Battery pack and vehicle

Abstract

The invention discloses a battery pack and a vehicle. The battery pack comprises a battery cell module; the buffer structure comprises an inflation module and at least one compartment group; each compartment group comprises a plurality of compartments, and the plurality of compartments in each compartment group are arranged on the same side of the battery cell module and are arranged along the extension direction of the side; the inflation module can inflate buffer gas into any compartment; wherein the inflation module can inflate buffer gas into the compartment, closest to the collision position, in the compartment group between the collision position and the battery cell module, so that the purpose of buffering is achieved. Besides, due to the fact that the compartments are separated, the air pressure in the compartment closest to the collision position cannot be dispersed immediately, the pressure is large, the impact force faced by the battery cell module can be better resisted, the better buffering effect is achieved, and the risk that the battery cell module is damaged is reduced.

Description

Technical Field

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

[0002] With the rapid development of the electric vehicle industry, the integration technology of power battery packs is also changing with each passing day; among them, the high safety of power battery packs has always been the theme required by the industry.

[0003] In the related art, the battery cell module of the power battery pack mainly relies on the collapse of the side beams arranged on its side to achieve side collision safety; some solutions are to add airbags on the sides of the battery cell module to achieve side collision safety. However, when a collision occurs, the gas filled in the airbag will immediately diffuse, causing the air pressure in the airbag close to the collision point to be difficult to resist the impact force, and the protection effect is poor. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery pack that can reduce the risk of damage to the battery cell module of a vehicle after a collision.

[0005] The present invention also provides a vehicle having the battery pack.

[0006] A battery pack according to an embodiment of the first aspect of the present invention is applied to a vehicle provided with a collision sensor and a controller, wherein the collision sensor is used to detect a collision position of the vehicle, and comprises: a battery cell module; a buffer structure, wherein the buffer structure comprises an inflation module and at least one group of compartment groups; each group of the compartment groups comprises a plurality of compartments, and the plurality of compartments in each group of the compartment groups are arranged on the same side of the battery cell module and arranged along the extension direction of the side; the inflation module is capable of filling buffer gas into any one of the compartments; wherein the inflation module is configured to: be capable of filling buffer gas into the compartment facing the collision position of the vehicle and closest to the collision position in response to an inflation signal from the controller.

[0007] According to some embodiments of the present invention, the inflation module comprises a plurality of first gas generators arranged corresponding to each of the compartments; each of the first gas generators can be independently turned on to generate the buffer gas;

[0008] The first gas generator corresponding to the compartment facing the collision position and closest to the collision position can be turned on in response to the inflation signal of the controller.

[0009] According to some embodiments of the present invention, the inflation module includes a second gas generator and a plurality of air pipe assemblies arranged corresponding to each of the compartments, the air pipe assembly includes an air pipe and a control valve for controlling the opening and closing of the air pipe, the second gas generator is connected to each of the compartments through each of the air pipes, and the second gas generator can be turned on to generate the buffer gas;

[0010] Wherein, the control valve on the air pipe assembly corresponding to the compartment facing the collision position and closest to the collision position can be opened in response to the inflation signal of the controller, and the second gas generator can be opened in response to the inflation signal of the controller.

[0011] According to some embodiments of the present invention, the inflation module is configured to: respond to the inflation signal of the controller, and fill buffer gas into each of the compartments in sequence according to the distance between each compartment facing the collision position and the collision position from near to far.

[0012] According to some embodiments of the present invention, the buffer structure further includes at least one group of airbag groups, wherein the airbag groups are arranged on the sides of the battery cell module, each group of the airbag groups includes a plurality of airbags, and the internal space of the airbags is the compartment.

[0013] According to some embodiments of the present invention, the buffer structure also includes at least one airbag, which is arranged on the side of the battery cell module. A plurality of elastic diaphragms are arranged inside the airbag, and the plurality of elastic diaphragms divide the internal space of the airbag into a plurality of compartments.

[0014] According to some embodiments of the present invention, the buffer structure also includes a protective frame surrounding the outside of the battery cell module, the protective frame having a side beam; the side beam is provided with a cavity, a plurality of elastic diaphragms are arranged inside the cavity, and the plurality of elastic diaphragms divide the cavity into a plurality of compartments.

