Battery, device, battery manufacturing method and manufacturing device

Abstract

The present application provides a battery, device, and battery manufacturing method and manufacturing apparatus, which are related to the technical field of energy storage and are used to solve the problem of poor battery safety in use. The battery includes a first battery cell and a second battery cell, the first battery cell including a first pressure release mechanism, and the second battery cell including a second pressure release mechanism, the energy density of the first battery cell being greater than the energy density of the second battery cell, and the area of ​​the first pressure release mechanism being greater than the area of ​​the second pressure release mechanism. The device includes the above battery. The battery manufacturing method includes the steps of positioning the first battery cell and positioning the second battery cell. The battery manufacturing apparatus includes a first battery cell positioning module and a second battery cell positioning module, and the battery, device, battery manufacturing method, and manufacturing apparatus provided herein improve the battery safety in use.

Description

[Technical field]

[0001] The present application relates to the technical field of energy storage, and in particular to batteries, devices, methods and apparatus for manufacturing batteries. [Background technology]

[0002] Energy saving and emission reduction are the keys to the sustainable development of the automobile industry. In this case, electric vehicles are important for the sustainable development of the automobile industry due to their advantages of energy saving and environmental protection. For electric vehicles, battery technology is one of the important factors in 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 a battery cannot be ensured, the battery cannot be used. Therefore, how to enhance the safety of the battery is an urgent technical issue that needs to be solved in battery technology. Summary of the Invention [Means for solving the problem]

[0003] In view of the above problems, embodiments of the present application provide a battery, an apparatus, a method for manufacturing a battery, and an apparatus for manufacturing a battery, in order to improve the safety of using the battery.

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

[0005] In a first aspect of an embodiment of the present application, a battery is provided, a first battery cell including a first pressure release mechanism, the first pressure release mechanism being adapted to be activated to release the internal pressure of the first battery cell when the internal pressure or temperature of the first battery cell reaches a threshold; a second battery cell including a second pressure release mechanism, the second pressure release mechanism being adapted to be activated to release the internal pressure of the second battery cell when the internal pressure or temperature of the second battery cell reaches a threshold; The energy density of the first battery cell is greater than the energy density of the second battery cell, and the area of ​​the first pressure release mechanism is greater than the area of ​​the second pressure release mechanism.

[0006] Compared with the prior art, the battery provided by the embodiment of the present application has the following advantages:

[0007] In the battery provided in the embodiments of the present application, a first battery cell is provided with a first pressure release mechanism, so that when the internal pressure or temperature of the first battery cell reaches a threshold value, the first battery cell can release its internal pressure; a second battery cell is provided with a second pressure release mechanism, so that when the internal pressure or temperature of the second battery cell reaches a threshold value, the second battery cell can also release its internal pressure; the energy density of the first battery cell is greater than that of the second battery cell, and the failure reaction of a thermal failure of the first battery cell is more serious than that of the second battery cell; the area of ​​the first pressure release mechanism is limited to be greater than that of the second pressure release mechanism, so that the first battery cell with a more serious failure reaction can timely and effectively release pressure through the first pressure release mechanism with a larger area, which can effectively mitigate the rapid temperature rise of the first battery cell, and further effectively reduce the probability of a chain reaction caused by a thermal failure of the first battery cell, thereby improving the safety of the entire battery.

[0008] In some embodiments, the ratio of the area A1 of the first pressure release mechanism to the area A2 of the second pressure release mechanism satisfies 1.5≦A1 / A2≦4, so that both the first battery cell and the second battery cell can release pressure in a timely and effective manner, thereby improving the safety of battery use.

[0009] In some embodiments, the ratio of the energy density E1 of the first battery cell to the energy density E2 of the second battery cell satisfies 1.26≦E1 / E2≦2.14, thereby ensuring the safety of the battery while improving the capacity of the battery.

[0010] In some embodiments, the first battery cells and the second battery cells are alternately arranged in an array of n first battery cells and m second battery cells, where n≧m≧1. This is advantageous in slowing down the spread of heat diffusion by spacing the first battery cells and the second battery cells, which have different energy densities, apart from each other, and further improves the safety of the battery.

