Battery, device, method for preparing battery, and device for preparing battery

Abstract

A battery (11), a device including the battery (11), a method for preparing the battery (11), and a preparation device, relate to the field of energy storage technology, and are used to solve the problem of poor safety in the use of the battery (11). The battery (11) comprises at least two battery cells (111), and the at least two battery cells (111) each comprise a pressure relief mechanism (1111), and the pressure relief mechanism (1111) is used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell (111) reaches a threshold value; at least two discharge channels (112), each discharge channel (112) is isolated from each other and arranged opposite to the pressure relief mechanism (1111), and the at least two discharge channels (112) are configured to respectively collect discharges from the corresponding battery cells (111) when the pressure relief mechanism (1111) is actuated. The method for preparing the battery (11) comprises the following steps: configuring at least two battery cells (111); configuring at least two discharge channels (112). The preparation device for the battery (11) comprises: a battery cell configuration module and a discharge channel configuration module. The battery (11) provided above, the device including the battery (11), the method for preparing the battery (11), and the device for preparing the battery (11) are used to improve the safety of the battery (11).

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery, a device, a method for preparing a battery, and a preparation device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development. In the development of battery technology, in addition to improving battery performance, safety issues are also an issue that cannot be ignored. If the safety of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to enhance the safety of the battery is a technical problem that needs to be solved in battery technology. Summary of the invention

[0003] In view of the above problems, the embodiments of the present application provide a battery, a device, a method for preparing a battery, and a device for preparing a battery to improve the safety of battery use.

[0004] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0005] A first aspect of an embodiment of the present application provides a battery, comprising:

[0006] at least two battery cells, each of which comprises a pressure relief mechanism, the pressure relief mechanism being actuated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value;

[0007] At least two exhaust channels are isolated from each other and arranged opposite to the pressure relief mechanism, and the at least two exhaust channels are configured to respectively collect exhaust from corresponding battery cells when the pressure relief mechanism is actuated.

[0008] Compared with the prior art, the battery provided in the embodiment of the present application has the following advantages:

[0009] The battery provided in the embodiment of the present application is provided with a pressure relief mechanism on at least two battery cells to release the internal pressure when the internal pressure or temperature of the battery cells reaches a threshold value, and the pressure relief mechanisms on at least two battery cells are respectively arranged relative to each emission channel isolated from each other, so that when the internal pressure or temperature of each battery cell reaches a threshold value, the emissions inside at least two battery cells can be discharged through different emission channels, the emissions inside the battery cells can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cells clogging the emission channels is effectively reduced, thereby improving the safety of battery use.

[0010] In some embodiments, at least two battery cells include a first battery cell and a second battery cell disposed adjacent to each other, and the pressure relief mechanism of the first battery cell and the pressure relief mechanism of the second battery cell are disposed relative to different emission channels, respectively. In this way, the adjacent first battery cell and the second battery cell can release emissions through different emission channels, respectively, thereby enabling the first battery cell and the second battery cell to release emissions to the outside of the shell in a timely and effective manner, thereby improving the safety of battery use.

[0011] In some embodiments, the energy density of the first battery cell is greater than the energy density of the second battery cell. In this way, the capacity of the battery can be improved while ensuring the safety of battery use. In addition, the thermal failure reaction of the first battery cell is more intense. The first battery cell and the second battery cell are adjacent to each other, which is conducive to reducing the chain reaction of thermal failure, that is, it is conducive to slowing down the spread of heat diffusion, thereby further improving the safety of battery use.

[0012] In some embodiments, the first battery cells and the second battery cells are alternately arranged in an arrangement of n first battery cells and m second battery cells, where n≥1 and m≥1. In this way, the first battery cells and the second battery cells with different energy densities are arranged at intervals, which is helpful to mitigate the spread of heat diffusion and thus improve the safety of battery use.

[0013] In some embodiments, the number of first battery cells is at least two, and the pressure relief mechanisms of two adjacent first battery cells are respectively arranged relative to different emission channels. In this way, different first battery cells can release emissions through different emission channels, respectively, so that the emissions of the first battery cells can be discharged to the outside of the battery in a timely and effective manner. Moreover, the probability of thermal failure of the first battery cell leading to thermal failure of the second battery cell can be effectively reduced, which is conducive to alleviating the chain reaction of thermal failure and improving the safety of battery use.

[0014] In some embodiments, the number of second battery cells is at least two, and the pressure relief mechanisms of two adjacent second battery cells are respectively arranged relative to different emission channels. In this way, different second battery cells can release emissions through different emission channels, respectively, so that the emissions of the second battery cells can be discharged to the outside of the battery in a timely and effective manner. Moreover, the probability of thermal failure of the second battery cell leading to thermal failure of the first battery cell can be effectively reduced, which is conducive to alleviating the chain reaction of thermal failure and improving the safety of battery use.

[0015] In some embodiments, a first thermal insulation member is disposed between two adjacent first battery cells. Thus, when one of the first battery cells thermally fails, the first thermal insulation member can effectively prevent the first battery cell adjacent to the thermally failed first battery cell from thermally failing, thereby improving the safety of battery use.

[0016] In some embodiments, a second thermal insulation member is disposed between adjacent second battery cells. Thus, when one of the second battery cells fails due to thermal failure, the second thermal insulation member can effectively prevent the second battery cell adjacent to the second battery cell that fails due to thermal failure from failing due to thermal failure, thereby improving the safety of the battery.

[0017] In some embodiments, a third thermal insulation member is disposed between adjacent first battery cells and second battery cells. Thus, when one of the first battery cells thermally fails, the third thermal insulation member can effectively prevent the second battery cell adjacent to the first battery cell that thermally failed from thermally failing, and vice versa.

[0018] In some embodiments, the area of ​​the pressure relief mechanism of the first battery cell is larger than the area of ​​the pressure relief mechanism of the second battery cell. In this way, even if the thermal failure reaction of the first battery cell is more severe, the first battery cell can be discharged to the outside of the battery in time through the pressure relief mechanism of the first battery cell with a larger area. At this time, the second battery cell can also be discharged to the outside of the battery in time through the pressure relief mechanism of the second battery cell, thereby improving the safety of battery use.

