Batteries and power consuming devices

Abstract

Embodiments of the present application provide batteries and power consuming devices that can enhance the safety performance of the batteries. The battery 10 includes a plurality of battery cells 20, at least one of which has a first pressure release mechanism 213, a housing 110 having a second pressure release mechanism 113, and an enclosure mechanism 30 that surrounds a first exhaust space 310 corresponding to the first pressure release mechanism 213 of at least one battery cell 20 to form the first exhaust space 310 and has an opening 301 that communicates with the first exhaust space 310, wherein when the first pressure release mechanism 213 is activated, exhaust from the at least one battery cell 20 enters the first exhaust space 310 from the first pressure release mechanism 213 and is discharged to the second pressure release mechanism 113 through the opening 301, and the minimum length of the exhaust path between the first pressure release mechanism 213 and the second pressure release mechanism 113 is greater than the shortest distance between the first pressure release mechanism 213 and the second pressure release mechanism 113.

Description

[Technical field]

[0001] TECHNICAL FIELD Embodiments of the present application relate to the field of batteries, and more specifically, to batteries and power consuming devices. [Background technology]

[0002] With the development of the times, electric vehicles have huge market potential due to their advantages such as high environmental protection, low noise and low usage costs, and can effectively promote energy conservation and reduce pollutant emissions, which is beneficial to the development and progress of society. Battery technology is a key factor in the development of electric vehicles. Summary of the Invention [Problem to be solved by the invention]

[0003] In the development of battery technology, in addition to improving battery performance, safety issues are also one of the issues that cannot be ignored. If the safety issues of a battery cannot be secured, the battery cannot be used. Therefore, how to strengthen the safety of the battery is one of the technical issues in battery technology that needs to be solved as soon as possible. [Means for solving the problem]

[0004] The present application provides a battery and a power consuming device that can enhance the safety performance of the battery.

[0005] According to a first aspect, a battery is provided, comprising: a plurality of battery cells, at least one of which has a first pressure release mechanism; a housing used to accommodate the plurality of battery cells and having a second pressure release mechanism; and an enclosure mechanism used to surround a first exhaust space corresponding to the first pressure release mechanism of at least one battery cell to form the first exhaust space and having an opening communicating with the first exhaust space, wherein, when the first pressure release mechanism is activated, exhaust from the at least one battery cell enters the first exhaust space from the first pressure release mechanism and is discharged to the second pressure release mechanism through the opening, and the minimum length of the exhaust path between the first pressure release mechanism and the second pressure release mechanism is greater than the shortest distance between the first pressure release mechanism and the second pressure release mechanism.

[0006] According to the technical proposal of the embodiment of the present application, by installing an enclosure mechanism, the discharge path of the discharged material inside the battery housing can be extended, and the minimum length of this discharge path can be made greater than the shortest distance between the first pressure release mechanism and the second pressure release mechanism, thereby reducing the temperature of the discharged material inside the housing, and reducing the temperature when it is discharged to the outside from the battery housing through the second pressure release mechanism, thereby improving the safety performance of the battery.

[0007] In some possible embodiments, the opening is located in the enclosure mechanism away from the second pressure relief mechanism.

[0008] According to the technical solution of this embodiment, by locating the opening at a position away from the second pressure release mechanism in the enclosing mechanism, the distance between the opening and the second pressure release mechanism can be increased, thereby further extending the discharge path of the battery cell exhaust material inside the battery housing, and further reducing the temperature of the exhaust material when it reaches the second pressure release mechanism, thereby improving the safety performance of the battery.

[0009] In some possible embodiments, the opening faces a housing wall other than the housing wall in which the second pressure relief mechanism is located.

[0010] According to the technical solution of this embodiment, the opening of the enclosure mechanism can be designed according to the installation of the second pressure release mechanism of the housing, thereby ensuring that the opening does not face the housing wall where the second pressure release mechanism is located, and increasing the distance between the opening and the second pressure release mechanism, thereby further extending the discharge path of the battery cell exhaust inside the battery housing, and further reducing the temperature when the exhaust reaches the second pressure release mechanism, thereby improving the safety performance of the battery.

[0011] In some possible embodiments, the opening is located in a central region of the housing.

[0012] According to the technical solution of this embodiment, the opening of the enclosure mechanism is located in the central region of the housing, and the distance between the opening and the second pressure relief mechanism located on the housing wall of the housing can be increased, thereby extending the discharge path of the battery cell exhaust inside the battery housing, further reducing the temperature when the exhaust reaches the second pressure relief mechanism, and improving the safety performance of the battery.

[0013] In some possible embodiments, the number of enclosure mechanisms is multiple, and the multiple enclosure mechanisms are spaced apart.

[0014] According to the technical solution of this embodiment, multiple enclosure mechanisms are installed in the battery housing, and these multiple enclosure mechanisms can be flexibly installed and adjusted according to actual needs, thereby playing a better guiding role for the discharge of battery cells at different positions in the housing, and further improving the safety performance of the entire battery.

[0015] In some possible embodiments, the openings of two adjacent enclosure features of the plurality of enclosure features are located on two adjacent walls of the two adjacent enclosure features, and the openings of the two adjacent enclosure features are offset from each other.

[0016] According to the technical solution of this embodiment, the openings of adjacent enclosing mechanisms among the multiple enclosing mechanisms are offset from each other, thereby preventing the high-temperature exhaust of the battery cell received in the first exhaust space formed by one enclosing mechanism from affecting or damaging the battery cells corresponding to other adjacent enclosing mechanisms on a wider scale, preventing the pressure in the first exhaust space from becoming too high, and ensuring the safety performance of the battery.

[0017] In some possible embodiments, a first pressure relief mechanism is installed on the first wall of the at least one battery cell, the first wall of the at least one battery cell and a first housing wall of the housing are installed opposite each other, and the enclosure mechanism is installed between the first housing wall and the first wall of the at least one battery cell.

[0018] The technical solution of this embodiment makes it easy to install and attach the enclosure mechanism between the first housing wall and the first wall of the at least one battery cell, and the enclosure mechanism easily surrounds the space corresponding to the first pressure relief mechanism of the at least one battery cell to form a first exhaust space.

[0019] In some possible embodiments, the enclosure mechanism is attached to the first housing wall and the first wall of the at least one battery cell, and the second pressure relief mechanism is installed on another housing wall of the housing other than the first housing wall.

[0020] The technical solution of this embodiment makes it easier to stably attach the enclosure mechanism to the housing, and makes it easier for the enclosure mechanism to guide the waste from the at least one battery cell in a predetermined direction, thereby extending the discharge path of the waste inside the housing, and improving the safety performance of the battery.

[0021] In some possible embodiments, the second housing wall of the housing intersects with the first housing wall of the housing, a second pressure relief mechanism is installed on the second housing wall, a second exhaust space is formed between the enclosure mechanism and the second housing wall, the second exhaust space is connected to the first exhaust space through an opening, and exhaust enters the second exhaust space through the opening and is discharged to the second pressure relief mechanism.

[0022] According to the technical solution of this embodiment, the enclosing mechanism isolates the first exhaust space and the second exhaust space inside the housing, and the second exhaust space is connected to the second housing wall of the housing, which makes it easier to design the position of the second pressure relief mechanism on the second housing wall of the housing, which is advantageous for further extending the exhaust path of the exhaust material inside the housing, and ensures the safety performance of the battery.

[0023] In some possible embodiments, at least one battery cell is arranged to form a battery cell sequence, and two electrode terminals are installed on a first wall of each battery cell in the battery cell sequence, a first pressure release mechanism is installed between the two electrode terminals, and an enclosure mechanism is installed between the two electrode terminals of each battery cell in the battery cell sequence.

[0024] According to the technical solution of this embodiment, since the distance between the enclosing mechanism and the first pressure release mechanism is short, the enclosing mechanism can provide a good barrier and guide the emissions discharged from the first pressure release mechanism, and prevent the emissions discharged from the first pressure release mechanism from affecting the electrode terminals or other components of the battery cell, thereby further ensuring the safety performance of the battery.

[0025] In some possible embodiments, an isolation member is installed between the first housing wall and the first wall of the at least one battery cell, the isolation member is used to form an electrical cavity and an exhaust cavity that are isolated from each other inside the housing, the electrical cavity is used to accommodate the at least one battery cell, and exhaust from the at least one battery cell is exhausted to the exhaust cavity through the isolation member, and an enclosure mechanism is installed in the exhaust cavity and attached to the isolation member and the first housing wall, and is used to enclose a first exhaust space corresponding to the first pressure relief mechanism of the at least one battery cell in the exhaust cavity to form the first exhaust space.

[0026] According to the technical solution of the embodiment of the present application, the housing is divided into an electrical cavity and an exhaust cavity which are isolated from each other by an isolating member, so that the exhaust of the battery cells in the electrical cavity is exhausted to the exhaust cavity through the isolating member, without directly affecting the electrical structure of the battery cells in the electrical cavity, thereby further improving the safety performance of the battery. Furthermore, the enclosure mechanism is installed in the exhaust cavity and used to guide the exhaust so that it can only be exhausted through the opening in the enclosure mechanism, thereby extending the exhaust path of the exhaust inside the housing, and further improving the safety performance of the battery.

[0027] In some possible embodiments, the second pressure relief mechanism is installed on a housing wall corresponding to the exhaust cavity of the housing.

[0028] The technical solution of the embodiment of the present application allows the exhaust to be easily discharged from the exhaust cavity, and the exhaust will not affect the electrical structure in the electrical cavity.

[0029] In some possible embodiments, the second pressure relief mechanism is installed on a housing wall other than the first housing wall of the housing.

[0030] According to the technical solution of the embodiments of the present application, the second pressure relief mechanism is not installed on the first housing wall but on another housing wall, which can extend the discharge path of the exhaust material inside the housing and thereby improve the safety of the battery.

