Battery ejection device and vehicle

Abstract

The utility model provides a battery pop-up device and a vehicle, and relates to the technical field of batteries. The battery pop-up device comprises an elastic piece, a separating device and a tension sensor, the tension sensor is used for detecting tension of the elastic piece, one end of the elastic piece is used for being connected with a vehicle body floor, the other end of the elastic piece is connected with the separating device, and the separating device is used for being connected with a battery pack. When the battery pack is in a fixed state, the elastic piece is in a compressed state, after the battery pack pops up downwards, the elastic piece is in a stretched state, and the separating device is used for separating the elastic piece from the battery pack when the elastic piece is in the stretched state and the tensile force of the elastic piece reaches a preset tensile force value. The battery pack to be separated can be popped out through the elastic piece, the elastic piece can pull the battery pack when in the stretching state, battery explosion caused by collision is avoided, then the elastic piece and the battery pack are separated through the separating device, and damage of the battery pack to a vehicle is prevented.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery ejection device and a vehicle. Background Technology

[0002] New energy vehicles (such as electric vehicles, plug-in hybrid electric vehicles, and range-extended electric vehicles) typically use different types of batteries to provide power. Commonly used battery types include lithium iron phosphate batteries and ternary lithium batteries. Different battery types have their own advantages and disadvantages based on energy density, safety, cost, and application scenarios. For example, lithium iron phosphate batteries are safer, cheaper, and have a longer lifespan, but have lower energy density and poorer low-temperature performance. Ternary lithium batteries, on the other hand, have very high energy density, can provide a longer driving range, and have relatively better low-temperature performance, but have higher cost and lower safety.

[0003] Lithium iron phosphate (LFP) batteries are safer in the event of battery malfunctions (such as spontaneous combustion, puncture, and impact), exhibit better thermal stability, and have a relatively lower risk of spontaneous combustion. Ternary lithium batteries, on the other hand, are more prone to internal short circuits under impact or external shocks, leading to a rapid increase in battery temperature and potentially causing spontaneous combustion or explosion. However, regardless of whether a new energy vehicle uses LFP or ternary lithium batteries, both are currently susceptible to spontaneous combustion or explosion after being punctured or subjected to impact or pressure. Therefore, it is necessary to promptly remove faulty batteries to prevent damage to other batteries or even the entire vehicle. Utility Model Content

[0004] The problem this invention addresses is how to reduce losses when batteries experience malfunctions such as spontaneous combustion.

[0005] To solve the above problems, this utility model provides a battery ejection device and a vehicle.

[0006] In a first aspect, the present invention provides a battery ejection device, including an elastic element, a separation device and a tension sensor, wherein the tension sensor is used to detect the tension of the elastic element, one end of the elastic element is used to connect to the vehicle floor, and the other end of the elastic element is connected to the separation device, and the separation device is used to connect to the battery pack;

[0007] When the battery pack is in a fixed state, the elastic element is in a compressed state. When the battery pack pops out downwards, the elastic element is in a stretched state. The separation device is used to separate the elastic element from the battery pack when the elastic element is in a stretched state and the tension of the elastic element reaches a preset tension value.

[0008] Optionally, the separation device includes a first separation device and a second separation device that are detachably connected, wherein the first separation device is connected to the elastic element and the second separation device is connected to the battery pack;

[0009] When the elastic element is in a compressed state, or when the elastic element is in a stretched state but the tension of the elastic element is less than a preset tension value, the first separation device and the second separation device are connected; when the elastic element is in a stretched state and the tension of the elastic element reaches the preset tension value, the first separation device and the second separation device are separated.

[0010] Optionally, the first separation device includes a slider connected to the elastic member, and the second separation device includes a limiting pin and a power device for fixing to the battery pack. The limiting pin is connected to the drive end of the power device, and the power device is used to drive the limiting pin to move in a preset direction, which is perpendicular to the extension and retraction direction of the elastic member.

[0011] When the elastic element is in a compressed state, or when the elastic element is in a stretched state but the tension of the elastic element is less than a preset tension value, the power device drives the limiting pin to move to limit the relative position between the slider and the battery pack; when the elastic element is in a stretched state and the tension of the elastic element reaches the preset tension value, the power device drives the limiting pin to separate from the slider.

[0012] Optionally, the power unit includes a push rod, a gear system, and a remote sensing motor. One end of the push rod is connected to the limiting pin, and the other end of the push rod is connected to the output shaft of the remote sensing motor through the gear system. The remote sensing motor is used to fix the push rod on the battery pack, and the output shaft of the remote sensing motor drives the push rod to move in the preset direction through the gear system.

