Battery, electric device, and battery manufacturing method and device

Abstract

Provided are a battery, an electric device, and a method and apparatus for manufacturing a battery. The battery (10) includes a plurality of battery cells (20) having a housing (25) that is arranged to be activated to release the internal pressure of the housing (25) when the internal pressure or temperature of the housing (25) reaches a threshold value, a plurality of first housings (11) for accommodating at least one battery cell (20) of the plurality of battery cells (20), and a second housing (12) for accommodating the plurality of first housings (11), including a pressure release area (113) for releasing the internal pressure of the first housing (11). Thus, the safety of the battery (10) can be improved.

Description

[Technical field]

[0001] This application relates to the technical field of batteries, and in particular to batteries, electrical devices, and methods and apparatus for manufacturing batteries. [Background technology]

[0002] Energy saving and emission reduction are the keys to the sustainable development of the automotive industry. In this case, electric vehicles have become an important part of the sustainable development of the automotive industry due to their energy saving and environmentally friendly advantages. For electric vehicles, battery technology is a key factor related to their development. Summary of the Invention [Problem to be solved by the invention]

[0003] In addition to improving battery performance, safety issues are also an issue that cannot be ignored in the development of battery technology. If the safety issues of a battery cannot be ensured, the battery will seriously threaten the safety of passengers' lives and property. How to improve the safety of batteries is an issue that must be resolved as soon as possible in battery technology. [Means for solving the problem]

[0004] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiments provide a battery, an electrical device, and a method and apparatus for manufacturing a battery that can improve the safety of the battery.

[0005] According to a first aspect, a battery is provided comprising a plurality of battery cells having a housing configured to be activated to release the internal pressure of the housing when the internal pressure or temperature of the housing reaches a threshold value, a plurality of first housings including a pressure release region for releasing the internal pressure of the first housing, for accommodating at least one battery cell of the plurality of battery cells, and a second housing for accommodating the plurality of first housings.

[0006] In the technical solution of the embodiment of the present application, a battery cell having a housing is accommodated in a first housing provided with a pressure release area, and multiple first housings are provided in a second housing. Therefore, when a battery cell in a first housing experiences thermal runaway (the internal pressure and temperature of the battery cell rise rapidly after thermal runaway occurs) and the internal pressure or temperature of the battery cell reaches a threshold value, the housing of the battery cell is activated to release the internal pressure of the battery cell into the first housing. Since the first housings are multiple and independent of each other, when a battery cell in a first housing experiences thermal runaway, the influence of the generated emissions and heat on the battery cells in the other first housings is greatly reduced, improving the safety of the battery. In addition, since the first housing has a pressure release area that can release the internal pressure of the first housing, it is possible to prevent the first housing from exploding after the battery cell experiences thermal runaway, and further improve the safety of the battery.

[0007] In some embodiments, the second housing comprises an electrical cavity for accommodating the plurality of first housings, a collection cavity for collecting emissions from the first housings, and an isolation member for isolating the electrical cavity and the collection cavity such that the electrical cavity and the collection cavity are provided on opposite sides of the isolation member.

[0008] The electrical cavity that accommodates the first housing and the collection cavity that collects the emissions are isolated by an isolation member, and when the housing of the battery cell in the first housing is operated, the emissions from the battery cell enter the collection cavity, so that no emissions or only a small amount of emissions enter the electrical cavity, thereby isolating the emissions from the battery cells, reducing the impact of the emissions from the battery cells (which include gases, combustible materials, metal chips, etc.) on the electrical connection parts, and preventing short-circuiting between battery cells due to emissions from the battery cells, thereby improving the safety of the battery.

[0009] In some embodiments, the pressure relief area faces the isolation member.

[0010] Because the pressure relief area faces the isolation member and exhaust released from the pressure relief area can directly impinge on the isolation member, the exhaust is more likely to enter the collection cavity and reduces the likelihood of the exhaust entering the electrical cavity.

[0011] In some embodiments, the first housing is a cover having an opening that forms the pressure relief area.

[0012] Since the opening forms a pressure release area, the internal pressure within the first housing can be released through the opening, preventing the first housing from exploding and improving the safety of the battery.

[0013] In some embodiments, the isolation member covers the opening.

[0014] By covering the opening in the first housing with an isolation member, it is possible to block the substance in the collection cavity from entering the electrical cavity.

[0015] In some embodiments, the first housing has a cavity that accommodates the battery cell, and the pressure relief area is a first weakened area of ​​the first housing, the first weakened area being configured to activate to relieve the internal pressure of the cavity when an internal pressure or temperature of the cavity reaches a threshold value.

[0016] By housing the battery cell in a first housing, providing a first vulnerable area in the first housing, and making the first vulnerable area a pressure release area, when the first vulnerable area is activated when the internal pressure or temperature of the first housing reaches a threshold, the internal pressure of the first housing can be released through the pressure release area, that is, the waste is directionally discharged from the first housing through the pressure release area, and the explosion of the first housing can be prevented. At the same time, when the battery is operating normally (when the battery is not experiencing thermal runaway), the first vulnerable area can prevent foreign matter (e.g., conductive material) from entering the first housing, improving the safety of the battery.

[0017] In some embodiments, the thickness of the first area of ​​weakness is less than the thickness of other areas of the wall in which the first area of ​​weakness is located.

[0018] Since the thickness of the first weakened area is smaller than the thickness of the other areas of the wall where the first weakened area is located, the first weakened area is easily broken, and at the same time, the method for forming such a pressure relief area is simple and convenient.

[0019] In some embodiments, the first weakened region has a thickness between 0.4 mm and 3 mm.

[0020] The thickness of the first vulnerable region is between 0.4mm and 3mm, ensuring that the first vulnerable region is not so thin that it shortens the battery's service life, but not so thick that it requires high air pressure to operate, thereby achieving both the battery's service life and safety.

[0021] In some embodiments, the first area of ​​weakness has a lower melting point than other areas of the wall in which the first area of ​​weakness is located.

[0022] The first weakened area has a lower melting point than other areas of the wall in which it is located, making the first weakened area susceptible to rupture, such that it can be activated to release internal pressure in the first housing when the temperature of the first weakened area reaches a threshold value.

[0023] In some embodiments, the melting point of the material of the first weakened region is below 600°C.

[0024] Since the material of the first weak region has a melting point of less than 600° C., the first weak region is broken at a relatively low temperature, and the internal pressure of the first housing can be released.

[0025] In some embodiments, the first housing is provided with a first recessed groove whose bottom wall is the first weakened area.

[0026] Providing the first groove in the first housing and making the bottom wall of the first groove the first weakened area is a simple and low-cost method for achieving this.

[0027] In some embodiments, an opening of the first groove faces the battery cell.

[0028] By providing an opening on the surface of the first housing facing the battery cell to form the first groove, a larger gap can be created between the bottom wall of the first groove and the battery cell, which contributes to discharging waste from the battery cell into the first groove.