[0019] In some embodiments, the battery further comprises a box body, the box body has a plurality of walls, the plurality of walls are used to enclose a receiving cavity for receiving the battery cell, at least one of the plurality of walls has a hollow inner cavity, and the hollow inner cavity is used to form a discharge channel. The box body is used to protect the battery cell placed in the receiving cavity, and a hollow inner cavity forming a discharge channel is provided in at least one of the plurality of walls of the box body, so that the pressure relief mechanism of the battery cell is arranged relative to the hollow inner cavity, so that when the internal pressure or temperature of the battery cell reaches a threshold value, the discharge of the battery cell can be discharged into the hollow inner cavity, so that the discharge of the battery cell when the battery cell fails thermally can be discharged to the outside of the battery in a timely and effective manner, thereby improving the safety of the battery.

[0020] In some embodiments, the multiple walls include a bottom wall, which is used to support the battery cell. The bottom wall has a hollow inner cavity. In this way, the emissions in the battery cell are released downward and enter the hollow inner cavity at the bottom through the pressure relief mechanism. This arrangement of the battery allows the battery to release emissions to the bottom of the vehicle after being placed in the battery compartment of the vehicle, rather than to the passenger compartment above the battery compartment, thereby further increasing the safety of battery use.

[0021] In some embodiments, at least one wall is configured to be destroyed when the pressure relief mechanism is actuated so that emissions from the battery cell pass through the at least one wall into the emission channel. In this way, when the internal pressure or temperature of the battery cell reaches a threshold value, the pressure relief mechanism of the battery cell is actuated and the emissions inside the battery cell are released, the emissions released by the battery cell can act on at least one wall of the box body, so that the part of the box body opposite to the pressure relief mechanism of the battery cell is destroyed, and the hollow inner cavity of the box body is connected to the pressure relief mechanism, so that the emissions inside the battery cell can be discharged into the emission channel in a timely and effective manner, thereby further increasing the safety of battery use.

[0022] In some embodiments, at least one wall is provided with a first through hole, and the first through hole is configured to be connected to the emission channel so that when the pressure relief mechanism is actuated, emissions from the battery cell enter the emission channel via the first through hole. In this way, when the internal pressure or temperature of the battery cell reaches a threshold value, the pressure relief mechanism of the battery cell is actuated, and the emissions inside the battery cell are released, the emissions released by the battery cell enter the hollow inner cavity of the box body through the first through hole, so that the emissions inside the battery cell can be discharged into the emission channel in a timely and effective manner, thereby further increasing the safety of battery use.

[0023] In some embodiments, the battery further includes a thermal management component for containing a fluid to regulate the temperature of the battery cell. The thermal management component is disposed between the battery cell and at least one wall. The thermal management component is configured to be destroyed when the pressure relief mechanism is actuated to allow the fluid to flow out. In this way, emissions from the battery cell can enter the emission channel through the destroyed thermal management component. Since the thermal management component is destroyed, the fluid that flows out can quickly reduce the temperature inside the battery through the fluid, which helps to alleviate the chain reaction of thermal failure and improve the safety of battery use.

[0024] In some embodiments, the thermal management component is provided with a second through hole, which is configured to be connected to the exhaust channel so that when the pressure relief mechanism is actuated, the emissions from the battery cell enter the exhaust channel through the second through hole. In this way, the emissions released by the battery cell can enter the exhaust channel quickly and smoothly through the second through hole, thereby improving the safety of battery use.

[0025] In some embodiments, the second through hole is connected to the exhaust channel via the first through hole, so that the exhaust released by the battery cell can quickly and smoothly enter the first through hole through the second through hole and then enter the exhaust channel, thereby improving the safety of the battery.

[0026] A second aspect of an embodiment of the present application provides a device, which includes the above-mentioned battery, and the battery is used to provide electrical energy.

[0027] The device of the present application utilizes the above-mentioned battery to provide electrical energy, so when the internal pressure or temperature of each battery cell reaches a threshold value, the emissions inside at least two battery cells can be discharged through different emission channels. The emissions inside the battery cells can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cells clogging the emission channels is effectively reduced, thereby improving the safety of battery use.

[0028] A third aspect of the embodiments of the present application provides a method for preparing a battery, which comprises the following steps:

[0029] Arrange at least two battery cells, each of which includes a pressure relief mechanism, the pressure relief mechanism being used to be actuated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value;

[0030] At least two exhaust channels are configured, each exhaust channel is isolated from each other and arranged opposite to the pressure relief mechanism, and the at least two exhaust channels are configured to respectively collect exhaust from corresponding battery cells when the pressure relief mechanism is actuated.

[0031] The battery preparation method provided in the present application configures at least two battery cells and at least two emission channels, and the at least two emission channels are configured to respectively collect emissions from the corresponding battery cells when the pressure relief mechanism of the battery cells is actuated, so that when the internal pressure or temperature of each battery cell reaches a threshold, the emissions inside at least two battery cells can be discharged through different emission channels. The emissions inside the battery cells can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cells clogging the emission channels is effectively reduced, thereby improving the safety of battery use.

[0032] A fourth aspect of an embodiment of the present application provides a battery manufacturing device, comprising:

[0033] A battery cell configuration module, used to configure at least two battery cells, wherein the at least two battery cells each include a pressure relief mechanism, and the pressure relief mechanism is used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value;

[0034] The exhaust channel configuration module is used to configure at least two exhaust channels, each exhaust channel is isolated from each other and arranged opposite to the pressure relief mechanism, and the at least two exhaust channels are configured to collect exhaust from corresponding battery cells respectively when the pressure relief mechanism is actuated.

[0035] The battery preparation device provided in the present embodiment configures at least two battery cells through a battery cell configuration module, and configures at least two emission channels through an emission channel configuration module, and the at least two emission channels are configured to respectively collect emissions from the corresponding battery cells when the pressure relief mechanism of the battery cell is actuated, so that when the internal pressure or temperature of each battery cell reaches a threshold value, the emissions inside at least two battery cells can be discharged through different emission channels, the emissions inside the battery cells can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cells clogging the emission channels is effectively reduced, thereby improving the safety of battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the structure of the vehicle of the present application;

[0037] Figure 2 is a schematic structural diagram of a battery module according to an embodiment of the present application;

[0038] Figure 3 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

[0039] Figure 4 The structure of the battery in the embodiment of the present application is shown in FIG. Figure 1 ;

[0040] Figure 5 The explosion of the battery in the embodiment of the present application Figure 1 ;

[0041] Figure 6 is a schematic structural diagram of a battery cell according to an embodiment of the present application;

[0042] Figure 7 is a front view of a battery cell of an embodiment of the present application;

[0043] Figure 8 is a right side view of a battery cell of an embodiment of the present application;

[0044] Fig. 9 is a top view of a battery cell according to an embodiment of the present application;

[0045] Fig.10 The explosion of the battery in the embodiment of the present application Figure 2 ;

[0046] Fig.11 is a schematic structural diagram of a first battery cell in an embodiment of the present application;

[0047] Fig.12 is a schematic structural diagram of a second battery cell in an embodiment of the present application;

[0048] Fig.13This is a schematic diagram of the structure of the bottom wall of the embodiment of the present application. Figure 1 ;

[0049] Fig.14 This is a schematic diagram of the structure of the bottom wall of the embodiment of the present application. Figure 2 ;

[0050] Fig.15 It is a schematic diagram of the structure of the thermal management component of an embodiment of the present application.

