Battery pack protection device and vehicle

Abstract

The utility model provides a battery pack protection device and a vehicle. The battery pack protection device comprises a base, a movable connecting part and a protection shell, and the base is fixed with a vehicle body. And the movable connecting part is connected below the base. The protective shell is used for accommodating a battery pack of a vehicle. And the movable connecting part has a locking state and a loosening state. And the movable connecting part is connected with the protective shell in the locking state. And the movable connecting part is separated from the protective shell in the relaxed state. According to the battery pack protection device and the vehicle, the safety performance can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery pack protection technology, and in particular to a battery pack protection device and vehicle. Background Technology

[0002] As a crucial component of new energy vehicles, the power battery pack directly impacts their functionality and performance. During daily use, the power battery pack gradually generates heat. When the heat generation is low, it does not pose a safety risk. However, in the event of sudden thermal runaway, such as an internal short circuit or an impact triggering thermal runaway, the battery pack can catch fire, thereby compromising vehicle safety.

[0003] Therefore, it is necessary to provide an improved battery pack protection device and vehicle to solve the above problems. Utility Model Content

[0004] This application provides a battery pack protection device and vehicle that improves safety performance.

[0005] This application discloses a battery pack protection device, including a base, a movable connecting part, and a protective shell. The base is fixed to the vehicle body, the movable connecting part is connected to the lower part of the base, and the protective shell is used to accommodate the vehicle's battery pack. The movable connecting part has a locked state and a relaxed state. In the locked state, the movable connecting part is connected to the protective shell, and in the relaxed state, the movable connecting part is separated from the protective shell.

[0006] Furthermore, one of the movable connecting part and the protective shell is provided with an electromagnet, and the other of the movable connecting part and the protective shell is made of a magnetic material; in the locked state, the electromagnet is energized to realize the magnetic connection between the movable connecting part and the protective shell.

[0007] Furthermore, the movable connecting part includes at least one pair of clamping rods. In the locked state, the clamping rods clamp the side wall of the protective shell, thereby connecting the movable connecting part to the protective shell.

[0008] Furthermore, the base is provided with a slide rail extending laterally, and the top of the clamping rod is located inside the slide rail and can slide along the slide rail to realize the switching of the movable connecting part between the locked state and the relaxed state.

[0009] Furthermore, the movable connecting part also includes a connecting seat and a lifting rod, with both ends of the lifting rod connected to the connecting seat and the base, and the top end of the clamping rod connected to the connecting seat.

[0010] Furthermore, the protective shell has a groove or a through hole on its side wall, and the clamping rod has a bent part at its bottom, which extends into the groove or the through hole.

[0011] Furthermore, the protective shell is provided with a pressure relief port, and the pressure relief port is covered with a movable cover plate, which is magnetically attracted or elastically connected to the protective shell.

[0012] Furthermore, the protective shell is provided with ventilation openings; a heat dissipation device is provided inside the protective shell.

[0013] This application also discloses a vehicle including a battery pack and a battery pack protection device as described above, wherein the battery pack is located within the protective housing.

[0014] Furthermore, it also includes a control device, on which a temperature sensor and a vibration sensor connected to the control device are provided.

[0015] The battery pack protection device and vehicle of this application are provided by setting a base fixed to the vehicle body and a protective shell for accommodating the battery pack, and a movable connecting part connected to the base. The movable connecting part has a locked state and a relaxed state. When the battery pack is in normal working condition, the movable connecting part is connected to the protective shell to connect the battery pack to the vehicle body; when the battery pack experiences thermal runaway, the movable connecting part separates from the protective shell, thereby separating the battery pack from the vehicle body, reducing the damage to the vehicle body and passengers caused by battery pack thermal runaway, and improving driving safety.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0018] Figure 1 This is a schematic diagram of an embodiment of the battery pack protection device of this application.

[0019] Figure 2 This is a schematic diagram of another embodiment of the battery pack protection device of this application.