[0011] In some embodiments, the battery further includes a vent channel, the vent channel is located opposite the first pressure release mechanism and / or the second pressure release mechanism, and the vent channel is configured to collect effluent from the first battery cell when the first pressure release mechanism is activated and / or collect effluent from the second battery cell when the second pressure release mechanism is activated. By providing the vent channel, the internal pressures of the first battery cell and the second battery cell can be timely released when the internal pressures and temperatures of the first battery cell and the second battery cell reach thresholds, further improving the safety of the battery.

[0012] In some embodiments, at least two exhaust channels are provided, each exhaust channel is provided separately from the other, and the first pressure release mechanism and the second pressure release mechanism are provided opposite different exhaust channels, so that the exhaust from the first battery cell and the second battery cell can be timely and effectively discharged to the outside of the battery, and the possibility that the solid materials discharged from the first battery cell and the second battery cell will block the exhaust channel is effectively reduced, thereby improving the safety of the battery.

[0013] In some embodiments, at least two first battery cells are installed, and the first pressure release mechanisms of two adjacent first battery cells are installed facing different exhaust channels, so that different first battery cells can discharge exhaust through different exhaust channels, and the exhaust of the first battery cells can be timely and effectively discharged to the outside of the battery, which can effectively reduce the probability of thermal failure of the adjacent first battery cells due to thermal failure of the first battery cell, and further mitigate the chain reaction caused by thermal failure, which is beneficial for improving the safety of the battery.

[0014] In some embodiments, at least two second battery cells are installed, and the second pressure release mechanisms of two adjacent second battery cells are installed facing different exhaust channels, so that different second battery cells can discharge exhaust through different exhaust channels, and the exhaust of the second battery cells can be timely and effectively discharged to the outside of the battery. The probability of thermal failure of the adjacent second battery cells due to thermal failure of the second battery cell can be effectively reduced, and the chain reaction caused by thermal failure can be mitigated, which is advantageous to improving the safety of the battery.

[0015] In some embodiments, the battery further includes a housing, the housing having a plurality of walls, the plurality of walls being used to define a receiving cavity for receiving the first battery cell and the second battery cell, at least one of the plurality of walls having a hollow chamber for forming a discharge channel, the housing being used to protect the first battery cell and the second battery cell disposed in the receiving cavity, at least one of the plurality of walls of the housing being provided with a hollow chamber for forming a discharge channel, so that when the internal pressure or temperature of the first battery cell and the second battery cell reaches a threshold value, the discharge of the first battery cell and the second battery cell can be discharged into the hollow chamber in a timely and effective manner in the event of a thermal failure of the first battery cell and the second battery cell, and the use safety of the battery is improved.

[0016] In some embodiments, the walls are used to support the first battery cell and the second battery cell and include a bottom wall having a hollow chamber such that waste within the first battery cell is discharged downwardly and through the pressure release mechanism into the bottom hollow chamber and waste within the second battery cell is discharged downwardly and through the second pressure release mechanism into the bottom hollow chamber; with this configuration of the battery, when placed in a battery compartment of a vehicle, the battery discharges waste into the bottom of the vehicle rather than into the passenger compartment located above the battery compartment, thereby further improving the safety of use of the battery.

[0017] In some embodiments, at least one wall is configured to break when the first pressure release mechanism and / or the second pressure release mechanism are activated such that effluent from the first battery cell and / or the second battery cell passes through the at least one wall and enters the corresponding effluent channel, thereby activating the first pressure release mechanism of the first battery cell when the internal pressure or temperature of the first battery cell reaches a threshold value and evacuating effluent from within the first battery cell and / or activating the second pressure release mechanism of the second battery cell when the internal pressure or temperature of the second battery cell reaches a threshold value. When activated and the exhaust material inside the second battery cell is discharged, the exhaust material discharged from the first battery cell and / or the second battery cell acts on at least one wall of the housing, thereby destroying the part of the housing facing the first pressure release mechanism and / or the part of the housing facing the second pressure release mechanism, and the hollow chamber of the housing communicates with the first pressure release mechanism and / or the second pressure release mechanism, thus realizing the timely and effective discharge of the exhaust material inside the first battery cell and / or the second battery cell to the discharge channel, further improving the safety of the battery in use.