[0051] Reference numerals:

[0052] 1- Vehicle;

[0053] 11-Battery;

[0054] 111-battery monomer;

[0055] 1111-pressure relief mechanism;

[0056] 1112-positive electrode terminal;

[0057] 1113 - negative electrode terminal;

[0058] 1114-housing;

[0059] 1115 - first battery cell;

[0060] 1116 - second battery cell;

[0061] 112- discharge channel;

[0062] 113- box body;

[0063] 1131-Bottom wall;

[0064] 1132-side wall;

[0065] 1133-first through hole;

[0066] 114- first thermal insulation member;

[0067] 115 - second thermal insulation member;

[0068] 116 - third thermal insulation member;

[0069] 117- thermal management components;

[0070] 1171- second through hole;

[0071] 12- Controller;

[0072] 13- Motor. DETAILED DESCRIPTION

[0073] Battery is a device that converts chemical energy into electrical energy and is widely used in new energy vehicles, energy storage power stations and other fields.

[0074] An existing type of battery includes a box body and a plurality of battery cells arranged in the box body, wherein the plurality of battery cells are connected in series and / or in parallel. A discharge channel is arranged on the box body, and a pressure relief mechanism is arranged on the plurality of battery cells, and the pressure relief mechanisms on the plurality of battery cells are connected to the discharge channel. When a battery cell fails thermally, the battery cell can release the high-temperature and high-pressure gas inside the battery cell to the discharge channel through the pressure relief mechanism, and then release it to the outside of the battery through the discharge channel to improve the safety of use.

[0075] However, the inventor of the present application has found that when there are a large number of battery cells inside the battery, thermal failure of the battery cells usually triggers a chain reaction, which is specifically manifested as a single battery cell thermal failure, causing a sharp increase in local temperature, which in turn triggers thermal failure of multiple battery cells. Multiple battery cells simultaneously release high-temperature and high-pressure gas into the same exhaust channel, and the temperature in the exhaust channel further increases, further aggravating the thermal failure. This chain reaction of thermal failure will increase the risk of combustion and explosion, resulting in reduced safety of battery use. In addition, when a battery cell thermally fails, it will not only release high-temperature and high-pressure gas through the pressure relief mechanism, but also release some solid substances such as pole pieces. These solid substances will enter the exhaust channel with the airflow and block the exhaust channel, causing the heat in the exhaust channel to further accumulate, further aggravating the chain reaction and reducing the safety of battery use.

[0076] In order to solve the problem that multiple battery cells simultaneously release high-temperature and high-pressure gases into the same emission channel, and the solid matter released by the battery cells easily blocks the emission channel, resulting in a high risk of battery combustion and explosion and low battery safety, the present application provides a battery, a device, a battery preparation device and a battery preparation method. By equipping the battery with at least two emission channels, when the internal pressure or temperature of at least two battery cells reaches a threshold, the emissions of at least two battery cells can be discharged through at least two emission channels isolated from each other, so that the emissions inside the battery cells can be discharged out of the interior of the battery cells in a timely and effective manner, thereby reducing the incidence of battery cell combustion and explosion and improving the safety of battery use.

[0077] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application, so that the above-mentioned purposes, features and advantages of the embodiments of the present application can be more obvious and easy to understand. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of this application.

[0078] An embodiment of the present application provides a device and a battery. The device provided by the present application includes a battery, and the battery is used to provide electrical energy. The device provided by the present application is, for example, a mobile phone, a portable device, a laptop computer, an electric car, an electric car, a ship, a spacecraft, an electric toy, and an electric tool, etc., wherein the spacecraft is, for example, an airplane, a rocket, a space shuttle, and a spacecraft, etc., and the electric toys include, for example, fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and the electric tools include, for example, metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0079] The battery described in the present application is not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are all described using electric vehicles as examples.

[0080] Figure 1 It is a simple schematic diagram of a vehicle 1 of the present embodiment. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 11 can be arranged inside the vehicle 1. For example, the battery 11 can be arranged at the bottom, the front or the rear of the vehicle 11. The battery 11 can be used to power the vehicle 1. For example, the battery 11 can be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 12 and a motor 13. The controller 12 is used, for example, to control the battery 11 to power the motor 13. The battery 11 can be used for starting and navigating the vehicle 1. Of course, the battery 11 can also be used to drive the vehicle 1 to travel, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0081] The battery 11 mentioned in this embodiment can be as follows Figure 2 The battery module shown or Figure 3As shown in the battery pack, the basic structural unit of the battery module and the battery pack is a battery cell 111, and a plurality of battery cells 111 can be connected in series and / or in parallel via electrode terminals to be applied to various electrical devices. Among them, the battery module is to protect the battery cell 111 from external impact, heat, vibration, etc., and the battery module is formed by electrically connecting a certain number of battery cells 111 together and placing them in a frame. The battery pack is the final state of the battery system installed in the electric vehicle. Most of the current battery packs are made by assembling various control and protection systems such as battery management systems and thermal management components on one or more battery modules. With the development of technology, the battery module level can be omitted, that is, the battery pack is directly formed by the battery cell 111. This improvement has improved the weight energy density and volume energy density of the battery system while significantly reducing the number of components.

[0082] like Figure 4 and Figure 5 As shown, the battery 11 of the present application includes: at least two battery cells 111 and at least two discharge channels 112, and at least two battery cells 111 each include a pressure relief mechanism 1111 (see Fig.11 and Fig.12 ), the pressure relief mechanism 1111 is used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell 111 reaches a threshold value, the exhaust channels 112 are isolated from each other and arranged opposite to the pressure relief mechanism 1111, and at least two exhaust channels 112 are configured to respectively collect exhaust from the corresponding battery cells 111 when the pressure relief mechanism 1111 is actuated.

