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, in particular to a lithium battery plastic case that can be safely locked against impact. Background Art

[0002] As the core protection unit of electric vehicle power batteries, lithium battery boxes must meet three core requirements: high safety, lightweight, and environmental adaptability. From a safety perspective, battery boxes must use explosion-proof design, flame-retardant materials, and multi-layer insulation structures to suppress the spread of thermal runaway. At the same time, they must meet IP67 / IP68 protection levels to resist rain, dust, and salt spray corrosion. For electric vehicle scenarios, battery boxes must also have efficient thermal management capabilities, using liquid cooling plates, thermal adhesives, or phase change materials to control the temperature difference of the battery cells within ±2°C to ensure battery life and performance. Structurally, mainstream designs tend 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 vehicle chassis to reduce the number of components.

[0003] The current evolution of electric vehicle lithium-ion battery packs focuses on high safety, high energy efficiency, and high integration, with material and structural innovations continuously pushing the boundaries of performance. With the widespread adoption of CTC technology and the commercialization of solid-state batteries, lithium-ion battery packs will gradually evolve from "passive protective containers" to "active safety hubs."

[0004] However, after being hit, especially during a car accident, the lithium battery box is easily hit. If no corresponding protective energy-absorbing mechanism is added, the battery that has not been hit will also be damaged. At the same time, after the battery is damaged, especially if the fire extinguishing pipeline is also damaged, if an open flame is encountered, a natural fire will occur, and the battery that has not been hit will also be damaged. That is, the existing technology does not divide the impact area and the non-impact area for reasonable locking protection. Summary of the Invention

[0005] In view of the problem that the existing technology does not divide the impact area and the non-impact area into reasonable locking protection areas, the present invention provides the following technical solutions to achieve the above objectives: A lithium battery plastic case that can be safely locked in response to impact, including a lithium battery box installed on a vehicle body through an external retaining frame, the lithium battery box including multiple lithium battery limit frames, each lithium battery limit frame is divided into multiple unit lithium battery frames; the unit lithium battery frame includes a lithium battery positioning frame and an external limit frame, the external limit frame is sleeved on the outside of the lithium battery positioning frame, and is used to erect and install the lithium battery positioning frame; the external limit frame is provided with a support plate on its side, and the support plate and the external limit frame are fixedly connected together as a whole; multiple dislocation and expansion devices 1 are installed on the support plate; the dislocation and expansion device 1 is used to form dislocation protection between the unit lithium battery frame and the adjacent unit lithium battery frame after the unit lithium battery frame is impacted; the lithium battery positioning frame includes multiple unit positioning frames, and the multiple unit positioning frames are provided with dislocation and expansion devices 2, and the dislocation and expansion devices 2 are used to , forming a dislocation protection with the adjacent unit positioning frame; the unit positioning frame is used to complete the installation of lithium batteries into multiple units; therefore, multiple lithium battery limit frames are connected to multiple unit lithium battery frames, and then to multiple unit positioning frames on the lithium battery positioning frame, forming a multi-level unit of lithium batteries. After being impacted, the dislocation expansion 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 expansion 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, performing reasonable locking protection, and also protecting the fire extinguishing pipeline to avoid the occurrence of spontaneous combustion incidents.

[0006] A further solution: The first dislocation telescopic device comprises an electric telescopic rod; the second dislocation telescopic device comprises a guide slider, which is provided with a wedge-shaped surface 1, and a guide assembly is provided on the wedge-shaped surface 1. After an impact, the electric telescopic rod in the impact area is triggered, and after the electric telescopic rod is extended, it can drive two adjacent unit lithium battery racks into a dislocation state, completing the dislocation protection of the first dislocation telescopic device after the unit lithium battery rack is impacted with the adjacent unit lithium battery rack; and after an impact, the guide slider on two adjacent unit positioning racks in the impact area is triggered, and the guide slider drives the two adjacent unit positioning racks into a dislocation state along the guide assembly via the wedge-shaped surface 1, completing the dislocation protection of the second dislocation telescopic device after the unit positioning rack is impacted with the adjacent unit positioning rack. The guide assembly includes a guide groove and a guide protrusion. The guide groove is opened on the wedge surface 1 of a unit positioning frame, and the guide protrusion is set on the wedge surface 1 of another adjacent unit positioning frame; the guide protrusion is slidably assembled on the guide groove, and a spring is set inside the guide groove. The spring is used to absorb energy when the guide protrusion slides inside the guide groove.

