Lithium battery plastic shell capable of being safely locked when coping with impact

Abstract

The invention belongs to the technical field of lithium batteries, and particularly relates to an impact-coping safe locking type lithium battery plastic shell which comprises a lithium battery box, and the lithium battery box comprises a plurality of unit lithium battery racks; the unit lithium battery rack comprises a lithium battery positioning rack and an outer limiting frame, a supporting plate is arranged on the side edge of the outer limiting frame, and a plurality of staggered telescopic devices I are additionally arranged on the supporting plate; the lithium battery positioning frame comprises a plurality of unit positioning frames, and staggered telescopic devices II are arranged among the plurality of unit positioning frames; after the unit positioning frame is impacted, the dislocation telescopic device I is used for forming dislocation protection with the adjacent unit lithium battery frame, and the dislocation telescopic device II is used for forming dislocation protection with the adjacent unit positioning frame; multi-stage staggered energy absorption is achieved, the lithium batteries in the impact area are transferred, the lithium batteries in the impact area are prevented from impacting the lithium batteries in the non-impact area, and the lithium batteries in the non-impact area are protected; the impact area and the non-impact area are divided, reasonable locking protection is carried out, and the fire extinguishing pipeline can also be protected.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and specifically to a plastic shell of a lithium battery that can be safely locked in response to impact. Background Art

[0002] As the core protection unit of the power battery of electric vehicles, the lithium battery box needs to meet three core requirements: high safety, light weight, and environmental adaptability. At the safety level, the battery box needs to suppress the spread of thermal runaway through explosion-proof design, flame-retardant materials, and multi-layer heat insulation structures; at the same time, it needs to meet the IP67 / IP68 protection level to resist rain, dust, and salt spray erosion. For the electric vehicle scenario, the battery box also needs to have efficient thermal management capabilities, and control the temperature difference of the battery cells within ±2°C through liquid cooling plates, thermal conductive adhesives, or phase change materials to ensure the battery life and performance. Structurally, the mainstream design tends to be highly integrated, such as CTP (Cell to Pack) and CTC (Cell to Chassis) technologies, which directly integrate the battery cells into the battery box or the vehicle body chassis to reduce the number of components.

[0003] Currently, the lithium battery box of electric vehicles is evolving towards the core directions of high safety, high energy efficiency, and high integration, and the innovation of materials and structures continuously pushes the performance boundaries. With the popularization of CTC technology and the commercialization of solid-state batteries, the lithium battery box will gradually upgrade from a "passive protection container" to an "active safety center".

[0004] However, after being impacted, especially in a car accident, the lithium battery box is prone to being impacted. If no corresponding protection and energy absorption mechanism is added, the batteries that are not impacted will also be damaged. At the same time, after the battery is damaged, especially when the fire extinguishing pipeline is also damaged, it will catch fire when encountering an open flame, and the batteries that are not impacted will also be damaged; that is, the prior art does not divide the impact area and the non-impact area for reasonable locking protection. Summary of the Invention

[0005] Aiming at the problem that the prior art does not divide the impact area and the non-impact area for reasonable locking protection. To achieve the above object, the present invention provides the following technical solutions: A plastic shell for a lithium battery that can be safely locked in response to impact, comprising a lithium battery box installed on a vehicle body through an outer retainer. The lithium battery box includes a plurality of lithium battery limit frames, and each lithium battery limit frame is divided into a plurality of unit lithium battery frames. The unit lithium battery frame includes a lithium battery positioning frame and an outer limit frame. The outer limit frame is sleeved outside the lithium battery positioning frame and is used for erecting and installing the lithium battery positioning frame. The outer limit frame is provided with a support plate on its side edge, and the support plate is integrally and fixedly connected to the outer limit frame. A plurality of dislocation telescopic devices I are installed on the support plate. The dislocation telescopic device I is used to form a dislocation protection between it and the adjacent unit lithium battery frame after the unit lithium battery frame is impacted. The lithium battery positioning frame includes a plurality of unit positioning frames, and a dislocation telescopic device II is arranged between the plurality of unit positioning frames. The dislocation telescopic device II is used to form a dislocation protection between it and the adjacent unit positioning frame after the unit positioning frame is impacted. The unit positioning frame is used to complete the installation of the lithium battery into a multi-unit form. Therefore, from a plurality of lithium battery limit frames to a plurality of unit lithium battery frames, and then to a plurality of unit positioning frames on the lithium battery positioning frame, the lithium battery is formed into a multi-level unit. After being impacted, the dislocation telescopic device I is used to form a dislocation protection between the unit lithium battery frame and the adjacent unit lithium battery frame after the unit lithium battery frame is impacted; and the dislocation telescopic device II is used to form a dislocation protection between the unit positioning frame and the adjacent unit positioning frame after the unit positioning frame is impacted, realizing multi-level dislocation energy absorption, transferring the lithium battery in the impact area, avoiding the lithium battery in the impact area from impacting the lithium battery in the non-impact area, and completing the protection of the lithium battery in the non-impact area; that is, dividing the impact area and the non-impact area, performing reasonable locking protection, and also being able to protect the fire extinguishing pipeline to avoid the occurrence of spontaneous combustion events.

