Battery pack, vehicle and battery pack separation method

Abstract

This invention provides a battery pack, a vehicle, and a method for separating the battery pack, relating to the field of battery technology. The battery pack of this invention includes a battery pack body and an elastic element. The battery pack body is connected to the vehicle body via the elastic element. When the battery pack body is in a fixed state, the elastic element is in a compressed state; when the battery pack body is ejected downwards, the elastic element is in a stretched state. The battery pack body includes a battery end locking device detachably connected to the elastic element. The battery end locking device is used to separate from the elastic element when the bottom of the battery pack body is subjected to friction, thereby separating the battery pack body from the vehicle body. This invention allows the battery pack body to be ejected via the elastic element. When the elastic element is in a stretched state, it can hold the battery pack body, preventing it from violently colliding with the ground. When the bottom of the battery pack body is subjected to friction, the battery end locking device separates from the elastic element, separating the battery pack body from the vehicle body and preventing damage to the vehicle body from the battery pack body.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a battery pack, a vehicle, and a method for separating the battery pack. 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, in the event of battery spontaneous combustion, the vehicle is often completely destroyed, potentially resulting in severe loss of life and property for the driver and passengers. Summary of the Invention

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

[0005] To address the above problems, the present invention provides a method for separating a battery pack, a vehicle, and the battery pack.

[0006] In a first aspect, the present invention provides a battery pack, including a battery pack body and an elastic member. The battery pack body is connected to a vehicle body through the elastic member. When the battery pack body is in a fixed state, the elastic member is in a compressed state. When the battery pack body pops down, the elastic member is in a stretched state.

[0007] The battery pack body includes a battery end latching device that is detachably connected to the elastic member. The battery end latching device is used to separate from the elastic member when the bottom of the battery pack body is subjected to friction, so as to separate the battery pack body from the vehicle body.

[0008] Optionally, the elastic element includes a first elastic element and a second elastic element arranged at intervals along the length of the vehicle, wherein the distance between the first elastic element and the front of the vehicle is less than the distance between the second elastic element and the front of the vehicle, and the tension of the first elastic element is greater than the tension of the second elastic element.

[0009] Optionally, the battery end latching device includes a first latching device and a second latching device disposed on the top of the battery pack body. The first latching device is detachably connected to the first elastic member, and the second latching device is detachably connected to the second elastic member.

[0010] Optionally, both the first and second snap-fit ​​devices are provided with snap-fit ​​openings, and both snap-fit ​​openings are oriented towards the front of the vehicle; one end of the first elastic member and one end of the second elastic member are both used for fixed connection with the vehicle body, the other end of the first elastic member is provided with a third snap-fit ​​device that matches the shape of the snap-fit ​​opening of the first snap-fit ​​device, and the other end of the second elastic member is provided with a fourth snap-fit ​​device that matches the shape of the snap-fit ​​opening of the second snap-fit ​​device.

[0011] Optionally, when the battery pack body is in a fixed state, the third latching device is housed in the slot of the first latching device, and the fourth latching device is housed in the slot of the second latching device.

[0012] When the battery pack body pops out and the bottom of the battery pack body is rubbed, the third locking device separates from the latch of the first locking device, and the fourth locking device separates from the latch of the second locking device.

[0013] Optionally, the number of the first elastic element and the second elastic element is at least two, and the number of the second elastic element is less than or equal to the number of the first elastic element;

[0014] And / or, the number of the first elastic elements is at least two, and the at least two first elastic elements and the second elastic elements are distributed in a triangular pattern.

[0015] Optionally, the battery pack further includes a connector, and the battery pack body can be detachably connected to the power supply interface and communication interface of the vehicle body via the connector.

[0016] Secondly, the present invention provides a vehicle including the aforementioned battery pack.

[0017] Thirdly, the present invention provides a battery pack separation method, applied to the aforementioned battery pack, the battery pack separation method comprising:

[0018] When the battery pack body is detected to be in a preset fault state, the elastic element of the battery pack is controlled to pop out the battery pack body;

[0019] When the bottom of the battery pack body is subjected to friction, the battery end locking device of the battery pack body separates from the elastic element, thereby separating the battery pack body from the vehicle body.

