Batteries, electrical devices, methods and apparatus for manufacturing batteries

Abstract

A battery, an electrical device, a method for manufacturing the battery, and an apparatus are provided. The battery (10) includes: a plurality of battery cells (20), each battery cell (20) having a housing (25) configured to be actuated to release the internal pressure of the housing (25) when the internal pressure or temperature of the housing (25) reaches a threshold; a plurality of first housings (11), each first housing (11) for accommodating at least one of the plurality of battery cells (20), each first housing (11) including a pressure relief region (113) for releasing the internal pressure of the first housing (11); and a second housing (12) for accommodating the plurality of first housings (11), thereby enhancing the safety of the battery (10).

Description

[0001] This application is a divisional application of the invention application filed on March 15, 2021, with Chinese application number 202180000846.3 and titled "Battery, Electrical Device, Method and Apparatus for Preparing a Battery". Technical Field

[0002] This application relates to the field of battery technology, and in particular to a battery, an electrical device, a method and apparatus for manufacturing a battery. Background Technology

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0004] In the development of battery technology, besides improving battery performance, safety is also a crucial issue that cannot be ignored. If battery safety cannot be guaranteed, it will pose a significant threat to the lives and property of passengers. How to enhance battery safety is a pressing technical problem that needs to be solved in battery technology. Summary of the Invention

[0005] This application provides a battery, an electrical device, a method and apparatus for manufacturing a battery, which can enhance battery safety.

[0006] In a first aspect, a battery is provided, comprising: a plurality of battery cells, each battery cell having a housing configured to actuate to release internal pressure when an internal pressure or temperature of the housing reaches a threshold; a plurality of first housings for housing at least one of the plurality of battery cells, each first housing including a pressure relief region for releasing internal pressure within the first housing; and a second housing for housing the plurality of first housings.

[0007] The technical solution of this application embodiment houses a battery cell with a casing within a first housing containing a pressure relief area, and multiple first housings are disposed within a second housing. Therefore, when a battery cell in one of the first housings experiences thermal runaway (a rapid increase in internal pressure and temperature after thermal runaway), and the internal pressure or temperature of the battery cell reaches a threshold, the casing of the battery cell will actuate, releasing the internal pressure of the battery cell into the first housing. Since there are multiple independent first housings, the impact of emissions and heat generated by a battery cell in one first housing on battery cells in other first housings is greatly reduced, thereby improving battery safety. Furthermore, the first housing includes a pressure relief area that can release internal pressure, thus preventing the first housing from exploding after a battery cell experiences thermal runaway, further enhancing battery safety.

[0008] In some embodiments, the second housing includes an electrical cavity, a collection cavity, and an isolation component. The electrical cavity is used to accommodate the plurality of first housings, the collection cavity is used to collect emissions from the first housings, and the isolation component is used to isolate the electrical cavity and the collection cavity such that the electrical cavity and the collection cavity are disposed on opposite sides of the isolation component.

[0009] By using an isolation component to separate the electrical cavity containing the first housing from the collection cavity for collecting emissions, when the casing of the battery cell in the first housing is actuated, the emissions from the battery cell enter the collection cavity, preventing or minimizing the emissions from entering the electrical cavity. This achieves separation of emissions from the battery cell, thereby reducing the impact of the emissions from the battery cell (which may contain gases, combustibles, metal shavings, etc.) on electrical connection components and preventing short circuits between battery cells caused by the emissions from the battery cell. Therefore, it can enhance battery safety.

[0010] In some embodiments, the pressure relief area faces the isolation component.

[0011] Because the pressure relief area faces the isolation component, the emissions released from the pressure relief area can directly rush towards the isolation component, making it easier for the emissions to enter the collection chamber and reducing the possibility of the emissions entering the electrical chamber.

[0012] In some embodiments, the first housing is a cover with an opening that forms the pressure relief area.

[0013] Because the opening forms a pressure relief area, the internal pressure inside the first casing can be released through the opening, preventing the first casing from exploding and improving the battery's safety performance.

[0014] In some embodiments, the insulating component covers the opening.

[0015] By covering the opening of the first housing with an isolation component, it is possible to prevent substances in the collection chamber from entering the electrical chamber.

[0016] In some embodiments, the first housing has a cavity for accommodating the battery cell, and the pressure relief area is a first weak point of the first housing, the first weak point being configured to be actuated when the internal pressure or temperature of the cavity reaches a threshold to release the internal pressure of the cavity.

[0017] The battery cells are housed in a first housing, and a first weak zone is provided on the first housing as a pressure relief area. When the pressure or temperature inside the first housing reaches a threshold, the first weak zone is activated, allowing the internal pressure of the first housing to be released through the pressure relief area. This means that pollutants can be directed out of the first housing through the pressure relief area, preventing the first housing from exploding. Simultaneously, when the battery is in normal operating condition (without thermal runaway), the first weak zone can prevent foreign objects (such as conductive materials) from entering the first housing, improving the battery's safety performance.

[0018] In some embodiments, the thickness of the first weak zone is less than the thickness of other areas of the wall where the first weak zone is located.

[0019] Because the thickness of the first weak zone is less than the thickness of other areas of the wall where the first weak zone is located, the first weak zone is easily damaged. At the same time, this method of forming a pressure relief zone is simple and convenient.

[0020] In some embodiments, the thickness of the first weak region is 0.4 mm to 3 mm.

[0021] Since the thickness of the first weak zone is 0.4mm-3mm, it can be ensured that the first weak zone is not too thin, which would shorten the service life, nor too thick, which would require the first weak zone to be activated under high air pressure, thus balancing the battery's service life and safety performance.

[0022] In some embodiments, the first weak region has a lower melting point than other regions of the wall in which the first weak region is located.

[0023] Because the first weak zone has a lower melting point than other areas of the wall where it is located, it is easily damaged. This allows the first weak zone to be actuated when its temperature reaches a threshold, thereby releasing the internal pressure of the first housing.

[0024] In some embodiments, the melting point of the material in the first weak region is below 600°C.

[0025] Since the melting point of the material in the first weak zone is below 600°C, the first weak zone can be destroyed at a lower temperature, thereby releasing the internal pressure of the first chamber.

[0026] In some embodiments, the first housing is provided with a first groove, and the bottom wall of the first groove is the first weak area.

[0027] By setting a first groove on the first housing, the bottom wall of the first groove is used as the first weak area, which is a simple and low-cost method.