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

[0008] A further solution is that a plurality of positioning prism structures are provided on the positioning frame, and the plurality of positioning prism structures are arrayed and distributed between the plurality of positioning holes.

[0009] A 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 groove is opened around the positioning block, and the curvature of the arc groove is used to match a single lithium battery; a material guide port is opened on the positioning block located above and below the arc groove, and an inlet is opened at the end of the positioning block.

[0010] The positioning prism structure includes an outer positioning tube, which is assembled between two positioning heads. A storage bag is installed inside the outer positioning tube, distributed along the centerline of the outer positioning tube. The storage bag is used to store fire-extinguishing materials. In the event of an impact, especially if the multi-stage offset energy absorption fails, the storage bag and the outer positioning tube of the positioning prism structure are squeezed and ruptured, releasing the fire-extinguishing materials stored in the storage bag and releasing them into the area around the lithium battery. Alternatively, if the storage bag ruptures during combustion, the fire-extinguishing materials can be released, achieving both fire extinguishing and fire-blocking. This also overcomes the problem of fire-extinguishing pipes being unable to deliver fire-extinguishing materials to the fire source through the pipes when damaged.

[0011] The positioning prism structure also includes multiple push plates and multiple partitions, which are distributed in an array around the outer positioning tube; the push plates and partitions are movably inserted into the outer positioning tube and limited by safety buckles; the multiple push plates and multiple partitions are distributed alternately around the outer positioning tube.

[0012] The positioning prism structure also includes a plurality of discharge gaps, which are opened on the outer positioning cylinder and are distributed parallel to the center line of the outer positioning cylinder; the discharge gaps are used to connect the inside and outside of the outer positioning cylinder; the plurality of discharge gaps are distributed in sequence in the gaps between a plurality of push plates and a plurality of partitions; the push plate is provided with an arc-shaped push plate on the end head inside the outer positioning cylinder, and the arc-shaped push plate is fitted on the storage bag; a wedge-shaped surface 2 is provided on both sides of the push plate, and the wedge-shaped surface 2 is used to ensure that the push plate is inserted into the outer positioning cylinder after being squeezed at multiple angles, and to prompt the arc-shaped push plate to squeeze the storage bag; arc-shaped surfaces are provided on both sides of the partition, and the arc-shaped surfaces are used to match the external curvature of the lithium battery; the partition is used to squeeze the storage bag after being pushed.