[0020] Figure 3 This is a schematic diagram of yet another embodiment of the battery pack protection device of this application.

[0021] Explanation of icon numbers:

[0022] 10. Base; 11. Slide rail; 20. Movable connecting part; 21. Electromagnet; 22. Clamping rod; 221. Bending part; 23. Connecting seat; 24. Lifting rod; 30. Protective shell; 301. Side wall; 302. Top wall; 31. Groove; 32. Through hole; 33. Pressure relief port; 34. Ventilation port; 35. Heat dissipation device; 40. Movable cover plate. Detailed Implementation

[0023] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0024] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0025] The embodiments of this application will now be described in detail.

[0026] like Figure 1 As shown, this application provides a battery pack protection device, including a base 10, a movable connecting part 20, and a protective shell 30. The base 10 is fixed to the vehicle body, the movable connecting part 20 is connected to the lower part of the base 10, and the protective shell 30 is used to house the vehicle's battery pack.

[0027] The movable connection 20 has a locked state and a relaxed state. When the battery pack is working normally, the movable connection 20 is in the locked state. In the locked state, the movable connection 20 is connected to the protective shell 30 to secure the vehicle body and the battery pack. When the battery pack experiences thermal runaway, the movable connection 20 is in the relaxed state. In the relaxed state, the movable connection 20 separates from the protective shell 30 to separate the vehicle body from the battery pack, reducing the damage to the vehicle body and passengers caused by battery pack thermal runaway and improving driving safety.

[0028] The movable connection part 20 can be connected to the protective shell 30 in various ways. For example... Figure 1As shown, one of the movable connecting part 20 and the protective shell 30 is equipped with an electromagnet 21, and the other of the movable connecting part 20 and the protective shell 30 is made of a magnetic material. In the locked state, the electromagnet 21 is energized to generate a magnetic field, attracting the magnetic material, thereby achieving a magnetic connection between the movable connecting part 20 and the protective shell 30. In the relaxed state, the electromagnet 21 is de-energized, the attraction between the electromagnet 21 and the magnetic material disappears, and the movable connecting part 20 is separated from the protective shell 30.

[0029] Figure 1 In the illustrated embodiment, the base 10 is located at the bottom of the vehicle body and fixed to the vehicle chassis, and the top of the movable connecting part 20 is fixed to the base 10. An electromagnet 21 is provided at the bottom of the movable connecting part 20, and the top wall 302 of the protective shell 30 is made of magnetic material. In the locked state, the bottom of the movable connecting part 20 is attracted to the top wall 302 of the protective shell 30, fixing the battery pack to the bottom of the vehicle body.

[0030] like Figure 2 and Figure 3 As shown, the movable connecting part 20 includes at least a pair of opposing clamping rods 22. In the locked state, the clamping rods 22 clamp the side wall 301 of the protective shell 30, thereby connecting the movable connecting part 20 to the protective shell 30. In the released state, the clamping rods 22 release the protective shell 30, thereby separating the movable connecting part 20 from the protective shell 30.

[0031] Figure 2 In the embodiment shown, a slide rail 11 extending laterally is provided on the base 10, and the top of the clamping rod 22 is located inside the slide rail 11 and can slide along the slide rail 11 to realize the switching of the movable connection part 20 between the locked state and the relaxed state.

[0032] Specifically, the bottom of the clamping rod 22 is provided with a bent portion 221, and the side wall 301 of the protective shell 30 is provided with a groove 31. In the locked state, the clamping rod 22 is located relatively inward on the slide rail 11, and the bent portion 221 extends into the groove 31, realizing the engagement between the clamping rod 22 and the protective shell 30. The pair of clamping rods 22 cooperate to fix the battery pack under the vehicle body. When the movable connecting part 20 switches from the locked state to the relaxed state, the clamping rod 22 slides outward along the slide rail 11, and the bent portion 221 disengages from the groove 31, realizing the separation of the movable connecting part 20 from the protective shell 30, and separating the battery pack from the vehicle body. The sliding of the clamping rod 22 can be driven by a motor or an air pump.

