High-safety impact-resistant lithium battery pack

Abstract

The invention relates to the technical field of lithium batteries, and discloses a high-safety anti-collision lithium battery pack, which comprises a shell, a plurality of battery bodies arranged in the shell, and anti-collision units symmetrically arranged on one sides of the battery bodies, the anti-collision unit comprises an anti-collision assembly arranged on one side of the battery body and an anti-collision performance improving assembly arranged in the anti-collision assembly; the anti-collision performance improving assembly is used for improving the anti-collision performance between the battery bodies, and the battery bodies are prevented from being damaged by high-strength collision. When the battery body is impacted, the rod body disperses force through rotation, the elastic assembly is stretched to absorb kinetic energy, hard impact is converted into elastic buffering, and the possibility that the battery body is directly extruded and deformed is reduced. The cross-hinged rod bodies can transmit local impact force to the periphery, and the force is further dispersed to the whole battery pack in cooperation with sliding of the rollers, so that the risk of single-point stress overload is reduced.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and in particular to a high-safety, impact-resistant lithium battery pack. Background Technology

[0002] Lithium-ion batteries are widely used in various devices, but collision safety remains a core concern. One of the core safety hazards of lithium-ion batteries is structural deformation caused by hard impacts (such as casing cracking and internal electrode short circuits), which can lead to accidents such as fires and explosions. Traditional battery packs often use rigid casings or simple cushioning materials for fixation, making it difficult to withstand complex impact scenarios: low-intensity vibrations can easily cause loosening between batteries, leading to poor contact; high-intensity impacts, due to the lack of graded cushioning mechanisms, can easily cause hard compression of the battery body, resulting in casing cracking, internal electrode short circuits, and even serious accidents such as fires and explosions.

[0003] Existing anti-collision designs have significant limitations: single elastic components exhibit lag in response to high-intensity impacts, resulting in insufficient energy absorption efficiency; and they cannot effectively achieve graded buffering against impacts of varying intensities, leading to hard collisions between lithium battery packs and reducing their safety performance and lifespan. These problems severely restrict the application of lithium batteries in fields with extremely high safety requirements, such as new energy vehicles and industrial robots, necessitating a stable and reliable anti-collision solution that can achieve graded buffering, dynamic adaptation, and robust stability. Summary of the Invention

[0004] Given the existing technology's problems of delayed response and insufficient energy absorption efficiency under high-intensity impacts, and its inability to effectively buffer impacts of varying intensities, resulting in hard collisions between lithium battery packs and reducing their safety performance and lifespan, a high-safety, impact-resistant lithium battery pack is proposed.

[0005] Its purpose is to address the pain points of traditional lithium battery packs in terms of collision safety, overcome the shortcomings of traditional fixing methods and existing anti-collision designs, cope with the problems caused by low-intensity vibration and high-intensity impact, achieve graded buffering, dynamic adaptation, stable and reliable anti-collision effect, improve safety performance and service life, and meet the needs of high safety fields.

[0006] The technical solution of the present invention is a high-safety and impact-resistant lithium battery pack, including a shell, a plurality of battery bodies disposed inside the shell, and an anti-collision unit symmetrically disposed on one side of the battery body; The anti-collision unit includes an anti-collision component disposed on one side of the battery body, and an anti-collision performance enhancement component disposed within the anti-collision component; the anti-collision performance enhancement component is used to enhance the anti-collision performance between battery bodies and avoid damage to the battery body caused by high-intensity impacts. The anti-collision assembly includes a mounting groove on one side of the battery body, an alignment groove on the other side of the battery body corresponding to the mounting groove, a first anti-collision bar at the bottom of the mounting groove, a second anti-collision bar in the middle of the first anti-collision bar with a hollow middle section, a first roller at one end of the first anti-collision bar, second rollers symmetrically arranged at both ends of the second anti-collision bar, with the first roller and one of the second rollers slidably connected in the alignment groove and the other second roller slidably connected in the mounting groove, and an elastic component in the middle of the first and second anti-collision bars, the elastic component being used to provide tension between the first and second anti-collision bars.

[0007] Furthermore, the elastic component includes a pull rod disposed on one side of the middle portion of the second anti-collision bar, a fixing rod disposed on one side of the middle portion of the first anti-collision bar, a tension spring disposed on the pull rod and the fixing rod, and a storage groove formed on the side of the first anti-collision bar facing the tension spring.

[0008] Furthermore, a slot is provided in the middle of the pull rod for the tension spring to engage and pull.

[0009] Furthermore, the anti-collision performance enhancement component includes a limiting groove opened on one side of the middle of the second anti-collision bar, a pull rod slidably connected in the limiting groove, and push blocks symmetrically arranged on both sides of the second anti-collision bar.