[0031] In some possible embodiments, the isolation member is formed with a pressure relief area of ​​a first pressure relief mechanism corresponding to at least one battery cell, and exhaust from the at least one battery cell is discharged to the exhaust cavity through the pressure relief area, and the enclosure mechanism is used to surround a first exhaust space corresponding to the pressure relief area in the exhaust cavity to form the first exhaust space.

[0032] According to the technical solution of this embodiment, a pressure relief area is provided on the isolation member, so that the effluent discharged from the first pressure relief mechanism can be more effectively passed through and the effluent can be prevented from affecting the electrical components in the electrical cavity. The enclosure mechanism can enclose the space corresponding to the pressure relief area and indirectly enclose the space corresponding to the first pressure relief mechanism of the battery cell, thereby effectively guiding the effluent and comprehensively ensuring the safety performance of the battery.

[0033] In some possible embodiments, the isolation member is a thermal management member for regulating the temperature of the battery cells.

[0034] The technical solution of this embodiment multiplexes the thermal management member as an isolation member, thereby separating the electrical cavity and the exhaust cavity that are isolated from each other within the housing, thereby ensuring the safety of the battery; and the presence of the thermal management member can provide additional thermal management function to the battery cells, further improving the safety performance of the battery.

[0035] In some possible embodiments, the enclosure arrangement is formed with a first filter hole for filtering solid particles in the effluent.

[0036] According to the technical solution of this embodiment, the enclosure mechanism is provided with a first filter hole mainly for passing the gas in the exhaust, and the large solid particles in the exhaust can be filtered by the first filter hole and cannot be discharged to the outside of the first exhaust space through the first filter hole, so that the high-temperature solid particles discharged to the second pressure relief mechanism can be reduced and the safety of the battery can be further improved. In addition, the provision of the first filter hole in the enclosure mechanism can accelerate the exhaust speed and pressure relief speed of the first exhaust space and prevent the pressure in the first exhaust space from being too high. In addition, when the number of first filter holes is multiple, the airflows discharged from the multiple first filter holes can collide with each other to generate a certain turbulence, thereby reducing the harm caused by the direct collision of gas.

[0037] In some possible embodiments, the enclosure mechanism is an interrupted structure and is formed of a plurality of enclosure sections, and a first filter hole is formed in a gap between two adjacent enclosure sections of the plurality of enclosure sections.

[0038] According to the technical proposal of this embodiment, after forming the first filter hole, the processing convenience is improved by the interrupted design of the enclosing mechanism, and there is no need to integrally mold the enclosing mechanism. Instead, multiple enclosing sub-structures can be manufactured separately to form the enclosing mechanism.

[0039] In some possible embodiments, at least one of a filtering member, a gas absorbing member, and a cooling member is disposed in the exhaust path between the first pressure relief mechanism and the second pressure relief mechanism.

[0040] According to the technical solution of this embodiment, at least one of a filter member, a gas absorbing member and a cooling member is installed in the exhaust path, which can further reduce the hazard of the exhaust material discharged to the outside of the housing and improve the safety performance of the battery.

[0041] In some possible embodiments, the filtering member includes secondary filtering holes or folded airflow channels, which are used to filter solid particles in the exhaust.

[0042] According to the technical solution of this embodiment, the second filter hole or the folded airflow channel is easy to realize and can play a good role in filtering solid particles.

[0043] In some possible embodiments, the gas absorbing member is formed of a gas absorbing material for absorbing combustible gases in the exhaust.

[0044] According to the technical solution of this embodiment, the gas absorbing member is easy to realize and can absorb the combustible gas in the exhaust, preventing the safety risk to the battery caused by the combustible gas.

[0045] In some possible embodiments, the cooling member is formed of a heat absorbing material for absorbing heat from the effluent and cooling the effluent.

[0046] According to the technical solution of this embodiment, the cooling member is easy to implement, and can absorb heat from the exhaust material to cool it, thereby further reducing the temperature at which the exhaust material is discharged outside the housing, thereby improving the safety performance of the battery.

[0047] In some possible embodiments, the maximum temperature T1 of the effluent in the first pressure relief mechanism and the maximum temperature T2 of the effluent in the second pressure relief mechanism satisfy the relationship T1-T2≧300°C.

[0048] According to the technical solution of this embodiment, the waste material discharged from the battery cell through the first pressure relief mechanism passes through a long discharge path inside the housing, and reaches the second pressure relief mechanism at a temperature that is significantly reduced compared to the temperature in the first pressure relief mechanism, thereby preventing safety risks caused by discharging the waste material outside the battery.

[0049] In some possible embodiments, the maximum temperature T2 in the second exhaust pressure relief mechanism is ≦300° C.

[0050] According to the technical solution of this embodiment, the waste material discharged from the battery cell through the first pressure relief mechanism passes through a long discharge path inside the housing and reaches the second pressure relief mechanism at a lower temperature, thereby more reliably preventing safety risks caused by the waste material being discharged outside the battery and ensuring the safety performance of the battery.

[0051] In some possible embodiments, the melting point of the material of the enclosure is 200° C. or higher.

[0052] The technical solution of this embodiment enables the enclosure mechanism to resist the impact of high-temperature exhaust gas discharged from the battery cells, thereby preventing the high-temperature exhaust gas from affecting the reliability of use of the enclosure mechanism, and comprehensively ensuring the safety performance of the battery.

[0053] According to a second aspect, there is provided a power consumption device comprising a battery of the first aspect or any possible embodiment of the first aspect, the battery being adapted to provide electrical energy.

[0054] According to the technical proposal of the embodiment of the present application, by installing an enclosure mechanism, the discharge path of the discharged material inside the battery housing can be extended, and the minimum length of this discharge path can be made greater than the shortest distance between the first pressure release mechanism and the second pressure release mechanism, thereby reducing the temperature of the discharged material inside the housing, and reducing the temperature when it is discharged to the outside from the battery housing through the second pressure release mechanism, thereby improving the safety performance of the battery. [Brief description of the drawings]

[0055] In order to more clearly describe the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application. It is obvious that the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without making creative efforts.

[0056] [Figure 1] 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application. [Diagram 2] FIG. 1 is a structural schematic diagram of a battery according to an embodiment of the present application. [Diagram 3] 1 is a structural schematic diagram of a battery cell according to an embodiment of the present application; [Figure 4] FIG. 1 is a structural schematic diagram of a battery according to an embodiment of the present application. [Diagram 5] FIG. 2 is another structural schematic diagram of a battery according to an embodiment of the present application. [Figure 6] FIG. 2 is another structural schematic diagram of a battery according to an embodiment of the present application. [Figure 7] FIG. 2 is another structural schematic diagram of a battery according to an embodiment of the present application. [Figure 8] FIG. 2 is a schematic exploded structural view of a battery according to an embodiment of the present application. [Figure 9]FIG. 9 is a schematic plan view of the battery in FIG. 8. [Figure 10] FIG. 2 is another exploded structural schematic diagram of a battery according to an embodiment of the present application. [Figure 11] FIG. 11 is a schematic plan view of the battery in FIG. [Figure 12] FIG. 2 is another exploded structural schematic diagram of a battery according to an embodiment of the present application. [Figure 13] FIG. 13 is a schematic bottom view of the battery in FIG. 12. [Figure 14] 1A-1D are two schematic structural diagrams of an enclosure mechanism enclosing a pressure relief area according to an embodiment of the present application. [Figure 15] 1A-1C are another two schematic structural diagrams of a battery according to an embodiment of the present application.

[0057] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0058] The following describes the embodiments of the present application in more detail in conjunction with the drawings and examples. The detailed description of the embodiments and the drawings are for illustrative purposes only to explain the principles of the present application, but are not intended to limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0059] In the description of this application, it should be explained that, unless otherwise stated, the meaning of "plurality" is two or more, and the orientation or positional relationship indicated by the terms "up", "down", "left", "right", "inside", "outside", etc. is merely for the convenience and simplification of the description of this application, and does not indicate or imply that the referenced device or element has a particular orientation or must be configured and operated in a particular orientation, and should not be understood as a limitation on this application.

[0060] The term "and / or" in this application merely describes the relationship between related objects and indicates that three relationships may exist, for example, A and / or B may represent three cases: A, a combination of A and B, and B. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "or" relationship.

[0061] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art in the technical field of this application, and the terms used in the specification of this application are only for describing specific embodiments and are not intended to limit this application, and the terms "comprises" and "has" and any variations thereof in the specification, claims, and above description of the drawings of this application are intended to cover non-exclusive "comprises". The terms "first", "second", "third", etc. in the specification, claims, or drawings of this application are not intended to describe a specific order or subordinate relationship, but are intended to distinguish different objects.

[0062] An "embodiment" referred to in this application means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly or implicitly, that the embodiments described in this application can be combined with other embodiments.

[0063] In the new energy field, batteries are the main power source for power consumption devices such as electric vehicles, ships, or spacecraft, and their importance goes without saying. In this application, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. The battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells. Optionally, the battery referred to in this application is also called a battery pack.

[0064] Alternatively, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the embodiment of the present application is not limited thereto. The battery cell may have a cylindrical, flat, rectangular, or other shape, etc., and the embodiment of the present application is not limited thereto. Battery cells are generally divided into three types according to the packaging method, namely, a cylindrical battery cell, a rectangular battery cell, and a pouch battery cell, and the embodiment of the present application is not limited thereto.

[0065] The development of battery technology requires simultaneous consideration of a wide range of design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charge / discharge ratio, as well as battery safety.

