Battery pack, vehicle and battery pack separation method

Abstract

The invention provides a battery pack, a vehicle and a battery pack separation method, and relates to the technical field of batteries. The battery pack comprises a battery pack body and an elastic piece, the battery pack body is connected with a vehicle body through the elastic piece, when the battery pack body is in a fixed state, the elastic piece is in a compressed state, and when the battery pack body pops up downwards, the elastic piece is in a stretched state; the battery pack body comprises a battery end clamping device detachably connected with the elastic piece, and the battery end clamping device is used for being separated from the elastic piece when the bottom of the battery pack body is rubbed, so that the battery pack body is separated from the vehicle body. The battery pack body can be popped up through the elastic piece, and the elastic piece can pull the battery pack body when in a stretched state, so that the battery pack body is prevented from violently colliding with the ground; when the bottom of the battery pack body is rubbed, the battery end clamping device is separated from the elastic piece, so that the battery pack body is separated from the vehicle body, and the battery pack body is prevented from damaging the vehicle body.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery pack, a vehicle and a battery pack separation method. Background Art

[0002] New energy vehicles (such as electric vehicles, plug-in hybrid vehicles and extended-range electric vehicles, etc.) usually 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, lower in cost and have a longer service life, but have lower energy density and poor low-temperature performance. Ternary lithium batteries have very high energy density, can provide a longer driving range, and have relatively good low-temperature performance, but have higher costs and lower safety.

[0003] Lithium iron phosphate batteries are safer in the event of battery failures (such as spontaneous combustion, punctures, and bumps), have better thermal stability, and have a relatively low risk of spontaneous combustion. Ternary lithium batteries are more likely to have internal short circuits under bumps or external impacts, causing the battery temperature to rise sharply, causing spontaneous combustion or explosion. However, whether new energy vehicles use lithium iron phosphate batteries or ternary lithium batteries, when accidents such as battery spontaneous combustion occur, the vehicle is often completely burned, causing serious losses to the lives and property of the driver and passengers. Summary of the invention

[0004] The problem solved by the present invention is how to reduce the loss caused by a battery failure such as spontaneous combustion.

[0005] In order to solve the above problems, the present invention provides a battery pack, a vehicle and a battery pack separation method.

[0006] In a first aspect, the present invention provides a battery pack, comprising a battery pack body and an elastic member, wherein the battery pack body is connected to a vehicle body through the elastic member, and when the battery pack body is in a fixed state, the elastic member is in a compressed state, and when the battery pack body pops up downward, the elastic member is in a stretched state;

[0007] The battery pack body includes a battery terminal clamping device detachably connected to the elastic member, and the battery terminal clamping 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 member includes a first elastic member and a second elastic member arranged at intervals along the length direction of the vehicle, the distance between the first elastic member and the front of the vehicle is smaller than the distance between the second elastic member and the front of the vehicle, and the tension of the first elastic member is greater than the tension of the second elastic member.

[0009] Optionally, the battery terminal clamping device includes a first clamping device and a second clamping device arranged on the top of the battery pack body, the first clamping device is detachably connected to the first elastic member, and the second clamping device is detachably connected to the second elastic member.

[0010] Optionally, both the first clamping device and the second clamping device are provided with a clamping socket, and both of the clamping sockets are arranged toward the front of the vehicle; one end of the first elastic member and one end of the second elastic member are used for fixed connection with the vehicle body, and the other end of the first elastic member is provided with a third clamping device matching the clamping shape of the first clamping device, and the other end of the second elastic member is provided with a fourth clamping device matching the clamping shape of the second clamping device.

[0011] Optionally, when the battery pack body is in a fixed state, the third clamping device is accommodated in the clamping port of the first clamping device, and the fourth clamping device is accommodated in the clamping port of the second clamping device;

[0012] When the battery pack body pops out and the bottom of the battery pack body is rubbed, the third clamping device is separated from the clamping port of the first clamping device, and the fourth clamping device is separated from the clamping port of the second clamping device.

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

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

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

[0016] In a second aspect, the present invention provides a vehicle comprising the above-mentioned battery pack.

[0017] In a third aspect, the present invention provides a battery pack separation method, which is applied to the above-mentioned battery pack, and the battery pack separation method comprises:

[0018] When it is detected that the battery pack body of the battery pack is in a preset fault state, controlling the elastic member of the battery pack to eject the battery pack body;

[0019] When the bottom of the battery pack body is rubbed, the battery terminal clamping device of the battery pack body is separated from the elastic member, so that the battery pack body is separated from the vehicle body.