[0010] Furthermore, one side of the push block is inclined.

[0011] Furthermore, the two push blocks are located within the hollow center of the second anti-collision bar and move within it, pressing the two ends of the pull rod when they move.

[0012] Furthermore, two movable rods are symmetrically arranged at one end of the second anti-collision rod, and two movable slots are symmetrically opened on both sides of the top of the mounting groove, and the movable rods are slidably connected in the movable slots.

[0013] Furthermore, a groove is provided on one side of the bottom of the second anti-collision bar for the movement of the second roller.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The first and second anti-collision bars are cross-hinged, forming a flexible buffer structure in conjunction with the tension of the elastic component. When the battery body is impacted, the bars disperse the force through rotation, and the elastic component stretches to absorb kinetic energy, transforming the hard impact into elastic cushioning and reducing the possibility of direct compression and deformation of the battery body. The cross-hinged bars can transfer local impact force to the surrounding areas (rather than concentrating it on a single battery), and with the sliding of the rollers, the force is further dispersed throughout the entire battery pack, reducing the risk of single-point overload.

[0015] 2. When the first and second anti-collision bars are compressed and rotated, the pull rod is stretched and lengthened, and the deformation of the tension spring increases accordingly, thus increasing the tension force. This dynamic response characteristic of "the greater the impact force, the stronger the resistance to tension" can accurately match impacts of different intensities. In the case of minor impacts, the tension force is moderate to avoid excessive tension; in the case of high-intensity impacts, the tension force increases rapidly, which can more effectively offset the impact force and prevent the battery body from deforming due to excessive force.

[0016] 3. When the impact intensity is weak, the tension of the spring alone can offset the impact force, achieving flexible buffering. However, when the impact intensity is high, the push block actively intervenes. As the first and second anti-collision bars rotate to a specific angle, the top of the push block squeezes the pull rod, causing the spring to bear an additional upward compressive lateral force on top of its tension. This dual force of tension and compression can instantly improve the energy absorption efficiency of the spring, quickly offset high-intensity impact forces, and avoid damage to the battery body caused by the inadequacy of a single buffering mechanism. It has the effect of graded response to adapt to different impact intensities. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the overall appearance of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the outer shell of the present invention; Figure 3 This is a schematic diagram of the alignment groove of the present invention; Figure 4 This is a schematic diagram of the installation structure of the anti-collision component of the present invention; Figure 5 This is an exploded view of the anti-collision component and battery body of the present invention; Figure 6 This is a schematic diagram of the overall structure of the anti-collision unit of the present invention; Figure 7 This is an exploded structural diagram of the anti-collision unit of the present invention; Figure 8 This is a schematic diagram of the overall structure of the second anti-collision bar of the present invention after a half-section view; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point A in the middle.

[0018] In the picture: 1. Outer shell; 2. Battery body; 3. Anti-collision component; 31. Mounting slot; 32. Alignment slot; 33. First anti-collision bar; 34. Second anti-collision bar; 35. First roller; 36. Second roller; 37. Moving rod; 38. Moving slot; 4. Elastic component; 41. Pull rod; 42. Fixing rod; 43. Tension spring; 44. Storage slot; 45. Card slot; 5. Anti-collision performance enhancement component; 51. Limiting slot; 52. Pushing block; 6. Groove. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Example 1

[0021] Reference Figures 1-9 This is the first embodiment of the present invention, providing a high-safety, impact-resistant lithium battery pack, including a housing 1, a plurality of battery bodies 2 installed inside the housing 1, and anti-collision units symmetrically installed on one side of the battery bodies 2; the anti-collision units include anti-collision components 3 installed on one side of the battery bodies 2, and anti-collision performance enhancement components 5 installed within the anti-collision components 3; the anti-collision performance enhancement components 5 are used to improve the anti-collision performance between the battery bodies 2, avoiding damage to the battery bodies 2 from high-intensity impacts; the anti-collision components 3 include a mounting groove 31 opened on one side of the battery bodies 2, and an alignment point opened on the other side of the battery bodies 2 at a corresponding position to the mounting groove 31. The system includes a groove 32, a first anti-collision rod 33 hinged to the bottom of the mounting groove 31, a second anti-collision rod 34 hinged to the middle of the first anti-collision rod 33, the middle of the second anti-collision rod 34 being hollow, a first roller 35 rotatably connected to one end of the first anti-collision rod 33, and second rollers 36 symmetrically rotatably connected to both ends of the second anti-collision rod 34. The first roller 35 and one of the second rollers 36 are slidably connected in the alignment groove 32, and the other second roller 36 is slidably connected in the mounting groove 31. An elastic component 4 is installed in the middle of the first anti-collision rod 33 and the second anti-collision rod 34. The elastic component 4 is used to provide tension between the first anti-collision rod 33 and the second anti-collision rod 34.

