Low-speed vehicle battery pack structure with protection structure

Abstract

The invention discloses a low-speed vehicle battery pack structure with a protection structure, and relates to the technical field of battery pack manufacturing, the low-speed vehicle battery pack structure comprises a battery pack frame, a battery module, a support and a cover plate, the battery pack frame is fixed at the bottom of the cover plate through a plurality of bolts, and an accommodating space for placing the battery module is arranged in the battery pack frame; the height size of the containing space is larger than that of the battery module, the support is fixedly arranged at the bottom of the battery pack frame and is in sliding connection with the battery module, and protection mechanisms are arranged on the two sides of the battery pack frame and used for preventing the battery module from being damaged after being impacted by the outside world. Through the design of spring buffering and dispersing acting force and active displacement of the battery module after collision, the effects of passive energy absorption and active displacement avoiding are combined, the safety under the collision condition is improved, multiple protection on the battery module is formed, and the deformation resistance of the whole frame is effectively enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack manufacturing, and in particular to a low-speed vehicle battery pack structure with a protective structure. Background Art

[0002] With the popularization of new energy technologies in the vehicle field, the number of low-speed electric vehicles continues to increase. The battery pack is the core component of the electric vehicle and mainly provides the power source for the electric vehicle. The battery pack must have a certain collision protection capability to reduce or even avoid damage to the battery caused by external impact, thereby ensuring safety during use. In the existing technology, the collision protection device of the battery pack will undergo significant deformation after suffering a severe impact, which makes it difficult to protect the battery pack and poses a safety hazard.

[0003] For example, the patent with authorization announcement number CN115241586B describes a battery pack protective structure and a vehicle. The above scheme reduces the probability of direct damage to the battery pack by fixing the anti-collision frame to the bottom of the vehicle frame, arranging a fixing bracket at the bottom of the anti-collision frame, and fixing the battery pack on the fixing bracket. However, the scheme only relies on the anti-collision frame and the anti-collision box structure, so that when the collision is large, the degree of force dispersion will be affected, and the impact force cannot be effectively dispersed, so that the battery pack is still damaged by severe vibration, posing a safety hazard.

[0004] Based on this, a low-speed vehicle battery pack structure with a protective structure is now provided to eliminate the disadvantages of the existing technical solutions. Summary of the Invention

[0005] The purpose of the present invention is to provide a low-speed vehicle battery pack structure with a protective structure to solve the problem in the background art that only relying on the anti-collision frame and the anti-collision box structure cannot effectively disperse the impact force.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A low-speed vehicle battery pack structure with a protective structure includes a battery pack frame, battery modules, a bracket, and a cover plate. The battery pack frame is fixed to the bottom of the cover plate by a plurality of bolts. The battery pack frame is provided with a storage space for accommodating the battery module. The height of the storage space is greater than the height of the battery module. The bracket is fixedly provided at the bottom of the battery pack frame and is slidably connected to the battery module. Protective mechanisms are provided on both sides of the battery pack frame to prevent damage to the battery module caused by external impact.

[0008] The protection mechanism includes several placement plates fixedly mounted on the battery pack frame, a baffle is provided on the side of the placement plate away from the battery module, an airbag is fixedly provided on the other side of the baffle, the baffle and the placement plate are connected by an anti-collision component for dispersing the impact force, and pushing components are provided on the upper and lower sides of the anti-collision component for driving the battery module to move toward the side away from the impact force.

[0009] Preferably, the anti-collision component includes a placement slot opened inside the placement plate, a buffer block is provided inside the placement slot, a movable rod is movably inserted and connected at the middle of both ends of the buffer block, and the two movable rods are connected by a tension spring, the other side of the movable rod is fixedly connected with a movable block, and the two opposite sides of the movable blocks are movably inserted and connected with a stabilizing column, damping material is provided inside the movable block, one end of the stabilizing column is fixedly connected to the side wall of the placement slot, and a rotating rod is rotatably provided on the side of the movable block close to the baffle, and the other end of the rotating rod is rotatably connected to the baffle.

[0010] Preferably, the pushing assembly includes a push plate arranged inside the accommodating space, a sliding rod is fixedly installed between the push plate and the baffle, mounting plates are symmetrically arranged on the upper and lower sides of the placement plate, the mounting plate is fixedly installed on the battery pack frame, the sliding rod is slidably connected to the mounting plate, a first spring is sleeved on the sliding rod located between the mounting plate and the baffle, and a rubber pad is provided on the push plate.

