CN115360475A

CN115360475A - Power battery and vehicle

Info

Publication number: CN115360475A
Application number: CN202211136307.5A
Authority: CN
Inventors: 孙昊成; 胡涛; 肖星辰; 董海静
Original assignee: Mercedes Benz Group AG
Current assignee: Mercedes Benz Group AG
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2022-11-18

Abstract

The invention proposes a power battery, wherein the power battery (1) comprises: at least one electrical core (10); a housing (20) having a receiving chamber (21) for receiving the battery cell (10) and having an opening (22); a closure (30) secured to the housing (20) by a connecting structure (50) and closing the opening (22); and an explosive (40) arranged at the connecting structure (50) and capable of being detonated to break the connecting structure (50) such that the closure (30) is at least partially disengageable from the housing (20). The invention also relates to a vehicle. By detonating an explosive substance arranged at the connection structure, the connection structure between the closure and the housing can be actively broken, thereby opening the opening so that the gas in the housing of the power cell can be discharged in time via the opening. This active venting can improve reliability.

Description

Power battery and vehicle

Technical Field

The invention relates to the field of power batteries, in particular to a power battery and a vehicle.

Background

Currently, power batteries, such as lithium ion batteries, may be used to power and power electric vehicles, hybrid vehicles, watercraft, aircraft, and like vehicles. With the development of technology, the market demand for power batteries is expanding rapidly, and the safety requirement for power batteries is higher and higher. Taking a lithium ion battery as an example, under abuse conditions such as high temperature, needling, extrusion, overcharge and the like, or when a short circuit occurs inside a battery cell, the temperature of the battery cell can continuously rise, and then thermal runaway occurs. The temperature rise of the cell may further induce side reactions and generate a large amount of gas. The temperature and the pressure in the shell of the power battery are both increased sharply and spread to adjacent cells or modules, so that thermal runaway is caused, and even the whole battery pack is ignited or exploded.

In order to delay thermal escape and avoid thermal runaway, an explosion-proof valve can be arranged on a shell of the power battery so as to discharge high-temperature and high-pressure gas out of the shell in time when the thermal runaway occurs, thereby reducing the temperature of the power battery and avoiding the occurrence of structural damage of a battery energy storage system and further causing fire. The current explosion-proof valve for power battery can realize pressure relief and explosion prevention by means of spring, acupuncture or valve. When the air pressure in the shell of the power battery reaches a certain pressure level, the spring or the valve structure can be pushed open through high pressure, or the thin film can be punctured through a sharp structure, so that the pressure relief channel is opened, and the rapid pressure relief is realized.

However, the explosion-proof valve can only realize passive pressure relief, and the explosion-proof valve is passively opened after the air pressure in the shell of the power battery is increased to a certain pressure level due to thermal escape. The opening pressure of the explosion-proof valve tends to be unstable. Therefore, there may occur a case where the explosion-proof valve cannot be normally opened after the air pressure in the power battery rises. In order to achieve a stable opening pressure, high demands are made on the material and the processing technology of the explosion-proof valve. In addition, in explosion-proof valves, the pressure relief channel, which is opened by means of a spring, a needle stick or a valve, often has only a small flow area, so that the pressure relief is inefficient.

Therefore, the prior art still has the defects in the aspect of pressure relief and explosion prevention of the power battery.

Disclosure of Invention

It is an object of the present invention to provide an improved power cell and corresponding vehicle, overcoming at least one of the disadvantages of the prior art.

According to a first aspect of the present invention, there is provided a power battery, wherein the power battery comprises: at least one cell; a housing having a receiving cavity for receiving the battery cell and having an opening; a closing member fixed to the housing by a connection structure and closing the opening; and an explosive disposed at the connecting structure and capable of being detonated to break the connecting structure such that the closure can be at least partially detached from the housing.

By detonating an explosive arranged at the connecting structure, the connecting structure between the closure and the housing can be actively broken, causing the closure to be at least partially detached from the housing. Therefore, the opening which is originally closed by the closing piece is opened, so that the gas in the shell of the power battery can be discharged in time through the opening, and the continuous and rapid rise of the temperature of the power battery and the serious explosion accident of the power battery caused by the accumulation of the high-temperature and high-pressure gas in the shell are prevented or delayed. This active venting approach can improve reliability. In this way, an opening having a large flow area can be easily opened.