[0066] For batteries, the main safety hazard is caused by the charging and discharging process, and in order to improve the safety performance of the battery, a pressure relief mechanism is generally installed on the battery cell. The pressure relief mechanism is an element or member that operates to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. The predetermined threshold can be adjusted according to design needs. The predetermined threshold can be determined by one or more materials of the positive electrode sheet, the negative electrode sheet, the electrolyte, and the separator in the battery cell. The pressure relief mechanism can use, for example, a pressure-sensitive or temperature-sensitive element or member, that is, the pressure relief mechanism operates to form a channel for releasing the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. After the pressure relief mechanism is operated, the high-temperature and high-pressure material inside the battery cell is discharged out of the pressure relief mechanism as a discharge. In this manner, pressure relief can occur in the battery cell when the pressure or temperature is controllable, thereby avoiding the occurrence of a potential more serious accident. Here, the discharged matter from the battery cell includes, but is not limited to, high-temperature and high-pressure gas generated by the reaction, electrolyte, dissolved or split positive and negative electrode sheets, separator fragments, flames, etc.

[0067] However, as the energy density of the battery system increases, the temperature, velocity, and proportion of solid particles in the exhaust from the battery cell all increase significantly. If the exhaust operation and path are not properly designed, the hot exhaust is likely to cause an ignition event when it is exhausted outside the housing and encounters oxygen, posing a significant safety risk.

[0068] Therefore, the present application provides a battery including a plurality of battery cells, a housing, and an enclosure mechanism, where at least one of the plurality of battery cells has a first pressure relief mechanism. The housing is used to accommodate the plurality of battery cells, and has a second pressure relief mechanism. The enclosure mechanism is used to surround a first exhaust space corresponding to the first pressure relief mechanism of the at least one battery cell to form the first exhaust space, and the enclosure mechanism is provided with an opening communicating with the first exhaust space, and when the first pressure relief mechanism is activated, the exhaust of the at least one battery cell enters the first exhaust space from the first pressure relief mechanism and is discharged to the second pressure relief mechanism through the opening, and the minimum length of the exhaust path between the first pressure relief mechanism and the second pressure relief mechanism is greater than the minimum distance between the first pressure relief mechanism and the second pressure relief mechanism.

[0069] According to this technical solution, an enclosure mechanism is installed in the battery, and a first exhaust space surrounded by the enclosure mechanism can receive the exhaust discharged from the at least one battery cell through the first pressure relief mechanism, and the enclosure mechanism is provided with an opening communicating with the first exhaust space, and the exhaust can be discharged to the second pressure relief mechanism of the housing through the opening. The minimum length of the exhaust path between the first pressure relief mechanism and the second pressure relief mechanism of the exhaust is greater than the shortest distance between the first pressure relief mechanism and the second pressure relief mechanism. Therefore, by installing the enclosure mechanism in the embodiment of the present application, the enclosure mechanism can extend the exhaust path of the exhaust inside the battery housing, and the minimum length of the exhaust path can be greater than the shortest distance between the first pressure relief mechanism and the second pressure relief mechanism, thereby reducing the temperature of the exhaust inside the housing, and reducing the temperature when the exhaust is discharged to the outside from the battery housing through the second pressure relief mechanism, thereby improving the safety performance of the battery.

[0070] The technical solutions described in the embodiments of the present application are all applicable to various devices that use batteries, such as battery-powered vehicles, power tools, electric vehicles, ships, and spacecraft, including, for example, airplanes, rockets, space shuttles, and spaceships.

[0071] It should be understood that the technical solutions described in the embodiments of the present application are not only applicable to the devices described above, but also to all devices that use batteries. For the sake of brevity, however, the following embodiments will be described using an electric vehicle as an example.

[0072] For example, as shown in FIG. 1, a structural schematic diagram of a vehicle 1 according to an embodiment of the present application, the vehicle 1 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range extender vehicle, etc. A motor 11, a controller 12 and a battery 10 may be installed inside the vehicle 1, and the controller 12 is used to control the battery 10 to power the motor 11. For example, the battery 10 may be installed at the bottom, front or rear of the vehicle 1. The battery 10 can be used to power the vehicle 1, for example, as an operating power source for the vehicle 1, and for the circuit system of the vehicle 1, such as the startup, navigation and operating power consumption demand during driving of the vehicle 1. In another embodiment of the present application, the battery 10 can be used not only as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, to provide driving power to the vehicle 1 instead of fuel oil or natural gas, or instead of a part thereof.

[0073] In order to meet different power usage demands, a battery may include multiple battery cells, where the multiple battery cells may be connected in series, in parallel, or in series-parallel, where the series-parallel connection is a mixture of the series and parallel connections. The battery is also called a battery pack. Alternatively, multiple battery cells may be connected in series, in parallel, or in series-parallel to form a battery module, and then multiple battery modules may be connected in series, in parallel, or in series-parallel to form a battery. That is, the multiple battery cells may directly form a battery, or may form a battery module, and then the battery module may form a battery.

[0074] For example, as shown in FIG. 2, which is a structural schematic diagram of a battery 10 according to an embodiment of the present application, the battery 10 may include a plurality of battery cells 20. The battery 10 may further include a housing 110 (also called a cover body), the inside of the housing 110 is a hollow structure, and the plurality of battery cells 20 are accommodated in the housing 110. As shown in FIG. 2, the housing 110 may include two parts, respectively called a first part 111 and a second part 112, and the first part 111 and the second part 112 are engaged with each other. The shapes of the first part 111 and the second part 112 may be determined according to the combined shape of the plurality of battery cells 20, and both the first part 111 and the second part 112 may have one opening. For example, the first part 111 and the second part 112 may each be a hollow rectangular parallelepiped with only one open surface, with the opening of the first part 111 and the opening of the second part 112 disposed opposite each other, and the first part 111 and the second part 112 engaged with each other to form a housing 110 having a sealed chamber. A plurality of battery cells 20 are combined in parallel, series, or series-parallel connection with each other, and then placed in the housing 110 formed after the first part 111 and the second part 112 are engaged with each other.

[0075] Optionally, the battery 10 may further include other structures, which will not be described in detail here. For example, the battery 10 may further include a busbar member for realizing an electrical connection between the multiple battery cells 20, such as a parallel connection, a series connection, or a series-parallel connection. Specifically, the busbar member can be connected to the electrode terminals of the battery cells 20 to realize the electrical connection between the battery cells 20. Furthermore, the busbar member may be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can further be conducted out of the housing by a conductive mechanism. Optionally, the conductive mechanism also belongs to the busbar member.

[0076] The number of battery cells 20 may be set to any value according to different power demands. The multiple battery cells 20 may be connected in series, parallel, or series-parallel manner to achieve large capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, the battery cells 20 may be installed in groups for easy installation, and each group of battery cells 20 may constitute a battery module. The number of battery cells 20 included in a battery module is not limited and may be set according to demand.

[0077] As shown in FIG. 3, it is a structural schematic diagram of a battery cell 20 according to an embodiment of the present application, in which the battery cell 20 includes one or more electrode assemblies 22, a case 211 and a cover plate 212. The wall of the case 211 and the cover plate 212 are both referred to as the wall of the battery cell 20. The case 211 is determined according to the shape of the combination of one or more electrode assemblies 22, and may be, for example, a hollow rectangular parallelepiped or straight parallelepiped or cylindrical body, and one surface of the case 211 has an opening so that one or more electrode assemblies 22 can be placed in the case 211. The cover plate 212 covers the opening and is connected to the case 211 to form a sealed cavity in which the electrode assemblies 22 are placed. The case 211 is filled with an electrolyte, for example, an electrolyte solution.

[0078] The battery cell 20 may further include two electrode terminals 214, which may be installed on the cover plate 212. The cover plate 212 has a generally flat plate shape, and the two electrode terminals 214 are fixed to the flat surface of the cover plate 212, and are a positive electrode terminal 214a and a negative electrode terminal 214b, respectively. A connection part 23 is installed corresponding to each of the electrode terminals 214, or is also called a current collecting part 23, and is located between the cover plate 212 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0079] 3, each electrode assembly 22 has a first tab 221a and a second tab 222a of opposite polarity. For example, when the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab. The first tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via one connection part 23, and the second tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connection part 23.

[0080] For example, a first pressure relief mechanism 213 may be installed on one wall of the battery cell 20. The first pressure relief mechanism 213 is used to activate and release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0081] Optionally, in one embodiment of the present application, the first pressure relief mechanism 213 and the electrode terminal 214 are installed on different walls of the battery cell 20. For example, as shown in Fig. 3, the electrode terminal 214 of the battery cell 20 may be installed on the top wall of the battery cell 20, i.e., the cover plate 212. The first pressure relief mechanism 213 is installed on another wall of the battery cell 20 different from the top wall, for example, on the bottom wall 215 opposite to the top wall.

[0082] Optionally, in another embodiment of the present application, the first pressure relief mechanism 213 and the electrode terminal 214 are installed on the same wall of the battery cell 20. For example, the electrode terminal 214 and the first pressure relief mechanism 213 may both be installed on the top wall of the battery cell 20, i.e., the cover plate 212.

[0083] The first pressure relief mechanism 213 may be a part of the wall where it is located, or may be a separate structure from the wall where it is located, and may be fixed to the wall where it is located, for example, by welding. For example, in the embodiment shown in Fig. 3, when the first pressure relief mechanism 213 is a part of the bottom wall 215, the first pressure relief mechanism 213 may be formed by setting a notch in the bottom wall 215, and the thickness of the bottom wall 215 corresponding to the notch is smaller than the thickness of other regions of the first pressure relief mechanism 213 other than the notch. In addition, the first pressure relief mechanism 213 may be various possible pressure relief mechanisms, and the embodiments of the present application are not limited thereto. For example, the first pressure relief mechanism 213 may be a temperature sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 in which the first pressure relief mechanism 213 is provided reaches a threshold value, and / or the first pressure relief mechanism 213 may be a pressure sensitive pressure relief mechanism configured to rupture when the internal air pressure of the battery cell 20 in which the first pressure relief mechanism 213 is provided reaches a threshold value.

[0084] 4 shows a structural schematic diagram of a battery 10 according to an embodiment of the present application. Optionally, this FIG. 4 may be a top view, a bottom view or a side view of the battery 10.