[0083] The pressure relief mechanism 1111 refers to an element or component that can be actuated to release the internal pressure and / or internal substances when the internal pressure or internal temperature of the battery cell 111 reaches a predetermined threshold. The pressure relief mechanism 1111 can be specifically in the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell 111 reaches a predetermined threshold, the pressure relief mechanism 1111 performs an action or the weak structure provided in the pressure relief mechanism 1111 is destroyed, thereby forming an opening or channel for internal pressure release. The threshold referred to in this application can be a pressure threshold or a temperature threshold, and the design of the threshold varies according to different design requirements. For example, the threshold can be designed or determined according to the internal pressure or internal temperature value of the battery cell 111 that is considered to be dangerous or out of control. In addition, the threshold may, for example, depend on one or more of the materials used in the positive electrode plate, the negative electrode plate, the electrolyte and the separator in the battery cell 111.

[0084] The "actuation" mentioned in this application means that the pressure relief mechanism 1111 is in action or activated to a certain state, so that the internal pressure of the battery cell 111 can be released. The action produced by the pressure relief mechanism 1111 may include but is not limited to: at least a part of the pressure relief mechanism 1111 is broken, shattered, torn or opened, etc. When the pressure relief mechanism 1111 is actuated, the high-temperature and high-pressure substances inside the battery cell 111 will be discharged from the actuated part as emissions. In this way, the battery cell 111 can be depressurized under controllable pressure or temperature, thereby avoiding potential more serious accidents. The emissions from the battery cell 111 mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative pole pieces, fragments of the isolation membrane, high-temperature and high-pressure gas produced by the reaction, flames, and the like. High-temperature and high-pressure emissions are discharged toward the direction of the pressure relief mechanism 1111 of the battery cell 111, and can be more specifically discharged in the direction toward the area where the pressure relief mechanism 1111 is actuated. The power and destructive force of such emissions may be great and may even be sufficient to break through one or more components in that direction.

[0085] The battery cell 111 in the present application may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and the embodiments of the present application do not limit this. The battery cell 111 may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. The battery cell 111 is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0086] like Figures 6 to 9As shown, the battery cell 111 generally includes an electrode assembly (not shown) and an electrolyte (not shown). The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive electrode sheet and the negative electrode sheet. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. The current collector not coated with the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer. The current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the diaphragm may be polypropylene (referred to as PP) or polyethylene (referred to as PE), etc. In addition, the electrode assembly may be a winding structure or a laminated structure, and the number of electrode assemblies may be one or more, and the embodiment of the present application does not impose specific restrictions on this. The battery cell 111 also includes a shell 1114, and the electrode assembly and the electrolyte are both encapsulated in the shell 1114. The shell 1114 may be a hollow cuboid, a cube or a cylinder. The material of the shell 1114 may be aluminum or steel and its alloys, or a plastic material or an aluminum-plastic film. A positive electrode terminal 1112 and a negative electrode terminal 1113 are also provided on the shell 1114. The positive electrode tab is electrically connected to the positive electrode terminal 1112, and the negative electrode tab is electrically connected to the negative electrode terminal 1113 to output electrical energy. The shell 1114 is also provided with the above-mentioned pressure relief mechanism 1111. The pressure relief mechanism 1111 can be set at any position of the shell 1114. For example, the pressure relief mechanism 1111 can be set at the top, bottom or side of the shell 1114. The pressure relief mechanism 1111 can also be set between the positive electrode terminal 1112 and the negative electrode terminal 1113. The present application does not make any specific restrictions on this, as long as the internal pressure of the battery cell 111 can be released.

[0087] In some embodiments, Figure 5As shown, the battery 11 also includes a box body 113, and the box body 113 has a plurality of walls, and the plurality of walls are used to enclose a receiving cavity for receiving the battery cell 111, and at least one of the plurality of walls has a hollow inner cavity, and the hollow inner cavity is used to form a discharge channel 112. The box body 113 can be sealed or unsealed. For example, the box body 113 includes a top wall (not shown) located at the top, a bottom wall 1131 located at the bottom, and side walls 1132 located around the bottom wall 1131, and the top wall and the bottom wall 1131 are respectively covered at the openings at both ends of the side wall 1132, and then enclose together with the side wall 1132 to form a receiving cavity. Of course, the side wall 1132 can be formed by four sub-side walls connected end to end, or it can be an integral part. The box body 113 is used to protect the battery cell 111 placed in the accommodating cavity, and a hollow inner cavity forming a discharge channel 112 is set in at least one of the multiple walls of the box body 113, which can facilitate the relative arrangement of the pressure relief mechanism 1111 of the battery cell 111 and the hollow inner cavity, so that when the internal pressure or temperature of the battery cell 111 reaches a threshold value, the emissions of the battery cell 111 can be discharged into the hollow inner cavity.

[0088] Furthermore, the bottom wall 1131 is used to support the battery cell 111, and the bottom wall 1131 has a hollow inner cavity. Correspondingly, the pressure relief mechanism 1111 on the battery cell 111 is also arranged at the bottom of the housing 1114. In this way, the emissions in the battery cell 111 are released downward and enter the hollow inner cavity at the bottom through the pressure relief mechanism 1111. This arrangement of the battery 11 allows the battery 11 to release emissions to the bottom of the vehicle 1 after it is placed in the battery compartment of the vehicle 1, rather than to the passenger compartment above the battery compartment, thereby further increasing the safety of the battery 11.

[0089] In some embodiments, in order to facilitate the timely and effective discharge of the exhaust of the battery cell 111 into the exhaust channel 112, the pressure relief mechanism 1111 of the battery cell 111 is configured to be connected to the exhaust channel 112. The communication mode between the pressure relief mechanism 1111 of the battery cell 111 and the hollow inner cavity forming the exhaust channel 112 on the box body 113 is described by the following two embodiments. It should be noted that the following two embodiments are only exemplary of two feasible embodiments, rather than limiting the communication mode between the pressure relief mechanism 1111 of the battery cell 111 and the hollow inner cavity.

[0090] In one embodiment, at least one wall of the box 113 of the battery 11 is configured to be destroyed when the pressure relief mechanism 1111 is actuated, so that the discharge from the battery cell 111 passes through the at least one wall into the discharge channel 112. In other words, at least one wall of the box 113 is provided with a hollow inner cavity, which may be the top wall, the bottom wall 1131 or the side wall 1132 mentioned above, and the portion of the box 113 opposite to the pressure relief mechanism 1111 of the battery cell 111 has a complete wall surface when the pressure relief mechanism 1111 is not actuated, that is, the portion of the box 113 opposite to the pressure relief mechanism 1111 of the battery cell 111 does not have a hole structure connected to the hollow inner cavity when the pressure relief mechanism 1111 is not actuated. However, when the internal pressure or temperature of the battery cell 111 reaches a threshold value, the pressure relief mechanism 1111 of the battery cell 111 is actuated, and the emissions inside the battery cell 111 are released, the emissions released by the battery cell 111 can act on at least one wall of the box body 113, so that the part of the box body 113 opposite to the pressure relief mechanism 1111 of the battery cell 111 is destroyed (damaged or ruptured), so that the hollow inner cavity of the box body 113 is connected to the pressure relief mechanism 1111, so that the emissions inside the battery cell 111 can be discharged into the emission channel 112 in a timely and effective manner.