[0029] In some embodiments, the isolation member is arranged to contain a fluid to regulate a temperature of the battery cells.

[0030] By arranging the isolating member to contain fluid and regulate the temperature of the battery cells, the isolating member can be used to achieve the purpose of heating or cooling the battery cells, and provide temperature regulation to the battery cells.

[0031] In some embodiments, the isolation member is arranged such that the pressure relief region can be ruptured upon releasing the internal pressure, thereby allowing the fluid to be expelled from an interior of the isolation member.

[0032] When the pressure relief area releases the internal pressure, the isolation member is broken and fluid is discharged from the interior of the isolation member, thus allowing the fluid to cool the battery cell exhaust and reduce the risk of exhaust.

[0033] In some embodiments, the isolation member comprises a first thermally conductive plate attached to the first housing, a second thermally conductive plate provided on a side of the first thermally conductive plate away from the first housing, and a first runner formed between the first thermally conductive plate and the second thermally conductive plate for the flow of the fluid.

[0034] Because the isolation member comprises a first thermally conductive plate and a second thermally conductive plate, and a first runner is formed between the first thermally conductive plate and the second thermally conductive plate, the process of manufacturing the isolation member is convenient and simple.

[0035] In some embodiments, the isolation member has a through hole facing the pressure release area through which effluent from the first housing can pass so that the effluent can enter the collection cavity.

[0036] A through hole is provided opposite the pressure release area, allowing waste from the first housing to pass through the through hole and enter the collection cavity, thereby making it easier for the waste to enter the collection cavity and reducing the possibility of the waste entering the electrical cavity.

[0037] In some embodiments, the isolation member is arranged such that it can be broken when the pressure relief area releases the internal pressure, thereby allowing effluent from the first housing to pass through the isolation member and into the collection cavity.

[0038] When the pressure relief area releases the internal pressure, the isolation member may be broken, allowing the exhaust from the first housing to pass through the isolation member and into the collection cavity, thereby making it easier for the exhaust to enter the collection cavity and reducing the likelihood of the exhaust entering the electrical cavity.

[0039] In some embodiments, the isolation member has a second weakened area facing the pressure release area and arranged to be breakable by the exhaust of the first housing, such that the exhaust of the first housing passes through the second weakened area and into the collection cavity.

[0040] By providing the isolation member with a second weak area corresponding to the pressure release area, on the one hand, when the battery cell housing is operated, emissions from the first housing can pass through the second weak area and enter the collection cavity, reducing the possibility of the emissions entering the electrical cavity, and on the other hand, when the battery cell housing is not operated, isolation between the electrical cavity and the collection cavity can be ensured, and substances in the collection cavity can be prevented from entering the electrical cavity.

[0041] In some embodiments, the thickness of the second area of ​​weakness is less than the thickness of other areas of the wall in which the second area of ​​weakness is located.

[0042] The second area of ​​weakness is susceptible to fracture because the thickness of the second area of ​​weakness is less than the thickness of other areas of the wall in which the second area of ​​weakness is located.

[0043] In some embodiments, the second weakened region has a thickness between 0.4 mm and 3 mm.

[0044] The thickness of the second vulnerable region is between 0.4mm and 3mm, ensuring that the second vulnerable region is not so thin that it shortens the battery's service life, but not so thick that it requires high air pressure to operate, thereby achieving both the battery's service life and safety.

[0045] In some embodiments, the second area of ​​weakness has a lower melting point than other areas of the wall in which the second area of ​​weakness is located.

[0046] The second weakened area is susceptible to fracture because it has a lower melting point than other areas of the wall in which it is located, such that it can be activated to release internal pressure in the electrical cavity when the temperature of the second weakened area reaches a threshold value.

[0047] In some embodiments, the melting point of the material of the second weakened region is below 600°C.

[0048] Since the material of the second weak region has a melting point of less than 600° C., the second weak region is broken at a relatively low temperature, allowing the internal pressure of the electrical cavity to be released.

[0049] In some embodiments, the isolation member includes a second recess having a bottom wall that is the second weakened area.

[0050] By providing the second groove in the isolating member, the bottom wall of the second groove serves as the second weakened area, which is easy to implement and low cost.

[0051] In some embodiments, an opening of the second groove faces the first housing.

[0052] By providing an opening on the surface of the isolation member facing the first housing to form a second groove, a larger gap can be created between the bottom wall of the second groove and the first housing, which contributes to discharging waste from the first housing into the second groove.

[0053] In some embodiments, a plurality of the first housings correspond to the same isolation member.

[0054] Using the same isolation members for the multiple first housings is a simple and low-cost method for realizing the isolation members.

[0055] In some embodiments, the pressure release area is provided on a first wall of the first housing, a first surface of the battery cell is attached to the first wall, and all electrode terminals of the battery cell are provided on a second surface opposite the first surface.

[0056] By attaching the surface of the battery cell that does not have the electrode terminals to the first wall in which a pressure release area is provided in the first housing, when the battery cell housing is activated, the discharged matter from the battery cell can be moved further away from the electrode terminals, reducing the effect of the discharged matter on the electrode terminals, thereby improving the safety of the battery.

[0057] In some embodiments, all of the battery cells contained within one first housing correspond to the same pressure release area.

[0058] By making the pressure release areas of all the battery cells in the first housing the same, when the battery cell housing is activated, the exhaust from the battery cells in the first housing can be concentrated along one pressure release area and discharged from the first housing, reducing the impact on the electrical connection components in the first housing, thus improving the safety of the battery, and at the same time, the method of realization is simple and low cost.

[0059] In some embodiments, the first housing contains a row or column of multiple battery cells.

[0060] By arranging the multiple battery cells in the first housing in one row or one column, it is possible to save the internal space of the first housing.

[0061] In some embodiments, the battery further comprises a protective member disposed to protect the isolation member and to define the collection cavity between the isolation member and the protective member.

[0062] The collecting cavity formed by the protective member and the isolating member can effectively collect and buffer the discharged material, reducing the risk of the discharged material. At the same time, the protective member can provide protection for the isolating member, preventing the isolating member from being destroyed by foreign objects.

[0063] In some embodiments, the battery further comprises a sealing member disposed between the isolation member and the protective member for sealing the collection cavity.

[0064] The collection cavity formed by the isolation member and the protective member can be made into a sealed chamber with the sealing member, thereby preventing substances in the collection cavity from entering the electrical cavity.

[0065] According to a second aspect, there is provided an electrical device comprising a battery according to the first aspect.