[0015] According to some embodiments of the present invention, the plurality of compartments of the same compartment group are arranged in the cavity; and / or the plurality of compartments of the same compartment group are arranged between the side beam and the battery cell module; and / or the plurality of compartments of the same compartment group are arranged on a side of the side beam away from the battery cell module.

[0016] According to the second aspect of the present invention, the battery pack comprises: a battery cell module; a buffer structure, the buffer structure comprising an inflation module and at least one group of compartment groups; each group of the compartment groups comprises a plurality of compartments, and the plurality of compartments in each group of the compartment groups are arranged on the same side of the battery cell module and arranged along the extension direction of the side; the inflation module comprises a plurality of third gas generators arranged corresponding to the compartments; in the corresponding third gas generators and the compartments: the third gas generator is located on the side of the compartment away from the battery cell module, and the third gas generator can be hit to generate buffer gas which is filled into the compartment.

[0017] According to some embodiments of the present invention, the buffer structure further includes at least one group of airbag groups, wherein the airbag groups are arranged on the sides of the battery cell module, each group of the airbag groups includes a plurality of airbags, and the internal space of the airbags is the compartment.

[0018] According to some embodiments of the present invention, the buffer structure also includes at least one airbag, which is arranged on the side of the battery cell module. A plurality of elastic diaphragms are arranged inside the airbag, and the plurality of elastic diaphragms divide the internal space of the airbag into a plurality of compartments.

[0019] According to some embodiments of the present invention, the buffer structure also includes a protective frame surrounding the outside of the battery cell module, the protective frame having a side beam; the side beam is provided with a cavity, a plurality of elastic diaphragms are arranged inside the cavity, and the plurality of elastic diaphragms divide the cavity into a plurality of compartments.

[0020] According to some embodiments of the present invention, the plurality of compartments of the same compartment group are arranged in the cavity; and / or the plurality of compartments of the same compartment group are arranged between the side beam and the battery cell module; and / or the plurality of compartments of the same compartment group are arranged on a side of the side beam away from the battery cell module.

[0021] A vehicle according to an embodiment of the third aspect of the present invention comprises a battery pack according to an embodiment of the first aspect or an embodiment of the second aspect of the present invention.

[0022] The battery pack and vehicle of each embodiment of the present invention have at least the following beneficial effects:

[0023] When a vehicle collides, the inflation module can fill the compartment closest to the collision position with buffer gas to achieve the purpose of buffering. In addition, since the compartments are separated, the air pressure in the compartment closest to the collision position cannot be dispersed immediately, and the pressure is relatively high, which can better resist the impact force faced by the battery module, achieve a better buffering effect, and reduce the risk of damage to the battery module.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

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

[0027] Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure of the figure shown;

[0028] Figure 3 for Figure 2 The figure shown is a schematic diagram of the structure after the buffer gas is filled in the compartment;

[0029] Figure 4 for Figure 1 Another partial cross-sectional structural schematic diagram of the figure shown;

[0030] Figure 5 for Figure 4 The figure shown is a schematic diagram of the structure after the buffer gas is filled in the compartment;

[0031] Figure 6 A schematic diagram of the structure of a compartment in another embodiment of the present invention;

[0032] Figure 7 A schematic structural diagram of a compartment according to another embodiment of the present invention;

[0033] Figure 8 It is a schematic diagram of a partial cross-sectional structure of a battery pack according to another embodiment of the present invention.

[0034] Figure Number:

[0035] 100. Battery cell module;

[0036] 200, buffer structure; 201, compartment group; 210, airbag; 211, compartment; 212, elastic diaphragm; 220, inflation module; 221, first gas generator; 230, protection frame; 231, side beam; 2311, chamber; 232, front beam; 233, rear beam; 234, bottom plate; 235, top plate; 236, connecting flange;

[0037] 300. Threshold beam. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] like Figure 1 As shown, the present invention provides a battery pack, which can be used in a vehicle as a power battery. The vehicle can be a private car, such as a sedan, SUV, MPV or pickup truck, etc.; the vehicle can also be an operating vehicle, such as a van; in addition, the vehicle can be a hybrid vehicle or a pure electric vehicle.

