic section 32. The telescopic section 32 is slidably connected in the fixed section 31, and an elastic member 33 is provided in the fixed section 31. The elastic member connects the fixed section 31 and the telescopic section 32, so that the elastic telescopic rod can be contracted, so that the insulation board can return to a position away from the battery pack body 12.

[0064] The first middle elastic telescopic rod 1E and the first side elastic telescopic rod 1F both include a fixed section and a telescopic section. The fixed section is used to limit the sliding position of the first split insulation board 141 and the second split insulation board 142. The length of the fixed section of the first middle elastic telescopic rod 1E is greater than the length of the fixed section of the first side elastic telescopic rod 1F. The telescopic length of the telescopic section of the first side elastic telescopic rod 1F is greater than the telescopic length of the telescopic section of the first middle elastic telescopic rod 1E. The first inclined block 143 is connected to the second split insulation board 142.

[0065] When the air inlet isolation plate 1A or the air outlet isolation plate 19 is away from the first inclined block 143, the first split insulation plate 141 and the second split insulation plate 142 are respectively pulled away from the battery pack body 12 by their respective first elastic telescopic rods, and due to the difference in the position of the fixed section of the first middle elastic telescopic rod 1E and the fixed section of the first side elastic telescopic rod 1F, that is, the fixed section of the first middle elastic telescopic rod 1E is longer, so that the first split insulation plate 141 and the second split insulation plate 142 form a Figure 3 The staggered layered structure shown has a position corresponding to the position of the air inlet 113 and the air outlet 114, which is very beneficial for ventilation and improves the air flow efficiency between the internal space and the external space.

[0066] When the air inlet isolation plate 1A or the air outlet isolation plate 19 squeezes the first inclined block 143 , the second split insulation plate 142 can squeeze the first split insulation plate 141 while sliding, driving the first split insulation plate 141 to slide toward the battery pack body 12 .

[0067] Furthermore, the insulation assembly in this embodiment also includes a top insulation plate 16, a bottom insulation plate 17, a third elastic telescopic rod and a rotating rod 1C. The top insulation plate 16 and the bottom insulation plate 17 are connected to the inner wall of the protection box through the third elastic telescopic rod. The first ends of the top insulation plate 16 and the bottom insulation plate 17 are provided with a rotating rod 1C, and the rotating rod 1C is rotatably connected to the inner wall of the protection box. The top insulation plate 16 and the bottom insulation plate 17 are respectively movably connected to the first ends of the corresponding rotating rods 1C. The bottom end of the air inlet isolation plate 1A and the top end of the air outlet isolation plate 19 are provided with push rods 191. The push rod 191 is opposite to the second end of the rotating rod 1C for pushing the rotating rod 1C to rotate. The push rod 191 is provided with a groove corresponding to the rotating rod 1C, so that the top insulation plate 16 or the bottom insulation plate 17 slides in the direction close to the battery pack body 12, so that the top insulation plate 16 and the bottom insulation plate 17 can be driven and controlled to be flat with the battery pack body 12 for insulation.

[0068] Preferably, the insulation assembly also includes a connecting plate 171, and the second ends of the top insulation plate 16 and the bottom insulation plate 17 are both provided with a connecting plate 171, and the top end of the air inlet isolation plate 1A and the bottom end of the air outlet isolation plate 19 are both provided with a pull rope 192 (such as a steel wire rope). Compared with hard structures such as pull rods, the pull rope can save more space, and the pull rope 192 is connected to the connecting plate 171.

[0069] Among them, the pull rope 192 has a preset length, so that when the temperature of the external environment reaches the first low temperature, the air inlet isolation plate 1A slides to block the air inlet hole 113, or the air outlet isolation plate 19 slides to block the air outlet hole 114. During this process, the air inlet isolation plate 1A and the air outlet isolation plate 19 consume the reserved length of the pull rope 192, but it is not straightened. When the temperature of the external environment reaches the second low temperature, the air inlet isolation plate 1A and the air outlet isolation plate 19, and the air inlet isolation plate 1A keeps blocking the air inlet hole 113, and the air outlet isolation plate 19 keeps blocking the air outlet hole 114, the pull rope 192 gradually straightens, and gradually drives the top insulation plate 16 or the bottom insulation plate 17 to slide toward the direction close to the battery pack body 12, and cooperates with the driving of the top insulation plate 16 or the bottom insulation plate 17 by the rotating rod 1C, making the driving more stable.

[0070] In this embodiment, the first lateral insulation board 14, the second lateral insulation board 15, the top insulation board 16 and the bottom insulation board 17 can be driven to slide by a driving assembly, with high control efficiency and low cost.