[0066] According to a third aspect, there is provided a plurality of battery cells having a housing arranged to be activated to release internal pressure of the housing when an internal pressure or temperature of the housing reaches a threshold value, and a plurality of first housings for accommodating at least one battery cell of the plurality of battery cells, the first housings including a pressure release region for releasing the internal pressure of the first housing. To provide and a second housing for accommodating the plurality of first housings. To provide The present invention provides a method for manufacturing a battery comprising the steps of:

[0067] According to a fourth aspect, there is provided a battery manufacturing apparatus comprising: a provision module used for providing a plurality of battery cells having a housing arranged to activate and release the internal pressure of the housing when the internal pressure or temperature of the housing reaches a threshold value; providing a plurality of first housings including a pressure release area for releasing the internal pressure of the first housing for housing at least one battery cell of the plurality of battery cells; and providing a second housing for housing the plurality of first housings. [Brief description of the drawings]

[0068] In order to more clearly describe the technical solutions of the embodiments of the present application, the following briefly describes the drawings to be used in the embodiments of the present application. Obviously, the following drawings only show some embodiments of the present application, so that a person skilled in the art can further obtain other drawings based on these drawings without creative efforts.

[0069] [Figure 1] 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application; [Diagram 2] FIG. 2 is a schematic diagram of an exploded structure of a battery according to some embodiments of the present application. [Diagram 3] FIG. 2 is a schematic diagram of an exploded structure of a battery according to some embodiments of the present application. [Figure 4] FIG. 2 is a schematic diagram of an exploded structure of a battery according to some embodiments of the present application. [Diagram 5] FIG. 2 is a schematic diagram of an exploded structure of a battery cell according to an embodiment of the present application. [Figure 6] FIG. 2 is a schematic cross-sectional view of a first housing according to some embodiments of the present application. [Figure 7] FIG. 2 is a schematic cross-sectional view of a first housing according to some embodiments of the present application. [Figure 8] 1 is a schematic cross-sectional view of a combined structure of a first housing and a second housing according to some embodiments of the present application. [Figure 9] 1 is a schematic cross-sectional view of a combined structure of a first housing and a second housing according to some embodiments of the present application. [Figure 10]1 is a schematic cross-sectional view of a combined structure of a first housing and a second housing according to some embodiments of the present application. [Figure 11] 1 is a schematic cross-sectional view of a combined structure of a first housing and a second housing according to some embodiments of the present application. [Figure 12] 1 is a schematic cross-sectional view of a combined structure of a first housing and a second housing according to some embodiments of the present application. [Figure 13] 1 is a schematic cross-sectional view of a combined structure of a first housing and a second housing according to some embodiments of the present application. [Figure 14] 2 is a structural schematic diagram of an isolation member according to an embodiment of the present application; FIG. [Figure 15] 15 is an enlarged schematic structural diagram of a portion A of the isolation member shown in FIG. 14. FIG. [Figure 16] 1 is a schematic flowchart of a battery manufacturing method according to an embodiment of the present application. [Figure 17] 1 is a schematic block diagram of a battery manufacturing apparatus according to an embodiment of the present application.

[0070] The drawings are not drawn to scale. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0071] The following describes the embodiments of the present application in more detail with reference to the drawings and examples. The detailed description of the following embodiments and the drawings are used to exemplarily explain the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0072] In the description of this application, unless otherwise specified, "multiple" means two or more (including two), and the orientation or positional relationship of terms such as "upper", "lower", "left", "right", "inner", "outer", etc., is intended only to facilitate and simplify the description of this application, and does not indicate or imply that the devices or elements shown have a particular orientation, are configured, or must operate in a particular orientation, and should not be understood as limiting this application. Also, terms such as "first", "second", "third", etc., are merely for descriptive purposes, and should not be understood as indicating or implying relative importance. "Perpendicular" is not strictly perpendicular, but has a margin of error. "Parallel" is not strictly parallel, but has a margin of error.

[0073] All directional terms appearing in the following description are directional terms shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, unless otherwise specified or limited, technical terms such as "attached", "connected", and "connection" should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, or integrated, and may be directly connected or indirectly connected via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0074] In the present application, the battery cell may include a lithium ion battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, and the like, and there is no limitation thereto in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shape, and there is no limitation thereto in the embodiments of the present application. Battery cells are generally broadly divided into three types, namely, a cylindrical cell, a prismatic cell, and a pouch cell, depending on the packaging method, and there is no limitation thereto in the embodiments of the present application.

[0075] A battery in the embodiments of the present application is a single physical module that includes one or more battery cells to provide higher voltage and / or capacity. For example, a battery in the embodiments of the present application may include a battery module or a battery pack. A battery module typically includes one or more battery cells connected in series, parallel, or series-parallel. A battery pack typically includes one or more battery modules and a housing for packaging the battery modules. The housing can prevent liquids and other foreign objects from affecting the charging and discharging of the battery cells. A battery cell in the embodiments of the present application is the smallest unit module that can be charged and discharged independently.

[0076] The battery cell includes an electrode assembly consisting of a positive electrode sheet, a negative electrode sheet, and a separator, and an electrolyte. The battery cell is mainly operated by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is applied to the surface of the positive electrode collector, the collector on which the positive electrode active material layer is not applied protrudes from the collector on which the positive electrode active material layer is applied, and the collector on which the positive electrode active material layer is not applied is a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is applied to the surface of the negative electrode collector, the current collector on which the negative electrode active material layer is not applied protrudes from the current collector on which the negative electrode active material layer is applied, and the current collector on which the negative electrode active material layer is not applied is a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The positive electrode tab is formed by stacking a plurality of pieces, and the negative electrode tab is formed by stacking a plurality of pieces so that a large current can pass without melting. The tab is electrically connected to an electrode terminal, and the electrode terminal generally includes a positive electrode terminal and a negative electrode terminal. The plurality of battery cells are connected in series and / or in parallel via a bus member, and are used in various situations. The material of the separator may be PP or PE, etc. In addition, the electrode assembly may be a wound type structure or a stacked type structure, and the embodiment of the present application is not limited thereto.

[0077] Any "battery cell" mentioned below will be described using a "pouch-type battery cell" as an example.

[0078] Besides the electrode assembly and the electrolyte, the pouch-type battery cell further has a housing, which may be understood as an exterior and may be an aluminum plastic film. The housing can be operated to release the internal pressure or temperature of the housing when the internal pressure or temperature of the battery cell reaches a certain threshold. The design of the threshold varies according to design needs. The threshold may 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.

[0079] In this application, "operation" means that the housing operates or is activated to a certain state, thereby releasing the internal pressure or temperature of the housing of the battery cell. Operation by the housing may include, but is not limited to, cases where at least a portion of the housing is broken, crushed, or broken. When the housing operates, high-temperature and high-pressure materials inside the battery cell are discharged to the outside from the operated location as discharge. In this way, by releasing the pressure or temperature of the battery cell in a situation where the pressure or temperature is controllable, it is possible to avoid a potentially more serious accident.

[0080] In this application, the discharged materials from the battery cell include, but are not limited to, electrolyte, dissolved or decomposed positive and negative electrode sheets, separator fragments, high-temperature and high-pressure gases caused by reactions, flames, etc.