In particular, the explosive power of the explosive substance need not be such as to be able to break the closure, but rather only so long as the connecting structure can be broken by the explosion of the explosive substance. This can improve safety on the one hand. On the other hand, arranging the explosive at the connecting structure can open the opening having a large flow area as reliably as possible with a reduced destructive force of the explosive, thereby improving reliability and pressure relief efficiency.

In one exemplary embodiment, an explosive is disposed between the enclosure and the housing. This facilitates breaking the connection between the closure and the housing by the impact force generated by the detonated explosive. In addition, the impact force can also be used to push the closure out of the housing.

In one exemplary embodiment, the housing is provided with a first recess at the location where it engages the closure, the explosive being at least partially disposed within the first recess; and/or the enclosure is provided with a second recess at the location where it engages the housing, the explosive being at least partially disposed within the second recess. This is advantageous for improving safety.

In one exemplary embodiment, the connecting structure includes a fastener for securing the enclosure to the housing, the explosive being disposed within the fastener. This facilitates reliable destruction of the connection between the closure and the housing by explosives.

In one exemplary embodiment, the closure is a functional component which assumes a function independent of the pressure relief of the power cell during operation of the power cell. Therefore, an opening is not required to be formed in the shell specially for active pressure relief, so that the structure of the power battery can be simplified, and the structural strength of the power battery can be prevented from being reduced. In the case of a power battery also provided with an explosion-proof valve, the combination of the functional component and the explosive substance can serve as a non-similar redundant design of the explosion-proof valve, thereby improving the safety of the power battery.

In one exemplary embodiment, the closure and the opening are provided at the bottom of the housing. This can further improve safety.

In one exemplary embodiment, the power cell further comprises an igniter connected to the controller for initiating the explosive in response to an initiation signal from the controller. Therefore, the reliability of pressure relief and explosion prevention can be improved.

In an exemplary embodiment, the power cell further comprises a temperature sensor for detecting a temperature within the power cell, the controller being connected to said temperature sensor and configured to be able to send a detonation signal to the igniter if the temperature detected by the temperature sensor exceeds a predetermined temperature threshold. Alternatively or additionally, the power cell further comprises an air pressure sensor for detecting air pressure within the power cell, the controller being connected to said air pressure sensor and configured to be able to send a firing signal to the igniter if the air pressure detected by the air pressure sensor exceeds a predetermined air pressure threshold.

In one exemplary embodiment, the controller sends a detonation signal to the igniter if the battery management system for the power cell identifies that thermal runaway has occurred in the power cell. In an exemplary embodiment, the power cell comprises an actuation mechanism for the closure member arranged to provide a force to drive the closure member out of the housing, wherein the actuation mechanism optionally comprises a spring connected between the closure member and the housing. This facilitates a reliable implementation of the active pressure relief.

In one exemplary embodiment, the power battery is a lithium ion battery.

According to a first aspect of the invention, a vehicle is provided, wherein the vehicle comprises a power cell according to the invention.

Drawings

The principles, features and advantages of the present invention may be better understood by describing the invention in more detail below with reference to the accompanying drawings. The drawings comprise:

fig. 1 and 2 schematically illustrate a power cell according to an exemplary embodiment of the present invention, wherein fig. 1 illustrates the power cell in a perspective view and fig. 2 illustrates the power cell in an exploded view;

FIG. 3 schematically illustratesbase:Sub>A partial cross-sectional view of the power cell shown in FIG. 1 through section A-A;

FIG. 4 schematically illustrates a partial cross-sectional view similar to FIG. 3 of a power cell according to another exemplary embodiment;

FIG. 5 schematically illustrates a partial cross-sectional view similar to FIG. 3 of a power cell according to another exemplary embodiment;

FIG. 6 schematically illustrates a partial cross-sectional view of the power cell shown in FIG. 1 through section B-B;

fig. 7 schematically shows a partial cross-sectional view of a power cell according to an exemplary embodiment of the invention;

fig. 8 schematically shows a partial cross-sectional view of a power cell according to an exemplary embodiment of the invention; and

fig. 9 schematically shows a vehicle according to an exemplary embodiment of the invention.

List of reference numerals

1. Power battery

10. Electric core

20. Shell body

21. Containing cavity

22. Opening of the container

23. Box body

24. Top cover

25. A first concave part

30. Closure member

31. Second concave part

301. Maintenance window cover

302. Low-voltage plug

40. Explosive material

50. Connection structure

51. Fastening piece

60. Igniter

70. Actuating mechanism

71. Spring

72. Spring cavity

2. Controller

100. Vehicle with a steering wheel

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.