[0013] Optionally, the upper surface of the battery pack is provided with a groove extending along the extension and retraction direction of the elastic member, and the side wall of the slider is provided with a limiting hole that cooperates with the limiting pin.

[0014] When the elastic element is in a compressed state, or when the elastic element is in a stretched state but the tension of the elastic element is less than the preset tension value, the slider is housed in the groove, and the power device drives the limiting pin to be inserted into the limiting hole; when the elastic element is in a stretched state and the tension of the elastic element reaches the preset tension value, the power device drives the limiting pin to disengage from the limiting hole.

[0015] Optionally, the first separation device and the second separation device are connected by magnetic force.

[0016] Optionally, there may be multiple battery ejection devices, which are evenly distributed on the vehicle floor.

[0017] Optionally, the elastic element includes a force damper for gradually releasing the elastic force of the elastic element as it pops downward.

[0018] Optionally, the battery ejection device further includes a separation status feedback device, which is used to provide real-time feedback on the separation status of the elastic element and the battery pack, and to trigger an alarm when the separation of the elastic element and the battery pack is abnormal.

[0019] Secondly, this utility model provides a vehicle including the aforementioned battery ejection device.

[0020] The beneficial effects of the battery ejection device of this utility model are as follows: the elastic element can eject the battery pack that needs to be separated. When the battery pack is ejected downwards to near the ground or in contact with the ground, the elastic element is in a stretched state, which can hold the battery pack and ensure its stability when it falls downwards, preventing the battery pack from violently colliding with the ground and avoiding battery explosion caused by violent collision. It can also prevent further damage to the less damaged battery pack. Then, when the tension of the elastic element reaches the preset tension value, the separation device separates the elastic element and the battery pack, preventing the faulty battery pack from damaging the vehicle. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the battery ejection device according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Mounting base, 2-Force sensor, 3-Vehicle floor, 4-Elastic element, 5-Slider, 6-Limit pin, 7-Push rod, 8-Remote sensing motor, 9-Battery pack. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0025] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0026] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] like Figure 1 As shown in the figure, a battery ejection device provided by this utility model includes an elastic element 4, a separation device and a tension sensor 2. The tension sensor 2 is used to detect the tension of the elastic element 4. One end of the elastic element 4 is used to connect to the vehicle floor 3, and the other end of the elastic element 4 is connected to the separation device. The separation device is used to connect to the battery pack 9.

[0028] When the battery pack 9 is in a fixed state, the elastic element 4 is in a compressed state. When the battery pack 9 pops down, the elastic element 4 is in a stretched state. The separation device is used to separate the elastic element 4 from the battery pack 9 when the elastic element 4 is in a stretched state and the tension of the elastic element 4 reaches a preset tension value.

[0029] Specifically, the battery ejection device includes an elastic element 4, a separation device, and a tension sensor 2. One end of the elastic element 4 is connected to the vehicle floor 3, and the other end is connected to the separation device, which is used to connect to the battery pack 9. When the battery pack 9 is in a fixed state, the elastic element 4 is in a compressed state. When the battery pack 9 malfunctions, the elastic element 4 ejects the battery pack 9. After the battery pack 9 is ejected downwards (e.g., close to or in contact with the ground), the elastic element 4 is in a stretched state, which can hold the battery pack 9 and prevent it from violently colliding with the ground when it falls downwards. When the tension sensor 2 detects that the tension of the elastic element 4 reaches a preset tension value (the preset tension value can be determined by calibrating the tension of the elastic element 4 when the battery pack 9 is close to the ground, and by adjusting the elastic coefficient and length of the elastic element 4 to meet the buffering requirements of different battery packs 9), the separation device separates the elastic element 4 and the battery pack 9 to prevent the battery pack 9 from damaging the vehicle.

[0030] One end of the elastic element 4 can be connected to the mounting base 1, and the mounting base 1 is fixed on the vehicle floor 3.

[0031] The tension sensor 2 can also monitor the stability of the battery pack 9. For example, if the battery pack 9 is not faulty, but the tension exceeds the preset range, it means that the battery pack 9 may be loose or the battery fixing device is not locked. The tension sensor 2 can trigger the alarm system to remind the user or automatically implement safety measures, such as controlling the battery fixing device to lock to fix the battery pack 9.