[0042] like Figure 1 As shown, the battery pack includes a battery cell module 100 and a buffer structure 200 . The buffer structure 200 can provide buffering for the battery cell module 100 when a vehicle collides, thereby reducing the risk of damage to the battery cell module 100 .

[0043] Combination Figure 2 and Figure 4 The buffer structure 200 includes a compartment group 201 and an inflation module 220 .

[0044] It should be noted that the number of compartment groups 201 may be one group, or two groups, or more than two groups.

[0045] Combination Figure 1 , Figure 2 and Figure 4 In some embodiments, the number of compartment groups 201 is one group, and the compartment groups 201 are arranged on one side of the battery cell module 100; in some other embodiments, the number of compartment groups 201 is multiple groups, and the multiple compartment groups 201 are respectively arranged on each side of the battery cell module 100.

[0046] Specifically in this embodiment, compartment groups 201 are disposed on both the left and right sides of the battery cell module 100 .

[0047] It should be noted that one or more compartment groups 201 may be provided on the same side of the battery cell module 100 . When multiple compartment groups 201 are provided on the same side of the battery cell module 100 , the compartment groups 201 are arranged along the height direction of the battery cell module 100 .

[0048] Each compartment group 201 includes a plurality of compartments 211 , and the plurality of compartments 211 in each compartment group 201 are disposed on the same side of the battery cell module 100 and arranged along the extension direction of the side.

[0049] It is understandable that in Figure 1 In the embodiment shown, the combination Figure 1 and Figure 4 The multiple compartments 211 of the compartment group 201 located on the left side of the battery cell module 100 are arranged along the length direction of the left side of the battery cell module 100 , and the multiple compartments 211 of the compartment group 201 located on the right side of the battery cell module 100 are arranged along the length direction of the right side of the battery cell module 100 .

[0050] like Figures 2 to 5 As shown, the inflation module 220 is capable of filling any compartment 211 with buffer gas.

[0051] It is understandable that when the inflation module 220 fills the compartment 211 with buffer gas, the internal air pressure of the compartment 211 can be enhanced, thereby having a buffering effect on the impact force faced by the battery cell module 100 .

[0052] In some embodiments, the vehicle further includes a collision sensor (not shown) and a controller (not shown). The collision sensor is connected to the input end of the controller, and the inflation module 220 is connected to the output end of the controller. In addition, the collision sensor and / or the inflation module 220 may be connected to the controller by wired connection or wireless connection.

[0053] It should be noted that the collision sensor is a vital component in the vehicle safety system. It is mainly used to detect the intensity, direction and collision position of the collision when the vehicle collides. There are multiple collision sensors, which are distributed in the front part, both sides of the body and the rear part of the vehicle. With the help of multiple collision sensors, when the vehicle collides, the controller can obtain the collision position of the vehicle based on the collision sensors.

[0054] The inflation module 220 is configured to: be able to charge buffer gas into the compartment 211 facing the collision position of the vehicle and closest to the collision position in response to the inflation signal of the controller, wherein the inflation signal is triggered by the collision sensor. It can also be understood that the controller is configured to: obtain the collision position of the vehicle based on the collision sensor, and control the inflation module 220 to charge buffer gas into the compartment 211 facing the collision position and closest to the collision position.

[0055] It is understandable that when a vehicle collides, the controller can learn that the vehicle has been collided based on the signal fed back by the collision sensor, and can also obtain the collision position of the vehicle through the collision sensor, thereby releasing an inflation signal to the inflation module 220, so that the inflation module 220 fills the buffer gas into the compartment 211 closest to the collision position in the compartment group 201 between the collision position and the battery module 100, so as to achieve the purpose of buffering. In addition, since each compartment 211 is separated, the air pressure in the compartment 211 closest to the collision position cannot be dispersed immediately, and the pressure is relatively high, which can better resist the impact force that the battery module 100 will face, and the compartment 211 closest to the collision position has a relatively small volume, and after being filled with gas, the pressure can be increased as soon as possible, and the response speed is faster. In this way, the buffer structure 200 can achieve a better buffering effect and reduce the risk of damage to the battery module 100.

[0056] It should be noted that after the controller controls the inflation module 220 to fill the buffer gas into the compartment 211 closest to the collision position of the vehicle, the controller may choose to fill the buffer gas into other compartments 211, or may choose not to fill the buffer gas. In some embodiments, the inflation module 220 is configured to respond to the inflation signal of the controller and fill the buffer gas into each compartment 211 in sequence according to the distance between each compartment 211 facing the collision position and the collision position from near to far.