[0020] Optionally, the elastic element controlling the battery pack to eject the battery pack body includes:

[0021] Open the fixing device of the battery pack body to change the elastic element from a compressed state to a stretched state, and pop the battery pack body out of the vehicle body.

[0022] The beneficial effects of the battery pack of the present invention are as follows: the elastic element can eject the battery pack body that needs to be separated. When the battery pack body 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 body and prevent it from violently colliding with the ground when it falls downwards, thereby avoiding battery explosion caused by violent collision. It can also prevent further damage to the less damaged battery pack body. When the bottom of the battery pack body is subjected to friction, the battery end locking device separates from the elastic element, so that the battery pack body is separated from the vehicle body, preventing the battery pack body from damaging the vehicle body in the event of spontaneous combustion or other faults. It can reduce the loss in the event of spontaneous combustion or other faults of the battery. Compared with the prior art that uses airbags and other buffer devices to reduce the collision between the battery pack and the ground, the structure of the present invention is simpler and effectively reduces the cost of battery separation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the detachment of the battery pack according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the battery pack fixing according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the snap-fit ​​connection according to an embodiment of the present invention;

[0026] Figure 4 This is a top view of the battery pack according to an embodiment of the present invention. Figure 1 ;

[0027] Figure 5 This is a top view of the battery pack according to an embodiment of the present invention. Figure 2 ;

[0028] Figure 6 This is a front view schematic diagram of the battery pack according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Battery pack body, 2-Elastic component, 3-Vehicle body, 4-Connector, 10-Battery end latching device, 11-First latching device, 12-Second latching device, 21-First elastic component, 22-Second elastic component, 211-Third latching device, 221-Fourth latching device. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention 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 the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0032] 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 invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0033] It should be noted that the terms "a" and "a plurality of" used in this invention 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".

[0034] like Figure 1 As shown in the figure, an embodiment of the present invention provides a battery pack, including a battery pack body 1 and an elastic member 2. The battery pack body 1 is connected to a vehicle body 3 through the elastic member 2. When the battery pack body 1 is in a fixed state, the elastic member 2 is in a compressed state. When the battery pack body 1 pops down, the elastic member 2 is in a stretched state. The battery pack body 1 includes a battery end clamping device 10 that is detachably connected to the elastic member 2. The battery end clamping device 10 is used to separate from the elastic member 2 when the bottom of the battery pack body 1 is subjected to friction, so as to separate the battery pack body 1 from the vehicle body 3.

[0035] Specifically, the battery pack includes a battery pack body 1 and an elastic element 2. The battery pack body 1 is connected to the vehicle body 3 via the elastic element 2. The battery end locking device 10 of the battery pack body 1 and the elastic element 2 limit the battery pack body 1 (usually requiring the cooperation of a fixing device to fix the battery pack body 1). When the elastic element 2 is in a compressed state, the battery pack body 1 is in a fixed state. When separation is required (first, the fixing device opens, causing the battery pack body 1 to fall and the elastic element 2 to change from a compressed state to a stretched state), the battery pack body 1 is ejected by the elastic element 2. When the battery pack body 1 is ejected downwards to near the ground or in contact with the ground, the elastic element 2 is in a stretched state, which can hold the battery pack body 1 and prevent the battery pack body 1 from violently colliding with the ground when it falls downwards. When the bottom of the battery pack body 1 is subjected to friction, the battery end locking device 10 separates from the elastic element 2, causing the battery pack body 1 to separate from the vehicle body 3, preventing the battery pack body 1, which is in a preset fault state (such as puncture, overheating, severe impact, and spontaneous combustion), from causing damage to the vehicle body 3.

[0036] The tension of the elastic element 2 needs to be pre-calibrated to ensure that the bottom of the battery pack body 1 can generate friction with the ground when the elastic element 2 is fully stretched.

[0037] In this embodiment, the elastic element 2 can pop out the battery pack body 1 that needs to be separated. When the battery pack body 1 pops out downwards, the elastic element 2 is in a stretched state, which can hold the battery pack body 1 and prevent it from violently colliding with the ground when it falls downwards, thus avoiding battery explosion caused by the collision. It can also prevent further damage to the less damaged battery pack body 1. When the bottom of the battery pack body 1 is subjected to friction, the battery end locking device 10 separates from the elastic element 2, so that the battery pack body 1 separates from the vehicle body 3, preventing the battery pack body 1 from damaging the vehicle body 3. Compared with the use of cushioning devices such as airbags in the prior art, the structure of this embodiment is simpler and effectively reduces the cost of battery separation.