[0020] Optionally, controlling the elastic member of the battery pack to eject the battery pack body comprises:

[0021] The fixing device of the battery pack body is opened to change the elastic member from a compressed state to a stretched state, and the battery pack body is ejected from the vehicle body.

[0022] The beneficial effects of the battery pack of the present invention are as follows: the battery pack body that needs to be separated can be ejected through the elastic member, and when the battery pack body is ejected downward to be close to the ground or in contact with the ground, the elastic member is in a stretched state, which can hold the battery pack body to prevent the battery pack body from violently colliding with the ground when falling downward, thereby avoiding battery explosion caused by violent collision, and preventing further damage to the battery pack body that is less damaged; when the bottom of the battery pack body is rubbed, the battery end clamping device separates from the elastic member, so that the battery pack body is separated from the vehicle body, preventing the battery pack body that has spontaneous combustion and other faults from causing damage to the vehicle body, and can reduce the loss caused by spontaneous combustion and other faults of the battery. Compared with the prior art that uses buffer devices such as airbags to reduce the collision of the battery pack with the ground, the structure of the present invention is simpler and effectively reduces the cost of battery separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the battery pack falling off according to an embodiment of the present invention;

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

[0025] Figure 3 A schematic diagram of a card connection according to an embodiment of the present invention;

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

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

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

[0029] Description of reference numerals:

[0030] 1-battery pack body, 2-elastic member, 3-vehicle body, 4-connector, 10-battery terminal clamping device, 11-first clamping device, 12-second clamping device, 21-first elastic member, 22-second elastic member, 211-third clamping device, 221-fourth clamping device. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0032] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0033] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0034] like Figure 1 As shown, a battery pack provided by an embodiment of the present invention includes a battery pack body 1 and an elastic member 2, wherein the battery pack body 1 is connected to a vehicle body 3 through the elastic member 2, and when the battery pack body 1 is in a fixed state, the elastic member 2 is in a compressed state, and when the battery pack body 1 pops up downward, the elastic member 2 is in a stretched state; the battery pack body 1 includes a battery terminal clamping device 10 detachably connected to the elastic member 2, and the battery terminal clamping device 10 is used to separate from the elastic member 2 when the bottom of the battery pack body 1 is rubbed, 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 member 2. The battery pack body 1 is connected to the vehicle body 3 through the elastic member 2. The battery pack body 1 is limited by the battery terminal clamping device 10 of the battery pack body 1 and the elastic member 2 (usually it is necessary to cooperate with a fixing device to fix the battery pack body 1). When the elastic member 2 is in a compressed state, the battery pack body 1 is in a fixed state. When separation is required (first the fixing device is opened so that the battery pack body 1 begins to fall and the elastic member 2 changes from a compressed state to a stretched state), the battery pack body 1 is ejected by the elastic member 2. When the battery pack body 1 is ejected downward to approach the ground or in contact with the ground, the elastic member 2 is in a stretched state, which can hold the battery pack body 1 to prevent the battery pack body 1 from colliding violently with the ground when it falls off. When the bottom of the battery pack body 1 is rubbed, the battery terminal clamping device 10 is separated from the elastic member 2, so that the battery pack body 1 is separated from the vehicle body 3, preventing the battery pack body 1 in a preset fault state (such as needle puncture, overtemperature, severe bump and spontaneous combustion) from causing damage to the vehicle body 3.

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

[0037] In this embodiment, the battery pack body 1 that needs to be separated can be ejected through the elastic member 2. When the battery pack body 1 is ejected downward, the elastic member 2 is in a stretched state, which can hold the battery pack body 1 to prevent the battery pack body 1 from violently colliding with the ground when falling downward, thereby avoiding battery explosion caused by collision, and also preventing further damage to the battery pack body 1 that is less damaged; when the bottom of the battery pack body 1 is rubbed, the battery end clamping device 10 separates from the elastic member 2, so that the battery pack body 1 is separated from the vehicle body 3, preventing the battery pack body 1 from causing damage to the vehicle body 3. Compared with the use of buffer devices such as airbags in the prior art, the structure of this embodiment is simpler, and the cost of battery separation is effectively reduced.