[0057] like Figure 1As shown, further, the buffer structure 200 also includes a protective frame 230 arranged outside the battery cell module 100. Specifically, the protective frame 230 has two side beams 231, one of which is arranged on the left side of the battery cell module 100, and the other side beam 231 is arranged on the right side of the battery cell module 100. In addition, the protective frame 230 also includes a rear beam 233 connected to the rear ends of the two side beams 231, and a front beam 232 connected to the front ends of the two side beams 231, the rear beam 233 is located on the rear side of the battery cell module 100, and the front beam 232 is located on the front side of the battery cell module 100. The protective frame 230 itself has a certain rigidity, and when the vehicle collides, it can protect the battery cell module 100, wherein the protective frame 230 can be fixedly installed through the connecting flange 236.

[0058] It is understandable that in order to further improve the protection effect of the protection frame 230, it is necessary to set a distance between the battery module 100 and the side beam 231, so as to reduce the risk of the side beam 231 hitting the battery module 100 after the side beam 231 collapses. In the present application, by optimizing the buffer structure 200, that is, by setting a compartment group 201 that can be filled with buffer gas on the left and right sides of the battery module 100 to improve the buffer effect of the buffer structure 200, the distance between the battery module 100 and the side beam 231 can be reduced, which is conducive to making the battery module 100 larger and improving the energy storage effect.

[0059] like Figure 8 As shown, of course, in some embodiments, the protection frame 230 also includes a bottom plate 234 for supporting the battery cell module 100 , and a top plate 235 for covering and protecting the battery cell module 100 .

[0060] The structure of each group of multiple compartments 211 is described below:

[0061] like Figure 4 , Figure 5As shown, in some embodiments, the buffer structure 200 includes at least one airbag 210, each airbag 210 corresponds to each group of compartment groups 201, wherein a plurality of elastic membranes 212 are arranged inside the airbag 210, and the plurality of elastic membranes 212 divide the internal space of the airbag 210 into a plurality of compartments 211; each airbag 210 is configured to be arranged on any side of the battery cell module 100 and to arrange the plurality of compartments 211 inside it along the extension direction of the side. Specifically, the number of airbags 210 is two, and the two airbags 210 are arranged on the left and right sides of the battery cell module 100 respectively; the plurality of compartments 211 of the airbag 210 located on the left side of the battery cell module 100 are arranged along the length direction of the left side of the battery cell module 100, and the plurality of compartments 211 of the airbag 210 located on the right side of the battery cell module 100 are arranged along the length direction of the right side of the battery cell module 100. In addition, in these embodiments, when the elastic membrane 212 of the compartment 211 filled with buffer gas is ruptured by the buffer gas, the buffer gas can enter other compartments 211 to achieve a larger area of ​​buffering. Figure 8 As shown, the airbag 210 can be set inside the side beam 231, or in the space between the side beam 231 and the battery module 100, or on the side of the side beam 231 away from the battery module 100 (between the side beam 231 and the door sill beam 300).

[0062] like Figure 6 As shown, in other embodiments, the side beam 231 is provided with a chamber 2311, and a plurality of elastic diaphragms 212 are provided inside the chamber 2311, and the plurality of elastic diaphragms 212 divide the chamber 2311 of the side beam 231 into a plurality of compartments 211. Specifically, the plurality of compartments 211 of the side beam 231 located on the left side of the battery cell module 100 are arranged along the length direction of the left side of the battery cell module 100, and the plurality of compartments 211 of the airbag 210 located on the right side of the battery cell module 100 are arranged along the length direction of the right side of the battery cell module 100. In addition, in these embodiments, when the elastic diaphragm 212 of the compartment 211 filled with buffer gas is ruptured by the buffer gas, the buffer gas can enter other compartments 211 to achieve a larger area of ​​buffering.