[0022] Specifically, during installation, the battery body 2 is aligned with the first anti-collision bar 33 and the second anti-collision bar 34 in the alignment groove 32 and placed from top to bottom. After several battery bodies 2 are placed, the first anti-collision bar 33 and the second anti-collision bar 34 are squeezed by the alignment groove 32, causing them to rotate around the central hinge. The elastic component 4 is stretched, which stretches the first anti-collision bar 33 and the second anti-collision bar 34. Under the joint pushing action of several anti-collision components 3, several battery bodies 2 are stably set inside the outer shell 1. When the battery body 2 is impacted, due to inertia, several battery bodies 2 will move inside the outer shell 1. The first anti-collision bar 33 and the second anti-collision bar 34 will be squeezed and rotate. At this time, the first roller 35 and the second roller 36 roll to both sides in the alignment groove 32 at the same time. The setting of the first roller 35 and the second roller 36 reduces the friction of the first anti-collision bar 33 and the second anti-collision bar 34 when they rotate when the battery body 2 is squeezed by the impact force. The first anti-collision bar 33 and the second anti-collision bar 34 are cross-hinged, and the elastic component 4 is provided therein to provide tension. When the battery body 2 is subjected to impact, the impact force between the battery bodies 2 is reduced, the impact force is absorbed, and the battery body 2 is prevented from being rigidly squeezed and deformed when it directly and rigidly contacts the other battery body, thereby preventing safety accidents. This improves the safety and service life of the battery pack during use.

[0023] The first anti-collision bar 33 and the second anti-collision bar 34 are cross-hinged, forming a flexible buffer structure in conjunction with the tension of the elastic component 4. When the battery body 2 is impacted, the bars disperse the force through rotation, and the elastic component 4 stretches to absorb kinetic energy, transforming the hard impact into elastic buffering and reducing the possibility of direct compression deformation of the battery body 2. The cross-hinged bars can transmit the local impact force to the surroundings (rather than concentrating it on a single battery), and with the sliding of the rollers, the force is further dispersed to the entire battery pack, reducing the risk of single-point overload. During installation of the battery body 2, the first anti-collision bar 33 and the second anti-collision bar 34 are pressed by the alignment groove 32, and the elastic component 4 is stretched to generate continuous tension, pushing multiple battery bodies 2 to stick together and be stably fixed inside the outer casing 1, avoiding loosening due to gaps after installation. One of the core safety hazards of lithium batteries is structural deformation caused by hard impacts (such as cracking of the outer casing 1 and short circuit of internal electrodes), which can lead to accidents such as fire and explosion. Therefore, the anti-collision component 3 can effectively ensure the safety and durability of the lithium battery pack during use, while also taking into account ease of installation and adaptability to different scenarios, providing an effective solution for the application of high-safety lithium batteries. Furthermore, compared to the traditional method of using anti-collision pads between the battery bodies 2, the anti-collision component 3 not only improves the anti-collision buffering performance but also enhances heat dissipation while ensuring its secure installation.

[0024] Reference Figures 6-7The elastic component 4 includes a pull rod 41 movably connected to one side of the middle of the second anti-collision bar 34, a fixing rod 42 fixedly connected to one side of the middle of the first anti-collision bar 33, a tension spring 43 sleeved on the pull rod 41 and the fixing rod 42, and a storage groove 44 opened on the side of the first anti-collision bar 33 facing the tension spring 43.

[0025] Specifically, when the first anti-collision bar 33 and the second anti-collision bar 34 are squeezed and rotated, the pull rod 41 is stretched and lengthened, and its tension increases, making the force resisted by the first anti-collision bar 33 and the second anti-collision bar 34 greater, thereby resisting the impact force on the battery body 2. The storage groove 44 provides movement space for the tension spring 43, allowing the first anti-collision bar 33 and the second anti-collision bar 34 to rotate at a larger angle, further improving the anti-collision performance. When the first anti-collision bar 33 and the second anti-collision bar 34 are squeezed and rotated, the pull rod 41 is stretched and lengthened, and the deformation degree of the tension spring 43 increases accordingly, and the tension increases synchronously. This dynamic response characteristic of "the greater the impact force, the stronger the resistance to tension" can accurately match impacts of different intensities. In the case of a slight impact, the tension is moderate to avoid excessive tension; in the case of a high-intensity impact, the tension increases rapidly, which can more effectively offset the impact force and prevent the battery body 2 from deforming due to excessive force.