[0013] Further solution: the unit lithium battery rack further comprises a plurality of conveying racks, and the plurality of conveying racks are all mounted on the outer limit frame; the conveying rack comprises a U-shaped fixing plate and a plurality of conveying plates arranged in an array on the U-shaped fixing plate; The U-shaped fixing plate is mounted 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 lockable lithium battery plastic case of the present invention are as follows: 1) Multiple lithium battery limit racks are connected to multiple unit lithium battery racks, and then to multiple unit positioning racks on the lithium battery positioning rack, forming a multi-level unit of lithium batteries. After being impacted, the first dislocation expansion device is used to form a dislocation protection between the unit lithium battery rack and the adjacent unit lithium battery rack after the unit lithium battery rack is impacted; and the second dislocation expansion device is used to form a dislocation protection between the unit positioning rack and the adjacent unit positioning rack after the unit positioning rack is impacted, realizing multi-level dislocation energy absorption, transferring the lithium batteries in the impact area, preventing 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, the impact area and the non-impact area are divided, and reasonable locking protection is performed, which can also protect the fire extinguishing pipeline to avoid the occurrence of spontaneous combustion incidents; 2) In the event of an impact, especially when the multi-stage dislocation energy absorption fails, the storage capsule and the outer positioning cylinder on the positioning prism structure are squeezed and broken, and the fire extinguishing material stored in the storage capsule will be released and released around the lithium battery. Alternatively, the storage capsule can also rupture during combustion to release the fire extinguishing material, thus achieving fire extinguishing and fire blocking. At the same time, it can also overcome the problem of fire extinguishing materials being unable to be delivered to the fire source through the pipeline when the fire extinguishing pipeline is damaged. 3) Since the overall lithium battery pack needs to be integrated, it is necessary to set the positioning prism structure between the four adjacent positioning holes, which will form a relatively large unused blind area in order to fully layout and utilize the space as a whole; however, this also results in the limited amount of fire extinguishing materials stored inside the positioning prism structure. The setting of the push plate can ensure that the push plate is inserted into the outer positioning cylinder after being squeezed at multiple angles, and prompt the arc-shaped push plate to squeeze the storage bag and break the storage bag; and the partition squeezes the storage bag after being toggled to break the storage bag, so that the fire extinguishing material inside the storage bag can be sprayed onto the lithium battery through multiple discharge gaps for protection, thereby ensuring the fire extinguishing and fire-blocking effect on the basis of reducing the amount of fire extinguishing material and taking up less space; at the same time, it can also overcome the problem that the fire extinguishing material cannot be delivered to the fire source through the pipeline when the fire extinguishing pipeline is damaged; 4) When exhausting or blowing air into the pipeline, the gas can flow along the pipeline, inlet and material guide port, fully mobilizing the airflow around the lithium battery for accurate and efficient heat dissipation inside the highly integrated battery pack; at the same time, when there is no impact, fire extinguishing materials can be accurately delivered through the pipeline, inlet and material guide port to deal with short circuit fire situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic structural diagram of a lithium battery plastic case that can be safely locked against impact according to the present invention; Figure 2 This is a schematic structural diagram of the lithium battery limit frame of the present invention; Figure 3 for Figure 2 Schematic diagram of the structure of the mid-unit lithium battery rack; Figure 4 for Figure 3 Exploded view of a mid-unit lithium battery rack; Figure 5 for Figure 4 Schematic diagram of the structure of the middle conveyor frame; Figure 6 for Figure 4 Schematic diagram of the structure of the inner and outer limit frames; Figure 7 for Figure 4 Schematic diagram of the structure of the lithium battery positioning frame; Figure 8 for Figure 7 Schematic diagram of the structure of the middle unit positioning frame; Figure 9 for Figure 2 Demonstration diagram of collision dislocation energy absorption of lithium battery limit frame; Figure 10 for Figure 9 The main view; Figure 11 for Figure 8 Schematic diagram of the structure of the central positioning prism structure; Figure 12 for Figure 11 Schematic diagram of the structure of the positioning head; Figure 13 for Figure 11 Schematic diagram of the structure of the positioning prism.

[0016] In the picture: 1. Lithium battery box, 2. External retainer, 3. Lithium battery limiter, 4. Unit lithium battery rack, 5. Dislocation demonstration area 1, 6. Dislocation demonstration area 2; 100, conveyor frame, 200, lithium battery positioning frame, 300, external limit 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-shaped surface 1; 215. Positioning head; 216. Positioning prism; 2151. Inlet; 2152. Positioning block; 2153. Arc-shaped groove; 2154. Material guide port; 2161. Material storage bag; 2162. External positioning cylinder; 2163. Arc-shaped push plate; 2164. Push plate; 2165. Discharge gap; 2166. Wedge-shaped surface 2; 2167. Partition plate; 310. Electric telescopic rod, 320. Support plate. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. In the description of the present invention, unless otherwise specified, "a plurality of" means two or more.