[0018] In some embodiments, at least one wall is provided with a first through hole, and the first through hole is configured to communicate with the exhaust channel such that when the first battery cell and / or the second battery cell are operated, exhaust from the first battery cell and / or the second battery cell enters the corresponding exhaust channel through the first through hole. Thus, when the first pressure release mechanism of the first battery cell is activated and exhaust from the first battery cell is discharged when the internal pressure or temperature of the first battery cell reaches a threshold value, and / or when the second pressure release mechanism of the second battery cell is activated and exhaust from the second battery cell is discharged when the internal pressure or temperature of the second battery cell reaches a threshold value, the exhaust discharged from the first battery cell and / or the second battery cell enters the hollow chamber of the housing through the first through hole, and the exhaust from the first battery cell and / or the second battery cell is discharged to the exhaust channel in a timely and effective manner, thereby further improving the safety of the battery.

[0019] In some embodiments, the battery further includes a thermal management member for containing fluid and regulating a temperature of the first battery cell and the second battery cell, the thermal management member being disposed between the first battery cell and the second battery cell and the at least one wall, the thermal management member being configured to be destroyed when the first pressure release mechanism and / or the second pressure release mechanism is activated to allow the fluid to flow out, whereby the exhaust of the first battery cell and / or the second battery cell enters the exhaust channel through the destroyed thermal management member, and because the thermal management member is destroyed, the fluid is allowed to flow out, and the fluid further quickly reduces the internal temperature of the battery, which is advantageous in mitigating chain reactions due to thermal failure and improving the safety of use of the battery.

[0020] In some embodiments, the thermal management member is provided with a second through hole, and the second through hole is configured to communicate with the exhaust channel such that exhaust from the first battery cell and / or the second battery cell enters the corresponding exhaust channel through the second through hole when the first pressure release mechanism and / or the second pressure release mechanism is activated, thereby allowing the exhaust discharged from the first battery cell and / or the second battery cell to quickly and smoothly enter the exhaust channel through the second through hole, thereby improving the safety of the battery in use.

[0021] In some embodiments, the second through hole is connected to the exhaust channel via the first through hole, thereby allowing exhaust discharged from the first battery cell and / or the second battery cell to quickly and smoothly enter the first through hole via the second through hole and then into the exhaust channel, thereby improving the safety of the battery.

[0022] In a second aspect of the present embodiment, there is provided a device including the above battery for use in supplying electrical energy.

[0023] In the device of the present application, the area of ​​the first pressure release mechanism is limited to be larger than the area of ​​the second pressure release mechanism, so that the first battery cell, which has a more serious failure reaction, can have pressure released in a timely and effective manner by the first pressure release mechanism with a larger area, effectively mitigating the sudden temperature rise of the first battery cell, and further effectively reducing the probability of a chain reaction caused by thermal failure of the first battery cell, thereby improving the safety of use of the entire battery.

[0024] In a third aspect of the present embodiment, disposing a first battery cell, the first battery cell including a first pressure release mechanism, the first pressure release mechanism being adapted to be activated to release the internal pressure of the first battery cell when the internal pressure or temperature of the first battery cell reaches a threshold; disposing a second battery cell, the second battery cell including a second pressure release mechanism, the second pressure release mechanism being adapted to be activated to release the internal pressure of the second battery cell when the internal pressure or temperature of the second battery cell reaches a threshold; A method for manufacturing a battery is provided, wherein the energy density of the first battery cell is greater than the energy density of the second battery cell, and the area of ​​the first pressure release mechanism is greater than the area of ​​the second pressure release mechanism.

[0025] In the battery manufacturing method of this embodiment, a first battery cell with a high energy density and a second battery cell with a low energy density are arranged, and the first pressure release mechanism and area of ​​the arranged first battery cell are limited to be larger than the area of ​​the second pressure release mechanism of the second battery cell. Therefore, when the first battery cell and the second battery cell thermally fail, even if the failure reaction of the thermal failure of the first battery cell is more serious than the failure reaction of the thermal failure of the second battery cell, the first battery cell with the more serious failure reaction can timely and effectively release pressure through the first pressure release mechanism with a larger area, and the second battery cell can timely and effectively release pressure through the second pressure release mechanism. In this way, the sudden temperature rise of the first battery cell can be effectively alleviated, and the probability of a chain reaction caused by a thermal failure of the first battery cell can be effectively reduced, thereby improving the safety of use of the entire battery.