[0085] 4, the battery 10 includes a plurality of battery cells 20, a housing 110, and an enclosure mechanism 30. Here, at least one of the plurality of battery cells 20 has a first pressure relief mechanism 213, the housing 110 is used to accommodate the plurality of battery cells 20 and has a second pressure relief mechanism 113, the enclosure mechanism 30 is used to surround a first exhaust space 310 corresponding to the first pressure relief mechanism 213 of the at least one battery cell 20, and the enclosure mechanism 30 is provided with an opening 301 communicating with the first exhaust space 310. When the first pressure relief mechanism 213 is operating, exhaust from at least one battery cell 20 enters the first exhaust space 310 from the first pressure relief mechanism 213 and is discharged to the second pressure relief mechanism 113 through the opening 301, and the minimum length B of the discharge path between the first pressure relief mechanism 213 and the second pressure relief mechanism 113 is greater than the shortest distance A between the first pressure relief mechanism 213 and the second pressure relief mechanism 113.

[0086] Specifically, in the battery 10 of the embodiment of the present application, the first pressure relief mechanism 213 in the battery cell 20 may be located on the same wall of the battery cell 20 as the electrode terminal 214 of the battery cell 20, as shown in Fig. 3. Alternatively, the first pressure relief mechanism 213 may be located on a different wall of the battery cell 20 than the electrode terminal 214. Specifically, for the technical solutions related to the battery cell 20 and the first pressure relief mechanism 213, reference may be made to the relevant description of the embodiment shown in Fig. 3 above, and no further description will be given here.

[0087] The housing 110 is used to accommodate the multiple battery cells 20 in the battery 10, and the specific shape of the housing 110 can be adapted to the overall shape of the multiple battery cells 20. Optionally, the housing 110 may be a rectangular hollow housing for accommodating at least one rectangular or other shaped battery cell 20, including a first portion 111 and a second portion 112 in the embodiment shown in Fig. 2 above. The relevant technical solution of the housing 110 may be referred to the relevant description of the embodiment shown in Fig. 2 above, and will not be further described here.

[0088] A second pressure relief mechanism 113 may be installed on the housing wall of the housing 110, and the second pressure relief mechanism 113 may be in communication with the internal space of the housing 110. When the first pressure relief mechanism 213 is activated, the discharged matter of the battery cell 20 enters the internal space of the housing 110 through the first pressure relief mechanism 213. Therefore, the second pressure relief mechanism 113 may be used to discharge the discharged matter to the outside of the housing 110, so as to ensure the safety performance of the battery 10.

[0089] Optionally, the second pressure relief mechanism 113 may be a temperature-sensitive pressure relief mechanism or a pressure-sensitive pressure relief mechanism, and the second pressure relief mechanism 113 is activated when the internal temperature and / or pressure of the housing 110 is greater than a preset threshold value, and the internal gas of the housing 110 can be discharged to the outside of the housing 110 through the second pressure relief mechanism 113. The embodiments of the present application are not limited to a specific implementation of the second pressure relief mechanism 113.

[0090] 4, in an embodiment of the present application, the enclosure mechanism 30 is installed in the internal space of the housing 110, and can surround the first exhaust space 310 corresponding to the first pressure relief mechanism 213 of at least one battery cell 20 to form the first exhaust space 310, and the enclosure mechanism 30 is provided with an opening 301 communicating with the first exhaust space 310. The first exhaust space 310 may include a space toward the first pressure relief mechanism 213 of the at least one battery cell 20. Since the enclosure mechanism 30 is provided with the opening 301, the enclosure mechanism 30 does not realize a completely sealed enclosure, but provides an exhaust outlet for the first exhaust space 310 at the opening 301.

[0091] Optionally, the enclosure mechanism 30 may be a frame-type structure having an opening 301. For example, as shown in Fig. 4, the enclosure mechanism 30 may be a rectangular frame-type structure, or in other alternative embodiments, the enclosure mechanism 30 may be a frame-type structure of other shapes, such as a circular frame-type structure, a polygonal frame-type structure, etc., and the embodiments of the present application are not limited to the specific shape of the frame-type structure.

[0092] During operation of the first pressure release mechanism 213 of at least one battery cell 20 in the battery 10, the exhaust of the at least one battery cell 20 is discharged through the first pressure release mechanism 213 and enters the first exhaust space 310 formed by the enclosure mechanism 30, and the exhaust is further discharged to the second pressure release mechanism 113 through the opening 301 communicating with the first exhaust space 310. Due to the installation of the enclosure mechanism 30, the exhaust cannot be directly discharged from the first pressure release mechanism 213 to the second pressure release mechanism 113, but is guided by the enclosure mechanism 30 to the opening 301 and further discharged to the second pressure release mechanism 113 through the opening 301, and the minimum length B of the exhaust path between the first pressure release mechanism 213 and the second pressure release mechanism 113 is greater than the shortest distance A between the first pressure release mechanism 213 and the second pressure release mechanism 113.

[0093] Alternatively, as shown in FIG. 4 by a short dashed line segment, the shortest distance A between the first pressure release mechanism 213 and the second pressure release mechanism 113 may be the connection distance between the center of the first pressure release mechanism 213 and the center of the second pressure release mechanism 113.

[0094] Alternatively, there may be multiple discharge paths for the discharged material between the first pressure release mechanism 213 and the second pressure release mechanism 113, and the minimum length B among the lengths of these multiple discharge paths may be determined and calculated based on the sizes of components such as the enclosure mechanism 30 and the housing 110 in the battery 10, and the relative positions of the first pressure release mechanism 213 and the second pressure release mechanism 113.

[0095] As an example, the long dashed arrows in FIG. 4 show a schematic diagram of two discharge paths for discharging the waste material through the first pressure relief mechanism 213 and the opening 301 to the second pressure relief mechanism 113. Here, the discharge path for discharging the waste material from the opening 301 to the right is the first discharge path, and the discharge path for discharging the waste material from the opening 301 to the left is the second discharge path. The length B of the first discharge path is smaller than the length B' of the second discharge path. The length B of the first discharge path may be the minimum length B of the discharge path between the first pressure relief mechanism 213 and the second pressure relief mechanism 113 for the waste material. The minimum length B of the discharge path is larger than the shortest distance A between the first pressure relief mechanism 213 and the second pressure relief mechanism 113.

[0096] In summary, the technical solution of the embodiments of the present application can extend the discharge path of the waste material inside the casing 110 of the battery 10 by installing the enclosure mechanism 30, and the minimum length B of this discharge path can be made greater than the shortest distance A between the first pressure release mechanism 213 and the second pressure release mechanism 113, thereby reducing the temperature of the waste material inside the casing 110, and reducing the temperature when it is discharged to the outside from the casing 110 of the battery 10 through the second pressure release mechanism 113, thereby improving the safety performance of the battery 10.

[0097] In some embodiments, the opening 301 in the enclosure mechanism 30 may be located at a position away from the second pressure relief mechanism 113 in the enclosure mechanism 30 .

[0098] As can be understood, the enclosure mechanism 30 may be formed by providing an opening 301 in a sealed frame structure. The sealed frame structure may be configured by connecting a plurality of enclosures arranged along the enclosure direction, and the plurality of enclosures have the same shape and size. Each enclosure has a certain distance from the second pressure relief mechanism 113, and the average of the distances between the plurality of enclosures and the second pressure relief mechanism 113 is a. When the distance between a certain enclosure among the plurality of enclosures and the second pressure relief mechanism 113 is greater than a, the position of the enclosure may be understood as a position in the enclosure mechanism 30 that is away from the second pressure relief mechanism 113, and the opening 301 may be provided at the position of the enclosure.

[0099] According to the technical solution of the embodiments of the present application, the opening 301 is positioned away from the second pressure relief mechanism 113 in the enclosure mechanism 30, thereby increasing the distance between the opening 301 and the second pressure relief mechanism 113, thereby further extending the discharge path of the exhaust from the battery cell 20 inside the casing 110 of the battery 10, and further reducing the temperature when the exhaust reaches the second pressure relief mechanism 113, thereby improving the safety performance of the battery 10.

[0100] In some embodiments, the opening 301 in the enclosure mechanism 30 may face a housing wall other than the housing wall in which the second pressure relief mechanism 113 in the housing 110 is located.

[0101] 4, one second pressure relief mechanism 113 may be installed in one housing wall of the housing 110, and the opening 301 in the enclosure mechanism 30 may face a housing wall adjacent to the housing wall in which the second pressure relief mechanism 113 is located in the housing 110. Or, in another example, the opening 301 may face a housing wall opposite to the housing wall in which the second pressure relief mechanism 113 is located in the housing 110. In the technical solution of this example, the orientation of the opening 301 is away from or opposite to the second pressure relief mechanism 113, so that the technical solution can increase the distance between the opening 301 and the second pressure relief mechanism 113, thereby further extending the discharge path of the discharged matter of the battery cell 20 inside the housing 110 of the battery 10.

[0102] In other examples, multiple second pressure relief mechanisms 113 may be installed in the housing 110, for example, the housing 110 may have a second pressure relief mechanism 113 installed in each of two opposing housing walls, and the opening 301 of the enclosure mechanism 30 may face a housing wall other than these two opposing housing walls in the housing 110.

[0103] Generally, the number of openings 301 shown in FIG. 4 is only one, and in other alternative embodiments, the number of openings 301 may be multiple, and all of these multiple openings 301 face toward other housing walls in the housing 110 other than the housing wall in which the second pressure relief mechanism 113 is located.

[0104] According to the technical proposal of the embodiments of the present application, the opening 301 of the enclosure mechanism 30 can be designed according to the installation location of the second pressure release mechanism 113 of the housing 110, thereby ensuring that the opening 301 does not face the housing wall where the second pressure release mechanism 113 is located, and increasing the distance between the opening 301 and the second pressure release mechanism 113, thereby further extending the discharge path of the exhaust from the battery cell 20 inside the housing 110 of the battery 10, and further reducing the temperature when the exhaust reaches the second pressure release mechanism 113, thereby improving the safety performance of the battery 10.