[0018] In the embodiment of the present invention, please refer to Figure 1 and Figure 2 A lithium battery plastic case that can be safely locked against impact, comprising a lithium battery box 1 mounted on a vehicle body via an outer retaining frame 2, wherein the lithium battery box 1 comprises a plurality of lithium battery limiting frames 3, each of which is divided into a plurality of unit lithium battery frames 4; The structure of the outer holder 2 itself and the way in which the outer holder 2 mounts the lithium battery box 1 on the vehicle body are both prior art. For example, the outer holder 2 can be mounted on the vehicle body by distributing a plurality of fixing plates around a plurality of unit lithium battery racks 4 of a plurality of lithium battery limit racks 3; and the outer holder 2 is mounted on the vehicle body by a plurality of bolts. The detailed structure thereof can be found in existing literature journals and can also be purchased directly on the market. It is not intended to be protected by the present invention and will not be elaborated on here. When in use, the lithium batteries are sequentially assembled onto the multiple unit lithium battery racks 4 of the multiple lithium battery limiting racks 3, and the multiple unit lithium battery racks 4 complete the installation of the lithium batteries into multiple units; The arrangement of the multiple lithium battery limiting racks 3 and the multiple unit lithium battery racks 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. The specific arrangement is not limited as long as the lithium batteries can be installed into multiple units; See Figure 3 、 Figure 4 and Figure 6-Figure 8 : The unit lithium battery rack 4 includes a lithium battery positioning frame 200 and an outer limit frame 300. The outer limit frame 300 is sleeved on the outside of the lithium battery positioning frame 200 for mounting the lithium battery positioning frame 200. The outer limit frame 300 is provided with a support plate 320 on its side, and the support plate 320 is fixedly connected to the outer limit frame 300 in an integral manner; a plurality of dislocation expansion and contraction devices 1 are mounted on the support plate 320; the dislocation expansion and contraction devices 1 are used to form a 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 hit (for details, please refer to Figure 10 (6) 320 , and the like. The lithium battery positioning frame 200 includes a plurality of unit positioning frames 210, and a dislocation expansion device 2 is provided between the plurality of unit positioning frames 210. The dislocation expansion device 2 is used to form a dislocation protection with the adjacent unit positioning frames 210 after the unit positioning frame 210 is hit (for details, please refer to Figure 10 The unit positioning frame 210 is used to complete the installation of lithium batteries into multiple units; Therefore, multiple lithium battery limit racks 3 are connected to multiple unit lithium battery racks 4, and then to multiple unit positioning racks 210 on the lithium battery positioning rack 200, forming a multi-level unit of lithium batteries. After being impacted, the first dislocation expansion device is used to form a dislocation protection between the unit lithium battery rack 4 and the adjacent unit lithium battery rack 4 after being impacted; and the second dislocation expansion device is used to form a dislocation protection between the unit positioning rack 210 and the adjacent unit positioning rack 210 after being impacted, thereby realizing multi-level dislocation energy absorption, transferring the lithium batteries in the impact area, and preventing the lithium batteries in the impact area from impacting the lithium batteries in the non-impact area, thereby completing the protection of the lithium batteries in the non-impact area; that is, the impact area and the non-impact area are divided, and reasonable locking protection is performed, which can also protect the fire extinguishing pipeline to avoid the occurrence of spontaneous combustion incidents; The invention solves the problem that after being hit, especially during a car accident, the lithium battery box is easily hit. If no corresponding protective energy-absorbing mechanism is added, the battery that has not been hit will also be damaged. At the same time, after the battery is damaged, especially the fire extinguishing pipeline is also damaged, if an open flame is encountered, a natural fire will also occur, so that the battery that has not been hit will also be damaged. That is, the existing technology 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 staggered telescopic device 1 includes an electric telescopic rod 310; the staggered telescopic device 2 includes a guide slider, which has a wedge-shaped surface 214 (it should be noted that the wedge-shaped surfaces 214 of adjacent unit positioning frames 210 are opposite), and a guide component is provided on the wedge surface 214.