[0011] Preferably, a sliding assembly that cooperates with the pushing assembly is provided at the bottom of the battery module, and the sliding assembly includes a plurality of first slide grooves and second slide grooves opened on the surface of the bracket, a first slider is provided for sliding inside the first slide groove, and a second slider is provided for sliding inside the second slide groove, the cross-sections of the first slider and the second slider are both set to inverted T shapes, and the top ends thereof are fixedly connected to the battery module, a fixed block is fixedly provided at the bottom of the bracket, and a damper is provided between the fixed block and the first slider.

[0012] Preferably, a plurality of reinforcing plates are symmetrically installed on both sides of the battery pack frame, and the reinforcing plates are fixedly arranged in the short side direction of the battery pack frame.

[0013] Preferably, a protrusion is fixedly provided on the top of the cover plate, a ventilation channel is opened inside the protrusion, and the other end of the ventilation channel is connected to the accommodating space.

[0014] Preferably, the outer contour of the airbag is set to be arc-shaped.

[0015] Preferably, the movable block is connected to the side wall of the placement groove via a second spring, and the second spring is sleeved on the outside of the stabilizing column.

[0016] Preferably, the width of the push plate is smaller than the distance between the two brackets.

[0017] Preferably, the pushing assembly further comprises guide rods symmetrically arranged on both sides of the slide rod, the guide rods are fixedly connected to the baffle, and the other ends of the guide rods pass through the mounting plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a low-speed vehicle battery pack structure with a protective structure. Through the spring buffering and dispersing force and the active displacement design of the battery module after the collision, the passive energy absorption and the active displacement avoidance effects are combined to improve the safety in the event of a collision and form multiple protections for the battery module. The impact energy is absorbed by the spring and damping materials to reduce the force directly transmitted to the battery module. When the anti-collision component reaches the maximum protection limit, the battery module is pushed away from the impact point to avoid secondary damage. A ventilation channel is provided on the top of the cover plate to effectively utilize natural wind to reduce the operating temperature of the battery module, which can extend the battery life and improve safety. A reinforcing plate and an inverted T-shaped slider are provided to effectively enhance the deformation resistance of the overall frame. At the same time, the battery module cooperates with the damper to ensure that the battery module is stable and controllable during movement, effectively reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of one side of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the other side of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the battery pack frame and battery module of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the battery pack frame and bracket of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the battery module and the protection mechanism of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the anti-collision component of the present invention.

[0026] Figure 7 Schematic diagram of the internal structure of the anti-collision component of the present invention.

[0027] Figure 8 It is a structural schematic diagram of the sliding assembly of the present invention.

[0028] Figure 9 It is a cross-sectional view of the present invention.

[0029] Notes on figure marks: battery pack frame 101, battery module 102, bracket 103, cover plate 104, reinforcement plate 105, protrusion 106, ventilation channel 107, protective mechanism 200, placement plate 201, baffle 202, airbag 203, placement groove 204, buffer block 205, movable rod 206, tension spring 207, movable block 208, stabilizing column 209, rotating rod 210, push plate 211, slide bar 212, mounting plate 213, first spring 214, first slider 215, second slider 216, fixed block 217, damper 218, second spring 219, guide rod 220. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0031] In this embodiment, if Figures 1-9 As shown, the low-speed vehicle battery pack structure with a protective structure includes a battery pack frame 101, a battery module 102, a bracket 103 and a cover plate 104. The bracket 103 is made of high-strength aluminum alloy and has a low-friction coefficient coating on the surface, such as PTFE, to reduce sliding resistance, ensure that the battery module 102 can slide smoothly when impacted, and reduce wear caused by long-term use. The battery pack frame 101 is fixed to the bottom of the cover plate 104 by a number of bolts. The cover plate 104 and the battery pack frame 101 and other components can be installed inside the low-speed vehicle through the bolts. The bolts adopt an anti-loosening design such as a spring washer to ensure that the vehicle The battery pack frame 101 is provided with a storage space for the battery module 102. The height of the storage space is greater than the height of the battery module 102, and a buffer space is reserved to prevent the battery module 102 from making hard contact with the frame when the vehicle is bumpy, thereby reducing the risk of internal damage and avoiding direct extrusion. The bracket 103 is fixedly provided at the bottom of the battery pack frame 101 and is slidably connected to the battery module 102. Protective mechanisms 200 are provided on both sides of the battery pack frame 101 to prevent the battery module 102 from being damaged by external impact.