[0006] A further solution: The dislocation telescopic device I includes an electric telescopic rod; the dislocation telescopic device II includes a guiding slider, and a first wedge surface is provided on the guiding slider, and a guiding component is provided on the first wedge surface. After being impacted, the electric telescopic rod in the impact area is triggered. After the electric telescopic rod extends, it can drive the adjacent two unit lithium battery frames into a dislocation state, completing the use of the dislocation telescopic device I to form a dislocation protection between the unit lithium battery frame and the adjacent unit lithium battery frame after the unit lithium battery frame is impacted; and after being impacted, the guiding sliders on the adjacent two unit positioning frames in the impact area are triggered. The guiding slider drives the adjacent two unit positioning frames into a dislocation state along the guiding component through the first wedge surface, completing the use of the dislocation telescopic device II to form a dislocation protection between the unit positioning frame and the adjacent unit positioning frame after the unit positioning frame is impacted. The guiding component includes a guiding groove and a guiding convex edge. The guiding groove is provided on the first wedge surface of one unit positioning frame, and the guiding convex edge is provided on the first wedge surface of the adjacent other unit positioning frame; the guiding convex edge is slidably assembled on the guiding groove, and a spring is arranged inside the guiding groove. The spring is used for energy absorption when the guiding convex edge slides inside the guiding groove.

[0007] Further solution: The unit positioning frame includes a positioning frame body, and a cavity is provided inside the positioning frame body; a plurality of positioning holes are provided on the positioning frame body, and the plurality of positioning holes are distributed in multiple rows and columns on the positioning frame body.

[0008] Even further solution: A plurality of positioning prism structures are provided on the positioning frame body, and the plurality of positioning prism structures are arrayed between the plurality of positioning holes.

[0009] Even further solution: The positioning prism structure includes a positioning prism and two positioning heads distributed at both ends of the positioning prism; the positioning head includes a positioning block, and an arc-shaped groove is respectively provided around the positioning block, and the radian of the arc-shaped groove is used to match a single-section lithium battery; a material guiding port is provided on the positioning block above and below the arc-shaped groove, and a guiding inlet is provided at the end of the positioning block.

[0010] The positioning prism structure includes an outer positioning cylinder, and the outer positioning cylinder is assembled between two positioning heads; a storage bladder is installed inside the outer positioning cylinder, and the storage bladder is distributed along the axial center line of the outer positioning cylinder; the storage bladder is used to store fire extinguishing materials. In case of impact, especially after the multi-stage misalignment energy absorption fails, the storage bladder and the outer positioning cylinder on the positioning prism structure are squeezed and broken, and the fire extinguishing materials stored inside the storage bladder will be released and released around the lithium battery, or the storage bladder will rupture during the combustion process to release the fire extinguishing materials; fire extinguishing and fire blocking are achieved; at the same time, it can also overcome the problem that when the fire extinguishing pipeline is damaged, the fire extinguishing materials cannot be delivered to the fire source position through the pipeline.

[0011] The positioning prism structure further includes a plurality of push plates and a plurality of partition plates, and the plurality of push plates and the plurality of partition plates are both arrayed around the outer positioning cylinder; the push plates and the partition plates are both movably inserted through the outer positioning cylinder and limited by safety buckles; the plurality of push plates and the plurality of partition plates are alternately distributed in sequence around the outer positioning cylinder.

[0012] The positioning prism structure further includes a plurality of discharge gaps, and the discharge gaps are provided on the outer positioning cylinder and are distributed parallel to the axial center line of the outer positioning cylinder; the discharge gaps are used to communicate the inside and outside of the outer positioning cylinder; the plurality of discharge gaps are sequentially distributed in the gaps between the plurality of push plates and the plurality of partition plates; an arc-shaped push plate is provided at the end of the push plate inside the outer positioning cylinder, and the arc-shaped push plate is attached to the storage bladder; a second wedge surface is provided on both sides of the push plate, and the second wedge surface is used to ensure that the push plate is inserted into the outer positioning cylinder after being squeezed at multiple angles and to urge the arc-shaped push plate to squeeze the storage bladder; arc-shaped surfaces are provided on both sides of the partition plate, and the arc-shaped surfaces are used to match the appearance radian of the lithium battery; the partition plate is used to squeeze the storage bladder after being toggled.