[0028] In some embodiments, the opening of the first groove faces the battery cell.

[0029] By creating an opening on the side surface of the first housing facing the battery cell to form a first groove, a larger gap can be created between the bottom wall of the first groove and the battery cell, making it easier for the discharge from the battery cell to be discharged into the first groove.

[0030] In some embodiments, the isolation component is configured to contain fluid to regulate the temperature of the battery cell.

[0031] By configuring the isolation component to contain fluid to regulate the temperature of the battery cell, it is possible to heat or cool the battery cell using the isolation component, thereby regulating the temperature of the battery cell.

[0032] In some embodiments, the isolation component is configured to be breached when the internal pressure is released in the pressure relief area, so that the fluid is discharged from the interior of the isolation component.

[0033] When the internal pressure is released in the pressure relief area, the isolation component is destroyed, and fluid is discharged from the inside of the isolation component. This allows the fluid to cool the emissions from the battery cells, reducing the danger of the emissions.

[0034] In some embodiments, the isolation component includes: a first heat-conducting plate attached to the first housing; a second heat-conducting plate disposed on the side of the first heat-conducting plate away from the first housing; and a first flow channel formed between the first heat-conducting plate and the second heat-conducting plate for the fluid to flow therethrough.

[0035] Since the isolation component includes a first heat-conducting plate and a second heat-conducting plate, and a first flow channel is formed between the first heat-conducting plate and the second heat-conducting plate, the manufacturing process of the isolation component is convenient and simple.

[0036] In some embodiments, the isolation component is provided with a through hole, which is disposed opposite to the pressure relief area, and the through hole is used to allow the discharge from the first housing to pass through so that the discharge enters the collection chamber.

[0037] The through-hole is positioned opposite to the pressure relief area, allowing the discharge from the first chamber to pass through the through-hole and enter the collection chamber, making it easier for the discharge to enter the collection chamber and reducing the possibility of the discharge entering the electrical chamber.

[0038] In some embodiments, the isolation component is configured to be breached when the internal pressure is released in the pressure relief area, so that the discharge from the first housing passes through the isolation component into the collection chamber.

[0039] Because the isolation component can be destroyed when the internal pressure is released in the pressure relief area, the discharge from the first chamber can pass through the isolation component and enter the collection chamber, making it easier for the discharge to enter the collection chamber and reducing the possibility of the discharge entering the electrical chamber.

[0040] In some embodiments, the isolation component is provided with a second weak zone, which is disposed opposite to the pressure relief area. The second weak zone is configured to be disrupted by the discharge from the first housing, so that the discharge from the first housing passes through the second weak zone and enters the collection chamber.

[0041] By setting a second weak zone corresponding to the pressure relief area in the isolation component, on the one hand, when the battery cell casing is actuated, the emissions from the first housing can pass through the second weak zone and enter the collection chamber, reducing the possibility of emissions entering the electrical cavity; on the other hand, it can ensure the isolation between the electrical cavity and the collection chamber when the battery cell casing is not actuated, preventing substances in the collection chamber from entering the electrical cavity.

[0042] In some embodiments, the thickness of the second weak zone is less than the thickness of other areas of the wall in which the second weak zone is located.

[0043] Because the thickness of the second weak zone is less than the thickness of other areas of the wall where the second weak zone is located, the second weak zone is easily damaged.

[0044] In some embodiments, the thickness of the second weak region is 0.4 mm to 3 mm.

[0045] Since the thickness of the second weak zone is 0.4mm-3mm, it can be ensured that the second weak zone is not too thin, which would shorten the service life, nor too thick, which would require the second weak zone to be activated under high air pressure, thus balancing the battery's service life and safety performance.

[0046] In some embodiments, the second weak region has a lower melting point than other regions of the wall in which the second weak region is located.

[0047] Because the second weak zone has a lower melting point than other areas of the wall where it is located, it is easily damaged. This allows the temperature of the second weak zone to reach a threshold, which can then be actuated to release the internal pressure of the discharge chamber.

[0048] In some embodiments, the melting point of the material in the second weak region is below 600°C.

[0049] Since the melting point of the material in the second weak zone is below 600°C, the second weak zone can be destroyed at a lower temperature, thereby releasing the internal pressure of the gas chamber.

[0050] In some embodiments, the isolation component is provided with a second groove, the bottom wall of which is the second weak area.

[0051] By setting a second groove on the isolation component, the bottom wall of the second groove is used as the second weak zone, which is simple and low in cost.

[0052] In some embodiments, the opening of the second groove faces the first housing.

[0053] By creating an opening on the side surface of the isolation component 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, making it easier for the waste from the first housing to be discharged into the second groove.

[0054] In some embodiments, multiple first enclosures correspond to the same isolation component.

[0055] Using the same isolation component for multiple first enclosures is a simple and low-cost method.

[0056] In some embodiments, the pressure relief area is disposed on the first wall of the first housing, the first surface of the battery cell is attached to the first wall, and all electrode terminals of the battery cell are disposed on the second surface, the second surface being disposed opposite to the first surface.

[0057] By attaching the surface of the battery cell without electrode terminals to the first wall of the first housing with a pressure relief area, the emissions from the battery cell are further away from the electrode terminals when the battery cell casing is actuated, thereby reducing the impact of the emissions on the electrode terminals and thus enhancing battery safety.

[0058] In some embodiments, all the battery cells housed within a first housing correspond to the same pressure relief area.

[0059] By setting the pressure relief area of ​​all battery cells within the first housing to the same location, when the battery cell casing is actuated, the effluent from the battery cells in the first housing can be concentrated and discharged along a single pressure relief area, thereby reducing the impact on the electrical connection components within the first housing and enhancing battery safety. Furthermore, this method is simple and low-cost.

[0060] In some embodiments, the first housing contains a plurality of battery cells in a single row or column.

[0061] Arranging multiple battery cells in a single row or column within the first housing can save internal space.

[0062] In some embodiments, the battery further includes a protective member configured to protect the isolation component, wherein the collection cavity is formed between the protective member and the isolation component.

[0063] The collection chamber formed by the protective components and the isolation components can effectively collect and buffer the emissions, reducing their hazard. At the same time, the protective components can protect the isolation components from damage by foreign objects.

[0064] In some embodiments, the battery further includes a sealing member disposed between the isolation member and the protective member to seal the collection chamber.