[0091] In another embodiment, if Figure 5 As shown, at least one wall of the box body 113 of the battery 11 is provided with a first through hole 1133, which may be the top wall, bottom wall 1131 or side wall 1132 mentioned above, and the first through hole 1133 is configured to communicate with the exhaust channel 112, so that when the pressure relief mechanism 1111 is actuated, the exhaust from the battery cell 111 enters the exhaust channel 112 through the first through hole 1133. When the internal pressure or temperature of the battery cell 111 reaches a threshold value, the pressure relief mechanism of the battery cell 111 is actuated, and the exhaust inside the battery cell 111 is released, the exhaust released by the battery cell 111 enters the hollow inner cavity of the box body 113 through the first through hole 1133, so that the exhaust inside the battery cell 111 can be discharged into the exhaust channel 112 in a timely and effective manner.

[0092] The battery 11 provided in the embodiment of the present application is provided with a pressure relief mechanism 1111 on at least two battery cells 111 to release the internal pressure when the internal pressure or temperature of the battery cell 111 reaches a threshold value, and the pressure relief mechanisms 1111 on at least two battery cells 111 are respectively arranged relative to each mutually isolated discharge channel 112 to achieve that when the internal pressure or temperature of each battery cell 111 reaches a threshold value, the emissions inside at least two battery cells 111 can be discharged through different discharge channels 112, the emissions inside the battery cells 111 can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cells 111 clogging the discharge channel 112 is effectively reduced, thereby improving the safety of the battery 11.

[0093] In some embodiments, Figure 4 , Figure 5 As shown in FIG. 10 , at least two battery cells 111 in the battery 11 include a first battery cell 1115 and a second battery cell 1116 that are adjacent to each other. The pressure relief mechanism 1111 of the first battery cell 1115 and the pressure relief mechanism 1111 of the second battery cell 1116 are respectively arranged relative to different exhaust channels 112. In this way, the adjacent first battery cell 1115 and the second battery cell 1116 can release emissions through different exhaust channels 112 respectively, so that the first battery cell 1115 and the second battery cell 1116 can release emissions to the outside of the shell in a timely and effective manner, effectively reducing the high-temperature and high-pressure gas released by the first battery cell 1115 so that the adjacent second battery cell 1116 will quickly fail due to thermal failure, that is, effectively reducing the chain reaction when the pressure relief mechanism is actuated, that is, heat diffusion, thereby effectively reducing the probability that the adjacent first battery cell 1115 and the second battery cell 1116 will both fail due to thermal failure in a short period of time, and the emissions will all enter the same exhaust channel 112, causing the exhaust channel 112 to be blocked, thereby improving the safety of the battery 11.

[0094] The first battery cell 1115 and the second battery cell 1116 may be the same battery cell 111 or different battery cells 111. The "same" mentioned here means that the first battery cell 1115 and the second battery cell 1116 are basically consistent in terms of chemical system, shape, size, volume, mass, energy density, etc., and the "different" mentioned here means that at least one of the first battery cell 1115 and the second battery cell 1116 has a significant difference in terms of chemical system, shape, size, volume, mass, energy density, etc. In some embodiments, the energy density of the first battery cell 1115 is greater than the energy density of the second battery cell 1116, where energy density refers to the energy released by the battery 11 per unit mass or unit volume, that is, weight energy density or volume energy density. In some embodiments, the ratio of the energy density E1 of the first battery cell 1115 to the energy density E2 of the second battery cell 1116 satisfies: 1.26≤E1 / E2≤2.14. In some embodiments, the first battery cell 1115 is, for example, a ternary lithium battery cell, specifically, a nickel cobalt manganese oxide lithium battery cell or a nickel cobalt aluminum oxide lithium battery cell, and the second battery cell 1116 is, for example, a lithium iron phosphate battery cell or a lithium cobalt oxide battery cell. It is worth noting that when the energy density of the first battery cell 1115 is greater than the energy density of the second battery cell 1116, and the first battery cell 1115 and the second battery cell 1116 are arranged adjacent to each other, the thermal failure reaction of the first battery cell 1115 is usually more intense, and the first battery cell 1115 and the second battery cell 1116 are adjacent to each other, which is conducive to reducing the chain reaction of thermal failure, that is, it is conducive to slowing down the spread of heat diffusion, and further improving the safety of the battery 11.

[0095] In some embodiments, regardless of whether the first battery cell 1115 and the second battery cell 1116 are the same battery cell 111 or different battery cells 111, the arrangement of the first battery cell 1115 and the second battery cell 1116 can be: the first battery cell 1115 and the second battery cell 1116 are alternately arranged in an arrangement of n first battery cells 1115 and m second battery cells 1116, where n≥1, m≥1, and n and m are both integers.

[0096] The values ​​of n and m may be the same or different. For example, in some embodiments, Figure 2 , Figure 4 and Figure 5As shown, the values ​​of n and m are both 1, that is, n=1, m=1. At this time, the first battery cells 1115 and the second battery cells 1116 are arranged in a row or a column one by one, that is, one second battery cell 1116 is arranged between two adjacent first battery cells 1115, and one first battery cell 1115 is arranged between two adjacent second battery cells 1116; for another example, in some embodiments, Figure 3 As shown, the values ​​of n and m are both 6, that is, n=6, m=6. At this time, six first battery cells 1115 and six second battery cells 1116 form an arrangement unit. There are three arrangement units, and the arrangement direction of the three arrangement units is along Figure 3 The Y-axis direction is shown, and the six first battery cells 1115 and the six second battery cells 1116 in each arrangement unit are arranged along Figure 3 The arrangement in the X direction is shown, and in two adjacent arrangement units, the first battery unit 1115 and the second battery unit 116 are arranged staggered with each other; for example, in some other embodiments, Fig.10 As shown, the value of n is 2, the value of m is 2, that is, n=2, m=2, at this time, the first battery cell 1115 and the second battery cell 1116 are arranged in a row or a column with two first battery cells 1115 and two second battery cells 1116 spaced apart in pairs, that is, the arrangement unit composed of two first battery cells 1115 and two second battery cells 1116 is arranged cyclically along a row or a column. It can be understood that the value of n and the value of m can also be other values, which are not enumerated here.