[0026] Reference Figure 9 The middle part of the pull rod 41 is provided with a slot 45 for the tension spring 43 to engage and pull.

[0027] Specifically, it is used to limit the position of the tension spring 43, prevent the tension spring 43 from shifting its position when pulled, and improve the stability of the tension spring 43 during tensile elongation.

[0028] Example 2

[0029] Reference Figure 6 , Figure 7 and Figure 9 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the anti-collision performance enhancement component 5 includes a limiting groove 51 opened on one side of the middle part of the second anti-collision rod 34, a pull rod 41 is slidably connected in the limiting groove 51, and push blocks 52 are symmetrically fixedly connected on both sides of the second anti-collision rod 34.

[0030] Specifically, when the impact on the battery body 2 is not strong, the increased tension of the spring 43 during stretching is sufficient to offset the impact force between the battery bodies 2. However, if the impact is strong, the stretching speed of the spring 43 is insufficient to quickly and effectively offset the high-intensity impact. Therefore, when the impact is strong, as the first anti-collision bar 33 and the second anti-collision bar 34 rotate to a certain angle, the top of the push block 52 will press against the push rod 41. Since the other end of the spring 43 is limited by the fixing rod 42, at this time, while the spring 43 is being stretched, one end of it will also be pushed upward by the push block 52. When the impact is weak, the stretching force of the spring 43 alone is sufficient to offset the impact, achieving flexible buffering. However, when the impact is strong (the stretching speed of the spring 43 is insufficient to absorb energy quickly), the push block 52 actively intervenes. As the first anti-collision bar 33 and the second anti-collision bar 34 rotate to a specific angle, the top of the push block 52 presses against the push rod 41, causing the spring 43 to bear an additional upward compressive lateral force on top of the stretching. This dual force of tension and compression can instantly improve the energy absorption efficiency of the tension spring 43, quickly offset high-intensity impact, and avoid damage to the battery body 2 caused by the inadequacy of a single buffer mechanism. It has the effect of graded response to adapt to different impact intensities.

[0031] Compared to the single mode that relies solely on the tension spring 43, the dual force allows for full deformation of the tension spring 43, resulting in a stepwise increase in energy absorption efficiency. This converts more impact kinetic energy into elastic potential energy, significantly enhancing resistance to extreme impacts. Furthermore, it features a zero-delay linkage characteristic. When the impact intensity exceeds the threshold of the tension spring 43's single buffering capability, the push block 52 directly compresses the pull rod 41 the instant the anti-collision bar rotates to a specific angle. No additional triggering mechanism is required, achieving an instantaneous response that intervenes rapidly once the impact intensity reaches the threshold. This ensures that the buffering force can be increased in the shortest possible time under high-intensity impacts, reducing the transfer of impact energy to the battery body 2.

[0032] Reference Figure 9 The side of the push block 52 is tilted gently.

[0033] Specifically, the design of the longer and more gently sloping push block 52 allows it to continuously push the pull rod 41 as the impact intensity increases, continuously increasing the tension of the tension spring 43 and continuously improving the anti-collision buffering performance. Furthermore, after the impact force is buffered, the first anti-collision rod 33 and the second anti-collision rod 34 return to their original rotation. The push block 52 does not affect the return of the tension spring 43, allowing it to return quickly and with high sensitivity, thus preparing for the next possible impact force.

[0034] Reference Figure 6 and Figure 9The two push blocks 52 are located in the hollow middle part of the second anti-collision bar 34 and move, and when the two push blocks 52 move, they squeeze the two ends of the pull rod 41.

[0035] Specifically, this design avoids interference with the tension spring 43 when the push block 52 rotates, while allowing continuous compression of the push rod 41.

[0036] Reference Figure 5 and Figure 6 Two movable rods 37 are symmetrically fixedly connected to one end of the second anti-collision rod 34. Two movable slots 38 are symmetrically opened on both sides of the top of the mounting slot 31, and the movable rods 37 are slidably connected in the movable slots 38.

[0037] Specifically, when the second anti-collision bar 34 rotates, one of the second rollers 36 moves upward in the mounting groove 31, and the moving rod 37 moves to a limited position in the moving groove 38, providing support force for the tension spring 43 and enhancing the stability of the tension spring 43 during the tensioning process.

[0038] Reference Figure 6 and Figure 7 The second anti-collision bar 34 also has a groove 6 on one side of its bottom for the second roller 36 to move.