[0038] Optionally, the elastic element 2 includes a first elastic element 21 and a second elastic element 22 arranged at intervals along the length of the vehicle. The distance between the first elastic element 21 and the front of the vehicle is less than the distance between the second elastic element 22 and the front of the vehicle. The tension of the first elastic element 21 is greater than the tension of the second elastic element 22.

[0039] Specifically, in combination Figure 1 and Figure 2As shown, the elastic element 2 includes a first elastic element 21 and a second elastic element 22 arranged at intervals along the length of the vehicle. The distance between the first elastic element 21 and the front of the vehicle is less than the distance between the second elastic element 22 and the front of the vehicle. That is, the first elastic element 21 is positioned closer to the front of the vehicle than the second elastic element 22. The tension of the first elastic element 21 is greater than the tension of the second elastic element 22. When the battery pack body 1 falls downward, the second elastic element 22 is stretched longer, making the part of the battery pack body 1 near the rear of the vehicle lower and making contact with the ground earlier, which is conducive to the smooth landing of the battery pack body 1. If the part of the battery pack body 1 near the front lands first, the battery pack body 1 may roll forward because it still has forward momentum. Therefore, the tension of the first elastic element 21 is preferentially set to be greater than the tension of the second elastic element 22.

[0040] To ensure the battery does not roll over and lands smoothly after contacting the ground, the relative magnitudes of the tension of the first elastic element 21 and the tension of the second elastic element 22 can be adjusted so that the angle between the battery pack body 1 and the ground is 10° to 15°. This prevents the battery pack body 1 from rolling over due to excessive torque and reduces the contact impact force, effectively absorbing vibration. Taking an angle of 10° as an example, if the length of the battery pack body 1 is 1m, the maximum ground clearance when the battery pack body 1 makes contact with the ground is 0.17m. If the length of the battery pack body 1 is 0.2m, the maximum ground clearance when the battery pack body 1 makes contact with the ground is 0.034m, ensuring that the battery pack body 1 lands smoothly.

[0041] In this optional embodiment, by setting the tension of the first elastic member 21 to be greater than that of the second elastic member 22, when the battery pack body 1 falls downward, the part near the rear of the vehicle is lower and makes contact with the ground earlier, which is conducive to the stable landing of the battery pack body 1.

[0042] Optionally, the battery end latching device 10 includes a first latching device 11 and a second latching device 12 disposed on the top of the battery pack body 1. The first latching device 11 is detachably connected to the first elastic member 21, and the second latching device 12 is detachably connected to the second elastic member 22.

[0043] Specifically, such as Figure 1As shown, the battery end clamping device 10 includes a first clamping device 11 and a second clamping device 12 disposed on the top of the battery pack body 1. The first clamping device 11 and the second clamping device 12 are arranged at intervals along the length of the vehicle to avoid occupying more space in the width direction of the vehicle. When the vehicle is in normal driving, the first clamping device 11 and the second clamping device 12 can limit the battery pack body 1, which can effectively prevent the battery pack body 1 from relative displacement with the elastic member 2 under acceleration, deceleration or collision. Moreover, the vibration generated during vehicle driving will be more evenly distributed on the first clamping device 11 and the second clamping device 12, reducing structural fatigue caused by excessive force on a single part, thereby improving the installation stability of the battery pack body 1. When the battery pack body 1 falls downward, the first clamping device 11 and the second clamping device 12 cooperate with the elastic member 2 to ensure the stability of the battery pack body 1 when it falls downward.

[0044] In this optional embodiment, by setting the first locking device 11 and the second locking device 12, the battery pack body 1 can be limited when the vehicle is driving normally, and the stability of the battery pack body 1 when it falls downward can be guaranteed.