Fig. 1 and 2 schematically show a power cell 1 according to an exemplary embodiment of the present invention, wherein fig. 1 shows the power cell 1 in a perspective view and fig. 2 shows the power cell 1 in an exploded view. The power battery 1 can be used, for example, to power an electric vehicle. It should be understood that the power battery 1 may be a power battery 1 for powering various mechanical devices, for example, which may power various vehicles or construction tools, etc. The vehicle may comprise, for example, a vehicle, a watercraft, or an aircraft, among others. The power cell 1 may be embodied as a battery, in particular a lithium ion battery.

As shown in fig. 1 and 2, the power battery 1 may include: at least one battery cell 10; a casing 20 having a housing cavity 21 for housing the battery cell 10 and having an opening 22; a closure 30 fixed to the housing 20 by a connection structure 50 and closing the opening 22; and an explosive 40 arranged at the connecting structure 50 and capable of being detonated to break said connecting structure 50 such that the closure 30 can be at least partially detached from the housing 20.

By detonating the explosive 40 arranged at the connecting structure 50, the connecting structure 50 between the closure 30 and the housing 20 can be actively broken, causing the closure 30 to be at least partially detached from the housing 20. Thus, the opening 22, which is originally closed by the closing member 30, is opened, so that the gas in the housing 20 of the power battery 1 can be discharged through the opening 22 in time, thereby preventing or delaying the continuous and rapid rise of the temperature of the power battery 1 and causing a serious battery explosion accident due to the accumulation of the high-temperature and high-pressure gas in the housing 20. Here, "arranged at the connecting structure" means that the explosive 40 can be integrated into the connecting structure 50 or arranged next to the connecting structure 50, for example. The explosive power of the explosive 40 need not be to the extent that it can break the closure 30, but rather only that the connecting structure 50 can be broken by the explosion of the explosive 40. This can improve safety on the one hand. On the other hand, arranging the explosive 40 at the connecting structure 50 can open the opening 22 having a large flow area as reliably as possible with a reduction in the destructive force of the explosive 40, thereby improving reliability and pressure relief efficiency.

The explosive 40 may include ammonium nitrate, for example. In other embodiments, other suitable explosives 40 may be employed.

As shown in fig. 2, the housing 20 may include, for example, a case 23 and a top cover 24. The battery cells 10 may be disposed within the case 23. The top cover 24 may be fixed to the case 23 from above. The power battery 1 may include a plurality of battery cells 10, where the battery cells 10 may be arranged in the form of a module in the box 23, or the battery cells 10 may also be arranged directly in the form of a module-free in the box 23. In further embodiments, the housing 20 may also include a base plate and a generally basin-shaped enclosure disposed above the base plate.

Alternatively, the closure 30 is a functional component which assumes a function independent of the pressure relief of the power cell 1 during operation of the power cell 1. For example, the functional components may include a high voltage plug, a low voltage plug, or a service window cover 301, among others. The functional component may assume its own function during normal operation of the power cell 1, for example a high voltage plug may be used for electrical connection with an external device in order to supply power to the external device. In the event of thermal runaway or thermal runaway of the power cell 1, the functional component may also assume the function of active pressure relief together with the explosive 40. Therefore, it is not necessary to provide an opening in the case 20 exclusively for active pressure relief, so that the structure of the power battery 1 can be simplified and the structural strength of the power battery 1 can be prevented from being reduced.

Under the condition that the power battery 1 is further provided with an explosion-proof valve, the combination of the functional components and the explosive 40 can bear the pressure relief function together with the explosion-proof valve, so that the pressure relief efficiency is improved, and the pressure relief and explosion prevention can be performed as the non-similar redundancy design of the explosion-proof valve under the condition that the explosion-proof valve cannot be normally opened, so that the safety of the power battery 1 is improved.

In further embodiments, the opening 22 may be an opening dedicated to active pressure relief and the closure 30 may be a closure dedicated to active pressure relief. Thereby, the position of the opening 22 and the closure 30 in the housing 10 may be more flexible.

In the embodiment shown in fig. 1 and 2, the closing member 30 is a service window cover 301, and the opening 22 closed by the closing member 30 is a service window. The maintenance window cover 301 may be fixed to the housing 20 by a fastener 51 such as a screw, for example. Here, the connecting structure 50 may include, for example, a fastener 51 and a through hole and/or a threaded hole formed in the closure 30 and/or the housing 20. As can be seen from fig. 2, once the explosive 40 is detonated and breaks the connecting structure 50, the service window cover 301 may be detached from the housing 20 by the high-pressure gas inside the housing 20. In this case, a maintenance window having a large flow area will be opened. The gas within the housing 20 may be vented through the service window. Thus, efficient pressure relief can be achieved. If the maintenance window cover 301 is directly blasted with the explosive 40 having the same destructive power, the area of the vent hole generated in the maintenance window cover 301 will be smaller than the area of the maintenance window.