[0081] The development of battery technology requires simultaneous consideration of various design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charge / discharge efficiency, as well as battery safety.

[0082] In the conventional battery design, the focus is mainly on releasing the high pressure and heat inside the battery cell housing, that is, discharging the exhaust to the outside of the battery cell housing. In addition, since the high temperature and high pressure exhaust is discharged to all sides of the battery cell, the exhaust may be very powerful and destructive, which may cause thermal runaway of other battery cells and cause further safety issues.

[0083] In view of this, the present application provides a technical solution in which a battery cell having a housing is accommodated in a first housing provided with a pressure release area, and multiple first housings are provided in a second housing. Therefore, when a battery cell in a certain first housing experiences thermal runaway (the internal pressure and temperature of the battery cell rise rapidly after the occurrence of thermal runaway) and the internal pressure or temperature of the battery cell reaches a threshold value, the housing of the battery cell is activated to release the internal pressure of the battery cell to the outside of the first housing. Since the first housings are multiple and independent of each other, when a battery cell in a certain first housing experiences thermal runaway, the influence of the generated waste and heat on the battery cells in the other first housings is greatly reduced, improving the safety of the battery. In addition, since the first housing has a pressure release area that can release the internal pressure of the first housing, it is possible to prevent the first housing from exploding after the occurrence of thermal runaway of the battery cell, and further improve the safety of the battery.

[0084] The technical solutions described in the embodiments of the present application can be applied to various devices that use batteries, such as mobile phones, portable devices, laptops, electric bicycles, electric toys, power tools, electric vehicles, ships, and spacecraft, including, for example, airplanes, rockets, space shuttles, spacecraft, etc.

[0085] As can be understood, the technical solutions described in the embodiments of the present application are not only applicable to the above-mentioned equipment, but also to all equipment using batteries. For the sake of simplicity, however, the following embodiments are all described using electric vehicles as an example.

[0086] For example, refer to FIG. 1, which is a structural schematic diagram of a vehicle 1 according to one embodiment of the present application. The vehicle 1 may be a gasoline vehicle, a natural gas vehicle, a new energy vehicle, etc., and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range extender electric vehicle, etc. A motor 40, a controller 30, and a battery 10 may be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to supply power to the motor 40. For example, the battery 10 may be provided at the bottom, head, or rear of the vehicle 1. The battery 10 is applied to power the vehicle 1, for example, the battery 10 is used as an operating power source for the vehicle 1, and can be applied to the electrical system of the vehicle, for example, used to control the working power when the vehicle 1 is started, navigated, or driven. In another embodiment of the present application, the battery 10 not only functions as an operating power source for the vehicle 1, but also functions as a driving power source for the vehicle 1, and can provide driving force to the vehicle 1 as a replacement or partial replacement for gasoline or natural gas.

[0087] The battery may be a battery module or a battery pack, and all references to "battery" below will be described with reference to a "battery pack" as an example.

[0088] 2 to 4 show schematic diagrams of an exploded structure of a battery 10 according to an embodiment of the present application. The battery 10 may include a plurality of battery cells 20, a plurality of first housings 11, and a second housing 12 that houses the plurality of first housings 11. Here, only one first housing 11 is shown in Figs. 3 and 4. The difference between Figs. 3 and 4 is that the positions of electrode terminals 261 of the battery cells 20 are different.

[0089] As shown in Figs. 2 to 4, the inside of the second housing 12 has a hollow structure, and the second housing 12 may house a plurality of first housings 11. To save space in the second housing 12, in some embodiments, the second housing 12 may house a plurality of first housings 11 arranged in one row or one column. In other embodiments, the second housing 12 may house M x N first housings 11, where M is the number of rows in which the first housings 11 are arranged, and N is the number of columns in which the first housings 11 are arranged. For example, 2 Chassis 12 In the case where 5×2 first housings 11 are accommodated in the first housing 11, that is, the first housings 11 may be arranged in five rows, with two first housings in each row. 2 Chassis 12 In the case where 2×5 first housings 11 are housed in the space, that is, the first housings 11 may be provided arranged in two rows with five first housings 11 in each row.

[0090] In some embodiments, the second housing 12 includes a second cover 121 and a second cover plate 122, and the second cover 121 and the second cover plate 122 are fastened to each other. The shape of the second cover 121 and the second cover plate 122 can be determined by the combined shape of a plurality of the first housings 11, and the second cover 121 may have one opening. For example, the second cover 121 may be a hollow rectangular parallelepiped with only one surface being an opening surface, and the second cover plate 122 may fit (cover) the opening of the second cover 121 to form the second housing 12 having a sealed chamber.

[0091] According to different power demands, the number of battery cells 20 may be set to any value. The multiple battery cells 20 may be connected in a 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 grouped and electrically connected, and then the battery cells 20 of each group may be electrically connected to each other for easy installation. The number of battery cells 20 of each group is not limited and may be set as needed.

[0092] 5 is a schematic diagram of an exploded structure of a battery cell 20 according to an embodiment of the present application. As shown in FIG. 5, the battery cell 20 includes an electrode assembly 24 and a housing 25.

[0093] When the internal pressure or temperature of the housing 25 reaches a threshold value, the housing 25 is actuated to release the internal pressure of the housing 25. The housing 25 forms a sealed chamber in which the one or more electrode assemblies 24 are housed. The housing 25 is determined by the shape of the one or more electrode assemblies 24 after being assembled. For example, the housing 25 may be a hollow rectangular parallelepiped, cube, or cylinder. The housing 25 is filled with an electrolyte, e.g., an electrolyte solution. In some embodiments, the housing 25 may be formed of an aluminum plastic film.

[0094] Optionally, as shown in FIG. 5 , the housing 25 of the battery cell 20 may further be provided with a third weak area 251, so that when the internal pressure or temperature of the housing 25 reaches a threshold, the third weak area 251 is broken first, and the waste of the battery cell 20 is discharged from the third weak area 251, thereby realizing directional discharge of the waste of the battery cell 20 and improving the safety of the battery 10.

[0095] 5, each electrode assembly 24 includes two tabs 241, which may be provided on one surface of the electrode assembly 24, for example, the two tabs 241 may be provided on the third surface 23 of the electrode assembly 24. The two tabs 241 may be a positive electrode tab 241a and a negative electrode tab 241b, respectively.

[0096] As shown in FIG. 5, the battery cell 20 further includes two electrode terminals 261, which may be a positive terminal 261a and a negative terminal 261b, respectively.

[0097] According to actual usage needs, the first housing 11 may accommodate one or more battery cells 20. As shown in Figures 3 and 4, the first housing 11 accommodates eight battery cells 20.

[0098] When a plurality of battery cells 20 are housed in the first housing 11, the plurality of battery cells 20 may be selectively arranged in one row or one column in order to save the internal space of the first housing 11. The plurality of battery cells 20 are housed in the first housing 11 in a combination of parallel connection, series connection, or series-parallel connection.