[0039] Specifically, the design of the groove 6 can increase the rotation angle of the second anti-collision bar 34, thereby improving its anti-collision performance. The rest of the structure is the same as that in Embodiment 1.

[0040] Based on embodiments 1-2, the working principle of this invention is as follows: The lithium battery pack achieves impact protection through a multi-level anti-collision structure. During installation, the first anti-collision bar 33 and the second anti-collision bar 34 of the battery body 2 are squeezed by the alignment groove 32 and rotate around the central hinge point. The tension spring 43 of the elastic component 4 is stretched, generating a continuous tensile force. Combined with the roller limit, this ensures that multiple battery packs are stably fitted inside the outer casing 1. When impacted, the inertial movement of the battery body 2 triggers the anti-collision component 3 to work. The cross-hinged anti-collision bars rotate, and the force is dispersed by the sliding of the first roller 35 and the second roller 36 in the mounting groove 31 and the alignment groove 32, reducing friction. The tension spring 43 of the elastic component 4 dynamically increases the tensile force as the pull rod 41 is stretched, and the receiving groove 44 expands the rotation angle to achieve flexible buffering. In the case of low-intensity impact, the tension spring 43 alone can offset the impact force; in the case of high-intensity impact, the anti-collision performance enhancement component 5 intervenes, and the push block 52 rotates with the anti-collision bar to squeeze the pull rod 41, so that the tension spring 43 is simultaneously stretched and laterally squeezed, and the dual force quickly improves the energy absorption efficiency.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-safety anti-impact lithium battery pack, comprising a shell (1), a plurality of battery bodies (2) arranged in the shell (1), characterized in that: The anti-collision unit is symmetrically arranged on one side of the battery body (2); The anti-collision unit comprises an anti-collision assembly (3) arranged on one side of the battery body (2), and an anti-collision performance improving assembly (5) arranged in the anti-collision assembly (3); the anti-collision assembly (3) comprises a mounting groove (31) opened on one side of the battery body (2), a positioning groove (32) opened on the other side of the battery body (2) and corresponding to the mounting groove (31), a first anti-collision rod (33) arranged at the bottom of the mounting groove (31), a second anti-collision rod (34) arranged at the middle part of the first anti-collision rod (33), the middle part of the second anti-collision rod (34) being in a hollow state, a first roller (35) arranged at one end of the first anti-collision rod (33), a second roller (36) symmetrically arranged at two ends of the second anti-collision rod (34), and the first roller (35) and one of the second rollers (36) are slidingly connected in the positioning groove (32), the other second roller (36) is slidingly connected in the mounting groove (31), and an elastic assembly (4) arranged at the middle part of the first anti-collision rod (33) and the second anti-collision rod (34) is arranged, and the elastic assembly (4) is used to provide tension between the first anti-collision rod (33) and the second anti-collision rod (34).

2. The high safety anti-impact lithium battery pack of claim 1, wherein: The elastic assembly (4) comprises a pull rod (41) arranged on one side of the middle part of the second anti-collision rod (34), a fixed rod (42) arranged on one side of the middle part of the first anti-collision rod (33), a tension spring (43) arranged on the pull rod (41) and the fixed rod (42), and a receiving groove (44) opened on one side of the first anti-collision rod (33) facing the tension spring (43).

3. The high safety anti-collision lithium battery pack of claim 2, wherein: The middle part of the pull rod (41) is provided with a clamping groove (45) for clamping and pulling the tension spring (43).

4. The high safety anti-collision lithium battery pack of claim 1, wherein: The anti-collision performance improving assembly (5) comprises a limiting groove (51) opened on one side of the middle part of the second anti-collision rod (34), and the pull rod (41) is slidingly connected in the limiting groove (51), and a pushing block (52) symmetrically arranged on the two sides of the second anti-collision rod (34).

5. The high safety anti-collision lithium battery pack of claim 4, wherein: One side of the pushing block (52) is in a long and gentle inclined state.

6. The high safety anti-collision lithium battery pack of claim 5, wherein: The two pushing blocks (52) are movably arranged in the hollow middle part of the second anti-collision rod (34), and when the two pushing blocks (52) move, the two ends of the pull rod (41) are pressed.

7. The high safety anti-collision lithium battery pack of claim 1, wherein: Two moving rods (37) are symmetrically arranged at one end of the second anti-collision rod (34), and two moving grooves (38) are symmetrically opened at the top of the mounting groove (31), and the moving rod (37) is slidingly connected in the moving groove (38).

8. The high safety anti-collision lithium battery pack of claim 1, wherein: A recess (6) is opened at one side of the bottom of the second anti-collision rod (34) for the movement of the second roller (36).

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