[0033] Figure 3In the illustrated embodiment, the movable connecting part 20 further includes a connecting seat 23 and a lifting rod 24. The upper and lower ends of the lifting rod 24 are connected to the base 10 and the connecting seat 23, respectively. The top end of the clamping rod 22 is connected to the connecting seat 23 and can move laterally on the connecting seat 23 to switch the movable connecting part 20 between a locked state and a relaxed state. In some cases, a laterally extending slide (not shown in the figure) can be provided on the connecting seat 23, along which the clamping rod 22 slides.

[0034] Specifically, the bottom of the clamping rod 22 is provided with a bent portion 221, and the side wall 301 of the protective shell 30 is provided with a through hole 32. In the locked state, the clamping rod 22 is located in a relatively inward position, and the bent portion 221 extends into the through hole 32, realizing the engagement between the clamping rod 22 and the protective shell 30. The pair of clamping rods 22 cooperate to fix the battery pack under the vehicle body. When the movable connecting part 20 switches from the locked state to the relaxed state, the clamping rod 22 moves outward, the bent portion 221 disengages from the through hole 32, realizing the separation of the movable connecting part 20 from the protective shell 30, and separating the battery pack from the vehicle body.

[0035] In some cases, the clamping rod 22 can also be fixed to the outermost side of the connecting seat 23. The connecting seat 23 is configured as a telescopic structure, thereby driving the movement of the clamping rod 22. When the connecting seat 23 retracts laterally inward, the clamping rod 22 clamps the protective shell 30. When the connecting seat 23 extends laterally outward, the clamping rod 22 releases the protective shell 30.

[0036] The lifting rod 24 can extend and retract in the vertical direction, thereby raising and lowering the connecting seat 23 and the clamping rod 22. When the battery pack is in normal working condition, the lifting rod 24 can be retracted to a shorter length, bringing the protective shell 30 closer to the base 10, facilitating the connection between the battery pack and the vehicle body. When the battery pack experiences thermal runaway, the lifting rod 24 can be extended to a longer length, moving the protective shell 30 away from the base 10. This reduces the impact of the battery pack's heat on the vehicle body and shortens the distance between the protective shell 30 and the ground, reducing the travel distance of the protective shell 30 from the vehicle body and preventing the battery pack inside the protective shell 30 from being subjected to excessive impact force, which could lead to an explosion or other dangerous situations.

[0037] Furthermore, the protective shell 30 is provided with a pressure relief port 33, and a movable cover plate 40 is provided on the pressure relief port 33. The movable cover plate 40 is magnetically attracted or elastically connected to the protective shell 30. When the battery pack is in normal working condition, the movable cover plate 40 completely seals the pressure relief port 33 to prevent external impurities from entering the protective shell 30. When the battery pack temperature rises rapidly or thermal runaway occurs, the gas inside the protective shell 30 expands due to heat, resulting in an increase in air pressure inside the protective shell 30. The air pressure pushes open the movable cover plate 40 to delay the temperature rise of the battery pack. When the battery pack needs to be removed from the vehicle body, the configuration of the pressure relief port 33 provides a buffer time for the separation of the movable connection 20 and the protective shell 30, improving the reliability of the battery pack protection device.

[0038] Furthermore, the protective casing 30 is also provided with ventilation openings 34. The ventilation openings 34 can be selectively opened or opened in stages according to the battery temperature to improve airflow within the protective casing 30 and help dissipate heat. A heat dissipation device 35 is provided inside the protective casing 30. The heat dissipation device 35 may include components such as heat sinks, heat pipes, or fans to efficiently remove the heat generated by the battery pack.

[0039] This application also provides a vehicle including the battery pack protection device and battery pack as described above, the battery pack being located within the protective housing 30.