[0013] Further solution: The unit lithium battery rack further includes a plurality of conveying racks, and the plurality of conveying racks are all installed on the outer limiting frame; the conveying rack includes a U-shaped fixing plate and a plurality of conveying plates arrayed on the U-shaped fixing plate; The U-shaped fixing plate is installed on the outer limit frame; pipelines are laid on the U-shaped fixing plate, and the pipelines are connected to multiple unit positioning frames through multiple conveying plates.

[0014] Compared with the prior art, the beneficial effects of the impact-resistant and safely lockable lithium battery plastic shell of the present invention are as follows: 1) From multiple lithium battery limit frames to multiple unit lithium battery frames, and then to multiple unit positioning frames on the lithium battery positioning frame, the lithium batteries are formed into multi-level units. After being impacted, the dislocation telescopic device 1 is used to form a dislocation protection with the adjacent unit lithium battery frame after the unit lithium battery frame is impacted; and the dislocation telescopic device 2 is used to form a dislocation protection with the adjacent unit positioning frame after the unit positioning frame is impacted, realizing multi-level dislocation energy absorption, transferring the lithium batteries in the impact area, avoiding the lithium batteries in the impact area from impacting the lithium batteries in the non-impact area, and completing the protection of the lithium batteries in the non-impact area; that is, dividing the impact area and the non-impact area, and performing reasonable locking protection, which can also protect the fire extinguishing pipeline to avoid the occurrence of spontaneous combustion incidents; 2) When encountering an impact, especially after the multi-level dislocation energy absorption fails, the storage bag and the outer positioning cylinder on the positioning prism structure are squeezed and broken, and the fire extinguishing materials stored inside the storage bag will be released and released around the lithium battery, or the storage bag can also release the fire extinguishing materials during the combustion process; realizing fire extinguishing and fire blocking; at the same time, it can also overcome the problem that when the fire extinguishing pipeline is damaged, the fire extinguishing materials cannot be delivered to the fire source position through the pipeline; 3) Since the overall lithium battery pack needs to be integrated, the positioning prism structure needs to be set between four adjacent positioning holes to form a relatively large unused blind area for full layout and utilization of space as a whole; but this also results in a limited amount of fire extinguishing materials stored inside the positioning prism structure. The setting of the push plate can ensure that the push plate penetrates into the outer positioning cylinder after being squeezed from multiple angles, and the arc-shaped push plate is used to squeeze the storage bag to break the storage bag; and the partition plate squeezes the storage bag to break the storage bag after being toggled, so that the fire extinguishing materials inside the storage bag can be sprayed onto the lithium battery through multiple discharge gaps for protection, achieving the effect of fire extinguishing and fire blocking while reducing the amount of fire extinguishing materials and occupying less space; at the same time, it can also overcome the problem that when the fire extinguishing pipeline is damaged, the fire extinguishing materials cannot be delivered to the fire source position through the pipeline; 4) When the pipeline is exhausted or blown, the gas can flow along the pipeline, the air inlet and the material inlet, realizing full mobilization of the airflow around the lithium battery for precise and efficient heat dissipation inside the highly integrated battery pack; at the same time, when there is no impact, the fire extinguishing materials can also be precisely delivered through the pipeline, the air inlet and the material inlet to cope with the situation of short-circuit fire. Description of the Drawings

[0015] Figure 1Schematic diagram of the structure of the plastic shell of the impact-resistant and safely lockable lithium battery according to the present invention; Figure 2 Schematic diagram of the structure of the lithium battery limiting frame in the present invention; Figure 3 For Figure 2 Schematic diagram of the structure of the unit lithium battery rack in; Figure 4 For Figure 3 Explosion diagram of the unit lithium battery rack in; Figure 5 For Figure 4 Schematic diagram of the structure of the conveying rack in; Figure 6 For Figure 4 Schematic diagram of the structure of the outer limiting frame in; Figure 7 For Figure 4 Schematic diagram of the structure of the lithium battery positioning frame in; Figure 8 For Figure 7 Schematic diagram of the structure of the unit positioning frame in; Figure 9 For Figure 2 Demonstration diagram of energy absorption due to collision misalignment of the lithium battery limiting frame in; Figure 10 For Figure 9 Front view of; Figure 11 For Figure 8 Schematic diagram of the structure of the positioning prism structure in; Figure 12 For Figure 11 Schematic diagram of the structure of the positioning head in; Figure 13 For Figure 11 Schematic diagram of the structure of the positioning prism in.