[0065] By using a sealing component to set the collection chamber formed by the isolation component and the protective component into a closed chamber, the material inside the collection chamber can be prevented from entering the electrical cavity.

[0066] In a second aspect, an electrical device is provided, comprising a battery as described in the first aspect.

[0067] Thirdly, a method for manufacturing a battery is provided, comprising: providing a plurality of battery cells, each battery cell having a housing, the housing being configured to actuate to release the internal pressure of the housing when the internal pressure or temperature of the housing reaches a threshold; a plurality of first housings for accommodating at least one of the plurality of battery cells, each first housing including a pressure relief region for releasing the internal pressure of the first housing; and a second housing for accommodating the plurality of first housings.

[0068] Fourthly, an apparatus for manufacturing a battery is provided, comprising: a providing module for: providing a plurality of battery cells, each battery cell having a housing, the housing being configured to actuate to release the internal pressure of the housing when the internal pressure or temperature of the housing reaches a threshold; providing a plurality of first housings for housing at least one of the plurality of battery cells, each first housing including a pressure relief region for releasing the internal pressure of the first housing; and providing a second housing for housing the plurality of first housings. Attached Figure Description

[0069] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0070] Figure 1 This is a schematic diagram of the structure of a vehicle disclosed in one embodiment of this application;

[0071] Figures 2-4 This is an exploded structural diagram of a battery disclosed in some embodiments of this application;

[0072] Figure 5 This is an exploded structural diagram of a battery cell disclosed in an embodiment of this application;

[0073] Figure 6 and Figure 7 This is a cross-sectional schematic diagram of the first housing disclosed in some embodiments of this application;

[0074] Figures 8-13 This is a cross-sectional schematic diagram of the combined structure of the first and second housings disclosed in some embodiments of this application;

[0075] Figure 14 This is a schematic diagram of the structure of the isolation component disclosed in an embodiment of this application;

[0076] Figure 15 yes Figure 14 An enlarged structural diagram of part A of the isolation component shown;

[0077] Figure 16 This is a schematic flowchart illustrating a method for preparing a battery according to one embodiment of this application;

[0078] Figure 17 This is a schematic block diagram of an apparatus for preparing a battery according to one embodiment of this application;

[0079] The accompanying drawings are not drawn to scale.

[0080] Marker explanation:

[0081] 1-Vehicle; 10-Battery; 11-First housing; 111-First cover; 112-First cover plate; 113-Pressure relief area; 114-First wall; 1141-Fourth surface; 115-First groove; 12-Second housing; 12a-Electrical cavity; 12b-Collection cavity; 121-Second cover; 122-Second cover plate; 123-Isolation component; 1231-Second weak area; 1232-Second groove; 12321-Bottom wall of the second groove; 1233-First heat-conducting plate; 1234-Second heat-conducting plate; 12 35-First flow channel; 1236-Through hole; 123a-First region; 20-Battery cell; 21-First surface; 22-Second surface; 23-Third surface; 24-Electrode assembly; 241-Taper; 241a-Positive tab; 241b-Negative tab; 25-Housing; 251-Third weak area; 261-Electrode terminal; 261a-Positive electrode terminal; 261b-Negative electrode terminal; 30-Controller; 40-Motor; 50-Wire harness isolation plate; 60-Side plate; 61-Second flow channel; 310-Supply module. Detailed Implementation

[0082] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0083] In the description of this application, it should be noted that, unless otherwise stated, "multiple" means two or more (including two); the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0084] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0085] In this application, the battery cell may include lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to this. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, cuboid / square battery cells, and pouch battery cells, and the embodiments of this application are not limited to this.

[0086] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and / or capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery module is generally formed by connecting one or more battery cells in series, parallel, or a combination thereof. A battery pack generally includes one or more battery modules and includes a housing for encapsulating the battery modules. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. The battery cell mentioned in the embodiments of this application refers to the smallest unit module capable of independent charging and discharging.

[0087] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. To ensure that high currents can be carried without melting, multiple positive electrode tabs and multiple negative electrode tabs are stacked together. The tabs are electrically connected to electrode terminals, which generally include positive and negative electrode terminals. Multiple battery cells are connected in series and / or parallel via a busbar for various applications. The separator can be made of PP or PE, etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0088] The term "cell battery" as used below refers to "soft-pack cell battery".

[0089] In addition to electrode components and electrolyte, a pouch cell also includes a casing, which can be understood as an outer packaging. The casing can be an aluminum-plastic film. This casing can be actuated to release internal pressure or temperature when the internal pressure or temperature of the cell reaches a predetermined threshold. This threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the cell.

[0090] The term "actuation" as used in this application refers to the casing being activated or brought to a certain state, thereby releasing the internal pressure and temperature of the battery cell casing. The activation of the casing may include, but is not limited to, at least a portion of the casing ruptures, breaks, or tears. After activation, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief within the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0091] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive or negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0092] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, battery safety also needs to be considered.

[0093] Current battery designs primarily focus on releasing the high pressure and heat inside the battery cell casing, essentially venting emissions to the outside of the cell. Furthermore, these high-temperature, high-pressure emissions are released in all directions around the battery cell. The power and destructive force of these emissions can be significant, potentially triggering thermal runaway in other battery cells and causing further safety issues.

[0094] In view of this, this application provides a technical solution in which a battery cell with a casing is housed in a first housing with a pressure relief area, and multiple first housings are arranged in a second housing. Therefore, when a battery cell in one of the first housings experiences thermal runaway (after thermal runaway, the internal pressure and temperature of the battery cell rise sharply), and the internal pressure or temperature of the battery cell reaches a threshold, the casing of the battery cell will actuate and release the internal pressure of the battery cell to the outside of the first housing. Since there are multiple independent first housings, the emissions and heat generated when a battery cell in one first housing experiences thermal runaway will have a significantly reduced impact on the battery cells in other first housings, thereby improving battery safety. Furthermore, the first housing includes a pressure relief area that can release the internal pressure of the first housing, thereby preventing the first housing from exploding after a battery cell experiences thermal runaway, further improving battery safety.