[0045] Optionally, both the first snap-fit ​​device 11 and the second snap-fit ​​device 12 are provided with snap-fit ​​openings, and both snap-fit ​​openings are positioned facing the front of the vehicle; one end of the first elastic member 21 and one end of the second elastic member 22 are both used for fixed connection with the vehicle body 3, the other end of the first elastic member 21 is provided with a third snap-fit ​​device 211 that matches the snap-fit ​​opening shape of the first snap-fit ​​device 11, and the other end of the second elastic member 22 is provided with a fourth snap-fit ​​device 221 that matches the snap-fit ​​opening shape of the second snap-fit ​​device 12.

[0046] Specifically, in combination Figure 3 As shown, both the first latching device 11 and the second latching device 12 are provided with latches, and the latches are both facing the front of the vehicle. One end of the first elastic member 21 and one end of the second elastic member 22 are used to fix them to the vehicle body 3. The other end of the first elastic member 21 is provided with a third latching device 211 that matches the shape of the latch of the first latching device 11, and the other end of the second elastic member 22 is provided with a fourth latching device 221 that matches the shape of the latch of the second latching device 12. When the bottom of the battery pack body 1 is rubbed by the ground, the third latching device 211 disengages from the latch of the first latching device 11, and the fourth latching device 221 disengages from the latch of the second latching device 12, so that the battery pack body 1 is separated from the vehicle body 3, preventing damage to the vehicle body 3 due to battery failure.

[0047] In this optional embodiment, by providing a third snap-fit ​​device 211 at one end of the first elastic member 21 that matches the snap-fit ​​shape of the first snap-fit ​​device 11, and providing a fourth snap-fit ​​device 221 at one end of the second elastic member 22 that matches the snap-fit ​​shape of the second snap-fit ​​device 12, when the bottom of the battery pack body 1 is subjected to friction from the ground, the battery pack body 1 can separate from the elastic member 2 under the action of friction, which can prevent damage to the vehicle body 3 due to battery failure.

[0048] Optionally, when the battery pack body 1 is in a fixed state, the third latching device 211 is housed in the slot of the first latching device 11, and the fourth latching device 221 is housed in the slot of the second latching device 12.

[0049] When the battery pack body 1 pops out and the bottom of the battery pack body 1 is rubbed, the third locking device 211 separates from the slot of the first locking device 11, and the fourth locking device 221 separates from the slot of the second locking device 12.

[0050] Specifically, when the vehicle is in normal operation, the battery pack body 1 is in a fixed state, the first elastic member 21 and the second elastic member 22 are in a compressed state, the third locking device 211 is housed in the slot of the first locking device 11, and the fourth locking device 221 is housed in the slot of the second locking device 12. Through the cooperation of the first locking device 11 and the third locking device 211, and the cooperation of the second locking device 12 and the fourth locking device 221, the battery pack body 1 is limited. When the battery pack body 1 pops out and the bottom of the battery pack body 1 is rubbed by the ground, the third locking device 211 separates from the slot of the first locking device 11, and the fourth locking device 221 separates from the slot of the second locking device 12, so that the battery pack body 1 is separated from the vehicle body 3, preventing damage to the vehicle body 3 due to battery failure.

[0051] In this optional embodiment, by providing a third latching device 211 at one end of the first elastic member 21 that matches the latching shape of the first latching device 11, and providing a fourth latching device 221 at one end of the second elastic member 22 that matches the latching shape of the second latching device 12, the battery pack body 1 can be limited relative to the elastic member 2 when the vehicle is driving normally. When the bottom of the battery pack body 1 is subjected to ground friction, damage to the vehicle body 3 due to battery failure can be prevented.

[0052] Optionally, the number of the first elastic element 21 and the second elastic element 22 is at least two, and the number of the second elastic element 22 is less than or equal to the number of the first elastic element 21;

[0053] And / or, the number of the first elastic element 21 is at least two, and the at least two first elastic elements 21 and the second elastic element 22 are arranged in a triangle.