[0099] 3 and 4, in some embodiments, the first housing 11 includes a first cover 111 and a first cover plate 112, and the first cover 111 and the first cover plate 112 are fastened together to form a cavity. The shapes of the first cover 111 and the first cover plate 112 are determined by the combined shape of the battery cells 20, and the first cover 111 may have one opening. For example, the first cover 111 is a hollow rectangular parallelepiped with only one surface being an open surface, and the first cover plate 112 fits (covers) the open surface of the first cover 111 to form the first housing 11 having a chamber.

[0100] There are multiple first housings 11, and in order to realize an electrical connection between a battery cell group in a first housing 11 and a battery cell group in another first housing 11, a channel for transmitting electrical energy between the battery cell groups in the two first housings 11 is provided in the first housing 11. In order to improve the airtightness of the first housing 11, the channel for transmitting electrical energy may be sealed with a sealing member. Here, the battery cell group is an abbreviation for the multiple battery cells 20 housed in the first housing 11.

[0101] 3 and 4, the first housing 11 is provided with a pressure release area 113, which can release the internal pressure of the first housing 11. In this way, when the battery cell 20 is operated, the discharged matter of the battery cell 20 passes through the pressure release area 113 and is discharged from the first housing 11, thereby improving the safety of the battery 10.

[0102] Optionally, when the housing 25 of the battery cell 20 is provided with the third weak area 251, the pressure relief area 113 on the first housing 11 is provided opposite the third weak area 251. In this way, when the battery cell 20 is in operation, the waste of the battery cell 20 can more easily pass through the pressure relief area 113 and be discharged from the first housing 11, thereby improving the safety of the battery 10.

[0103] In some embodiments, as shown in Fig. 3, the pressure release area 113 is provided on the first wall 114 of the first housing 11, the first surface 21 of the battery cell 20 is attached to the first wall 114, and both of the two electrode terminals 261 of the battery cell 20 are provided on the second surface 22, and the second surface 22 is provided opposite to the first surface 21. In some other embodiments, as shown in Fig. 4, the pressure release area 113 is provided on the first wall 114 of the first housing 11, the first surface 21 of the battery cell 20 is attached to the first wall 114, and both of the two electrode terminals 261 of the battery cell 20 are provided on the third surface 23, and the third surface 23 is provided adjacent to the first surface 21.

[0104] By attaching the surface of the battery cell 20 on which the electrode terminal 261 is not provided to the first wall 114 of the first housing 11 in which the pressure release area 113 is provided, when the housing 25 of the battery cell 20 is operated, the discharged matter from the battery cell 20 can be moved further away from the electrode terminal 261, thereby reducing the effect of the discharged matter on the electrode terminal 261, thereby improving the safety of the battery 10.

[0105] In some embodiments, one battery cell 20 may correspond to one pressure relief area 113 .

[0106] In some other embodiments, the plurality of battery cells 20 may correspond to the same pressure release area 113. For example, the plurality of battery cells 20 in one row or one column may correspond to the same pressure release area 113. Also, for example, all the battery cells 20 housed in one first housing 11 correspond to the same pressure release area 113. By providing the same pressure release area 113 for all the battery cells 20 in the first housing 11, when the housing 25 of the battery cells 20 operates, the exhaust of the battery cells 20 in the first housing 11 can be intensively discharged from the first housing 11 along the single pressure release area 113, and the impact on the electrical connection components in the first housing 11 can be reduced, thereby improving the safety of the battery 10. At the same time, the method of realizing this is simple and low cost.

[0107] In some embodiments, as shown in FIG. 6 , the first housing 11 is provided with a first weakened area, which is a pressure release area 113, and which is arranged to be activated to release the internal pressure of the first housing 11 when the internal pressure or temperature of the first housing 11 reaches a threshold value.

[0108] By housing the battery cells 20 in the first housing 11, providing the first housing 11 with a first vulnerable area, and making the first vulnerable area the pressure release area 113, when the device is activated when the internal pressure or temperature of the first housing 11 reaches a threshold, the internal pressure of the first housing 11 can be released through the pressure release area 113, that is, the discharged material is directionally discharged from the first housing 11 through the pressure release area 113, and the explosion of the first housing 11 can be prevented. At the same time, when the battery 10 is operating normally (when the battery 10 is not experiencing thermal runaway), the first vulnerable area can prevent foreign matter (e.g., conductive material) from entering the first housing 11, improving the safety of the battery 10.

[0109] The first weakened area may adopt various configurations that are susceptible to destruction by exudates, and the embodiments of the present application are not limited thereto, and the following description will be given by way of example.

[0110] Optionally, the thickness of the first weakened area is smaller than the thickness of other areas of the wall where the first weakened area is located, so that the first weakened area is easily broken. At the same time, the method of forming such a pressure relief area 113 is simple and convenient.

[0111] For example, the thickness of the first vulnerable region is between 0.4 mm and 3 mm, ensuring that the first vulnerable region is not so thin as to shorten the service life, nor so thick as to require high air pressure to operate, thereby achieving both the service life and safety of the battery 10.

[0112] The pressure relief area 113 may employ a first weakened area of ​​a low melting point material to be susceptible to breakage by the expulsion, such that it can be activated to release the internal pressure of the first housing 11 when the temperature of the first weakened area reaches a threshold value, i.e., the first weakened area has a lower melting point than other areas of the wall in which it is located.

[0113] For example, the melting point of the material used for the first weak region is less than 600° C. In this manner, the first weak region is broken at a relatively low temperature, and the internal pressure of the first housing 11 can be released.

[0114] For example, Fig. 7 is a schematic cross-sectional view of the first housing 11 according to some embodiments of the present application. Alternatively, in one embodiment, as shown in Fig. 7, the first housing 11 is provided with a first groove 115, and the bottom wall of the first groove 115 forms a first weak area. The bottom wall of the first groove 115 is thinner than other areas of the wall of the first groove 115, so that the bottom wall of the first groove 115 is easily broken by the waste. When the housing 25 is operated, the waste can break the bottom wall of the first groove 115 and be discharged from the first housing 11, and the implementation method is simple and low cost.

[0115] 7, the first groove 115 is optionally provided on the fourth surface 1141 of the first housing 11 facing the battery cell 20. That is, the opening of the first groove 115 faces the battery cell 20.

[0116] By providing an opening on the surface of the first housing 11 facing the battery cell 20 to form the first groove 115, a larger gap can be created between the bottom wall of the first groove 115 and the battery cell 20, which contributes to discharging waste from the battery cell 20 into the first groove 115.

[0117] As will be understood, the opening of the first groove 115 may be provided on the side opposite the battery cell 20. In this case, the bottom wall of the first groove 115 is also likely to be damaged by the discharged matter.