[0020] Therefore, after being hit, the electric telescopic rod 310 in the impact area is triggered, and after the electric telescopic rod 310 is extended, the two adjacent unit lithium battery racks 4 can be driven into a dislocated state, completing the use of the dislocation telescopic device 1 to form a 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 hit; and after being hit, the guide sliders on the two adjacent unit positioning racks 210 in the impact area are triggered, and the guide sliders drive the two adjacent unit positioning racks 210 into a dislocated state along the guide assembly through the wedge surface 1 214, completing the use of the dislocation telescopic device 2 to form a dislocation protection between the unit positioning rack 210 and the adjacent unit positioning rack 210 after the unit positioning rack 210 is hit.

[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., which are all existing technologies. There is no restriction on its specific structure, as long as it can meet the requirements of misalignment protection between the unit lithium battery rack 4 and the adjacent unit lithium battery rack 4 after the unit lithium battery rack 4 is hit; at the same time, it can be purchased directly on the market, and there are related descriptions in corresponding journals and literature. It is not what the present invention wants to protect, so it will not be elaborated here.

[0022] The guide assembly includes a guide groove and a guide protrusion. The guide groove is opened on the wedge surface 214 of a unit positioning frame 210, and the guide protrusion is set on the wedge surface 214 of another adjacent unit positioning frame 210; the guide protrusion is slidably assembled on the guide groove, and a spring is set inside the guide groove. The spring is used to absorb energy when the guide protrusion slides inside the guide 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 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 columns on the positioning frame body 213.

[0024] See also Figure 8 and Figure 11 : A plurality of positioning prism structures 211 are provided on the positioning frame 213, and the plurality of positioning prism structures 211 are distributed in an array between the plurality of positioning holes 212.

[0025] It should be supplemented that a relatively large unused blind area is formed between four adjacent positioning holes 212, and the positioning prism structure 211 is located in this area, which can make good use of this area so as to fully layout and utilize 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, and an arc groove 2153 is provided around the positioning block 2152. The curvature of the arc groove 2153 is used to match a single lithium battery; a material guide port 2154 is provided on the positioning block 2152 located above and below the arc groove 2153, and an inlet 2151 is provided at the end of the positioning block 2152.

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

[0028] Regarding the "material of the storage capsule 2161", it should be noted that it can be a plastic material, or a rubber material, etc.; there is no restriction on the specific material, as long as the strength is lower than that of the battery material, the storage capsule 2161 can be broken under the premise of ensuring the integrity of the battery after being squeezed.

[0029] 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 perfluorohexanone, ammonium dihydrogen phosphate), etc. There is no restriction on the specific material, as long as it can extinguish fire and retard flames after release.

[0030] Therefore, when encountering an impact, especially when the multi-stage dislocation energy absorption fails, the storage bag 2161 and the outer positioning tube 2162 on the positioning prism structure 211 are squeezed and broken, and the fire extinguishing material stored in the storage bag 2161 will be released and released around the lithium battery, or the storage bag 2161 can also release the fire extinguishing material when it ruptures during the combustion process, thereby achieving fire extinguishing and fire blocking; at the same time, it can also overcome the problem that the fire extinguishing material cannot be delivered to the fire source through the pipeline when the fire extinguishing pipeline is damaged.

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

[0032] Regarding the "safety buckle", it should be explained that the safety buckle is set to ensure that the push plate 2164 and the partition 2167 can move stably and penetrate a certain position of the outer positioning cylinder 2162. After being impacted, the lithium battery will break the safety buckle, or the safety buckle will be directly broken, which can release the push plate 2164 and the partition 2167, thereby squeezing the storage bag 2161 and releasing the fire extinguishing material inside the storage bag 2161.