[0032] In this embodiment, the elastic element 4 can eject the battery pack 9 that needs to be separated. When the battery pack 9 is ejected downwards to near the ground or in contact with the ground, the elastic element 4 is in a stretched state, which can hold the battery pack 9 and ensure its stability when it falls downwards, preventing the battery pack 9 from colliding violently with the ground and avoiding battery explosion caused by violent collision. It can also prevent further damage to the less damaged battery pack 9. Then, when the tension of the elastic element 4 reaches the preset tension value, the separation device separates the elastic element 4 and the battery pack 9 to prevent the faulty battery pack 9 from damaging the vehicle.

[0033] Optionally, the separation device includes a first separation device and a second separation device that can be detachably connected, the first separation device being connected to the elastic member 4, and the second separation device being connected to the battery pack 9;

[0034] When the elastic element 4 is in a compressed state, or when the elastic element 4 is in a stretched state but the tension of the elastic element 4 is less than a preset tension value, the first separation device and the second separation device are connected; when the elastic element 4 is in a stretched state and the tension of the elastic element 4 reaches the preset tension value, the first separation device and the second separation device are separated.

[0035] Specifically, the separation device includes a first separation device and a second separation device that can be detachably connected. The first separation device is connected to the elastic element 4, and the second separation device is connected to the battery pack 9. When the elastic element 4 is in a compressed state, or when the elastic element 4 is in a stretched state but the tension of the elastic element 4 is less than a preset tension value, the first separation device and the second separation device are connected. When the elastic element 4 is in a stretched state and the tension of the elastic element 4 reaches the preset tension value, the first separation device and the second separation device are separated, thereby realizing the separation of the elastic element 4 and the battery pack 9 and preventing the battery pack 9 from causing damage to the vehicle.

[0036] In this optional embodiment, the elastic element 4 and the battery pack 9 are separated by the first separation device and the second separation device to prevent the battery pack 9 from damaging the vehicle.

[0037] Optionally, the first separation device includes a slider 5 connected to the elastic member 4, and the second separation device includes a limiting pin 6 and a power device for fixing to the battery pack 9. The limiting pin 6 is connected to the drive end of the power device, and the power device is used to drive the limiting pin to move in a preset direction, which is perpendicular to the extension and retraction direction of the elastic member 4.

[0038] When the elastic element 4 is in a compressed state, or when the elastic element 4 is in a stretched state but the tension of the elastic element 4 is less than a preset tension value, the power device drives the limiting pin 6 to move to limit the relative position between the slider 5 and the battery pack 9; when the elastic element 4 is in a stretched state and the tension of the elastic element 4 reaches the preset tension value, the power device drives the limiting pin 6 to separate from the slider 5.

[0039] Specifically, in combination Figure 1 As shown, the first separation device includes a slider 5 connected to the elastic member 4, and the second separation device includes a limiting pin 6 and a power device for fixing it to the battery pack 9. The driving end of the power device drives the limiting pin to move in a preset direction (perpendicular to the extension and retraction direction of the elastic member 4). When the elastic member 4 is in a compressed state, or when the elastic member 4 is in a stretched state but the tension of the elastic member 4 is less than the preset tension value, the power device drives the limiting pin 6 to move to limit the relative position between the slider 5 and the battery pack 9. This can avoid excessive friction between the slider 5 and the battery pack 9 when the elastic member 4 is in a compressed state, reducing damage to the structure of the battery pack 9. It can also hold the battery pack 9 when the elastic member 4 is in a stretched state but the tension of the elastic member 4 is less than the preset tension value, preventing the battery pack 9 from violently colliding with the ground. When the elastic member 4 is in a stretched state and the tension of the elastic member 4 reaches the preset tension value, the power device drives the limiting pin 6 to separate from the slider 5, and the first separation device and the second separation device separate, thereby realizing the separation of the elastic member 4 and the battery pack 9 and preventing the faulty battery pack 9 from causing damage to the vehicle.

[0040] In this optional embodiment, the cooperation between the slider 5 and the limiting pin 6 avoids excessive displacement or unnecessary damage to the battery pack, and enables the smooth separation of the first separation device and the second separation device.

[0041] Optionally, the power unit includes a push rod 7, a gear system, and a remote sensing motor 8. One end of the push rod 7 is connected to the limiting pin 6, and the other end of the push rod 7 is connected to the output shaft of the remote sensing motor 8 through the gear system. The remote sensing motor 8 is used to fix the battery pack 9, and the output shaft of the remote sensing motor 8 drives the push rod 7 to move along the preset direction through the gear system.