[0095] The technical solutions described in the embodiments of this application are applicable to various battery-powered devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, electric vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0096] It should be understood that the technical solutions described in the embodiments of this application are not limited to the devices described above, but can also be applied to all devices that use batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0097] For example, such as Figure 1The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 30, and a battery 10 can be installed inside vehicle 1. The controller 30 controls the battery 10 to supply power to the motor 40. For example, the battery 10 can be installed at the bottom, front, or rear of vehicle 1. The battery 10 can be used to power vehicle 1; for example, it can serve as the operating power source for the vehicle 1's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0098] A battery can be a battery module or a battery pack. In the following text, the term "battery" will be used to refer to a "battery pack".

[0099] Figures 2 to 4 An exploded view of a battery 10 according to an embodiment of this application is shown. 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. Figure 3 and Figure 4 Only one first box 11 is shown in the image. Figure 3 and Figure 4 The difference lies in the different positions of the electrode terminals 261 of the battery cell 20.

[0100] like Figures 2 to 4 As shown, the interior of the second box 12 is hollow, and it can accommodate multiple first boxes 11. To save space in the second box 12, in some embodiments, the second box 12 can accommodate multiple first boxes 11 arranged in a single row or a single column. In other embodiments, the second box 12 can accommodate M×N first boxes 11, where M is the number of rows of the first boxes 11 and N is the number of columns of the first boxes 11. For example, the first box 11 can accommodate 5×2 first boxes 11, that is, the first boxes 11 can be arranged in 5 rows, with 2 first boxes 11 in each row; or, the first box 11 can accommodate 2×5 first boxes 11, that is, the first boxes 11 can be arranged in 2 rows, with 5 first boxes 11 in each row.

[0101] In some embodiments, the second housing 12 includes a second cover 121 and a second cover plate 122, which are fastened together. The shapes of the second cover 121 and the second cover plate 122 can be determined according to the shape of a combination of multiple first housings 11, and the second cover 121 may have an opening. For example, the second cover 121 may be a hollow cuboid with only one side being an opening, and the second cover plate 122 covers (or encloses) the opening of the second cover 121 to form a second housing 12 with a closed chamber.

[0102] The number of battery cells 20 can be set to any value depending on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or mixed to achieve a larger capacity or power. Since each battery 10 may contain a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped and electrically connected first, and then the groups of battery cells 20 can be electrically connected to each other. The number of battery cells 20 in each group is unlimited and can be set according to requirements.

[0103] Figure 5 This is an exploded view of the structure of a battery cell 20 provided in one embodiment of this application. Figure 5 As shown, the battery cell 20 includes an electrode assembly 24 and a housing 25.

[0104] When the internal pressure or temperature of the housing 25 reaches a threshold, the housing 25 is actuated to release the internal pressure. The housing 25 forms a closed cavity that houses one or more electrode assemblies 24. The shape of the housing 25 depends on the combination of the one or more electrode assemblies 24; for example, the housing 25 can be a hollow cuboid, cube, or cylinder. The housing 25 is filled with an electrolyte, such as an electrolyte solution. In some embodiments, the housing 25 can be formed from an aluminum-plastic film.

[0105] Optionally, such as Figure 5 As shown, a third weak zone 251 can also be provided on the casing 25 of the battery cell 20, so that when the internal pressure or temperature of the casing 25 reaches a threshold, the third weak zone 251 is damaged first, and then the emissions of the battery cell 20 are discharged from the third weak zone 251, realizing the directional discharge of the emissions of the battery cell 20 and improving the safety performance of the battery 10.

[0106] like Figure 5 As shown, each electrode assembly 24 includes two tabs 241, which can be disposed on one surface of the electrode assembly 24, for example, on the third surface 23 of the electrode assembly 24. The two tabs 241 can be a positive tab 241a and a negative tab 241b, respectively.

[0107] like Figure 5As shown, the battery cell 20 also includes two electrode terminals 261, which can be a positive electrode terminal 261a and a negative electrode terminal 261b, respectively.

[0108] Depending on actual usage requirements, the first housing 11 can accommodate one or more individual battery cells 20. For example, 3 and... Figure 4 As shown, the first housing 11 contains 8 battery cells 20.

[0109] When multiple battery cells 20 are housed in the first housing 11, optionally, in order to save internal space of the first housing 11, the multiple battery cells 20 can be arranged in a single row or a single column. The multiple battery cells 20 are housed in the first housing 11 after being connected in parallel, series, or mixed.

[0110] In some embodiments, such as Figure 3 and Figure 4 As shown, the first housing 11 includes a first cover 111 and a first cover plate 112, which are fastened together to form a cavity. The shapes of the first cover 111 and the first cover plate 112 can be determined according to the shape of the battery cells 20 assembly. The first cover 111 may have an opening. For example, the first cover 111 may be a hollow cuboid with only one side being an opening. The first cover plate 112 covers (or encloses) the opening of the first cover 111, forming a first housing 11 with a cavity.

[0111] There are multiple first housings 11. To enable electrical connection between battery cell groups within one first housing 11 and battery cell groups within other first housings 11, channels for transmitting electrical energy between battery cell groups within two first housings 11 are provided on the first housing 11. To improve the sealing performance of the first housing 11, the channels for transmitting electrical energy can be sealed with sealing materials. Here, "battery cell group" is a shorthand for the multiple battery cells 20 housed in the first housing 11.

[0112] In addition, such as Figure 3 and Figure 4 As shown, a pressure relief area 113 is provided on the first housing 11, which can release the internal pressure of the first housing 11. In this way, when the battery cell 20 is actuated, the emissions from the battery cell 20 can be discharged from the first housing 11 through the pressure relief area 113, thereby improving the safety performance of the battery 10.

[0113] Optionally, when a third weak zone 251 is provided on the casing 25 of the battery cell 20, the pressure relief area 113 on the first housing 11 and the third weak zone 251 are arranged opposite to each other. In this way, when the battery cell 20 is actuated, the emissions from 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 performance of the battery 10.

[0114] In some embodiments, such as Figure 3 As shown, the pressure relief area 113 is disposed 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 electrode terminals 261 of the battery cell 20 are disposed on the second surface 22, which is opposite to the first surface 21. In other embodiments, such as Figure 4 As shown, the pressure relief area 113 is disposed 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 the two electrode terminals 261 of the battery cell 20 are disposed on the third surface 23, which is adjacent to the first surface 21.

[0115] By attaching the surface of the battery cell 20 without electrode terminals 261 to the first wall 114 of the first housing 11 with a pressure relief area 113, the emissions from the battery cell 20 are further away from the electrode terminals 261 when the housing 25 of the battery cell 20 is actuated, thereby reducing the impact of the emissions on the electrode terminals 261 and thus enhancing the safety of the battery 10.