[0040] The vehicle also includes control units, and the battery pack is equipped with temperature and vibration sensors. The temperature sensors are used to monitor the temperature of the battery pack in real time. The vibration sensors are used to detect the vibration of the battery pack.

[0041] The control device is connected to a temperature sensor, a vibration sensor, and a battery pack protection device. When the temperature sensor detects that the battery pack temperature exceeds a set threshold, the control device can control the battery pack protection device to open the vent 34 or the heat dissipation device 35 to dissipate heat from the battery pack. When the battery pack temperature continues to rise, the control device can control the movable connection 20 to loosen the protective shell 30, thereby detaching the battery pack from the vehicle body.

[0042] The control device can obtain the vibration status of the battery pack from the vibration sensor and determine whether the battery pack has been impacted. When the battery pack is impacted, the control device can control the movable connection 20 to release the protective shell 30 and detach the battery pack from the vehicle body.

[0043] The battery pack protection device and vehicle of this application are provided with a base 10 fixed to the vehicle body and a protective shell 30 for accommodating the battery pack, and a movable connecting part 20 connected to the base 10. The movable connecting part 20 has a locked state and a relaxed state. When the battery pack is in normal working condition, the movable connecting part 20 is connected to the protective shell 30 to connect the battery pack to the vehicle body; when the battery pack experiences thermal runaway, the movable connecting part 20 separates from the protective shell 30, thereby separating the battery pack from the vehicle body, reducing the damage to the vehicle body and passengers caused by battery pack thermal runaway, and improving driving safety.

[0044] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery pack protection device, characterized in that, The device includes a base, a movable connecting part, and a protective shell. The base is fixed to the vehicle body, the movable connecting part is connected to the lower part of the base, and the protective shell is used to accommodate the vehicle's battery pack. The movable connecting part has a locked state and a relaxed state. In the locked state, the movable connecting part is connected to the protective shell, and in the relaxed state, the movable connecting part is separated from the protective shell.

2. The battery pack protection device according to claim 1, characterized in that, One of the movable connecting part and the protective shell is provided with an electromagnet, and the other of the movable connecting part and the protective shell is made of a magnetic material; in the locked state, the electromagnet is energized to achieve a magnetic connection between the movable connecting part and the protective shell.

3. The battery pack protection device according to claim 1, characterized in that, The movable connecting part includes at least one pair of clamping rods. In the locked state, the clamping rods clamp the side wall of the protective shell, thereby connecting the movable connecting part to the protective shell.

4. The battery pack protection device according to claim 3, characterized in that, The base is provided with a slide rail that extends laterally, and the top of the clamping rod is located inside the slide rail and can slide along the slide rail to realize the switching of the movable connecting part between the locked state and the relaxed state.

5. The battery pack protection device according to claim 3, characterized in that, The movable connecting part also includes a connecting seat and a lifting rod. The two ends of the lifting rod are connected to the connecting seat and the base, and the top end of the clamping rod is connected to the connecting seat.

6. The battery pack protection device according to claim 3, characterized in that, The protective shell has a groove or a through hole on its side wall, and the clamping rod has a bent part at its bottom, which extends into the groove or the through hole.

7. The battery pack protection device according to claim 1, characterized in that, The protective shell has a pressure relief port, and the pressure relief port is covered with a movable cover plate, which is magnetically attracted or elastically connected to the protective shell.

8. The battery pack protection device according to claim 1, characterized in that, The protective shell is also provided with ventilation openings; a heat dissipation device is provided inside the protective shell.

9. A vehicle, characterized in that, It includes a battery pack and a battery pack protection device as described in any one of claims 1-8, wherein the battery pack is located within the protective housing.

10. The vehicle according to claim 9, characterized in that, It also includes a control device, and the battery pack is equipped with a temperature sensor and a vibration sensor connected to the control device.

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