[0026] In a fourth aspect of an embodiment of the present application, there is provided a battery manufacturing apparatus including a first battery cell arrangement module and a second battery cell arrangement module.

[0027] The first battery cell arrangement module is used to arrange a first battery cell including a first pressure release mechanism, and the first pressure release mechanism is used to activate and release the internal pressure of the first battery cell when the internal pressure or temperature of the first battery cell reaches a threshold value; the second battery cell positioning module is used to position a second battery cell including a second pressure release mechanism, and the second pressure release mechanism is used to activate and release the internal pressure of the second battery cell when the internal pressure or temperature of the second battery cell reaches a threshold; The energy density of the first battery cell is greater than the energy density of the second battery cell, and the area of ​​the first pressure release mechanism is greater than the area of ​​the second pressure release mechanism.

[0028] In the battery manufacturing apparatus of this embodiment, a first battery cell with high energy density is arranged by a first battery cell arrangement module, and a second battery cell with low energy density is arranged by a second battery cell arrangement module. The area of ​​the first pressure release mechanism of the arranged first battery cell is limited to be larger than the area of ​​the second pressure release mechanism of the second battery cell. Therefore, when the first battery cell and the second battery cell are thermally broken, even if the failure reaction of the thermal failure of the first battery cell is more serious than the failure reaction of the thermal failure of the second battery cell, the first battery cell with the more serious failure reaction can timely and effectively release pressure through the first pressure release mechanism with a larger area, and the second battery cell can timely and effectively release pressure through the second pressure release mechanism. In this way, the sudden temperature rise of the first battery cell can be effectively alleviated, and the probability of a chain reaction caused by a thermal failure of the first battery cell can be effectively reduced, thereby improving the safety of the entire battery. [Brief description of the drawings]

[0029] [Figure 1] 1 is a structural schematic diagram of a vehicle according to the present application. [Diagram 2] FIG. 2 is a structural schematic diagram of a battery module according to an embodiment of the present application. [Diagram 3] 1 is a structural schematic diagram of a battery pack according to an embodiment of the present application. [Figure 4] 1 is a structural schematic diagram 1 of a battery according to an embodiment of the present application. [Diagram 5] FIG. 1 is a diagram showing an explosion of a battery according to an embodiment of the present application. [Figure 6] 2 is a structural schematic diagram 2 of a battery according to an embodiment of the present application. [Figure 7] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 8] FIG. 2 is a front view of a battery cell according to an embodiment of the present application. [Figure 9]FIG. 2 is a right side view of a battery cell according to an embodiment of the present application. [Figure 10] FIG. 2 is a top view of a battery cell according to an embodiment of the present application. [Figure 11] FIG. 2 is a diagram showing an explosion of a battery according to an embodiment of the present application. [Figure 12] 3 is a structural schematic diagram 3 of a battery according to an embodiment of the present application. [Figure 13a] FIG. 2 is a structural schematic diagram of a first battery cell according to an embodiment of the present application. [Figure 13b] FIG. 4 is a structural schematic diagram of a second battery cell according to an embodiment of the present application. [Figure 14] FIG. 3 is a diagram showing an explosion of a battery according to an embodiment of the present application. [Figure 15] 1 is a schematic diagram showing the structure of a bottom wall according to an embodiment of the present application; [Figure 16] FIG. 2 is a schematic diagram showing the structure of a bottom wall according to an embodiment of the present application; [Figure 17] 1 is a structural schematic diagram of a heat management member according to an embodiment of the present application. [Figure 18] FIG. 1 is a structural schematic diagram of a bottom wall according to another embodiment of the present application. [Figure 19] FIG. 2 is a schematic diagram showing the structure of a bottom wall according to another embodiment of the present application. [Figure 20] FIG. 4 is a structural schematic diagram of a heat management member according to another embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Batteries are devices for converting chemical energy into electrical energy and are widely used in fields such as new energy vehicles and energy storage power stations.