[0033] In the embodiment of the present invention, please refer to Figure 11-13 The positioning prism structure 211 further includes a plurality of discharge slots 2165 , which are provided on the outer positioning cylinder 2162 and are arranged parallel to the center line of the outer positioning cylinder 2162 ; the discharge slots 2165 are used to connect the inside and outside of the outer positioning cylinder 2162 ; The plurality of discharge slits 2165 are sequentially distributed in the gaps between the plurality of push plates 2164 and the plurality of partition plates 2167; The push plate 2164 is provided with an arc-shaped push plate 2163 at the end inside the outer positioning cylinder 2162. The arc-shaped push plate 2163 fits on the storage bag 2161. A second wedge-shaped surface 2166 is provided on both sides of the push plate 2164. The second wedge-shaped 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 cause the arc-shaped push plate 2163 to squeeze the storage bag 2161. Both sides of the partition 2167 are provided with curved surfaces, and the curved surfaces are used to match the curvature of the appearance of the lithium battery; the partition 2167 is used to squeeze the storage capsule 2161 when being moved.

[0034] Therefore, since the entire lithium battery pack needs to be integrated, it is necessary to arrange the positioning prism structure 211 between the four adjacent positioning holes 212, which will form a relatively large unused blind area in order to fully layout and utilize the space. However, this also results in a limited amount of fire extinguishing material stored inside the positioning prism structure 211. The arrangement of the push plate 2164 can ensure that the push plate 2164 is inserted into the outer positioning cylinder 2162 after being squeezed at multiple angles, and promote the arc-shaped push plate 2163 to By squeezing the storage bag 2161 and breaking it, and by the partition 2167 squeezing the storage bag 2161 and breaking it after being toggled, the fire extinguishing material inside the storage bag 2161 can be sprayed onto the lithium battery through multiple discharge gaps 2165 for protection, thereby ensuring the fire extinguishing and fire-blocking effects on the basis of reducing the amount of fire extinguishing material and occupying less space; at the same time, it can also overcome the problem that the fire extinguishing material cannot be delivered to the fire source through the pipeline when the fire extinguishing pipeline is damaged.

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

[0036] Therefore, when exhausting or blowing air into the pipeline, the gas can flow along the pipeline, the inlet 2151 and the material guide port 2154, so as to fully mobilize the airflow 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, fire extinguishing materials can also be accurately delivered through the pipeline, the inlet 2151 and the material guide port 2154 to deal with short circuit fire situations.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on specific circumstances. The above describes 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 ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A lithium battery plastic case that can be safely locked against impact, comprising a lithium battery box (1) mounted on a vehicle body via an outer retainer (2), characterized in that: The lithium battery box (1) comprises a plurality of lithium battery limiting frames (3), and each lithium battery limiting frame (3) is divided into a plurality of unit lithium battery frames (4); The unit lithium battery rack (4) comprises a lithium battery positioning rack (200) and an outer limiting frame (300), wherein the outer limiting frame (300) is sleeved on the outside of the lithium battery positioning rack (200) and is used for mounting the lithium battery positioning rack (200); The outer limit frame (300) is provided with a support plate (320) on its side, and the support plate (320) and the outer limit frame (300) are fixedly connected together in an integral manner; a plurality of dislocation expansion and contraction devices (1) are installed on the support plate (320); the dislocation expansion and contraction devices (1) are used to form 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 hit; The lithium battery positioning frame (200) comprises a plurality of unit positioning frames (210), wherein a second dislocation expansion device is provided between the plurality of unit positioning frames (210), and the second dislocation expansion device is used to form dislocation protection between the unit positioning frame (210) and 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 lithium batteries into multiple units.

2. The impact-resistant and lockable lithium battery plastic case according to claim 1, characterized in that: The first dislocation telescopic device comprises an electric telescopic rod (310); the second dislocation telescopic device comprises a guide slider, a wedge-shaped surface (214) is provided on the guide slider, and a guide component is provided on the wedge-shaped surface (214).