[0097] In some embodiments, the number of first battery cells 1115 is at least two, and the pressure relief mechanisms 1111 of two adjacent first battery cells 1115 are respectively arranged relative to different emission channels 112. In this way, different first battery cells 1115 can release emissions through different emission channels 112, respectively, so that the emissions of the first battery cells 1115 can be discharged to the outside of the battery 11 in a timely and effective manner. Moreover, the thermal failure of the first battery cell 1115 can be effectively reduced to cause the thermal failure of the second battery cell 1116, which is conducive to alleviating the chain reaction of thermal failure and improving the safety of the battery 11.

[0098] In other embodiments, there are at least two second battery cells 1116, and the pressure relief mechanisms 1111 of two adjacent second battery cells 1116 are respectively arranged relative to different emission channels 112. In this way, different second battery cells 1116 can release emissions through different emission channels 112, thereby allowing the emissions of the second battery cells 1116 to be discharged to the outside of the battery 11 in a timely and effective manner.

[0099] In addition, in some other embodiments, the number of at least two discharge channels 112 is two, the pressure relief mechanisms 1111 on all the first battery cells 1115 are connected to one of the discharge channels 112, and the pressure relief mechanisms 1111 of all the second battery cells 1116 are connected to the other discharge channel 112. In this case, two mutually isolated discharge channels 112 can be set on, for example, the bottom wall 1131. Exemplarily, the first battery cells 1115 and the second battery cells 1116 are arranged in a row, and the lengths and widths of the first battery cells 1115 and the second battery cells 1116 can be substantially the same, and the thicknesses can be the same or different. Similarly, the pressure relief mechanism 1111 on the first battery cell 1115 is one quarter of the width of the first battery cell 1115 away from one side edge thereof, the pressure relief mechanism 1111 on the second battery cell 1116 is one quarter of the width of the second battery cell 1116 away from one side edge thereof, and the pressure relief mechanism 1111 on the first battery cell 1115 and the pressure relief mechanism 1111 on the second battery cell 1116 are not arranged in a colinear manner, that is, the pressure relief mechanism 1111 on the first battery cell 1115 and the pressure relief mechanism 1111 on the second battery cell 1116 are alternately arranged in the arrangement direction of the first battery cell 1115 and the second battery cell 1116. In this way, the pressure relief mechanism 1111 on the first battery cell 1115 is arranged opposite to a discharge channel 112 on the bottom wall 1131, and the pressure relief mechanism 1111 of the second battery cell 1116 is arranged opposite to another discharge channel 112 on the bottom wall 1131, so that when the internal pressure or temperature of the first battery cell 1115 reaches a threshold value, the discharge inside the first battery cell 1115 is released from one of the discharge channels 112, and when the internal pressure or temperature of the second battery cell 1116 reaches a threshold value, the discharge inside the second battery cell 1116 is released from one of the discharge channels 112, thereby making it possible for the discharges of the first battery cell 1115 and the second battery cell 1116 to be discharged to the outside of the battery 11 in a timely and effective manner, thereby improving the safety of the battery 11.

[0100] Of course, in alternative implementations of the above implementations, if Fig.11 and Fig.12 As shown, the pressure relief mechanism 1111 on the first battery cell 1115 can be located at a distance of one quarter of the width of the first battery cell 1115 from one side edge thereof, and the pressure relief mechanism 1111 on the second battery cell 1116 can be located at a distance of one half of the width of the second battery cell 1116 from one side edge thereof. At this time, the pressure relief mechanism 1111 on the first battery cell 1115 and the pressure relief mechanism 1111 on the second battery cell 1116 are not arranged in the same line.

[0101] Of course, in other embodiments, the total number of first battery cells 1115 may be greater than or equal to two, the number of at least two exhaust channels 112 is three, one of which is located between the other two exhaust channels 112, the pressure relief mechanisms 1111 on any two adjacent first battery cells 1115 can be communicated with two of the exhaust channels 112 respectively, and the pressure relief mechanism 1111 of the second battery cell 1116 can be communicated with the other exhaust channel 112. Furthermore, any two adjacent first battery cells 1115 can be communicated with the exhaust channels 112 located on both sides, and the pressure relief mechanism 1111 of the second battery cell 1116 can be communicated with the exhaust channel 112 located in the middle.

[0102] Alternatively, in some embodiments, at least two exhaust channels 112 can be connected to the first battery cell 1115, and the pressure relief mechanisms 1111 of two adjacent first battery cells 1115 can be connected to different exhaust channels 112 respectively, while the second battery cell 1116 is not provided with an exhaust channel 112 opposite thereto.

[0103] like Fig.10As shown, in the battery 11 of the present application, in some embodiments, a first thermal insulator 114 is further provided between two adjacent first battery cells 1115. When one of the first battery cells 1115 fails thermally, the first thermal insulator 114 can effectively prevent the first battery cell 1115 adjacent to the first battery cell 1115 that fails thermally from failing thermally. In some embodiments, a second thermal insulator 115 is further provided between adjacent second battery cells 1116. When one of the second battery cells 1116 fails thermally, the second thermal insulator 115 can effectively prevent the second battery cell 1116 adjacent to the second battery cell 1116 that fails thermally from failing thermally. In some embodiments, a third thermal insulator 116 is further provided between adjacent first battery cells 1115 and second battery cells 1116. When one of the first battery cells 1115 fails thermally, the third thermal insulator 116 can effectively prevent the second battery cell 1116 adjacent to the first battery cell 1115 that fails thermally from failing thermally, and vice versa. In some embodiments, at least one of the first thermal insulation 114, the second thermal insulation 115, and the third thermal insulation 116 is included in the battery 11. In some embodiments, the first thermal insulation 114, the second thermal insulation 115, and the third thermal insulation 116 can be at least one of foam, rubber, thermal insulation cotton, and aerogel thermal insulation pads. In some embodiments, the first thermal insulation 114, the second thermal insulation 115, and the third thermal insulation 116 can be configured as a mouth frame structure, and further, the first thermal insulation 114, the second thermal insulation 115, and the third thermal insulation 116 also include a filler for filling the hollow part of the mouth frame, and the filler has elasticity, wherein the filler is selected from at least one of foam, rubber, thermal insulation cotton, and aerogel thermal insulation pads.