[0071] The air inlet isolation plate 1A includes a first initial position, a first blocking position and a first driving position on the sliding track;

[0072] The air outlet isolation plate 19 includes a second initial position, a second blocking position and a second driving position on the sliding track.

[0073] When the temperature of the external environment is high, the air outlet isolation plate 19 is controlled to be located at the second initial position. At this time, the air inlet isolation plate 1A is located at the first initial position. The air inlet isolation plate 1A is offset from the air inlet hole 113, and the air outlet isolation plate 19 is offset from the air outlet hole 114, which is conducive to ventilation.

[0074] When the temperature of the external environment reaches the first low temperature, the air outlet isolation plate 19 is controlled to be in the second blocking position. At this time, the air inlet isolation plate 1A is in the first blocking position. The air inlet isolation plate 1A blocks the air inlet hole 113, and the air outlet isolation plate 19 blocks the air outlet hole 114.

[0075] When the temperature of the external environment reaches the second low temperature, the air outlet isolation plate 19 is controlled to be in the second driving position. At this time, the air inlet isolation plate 1A is in the first driving position, the air inlet isolation plate 1A blocks the air inlet hole 113, and the air outlet isolation plate 19 blocks the air outlet hole 114, and the air inlet isolation plate 1A or the air outlet isolation plate 29 squeezes the first inclined block 143, so that the first lateral insulation plate 14 is flat against the side of the battery pack body 12, and the telescopic lever member 18 squeezes the second inclined block 151, so that the second lateral insulation plate 15 is flat against the side of the battery pack body 12, the push rod 191 pushes the rotating rod 1C to rotate, and the pull rope 192 pulls the connecting plate 171 to slide, so that the top insulation plate 16 is flat against the top surface of the battery pack body 12, and the bottom insulation plate 17 is flat against the bottom surface of the battery pack body 12.

[0076] In this way, the efficient temperature-controlled lithium battery of the preferred embodiment can autonomously dissipate heat or keep warm under different temperature conditions.

[0077] The efficient temperature-controlled lithium battery of this preferred embodiment can not only support the isolation space between the protective box and the battery pack body by setting a buffer mechanism, forming a stable buffer protection for the battery pack body, but also the buffer mechanism is set at each corner of the battery pack body, so that there is a larger isolation space between the protective box and the battery pack body, which is convenient for setting various additional mechanisms.

[0078] In addition, when the temperature of the external environment of the high-efficiency temperature-controlled lithium battery of the present invention is high, the fan is used to drive the external gas to be discharged from the air inlet into the protective box, thereby accelerating the air flow in the protective box and enhancing heat dissipation. When the temperature of the external environment reaches the first low temperature, the isolation plate can block the air inlet and outlet, isolating the flow of air inside and outside, forming a certain degree of insulation, and reducing the impact of the external low temperature on the operation of the battery pack body. When the temperature of the external environment reaches the second low temperature, the insulation plate is driven to be flat against the side of the battery pack body, which can further insulate the battery pack body and can be transformed into different heat dissipation or insulation modes according to the temperature of the external environment.

[0079] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A buffer mechanism for a battery, characterized in that: The buffer mechanism is arranged between the inner wall of the protection box and the battery pack body, so that there is an isolation space between the inner wall of the protection box and the battery pack body, and the protection box includes a box body and a cover plate; The buffer mechanism comprises a bottom elastic member and a top elastic member, wherein four bottom elastic members are detachably arranged at the four corners of the bottom of the box body, and four top elastic members are arranged at the four corners of the top of the box body. When the cover plate is connected to the box body, the cover plate presses the top elastic members, and the battery pack body is a square structure, each of the bottom elastic members contacts three adjacent side surfaces of the bottom of the battery pack body, and each of the top elastic members contacts three adjacent side surfaces of the top of the battery pack body; The top elastic member and the bottom elastic member each include a vertical outer base plate, a transverse outer base plate, a vertical inner base plate, a transverse inner base plate, an arc-shaped connecting plate, a vertical elastic plate and a transverse elastic plate; The vertical outer substrate and the vertical inner substrate are arranged in parallel, the first end of the vertical outer substrate and the first end of the vertical inner substrate are connected through the arc-shaped connecting plate, the second end of the vertical outer substrate is connected to the horizontal outer substrate, the second end of the vertical inner substrate is connected to the horizontal inner substrate, the horizontal outer substrate and the horizontal inner substrate are arranged in parallel, the vertical outer substrate and the horizontal outer substrate are in contact with the box body, the vertical inner substrate and the horizontal inner substrate are in contact with the battery pack body, the vertical elastic plate is connected between the vertical outer substrate and the vertical inner substrate, and the horizontal elastic plate is connected between the horizontal outer substrate and the horizontal inner substrate; The vertical outer substrate includes a first vertical outer substrate and a second vertical outer substrate connected in an L shape, so as to contact two vertical side surfaces adjacent to the inner side of the box body; the vertical inner substrate includes a first vertical inner substrate and a second vertical inner substrate connected in an L shape, so as to contact two vertical side surfaces adjacent to the outer side of the battery pack body; one end of the first vertical outer substrate away from the second vertical outer substrate and one end of the second vertical outer substrate away from the first vertical outer substrate are both integrally connected with one of the vertical elastic plates; The transverse external substrate includes a first transverse external substrate and a second transverse external substrate connected in an L shape, the first transverse external substrate is connected to the first vertical external substrate, the second transverse external substrate is connected to the second vertical external substrate, and an end of the first transverse external substrate away from the first vertical external substrate and an end of the second transverse external substrate away from the second vertical external substrate are both integrally connected with a transverse elastic plate.