[0118] FIG. 8 shows a schematic cross-sectional view of a combination structure of a first housing 11 and a second housing 12 according to an embodiment of the present application. As shown in FIG. 8, the second housing 12 includes an electric cavity 12a, a collecting cavity 12b, and an isolating member 123. One or more first housings 11 may be accommodated in the electric cavity 12a. The collecting cavity 12b is for collecting the discharge from the first housing 11. The isolating member 123 can isolate the electric cavity 12a and the collecting cavity 12b such that the electric cavity 12a and the collecting cavity 12b are provided on both sides of the isolating member 123. The word "isolation" used here means to separate, and does not have to be completely sealed.

[0119] The electrical cavity 12a that accommodates the first housing 11 and the collection cavity 12b that collects the emissions are separated by an isolation member 123, and when the housing 25 of the battery cell 20 in the first housing 11 is operated, the emissions of the battery cell 20 enter the collection cavity 12b, so that no emissions or only a small amount of emissions enter the electrical cavity, thereby realizing separation of the emissions from the battery cell 20, reducing the impact of the emissions from the battery cell 20 (the emissions include gas, combustible substances, metal scraps, etc.) on the electrical connection parts, and preventing short-circuiting between the battery cells 20 due to the emissions from the battery cells 20, thereby improving the safety of the battery 10.

[0120] In some embodiments, in order to facilitate mounting of the second housing 12, the multiple first housings 11 may correspond to the same isolation member 123, that is, the same isolation member 123 is adopted as the isolation member 123 corresponding to the multiple first housings 11, and the method of realizing the isolation member 123 is simple and low cost. For example, the multiple first housings 11 arranged in one row or one column may correspond to the same isolation member 123. Also, for example, all the first housings 11 in the second housing 12 may correspond to the same isolation member 123.

[0121] FIG. 9 shows a schematic cross-sectional view of another combined structure of first housing 11 and second housing 12 according to an embodiment of the present application.

[0122] In some other embodiments, as shown in Fig. 9, the first housing 11 may be a cover having an opening. In this case, the opening forms a pressure release area 113, so that the internal pressure in the first housing 11 can be released through the opening, preventing the first housing 11 from exploding, and improving the safety of the battery 10. Optionally, as shown in Fig. 9, an isolation member 123 may fit (cover) the opening of the first housing 11. By covering the opening of the first housing 11 with the isolation member 123, it is possible to block the substance in the collection cavity 12b from entering the electrical cavity 12a.

[0123] Optionally, the isolation member 123 is arranged such that it can be broken when the pressure relief area 113 relieves the internal pressure of the first housing 11, thereby allowing the discharge from the first housing 11 to pass through the isolation member 123 and into the collection cavity 12b.

[0124] In some embodiments, the pressure relief area 113 on the first housing 11 faces the isolation member 123 so that the pressure relief area 113 can directly impinge on the isolation member 123 when releasing the internal pressure of the first housing 11, thereby making it more likely that the exhaust from the first housing 11 will enter the collection cavity 12b and reducing the likelihood of the exhaust entering the electrical cavity 12a.

[0125] 10 and 11 respectively show cross-sectional schematic diagrams of another combination structure of the first housing 11 and the second housing 12 in the embodiment of the present application. In some embodiments, as shown in Fig. 10 and Fig. 11, the isolation member 123 may be provided with a second weakened area 1231, which is provided opposite the pressure release area 113, and the second weakened area 1231 can be broken when the pressure release area 113 releases the internal pressure, so that the discharged matter of the first housing 11 passes through the isolation member 123 and enters the collection cavity 12b. Here, the difference between Fig. 10 and Fig. 11 is that the first housing 11 in Fig. 11 has an opening.

[0126] By providing the isolation member 123 with a second weak area 1231 corresponding to the pressure release area 113, on the one hand, when the housing 25 of the battery cell 20 is operated, emissions from the first housing 11 can pass through the second weak area 1231 and enter the collection cavity 12b, reducing the possibility of the emissions entering the electrical cavity 12a, and on the other hand, when the housing 25 of the battery cell 20 is not operated, isolation between the electrical cavity 12a and the collection cavity 12b can be ensured, and substances in the collection cavity 12b can be prevented from entering the electrical cavity 12a.

[0127] In some embodiments, one first housing 11 may correspond to one second weak area 1231. For example, as shown in FIG. 2, the second cover plate 122 may be an isolation member 123, and one first housing 11 corresponds to one second weak area 1231 provided on the second cover plate 122. In some other embodiments, a plurality of first housings 11 arranged in one row or one column may correspond to one second weak area 1231. By providing the same second weak areas 1231 of the plurality of first housings 11 arranged in one row or one column, the discharged matter of the battery cells 20 in the first housing 11 can be discharged intensively along the one second weak area 1231, and the impact on the electrical connection components in the first housing 11 can be reduced, thereby improving the safety of the battery 10. At the same time, the method of realization is simple and low cost.

[0128] The second weakened area 1231 may adopt various configurations that contribute to the destruction of waste, and the embodiments of the present application are not limited thereto, and the following description will be given by way of example.

[0129] Optionally, the thickness of the second weakened region 1231 is less than the thickness of other regions of the wall in which the second weakened region 1231 is located. For example, the thickness of the second weakened region 1231 is between 0.4 mm and 3 mm. In this way, it can be ensured that the second weakened region 1231 is not so thin that it shortens the service life, but is not so thick that it requires high air pressure to operate, i.e., the service life and safety of the battery 10 are compatible.

[0130] In addition to adopting a second weakened area 1231 having a relatively small thickness, the second weakened area 1231 may further be adopted with a low melting point material to be easily broken by the effluent, i.e., the second weakened area 1231 has a lower melting point than other areas of the wall where the second weakened area 1231 is located. In this way, the second weakened area 1231 can be easily broken and activated to release the internal pressure of the electrical cavity 12a when the temperature of the second weakened area 1231 reaches a threshold value.

[0131] For example, the melting point of the material adopted by the second weak region 1231 is less than 600° C. In this manner, the second weak region 1231 can be broken at a relatively low temperature to release the internal pressure of the electrical cavity 12a.

[0132] 12 and 13 respectively show cross-sectional schematic diagrams of yet another combined structure of the first housing 11 and the second housing 12 according to an embodiment of the present application. Alternatively, in one embodiment, as shown in FIG. 12 and FIG. 13, the isolation member 123 is provided with a second groove 1232, and the bottom wall 12321 of the second groove 1232 forms a second weak area 1231. The bottom wall 12321 of the second groove 1232 is thinner than other areas of the wall where the second groove 1232 is provided, so that it is easily broken by the waste. When the housing 25 is operated, the waste breaks the bottom wall 12321 of the second groove 1232 and enters the collecting cavity 12b, and the method for achieving this is simple and low cost. Here, the difference between FIG. 12 and FIG. 13 is that the first housing 11 in FIG. 13 has an opening.