[0104] In some embodiments, the area of ​​the pressure relief mechanism 1111 of the first battery cell 1115 is greater than the area of ​​the pressure relief mechanism 1111 of the second battery cell 1116. It is worth noting that in this embodiment, the energy density of the first battery cell 1115 is generally greater than the energy density of the second battery cell 1116. In this way, even if the thermal failure reaction of the first battery cell 1115 is more intense, the first battery cell 1115 can be discharged to the outside of the battery 11 in time through the pressure relief mechanism 1111 of the first battery cell 1115 with a larger area. At this time, the second battery cell 1116 can also be discharged to the outside of the battery 11 in time through the pressure relief mechanism 1111 of the second battery cell 1116, thereby improving the safety of the battery 11. In some embodiments, the ratio of the area A1 of the first pressure relief mechanism 1111 to the area A2 of the second pressure relief mechanism 1111 satisfies: 1.5≤A1 / A2≤4.

[0105] It should be noted that, in some embodiments, the battery 11 further includes a thermal management component 117 for containing a fluid to adjust the temperature of the battery cell 111, and the thermal management component 117 is disposed between the battery cell 111 and at least one wall. By providing the thermal management component 117, and limiting the thermal management component 117 to be disposed between the battery cell 111 and at least one wall, the temperature of the battery cell 111 can be adjusted, so that the battery cell 111 can be charged and discharged more efficiently and safely. The fluid here can be a liquid or a gas, and adjusting the temperature refers to heating or cooling the battery cell 111. In the case of cooling or lowering the temperature of the battery cell 111, the thermal management component 117 is used to contain a cooling fluid to lower the temperature of the battery cell 111. At this time, the thermal management component 117 can also be referred to as a cooling component, a cooling system or a cooling plate, etc., and the fluid contained therein can also be referred to as a cooling medium or a cooling fluid, and more specifically, can be referred to as a cooling liquid or a cooling gas. In addition, the thermal management component 117 can also be used to contain a heating fluid to heat the battery cell 111, which is not limited in the embodiments of the present application. Optionally, the fluid may be circulated to achieve a better temperature regulation effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, or air.

[0106] Among them, the thermal management component 117 is constructed to be destroyed (damaged or ruptured) when the pressure relief mechanism 1111 is actuated to allow the fluid to flow out. That is, when the internal pressure or temperature of the battery cell 111 reaches a threshold and needs to release high-temperature and high-pressure gas, the thermal management component 117 uses the emissions released by the battery cell 111 to act on the thermal management component 117, thereby destroying the thermal management component 117, and the emissions of the battery cell 111 can enter the exhaust channel 112 (i.e., the hollow inner cavity of the box body 113) through the destroyed thermal management component 117. And because the thermal management component 117 is destroyed, the outflowing fluid, such as coolant, absorbs a large amount of heat and vaporizes, which can quickly reduce the temperature inside the battery 11, which is conducive to alleviating the chain reaction of thermal failure and improving the safety of the battery 11.

[0107] For example, Figure 5As shown, the thermal management component 117 is, for example, a water cooling plate, in which a fluid channel is provided, one end of the fluid channel forms a water inlet, and the other end of the water flow channel forms a water outlet. When the battery cell 111 works normally, the temperature of the battery cell 111 is adjusted by adjusting the water temperature in the water cooling plate, so that the charging and discharging of the battery cell 111 works within a reasonable temperature range, thereby improving the charging efficiency and discharging efficiency of the battery 11. When the battery cell 111 fails thermally, the internal pressure released by the battery cell 111 causes the water cooling plate to break, thereby causing the water inside the water cooling plate to vaporize, thereby absorbing the heat of the high-temperature gas released by the battery cell 111, further reducing the probability of combustion and explosion of the battery cell 111, and improving the safety of the battery 11.

[0108] Optionally, the thermal management component 117 is provided with a second through hole 1171, and the second through hole 1171 is configured to be able to communicate with the exhaust channel 112, so that when the pressure relief mechanism 1111 is actuated, the exhaust from the battery cell 111 enters the exhaust channel 112 through the second through hole 1171. Optionally, the second through hole 1171 can be set to be greater than or equal to the area of ​​the pressure relief mechanism 1111 provided on the battery cell 111. In this way, when the internal pressure or temperature of the battery cell 111 reaches a threshold value, the pressure relief mechanism 1111 of the battery cell 111 is actuated, and the exhaust inside the battery cell 111 is released, the exhaust released by the battery cell 111 can quickly and smoothly enter the exhaust channel 112 (i.e., the hollow inner cavity of the box body 113) through the second through hole 1171, so that the exhaust inside the battery cell 111 can be discharged into the exhaust channel 112 in a timely and effective manner. Further, when at least one wall of the box body 113 is provided with a first through hole 1133, and the first through hole 1133 is configured to be connected to the exhaust channel 112, at this time, the second through hole 1171 is connected to the exhaust channel 112 via the first through hole 1133, and the emissions released by the battery cell 111 enter into the exhaust channel 112 (i.e., the hollow inner cavity of the box body 113) through the second through hole 1171 and the first through hole 1133 in sequence. In this way, the emissions inside the battery cell 111 can be discharged into the exhaust channel 112 in a timely and effective manner.

[0109] It is worth noting that, in the above embodiment, the second through hole 1171 needs to correspond to the first through hole 1133 one by one. Fig.13 Two discharge passages 112 are provided on the bottom wall 1131. Fig.14 A plurality of first through holes 1133 communicating with the two discharge passages 112 are provided on the bottom wall 1131. Fig.15 The thermal management component 117 is provided with a plurality of second through holes 1171 corresponding to the first through holes 1133 one by one.

[0110] Combined with the above Figures 1 to 15 The battery 11 of the embodiment of the present application has been described. The preparation method and equipment of the battery 11 of the embodiment of the present application will be described below. For the parts not described in detail, please refer to the aforementioned embodiments.

[0111] The present embodiment provides a method for preparing a battery 11, which comprises the following steps:

[0112] At least two battery cells 111 are configured, and at least two battery cells 111 each include a pressure relief mechanism 1111, and the pressure relief mechanism 1111 is used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell 111 reaches a threshold value;

[0113] At least two exhaust channels 112 are configured, each exhaust channel 112 is isolated from each other and arranged opposite to the pressure relief mechanism 1111 , and the at least two exhaust channels 112 are configured to respectively collect exhaust from the corresponding battery cells 111 when the pressure relief mechanism 1111 is actuated.