[0116] In some embodiments, a single battery cell 20 may correspond to a pressure relief region 113.

[0117] In other embodiments, multiple battery cells 20 may correspond to the same pressure relief region 113. For example, multiple battery cells 20 arranged in a single row or column may correspond to the same pressure relief region 113. Alternatively, all battery cells 20 housed within a first housing 11 may correspond to the same pressure relief region 113. By setting the pressure relief region 113 of all battery cells 20 within the first housing 11 to the same location, when the housing 25 of a battery cell 20 is actuated, the emissions from the battery cells 20 within the first housing 11 can be concentrated and discharged along a single pressure relief region 113, thereby reducing the impact on electrical connection components within the first housing 11 and thus enhancing the safety of the battery 10. Furthermore, this method is simple and low-cost.

[0118] In some embodiments, such as Figure 6 As shown, a first weak area is provided on the first housing 11, which is used as a pressure relief area 113. The first weak area is configured to be actuated when the internal pressure or temperature of the first housing 11 reaches a threshold, so as to release the internal pressure of the first housing 11.

[0119] The battery cell 20 is housed in the first housing 11, and a first weak zone is provided on the first housing 11, which serves as a pressure relief area 113. When the internal pressure or temperature of the first housing 11 reaches a threshold, it is activated, and the internal pressure of the first housing 11 can be released through the pressure relief area 113. That is, the exhaust material can be directionally discharged from the first housing 11 through the pressure relief area 113, preventing the first housing 11 from exploding. At the same time, when the battery 10 is in normal operating condition (the battery 10 has not experienced thermal runaway), the first weak zone can prevent foreign objects (such as conductive materials) from entering the first housing 11, improving the safety performance of the battery 10.

[0120] The first weak zone can be configured in various ways to facilitate the destruction of emissions. This application does not limit this in its embodiments, but will illustrate with examples below.

[0121] Optionally, the thickness of the first weak zone is less than the thickness of other areas of the wall where the first weak zone is located, so the first weak zone is easily damaged. At the same time, this method of forming the pressure relief zone 113 is simple and convenient.

[0122] For example, the thickness of the first weak zone is 0.4mm-3mm, which ensures that the first weak zone is not too thin and thus shortens the service life, nor too thick and thus requires high air pressure to activate, thus balancing the service life and safety performance of the battery 10.

[0123] The pressure relief zone 113 may employ a first weak point made of a low-melting-point material so that the discharged material can melt and break through. This allows the first weak point to be actuated to release the internal pressure of the first housing 11 when its temperature reaches a threshold. In other words, the first weak point has a lower melting point than other areas of the wall where the first weak point is located.

[0124] For example, the material used in the first weak zone has a melting point below 600°C. This allows the first weak zone to be destroyed at a lower temperature, thereby releasing the internal pressure of the first housing 11.

[0125] For example, Figure 7 This is a schematic cross-sectional view of the first housing 11 disclosed in some embodiments of this application. Optionally, in one embodiment, as... Figure 7 As shown, a first groove 115 is provided on the first housing 11, and the bottom wall of the first groove 115 forms a first weak area. Since the bottom wall of the first groove 115 is weaker than other areas of the wall where the first groove 115 is provided, the bottom wall of the first groove 115 is easily damaged by the discharged material. After the housing 25 is actuated, the discharged material can damage the bottom wall of the first groove 115 and be discharged outside the first housing 11, which is simple and low-cost.

[0126] Optionally, such as Figure 7As shown, the first groove 115 is disposed 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.

[0127] By forming a first groove 115 by providing an opening on the side surface of the first housing 11 facing the battery cell 20, a larger gap can be made between the bottom wall of the first groove 115 and the battery cell 20, making it easier for the discharge of the battery cell 20 to be discharged into the first groove 115.

[0128] It should be understood that the opening of the first groove 115 can also face away from the battery cell 20. In this case, the bottom wall of the first groove 115 is also easily damaged by emissions.

[0129] Figure 8 This diagram shows a cross-sectional view of a combined structure of a first housing 11 and a second housing 12 disclosed in an embodiment of this application. Figure 8 As shown, the second housing 12 includes an electrical cavity 12a, a collection cavity 12b, and an isolation component 123. The electrical cavity 12a can accommodate one or more first housings 11. The collection cavity 12b is used to collect emissions from the first housings 11. The isolation component 123 isolates the electrical cavity 12a and the collection cavity 12b, such that the electrical cavity 12a and the collection cavity 12b are located on opposite sides of the isolation component 123. Here, "isolation" refers to separation and does not necessarily need to be completely sealed.

[0130] By using the isolation component 123 to separate the electrical cavity 12a containing the first housing 11 from the collection cavity 12b for collecting emissions, when the housing 25 of the battery cell 20 inside the first housing 11 is actuated, the emissions from the battery cell 20 enter the collection cavity 12b, so that the emissions do not enter or enter the electrical cavity 12a in small quantities, thereby achieving separation of emissions and battery cells 20. This reduces the impact of the emissions from the battery cells 20 (which contain gases, combustibles, metal shavings, etc.) on electrical connection components and prevents the emissions from the battery cells 20 from causing short circuits between the battery cells 20, thus enhancing the safety of the battery 10.

[0131] In some embodiments, to facilitate the installation of the second housing 12, multiple first housings 11 can correspond to the same isolation component 123, that is, the isolation component 123 corresponding to multiple first housings 11 is the same isolation component 123, which is simple to implement and low in cost. For example, multiple first housings 11 arranged in a single row or a single column can correspond to the same isolation component 123. As another example, all the first housings 11 within the second housing 12 can correspond to the same isolation component 123.

[0132] Figure 9A cross-sectional schematic diagram of another combined structure of the first housing 11 and the second housing 12 disclosed in an embodiment of this application is shown.

[0133] In other embodiments, such as Figure 9 As shown, the first housing 11 can also be a cover with an opening. In this case, the opening forms a pressure relief area 113, thus allowing the internal pressure inside the first housing 11 to be released through the opening, preventing the first housing 11 from exploding and improving the safety performance of the battery 10. Optionally, as shown... Figure 9 As shown, the isolation component 123 can close (or cover) the opening of the first housing 11. By covering the opening of the first housing 11 with the isolation component 123, it is possible to prevent substances in the collection chamber 12b from entering the electrical chamber 12a.