[0133] Alternatively, the second groove 1232 is provided on a surface of the isolation member 123 facing the first housing 11. That is, the opening of the second groove 1232 faces the first housing 11. This makes it possible to create a larger gap between the bottom wall of the second groove 1232 and the first housing 11, which contributes to discharging waste from the first housing 11 into the second groove 1232.

[0134] As will be understood, the opening of the second groove 1232 may be provided on the side opposite to the first housing 11. In such a case, the bottom wall of the second groove 1232 is similarly susceptible to being destroyed by the excreted matter.

[0135] In some other embodiments, the second weakened area 1231 may be replaced with a through hole, i.e., the through hole is located opposite the pressure relief area 113, thereby allowing the emissions from the first housing 11 to enter the collection cavity 12b through the through hole, reducing the possibility of the emissions entering the electrical cavity 12a.

[0136] Optionally, the isolating member 123 contains a fluid for providing temperature regulation to the battery cells 20 .

[0137] Specifically, when the pressure release area 113 releases the internal pressure, the isolating member 123 can be broken, and the fluid in the isolating member 123 can be discharged from the inside of the isolating member 123, thus absorbing the heat of the battery cell 20, lowering the temperature of the discharged material, and further reducing the risk of the discharged material. In this case, the fluid and the discharged material cooled by the fluid both enter the collection cavity 12b. Because the cooling of the fluid can quickly lower the temperature of the discharged material of the battery cell 20, the risk of the discharged material entering the collection cavity 12b has already been greatly reduced, and does not have a significant impact on other parts of the battery 10, such as other battery cells 20, thereby timely suppressing the destructiveness caused by the abnormality of the battery cell 20 in the first housing 11, and reducing the possibility of the battery 10 exploding.

[0138] In some embodiments, the isolation member 123 may form a runner for fluid with a thermally conductive material. The fluid flows within the runner and transfers heat through the thermally conductive material to cool the battery cells 20. Optionally, the second weakened area 1231 of the isolation member 123 may be a thin layer of thermally conductive material without any fluid, making it more susceptible to being broken by the effluent. For example, the bottom wall 12321 of the second groove 1232 may be a thin layer of thermally conductive material to form the second weakened area 1231.

[0139] FIG. 14 is a structural schematic diagram of an isolation member 123 according to an embodiment of the present application. Optionally, in some embodiments, as shown in FIG. 14, the isolation member 123 may include a first heat conductive plate 1233 and a second heat conductive plate 1234. The first heat conductive plate 1233 and the second heat conductive plate 1234 form a first runner 1235 for accommodating a fluid. The first heat conductive plate 1233 is attached to the first housing 11. FIG. 15 is a structural schematic diagram of an enlarged A portion of the isolation member 123 shown in FIG. 14. As shown in FIG. 15, the first region 123a of the first heat conductive plate 1233 is recessed into the second heat conductive plate 1234 to form a second recessed groove 1232, and the first region 123a is connected to the second heat conductive plate 1234. In this way, the first runner 1235 is formed around the second groove 1232, but the first runner 1235 is absent within the bottom wall of the second groove 1232, thereby forming the second weak area 1231. Because the isolation member 123 includes the first thermally conductive plate 1233 and the second thermally conductive plate 1234, and the first runner 1235 is formed between the first thermally conductive plate 1233 and the second thermally conductive plate 1234, the manufacturing process of the isolation member 123 is convenient and simple.

[0140] Optionally, the first heat conductive plate 1233 or the second heat conductive plate 1234 on the bottom wall of the second groove 1232 may be removed to form a thinner weakened area. For example, as shown in FIG. 14, the first region 123a is provided with a through hole 1236, and the radial dimension of the through hole 1236 is smaller than the radial dimension of the second groove 1232, that is, the first heat conductive plate 1233 on the bottom wall of the second groove 1232 is removed, and the connection between the first heat conductive plate 1233 and the second heat conductive plate 1234 is maintained at the edge of the bottom of the second groove 1232 to form a first runner 1235 around the second groove 1232.

[0141] Optionally, the second heat conducting plate 1234 corresponding to the through hole 1236 may further be thinned, i.e. the thickness of the second heat conducting plate 1234 corresponding to the through hole 1236 may be made smaller than the thickness of the second heat conducting plate 1234 in other areas, so that the weak area is more susceptible to being destroyed by the emissions. Optionally, the second heat conducting plate 1234 corresponding to the through hole 1236 may be provided with a weak groove.

[0142] Optionally, in some embodiments, the battery 10 may further include a protective member for protecting the isolating member 123, and the collecting cavity 12b may be defined by the isolating member 123 and the protective member. In some embodiments, the protective member may define a part of the wall of the second housing 12.

[0143] The collecting cavity 12b formed by the protective member and the isolating member 123 does not occupy a space capable of accommodating the battery cells 20, so that the collecting cavity 12b having a relatively large space can be provided, which can effectively collect and buffer the discharged material and reduce the risk of the discharged material. At the same time, the protective member can provide a protective effect for the isolating member 123 and prevent the isolating member 123 from being destroyed by foreign objects.

[0144] Optionally, in some embodiments, a further fluid, such as a cooling medium, may be provided in the collection cavity 12b or a member for containing the fluid may be provided to further reduce the temperature of the effluent entering the collection cavity 12b.

[0145] Optionally, in some embodiments, the collection cavity 12b may be a sealed chamber. For example, the connection between the protective member and the isolation member 123 may be sealed with a sealing member. The collection cavity 12b formed by the isolation member 123 and the protective member may be provided as a sealed chamber by the sealing member, thereby blocking the material in the collection cavity 12b from entering the electrical cavity 12a.

[0146] Alternatively, the battery 10 may further include other structures, but these will not be described here. For example, as shown in Figs. 3 and 4, the battery 10 may further include a harness separator 50 housed in the first housing 11 and for mounting a bus member. Here, the bus member is for realizing electrical connection between the multiple battery cells 20, for example, parallel connection, series connection, or series-parallel connection. For example, as shown in Figs. 3 and 4, the battery 10 may further include a side plate 60 housed in the first housing 11, and the side plate 60 may be provided surrounding the battery cells 20. The side plate 60 may be provided with a second runner 61 for housing a fluid and regulating the temperature of the battery cells 20.

[0147] In one embodiment of the present application, an electric device is further provided, which may include the battery 10 in any of the above-mentioned embodiments. Optionally, the electric device may be a vehicle 1, a ship or a spacecraft.

[0148] As described above, the battery 10 and the electric device of the embodiment of the present application have been described. The manufacturing method and the device of the battery of the embodiment of the present application will be described below. For the parts that are not described in detail, please refer to the above-mentioned embodiments.

[0149] 16 shows a schematic flow chart of a battery manufacturing method 200 according to an embodiment of the present application. As shown in FIG. 16, the method 200 may include the following steps.