[0114] The preparation method of the battery provided in this embodiment configures at least two battery cells 111 and at least two emission channels 112, and the at least two emission channels 112 are configured to respectively collect emissions from the corresponding battery cells 111 when the pressure relief mechanism 1111 of the battery cell 111 is actuated, so that when the internal pressure or temperature of each battery cell 111 reaches a threshold, the emissions inside at least two battery cells 111 can be discharged through different emission channels 112, the emissions inside the battery cells 111 can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cells 111 clogging the emission channels 112 is effectively reduced, thereby improving the safety of the battery 11.

[0115] The present application embodiment provides a device for preparing a battery 11, which includes:

[0116] A battery cell configuration module, used to configure at least two battery cells 111, wherein the at least two battery cells 111 each include a pressure relief mechanism 1111, and the pressure relief mechanism 1111 is used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell 111 reaches a threshold value;

[0117] The exhaust channel configuration module is used to configure at least two exhaust channels 112, each exhaust channel 112 is isolated from each other and arranged opposite to the pressure relief mechanism 1111, and at least two exhaust channels 112 are configured to collect exhaust from corresponding battery cells 111 respectively when the pressure relief mechanism 1111 is actuated.

[0118] The preparation device of the battery 11 provided in the present embodiment configures at least two battery cells 111 through a battery cell configuration module, and configures at least two emission channels 112 through an emission channel configuration module, and the at least two emission channels 112 are configured to respectively collect emissions from the corresponding battery cells 111 when the pressure relief mechanism 1111 of the battery cell 111 is actuated, so that when the internal pressure or temperature of each battery cell 111 reaches a threshold value, the emissions inside at least two battery cells 111 can be discharged through different emission channels 112, the emissions inside the battery cell 111 can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cell 111 clogging the emission channel 112 is effectively reduced, thereby improving the safety of the battery 11.

[0119] The battery preparation device provided in this embodiment can be applied to the battery preparation method 11 in the above embodiment, that is, the battery preparation method in the above embodiment can be specifically implemented by using the battery preparation device 11 of this embodiment.

[0120] In summary, the battery 11, device, battery preparation method and battery preparation device provided in the present application, when the pressure relief mechanism 1111 of the battery cell 111 is actuated, are configured through at least two discharge channels 112 to respectively collect emissions from the corresponding battery cells 111, so that the emissions inside at least two battery cells 111 can be discharged through different discharge channels 112, the emissions inside the battery cells 111 can be discharged in a timely and effective manner, and the possibility of solid matter released by the battery cells 111 clogging the emission channels 112 is effectively reduced, thereby improving the safety of the battery 11.

[0121] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0122] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: at least two battery cells, each of the at least two battery cells comprising a pressure relief mechanism, the pressure relief mechanism being configured to be actuated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; At least two exhaust channels are isolated from each other and arranged opposite to the pressure relief mechanism, and the at least two exhaust channels are configured to respectively collect exhaust from the corresponding battery cells when the pressure relief mechanism is actuated.

2. The battery according to claim 1, characterized in that The at least two battery cells include a first battery cell and a second battery cell that are adjacently disposed, and the pressure relief mechanism of the first battery cell and the pressure relief mechanism of the second battery cell are respectively disposed opposite to different exhaust passages.

3. The battery according to claim 2, characterized in that The energy density of the first battery cell is greater than the energy density of the second battery cell.

4. The battery according to claim 2, characterized in that The first battery cells and the second battery cells are alternately arranged in an arrangement of n first battery cells and m second battery cells, wherein n≥1 and m≥1.

5. The battery according to claim 2, characterized in that The first battery cells are provided with at least two, and the pressure relief mechanisms of two adjacent first battery cells are respectively arranged opposite to different discharge channels; and / or, The number of the second battery cells is at least two, and the pressure relief mechanisms of two adjacent second battery cells are respectively arranged opposite to different discharge channels.

6. The battery according to claim 5, characterized in that A first heat insulating member is disposed between two adjacent first battery cells; and / or a second heat insulating member is disposed between two adjacent second battery cells.

7. The battery according to claim 2, characterized in that A third heat insulating member is disposed between adjacent first battery cells and second battery cells.

8. The battery according to claim 2, characterized in that The area of ​​the pressure relief mechanism of the first battery cell is larger than the area of ​​the pressure relief mechanism of the second battery cell.

9. The battery according to any one of claims 1 to 8, characterized in that: The battery further comprises a box having a plurality of walls, wherein the plurality of walls are used to enclose and form a receiving cavity for receiving the battery cells, and at least one of the plurality of walls has a hollow inner cavity, wherein the hollow inner cavity is used to form the discharge channel.

10. The battery according to claim 9, characterized in that The plurality of walls include a bottom wall for supporting the battery cell, the bottom wall having the hollow inner cavity.

11. The battery according to claim 9, characterized in that The at least one wall is configured to be breached when the pressure relief mechanism is actuated to allow exhaust from the battery cell to pass through the at least one wall into the exhaust passage.

12. The battery according to claim 9, characterized in that The at least one wall is provided with a first through hole configured to communicate with the exhaust passage so that exhaust from the battery cell enters the exhaust passage via the first through hole when the pressure relief mechanism is actuated.

13. The battery according to claim 12, characterized in that The battery further comprises a heat management component for containing a fluid to adjust the temperature of the battery cell, the heat management component being disposed between the battery cell and the at least one wall, and being configured to be destroyed when the pressure relief mechanism is actuated to allow the fluid to flow out.

14. The battery according to claim 13, characterized in that The heat management component is provided with a second through hole configured to communicate with the exhaust passage so that exhaust from the battery cell enters the exhaust passage through the second through hole when the pressure relief mechanism is actuated.

15. The battery according to claim 14, characterized in that The second through hole communicates with the exhaust passage via the first through hole.

16. A device, characterized in that: The battery comprising any one of claims 1 to 15 is used for providing electrical energy.

17. A method for preparing a battery, characterized in that: The steps include: Arrange at least two battery cells, each of the at least two battery cells comprises a pressure relief mechanism, the pressure relief mechanism is used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; At least two exhaust channels are configured, each of which is isolated from each other and arranged opposite to the pressure relief mechanism, and the at least two exhaust channels are configured to respectively collect exhaust from the corresponding battery cells when the pressure relief mechanism is actuated.

18. A battery manufacturing device, characterized in that: include: A battery cell configuration module, configured to configure at least two battery cells, each of the at least two battery cells comprising a pressure relief mechanism, the pressure relief mechanism being configured to be actuated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; The exhaust channel configuration module is used to configure at least two exhaust channels, each of which is isolated from each other and arranged opposite to the pressure relief mechanism, and the at least two exhaust channels are configured to respectively collect exhaust from the corresponding battery cells when the pressure relief mechanism is actuated.

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