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

[0039] Specifically, combined Figure 1 and Figure 2As shown, the elastic member 2 includes a first elastic member 21 and a second elastic member 22 arranged at intervals along the length direction of the vehicle. The distance between the first elastic member 21 and the front of the vehicle is smaller than the distance between the second elastic member 22 and the front of the vehicle, that is, the first elastic member 21 is arranged closer to the front end of the vehicle relative to the second elastic member 22, and the tension of the first elastic member 21 is greater than the tension of the second elastic member 22. When the battery pack body 1 falls downward, the second elastic member 22 is stretched longer, so that the part of the battery pack body 1 close to the rear end of the vehicle is lower and contacts 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 close to the front end falls first, since the battery pack body 1 still has forward momentum, it may cause the battery pack body 1 to roll forward, so it is preferred to set the tension of the first elastic member 21 greater than the tension of the second elastic member 22.

[0040] Among them, in order to ensure that the battery does not roll over and lands smoothly after contacting the ground, the relative sizes of the tension of the first elastic member 21 and the tension of the second elastic member 22 can be set so that the angle of the battery pack body 1 when it just contacts the ground is 10° to 15°, which can not only prevent the battery pack body 1 from rolling due to excessive torque, but also reduce the contact impact force and effectively absorb vibration; taking the 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 just contacts the ground is 0.17m, and if the length of the battery pack body 1 is 0.2m, the maximum ground clearance when the battery pack body 1 just contacts the ground is 0.034m, which can ensure 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 the tension of the second elastic member 22, when the battery pack body 1 falls downward, the portion near the rear end of the vehicle is positioned lower and contacts the ground earlier, which is beneficial to the smooth landing of the battery pack body 1.

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

[0043] Specifically, Figure 1As shown, the battery terminal clamping device 10 includes a first clamping device 11 and a second clamping device 12 arranged on the top of the battery pack body 1, and the first clamping device 11 and the second clamping device 12 are arranged at intervals along the length direction of the vehicle to avoid occupying more space in the width direction of the vehicle; when the vehicle is driving normally, the first clamping device 11 and the second clamping device 12 can be used to limit the battery pack body 1, which can effectively prevent the battery pack body 1 from being relatively displaced with the elastic member 2 under acceleration, deceleration or collision, and the vibration generated during vehicle driving will be more evenly distributed to 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 off 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 off downward.

[0044] In this optional embodiment, by providing a first clamping device 11 and a second clamping device 12, the battery pack body 1 can be limited when the vehicle is driving normally, and when the battery pack body 1 falls off downward, the stability of the battery pack body 1 can be ensured.

[0045] Optionally, both the first clamping device 11 and the second clamping device 12 are provided with a bayonet, and both of the bayonet are arranged toward 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 be fixedly connected to the vehicle body 3, and the other end of the first elastic member 21 is provided with a third clamping device 211 matching the bayonet shape of the first clamping device 11, and the other end of the second elastic member 22 is provided with a fourth clamping device 221 matching the bayonet shape of the second clamping device 12.

[0046] Specifically, combined Figure 3 As shown, the first clamping device 11 and the second clamping device 12 are both provided with a clamping socket, and the clamping sockets are both arranged toward 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 clamping device 211 matching the clamping socket shape of the first clamping device 11, and the other end of the second elastic member 22 is provided with a fourth clamping device 221 matching the clamping socket shape of the second clamping device 12; when the bottom of the battery pack body 1 is rubbed by the ground, the third clamping device 211 is disengaged from the clamping socket opened by the first clamping device 11, and the fourth clamping device 221 is disengaged from the clamping socket opened by the second clamping device 12, so that the battery pack body 1 is separated from the vehicle body 3 to prevent damage to the vehicle body 3 due to battery failure.

[0047] In this optional embodiment, by providing a third snap-in device 211 that matches the snap-in shape of the first snap-in device 11 at one end of the first elastic member 21, and providing a fourth snap-in device 221 that matches the snap-in shape of the second snap-in device 12 at one end of the second elastic member 22, when the bottom of the battery pack body 1 is rubbed by the ground, the battery pack body 1 can be separated from the elastic member 2 under the action of the friction force, thereby preventing 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 clamping device 211 is accommodated in the clamping opening of the first clamping device 11, and the fourth clamping device 221 is accommodated in the clamping opening of the second clamping device 12;

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

[0050] Specifically, when the vehicle is driving normally, 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 clamping device 211 is accommodated in the clamping slot of the first clamping device 11, and the fourth clamping device 221 is accommodated in the clamping slot of the second clamping device 12. The battery pack body 1 is limited by the cooperation between the first clamping device 11 and the third clamping device 211 and the cooperation between the second clamping device 12 and the fourth clamping device 221. When the battery pack body 1 pops out and the bottom of the battery pack body 1 is rubbed by the ground, the third clamping device 211 is separated from the clamping slot of the first clamping device 11, and the fourth clamping device 221 is separated from the clamping slot of the second clamping device 12, so that the battery pack body 1 is separated from the vehicle body 3 to prevent damage to the vehicle body 3 due to battery failure.