[0016] In the figure: 1. Lithium battery box, 2. Outer retaining frame, 3. Lithium battery limiting frame, 4. Unit lithium battery rack, 5. Misalignment demonstration area 1, 6. Misalignment demonstration area 2; 100. Conveying rack, 200. Lithium battery positioning frame, 300. Outer limiting frame; 110. Conveying plate, 120. U-shaped fixing plate; 210. Unit positioning frame; 211. Positioning prism structure, 212. Positioning hole, 213. Positioning frame body, 214. Wedge surface 1, 215. Positioning head, 216. Positioning prism; 2151. Inlet, 2152. Positioning block, 2153. Arc groove, 2154. Feeding port; 2161. Storage bag, 2162. Outer positioning cylinder, 2163. Arc-shaped push plate, 2164. Push plate, 2165. Discharge gap, 2166. Wedge surface 2, 2167. Partition; 310. Electric telescopic rod, 320. Support plate. Detailed implementation manners

[0017] The technical solutions of the present invention will be further described in detail below in conjunction with specific implementation manners. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0018] In the embodiment of the present invention, please refer to Figure 1 and Figure 2 : A safety-lockable lithium battery plastic case for coping with impacts, including a lithium battery box 1 installed on a vehicle body through an outer holder 2. The lithium battery box 1 includes a plurality of lithium battery limit frames 3, and a plurality of unit lithium battery frames 4 are defined on each lithium battery limit frame 3; Regarding the structure of the outer holder 2 itself and the way the outer holder 2 installs the lithium battery box 1 on the vehicle body, they are all prior arts. For example, the outer holder 2 can be installed by distributing multiple fixing plates around the plurality of unit lithium battery frames 4 of the plurality of lithium battery limit frames 3; and the outer holder 2 is installed on the vehicle body through multiple bolts; its detailed structure can be known from existing literature and periodicals, and it can also be directly purchased on the market, etc.; it is not what the present invention intends to protect and will not be elaborated in detail here; During use, the lithium batteries are sequentially assembled onto the plurality of unit lithium battery frames 4 of the plurality of lithium battery limit frames 3, and the plurality of unit lithium battery frames 4 complete the installation of the lithium batteries to form a multi-unit structure; The arrangement manners of the plurality of lithium battery limit frames 3 and the plurality of unit lithium battery frames 4 can be multi-row and multi-column distribution, or can be single-row and multi-column distribution, or can be multi-row and single-column distribution, etc. There is no limitation on the specific arrangement manner, as long as the lithium batteries can be installed to form a multi-unit structure; Refer to Figure 3 , Figure 4 and Figures 6 - 8 : The unit lithium battery frame 4 includes a lithium battery positioning frame 200 and an outer limit frame 300. The outer limit frame 300 is sleeved outside the lithium battery positioning frame 200 and is used for installing and positioning the lithium battery positioning frame 200; The outer limit frame 300 is provided with a support plate 320 on its side edge. The support plate 320 is integrally and fixedly connected to the outer limit frame 300; A plurality of displacement expansion devices one are installed on the support plate 320; The displacement expansion device one is used for forming a displacement protection with the adjacent unit lithium battery frame 4 after the unit lithium battery frame 4 is impacted (for details, refer to Figure 10 the displacement demonstration area two 6 in It should be added that: "On which sides of the outer limit frame 300 the support plates 320 are arranged and the corresponding quantities" can be that two support plates 320 are distributed on two adjacent sides of the outer limit frame 300, or two support plates 320 are distributed on two opposite sides of the outer limit frame 300, or three support plates 320 are continuously distributed on the sides of the outer limit frame 300, or four support plates 320 are continuously distributed on the sides of the outer limit frame 300; specifically, what the quantity of the support plates 320 is or what the distribution method is needs to be combined with the position where the outer limit frame 300 is located. For example, when the outer limit frame 300 is in the middle, four support plates 320 need to be continuously distributed on the sides of the outer limit frame 300, and when the outer limit frame 300 is at a corner, two support plates 320 are distributed on two opposite sides of the outer limit frame 300, etc. All of these can be designed according to the actual usage situation, which is not what the present invention aims to protect and will not be elaborated in detail herein; The lithium battery positioning frame 200 includes a plurality of unit positioning frames 210. A dislocation telescopic device two is arranged between the plurality of unit positioning frames 210. The dislocation telescopic device two is used to form a dislocation protection with the adjacent unit positioning frame 210 after the unit positioning frame 210 is impacted (for details, refer to Figure 10 the dislocation demonstration area one 5 in); the unit positioning frame 210 is used to complete the installation of lithium batteries into a multi-unit form; Therefore, from the plurality of lithium battery limit frames 3 to the plurality of unit lithium battery frames 4, and then to the plurality of unit positioning frames 210 on the lithium battery positioning frame 200, a multi-level unitization of lithium batteries is formed. After being impacted, the dislocation telescopic device one is used to form a dislocation protection with the adjacent unit lithium battery frame 4 after the unit lithium battery frame 4 is impacted; and the dislocation telescopic device two is used to form a dislocation protection with the adjacent unit positioning frame 210 after the unit positioning frame 210 is impacted, realizing multi-level dislocation energy absorption, transferring the lithium batteries in the impact area, avoiding the lithium batteries in the impact area from impacting the lithium batteries in the non-impact area, and completing the protection of the lithium batteries in the non-impact area; that is, dividing the impact area and the non-impact area, performing reasonable locking protection, and also being able to protect the fire extinguishing pipeline to avoid the occurrence of spontaneous combustion events; It solves the problem that when being impacted, especially in a car accident, the lithium battery box is easily impacted. If no corresponding protection and energy absorption mechanism is added, the batteries that are not impacted will also be damaged. At the same time, after the battery is damaged, especially when the fire extinguishing pipeline is also damaged, spontaneous combustion will occur when encountering an open flame, and the batteries that are not impacted will also be damaged; that is, the prior art does not divide the impact area and the non-impact area for reasonable locking protection.