[0063] like Figure 7As shown, in some other embodiments, the buffer structure 200 includes at least one group of airbag groups, each group of airbag groups corresponds to each group of compartment groups 201, wherein each group of airbag groups includes a plurality of airbags 210, and the internal space of the airbag 210 is a compartment 211; the plurality of airbags 210 of each group of airbag groups are configured as follows: being arranged on the same side of the battery cell module 100 and arranged along the extension direction of the side. Specifically, there are two groups of airbag groups, and the two groups of airbag groups are respectively arranged on the left and right sides of the battery cell module 100. The plurality of airbags 210 of the airbag group located on the left side of the battery cell module 100 are arranged along the length direction of the left side of the battery cell module 100, and the plurality of airbags 210 of the airbag group located on the right side of the battery cell module 100 are arranged along the length direction of the right side of the battery cell module 100. Please refer to Figure 8 It should be noted that the multiple airbags 210 of the airbag group can be arranged inside the side beam 231; can also be arranged in the space between the side beam 231 and the battery module 100; can also be arranged on the side of the side beam 231 away from the battery module 100 (between the side beam 231 and the door sill beam 300).

[0064] Several structures of the inflation module 220 are described below:

[0065] like Figures 2 to 5 As shown, in some embodiments, the inflation module 220 includes a plurality of first gas generators 221 arranged corresponding to each compartment 211, and each first gas generator 221 can be independently turned on to generate buffer gas. In other words, in the first gas generators 221 and compartments 211 corresponding to each other, the first gas generator 221 can generate buffer gas to be filled into the compartment 211 after being turned on; specifically, the first gas generator 221 includes a gas generating agent (NaN3) arranged in the compartment 211, and an ignition device for igniting the gas generating agent, the ignition device is connected to the controller, and the ignition device can heat the gas generating agent after being triggered, so that the gas generating agent generates gas and fills the compartment 211. Among them, the first gas generator 221 corresponding to the compartment 211 facing the collision position of the vehicle and closest to the collision position can be turned on in response to the inflation signal of the controller. It should be noted that in some other embodiments, a medicine chamber may be provided near the compartment 211 , and the gas generating agent may be provided in the medicine chamber. After the ignition device is ignited, the gas generating agent may be heated, so that the gas generating agent generates gas and fills the compartment 211 .

[0066] In some other embodiments, the inflation module 220 includes a second gas generator and a plurality of air pipe assemblies corresponding to each compartment 211, the air pipe assembly includes an air pipe and a control valve for controlling the opening and closing of the air pipe, the second gas generator is connected to each compartment 211 through each air pipe, and the second gas generator can be turned on to generate buffer gas; wherein, the second gas generator can be an air pump, or the first gas generator 221 of the above embodiment, when the second gas generator is turned on and the control valve on the air pipe is in an open state, the second gas generator can fill the buffer gas into the compartment 211 through the air pipe. wherein, the control valve on the air pipe assembly corresponding to the compartment 211 facing the collision position of the vehicle and closest to the collision position can be turned on in response to the inflation signal of the controller, and the second gas generator can be turned on in response to the inflation signal of the controller.

[0067] In the above embodiment, the inflation module 220 is actively opened under the control of the controller, so the controller can open the inflation module 220 in advance before the impact force is transmitted to the inflation module 220 based on the collision signal detected by the collision sensor, thereby further improving the buffering effect.

[0068] In some other embodiments, the inflation module 220 includes a plurality of third gas generators corresponding to each compartment 211; in the third gas generators and compartments 211 corresponding to each other: the third gas generator is located on the side of the compartment 211 away from the battery module 100, and the third gas generator can be hit to generate buffer gas filled into the compartment 211. It can be understood that in these embodiments, the inflation module 220 can fill the buffer gas into the compartment 211 without the control of the controller, and the third gas generator will automatically fill the buffer gas into the corresponding compartment 211 after being physically hit. In addition, since the third gas generator is located on the side of the compartment 211 away from the battery module 100 in the third gas generators and compartments 211 corresponding to each other, the impact force when the vehicle is hit will first impact the third gas generator to fill the corresponding compartment 211 with buffer gas, so that effective buffering of the impact force can be achieved. In these embodiments, when a collision occurs at a certain position of the vehicle, the inflation module 220 can first fill the compartment 211 closest to the collision position with buffer gas. On the other hand, it does not require the participation of the controller, which can reduce control requirements.