[0042] Specifically, in combination Figure 1As shown, the power unit includes a push rod 7, a gear system, and a remote sensing motor 8 (fixed on the battery pack 9). The two ends of the push rod 7 are connected to the limit pin 6 and the remote sensing motor 8 respectively (for example, connected to the output shaft of the remote sensing motor 8 through the gear system). When the battery pack 9 malfunctions, the remote sensing motor 8 can drive the push rod 7 to move in a preset direction through the gear system, automatically triggering the action of the push rod 7, causing the limit pin 6 to move out of the slide. Through precise motion control, the battery pack 9 can be smoothly ejected, thereby achieving rapid separation of the battery pack 9. The precise control of the remote sensing motor 8 combined with the push rod 7 makes the separation process of the battery pack 9 safer and more reliable. Through the push of the push rod 7, the limit pin 6 is effectively controlled, and the ejection process of the battery pack can be precisely limited to avoid damage to the battery pack 9 caused by excessive pressure or impact.

[0043] The form in which the remote sensing motor 8 drives the push rod 7 can be as follows: the remote sensing motor 8 drives the rotor to rotate through the current inside, and the rotational motion of the rotor is transmitted to the gear system through the output shaft of the motor. The gear is connected to the output shaft of the motor, and the rack is a linear component arranged along a certain trajectory. The gear converts the rotational motion into linear translational motion by meshing with the rack. That is, when the remote sensing motor 8 rotates, the gear connected to the output shaft of the motor starts to rotate. The tooth surface of the gear meshes with the tooth surface of the rack. The rotation of the gear drives the rack to make translational motion along its fixed track. The translation of the rack acts on the limit pin 6 through the push rod 7. The limit pin 6 moves along the slide (or its predetermined trajectory) during the translation of the rack through the connection with the rack.

[0044] In this optional embodiment, the push rod 7 is controlled by the remote sensing motor 8, which enables precise linear drive and ensures the translational sliding of the limit pin 6 and the smooth separation of the battery pack 9.

[0045] Optionally, the upper surface of the battery pack 9 is provided with a groove extending along the extension and retraction direction of the elastic member 4, and the side wall of the slider 5 is provided with a limiting hole that cooperates with the limiting pin 6.

[0046] When the elastic element 4 is in a compressed state, or when the elastic element 4 is in a stretched state but the tension of the elastic element 4 is less than the preset tension value, the slider 5 is housed in the groove, and the power device drives the limiting pin 6 to be inserted into the limiting hole; when the elastic element 4 is in a stretched state and the tension of the elastic element 4 reaches the preset tension value, the power device drives the limiting pin 6 to disengage from the limiting hole.

[0047] Specifically, the upper surface of the battery pack 9 is provided with a groove extending along the extension and retraction direction of the elastic member 4, and the side wall of the slider 5 is provided with a limiting hole that cooperates with the limiting pin 6. When the elastic member 4 is in a compressed state, or when the elastic member 4 is in a stretched state but the tension of the elastic member 4 is less than the preset tension value, the slider 5 is housed in the groove, and the power device drives the limiting pin 6 to be inserted into the limiting hole to limit the relative position between the slider 5 and the battery pack 9, thereby effectively limiting the relative position between the slider 5 and the battery pack 9, avoiding friction between the battery pack 9 and the elastic member 4, and preventing the battery pack 9 from violently colliding with the ground when it pops out; when the elastic member 4 is in a stretched state and the tension of the elastic member 4 reaches the preset tension value, the power device drives the limiting pin 6 to disengage from the limiting hole, and the first separation device and the second separation device separate, thereby realizing the separation of the elastic member 4 and the battery pack 9, and preventing the faulty battery pack 9 from causing damage to the vehicle.

[0048] In this optional embodiment, the cooperation between the slider 5 and the limiting pin 6 avoids excessive displacement or unnecessary damage to the battery pack, and enables the smooth separation of the first separation device and the second separation device.

[0049] Optionally, the first separation device and the second separation device are connected by magnetic force.

[0050] Specifically, unlike the mechanical connection structure in the above embodiments, in this embodiment, the first separation device and the second separation device are connected by magnetic force. Magnetic connection is a non-contact connection method. Compared with traditional mechanical connection, it does not require complex mechanical parts for connection and fixation. Therefore, magnetic connection can greatly simplify the structure of the device, reduce the number and complexity of mechanical parts, and thus reduce the difficulty of manufacturing and maintenance. In addition, since magnetic connection does not rely on traditional physical contact parts, there is almost no friction or wear during the operation of the separation device. The long-term use of the system will not affect its performance or require frequent maintenance due to component wear, thereby improving the durability and reliability of the device. By adjusting the strength of the magnetic force, the connection and separation between the two parts can be precisely controlled. The strength of the magnetic force can be adjusted according to actual needs to ensure that the separation device can be triggered quickly and accurately when the battery pack 9 fails, for example, by disconnecting the power supply to the magnetic system to separate the first separation device and the second separation device.