[0105] In the example shown in FIG. 4 above, the battery 10 may include only one enclosure mechanism 30 to facilitate mounting the enclosure mechanism 30 within the housing 110, while in some other embodiments the battery 10 may include multiple enclosure mechanisms 30 spaced apart from one another.

[0106] In this case, Fig. 5 shows another structural schematic diagram of the battery 10 according to one embodiment of the present application. This Fig. 5 is similar to Fig. 4 above, and may be a top view, a bottom view or a side view of the battery 10.

[0107] 5, the multiple battery cells 20 in the battery 10 may include four sets of battery cells 20. The battery 10 may include four enclosure mechanisms 30 corresponding to the four sets of battery cells 20, and each enclosure mechanism 30 is used to form a first exhaust space 310 corresponding to the first pressure relief mechanism 213 of one set of battery cells 20.

[0108] Furthermore, in this battery 10, the second pressure release mechanism 113 is installed in two opposing housing walls in the housing 110, and in this case, the openings 301 of each enclosure mechanism 30 may face toward other housing walls in the housing 110 other than the two housing walls in which the second pressure release mechanism 113 is located.

[0109] 5, the relative positions of the openings 301 of the four enclosing mechanisms 30 in the four enclosing mechanisms 30 may be the same, and the orientations of the four openings 301 may also be the same. Or, in other alternative embodiments, the relative positions of the openings 301 of the four enclosing mechanisms 30 in the four enclosing mechanisms 30 may be different, and the orientations of some of the openings 301 among the four openings 301 may also be different.

[0110] According to the technical solutions of the embodiments of the present application, multiple enclosing mechanisms 30 are installed in the housing 110 of the battery 10, and these multiple enclosing mechanisms 30 can be flexibly installed and adjusted according to actual needs, thereby playing a better guiding role for the discharge of the battery cells 20 at different positions in the housing 110, and the safety performance of the entire battery 10 is further improved.

[0111] In some embodiments, the opening 301 of the enclosure mechanism 30 may be located in a central region of the housing 110 .

[0112] As an example, FIG. 6 shows another structural schematic diagram of a battery 10 according to an embodiment of the present application.

[0113] 6 , the plurality of battery cells 20 in the battery 10 may include two sets of battery cells 20. The battery 10 may include two enclosure mechanisms 30 corresponding to the two sets of battery cells 20. Optionally, in the battery 10, the second pressure release mechanisms 113 may be installed on two opposing walls of the housing 110, and at this time, the openings 301 of each enclosure mechanism 30 may be located in the central region of the housing 110.

[0114] Alternatively, the two walls on which the second pressure relief mechanisms 113 are located may be two walls arranged opposite to each other in the x direction of the housing 110. When the housing 110 is a rectangular housing, the x direction may be the longitudinal direction, width direction, or height direction of the housing 110. In this case, the openings 301 of each enclosing mechanism 30 may be located in a central region of the housing 110 in the x direction.

[0115] According to the technical solution of the above embodiment, the opening 301 of the enclosure mechanism 30 is located in the central region of the housing 110, and the distance between the opening 301 and the second pressure relief mechanism 113 located on the housing wall of the housing 110 can be increased, thereby extending the discharge path of the exhaust from the battery cell 20 inside the housing 110 of the battery 10, and further reducing the temperature of the exhaust when it reaches the second pressure relief mechanism 113, thereby improving the safety performance of the battery 10.

[0116] FIG. 7 shows another structural schematic diagram of a battery 10 according to an embodiment of the present application.

[0117] As shown in FIG. 7, the openings of two adjacent enclosing mechanisms 30 among the multiple enclosing mechanisms 30 are installed on two adjacent walls of the two adjacent enclosing mechanisms 30, and the openings 301 of the two adjacent enclosing mechanisms 30 are installed offset from each other.

[0118] As an example, of two adjacent enclosure structures 30 shown in FIG. 7, one enclosure structure 30 has one opening 301 and the other enclosure structure 30 has two openings 301, and these three openings 301 are offset from each other so as to avoid the formation of direct convection between the two first exhaust spaces 310 surrounded by the two enclosure structures 30.

[0119] In the embodiment of the present application, the openings 301 of two adjacent enclosing mechanisms 30 are not installed directly opposite each other, but are installed offset from each other, that is, the exhaust discharged from the opening 301 of the first enclosing mechanism 30 does not directly enter the first exhaust space 310 formed by the second enclosing mechanism 30 through the opening 301 of the second enclosing mechanism 30, thereby preventing a wider range of impacts and damage caused by the high-temperature exhaust, and preventing the pressure in the first exhaust space 310 from becoming too high, thereby ensuring the safety performance of the battery 10.

[0120] It should be explained that in the embodiments shown in Figures 4 to 7 above, the number of enclosing mechanisms 30 and the number of battery cells 20 enclosed by each enclosing mechanism 30 are not limiting but merely approximate, and the number of enclosing mechanisms 30 and the enclosing method may be determined according to the number and arrangement method of battery cells 20 in the battery 10, and the embodiments of the present application are not specifically limited thereto.

[0121] FIG. 8 shows an exploded schematic diagram of a battery 10 according to one embodiment of the present application.

[0122] As shown in FIG. 8 , a first pressure relief mechanism 213 is installed on a first wall 201 of at least one battery cell 20, and the first wall 201 of the at least one battery cell 20 and a first housing wall 101 of the housing 110 are installed opposite each other, and an enclosure mechanism 30 is installed between the first housing wall 101 and the first wall 201 of the at least one battery cell 20.

[0123] In this embodiment, the first walls 201 of the at least one battery cell 20 may be located in the same plane. This arrangement makes it easier to install and attach the enclosure mechanism 30 between the first housing wall 101 and the first wall 201 of the at least one battery cell 20, and makes it easier for the enclosure mechanism to enclose the space corresponding to the first pressure relief mechanism 213 of the at least one battery cell 20 to form the first exhaust space 310.

[0124] Alternatively, as shown in FIG. 8, the enclosure mechanism 30 is attached to the first housing wall 101 of the housing 110 and the first wall 201 of the at least one battery cell 20, and the second pressure relief mechanism 113 is installed on a wall of the housing 110 other than the first housing wall 101.

[0125] 8 may be a rectangular hollow housing having six planar housing walls, in which the first housing wall 101 of the housing 110 and the first wall 201 of the battery cell 20 are disposed opposite to each other, and the first housing wall 101 of the housing 110 and the first wall 201 of the battery cell 20 are parallel to each other. The enclosure mechanism 30 may be directly attached between the first housing wall 101 and the first wall 201 of the battery cell 20, or may be indirectly attached between the first housing wall 101 and the first wall 201 of the battery cell 20 (e.g., via an adhesive layer or a fastener). The second pressure relief mechanism 113 may not be provided on the first housing wall 101, and may be provided on any other housing wall other than the first housing wall 101.

[0126] The first exhaust space 310 formed between the first housing wall 101 and the first wall 201 of the battery cell 20 and surrounded by the enclosing mechanism 30 is a space sealed in a first direction perpendicular to the first wall 201 of the battery cell 20, but has an opening in a second direction parallel to the first wall 201 of the battery cell 20. Since the second pressure release mechanism 113 is installed in a housing wall other than the first housing wall 101, the exhaust discharged from the battery cell 20 through the first pressure release mechanism 213 cannot be discharged through the first housing wall 101 in the first direction, but moves along the second direction and is discharged through the opening in the second direction of the first exhaust space 310 and the second pressure release mechanism 113 located in the other housing wall.

[0127] The technical solutions of the embodiments of the present application make it easier to stably attach the enclosure mechanism 30 to the housing 110, and also make it easier for the enclosure mechanism 30 to guide the direction of the waste from the at least one battery cell 20, thereby extending the discharge path of the waste inside the housing 110, and improving the safety performance of the battery 10.

[0128] Optionally, in some embodiments, as shown in FIG. 8 , the second housing wall 102 of the housing 110 intersects with the first housing wall 101 of the housing 110, and the second pressure relief mechanism 113 is installed on the second housing wall 102. A second exhaust space 320 is formed between the enclosure mechanism 30 and the second housing wall 102, and the second exhaust space 320 is connected to the first exhaust space 310 through the opening 301, and the exhaust of the at least one battery cell 20 enters the second exhaust space 320 through the opening 301 and is discharged to the second pressure relief mechanism 113.

[0129] Specifically, in the technical solution of this embodiment, the housing 110 may have four second housing walls 102 intersecting with the first housing wall 101 of the housing 110, for example, the four second housing walls 102 may be side walls of the housing 110 when the first housing wall 101 of the housing 110 is the top wall or bottom wall of the housing 110. The number of the second pressure relief mechanisms 113 may be one or more, and the one or more second pressure relief mechanisms 113 may be installed on any one or more of the four second housing walls 102.

[0130] A first exhaust space 310 is formed between the first housing wall 101 and the first wall 201 of the battery cell 20 by being surrounded by the enclosing mechanism 30, and a second exhaust space 320 may be formed between the enclosing mechanism 30 and the second housing wall 102. This second exhaust space 320 is used to communicate the first exhaust space 310 with a second pressure relief mechanism 113 located in the second housing wall 102.

[0131] In the technical solution of this embodiment, the enclosing mechanism 30 separates the first exhaust space 310 and the second exhaust space 320 inside the housing 110, and the second exhaust space 320 is connected to the second housing wall 102 of the housing 110, which makes it easier to design the position of the second pressure relief mechanism 113 on the second housing wall 102 of the housing 110, which is advantageous for further extending the exhaust path of the waste inside the housing 110, and ensures the safety performance of the battery 10.

[0132] FIG. 9 corresponds to the exploded view of the embodiment shown in FIG. 8, and shows a schematic plan view of the battery 10 in FIG.

[0133] 8 and 9, in some embodiments, at least one battery cell 20 is arranged to form a battery cell sequence, and two electrode terminals 214 are installed on the first wall 201 of each battery cell 20 in the battery cell sequence, and the first pressure relief mechanism 213 is installed between the two electrode terminals 214. The enclosure mechanism 30 is installed between the two electrode terminals 214 of each battery cell in the battery cell sequence.