[0069] The third gas generator may include a chamber connected to the compartment 211, a gas generating agent (NaN3) disposed in the chamber, and a heating device for heating the gas generating agent after a collision so that the gas generating agent generates a buffer gas. It is understandable that when the vehicle is hit, the impact force is transmitted to the heating device, so that the heating device heats the gas generating agent to release the buffer gas, and the buffer gas then enters the compartment 211 to achieve buffering.

[0070] It should be noted that the heating device can be a heating wire device, which is equipped with a switch, and the switch is located on the side of the entire heating device away from the compartment 211. When the vehicle is hit, the impact force will trigger the switch, so that the heating wire device works to heat the gas-generating agent. Of course, in other embodiments, the third gas generator can also have other structures.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, applied to a vehicle provided with a collision sensor and a controller, wherein the collision sensor is used to detect the collision position of the vehicle, characterized in that: include: Battery cell module; A buffer structure, the buffer structure comprising an inflatable module and at least one group of compartments; Each of the compartment groups comprises a plurality of compartments, and the plurality of compartments in each of the compartment groups are arranged on the same side of the battery core module and arranged along the extension direction of the side; the inflation module is capable of filling buffer gas into any of the compartments; The inflation module is configured to fill the buffer gas into the compartment facing the collision position of the vehicle and closest to the collision position in response to the inflation signal of the controller.

2. The battery pack according to claim 1, characterized in that: The inflation module comprises a plurality of first gas generators arranged corresponding to the compartments; each of the first gas generators can be independently turned on to generate the buffer gas; The first gas generator corresponding to the compartment facing the collision position and closest to the collision position can be turned on in response to the inflation signal of the controller.

3. The battery pack according to claim 1, characterized in that: The inflation module includes a second gas generator and a plurality of air pipe assemblies arranged corresponding to each of the compartments, the air pipe assembly includes an air pipe and a control valve for controlling the opening and closing of the air pipe, the second gas generator is connected to each of the compartments through each of the air pipes, and the second gas generator can be turned on to generate the buffer gas; Wherein, the control valve on the air pipe assembly corresponding to the compartment facing the collision position and closest to the collision position can be opened in response to the inflation signal of the controller, and the second gas generator can be opened in response to the inflation signal of the controller.

4. The battery pack according to claim 1, characterized in that: The inflation module is configured to respond to the inflation signal of the controller and to fill buffer gas into each of the compartments in sequence according to the distance between each of the compartments facing the collision position and the collision position from near to far.

5. A battery pack, characterized in that: include: Battery cell module; A buffer structure, the buffer structure comprising an inflatable module and at least one group of compartment groups; Each of the compartment groups includes a plurality of compartments, and the plurality of compartments in each of the compartment groups are arranged on the same side of the battery core module and arranged along the extension direction of the side; the inflation module includes a plurality of third gas generators arranged corresponding to each of the compartments; In the third gas generator and the compartment corresponding to each other: the third gas generator is located at a side of the compartment away from the battery cell module, and the third gas generator can be hit to generate buffer gas which is filled into the compartment.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The buffer structure also includes at least one group of airbag groups, which are arranged on the side of the battery core module. Each group of the airbag groups includes a plurality of airbags, and the internal space of the airbags is the compartment.

7. The battery pack according to any one of claims 1 to 5, characterized in that: The buffer structure also includes at least one airbag, which is arranged on the side of the battery module. A plurality of elastic diaphragms are arranged inside the airbag, and the plurality of elastic diaphragms divide the internal space of the airbag into a plurality of compartments.

8. The battery pack according to any one of claims 1 to 5, characterized in that: The buffer structure further includes a protection frame arranged around the outside of the battery module, and the protection frame has a side beam; The side beam is provided with a cavity, and a plurality of elastic diaphragms are arranged inside the cavity. The plurality of elastic diaphragms divide the cavity into a plurality of compartments.

9. The battery pack according to any one of claims 1 to 5, characterized in that: The buffer structure further includes a protection frame arranged around the outside of the battery module, and the protection frame has a side beam; The side beam is provided with a cavity, and the multiple compartments of the same compartment group are arranged in the cavity; and / or the multiple compartments of the same compartment group are arranged between the side beam and the battery cell module; and / or the multiple compartments of the same compartment group are arranged on the side of the side beam away from the battery cell module.

10. A vehicle, characterized in that: A battery pack comprising any one of claims 1 to 9.

Images