[0032] The protection mechanism 200 includes a plurality of placement plates 201 fixedly mounted on the battery pack frame 101. A baffle 202 is provided on one side of the placement plate 201 away from the battery module 102. An airbag 203 is fixedly provided on the other side of the baffle 202. The airbag 203 is arranged in the long direction of the battery pack frame 101, and the long direction is set as the impact direction of the impact force. The baffle 202 and the placement plate 201 are connected by an anti-collision component to disperse the impact force. The upper and lower sides of the anti-collision component are provided with a push component to drive the battery module 102 to move toward the side away from the impact force.

[0033] Among them Figure 2-Figure 7 As shown, the anti-collision component includes a placement groove 204 opened inside the placement plate 201, and a buffer block 205 is provided inside the placement groove 204. The buffer block 205 and the movable block 208 are both slidably connected to the inner wall of the placement groove 204. The middle parts of both ends of the buffer block 205 are movably connected with a movable rod 206. The movable rod 206 and the buffer block 205 are relatively displaced. The tension spring 207 and the damping material cooperate to consume energy. The stabilizing column 209 limits the displacement range. The two movable rods 206 are connected by the tension spring 207. The tension spring 207 has a pulling force on the two movable rods 205 to move inward, so that the movable rod 206 has the ability to automatically return to its original position. The other side of the movable rod 206 is fixedly connected with a movable block 208. The two movable blocks 206 are fixedly connected to the movable block 208. 08 are movably interspersed with stabilizing columns 209 on the opposite sides, and the interior of the movable block 208 is provided with damping material. The damping material can be selected from honeycomb or porous materials according to actual needs. The energy dissipation efficiency is enhanced through the pore structure, and the impact force is dispersed through the tension spring 207 and the damping material to avoid stress concentration. One end of the stabilizing column 209 is fixedly connected to the side wall of the placement groove 204, and the movable block 208 is rotatably provided with a rotating rod 210 on the side close to the baffle 202. The other end of the rotating rod 210 is rotatably connected to the baffle 202. The two ends of the rotating rod 210 are rotatably connected to the baffle 202 and the movable block 208 to realize force transmission. The rotating rod 210 enables the airbag 203 to shrink inward when it is hit, and then move closer to the placement plate 201;

[0034] Among them Figure 2-Figure 7 As shown, the pushing assembly includes a push plate 211 arranged inside the accommodating space, a slide bar 212 is fixedly installed between the push plate 211 and the baffle 202, and mounting plates 213 are symmetrically arranged on the upper and lower sides of the placement plate 201. The mounting plate 213 is fixedly installed on the battery pack frame 101, and the slide bar 212 is slidably connected to the mounting plate 213. A first spring 214 is sleeved on the slide bar 212 located between the mounting plate 213 and the baffle 202. When the anti-collision assembly disperses the impact force to the maximum extent, the baffle 202 will move and compress the first spring 214, and the slide bar 212 drives the push plate 211 to push the battery module 102 to slide, so that the battery module 102 will actively avoid the impact point to reduce secondary damage. A rubber pad is provided on the push plate 211 to avoid damage to the outer wall of the battery module 102 when pushing the battery module 102;

[0035] Among them Figure 2-Figure 7As shown, the bottom of the battery module 102 is provided with a sliding component that cooperates with the pushing component to convert the impact force into the translational kinetic energy of the battery module 102. The sliding component includes a plurality of first slide grooves and a second slide groove opened on the surface of the bracket 103. The slide groove provides a sliding space for the battery module 102, so that the push plate 211 can push the battery module 102 to the side away from the impact force, which is convenient for timely adjustment of the position of the battery module 102 and increases the overall use effect. The internal sliding of the first slide groove is provided with a first slider 215, and the internal sliding of the second slide groove is provided with a first slider 216. A second slider 216 is provided. The cross-sections of the first slider 215 and the second slider 216 are both inverted T-shaped, and their top ends are fixedly connected to the battery module 102. A fixing block 217 is fixedly provided at the bottom of the bracket 103. A damper 218 is provided between the fixing block 217 and the first slider 215. The damper 218 is conventional and can be a hydraulic damper filled with a high-viscosity fluid to ensure long-term stability. The damping coefficient is 200 N·s / m and the reset time is 3 to 5 seconds. This prevents the battery module 102 from rebounding too quickly and slows down the movement speed.