[0150] At S210, a plurality of battery cells are provided having a housing configured to be actuated to release internal pressure of the housing when an internal pressure or temperature of the housing reaches a threshold value.

[0151] In S220, a plurality of first housings are provided for housing at least one battery cell among the plurality of battery cells, the first housings including a pressure release area for releasing an internal pressure of the first housing.

[0152] In S230, a second housing is provided for housing the plurality of first housings.

[0153] 17 is a schematic block diagram of a battery manufacturing apparatus 300 according to an embodiment of the present application. As shown in FIG. 17, the battery manufacturing apparatus 300 may include a providing module 310.

[0154] The providing module 310 is used for providing a plurality of battery cells having a housing configured to activate and release internal pressure of the housing when an internal pressure or temperature of the housing reaches a threshold value, providing a plurality of first housings for accommodating at least one battery cell of the plurality of battery cells, the first housings including a pressure release region for releasing internal pressure of the first housing, and providing a second housing for accommodating the plurality of first housings.

[0155] Although the present application has been described with reference to the preferred embodiments, various modifications can be made and the elements thereof can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural contradiction, any of the various technical features described in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims. [Explanation of symbols]

[0156] 1-Vehicle 10-battery 11-1st cabinet 111-1st cover 112-First cover plate 113-Pressure relief area 114-1st wall 1141-4th surface 115-1st groove 12-Second housing 12a-Electric Cavity 12b-Collecting cavity 121-2nd Cover 122-Second cover plate 123-Isolation material 1231-Second vulnerable area 1232-Second concave groove 12321 - Bottom wall of second groove 1233-First heat conductive plate 1234-Second heat conductive plate 1235-First Runner 1236-Through hole 123a-first area 20-Battery Cell 21-1st surface 22-Second surface 23-Third surface 24-electrode assembly 241-Tab 241a-Positive electrode tab 241b-Negative electrode tab 25-Housing 251-Third vulnerable area 261-electrode terminal 261a-Positive terminal 261b-Negative terminal 30-Controller 40-Motor 50-Harness separator 60-Side Panel 61-Second runner 310-Provided Module.

Claims

1. a plurality of battery cells (20) having a housing (25) configured to be activated to release internal pressure of the housing (25) when the internal pressure or temperature of the housing (25) reaches a threshold value; a plurality of first housings (11) for accommodating at least one battery cell (20) among the plurality of battery cells (20), the first housings (11) including a pressure release area (113) for releasing internal pressure of the first housing (11); A second housing (12) for housing the plurality of first housings (11); Equipped with The second housing (12) comprises an electrical cavity (12a) for accommodating the plurality of first housings (11), a collection cavity (12b) for collecting discharge from the first housings (11), and an isolation member (123) for isolating the electrical cavity (12a) and the collection cavity (12b) such that the electrical cavity (12a) and the collection cavity (12b) are provided on either side of the isolation member (123).

2. 2. The battery of claim 1, wherein the pressure relief area (113) faces the separator member (123).

3. 3. The battery of claim 2, wherein the first housing (11) is a cover having an opening that forms the pressure relief area (113), and the isolation member (123) covers the opening.

4. 3. The battery of claim 2, wherein the first housing (11) has a cavity for accommodating the battery cell (20), and the pressure release area (113) is a first weakened area of ​​the first housing (11), the first weakened area being arranged to activate and release the internal pressure of the cavity when the internal pressure or temperature of the cavity reaches a threshold value.

5. 5. The battery of claim 4, wherein the thickness of the first area of ​​weakness is less than the thickness of other areas of the wall in which the first area of ​​weakness is located.

6. 6. The battery of claim 4 or 5, wherein the first area of ​​weakness has a lower melting point than other areas of the wall in which the first area of ​​weakness is located, the melting point of the material of the first area of ​​weakness being less than 600°C.

7. The battery according to any one of claims 4 to 6, wherein the first housing (11) has a first groove (115) whose bottom wall is the first weak area, and the opening of the first groove (115) faces the battery cell (20).

8. The battery of any one of the preceding claims, wherein the isolation member (123) is arranged to contain a fluid to regulate the temperature of the battery cells (20).

9. 9. The battery of claim 8, wherein the isolation member (123) is positioned such that the pressure relief area (113) can be ruptured upon releasing the internal pressure, thereby allowing the fluid to be expelled from within the isolation member (123).

10. The isolating member (123) is A first heat conductive plate (1233) attached to the first housing (11); a second heat conductive plate (1234) provided on a side of the first heat conductive plate (1233) away from the first housing (11); a first runner (1235) formed between the first heat conductive plate (1233) and the second heat conductive plate (1234) for the fluid to flow; 10. The battery of claim 9 comprising:

11. The battery according to any one of claims 1 to 10, wherein the isolation member (123) is provided with a through hole (1236) facing the pressure release area (113) and used for allowing the discharged matter of the first housing (11) to pass through and enter the collection cavity (12b).

12. The battery of any one of claims 1 to 10, wherein the isolation member (123) is arranged to be rupturable when the pressure release area (113) releases the internal pressure, thereby allowing the discharged matter of the first housing (11) to pass through the isolation member (123) and into the collection cavity (12b).

13. 13. The battery of claim 12, wherein the isolation member (123) is provided with a second weakened area (1231) facing the pressure release area (113) and arranged to be breakable by the exhaust of the first housing (11), such that the exhaust of the first housing (11) passes through the second weakened area (1231) and enters the collection cavity (12b).

14. 14. The battery of claim 13, wherein the thickness of the second weakened area (1231) is less than the thickness of other areas of the wall in which the second weakened area (1231) is located and / or the second weakened area (1231) has a lower melting point than other areas of the wall in which the second weakened area (1231) is located.

15. The battery according to any one of claims 13 to 14, wherein the separator (123) is provided with a second groove (1232) whose bottom wall (12321) is the second weakened area (1231).

16. The battery of claim 15, wherein an opening of the second groove (1232) faces the first housing (11).

17. The battery according to any one of claims 1 to 16, wherein a plurality of the first housings (11) correspond to the same isolating member (123).

18. 2. The battery of claim 1, wherein the pressure release area (113) is provided on a first wall (114) of the first housing (11), a first surface (21) of the battery cell (20) is attached to the first wall (114), and all electrode terminals (261) of the battery cell (20) are provided on a second surface (22) opposite the first surface (21).

19. The battery according to any one of claims 1 to 18, wherein all of the battery cells (20) contained within one of the first housings (11) correspond to the same pressure release area (113).

20. The battery according to any one of claims 1 to 19, further comprising a protective member arranged to protect the isolating member (123) and to form a collection cavity (12b) between the protective member and the isolating member (123).

21. 21. The battery of claim 20, further comprising a sealing member disposed between the isolation member (123) and the protective member for sealing the collection cavity (12b).

22. An electrical device comprising a battery according to any one of claims 1 to 21.

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