[0134] 8 and 9, the battery cells 20 are arranged in a row along the width direction of the battery cells 20, and this row of battery cells 20 may be understood as one battery cell sequence. Alternatively, in other examples, the battery cells 20 may form one battery cell sequence in other arrangements, and the embodiments of the present application are not limited to the specific arrangement of the battery cells 20 in this battery cell sequence.

[0135] A first pressure relief mechanism 213 and two electrode terminals 214 are installed on the first wall 201 of each battery cell 20 in this battery cell sequence. The enclosure mechanism 30 is installed adjacent to the first pressure relief mechanism 213 of each battery cell 20 in this battery cell sequence, encloses a space corresponding to the first pressure relief mechanism 213, and may further be installed between the two electrode terminals 214 of each battery cell 20 in this battery cell sequence.

[0136] According to the technical solution of this embodiment, since the distance between the enclosing mechanism 30 and the first pressure release mechanism 213 is short, the enclosing mechanism 30 can act as a good barrier and guide for the waste material discharged from the first pressure release mechanism 213, and can prevent the waste material discharged from the first pressure release mechanism 213 from affecting the electrode terminal 214 or other components of the battery cell 20, thereby further ensuring the safety performance of the battery 10.

[0137] Optionally, when the electrode terminal 214 of the battery cell 20 and the first pressure relief mechanism 213 are located on the same wall, in another alternative embodiment, the enclosing mechanism 30 may enclose both the two electrode terminals 214 of the battery cell 20 and the space corresponding to the first pressure relief mechanism 213. With the technical solution of this embodiment, the enclosing mechanism 30 can realize a barrier and guide effect for the waste discharged through the first pressure relief mechanism 213, and extend the discharge path of the waste inside the housing 110.

[0138] 8 and 9 show schematic structural views including one enclosing mechanism 30 according to one embodiment of the present application, and hereinafter, Figs. 10 and 11 show schematic structural views including multiple enclosing mechanisms 30 according to another embodiment of the present application. Here, Fig. 10 is another schematic exploded view of the battery 10 according to one embodiment of the present application, and Fig. 11 is a plan view of the battery 10 in Fig. 10.

[0139] 10 and 11, in an embodiment of the present application, the battery 10 may include multiple sets of battery cells 20, and each set of battery cells 20 may include a battery cell sequence formed by arranging at least one battery cell 20, as shown in Figures 8 and 9. A space corresponding to the first pressure relief mechanism 213 of each set of battery cells 20 is surrounded by one enclosing mechanism 30.

[0140] Each of the multiple enclosing mechanisms 30 may be directly attached to the first housing wall 101 of the housing 110 and the first wall 201 of the set of battery cells 20. In particular, the relevant technical solutions of the enclosing mechanism 30 and the set of battery cells 20 may be referred to the relevant descriptions of the embodiments shown in Figures 8 and 9 above, and will not be further described here.

[0141] Optionally, in some embodiments, the housing 110 of the battery 10 may be provided with a beam 114, which can divide the interior space of the housing 110 into multiple subspaces, with each subspace being used to accommodate a set of battery cells 20. For example, as shown in Figures 10 and 11, the housing 110 may be provided with two intersecting beams 114, which divide the interior space of the housing 110 into four subspaces.

[0142] Optionally, one second pressure relief mechanism 113 may be installed on the housing wall corresponding to each subspace to facilitate the discharge of exhaust from the battery cells 20 in each subspace. For example, in the embodiment shown in Fig. 10, two second pressure relief mechanisms 113 may be installed on each of the two opposing second housing walls 102 in the housing 110, i.e., a total of four second pressure relief mechanisms 113 may be installed on the housing walls of the housing 110.

[0143] 10 and 11, the openings 301 of the multiple enclosure mechanisms 30 may be located in the central region of the housing 110. Alternatively, in other embodiments, the openings 301 of the multiple enclosure mechanisms 30 may face a housing wall other than the housing wall in which the second pressure relief mechanism 113 of the housing 110 is located.

[0144] In addition to the technical solution shown in Figures 8 to 11 above in which the enclosing mechanism 30 is attached to the first housing wall 101 of the housing 110 and the first wall 201 of at least one battery cell 20, in other embodiments, another member may be installed between the first housing wall 101 of the housing 110 and the first wall 201 of the at least one battery cell 20, and the enclosing mechanism 30 may be attached between this member and the first wall 201 of the at least one battery cell 20.

[0145] FIG. 12 shows another exploded schematic view of a battery 10 according to one embodiment of the present application.

[0146] As shown in FIG. 12 , in an embodiment of the present application, an isolation member 40 is installed between the first housing wall 101 of the housing 110 and the first wall 201 (not shown) of at least one battery cell 20, and the isolation member 40 is used to form an electrical cavity and an exhaust cavity that are isolated from each other inside the housing 110, where the electrical cavity is used to accommodate at least one battery cell 20 (not shown), and the enclosure mechanism 30 is installed in the exhaust cavity and attached to the first housing wall 101 of the housing 110 and the isolation member 40, and is used to surround a first exhaust space 310 corresponding to a first pressure relief mechanism 213 (not shown) of at least one battery cell 20 in the exhaust cavity to form the first exhaust space 310.

[0147] Specifically, in the technical solution of this embodiment, the isolating member 40 is used to separate the electrical cavity and the exhaust cavity in the internal space of the housing 110. That is, inside the housing 110, the electrical cavity that accommodates at least one battery cell 20 and the exhaust cavity that collects and exhausts the exhaust of the at least one battery cell 20 are separated. In this way, when an abnormality occurs in the battery cell 20, the exhaust of the battery cell 20 will first enter the exhaust cavity, and the exhaust will not directly affect the electrical components in the electrical cavity, so that the safety of the battery can be further enhanced.

[0148] Optionally, in some embodiments, the isolation member 40 may have a wall shared by the electrical cavity and the exhaust cavity. For example, the isolation member 40 may be both one wall of the electrical cavity and one wall of the exhaust cavity. In this way, exhaust from the battery cells 20 can pass directly through the isolation member 40 and into the exhaust cavity, avoiding the impact on performance parameters such as the energy density of the battery 10 due to the introduction of other structural members into the housing 110.

[0149] Furthermore, the enclosure mechanism 30 is installed in the exhaust cavity and attached to the first housing wall 101 and the isolation member 40 of the housing 110, forming a first exhaust space 310 between the first housing wall 101 and the isolation member 40 to receive and guide the exhaust material discharged within the housing 110.

[0150] According to the technical solution of the embodiment of the present application, the housing 110 is divided into an electrical cavity and an exhaust cavity which are isolated from each other by the isolation member 40, so that the exhaust of the battery cells 20 in the electrical cavity is exhausted to the exhaust cavity through the isolation member 40, without directly affecting the electrical structure of the battery cells 20 in the electrical cavity, thereby further improving the safety performance of the battery 10. Furthermore, the enclosure mechanism 30 is installed in the exhaust cavity and used to guide the exhaust so that it can only be exhausted through the opening 301 in the enclosure mechanism 30, which extends the exhaust path of the exhaust within the housing 110, and further improves the safety performance of the battery 10.

[0151] Optionally, the second pressure relief mechanism 113 may be installed on any of the housing walls of the housing 110. Depending on the specific location of the second pressure relief mechanism 113, an exhaust channel may be designed inside the housing 110 to communicate the second pressure relief mechanism 113 with the first exhaust space 310.

[0152] For example, the second pressure relief mechanism 113 may be installed on a housing wall corresponding to an electrical cavity in the housing 110, and in this case, the isolation member 40 may be designed with a channel communicating with the electrical cavity and the first exhaust space 310 so as to extend the exhaust path for the exhaust inside the housing 110.

[0153] Alternatively, the second pressure relief mechanism 113 may be installed in a housing wall corresponding to the exhaust cavity in the housing 110 so as to exhaust the exhaust from the exhaust cavity and prevent the exhaust from affecting the electrical structures in the electrical cavity.

[0154] Optionally, the second pressure relief mechanism 113 may be installed on a housing wall other than the first housing wall 101 of the housing 110 .

[0155] Specifically, in the embodiment of the present application, the first housing wall 101 and the isolating member 40 may be used to form two opposing walls of the exhaust cavity, and most of the exhaust of the battery cell 20 directly impinges on the first housing wall 101 after passing through the isolating member 40. Therefore, the second pressure relief mechanism 113 is not installed on the first housing wall 101, but on another housing wall, so as to extend the exhaust path of the exhaust inside the housing 110, thereby improving the safety of the battery 10.

[0156] Alternatively, in some embodiments, after the battery 10 is installed in the power consuming device, the first housing wall 101 of the battery 10 may be the bottom wall of the housing 110, and the first wall 201 on which the first pressure relief mechanism 213 of the at least one battery cell 20 is installed is also called the bottom wall of the at least one battery cell 20. The isolation member 40 can isolate the interior space of the housing 110 into two spaces, where the electrical cavity is located below the exhaust cavity. Or, in some other alternative embodiments, the electrical cavity may be located above the exhaust cavity or in other directions, and the examples of the present application are not specifically limited to the relative positions of the electrical cavity and the exhaust cavity.

[0157] Optionally, still referring to FIG. 12 , in some embodiments, the isolation member 40 is formed with a pressure relief area 410 of a first pressure relief mechanism 213 corresponding to at least one battery cell 20, and exhaust from the at least one battery cell 20 is discharged to an exhaust cavity through the pressure relief area 410, and the enclosure mechanism 30 is used to surround a first exhaust space 310 corresponding to the pressure relief area 410 in the exhaust cavity to form the first exhaust space 310.