[0036] Among them Figures 1-4 As shown, a number of reinforcing plates 105 are symmetrically installed on both sides of the battery pack frame 101. The reinforcing plates 105 are fixedly arranged in the short side direction of the battery pack frame 101 to enhance the anti-deformation ability of the battery pack frame 101 and improve the overall safety. The reinforcing plates 105 can provide additional support in the short side direction and disperse the force on the frame;

[0037] Among them Figure 1 and Figure 9 As shown, a protrusion 106 is fixedly provided on the top of the cover plate 104, and a ventilation channel 107 is opened inside the protrusion 106. The other end of the ventilation channel 107 is connected to the accommodating space. Natural wind is transported to the interior of the accommodating space through the ventilation channel 107, thereby reducing the battery temperature, extending the battery life, and reducing the active heat dissipation cost. Water outlets are provided on both sides of the ventilation channel 107, and a guide block is provided between the corresponding water outlets to prevent liquid from staying in the ventilation channel 107 for a long time and affecting the subsequent use of the battery module 102. A filter can be provided at the air inlet of the ventilation channel 107 to prevent debris or insects from entering;

[0038] Among them Figure 1-Figure 3 As shown, the outer contour of the airbag 203 is set to an arc shape. The airbag 203 is made of puncture-resistant rubber. An inflation port can be provided on one side to adjust the internal pressure. The airbag (203) is made of puncture-resistant rubber material. When the structure is hit, the airbag 203 at the outer end protects the battery pack frame 101. When hit, the airbag 203 deforms to absorb the initial impact. The arc structure can disperse the impact force. The baffle 202 transmits the remaining force to the anti-collision component, reducing the force transmitted to the baffle 202, thereby playing a protective role.

[0039] Among them Figure 6 and Figure 7 As shown, the movable block 208 is connected to the side wall of the placement groove 204 by a second spring 219. The second spring 219 is sleeved on the outside of the stabilizing column 209. The second spring 219 enables the movable block 208 to automatically return to its original position. When a collision occurs, the airbag 203 moves closer to the placement plate 201, so that the rotating rod 210 drives the movable block 208 to move to both sides, so that the second spring 219 is squeezed and displaced, thereby buffering and dispersing the force, thereby improving the overall anti-collision effect.

[0040] Among them Figure 2 and Figure 5 As shown, the width of the push plate 211 is smaller than the distance between the two brackets 103, ensuring that the push plate 211 can move freely and avoid interference with the brackets 103;

[0041] Among them Figure 5 As shown, the push assembly further includes guide rods 220 symmetrically arranged on both sides of the slide rod 212. The guide rods 220 are fixedly connected to the baffle 202, and the other ends of the guide rods 220 pass through the mounting plate 213 to increase the stability of the structure.

[0042] During use, the external impact force acts on the baffle 202 and the airbag 203. The airbag 203 absorbs part of the energy by deformation, and the baffle 202 transmits the remaining force to the anti-collision component. The movable rod 206 and the buffer block 205 are relatively displaced under the action of the tension spring 207 and the damping material, dispersing the impact force to the stabilizing column 209 and the second spring 219 to avoid local stress concentration. The baffle 202 moves to push the sliding rod 212, compressing the first spring 214 and driving the push plate 211 to make the battery module 102 slide along the slide groove direction. The damper 218 slows down the movement speed to prevent severe vibration. The external air enters the accommodation space through the ventilation channel 107 of the protrusion 106, using natural wind to assist in cooling. After the impact is over, the tension spring 207, the second spring 219 and the damper 218 work together to push the movable block 208 and the baffle 202 back to their original position. The battery module 102 slowly returns to its initial position under the control of the damper 218, which is convenient for the next use.