[0051] In this optional embodiment, by providing a third clamping device 211 that matches the clamping shape of the first clamping device 11 at one end of the first elastic member 21, and providing a fourth clamping device 221 that matches the clamping shape of the second clamping device 12 at one end of the second elastic member 22, 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 rubbed by the ground, damage to the vehicle body 3 due to battery failure can be prevented.

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

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

[0054] Specifically, the elastic member 2 includes at least two first elastic members 21 and two second elastic members 22, and the number of the second elastic members 22 is less than or equal to the number of the first elastic members 21. When the battery pack body 1 falls off downward, the cooperation between the at least two first elastic members 21 and the at least two second elastic members 22 can prevent the battery pack body 1 from tilting and other unexpected situations, so that the movement trajectory of the battery pack body 1 when it is detached is more controllable; or the number of the first elastic members 21 is at least two, and at least two first elastic members 21 and the second elastic members 22 are distributed in a triangle. Taking two first elastic members 21 and one second elastic member 22 as an example, the two first elastic members 21 and one second elastic member 22 are distributed in a triangle, so that the battery pack body 1 can be easily moved. The package body 1 can obtain stable support in three directions. Under the influence of vibration and impact force during vehicle driving, this triangular distribution design can better absorb and buffer vibration, so that the battery pack body 1 can still remain relatively stable under complex road conditions or when driving at high speeds. The triangular distribution structure can maintain the limited state of the battery pack body 1 under the action of torsional force, effectively resist deformation caused by torsion, and improve the torsion resistance of the structure. When the battery pack body 1 falls off downward, the mutual cooperation of the two first elastic members 21 and the one second elastic member 22 can prevent the battery pack body 1 from unexpected situations such as tilting, so that the movement trajectory of the battery pack body 1 when it is detached is 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 the battery pack body 1 from unexpected situations such as tilting, 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 is detachably connected to a power supply interface and a communication interface of the vehicle body 3 via the connector 4 .

[0057] Specifically, combined Figures 4 to 6As shown, the battery pack also includes a connector 4, which is a power transmission channel between the battery pack body 1 and the vehicle's electrical system, and can efficiently and safely transmit the electric 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 is detachably connected to the power supply interface and communication interface of the vehicle body 3 through the connector 4, thereby realizing functions such as power supply and communication. When the battery pack body 1 falls downward, the gravity of the battery pack body 1 can disconnect the connector 4, and then the battery pack body 1 is separated 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 the connector 4 to realize functions such as power supply and communication of the battery pack body 1.

[0059] Among them, combined Figure 5 and Figure 6 As shown, the connector 4, the first clamping device 11 and the second clamping device 12 are arranged at intervals along the length direction of the vehicle. Before the battery pack body 1 falls off downward, the connector 4 is disconnected 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 at the moment the connector 4 is disconnected.

[0060] An embodiment of the present invention further provides a vehicle, comprising the above-mentioned battery pack.

[0061] An embodiment of the present invention further provides a battery pack separation method, which is applied to the above-mentioned battery pack, comprising:

[0062] When it is detected that the battery pack body 1 of the battery pack is in a preset fault state, the elastic member 2 of the battery pack is controlled to eject the battery pack body 1;

[0063] When the bottom of the battery pack body 1 is rubbed, the battery terminal clamping device of the battery pack body 1 is separated from the elastic member 2 , so that the battery pack body 1 is separated from the vehicle body 3 .