[0019] In the embodiment of the present invention, please refer to Figure 6: The dislocation telescopic device 1 includes an electric telescopic rod 310; the dislocation telescopic device 2 includes a guiding slider, on which a first wedge surface 214 is provided (it should be noted that the first wedge surfaces 214 of adjacent unit positioning frames 210 are in opposite states), and a guiding component is provided on the first wedge surface 214.

[0020] Therefore, after being impacted, the electric telescopic rod 310 in the impact area is triggered. After the electric telescopic rod 310 extends, it can drive two adjacent unit lithium battery racks 4 into a dislocation state, completing the dislocation protection of the unit lithium battery rack 4 with the adjacent unit lithium battery rack 4 after being impacted by using the dislocation telescopic device 1; and after being impacted, the guiding sliders on two adjacent unit positioning frames 210 in the impact area are triggered. The guiding sliders drive two adjacent unit positioning frames 210 into a dislocation state along the guiding component through the first wedge surface 214, completing the dislocation protection of the unit positioning frame 210 with the adjacent unit positioning frame 210 after being impacted by using the dislocation telescopic device 2.

[0021] Regarding the "electric telescopic rod 310", it should be noted that the electric telescopic rod 310 can be replaced by a hydraulic telescopic rod, or can be replaced by a hydraulic telescopic rod, etc. These are all existing technologies, and there is no limitation on its specific structure, as long as it can meet the requirement of forming dislocation protection between the unit lithium battery rack 4 and the adjacent unit lithium battery rack 4 after the unit lithium battery rack 4 is impacted; at the same time, it can be directly purchased on the market, and there are also relevant descriptions in the corresponding periodicals and literatures, which are not what the present invention aims to protect and will not be elaborated in detail here.

[0022] The guiding component includes a guiding groove and a guiding rib. The guiding groove is provided on the first wedge surface 214 of one unit positioning frame 210, and the guiding rib is provided on the first wedge surface 214 of the adjacent other unit positioning frame 210; the guiding rib is slidably assembled on the guiding groove, and a spring is arranged inside the guiding groove, and the spring is used for energy absorption when the guiding rib slides inside the guiding groove.

[0023] In the embodiment of the present invention, please refer to Figure 8 : The unit positioning frame 210 includes a positioning frame body 213, and a cavity is provided inside the positioning frame body 213; a plurality of positioning holes 212 are provided on the positioning frame body 213, and the plurality of positioning holes 212 are distributed in multiple rows and columns on the positioning frame body 213.

[0024] Please refer to Figure 8 and Figure 11 : A plurality of positioning prism structures 211 are provided on the positioning frame body 213, and the plurality of positioning prism structures 211 are arranged in an array between the plurality of positioning holes 212.