[0051] In this optional embodiment, by setting the first separation device and the second separation device to be magnetically connected, a simpler, more reliable and precise separation process can be achieved. This not only reduces the use of traditional mechanical parts and improves the durability and response speed of the device, but also provides higher safety and reduces energy consumption.

[0052] Optionally, there are multiple battery ejection devices, which are evenly distributed on the vehicle floor 3.

[0053] Specifically, each battery pack 9 is equipped with multiple battery ejection devices, which are evenly distributed on the vehicle floor 3. This allows the battery pack 9 to eject more smoothly in case of a malfunction, ensuring that each elastic element 4 applies force evenly during the separation process, preventing the battery pack 9 from tilting during ejection and reducing instability during separation. When the battery pack 9 malfunctions, the multiple separation devices can work together, serving as redundant backups, reducing the risk of the battery pack 9 failing to eject properly due to the failure of a single separation device.

[0054] In this optional embodiment, by providing multiple battery ejection devices, the stability, efficiency, and safety of battery pack 9 separation are improved, and the redundancy and adaptability of the system are also enhanced.

[0055] Optionally, the elastic element 4 includes a spring force buffer, which is used to gradually release the elastic force of the elastic element 4 when the elastic element 4 pops downward.

[0056] Specifically, the elastic element 4 includes a spring buffer, such as an adjustable damper. When the elastic element 4 pops down, the spring buffer can gradually release the elastic force of the elastic element 4 to avoid instantaneous impact, making the separation process of the battery pack 9 more gentle and smooth.

[0057] In this optional embodiment, by providing an elastic element including an elastic damper, the elastic force of the elastic element can be gradually released to avoid instantaneous impact, making the battery pack separation process more gentle and smooth.

[0058] Optionally, the battery ejection device further includes a separation status feedback device, which is used to provide real-time feedback on the separation status of the elastic element 4 and the battery pack 9, and to trigger an alarm when the separation of the elastic element 4 and the battery pack 9 is abnormal.

[0059] Specifically, the battery ejection device also includes a separation status feedback device. As a status sensor, the separation status feedback device can provide real-time feedback on the separation status of the elastic element 4 and the battery pack 9. If an abnormal separation action is detected (such as jamming or incomplete separation), it indicates a separation abnormality and triggers an alarm to remind the user to handle it in time.

[0060] In this optional embodiment, by setting a separation status feedback device, the separation status of the elastic element 4 and the battery pack 9 can be fed back in real time, and an alarm can be triggered when the separation of the elastic element 4 and the battery pack 9 is abnormal, thereby improving the safety of the separation process.

[0061] This utility model embodiment also provides a vehicle including the above-described battery ejection device.

[0062] The principle of the battery ejection device is as follows:

[0063] When the battery pack 9 malfunctions, the control elastic element 4 will eject the battery pack 9;

[0064] When the tension sensor 2 detects that the tension of the elastic element 4 reaches the preset tension value, it controls the separation device to separate the elastic element 4 from the battery pack 9.

[0065] Specifically, when the battery pack 9 malfunctions, the vehicle controller can remove the force applied to the elastic element 4 (e.g., open the locking device of the elastic element 4), release the elastic element 4, and eject the battery pack 9 through the elastic force of the elastic element 4. When the tension sensor 2 detects that the tension of the elastic element 4 reaches the preset tension value, the vehicle controller can send a command to the separation device, such as a command to the remote sensing motor 8. The remote sensing motor 8 triggers the action of the push rod 7, causing the limit pin 6 to move out of the slide, thereby realizing the rapid separation of the battery pack 9.

[0066] The beneficial effects of this embodiment are the same as those of the battery ejection device described above, and will not be repeated here.

[0067] Optionally, each of the four corners of the battery pack 9 is provided with a battery ejection device, and when the tension sensor 2 detects that the tension of the elastic member 4 reaches a preset tension value, controlling the separation device to separate the elastic member 4 from the battery pack 9 includes:

[0068] When the tension of the elastic element 4 in any of the battery ejection devices reaches a preset tension value, the separation device is controlled to separate the elastic element 4 from the battery pack 9.