[0064] Specifically, a sensor is used to detect whether the battery pack body 1 is in a preset fault state (such as needle puncture, overtemperature, severe bump and spontaneous combustion, etc.). When the battery pack body 1 is in a preset fault state, the power domain controller or the battery management system controller controls the elastic member 2 of the battery pack to eject the battery pack body 1, and the battery pack body 1 falls off downward. The elastic member 2 switches from a compressed state to a stretched state, and holds the battery pack body 1 to prevent the battery pack body 1 from colliding violently with the ground when falling downward. When the bottom of the battery pack body 1 is rubbed by the ground, the battery terminal clamping device separates from the elastic member 2, so that the battery pack body 1 is separated from the vehicle body 3.

[0065] Optionally, controlling the elastic member 2 of the battery pack to eject the battery pack body 1 comprises:

[0066] The fixing device of the battery pack body 1 is opened to change the elastic member 2 from a compressed state to a stretched state, and the battery pack body 1 is ejected from 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 starts to fall from the vehicle body 3. Since the elastic member 2 is in a compressed state at this time, the elastic member 2 changes from a compressed state to a stretched state. The battery pack body 1 can be ejected through the elastic member 2, which is conducive to quickly realizing the separation of the battery pack body 1 from the vehicle body 3.

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

[0069] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: The battery pack body (1) comprises a battery pack body (1) and an elastic member (2), wherein the battery pack body (1) is connected to a vehicle body (3) via the elastic member (2); when the battery pack body (1) is in a fixed state, the elastic member (2) is in a compressed state; and when the battery pack body (1) pops up downward, the elastic member (2) is in a stretched state; The battery pack body (1) includes a battery terminal clamping device (10) detachably connected to the elastic member (2), and the battery terminal 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).

2. The battery pack according to claim 1, characterized in that: The elastic member (2) comprises a first elastic member (21) and a second elastic member (22) which are arranged at intervals along the length direction of the vehicle, the distance between the first elastic member (21) and the front of the vehicle is smaller than the distance between the second elastic member (22) and the front of the vehicle, and the tension of the first elastic member (21) is greater than the tension of the second elastic member (22).

3. The battery pack according to claim 2, characterized in that: The battery terminal clamping device (10) comprises a first clamping device (11) and a second clamping device (12) arranged on the top of the battery pack body (1), the first clamping device (11) being detachably connected to the first elastic member (21), and the second clamping device (12) being detachably connected to the second elastic member (22).

4. The battery pack according to claim 3, characterized in that: The first clamping device (11) and the second clamping device (12) are both provided with a clamping port, and both of the clamping ports are arranged toward 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 clamping device (211) whose shape matches the clamping port of the first clamping device (11), and the other end of the second elastic member (22) is provided with a fourth clamping device (221) whose shape matches the clamping port of the second clamping device (12).

5. The battery pack according to claim 4, characterized in that: When the battery pack body (1) is in a fixed state, the third clamping device (211) is accommodated in the clamping port of the first clamping device (11), and the fourth clamping device (221) is accommodated in the clamping port of the second clamping device (12); When the battery pack body (1) pops out and the bottom of the battery pack body (1) is rubbed, the third clamping device (211) is separated from the clamping port of the first clamping device (11), and the fourth clamping device (221) is separated from the clamping port of the second clamping device (12).

6. The battery pack according to claim 2, characterized in that: The number of the first elastic members (21) and the number of the second elastic members (22) are both at least two, and the number of the second elastic members (22) is less than or equal to the number of the first elastic members (21); And / or, the number of the first elastic members (21) is at least two, and at least two of the first elastic members (21) and the second elastic members (22) are distributed in a triangle.

7. The battery pack according to claim 1, characterized in that: It also comprises a connector (4), and the battery pack body (1) is detachably connected to the power supply interface and the communication interface of the vehicle body (3) via the connector (4).

8. A vehicle, characterized in that: A battery pack comprising any one of claims 1 to 7.

9. A battery pack separation method, applied to the battery pack according to any one of claims 1 to 7, characterized in that: include: When it is detected that the battery pack body (1) of the battery pack is in a preset fault state, controlling the elastic member (2) of the battery pack to eject the battery pack body (1); When the bottom of the battery pack body (1) is subjected to friction, the battery terminal clamping device of the battery pack body (1) is separated from the elastic member (2), so that the battery pack body (1) is separated from the vehicle body (3).

10. The battery pack separation method according to claim 9, characterized in that: The step of controlling the elastic member (2) of the battery pack to eject the battery pack body (1) comprises: The fixing device of the battery pack body (1) is opened to change the elastic member (2) from a compressed state to a stretched state, and the battery pack body (1) is ejected from the vehicle body (3).

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