As shown in fig. 2, explosives 40 may be disposed between the enclosure 30 and the housing 20, for example. This facilitates breaking the connection 50 between the closure 30 and the housing 20 by the impact force generated by the detonated explosive 40. In addition, the impact force may also be used to push the closure 30 off of the housing 20.

Fig. 3 schematically showsbase:Sub>A partial cross-sectional view of the power cell 1 shown in fig. 1 through the sectionbase:Sub>A-base:Sub>A.

As can be seen in connection with fig. 2 and 3, the housing 20 may be provided with a first recess 25 at the location where it engages the closure 30. Explosive 40 may be disposed within first recess 25. The first recess 25 may be provided, for example, adjacent to a screw for fixing the closure 30.

Fig. 2 shows, by way of example, that the housing 20 is provided with two separate first recesses 25, which are located respectively in the vicinity of a pair of mutually opposite edges of the opening 22. In further embodiments, the first recess 25 may be provided in other forms, for example, may completely surround the opening 22.

Fig. 3 shows that the power cell 1 for example further comprises an igniter 60, said igniter 60 being connected to the controller 2 for igniting the explosive 40 in response to an ignition signal issued by the controller 2. The igniter 60 may be implemented as a spark igniter, a heated igniter, or the like, for example. It is to be understood that the invention is not limited to the particular type or configuration of the igniter 60, so long as it is capable of detonating the explosive 40. The controller 2 may be a vehicle controller for a vehicle or may be a dedicated controller. Thus, explosives 40 may be actively detonated by a detonation signal from controller 2 to achieve active pressure relief, if appropriate. Therefore, the reliability of pressure relief and explosion prevention can be improved.

In an exemplary embodiment, the controller 2 sends a detonation signal to the igniter 60 in the event that the battery management system for the power cell 1 recognizes that thermal runaway occurs in the power cell 1. Compared with the passive pressure relief realized by means of high-pressure gas in the shell, the method enables the power battery to realize active pressure relief more accurately and timely according to the state of the battery. The controller 2 may be implemented, for example, as part of a battery management system. Alternatively, the controller 2 may be communicatively coupled to the battery management system. When the battery management system detects that the power battery 1 has thermal escape and explosion risks, reminding information can be sent to people in the vehicle through user interaction equipment of the vehicle, such as a display screen or a voice system, so as to remind the people in the vehicle to leave the vehicle as soon as possible. In addition, the battery management system or the vehicle controller may send alarm information to a remote device, such as a backend server, through remote communication. For example, the alert message may be sent to the vehicle host plant via remote communication.

In an exemplary embodiment, the power cell 1 further comprises a temperature sensor for detecting the temperature inside the power cell 1, for example. The controller 2 may be connected to the temperature sensor and configured to be able to send a detonation signal to the igniter 60 in case the temperature detected by the temperature sensor exceeds a predetermined temperature threshold. For example, in the case where thermal runaway occurs in one of the battery cells 10 of the power battery 1 and causes a local temperature increase of the power battery 1, even if the thermal runaway does not cause an increase in the air pressure inside the power battery 1, a detonation signal may be triggered by the temperature sensor to detonate the explosive 40, thereby achieving active pressure relief.

Alternatively or additionally, the power cell 1 comprises an air pressure sensor for detecting the air pressure inside the power cell 1. The controller 2 may be connected to the air pressure sensor and configured to be able to send a detonation signal to the igniter 60 if the air pressure detected by the air pressure sensor exceeds a predetermined air pressure threshold. In addition, the controller 2 may also be connected to other sensors for detecting the state of the power battery 1 so as to generate a detonation signal according to the state of the power battery 1 and send the detonation signal to the igniter 60. Therefore, even if the battery management system cannot work normally, the controller 2 can directly monitor the state of the power battery 1 and timely trigger the explosive 40 to explode so as to realize pressure relief.

In addition, the explosive 40 may be directly detonated by high temperature caused by thermal runaway or thermal runaway of the power battery 1, for example. For example, explosives 40 may be detonated at a predetermined detonation temperature. The predetermined detonation temperature is for example between 300 ℃ and 400 ℃.