[0025] It should be noted that a relatively large unused blind area will be formed between four adjacent positioning holes 212, and the positioning prism structure 211 is located in this area and can make good use of this area to fully layout and utilize the space as a whole.

[0026] In the embodiment of the present invention, please refer to Figure 11 and Figure 12 : The positioning prism structure 211 includes a positioning prism 216, and two positioning heads 215 distributed at both ends of the positioning prism 216; The positioning head 215 includes a positioning block 2152. An arc groove 2153 is respectively opened around the positioning block 2152. The radian of the arc groove 2153 is used to match a single-section lithium battery; a material guiding port 2154 is opened on the positioning block 2152 above and below the arc groove 2153, and a material guiding inlet 2151 is opened at the end of the positioning block 2152.

[0027] Please refer to Figure 11 and Figure 13 : The positioning prism structure 211 includes an outer positioning cylinder 2162, and the outer positioning cylinder 2162 is assembled between two positioning heads 215; a storage bladder 2161 is installed inside the outer positioning cylinder 2162, and the storage bladder 2161 is distributed along the columnar center line of the outer positioning cylinder 2162; the storage bladder 2161 is used to store fire extinguishing materials.

[0028] Regarding the "material of the storage bladder 2161", it should be noted that: it can be a plastic material, or it can be a rubber material, etc.; specifically what kind of material is not limited, as long as it can meet the requirement that the strength is lower than that of the battery material and the storage bladder 2161 can be broken under the premise of ensuring the integrity of the battery after the battery is extruded.

[0029] And the fire extinguishing material can be a shear thickening fluid (nano-silica particles, polyethylene glycol-based liquid and flame retardant), or it can be a microencapsulated flame retardant (such as perfluoropentanone, ammonium dihydrogen phosphate), etc. Specifically what kind of material is not limited, as long as it can meet the requirement of being able to extinguish fire and retard flame after release.

[0030] Therefore, in case of impact, especially after the multi-stage misalignment energy absorption fails, the storage bladder 2161 and the outer positioning cylinder 2162 on the positioning prism structure 211 are squeezed and broken, and the fire extinguishing material stored inside the storage bladder 2161 will be released and released around the lithium battery, or the storage bladder 2161 can also be broken during the combustion process to release the fire extinguishing material; to achieve fire extinguishing and fire retardance; at the same time, it can also overcome the problem that when the fire extinguishing pipeline is damaged, the fire extinguishing material cannot be delivered to the fire source position through the pipeline.

[0031] In the embodiment of the present invention, please refer to Figure 11 and Figure 13: The positioning prism structure 211 further includes a plurality of push plates 2164 and a plurality of partition plates 2167, and the plurality of push plates 2164 and the plurality of partition plates 2167 are both arranged in an array around the outer positioning cylinder 2162; the push plates 2164 and the partition plates 2167 are both movably inserted through the outer positioning cylinder 2162 and are limited by safety buckles; the plurality of push plates 2164 and the plurality of partition plates 2167 are alternately distributed in sequence around the outer positioning cylinder 2162.

[0032] Regarding the "safety buckle", it should be noted that the safety buckle is set to ensure that the push plate 2164 and the partition plate 2167 are stably and movably inserted through a certain position of the outer positioning cylinder 2162. After being impacted, the lithium battery breaks the safety buckle, or the safety buckle is directly broken, which can release the push plate 2164 and the partition plate 2167, so as to squeeze the storage bladder 2161 and release the fire extinguishing materials inside the storage bladder 2161.

[0033] In the embodiment of the present invention, please refer to Figures 11 - 13 : The positioning prism structure 211 further includes a plurality of discharge gaps 2165, and the discharge gaps 2165 are opened on the outer positioning cylinder 2162 and are distributed parallel to the axial center line of the outer positioning cylinder 2162; the discharge gaps 2165 are used to connect the inside and outside of the outer positioning cylinder 2162; The plurality of discharge gaps 2165 are sequentially distributed in the gaps between the plurality of push plates 2164 and the plurality of partition plates 2167; An arc-shaped push plate 2163 is provided at the end of the push plate 2164 inside the outer positioning cylinder 2162, and the arc-shaped push plate 2163 is attached to the storage bladder 2161; a second wedge surface 2166 is provided on both sides of the push plate 2164, and the second wedge surface 2166 is used to ensure that the push plate 2164 is inserted into the outer positioning cylinder 2162 after being squeezed at multiple angles, and to urge the arc-shaped push plate 2163 to squeeze the storage bladder 2161; Arc-shaped surfaces are provided on both sides of the partition plate 2167, and the arc-shaped surfaces are used to match the appearance radian of the lithium battery; the partition plate 2167 is used to squeeze the storage bladder 2161 after being toggled.