[0158] Optionally, at least one pressure relief area 410 may be provided in the isolation member 40, and each pressure relief area may be provided opposite the first pressure relief mechanism 213 of one battery cell 20, and when the first pressure relief mechanism 213 is activated, waste products inside the battery cell 20 are discharged through the pressure relief area 410.

[0159] In some embodiments, pressure relief region 410 of isolation member 40 may be specially treated to make it more susceptible to breakage upon activation of first pressure relief mechanism 213. As an example, pressure relief region 410 may be a weakened region that is weaker than other regions of isolation member 40 other than pressure relief region 410.

[0160] Optionally, a groove is provided in the isolation member 40 facing the first pressure relief mechanism 213, and a weak area is formed on the bottom wall of the groove. The bottom wall of the groove is weaker than other areas of the isolation member 40 and is easily broken by the exhaust material, so that when the first pressure relief mechanism 213 is activated, the exhaust material can break the bottom wall of the groove and enter the exhaust cavity.

[0161] Alternatively, the weakened area may be formed as the pressure relief area 410 in the isolation member 40 in other ways, such as by providing a cut in the isolation member 40 to form the weakened area, and the present application is not specifically limited thereto.

[0162] The enclosure mechanism 30 is used to enclose a space corresponding to the pressure relief area 410 in the isolation member 40, thereby being able to receive the discharged material discharged through the first pressure relief mechanism 213 and the pressure relief area 410 and provide route guidance for the discharged material.

[0163] The technical solution of this embodiment provides a pressure relief area 410 in the isolation member 40, which can more effectively pass the effluent discharged from the first pressure relief mechanism 213 and prevent the effluent from affecting the electrical components in the electrical cavity. The enclosure mechanism 30 encloses the space corresponding to the pressure relief area 410, and can indirectly enclose the space corresponding to the first pressure relief mechanism 213 of the battery cell 20, thereby effectively guiding the effluent and comprehensively ensuring the safety performance of the battery 10.

[0164] Optionally, in the embodiment of the application, the isolation member 40 may be a thermal management member for adjusting the temperature of the battery cells 20. Optionally, the thermal management member may contain a fluid and be used to adjust the temperature of the battery cells. The fluid may be a liquid or a gas, and the temperature adjustment is to heat or cool the battery cells. When cooling or lowering the temperature of the battery cells, the thermal management member is used to contain a cooling fluid to reduce the temperature of the battery cells, and in this case, the thermal management member is also called a cooling member, a cooling system, or a cooling plate, and the fluid contained therein is also called a cooling medium or a cooling fluid, more specifically, a cooling liquid or a cooling gas. The thermal management member may also be used to heat and increase the temperature of the battery cells, and the embodiment of the application is not limited thereto. Optionally, the fluid may be a circulating flow to achieve a better temperature adjustment effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

[0165] According to the technical solution of this embodiment, by multiplexing the thermal management member as the isolation member 40, the housing 110 is separated into an electrical cavity and an exhaust cavity that are isolated from each other, which can ensure the safety of the battery 10; and the presence of the thermal management member can provide additional thermal management function for the battery cells 20 to further improve the safety performance of the battery 10.

[0166] FIG. 13 shows a schematic bottom view of the battery 10 in FIG.

[0167] As shown in FIG. 13 , the battery 10 may include multiple enclosure mechanisms 30, with each enclosure mechanism 30 being used to enclose a space corresponding to a set of pressure relief areas 410, which in turn correspond to a first pressure relief mechanism 213 of a set of battery cells 20.

[0168] 13 shows two adjacent enclosure mechanisms 30, the openings 301 of which may be located in the middle region of the exhaust cavity, or in alternative embodiments, the openings 301 of the two enclosure mechanisms 30 may be designed in other ways.

[0169] For example, FIG. 14 shows two schematic structural diagrams in which an enclosure mechanism 30 encloses a pressure relief area 410 according to one embodiment of the present application.

[0170] As shown in diagram (a) of Figure 14, in this embodiment, the installation method of the two surrounding mechanisms 30 is similar to that of Figure 13, but the opening 301 is smaller than the opening 301 shown in Figure 13. The technical solution of this embodiment enables the surrounding mechanism 30 to play a better guiding role for the exhaust, thereby further extending the exhaust path of the exhaust in the exhaust cavity.

[0171] 14(b), in this embodiment, of the two enclosing mechanisms 30, one of the enclosing mechanisms 30 may be provided with two openings 301, and the other enclosing mechanism 30 may be provided with one opening 301. The three openings 301 are offset from each other to avoid direct convection between the two first exhaust spaces 310 corresponding to the two enclosing mechanisms 30, to prevent the high-temperature exhaust from affecting or damaging a wider area, and to prevent the pressure in the first exhaust space 310 from becoming too high, thereby ensuring the safety performance of the battery 10.

[0172] It should be noted that Figures 13 and 14 are only a schematic illustration of the enclosing method for the pressure relief area 410 by two adjacent enclosing mechanisms 30, and in other alternative embodiments, the number of enclosing mechanisms 30 may be one or more than two, and the installation method of the opening 301 in the enclosing mechanism 30 may be related to the second pressure relief mechanism 113, and the specific design proposal may be referred to the relevant descriptions in the above embodiments, and will not be further described here.

[0173] Based on the above embodiment of the enclosure mechanism 30, optionally, a first filter hole 302 for filtering solid particles in the discharged matter is further formed in the enclosure mechanism 30. Optionally, the hole diameter of the first filter hole 302 is smaller than the radial size of the opening 301.

[0174] For example, Fig. 15 shows two other schematic structural views of the battery 10 according to an embodiment of the present application. Alternatively, view (a) in Fig. 15 may be a top view of the embodiment shown in Fig. 10, and view (b) in Fig. 15 may be a bottom view of the embodiment shown in Fig. 12.

[0175] 15, the enclosure mechanism 30 has a large opening 301 and further has a plurality of small first filter holes 302, which may be arranged at equal or non-equidistant intervals in the enclosure mechanism 30. Optionally, the position design and direction design of the first filter holes 302 may be the same as the related design of the above opening 301, for example, the first filter holes 302 may be located at a position away from the second pressure relief mechanism 113 in the enclosure mechanism 30, and / or may face a housing wall other than the housing wall where the second pressure relief mechanism 113 is located in the housing 110.

[0176] The first filter hole 302 has a function similar to that of the opening 301, and can be used to discharge the exhaust discharged from the battery cell 20 through the first pressure relief mechanism 213, but is mainly used to pass the gas in the exhaust. The solid particles with a large particle size in the exhaust can be filtered by this first filter hole 302 and cannot be discharged out of the first exhaust space 310 through the first filter hole 302. Therefore, this technical solution can reduce the high-temperature solid particles discharged to the second pressure relief mechanism 113 and further improve the safety of the battery 10.

[0177] In addition, by providing the first filter holes 302 in the enclosure mechanism 30, the exhaust speed and pressure release speed of the first exhaust space 310 can be accelerated, and the pressure in the first exhaust space 310 can be prevented from becoming too high. In addition, when there are a plurality of first filter holes 302, the airflows discharged from the plurality of first filter holes 302 can collide with each other to generate a certain turbulence, thereby reducing the harm caused by the direct collision of gases.

[0178] Optionally, in some embodiments, the enclosure mechanism 30 may be an interrupted structure, formed of a plurality of enclosure sections, with the first filter hole 302 formed in the gap between two adjacent enclosure sections among the plurality of enclosure sections.

[0179] According to the technical solution of this embodiment, after forming the first filter hole 302, the intermittent design of the enclosing mechanism 30 improves processing convenience, and there is no need to integrally mold the enclosing mechanism 30. Instead, multiple enclosing sub-structures can be manufactured separately to form the enclosing mechanism 30.

[0180] Optionally, in the above application embodiment, at least one of a filtering member, a gas absorbing member and a cooling member is installed in the exhaust path between the first pressure relief mechanism 213 and the second pressure relief mechanism 113 of the exhaust.

[0181] Specifically, the filtering member may be used to filter solid particles in the exhaust, the gas absorbing member may be used to absorb combustible gas in the exhaust, and the cooling member may be used to absorb heat from the exhaust to lower the temperature of the exhaust.

[0182] By installing at least one of a filtering member, a gas absorbing member, and a cooling member in the exhaust path, the hazard of the exhaust discharged to the outside of the housing 110 can be further reduced, and the safety performance of the battery 10 can be improved.

[0183] Optionally, the filter member may include a second filter hole or a folded airflow channel, which is used to filter solid particles in the exhaust.

[0184] Specifically, the relevant design of the second filter hole may be the same as that of the first filter hole 302, and the hole diameter of the second filter hole may be smaller than the particle size of the solid particles in the exhaust, thereby performing a filtering function for the solid particles. When the exhaust passes through the folded airflow channel, the solid particles in the exhaust tend to remain in the airflow channel, thereby performing a filtering function. In addition, the airflow channel can also perform a turbulent function to prevent damage to the housing 110 caused by the direct collision of the airflow in the exhaust.

[0185] Optionally, the gas absorbing member is formed of a gas absorbing material for absorbing combustible gases in the exhaust.

[0186] Optionally, the gas absorbing material may be a solid material or a liquid material. For example, the gas absorbing material may be a material having a microporous structure, such as activated carbon. For example, the gas absorbing material may be a solvent capable of absorbing combustible gas, and a shell may be coated on the outside of the solvent to form a solvent package, which is installed in the exhaust path between the first pressure relief mechanism 213 and the second pressure relief mechanism 113 as a gas absorbing member.

[0187] In some embodiments, the gas absorbing member and the filtration member may be two separate, independent members, or in other embodiments, the gas absorbing member may be interconnected to the filtration member, for example, the gas absorbing member may be applied to the filtration member in the form of a coating.

[0188] Optionally, the cooling member is formed of a heat absorbing material for absorbing heat from the effluent to cool the effluent. By way of example and not limitation, the heat absorbing material may be a metallic material, such as aluminum, copper, steel, etc. Alternatively, the heat absorbing material may be a phase change material, such as a cooling liquid, etc.