[0031] A conventional battery includes a housing and a plurality of battery cells installed in the housing, the plurality of battery cells being connected in series and / or parallel. The plurality of battery cells includes a first battery cell and a second battery cell, the energy density of the first battery cell is greater than the energy density of the second battery cell, the first battery cell is provided with a first pressure release mechanism, the first pressure release mechanism is used to release gas inside the first battery cell, thereby ensuring the safety of the first battery cell, and the second battery cell is provided with a second pressure release mechanism, the second pressure release mechanism is used to release gas inside the second battery cell, thereby ensuring the safety of the second battery cell.

[0032] However, as a result of research by the inventors of the present application, when a battery cell thermally fails, the failure reaction of the first battery cell is more serious than the failure reaction of the second battery cell, i.e., the high-temperature gas from the first battery cell is much hotter than the high-temperature gas from the second battery cell, so that the temperature of the first battery cell is more likely to rise, which will further cause a chain reaction, aggravate the thermal failure of the first battery cell, and cause battery safety issues.

[0033] In order to solve the problem that a first battery cell with a serious failure reaction can cause a chain reaction and cause battery safety problems, the present application provides a battery, an apparatus, a battery manufacturing method, and a battery manufacturing apparatus, in which a first pressure release mechanism is installed in the first battery cell and a second pressure release mechanism is installed in the second battery cell, and the area of ​​the first pressure release mechanism is limited to be larger than the area of ​​the second pressure release mechanism, so that even the first battery cell with high energy density can timely release its internal pressure through the first pressure release mechanism with a large area when the internal pressure or temperature reaches a threshold, thereby effectively mitigating the sudden temperature rise of the first battery cell, effectively reducing the chain reaction caused by the thermal failure of the first battery cell, and improving the safety of battery use.

[0034] Hereinafter, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the drawings of the embodiments of the present application, so as to make the above-mentioned objectives, features and advantages of the embodiments of the present application clear and easy to understand. It is obvious that the described embodiments are only some of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments of the present application, any other embodiments that a person skilled in the art can obtain without requiring creative labor are all within the scope of protection of the present application.

[0035] An embodiment of the present application provides an apparatus and a battery, the apparatus of the present application includes a battery, the battery is used for supplying electric energy, the apparatus of the present application is, for example, a mobile phone, a mobile device, a laptop, an electric bicycle, an electric car, a ship, a spacecraft, an electric toy, an electric tool, etc., the spacecraft is, for example, an airplane, a rocket, a space shuttle, a spaceship, etc., the electric toy is, for example, a fixed or movable electric toy, specifically, for example, a game console, an electric car toy, an electric boat toy, an electric airplane toy, etc., the electric tool is, for example, an electric metal cutting tool, an electric grinding tool, an electric assembly tool, an electric railway tool, specifically, for example, an electric drill, an electric grinder, an electric spanner, an electric screwdriver, an electric hammer, an electric assault drill, a concrete vibrator, and an electric planer.

[0036] Although the battery described in the present application is not limited to being applied to the power consuming devices described above, for convenience of explanation, the following embodiments will all be described taking an electric vehicle as an example.

[0037] FIG. 1 is a simplified schematic diagram of a vehicle 1 of this embodiment. The vehicle 1 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended range electric vehicle, etc. A battery 11 may be installed inside the vehicle 1, specifically, for example, the battery 11 may be installed at the bottom, head, or tail of the vehicle 1. The battery 11 can supply power to the vehicle 1, for example, the battery may function as an operating power source for the vehicle 1. The vehicle 1 may further include a controller 12 and a motor 13, and the controller 12, for example, controls the battery 11 to supply power to the motor 13. The battery 11 may be used for starting, navigation, etc. of the vehicle 1, and of course, the battery 11 may be used to drive the vehicle 1 to move forward, and provide driving power to the vehicle 1 by replacing or partially replacing natural gas.