[0034] Therefore, since the overall lithium battery pack needs to be integrally arranged, the positioning prism structure 211 needs to be arranged between four adjacent positioning holes 212, which will form a relatively large unused blind area for sufficient overall layout and utilization of space. However, this also results in a limited amount of fire extinguishing material stored inside the positioning prism structure 211. The setting of the push plate 2164 can ensure that the push plate 2164 penetrates into the outer positioning cylinder 2162 after being squeezed from multiple angles, and prompts the arc-shaped push plate 2163 to squeeze the storage bladder 2161, crushing the storage bladder 2161. And when the partition plate 2167 is toggled, it squeezes the storage bladder 2161, crushing the storage bladder 2161. This can enable the fire extinguishing material inside the storage bladder 2161 to be sprayed onto the lithium battery through multiple discharge gaps 2165 for protection, achieving the effect of fire extinguishing and fire blocking while reducing the amount of fire extinguishing material and occupying less space. At the same time, it can also overcome the problem that when the fire extinguishing pipeline is damaged, the fire extinguishing material cannot be delivered to the fire source position through the pipeline.

[0035] In the embodiment of the present invention, please refer to Figures 3 - 5 : The unit lithium battery rack 4 further includes a plurality of conveying racks 100, and the plurality of conveying racks 100 are all installed on the outer limiting frame 300; the conveying rack 100 includes a U-shaped fixing plate 120 and a plurality of conveying plates 110 arranged in an array on the U-shaped fixing plate 120; The U-shaped fixing plate 120 is erected on the outer limiting frame 300; a pipeline is laid on the U-shaped fixing plate 120, and the pipeline is connected to a plurality of unit positioning racks 210 through a plurality of conveying plates 110 (it should be added that: the pipeline is connected to the inlet 2151 on the positioning head 215 through a plurality of connecting pipes on the plurality of conveying plates 110).

[0036] Therefore, when air is pumped or blown through the pipeline, the gas can flow along the pipeline, the inlet 2151 and the material guiding port 2154, realizing the full mobilization of the air flow around the lithium battery, so as to accurately and efficiently dissipate heat inside the highly integrated battery pack; at the same time, when there is no impact, the fire extinguishing material can also be accurately delivered through the pipeline, the inlet 2151 and the material guiding port 2154 to cope with the situation of short circuit and fire.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances. The above has described the preferred embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A plastic shell for a lithium battery that can be safely locked in response to impact, comprising a lithium battery box (1) installed on a vehicle body through an outer retainer (2), characterized in that the lithium battery box (1) includes a plurality of lithium battery limit frames (3), and a plurality of unit lithium battery frames (4) are defined on each lithium battery limit frame (3); The unit lithium battery frame (4) includes a lithium battery positioning frame (200) and an outer limit frame (300). The outer limit frame (300) is sleeved outside the lithium battery positioning frame (200) and is used for erecting and installing the lithium battery positioning frame (200); The outer limit frame (300) is provided with a support plate (320) on its side edge. The support plate (320) is integrally and fixedly connected to the outer limit frame (300); A plurality of misaligned telescopic devices one are installed on the support plate (320). The misaligned telescopic device one is used to form misalignment protection with the adjacent unit lithium battery frame (4) after the unit lithium battery frame (4) is impacted; The lithium battery positioning frame (200) includes a plurality of unit positioning frames (210). A misaligned telescopic device two is arranged between the plurality of unit positioning frames (210). The misaligned telescopic device two is used to form misalignment protection with the adjacent unit positioning frame (210) after the unit positioning frame (210) is impacted; The unit positioning frame (210) is used to complete the installation of the lithium battery into a multi-unit form.

2. The safety-lockable plastic case for lithium batteries capable of withstanding impacts according to claim 1, wherein The misaligned telescopic device one includes an electric telescopic rod (310); The misaligned telescopic device two includes a guiding slider, and a first wedge surface (214) is provided on the guiding slider. A guiding component is provided on the first wedge surface (214).