Fig. 4 schematically shows a partial cross-sectional view similar to fig. 3 of a power cell 1 according to another exemplary embodiment. As shown in fig. 4, the closure 30 may be provided with a second recess 31 at a location where it engages the housing 20. Explosive 40 may be disposed within second recess 31.

Fig. 5 schematically shows a partial cross-sectional view similar to fig. 3 of a power cell 1 according to another exemplary embodiment. In this embodiment, the housing 20 is provided with a first recess 25 at the location where it engages the closure 30. The closure 30 is provided with a second recess 31 at the location where it engages the housing 20. The first recess 25 is opposite to the second recess 31 and together encloses a chamber for containing an explosive 40.

By disposing the explosive 40 in the first recess 25 and/or the second recess 31, the explosive 40 can be stably and safely disposed, thereby preventing the explosive 40 from being accidentally detonated due to crushing or collision, or the like.

As described above, when the connecting structure 50 between the closing member 30 and the housing 20 is broken by the explosion of the explosive 40, the closing member 30 can be detached from the housing 20 by the impact force of the explosion. The closure 30 may also be disengaged from the housing 20 by the high pressure gas within the housing 20 after the connection 50 between the closure 30 and the housing 20 is broken by the explosion of the explosive 40. Alternatively or additionally, the power cell 1 may comprise an actuation mechanism 70 for the closure 30, which is arranged to be able to provide a force that drives the closure 30 out of the housing 20. For example, the undamaged connecting structure 50 can secure the closure 30 to the housing 20 against the force provided by the actuation mechanism 70 to drive the closure 30 away from the housing 20. However, after the connection structure 50 is broken, the actuating mechanism 70 will drive the closure 30 out of the housing 20. This facilitates a reliable implementation of the active pressure relief.

Fig. 6 schematically shows a partial cross-sectional view through section B-B (see fig. 1) of a power cell 1 according to an exemplary embodiment of the invention.

As shown in fig. 6, the power cell 1 may comprise an actuation mechanism 70 for the closure 30 arranged to provide a force to drive the closure 30 out of the housing 20. The actuating mechanism 70 may, for example, comprise a spring 71, the spring 71 being connected between the closure 30 and the housing 20.

In this embodiment, the housing 20 is provided with a spring cavity 72 for accommodating the spring 71. A spring 71 is located within the spring cavity 72 and is connected at one end to the housing 20 and at the other end to the closure 30. The spring 71 is shown in a compressed state in fig. 6. In this state, the spring 71 provides an urging force that urges the closing member 30 in a direction away from the housing 20. The closure 30 is fixed to the housing 20 by screws. In other words, the screws fix the closure 30 to the housing 20 against the thrust provided by the springs 71. If the explosive 40 is detonated and breaks the connection 50 between the closure 30 and the housing 20 (e.g. breaking screws or threaded holes through which screws pass, etc.), the closure 30 will disengage from the housing 20 under the urging of the spring 71 in the event that the restraining force of the screws is lost.

In further embodiments, the spring 71 may also be arranged to enable the closure 30 to be disengaged from the housing 20 by a pulling force. Alternatively, the actuation mechanism 70 may be embodied in other forms. For example, the actuating mechanism 70 may include an actuating member made of a material that can be deformed or expanded by heat, or the like.

Fig. 7 schematically shows a partial cross-sectional view of a power cell 1 according to an exemplary embodiment of the invention. In this embodiment, the power battery 1 has a structure similar to that of the power battery 1 shown in fig. 1. Except that in the embodiment shown in fig. 7, explosive 40 is disposed within fasteners 51 used to secure enclosure 30 to housing 20. The fasteners 51 may include, for example, screws, bolts, nuts, and the like. The fastening element 51 is embodied here as a screw. The explosive 40 is arranged, for example, in the shank of a screw. The screw can be destroyed directly by the explosion of the explosive 40, so that the connection 50 between the closure 30 and the housing 20 can be reliably destroyed.

Fig. 8 schematically shows a partial cross-sectional view of a power cell 1 according to an exemplary embodiment of the invention. Fig. 8 shows by way of example that the power cell 1 comprises a low-voltage plug 302, which is used here as the closure element 30. The low voltage plug 302 is secured to the housing 20 by a plurality of fasteners 51 (screws). Explosive 40 may be disposed within at least one of the plurality of fasteners 51, for example.