[0043] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A low-speed vehicle battery pack structure with a protective structure, comprising a battery pack frame (101), a battery module (102), a bracket (103) and a cover plate (104), wherein the battery pack frame (101) is fixed to the bottom of the cover plate (104) by a plurality of bolts, an accommodating space for accommodating the battery module (102) is provided inside the battery pack frame (101), and the height dimension of the accommodating space is greater than the height dimension of the battery module (102), and the bracket (103) is fixedly provided at the bottom of the battery pack frame (101) and is slidably connected to the battery module (102), characterized in that: Protection mechanisms (200) are provided on both sides of the battery pack frame (101) to prevent the battery module (102) from being damaged by external impact; The protection mechanism (200) comprises a plurality of placement plates (201) fixedly mounted on a battery pack frame (101); a baffle (202) is provided on one side of the placement plate (201) away from the battery module (102); an airbag (203) is fixedly provided on the other side of the baffle (202); the baffle (202) and the placement plate (201) are connected via an anti-collision component for dispersing the impact force; and push components are provided on the upper and lower sides of the anti-collision component for driving the battery module (102) to move toward a side away from the impact force.

2. The low-speed vehicle battery pack structure with a protective structure according to claim 1, characterized in that: The anti-collision component comprises a placement groove (204) provided inside the placement plate (201), a buffer block (205) is provided inside the placement groove (204), a movable rod (206) is movably inserted and connected in the middle of both ends of the buffer block (205), and the two movable rods (206) are connected by a tension spring (207), a movable block (208) is fixedly connected on the other side of the movable rod (206), and a stabilizing column (209) is movably inserted and connected on the opposite sides of the two movable blocks (208), a damping material is provided inside the movable block (208), one end of the stabilizing column (209) is fixedly connected to the side wall of the placement groove (204), a rotating rod (210) is rotatably provided on the side of the movable block (208) close to the baffle (202), and the other end of the rotating rod (210) is rotatably connected to the baffle (202).

3. The low-speed vehicle battery pack structure with a protective structure according to claim 1, characterized in that: The pushing assembly includes a push plate (211) arranged inside the accommodating space, a slide bar (212) is fixedly installed between the push plate (211) and the baffle (202), mounting plates (213) are symmetrically arranged on the upper and lower sides of the placement plate (201), the mounting plate (213) is fixedly installed on the battery pack frame (101), the slide bar (212) is slidably connected to the mounting plate (213), a first spring (214) is sleeved on the slide bar (212) located between the mounting plate (213) and the baffle (202), and a rubber pad is provided on the push plate (211).

4. The low-speed vehicle battery pack structure with a protective structure according to claim 3, characterized in that: The bottom of the battery module (102) is provided with a sliding assembly that cooperates with the pushing assembly. The sliding assembly includes a plurality of first sliding grooves and second sliding grooves opened on the surface of the bracket (103). A first slider (215) is provided inside the first sliding groove for sliding, and a second slider (216) is provided inside the second sliding groove for sliding. The cross-sections of the first slider (215) and the second slider (216) are both set to be inverted T-shaped, and their top ends are fixedly connected to the battery module (102). A fixed block (217) is fixedly provided at the bottom of the bracket (103), and a damper (218) is provided between the fixed block (217) and the first slider (215).

5. The low-speed vehicle battery pack structure with a protective structure according to claim 1, characterized in that: A plurality of reinforcing plates (105) are symmetrically mounted on both sides of the battery pack frame (101), and the reinforcing plates (105) are fixedly arranged in the short side direction of the battery pack frame (101).

6. The low-speed vehicle battery pack structure with a protective structure according to claim 1, characterized in that: A protrusion (106) is fixedly provided on the top of the cover plate (104), a ventilation channel (107) is provided inside the protrusion (106), and the other end of the ventilation channel (107) is connected to the accommodating space.

7. The low-speed vehicle battery pack structure with a protective structure according to claim 1, characterized in that: The outer contour of the airbag (203) is set to be an arc shape.

8. The low-speed vehicle battery pack structure with a protective structure according to claim 2, characterized in that: The movable block (208) is connected to the side wall of the placement groove (204) via a second spring (219), and the second spring (219) is sleeved on the outside of the stabilizing column (209).

9. The low-speed vehicle battery pack structure with a protective structure according to claim 3, characterized in that: The width of the push plate (211) is smaller than the distance between the two brackets (103).

10. The low-speed vehicle battery pack structure with a protective structure according to claim 3, characterized in that: The push assembly further includes guide rods (220) symmetrically arranged on both sides of the slide rod (212), the guide rods (220) are fixedly connected to the baffle (202), and the other ends of the guide rods (220) pass through the mounting plate (213).

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