3. The impact-resistant and lockable lithium battery plastic case according to claim 2, characterized in that: The guide assembly includes a guide groove and a guide convex edge, wherein the guide groove is provided on a wedge-shaped surface 1 (214) of a unit positioning frame (210), and the guide convex edge is provided on a wedge-shaped surface 1 (214) of another adjacent unit positioning frame (210); the guide convex edge is slidably assembled on the guide groove, and a spring is provided inside the guide groove, and the spring is used to absorb energy when the guide convex edge slides inside the guide groove.

4. The impact-resistant and lockable lithium battery plastic case according to claim 1, characterized in that: The unit positioning frame (210) comprises a positioning frame body (213), wherein 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).

5. The impact-resistant and lockable lithium battery plastic case according to claim 4, characterized in that: A plurality of positioning prism structures (211) are provided on the positioning frame (213), and the plurality of positioning prism structures (211) are distributed in an array between the plurality of positioning holes (212).

6. The impact-resistant and lockable lithium battery plastic case 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) comprises a positioning block (2152), an arc-shaped groove (2153) is respectively provided around the positioning block (2152), and the curvature of the arc-shaped groove (2153) is used to match a single lithium battery; a material guide port (2154) is provided on the positioning block (2152) above and below the arc-shaped groove (2153), and an inlet (2151) is provided at the end of the positioning block (2152).

7. The impact-resistant and lockable lithium battery plastic case according to claim 6, characterized in that: The positioning prism structure (211) comprises an outer positioning cylinder (2162), which is assembled between two positioning heads (215); a storage bag (2161) is installed inside the outer positioning cylinder (2162), and the storage bag (2161) is distributed along the column center line of the outer positioning cylinder (2162); the storage bag (2161) is used to store fire extinguishing materials.

8. The impact-resistant and lockable lithium battery plastic case according to claim 7, characterized in that: The positioning prism structure (211) further includes a plurality of push plates (2164) and a plurality of partitions (2167), and the plurality of push plates (2164) and the plurality of partitions (2167) are distributed in an array around the outer positioning cylinder (2162); the push plates (2164) and the partitions (2167) are movably inserted into the outer positioning cylinder (2162) and are limited by safety buckles; the plurality of push plates (2164) and the plurality of partitions (2167) are distributed alternately around the outer positioning cylinder (2162).

9. The impact-resistant and lockable lithium battery plastic case according to claim 8, characterized in that: The positioning prism structure (211) further includes a plurality of discharge slits (2165), which are provided on the outer positioning cylinder (2162) and are arranged parallel to the center line of the outer positioning cylinder (2162); the discharge slits (2165) are used to connect the inside and outside of the outer positioning cylinder (2162); The plurality of discharge slits (2165) are sequentially distributed in the gaps between the plurality of push plates (2164) and the plurality of partition plates (2167); The push plate (2164) is provided with an arc-shaped push plate (2163) on the end of the inner portion of the outer positioning cylinder (2162), and the arc-shaped push plate (2163) is fitted on the storage bag (2161); a wedge-shaped surface (2166) is provided on both sides of the push plate (2164), and the wedge-shaped 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 promote the arc-shaped push plate (2163) to squeeze the storage bag (2161); Both sides of the partition (2167) are provided with curved surfaces, and the curved surfaces are used to match the curvature of the appearance of the lithium battery; the partition (2167) is used to squeeze the storage capsule (2161) after being toggled.

10. The impact-resistant and lockable lithium battery plastic case according to claim 1, characterized in that: The unit lithium battery rack (4) further comprises a plurality of conveying racks (100), each of which is mounted on an outer limit frame (300); the conveying rack (100) comprises 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 mounted on the outer limiting frame (300); pipelines are laid on the U-shaped fixing plate (120), and the pipelines are connected to the plurality of unit positioning frames (210) through the plurality of conveying plates (110).

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