[0054] Specifically, the elastic element 2 includes at least two first elastic elements 21 and two second elastic elements 22, and the number of second elastic elements 22 is less than or equal to the number of first elastic elements 21. When the battery pack body 1 detaches downwards, the cooperation of at least two first elastic elements 21 and at least two second elastic elements 22 can prevent the battery pack body 1 from tilting or other unexpected situations, making the movement trajectory of the battery pack body 1 more controllable. Alternatively, the number of first elastic elements 21 is at least two, and the at least two first elastic elements 21 and the second elastic elements 22 are arranged in a triangular distribution. Taking two first elastic elements 21 and one second elastic element 22 as an example, the triangular distribution of the two first elastic elements 21 and one second elastic element 22 makes the battery... The battery pack body 1 can obtain stable support in three directions. Under the action of vibration and impact during vehicle operation, this triangular distribution design can better absorb and buffer vibration, so that the battery pack body 1 can remain relatively stable under complex road conditions or high-speed driving. Moreover, the triangular distribution structure can keep the battery pack body 1 in a limited state under torsional force, effectively resisting deformation caused by torsion and improving the structure's torsional resistance. When the battery pack body 1 falls downward, the cooperation of the two first elastic members 21 and the second elastic member 22 can prevent the battery pack body 1 from tilting or other unexpected situations, making the movement trajectory of the battery pack body 1 more controllable, thereby ensuring that the battery pack body 1 lands smoothly.

[0055] In this optional embodiment, by reasonably distributing the first elastic member 21 and the second elastic member 22, it is possible to prevent unexpected situations such as tilting of the battery pack body 1, thereby ensuring that the battery pack body 1 lands smoothly.

[0056] Optionally, the battery pack further includes a connector 4, and the battery pack body 1 can be detachably connected to the power supply interface and communication interface of the vehicle body 3 through the connector 4.

[0057] Specifically, in combination Figures 4 to 6As shown, the battery pack also includes a connector 4, which is the power transmission channel between the battery pack body 1 and the vehicle's electrical system. It can efficiently and safely transmit the electrical energy in the battery pack body 1 to the vehicle's drive system, control system, and other electrical components. In addition to power transmission, the connector 4 is also responsible for signal transmission between the battery pack body 1 and the vehicle management system. Through the connector 4, the vehicle management system can obtain key parameters such as battery voltage, current, and temperature in real time to monitor the battery status and ensure safe operation. The battery pack body 1 can be detached from the power supply interface and communication interface of the vehicle body 3 through the connector 4, thereby realizing power supply and communication functions. When the battery pack body 1 falls downwards, the gravity of the battery pack body 1 can cause the connector 4 to disconnect, and then the battery pack body 1 will separate from the vehicle body 3 through friction with the ground.

[0058] In this optional embodiment, the battery pack body 1 is electrically connected to the vehicle body 3 via connector 4, thereby enabling the battery pack body 1 to provide power and communication functions.

[0059] Among them, combined Figure 5 and Figure 6 As shown, connector 4, first snap-fit ​​device 11 and second snap-fit ​​device 12 are arranged at intervals along the length of the vehicle. Before the battery pack body 1 falls downward, connector 4 disconnects first, which will not affect the force balance of the battery pack body 1 and can prevent the battery pack body 1 from tilting or other unexpected situations when connector 4 disconnects.

[0060] This invention also provides a vehicle including the aforementioned battery pack.

[0061] This invention also provides a battery pack separation method, applied to the aforementioned battery pack, comprising:

[0062] When the battery pack body 1 of the battery pack is detected to be in a preset fault state, the elastic element 2 of the battery pack is controlled to pop out the battery pack body 1.

[0063] When the bottom of the battery pack body 1 is subjected to friction, the battery end locking device of the battery pack body 1 separates from the elastic member 2, so that the battery pack body 1 is separated from the vehicle body 3.

[0064] Specifically, the sensor detects whether the battery pack body 1 is in a preset fault state (such as puncture, overheating, severe impact, and spontaneous combustion). When the battery pack body 1 is in a preset fault state, the power domain controller or battery management system controller controls the elastic element 2 of the battery pack to pop out the battery pack body 1. The battery pack body 1 falls downwards, and the elastic element 2 switches from a compressed state to a stretched state to hold the battery pack body 1 and prevent it from violently colliding with the ground when it falls downwards. When the bottom of the battery pack body 1 is rubbed by the ground, the battery end locking device separates from the elastic element 2, so that the battery pack body 1 separates from the vehicle body 3.

[0065] Optionally, the elastic element 2 controlling the battery pack to eject the battery pack body 1 includes:

[0066] Open the fixing device of the battery pack body 1 so that the elastic element 2 changes from a compressed state to a stretched state, and pop the battery pack body 1 out of the vehicle body 3.