As shown in fig. 1 and 8, the closure 30 and the opening 22 may be disposed at the top or side of the housing 20. In further embodiments, the closure 30 and the opening 22 may be disposed at the bottom of the housing 20. Thus, when the pressure is released through the opening 22, the high-temperature gas in the case 20 can flow out from the bottom through the opening 22. This can improve safety.

Where the closure 30 and the opening 22 are provided at the bottom of the housing 20, the opening 22 may be, in particular, an opening dedicated to active pressure relief, and the closure 30 may be, in particular, a closure dedicated to active pressure relief.

Fig. 9 schematically shows a vehicle 100 according to an exemplary embodiment of the invention. The vehicle 100 includes a power battery 1 according to an exemplary embodiment of the invention. Typically, the power battery 1 is arranged at the bottom of the vehicle 100. In this case, venting from the bottom of the housing 20 is particularly advantageous for increased safety.

As shown in fig. 9, the power battery 1 may be arranged to be at least partially located below the passenger compartment of the vehicle 100. Therefore, the pressure relief from the bottom of the housing 20 prevents injury to the vehicle occupant through the high-temperature and high-pressure gas from inside the housing 20. It should be understood that the power cell 1 may also be arranged at other locations.

It is to be understood that, herein, the expressions "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance, nor are they to be construed as implicitly indicating the number of technical features indicated. A feature defined as "first" or "second" may be explicitly or implicitly indicated as including at least one of the feature. As used herein, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

It should be understood that in this context expressions relating to orientation, such as "bottom", "top", etc., are in relation to the state of use of the power cell.

Although specific embodiments of the invention have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications may be devised without departing from the spirit and scope of the present invention.

Claims

1. A power cell, wherein the power cell (1) comprises:

at least one electrical core (10);

a housing (20) having a receiving space (21) for receiving the battery cell (10) and having an opening (22);

a closure (30) secured to the housing (20) by a connecting structure (50) and closing the opening (22); and

an explosive (40) arranged at the connecting structure (50) and capable of being detonated to break the connecting structure (50) such that the enclosure (30) is at least partially disengageable from the housing (20).

2. The power cell of claim 1,

an explosive (40) is arranged between the enclosure (30) and the housing (20).

3. The power cell of claim 2,

the housing (20) is provided with a first recess (25) at the location where it engages the closure (30), the explosive (40) being arranged at least partially within the first recess (25); and/or

The closure (30) is provided with a second recess (31) at the location where it engages the housing (20), the explosive (40) being arranged at least partially within the second recess (31).

4. The power cell of claim 1,

the connecting structure (50) comprises a fastener (51) for fixing the enclosure (30) to the housing (20), the explosive (40) being arranged within the fastener (51).

5. The power cell of any of claims 1-4,

the closure (30) is a functional component which, during operation of the power cell (1), assumes a function which is independent of the pressure release of the power cell (1), wherein the functional component optionally comprises a service window cover (301), a low-pressure plug (302) or a high-pressure plug; and/or

A closure (30) and an opening (22) are provided at the bottom of the housing (20).

6. The power cell of any of claims 1-5,

the power cell (1) further comprises an igniter (60) connected to the controller (2) for igniting the explosive (40) in response to an ignition signal emitted by the controller (2).

7. The power cell of claim 6,

the power battery (1) further comprises a temperature sensor for detecting the temperature inside the power battery (1), the controller (2) being connected to said temperature sensor and configured to be able to send a detonation signal to the igniter (60) in case the temperature detected by the temperature sensor exceeds a predetermined temperature threshold; and/or

The power cell (1) further comprises an air pressure sensor for detecting air pressure within the power cell (1), the controller (2) being connected to said air pressure sensor and configured to be able to send a detonation signal to the igniter (60) in case the air pressure detected by the air pressure sensor exceeds a predetermined air pressure threshold; and/or

The controller (2) transmits a detonation signal to the igniter (60) when the battery management system for the power battery (1) recognizes that thermal runaway is occurring in the power battery (1).

8. The power cell of any of claims 1-7,

the power cell (1) comprises an actuating mechanism (70) for the closure (30) arranged to be able to provide a force to drive the closure (30) out of the housing (20), wherein the actuating mechanism (70) optionally comprises a spring (71), said spring (71) being connected between the closure (30) and the housing (20).

9. The power cell of any of claims 1-8,

the power battery (1) is a lithium ion battery.

10. A vehicle, wherein the vehicle (100) comprises a power cell (1) according to any of claims 1-9.