[0134] Optionally, the isolation component 123 is configured to be breached when the internal pressure of the first housing 11 is released in the pressure relief area 113, so that the discharge from the first housing 11 passes through the isolation component 123 and enters the collection chamber 12b.

[0135] In some embodiments, the pressure relief area 113 on the first housing 11 faces the isolation member 123 so that when the pressure relief area 113 releases the internal pressure of the first housing 11, it can directly rush towards the isolation member 123, so that the discharge from the first housing 11 can more easily enter the collection chamber 12b, reducing the possibility of the discharge entering the electrical chamber 12a.

[0136] Figure 10 and Figure 11 These are schematic cross-sectional views of another combined structure of the first housing 11 and the second housing 12 disclosed in embodiments of this application. In some embodiments, such as Figure 10 and Figure 11 As shown, a second weak zone 1231 can be provided on the isolation component 123. The second weak zone 1231 and the pressure relief region 113 are arranged opposite each other. The second weak zone 1231 can be broken when the internal pressure of the pressure relief region 113 is released, so that the discharge from the first housing 11 passes through the isolation component 123 and enters the collection chamber 12b. Figure 10 and Figure 11 The difference is that, Figure 11 The first box 11 in the middle has an opening.

[0137] By providing a second weak zone 1231 corresponding to the pressure relief zone 113 in the isolation component 123, on the one hand, when the housing 25 of the battery cell 20 is actuated, the emissions from the first housing 11 can pass through the second weak zone 1231 and enter the collection chamber 12b, reducing the possibility of emissions entering the electrical cavity 12a; on the other hand, it can also ensure the isolation between the electrical cavity 12a and the collection chamber 12b when the housing 25 of the battery cell 20 is not actuated, preventing substances in the collection chamber 12b from entering the electrical cavity 12a.

[0138] In some embodiments, a first housing 11 may correspond to a second weak area 1231. For example, as... Figure 2 As shown, the second cover plate 122 can be an isolation component 123, and one first housing 11 corresponds to a second weak area 1231 provided on the second cover plate 122. In other embodiments, multiple first housings 11 in a single row or column can correspond to one second weak area 1231. By setting the second weak area 1231 of multiple first housings 11 in a single row or column to the same location, the emissions from the battery cells 20 inside the first housing 11 can be concentrated and discharged along one second weak area 1231, thereby reducing the impact on the electrical connection components in the first housing 11 and thus enhancing the safety of the battery 10. At the same time, the implementation method is simple and low in cost.

[0139] The second weak zone 1231 can be configured in various ways to facilitate the destruction of emissions. This application does not limit this in the embodiments, but will illustrate with examples below.

[0140] Optionally, the thickness of the second weak zone 1231 is less than the thickness of other areas of the wall where the second weak zone 1231 is located. For example, the thickness of the second weak zone 1231 is 0.4mm-3mm. This ensures that the second weak zone 1231 is not too thin, which would shorten its service life, nor too thick, which would require actuation under high air pressure, thus balancing the service life and safety performance of the battery 10.

[0141] In addition to using a thinner second weak region 1231, a second weak region 1231 made of a low-melting-point material can also be used so that the emitted material can melt through it. That is, the second weak region 1231 has a lower melting point than other areas of the wall in which the second weak region 1231 is located, so that the second weak region 1231 is easily damaged, and when the temperature of the second weak region 1231 reaches a threshold, it can be actuated to release the internal pressure of the discharge chamber 12a.

[0142] For example, the material used in the second weak region 1231 has a melting point below 600°C. This allows the second weak region 1231 to be destroyed at a lower temperature, thereby releasing the internal pressure of the gas chamber 12a.

[0143] Figure 12 and Figure 13 The diagrams show cross-sectional views of another combined structure of the first housing 11 and the second housing 12 disclosed in this application. Optionally, in one embodiment, as... Figure 12 and Figure 13 As shown, a second groove 1232 is provided on the isolation component 123, and the bottom wall 12321 of the second groove 1232 forms a second weak area 1231. Since the bottom wall 12321 of the second groove 1232 is weaker than other areas of the wall where the second groove 1232 is located, it is easily damaged by the discharged material. When the housing 25 is actuated, the discharged material can damage the bottom wall 12321 of the second groove 1232 and enter the collection chamber 12b. This implementation method is simple and low-cost. Figure 12 and Figure 13 The difference is that, Figure 13 The first box 11 in the middle has an opening.

[0144] Optionally, the second groove 1232 is disposed on the 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 allows for a larger gap between the bottom wall of the second groove 1232 and the first housing 11, facilitating the discharge of waste from the first housing 11 into the second groove 1232.

[0145] It should be understood that the opening of the second groove 1232 can also face away from the first housing 11. In this case, the bottom wall of the second groove 1232 is also easily damaged by the discharge.

[0146] In other embodiments, a through hole can be used instead of the second weak area 1231, that is, the through hole is arranged opposite to the pressure relief area 113, so that the discharge of the first housing 11 can enter the collection chamber 12b through the through hole, reducing the possibility of the discharge entering the electrical chamber 12a.

[0147] Optionally, the isolation component 123 contains fluid to regulate the temperature of the battery cell 20.

[0148] Specifically, when the internal pressure is released in the pressure relief area 113, the isolation component 123 can be destroyed, allowing the fluid in the isolation component 123 to drain out. This absorbs heat from the battery cell 20, lowers the temperature of the discharge, and thus reduces the hazard of the discharge. In this case, the fluid and the fluid-cooled discharge enter the collection chamber 12b together. Due to the cooling effect of the fluid, the temperature of the discharge from the battery cell 20 is rapidly reduced, thus greatly reducing the hazard of the discharge entering the collection chamber 12b and preventing it from significantly affecting other parts of the battery 10, such as other battery cells 20. This effectively suppresses the destructive potential of abnormal battery cells 20 within the first housing 11 and reduces the possibility of battery 10 explosion.

[0149] In some embodiments, the insulating member 123 may be formed by a thermally conductive material to create a fluid flow channel. The fluid flows within the channel and conducts heat through the thermally conductive material, thereby cooling the battery cell 20. Optionally, the second weak region 1231 on the insulating member 123 may consist only of thermally conductive material without fluid, forming a thinner layer of thermally conductive material that is more easily damaged by emissions. For example, the bottom wall 12321 of the second groove 1232 may be a thin layer of thermally conductive material to form the second weak region 1231.