[0069] Specifically, when the tension of the elastic element 4 in any battery ejection device reaches the preset tension value, the separation device is controlled to separate the elastic element 4 from the battery pack 9. The elastic elements 4 at the four corners are triggered synchronously when the tension reaches the preset value, ensuring that the force at each corner is relatively balanced during the ejection process, effectively preventing the battery pack 9 from tilting or getting stuck due to uneven force, and ensuring that the battery pack 9 separates smoothly and stably.

[0070] The beneficial effects of this embodiment are the same as those of the battery ejection device described above, and will not be repeated here.

[0071] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A battery ejection device, characterized in that, It includes an elastic element (4), a separation device and a tension sensor (2), the tension sensor (2) is used to detect the tension of the elastic element (4), one end of the elastic element (4) is used to connect to the vehicle floor (3), and the other end of the elastic element (4) is connected to the separation device, the separation device is used to connect to the battery pack (9); When the battery pack (9) is in a fixed state, the elastic element (4) is in a compressed state. When the battery pack (9) pops down, the elastic element (4) is in a stretched state. The separation device is used to separate the elastic element (4) from the battery pack (9) when the elastic element (4) is in a stretched state and the tension of the elastic element (4) reaches a preset tension value.

2. The battery ejection device according to claim 1, characterized in that, The separation device includes a first separation device and a second separation device that can be detachably connected. The first separation device is connected to the elastic element (4), and the second separation device is connected to the battery pack (9). When the elastic element (4) is in a compressed state, or when the elastic element (4) is in a stretched state but the tension of the elastic element (4) is less than the preset tension value, the first separation device and the second separation device are connected; when the elastic element (4) is in a stretched state and the tension of the elastic element (4) reaches the preset tension value, the first separation device and the second separation device are separated.

3. The battery ejection device according to claim 2, characterized in that, The first separation device includes a slider (5) connected to the elastic member (4), and the second separation device includes a limiting pin (6) and a power device for fixing on the battery pack (9). The limiting pin (6) is connected to the drive end of the power device, and the power device is used to drive the limiting pin to move in a preset direction, which is perpendicular to the extension and retraction direction of the elastic member (4). When the elastic element (4) is in a compressed state, or when the elastic element (4) is in a stretched state but the tension of the elastic element (4) is less than the preset tension value, the power device drives the limiting pin (6) to move to limit the relative position between the slider (5) and the battery pack (9); when the elastic element (4) is in a stretched state and the tension of the elastic element (4) reaches the preset tension value, the power device drives the limiting pin (6) to separate from the slider (5).

4. The battery ejection device according to claim 3, characterized in that, The power unit includes a push rod (7), a gear system and a remote sensing motor (8). One end of the push rod (7) is connected to the limiting pin (6), and the other end of the push rod (7) is connected to the output shaft of the remote sensing motor (8) through the gear system. The remote sensing motor (8) is used to fix the battery pack (9). The output shaft of the remote sensing motor (8) drives the push rod (7) to move along the preset direction through the gear system.

5. The battery ejection device according to claim 3, characterized in that, The upper surface of the battery pack (9) is provided with a groove extending along the extension direction of the elastic member (4), and the side wall of the slider (5) is provided with a limiting hole that cooperates with the limiting pin (6). When the elastic element (4) is in a compressed state, or when the elastic element (4) is in a stretched state but the tension of the elastic element (4) is less than the preset tension value, the slider (5) is housed in the groove, and the power device drives the limiting pin (6) to be inserted into the limiting hole; when the elastic element (4) is in a stretched state and the tension of the elastic element (4) reaches the preset tension value, the power device drives the limiting pin (6) to disengage from the limiting hole.

6. The battery ejection device according to claim 2, characterized in that, The first separation device and the second separation device are connected by magnetic force.

7. The battery ejection device according to claim 1, characterized in that, The number of battery ejection devices is multiple, and the multiple battery ejection devices are evenly distributed on the vehicle floor (3).

8. The battery ejection device according to claim 1, characterized in that, The elastic element (4) includes a spring force damper, which is used to gradually release the elastic force of the elastic element (4) as the elastic element (4) pops downward.

9. The battery ejection device according to claim 1, characterized in that, It also includes a separation status feedback device, which is used to provide real-time feedback on the separation status of the elastic element (4) and the battery pack (9), and to trigger an alarm when the separation of the elastic element (4) and the battery pack (9) is abnormal.

10. A vehicle, characterized in that, Includes the battery ejection device according to any one of claims 1 to 9.

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