3. A plastic shell for a lithium battery that can be safely locked in response to impact according to claim 2, characterized in that, The guiding component includes a guiding groove and a guiding convex edge. The guiding groove is opened on the first wedge surface (214) of one unit positioning frame (210), and the guiding convex edge is provided on the first wedge surface (214) of the adjacent other unit positioning frame (210); The guiding convex edge is slidably assembled on the guiding groove, and a spring is arranged inside the guiding groove. The spring is used for energy absorption when the guiding convex edge slides inside the guiding groove.

4. A plastic shell for a lithium battery that can be safely locked in response to impact according to claim 1, characterized in that, The unit positioning frame (210) includes a positioning frame body (213), and a cavity is opened inside the positioning frame body (213); A plurality of positioning holes (212) are opened on the positioning frame body (213), and the plurality of positioning holes (212) are distributed in multiple rows and multiple columns on the positioning frame body (213).

5. A plastic case for a lithium battery that can be safely locked in response to impact, as claimed in claim 4, wherein A plurality of positioning prism structures (211) are arranged on the positioning frame body (213), and the plurality of positioning prism structures (211) are arranged in an array between the plurality of positioning holes (212).

6. A plastic shell for a lithium battery that can be safely locked in response to impact according to claim 5, characterized in that the positioning prism structure (211) includes a positioning prism (216), and two positioning heads (215) distributed at both ends of the positioning prism (216); The positioning head (215) includes a positioning block (2152). An arc-shaped groove (2153) is respectively formed around the positioning block (2152). The radian of the arc-shaped groove (2153) is used to match a single-section lithium battery. A material guiding port (2154) is formed on the positioning block (2152) above the arc-shaped groove (2153) and below the arc-shaped groove (2153). A guiding inlet (2151) is formed at the end of the positioning block (2152).

7. The safety-lockable plastic case for lithium batteries capable of coping with impacts according to claim 6, characterized in that, The positioning prism structure (211) includes an outer positioning cylinder (2162). The outer positioning cylinder (2162) is assembled between two positioning heads (215). A storage bladder (2161) is installed inside the outer positioning cylinder (2162). The storage bladder (2161) is distributed along the columnar center line of the outer positioning cylinder (2162). The storage bladder (2161) is used to store fire extinguishing materials.

8. A plastic case for a lithium battery that can be safely locked in response to impact according to claim 7, characterized in that, The positioning prism structure (211) further includes a plurality of push plates (2164) and a plurality of partition plates (2167). The plurality of push plates (2164) and the plurality of partition plates (2167) are both arranged in an array around the outer positioning cylinder (2162). The push plates (2164) and the partition plates (2167) are both movably inserted through the outer positioning cylinder (2162) and are limited by safety buckles. The plurality of push plates (2164) and the plurality of partition plates (2167) are alternately distributed in sequence around the outer positioning cylinder (2162).

9. The impact-resistant and safely lockable lithium battery plastic shell according to claim 8, characterized in that The positioning prism structure (211) further includes a plurality of discharge gaps (2165). The discharge gaps (2165) are formed on the outer positioning cylinder (2162) and are distributed parallel to the columnar center line of the outer positioning cylinder (2162). The discharge gaps (2165) are used to communicate the inside and outside of the outer positioning cylinder (2162). The plurality of discharge gaps (2165) are sequentially distributed in the gaps between the plurality of push plates (2164) and the plurality of partition plates (2167). An arc-shaped push plate (2163) is provided at the end of the push plate (2164) inside the outer positioning cylinder (2162). The arc-shaped push plate (2163) is attached to the storage bladder (2161). A second wedge surface (2166) is respectively provided on both sides of the push plate (2164). The second wedge surface (2166) is used to ensure that the push plate (2164) is inserted into the outer positioning cylinder (2162) after being squeezed from multiple angles and to prompt the arc-shaped push plate (2163) to squeeze the storage bladder (2161). Arc-shaped surfaces are provided on both sides of the partition plate (2167). The arc-shaped surfaces are used to match the appearance radian of the lithium battery. The partition plate (2167) is used to squeeze the storage bladder (2161) after being toggled.

10. The impact-resistant and safely lockable lithium battery plastic shell according to claim 1, characterized in that The single-unit lithium battery rack (4) further includes a plurality of conveying racks (100). The plurality of conveying racks (100) are all installed on the outer limiting frame (300). The conveying rack (100) includes a U-shaped fixing plate (120) and a plurality of conveying plates (110) arranged in an array on the U-shaped fixing plate (120). The U-shaped fixing plate (120) is erected on the outer limit frame (300); pipelines are laid on the U-shaped fixing plate (120), and the pipelines are connected to a plurality of unit positioning frames (210) through a plurality of conveying plates (110).

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