[0150] Figure 14 This is a schematic diagram of the structure of the isolation component 123 disclosed in one embodiment of this application. Optionally, in some embodiments, such as Figure 14 As shown, the isolation component 123 may include a first heat-conducting plate 1233 and a second heat-conducting plate 1234. The first heat-conducting plate 1233 and the second heat-conducting plate 1234 form a first flow channel 1235 for containing fluid. The first heat-conducting plate 1233 is attached to the first housing 11. Figure 15 yes Figure 14 An enlarged structural diagram of part A of the isolation component 123 shown. (See diagram below.) Figure 15 As shown, a first region 123a of the first heat-conducting plate 1233 is recessed into the second heat-conducting plate 1234 to form a second groove 1232, and the first region 123a is connected to the second heat-conducting plate 1234. Thus, a first flow channel 1235 is formed around the second groove 1232, while there is no first flow channel 1235 within the bottom wall of the second groove 1232, thereby forming a second weak region 1231. Since the isolation component 123 includes the first heat-conducting plate 1233 and the second heat-conducting plate 1234, and the first flow channel 1235 is formed between the first heat-conducting plate 1233 and the second heat-conducting plate 1234, the manufacturing process of the isolation component 123 is convenient and simple.

[0151] Alternatively, the first heat-conducting plate 1233 or the second heat-conducting plate 1234 at the bottom wall of the second groove 1232 can be removed to form a thinner, weaker area. For example, as Figure 14 As shown, the first region 123a is provided with a through hole 1236. The radial dimension of the through hole 1236 is smaller than the radial dimension of the second groove 1232. That is, the first heat-conducting plate 1233 at the bottom wall of the second groove 1232 is removed, while the connection between the first heat-conducting plate 1233 and the second heat-conducting plate 1234 at the bottom edge of the second groove 1232 is maintained, so as to form a first flow channel 1235 around the second groove 1232.

[0152] Optionally, the second heat-conducting plate 1234 corresponding to the through hole 1236 can be thinned, that is, the thickness of the second heat-conducting plate 1234 corresponding to the through hole 1236 is less than the thickness of the second heat-conducting plate 1234 in other areas, thereby making the weak area more susceptible to damage by emissions. Optionally, a weak groove can also be provided on the second heat-conducting plate 1234 corresponding to the through hole 1236.

[0153] Optionally, in some embodiments, the battery 10 further includes a protective member for protecting the isolation member 123, which may be formed by the isolation member 123 and the protective member for the collection chamber 12b. In some embodiments, the protective member may form part of the wall of the second housing 12.

[0154] The collection cavity 12b formed by the protective member and the isolation member 123 does not occupy the space that can accommodate the battery cell 20. Therefore, a larger collection cavity 12b can be provided, which can effectively collect and buffer the emissions and reduce their danger. At the same time, the protective member can protect the isolation member 123 and prevent the isolation member 123 from being damaged by foreign objects.

[0155] Optionally, in some embodiments, a fluid, such as a cooling medium, may be provided in the collection chamber 12b, or a component may be provided to contain the fluid in order to further cool the discharge entering the collection chamber 12b.

[0156] Optionally, in some embodiments, the collection cavity 12b can be a sealed chamber. For example, the connection between the protective member and the isolation member 123 can be sealed by a sealing member. By setting the collection cavity 12b formed by the isolation member 123 and the protective member as a closed chamber by the sealing member, substances in the collection cavity 12b can be prevented from entering the electrical cavity 12a.

[0157] Optionally, the battery 10 may also include other structures, which will not be described in detail here. For example, such as Figure 3 and Figure 4 As shown, the battery 10 may further include a wiring harness separator 50 housed in the first housing 11, the wiring harness separator 50 being used to mount a busbar component. The busbar component is used to achieve electrical connections between multiple battery cells 20, such as in parallel, series, or mixed connections. For example, as... Figure 3 and Figure 4 As shown, the battery 10 may further include a side plate 60 housed in the first housing 11, which may be disposed around the battery cell 20. A second flow channel 61 may be provided in the side plate 60, which may contain fluid to regulate the temperature of the battery cell 20.

[0158] One embodiment of this application also provides an electrical device that may include the battery 10 in the foregoing embodiments. Optionally, the electrical device may be a vehicle 1, a ship, or a spacecraft.

[0159] The battery 10 and the power-consuming device of the present application embodiments have been described above. The method and apparatus for preparing the battery of the present application embodiments will be described below. For parts not described in detail, please refer to the foregoing embodiments.

[0160] Figure 16 A schematic flowchart of a method 200 for preparing a battery according to an embodiment of this application is shown. Figure 16 As shown, the method 200 may include:

[0161] S210 provides a plurality of battery cells, each battery cell having a housing, the housing being configured to be actuated to release the internal pressure of the housing when the internal pressure or temperature of the housing reaches a threshold.

[0162] S220, providing a plurality of first housings, the first housings being used to house at least one of the plurality of battery cells, the first housings including a pressure relief area for releasing the internal pressure of the first housings;

[0163] S230, a second enclosure is provided for accommodating the plurality of first enclosures.

[0164] Figure 17 A schematic block diagram of a battery fabrication apparatus 300 according to one embodiment of this application is shown. Figure 17 As shown, the apparatus 300 for preparing batteries may include a providing module 310.

[0165] Module 310 is provided for: providing a plurality of battery cells, each battery cell having a housing, the housing being configured to be actuated to release the internal pressure of the housing when the internal pressure or temperature of the housing reaches a threshold; providing a plurality of first housings for housing at least one of the plurality of battery cells, each first housing including a pressure relief region for releasing the internal pressure of the first housing; and providing a second housing for housing the plurality of first housings.

[0166] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: Multiple battery cells (20); A plurality of first housings (11), the first housings (11) being used to house at least one of the plurality of battery cells (20); A second housing (12) is used to accommodate the plurality of first housings (11). The second housing (12) includes an electrical cavity (12a), a collection cavity (12b), and an isolation component (123). The electrical cavity (12a) is used to accommodate the plurality of first housings (11). The collection cavity (12b) is used to collect emissions from the battery cells (20) inside the first housings (11). The isolation component (123) is used to isolate the electrical cavity (12a) and the collection cavity (12b) such that the electrical cavity (12a) and the collection cavity (12b) are disposed on both sides of the isolation component (123). The isolation component (123) is configured to allow the emissions to pass through the isolation component (123) and enter the collection cavity (12b).