[0067] Specifically, when the battery pack body 1 is separated, the fixing device of the battery pack body 1 is first opened, so that the battery pack body 1 begins to fall from the vehicle body 3. Since the elastic element 2 is in a compressed state at this time, the elastic element 2 changes from a compressed state to a stretched state. The battery pack body 1 can be popped out through the elastic element 2, which is conducive to quickly separating the battery pack body 1 from the vehicle body 3.

[0068] The beneficial effects of this embodiment are the same as those of the battery pack described above, and will not be repeated here.

[0069] While the present invention has been disclosed above, its scope of protection 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 scope of protection of the present invention.

Claims

1. A battery pack, characterized in that, It includes a battery pack body (1) and an elastic element (2). The battery pack body (1) is connected to the vehicle body (3) through the elastic element (2). When the battery pack body (1) is in a fixed state, the elastic element (2) is in a compressed state. When the battery pack body (1) pops down, the elastic element (2) is in a stretched state. The battery pack body (1) includes a battery end latching device (10) that is detachably connected to the elastic member (2). The battery end latching device (10) is used to separate from the elastic member (2) when the bottom of the battery pack body (1) is subjected to friction, so as to separate the battery pack body (1) from the vehicle body (3). The elastic element (2) includes a first elastic element (21) and a second elastic element (22) arranged at intervals along the length of the vehicle. The distance between the first elastic element (21) and the front of the vehicle is less than the distance between the second elastic element (22) and the front of the vehicle. The tension of the first elastic element (21) is greater than the tension of the second elastic element (22). The battery end clamping device (10) includes a first clamping device (11) that is detachably connected to the first elastic member (21) and a second clamping device (12) that is detachably connected to the second elastic member (22). Both the first clamping device (11) and the second clamping device (12) are provided with a clamping slot facing the front of the vehicle. When the bottom of the battery pack body (1) is rubbed, the battery end clamping device (10) separates from the elastic member (2) along the direction of the clamping slot.

2. The battery pack according to claim 1, characterized in that, One end of the first elastic member (21) and one end of the second elastic member (22) are both used to be fixedly connected to the vehicle body (3). The other end of the first elastic member (21) is provided with a third snap-fit ​​device (211) that matches the snap-fit ​​shape of the first snap-fit ​​device (11). The other end of the second elastic member (22) is provided with a fourth snap-fit ​​device (221) that matches the snap-fit ​​shape of the second snap-fit ​​device (12).

3. The battery pack according to claim 2, characterized in that, When the battery pack body (1) is in a fixed state, the third snap-fit ​​device (211) is housed in the slot of the first snap-fit ​​device (11), and the fourth snap-fit ​​device (221) is housed in the slot of the second snap-fit ​​device (12). When the battery pack body (1) pops out and the bottom of the battery pack body (1) is rubbed, the third locking device (211) separates from the slot of the first locking device (11), and the fourth locking device (221) separates from the slot of the second locking device (12).

4. The battery pack according to claim 1, characterized in that, The number of the first elastic element (21) and the second elastic element (22) is at least two, and the number of the second elastic element (22) is less than or equal to the number of the first elastic element (21); And / or, the number of the first elastic element (21) is at least two, and at least two of the first elastic elements (21) and the second elastic element (22) are arranged in a triangular distribution.

5. The battery pack according to claim 1, characterized in that, It also includes a connector (4), through which the battery pack body (1) can be detachably connected to the power supply interface and communication interface of the vehicle body (3).

6. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1 to 5.

7. A battery pack separation method, applied to the battery pack according to any one of claims 1 to 5, characterized in that, include: When the battery pack body (1) of the battery pack is detected to be in a preset fault state, the elastic element (2) of the battery pack is controlled to pop out the battery pack body (1); When the bottom of the battery pack body (1) is rubbed, the battery end locking device of the battery pack body (1) separates from the elastic member (2) so that the battery pack body (1) separates from the vehicle body (3).

8. The battery pack separation method according to claim 7, characterized in that, The elastic element (2) controlling the battery pack to eject the battery pack body (1) includes: Open the fixing device of the battery pack body (1) so that the elastic element (2) changes from a compressed state to a stretched state, and pop the battery pack body (1) out of the vehicle body (3).

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