[0189] In some embodiments, the cooling member and the filtration member may be two separate, independent members, or in other embodiments, the cooling member may be integrally integrated with the filtration member, for example by forming second filtration holes or folded airflow channels in the heat absorbing material, which is both the cooling member and the filtration member.

[0190] Optionally, in the above embodiment, the maximum temperature T1 of the discharged material in the first pressure relief mechanism 213 and the maximum temperature T2 of the discharged material in the second pressure relief mechanism 113 satisfy the relationship T1-T2≧300°C.

[0191] According to the technical solution of this embodiment, the waste discharged from the battery cell 20 through the first pressure relief mechanism 213 passes through a long discharge path inside the housing 110, and the maximum temperature reaching the second pressure relief mechanism 113 is significantly reduced compared with the temperature in the first pressure relief mechanism 213, thereby preventing safety risks caused by discharging the waste outside the battery 10.

[0192] Optionally, in the embodiment of the above application, the maximum temperature T2 of the exhaust in the second pressure relief mechanism 113 is ≦300° C.

[0193] According to the technical solution of this embodiment, the waste material discharged from the battery cell 20 through the first pressure relief mechanism 213 passes through a long discharge path inside the housing 110 and reaches the second pressure relief mechanism 113 with a low maximum temperature, thereby more reliably preventing safety risks caused by discharging the waste material outside the battery 10 and ensuring the safety performance of the battery 10.

[0194] Optionally, in the embodiment of the above application, the melting point of the material of the enclosure 30 is 200° C. or higher.

[0195] In some embodiments, the material of the enclosure 30 may be a metallic material and may have a melting point of 300° C. or higher, and the enclosure 30 may be applied to a battery 10 with high energy density. Alternatively, the material of the enclosure 30 may be a non-metallic material, such as rubber, mica, carbon fiber, melamine foam, or polyurethane foam, and in this case, the carbonization temperature of the enclosure 30 is 200° C. or higher.

[0196] According to the technical solution of this embodiment, the material of the enclosing mechanism 30 is a high-temperature resistant material, which can resist the impact of high-temperature waste discharged from the battery cell 20, prevent the high-temperature waste from affecting the reliability of the enclosing mechanism 30 during use, and comprehensively ensure the safety performance of the battery 10.

[0197] An embodiment of the present application further provides a power consuming device, which may include the battery 10 in each of the above embodiments, and the battery 10 is used to provide electrical energy to the power consuming device. Optionally, the power consuming device may be a vehicle 1, a ship or a spacecraft.

[0198] Although the present application has been described with reference to the preferred embodiments, various modifications can be made and elements can be replaced with equivalents without departing from the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any form unless there is a structural conflict. The present application is not limited to the specific embodiments disclosed in the present specification, but includes all technical solutions included within the scope of the claims. [Explanation of symbols]

[0199] 1 vehicle 10 batteries 11 Motor 12 Controller 20 Battery Cells 22 Electrode Assembly 23 Current collectors and connecting parts 30 Enclosure Mechanism 40 Isolation member 100 Case 101 First Case 102 Second Case Wall 110 Cabinet 111 First Part 112 Second Part 113 Second pressure relief mechanism 114 Beam 201 The First Wall 211 cases 212 Cover plate 213 First pressure relief mechanism 214 Electrode terminal 214a Positive electrode terminal 214b Negative electrode terminal 215 Bottom wall 221a 1st tab 222a 2nd tab 301 Aperture 302 First filter hole 310 First exhaust space 320 Secondary Exhaust Space 410 Pressure relief area

Claims

1. A battery (10), comprising: A plurality of battery cells (20) each having at least one first pressure relief mechanism (213); A housing (110) used to house the plurality of battery cells (20) and having a second pressure relief mechanism (113); a first exhaust space (310) corresponding to the first pressure release mechanism (213) of the at least one battery cell (20) and having an opening (301) communicating with the first exhaust space (310), wherein, when the first pressure release mechanism (213) is activated, exhaust from the at least one battery cell (20) enters the first exhaust space (310) from the first pressure release mechanism (213) and is discharged to the second pressure release mechanism (113) through the opening (301), and a minimum length of a discharge path for the exhaust between the first pressure release mechanism (213) and the second pressure release mechanism (113) is greater than a shortest distance between the first pressure release mechanism (213) and the second pressure release mechanism (113).

2. The battery (10) of claim 1, wherein the opening (301) is located at a position in the enclosure (30) away from the second pressure relief mechanism (113).

3. The battery (10) according to claim 1 or 2, characterized in that the opening (301) faces a housing wall other than a housing wall in which the second pressure relief mechanism (113) is located in the housing (110).

4. The battery (10) of claim 1, wherein the opening (301) is located in a central region of the housing (110).

5. The battery (10) according to claim 1, characterized in that the number of the enclosure mechanisms (30) is plural, and the enclosure mechanisms (30) are installed at intervals.

6. The battery (10) of claim 5, characterized in that the openings (301) of two adjacent enclosure mechanisms (30) among the plurality of enclosure mechanisms (30) are installed on two adjacent walls of the two adjacent enclosure mechanisms (30), and the openings (301) of the two adjacent enclosure mechanisms (30) are installed offset from each other.

7. The battery (10) of claim 1, characterized in that the first pressure relief mechanism (213) is installed on a first wall (201) of the at least one battery cell (20), the first wall (201) of the at least one battery cell (20) and a first housing wall (101) of the housing (110) are installed opposite each other, and the enclosure mechanism (30) is installed between the first housing wall (101) and the first wall (201) of the at least one battery cell (20).

8. The battery (10) of claim 7, characterized in that the enclosure mechanism (30) is attached to the first housing wall (101) and a first wall (201) of the at least one battery cell (20), and the second pressure relief mechanism (113) is installed in another housing wall of the housing (110) other than the first housing wall (101).

9. a second housing wall (102) of the housing (110) intersects with a first housing wall (101) of the housing (110), and the second pressure relief mechanism (113) is installed on the second housing wall (102); 9. The battery (10) of claim 8, wherein a second exhaust space (320) is formed between the enclosure mechanism (30) and the second housing wall (102), the second exhaust space (320) is in communication with the first exhaust space (310) through the opening (301), and the discharged matter enters the second exhaust space (320) through the opening (301) and is discharged to the second pressure relief mechanism (113).

10. 8. The battery (10) of claim 7, wherein the at least one battery cell (20) is arranged to form a battery cell sequence, and two electrode terminals are provided on a first wall (201) of each battery cell (20) in the battery cell sequence, the first pressure relief mechanism (213) is provided between the two electrode terminals, and the enclosure mechanism (30) is provided between the two electrode terminals of each battery cell (20) in the battery cell sequence.

11. an isolation member (40) is installed between the first housing wall (101) and a first wall (201) of the at least one battery cell (20), the isolation member (40) being used to form an electrical cavity and an exhaust cavity that are isolated from each other inside the housing (110); the electrical cavity is used to accommodate the at least one battery cell (20), and exhaust from the at least one battery cell (20) is exhausted to the exhaust cavity through the isolation member (40); The battery (10) of claim 7, characterized in that the enclosure mechanism (30) is installed in the exhaust cavity and attached to the isolation member (40) and the first housing wall (101), and is used to surround the first exhaust space (310) corresponding to the first pressure relief mechanism (213) of the at least one battery cell (20) in the exhaust cavity to form the first exhaust space (310).

12. The battery (10) according to claim 11, characterized in that the second pressure relief mechanism (113) is installed on a housing wall corresponding to the exhaust cavity of the housing (110).

13. The battery (10) according to claim 11, characterized in that the second pressure relief mechanism (113) is installed on a wall of the housing (110) other than the first wall (101).

14. The battery (10) of claim 11, characterized in that the isolation member (40) is formed with a pressure relief area (410) of a first pressure relief mechanism (213) corresponding to the at least one battery cell (20), exhaust from the at least one battery cell (20) is discharged to the exhaust cavity through the pressure relief area (410), and the enclosure mechanism (30) is used to surround the first exhaust space (310) corresponding to the pressure relief area (410) in the exhaust cavity to form the first exhaust space (310).

15. The battery (10) of claim 11, wherein the isolation member (40) is a thermal management member for regulating a temperature of the battery cells (20).

16. 2. The battery (10) of claim 1, wherein the enclosure (30) is formed with a first filter hole (302) for filtering solid particles in the exhaust.

17. The battery (10) of claim 16, characterized in that the enclosure mechanism (30) has an intermittent structure and is formed of a plurality of enclosure parts, and the first filter hole (302) is formed in a gap between two adjacent enclosure parts among the plurality of enclosure parts.

18. The battery (10) of claim 1, characterized in that at least one of a filter member, a gas absorbing member, and a cooling member is installed in the discharge path of the discharged material between the first pressure relief mechanism (213) and the second pressure relief mechanism (113).

19. 20. The battery (10) of claim 18, wherein the filtering member includes a second filtering hole or a folded airflow channel, the second filtering hole or the folded airflow channel being used to filter solid particles in the exhaust.

20. 20. The battery (10) of claim 18 or 19, wherein the gas absorbing member is formed of a gas absorbing material for absorbing combustible gases in the effluent.

21. 20. The battery (10) of claim 18, wherein the cooling member is formed of a heat absorbing material for absorbing heat of the effluent and cooling the effluent.

22. The battery (10) of claim 1, wherein a maximum temperature T1 of the discharged material in the first pressure relief mechanism (213) and a maximum temperature T2 of the discharged material in the second pressure relief mechanism (113) satisfy a relationship of T1-T2≧300° C.

23. 23. The battery (10) of claim 22, wherein the maximum temperature T2 of the exhaust in the second pressure relief mechanism (113) is ≦300° C.

24. The battery (10) of claim 1, wherein the melting point of the material of the enclosure (30) is 200° C. or higher.

25. An electrical power consuming device, comprising a battery (10) according to claim 1, said battery (10) being used to provide electrical energy.

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