2. The battery according to claim 1, wherein, The first housing (11) includes a pressure relief area (113) for releasing the internal pressure of the first housing (11).

3. The battery according to claim 2, wherein, The pressure relief area (113) faces the isolation component (123).

4. The battery according to claim 3, wherein, The first housing (11) is a cover with an opening, which forms the pressure relief area (113).

5. The battery according to claim 4, wherein, The isolation component (123) covers the opening.

6. The battery according to claim 3, wherein, The first housing (11) has a cavity for accommodating the battery cell (20), and the pressure relief area (113) is a first weak area of ​​the first housing (11), which is configured to be actuated when the internal pressure or temperature of the cavity reaches a threshold to release the internal pressure of the cavity.

7. The battery according to claim 6, wherein, The thickness of the first weak zone is less than the thickness of other areas of the wall where the first weak zone is located.

8. The battery according to claim 7, wherein, The thickness of the first weak zone is 0.4mm-3mm.

9. The battery according to any one of claims 6 to 8, wherein, The first weak zone has a lower melting point than other areas of the wall where the first weak zone is located.

10. The battery according to claim 9, wherein, The melting point of the material in the first weak zone is below 600°C.

11. The battery according to any one of claims 6 to 8, wherein, The first box (11) is provided with a first groove (115), and the bottom wall of the first groove (115) is the first weak area.

12. The battery according to claim 11, wherein, The opening of the first groove (115) faces the battery cell (20).

13. The battery according to any one of claims 2 to 8, wherein, The isolation component (123) is configured to contain fluid to regulate the temperature of the battery cell (20).

14. The battery according to claim 13, wherein, The isolation component (123) is configured to be destroyed when the internal pressure is released in the pressure relief region (113) so that the fluid is discharged from the interior of the isolation component (123).

15. The battery according to claim 13, wherein, The isolation component (123) includes: The first heat-conducting plate (1233) is attached to the first housing (11). The second heat-conducting plate (1234) is arranged on the side of the first heat-conducting plate (1233) away from the first housing (11); and A first flow channel (1235) is formed between the first heat-conducting plate (1233) and the second heat-conducting plate (1234) for the fluid to flow therethrough.

16. The battery according to any one of claims 2 to 8, wherein, The isolation component (123) is provided with a through hole (1236), which is disposed opposite to the pressure relief area (113). The through hole (1236) is used to allow the discharge to pass through so that the discharge enters the collection chamber (12b).

17. The battery according to any one of claims 2 to 8, wherein, The isolation component (123) is configured to be destroyed when the internal pressure is released in the pressure relief area (113) so that the discharge passes through the isolation component (123) into the collection chamber (12b).

18. The battery according to claim 17, wherein, The isolation component (123) is provided with a second weak zone (1231), which is disposed opposite to the pressure relief area (113). The second weak zone (1231) is configured to be disrupted by the emission so that the emission passes through the second weak zone (1231) and enters the collection chamber (12b).

19. The battery according to claim 18, wherein, The thickness of the second weak zone (1231) is less than the thickness of other areas of the wall where the second weak zone (1231) is located.

20. The battery according to claim 19, wherein, The thickness of the second weak zone (1231) is 0.4 mm-3 mm.

21. The battery according to claim 18, wherein, The second weak region (1231) has a lower melting point than other regions of the wall in which the second weak region (1231) is located.

22. The battery according to claim 21, wherein, The melting point of the material in the second weak zone (1231) is below 600°C.

23. The battery according to claim 18, wherein, The isolation component (123) is provided with a second groove (1232), and the bottom wall (12321) of the second groove is the second weak area (1231).

24. The battery according to claim 23, wherein, The opening of the second groove (1232) faces the first box (11).

25. The battery according to any one of claims 1 to 8, wherein, Multiple first housings (11) correspond to the same isolation component (123).

26. The battery according to any one of claims 2 to 8, wherein, The pressure relief area (113) is disposed 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 all electrode terminals (261) of the battery cell (20) are disposed on the second surface (22), which is disposed opposite to the first surface (21).

27. The battery according to any one of claims 2 to 8, wherein, All of the battery cells (20) housed within a first housing (11) correspond to the same pressure relief area (113).

28. The battery according to any one of claims 1 to 8, wherein, The battery also includes: A protective member configured to protect the isolation component (123), wherein the collection cavity (12b) is formed between the protective member and the isolation component (123).

29. The battery according to claim 28, wherein, The battery also includes: A sealing member is disposed between the isolation member (123) and the protective member to seal the collection chamber (12b).

30. An electrical device, characterized in that, include: The battery according to any one of claims 1 to 29.

31. A method for preparing a battery, characterized in that, include: Multiple battery cells (20) are provided; A plurality of first housings (11) are provided, the first housings (11) being used to accommodate at least one of the plurality of battery cells (20). A second housing (12) is provided for accommodating the plurality of first housings (11), wherein the second housing (12) includes an electrical cavity (12a), a collection cavity (12b), and an isolation component (123). The electrical cavity (12a) is used to accommodate the plurality of first housings (11), the collection cavity (12b) is used to collect emissions from the battery cells (20) within the first housings (11), and the isolation component (123) is used to isolate the electrical cavity (12a) and the collection cavity (12b) such that the electrical cavity (12a) and the collection cavity (12b) are disposed on opposite sides of the isolation component (123), and the isolation component (123) is configured to allow the emissions to pass through the isolation component (123) and enter the collection cavity (12b).

32. An apparatus for manufacturing a battery, characterized in that, include: Provide module (310) for: Multiple battery cells (20) are provided; A plurality of first housings (11) are provided, the first housings (11) being used to accommodate at least one of the plurality of battery cells (20). A second housing (12) is provided for accommodating the plurality of first housings (11), wherein the second housing (12) includes an electrical cavity (12a), a collection cavity (12b), and an isolation component (123). The electrical cavity (12a) is used to accommodate the plurality of first housings (11), the collection cavity (12b) is used to collect emissions from the battery cells (20) within the first housings (11), and the isolation component (123) is used to isolate the electrical cavity (12a) and the collection cavity (12b) such that the electrical cavity (12a) and the collection cavity (12b) are disposed on opposite sides of the isolation component (123), and the isolation component (123) is configured to allow the emissions to pass through the isolation component (123) and enter the collection cavity (12b).

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