2. The buffer mechanism for a battery according to claim 1, characterized in that: A clamping block is provided at one end of the first vertical external substrate away from the second vertical external substrate, and at one end of the second vertical external substrate away from the first vertical external substrate; a first through groove is provided between the first vertical external substrate and the second vertical external substrate, and a second through groove is provided between the first horizontal external substrate and the second horizontal external substrate; A card slot is arranged on two adjacent vertical side surfaces on the inner side of the box body, and a protrusion corresponding to the card slot is arranged on the box body. The protrusion is used to facilitate the setting of the card slot. The notch of the card slot on each vertical side surface faces another adjacent vertical side surface, and the direction of the notch of the card slot corresponds to the card block on the bottom elastic member.

3. The buffer mechanism for a battery according to claim 2, characterized in that: A guiding slope is arranged at one end of the clamping block away from the arc-shaped connecting plate, so as to facilitate the clamping block to be squeezed with the protrusion and then clamped into the clamping groove, and a pressing plate is arranged at the outer end of the vertical elastic plate.

4. The buffer mechanism for a battery according to claim 1, characterized in that: The vertical elastic plate and the transverse elastic plate are both arc-shaped plate structures. One end of the vertical elastic plate is connected to the vertical outer substrate, and the other end is bent toward the vertical inner substrate. One end of the transverse elastic plate is connected to the transverse outer substrate, and the other end is bent toward the transverse inner substrate.

5. The buffer mechanism for a battery according to claim 1, characterized in that: Reinforcement parts are provided on the inner sides of the vertical elastic plate and the transverse elastic plate, and connecting grooves are provided on the two opposite inner walls of the vertical elastic plate and the transverse elastic plate. The extension direction of the connecting grooves is parallel to the vertical outer base plate and the transverse outer base plate, and the two ends of the reinforcement parts are detachably connected to the vertical elastic plate or the transverse elastic plate through the two opposite connecting grooves.

6. The buffer mechanism for a battery according to claim 5, characterized in that: The cross section of the reinforcement portion along its length direction is a wave-like structure, and the length of the reinforcement portion is greater than the distance between the two connecting grooves in the vertical elastic plate and the transverse elastic plate.

7. A lithium battery, characterized in that: Using the buffer mechanism for a battery as described in any one of claims 1 to 6, the lithium battery further includes a temperature regulating mechanism and a protection control board; The temperature regulating mechanism is arranged in the isolation space, and the protection control board is electrically connected to the battery pack body; The temperature regulating mechanism includes a temperature sensor, a fan, an isolation plate, and a driving assembly. An air inlet and an air outlet are provided on the inner wall of the protection box. The temperature sensor, the fan, and the driving assembly are all electrically connected to the protection control board. The temperature sensor is located outside the protection box. The fan is used to drive external air to be discharged into the protection box from the air inlet. The isolation plate is movably connected to the inner wall of the protection box to cover the air inlet and the air outlet. The isolation plate includes an air inlet isolation plate and an air outlet isolation plate, the air inlet hole and the air outlet hole are respectively located on opposite sides of the protection box, the air inlet isolation plate is used to block the air inlet hole, and the air outlet isolation plate is used to block the air outlet hole, the air inlet isolation plate and the air outlet isolation plate are connected by a telescopic lever member, the middle part of the telescopic lever member is rotatably connected to the inner wall of the protection box, the fan is arranged at the air inlet hole, and the driving assembly is connected to the air outlet isolation plate to drive the air inlet isolation plate and the air outlet isolation plate to slide.

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