[0038] The battery 11 according to this embodiment may be a battery module as shown in FIG. 2 or a battery pack as shown in FIG. 3, and the basic structural unit of the battery module and the battery pack is a battery cell, and a plurality of battery cells may be connected in series and / or in parallel together via electrode terminals and applied to various power consumption devices. The battery module is used to protect the battery cells from external impact, heat, vibration, and the like, and the battery module is obtained by electrically connecting a certain number of battery cells together and placing them in a frame. The battery pack is the final state of the battery system incorporated in the electric vehicle. Most conventional battery packs are obtained by arranging various control and protection systems such as a battery management system and a thermal management member in one or more battery modules. With the development of technology, the level of the battery module may be omitted, that is, the battery pack may be formed directly from the battery cells. With such improvements, the weight energy density and volume energy density of the battery system are improved and the number of parts is reduced.

[0039] As shown in Figures 2 to 6, the battery 11 of the present application includes a first battery cell 111 and a second battery cell 112, the energy density of the first battery cell 111 is greater than the energy density of the second battery cell 112, the first battery cell 111 includes a first pressure release mechanism 1111, the first pressure release mechanism 1111 is activated to release the internal pressure of the first battery cell 111 when the internal pressure or temperature of the first battery cell 111 reaches a threshold value, the second battery cell 112 includes a second pressure release mechanism 1121, the second pressure release mechanism 1121 is activated to release the internal pressure of the second battery cell 112 when the internal pressure or temperature of the second battery cell 112 reaches a threshold value, and the area of ​​the first pressure release mechanism 1111 is greater than the area of ​​the second pressure release mechanism 1121.

[0040] The first pressure release mechanism 1111 refers to an element or member that can be activated to release the internal pressure and / or internal material when the internal pressure or temperature of the first battery cell 111 reaches a predetermined threshold. The first pressure release mechanism 1111 may specifically use the form of, for example, an explosion-proof valve, an air valve, a pressure relief valve, a safety valve, etc., and may specifically use a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the first battery cell 111 reaches a predetermined threshold, the first pressure release mechanism 1111 executes a motion or a weak structure provided in the first pressure release mechanism 1111 is broken, thereby forming an opening or channel for releasing the internal pressure.

[0041] As can be understood, the second pressure release mechanism 1121 refers to an element or member that can be activated to release the internal pressure and / or internal material when the internal pressure or temperature of the second battery cell 112 reaches a predetermined threshold. The second pressure release mechanism 1121 may specifically use the form of, for example, an explosion-proof valve, an air valve, a pressure relief valve, or a safety valve, and may specifically use a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the second battery cell 112 reaches a predetermined threshold, the second pressure release mechanism 1121 executes a motion or a weak structure provided in the second pressure release mechanism 1121 is broken, thereby forming an opening or channel for releasing the internal pressure.

[0042] The threshold value described in the present application may be a pressure threshold value or a temperature threshold value, which is set according to design needs, for example, the threshold value may be designed or determined according to the internal pressure or internal temperature value of the first battery cell 111 at which a risk of danger or runaway is believed to exist, and the threshold value may be determined, for example, by the materials used for one or more of the positive plate, negative plate, electrolyte, and separator in the first battery cell 111, and for example, the threshold value may be designed or determined according to the internal pressure or internal temperature value of the second battery cell 112 at which a risk of danger or runaway is believed to exist, and the threshold value may be determined, for example, by the materials used for one or more of the positive plate, negative plate, electrolyte, and separator in the second battery cell 112.

[0043] The term "operation" referred to in the present application refers to the first pressure release mechanism 1111 performing a motion or being enabled until a certain state is reached, thereby enabling the internal pressure of the first battery cell 111 to be released, and the second pressure release mechanism 1121 performing a motion or being enabled until a certain state is reached, thereby enabling the internal pressure of the second battery cell 112 to be released. The motion caused by the first pressure release mechanism 1111 includes, but is not limited to, at least a part of the first pressure release mechanism 1111 bursting, breaking, tearing, opening, etc. When the first pressure release mechanism 1111 operates, high temperature and high pressure materials inside the first battery cell 111 are discharged from the operating portion to the outside as discharge. In this manner, the pressure of the first battery cell 111 can be released while controlling the pressure or temperature, thereby avoiding more serious potential accidents. Discharges from the first battery cell 111 referred to in the present application include, but are not limited to, electrolyte, dissolved or decomposed positive and negative electrode plates, separator fragments, high temperature and high pressure gas due to reaction, flames, etc. The high-temperature and high-pressure discharged material is discharged in the direction of the first pressure release mechanism 1111 of the first battery cell 111, specifically in the direction of the operating area of ​​the first pressure release mechanism 1111, and the force and destructive power of the discharged material may be very large, and in serious cases, may be enough to break through one or more components in that direction. Similarly, the motion caused by the second pressure release mechanism 1121 includes, but is not limited to, the rupture, breakage, tearing, opening, etc. of at least a part of the second pressure release mechanism 1121. When the second pressure release mechanism 1121 operates, the high-temperature and high-pressure material inside the second battery cell 112 is discharged as discharged material from the operating area to the outside. In this manner, the pressure of the second battery cell 112 can be released while controlling the pressure or temperature, thereby avoiding more serious potential accidents. The discharged material from the second battery cell 112 mentioned in this application includes, but is not limited to, electrolyte, dissolved or decomposed positive and negative electrode plates, separator fragments, high-temperature and high-pressure gas due to reaction, flames, etc.The high temperature and high pressure discharged material is discharged in the direction of the installation of the second pressure release mechanism 1121 of the second battery cell 112, specifically, in the direction of the operating area of ​​the second pressure release mechanism 1121, and the force and destructive power of such discharged material can be very large, and in severe cases, sufficient to pierce one or more components in that direction.

[0044] The first battery cell 111 and the second battery cell 112 of the present application may be a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, and the embodiments of the present application are not limited thereto. The first battery cell 111 and the second battery cell 112 may be a cylindrical body, a flat body, a rectangular body, or other shapes, and the embodiments of the present application are not limited thereto. The first battery cell 111 and the second battery cell 112 are generally divided into cylindrical battery cells, prismatic battery cells, and soft-pack battery cells according to the packaging method, and the embodiments of the present application are not limited thereto.

[0045] As shown in FIGS. 7 to 10, the first battery cell 111 typically includes an electrode assembly (not shown) and an electrolyte (not shown). The electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate. The first battery cell 111 is operated mainly by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The part of the collector where the positive electrode active material layer is not coated protrudes from the part where the positive electrode active material layer is coated, and the part of the collector where the positive electrode active material layer is not coated functions as a positive electrode tab. In the case of a lithium ion battery, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode collector, the part of the collector not coated with the negative electrode active material layer protrudes from the part coated with the negative electrode active material layer, and the part of the collector not coated with the negative electrode active material layer functions as a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicone, etc. In order not to melt even when a high current flows, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together. The material of the separator may be polypropylene (abbreviated as PP) or polyethylene (abbreviated as PE), etc. In addition, the electrode assembly may be a wound type structure or a stacked type structure, and the number of electrode assemblies may be one or more, and the embodiment of the present application is not particularly limited thereto. The first battery cell 111 further includes a case 1114, in which the electrode assembly and the electrolyte are both enclosed, and the case 1114 may be a hollow rectangle, cube or cylinder, and the material of the case 1114 may be aluminum or steel and its alloy, or may be a plastic material or aluminum-plastic film. A positive electrode terminal 1112 and a negative electrode terminal 1113 are further installed on the case 1114, and 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, so that electrical energy can be output.The case 1114 is further equipped with the above-mentioned first pressure release mechanism 1111, which may be installed at any position of the case 1114, for example, the first pressure release mechanism 1111 may be installed at the top, bottom or side of the case 1114, and the first pressure release mechanism 1111 may be installed between the positive electrode terminal 1112 and the negative electrode terminal 1113, and the present application is not particularly limited thereto as long as it is possible to discharge the internal pressure of the first battery cell 111.

[0046] As can be understood, the structure of the second battery cell 112 is the same as that of the first battery cell 111, so a detailed description thereof will be omitted here.

[0047] In some embodiments, the ratio of the energy density E1 of the first battery cell 111 to the energy density E2 of the second battery cell 112 satisfies 1.26≦E1 / E2≦2.14, where the energy density refers to the energy output by the battery per unit mass or unit volume, i.e., gravimetric energy density or volumetric energy density, and in some embodiments, the first battery cell 111 is, for example, a ternary lithium battery, specifically, for example, a lithium nickel-cobalt manganese oxide battery or a lithium nickel-cobalt aluminum oxide battery, and the second battery cell 112 is, for example, a lithium iron phosphate battery or a lithium cobalt oxide battery. However, the energy density of the first battery cell 111 is greater than that of the second battery cell 112, and the thermal failure reaction of the first battery cell 1115 is usually more serious than the failure reaction of the second battery cell 112. Therefore, installing the first battery cell 111 and the second battery cell 112 simultaneously is beneficial to reducing chain reactions caused by thermal failure, i.e., to slow down the spread of thermal diffusion, and further improve the safety of use of the battery 11.

[0048] In some embodiments, the ratio of the area A1 of the first pressure release mechanism 1111 to the area A2 of the second pressure release mechanism 1121 satisfies 1.5≦A1 / A2≦4, so that both the first battery cell 111 and the second battery cell 112 can release energy in a timely and effective manner, thereby improving the safety of battery use.

[0049] In the battery 11 provided by the embodiment of the present application, a first pressure release mechanism 1111 is provided in the first battery cell 111, so that the first battery cell 111 can release its internal pressure when the internal pressure or temperature of the first battery cell 111 reaches a threshold value; a second pressure release mechanism 1121 is provided in the second battery cell 112, so that the second battery cell 112 can also release its internal pressure when the internal pressure or temperature of the second battery cell 112 reaches a threshold value; and the energy density of the first battery cell 111 is greater than the energy density of the second battery cell 112. In other words, the failure reaction due to thermal failure of the first battery cell 111 is more serious than the failure reaction due to thermal failure of the second battery cell 112. By limiting the area of ​​the first pressure release mechanism 1111 to be larger than the area of ​​the second pressure release mechanism 1121, the first battery cell 111 with a more serious failure reaction can timely and effectively release pressure through the first pressure release mechanism 1111 with a larger area, which effectively reduces the probability of a chain reaction caused by the first battery cell 111 being unable to timely release internal pressure, and improves the use safety of the entire battery 11.

[0050] In the battery 11 of this embodiment, the first battery cells 111 and the second battery cells 112 are alternately arranged in an arrangement of n first battery cells 111 and m second battery cells 112, where n≧1, m≧1, and n and m are both integers.

[0051] Here, the values ​​of n and m may be the same or different. For example, in some embodiments, as shown in FIG. 2, FIG. 4, and FIG. 5, the values ​​of n and m are all 1, i.e., n=1, m=1, in this case, the first battery cells 111 and the second battery cells 112 are distributed in a row or a column with a gap therebetween, i.e., one second battery cell 112 is provided between two adjacent first battery cells 111, and one first battery cell 111 is provided between two adjacent second battery cells 112; for example, in some embodiments, as shown in FIG. 3, the values ​​of n and m are all 6, i.e., n=6, m=6, in this case, six first battery cells 111 and six second battery cells 112 constitute a distribution unit, and the number of distribution units is three, and the number of distribution units is three. 3, the six first battery cells 111 and the six second battery cells 112 of each distribution unit are distributed along the X direction shown in FIG. 3, and in two adjacent distribution units, the first battery unit 111 and the second battery cell 112 are distributed in a staggered manner; and, for example, in some other embodiments, as shown in FIG. 11, the value of n is 2 and the value of m is 2, that is, n=2, m=2, in this case, the first battery cells 111 and the second battery cells 112 are distributed in a row or a column with an interval of two, such as two first battery cells 111 and two second battery cells 112, that is, the distribution unit composed of two first battery cells 111 and two second battery cells 112 is repeatedly distributed in a row or a column. It can be understood that the value of n and the value of m may be other values, which are not listed here.

[0052] 11, in the battery 11 of the present application, in some embodiments, a first insulating member 114 is further provided between two adjacent first battery cells 111, and when one first battery cell 111 thermally fails, the first insulating member 114 can effectively prevent the thermally failed first battery cell 111 and the adjacent first battery cell 111 from thermally failing. In some embodiments, a second insulating member 115 is further provided between adjacent second battery cells 112, and when one second battery cell 112 thermally fails, the second insulating member 115 can effectively prevent the thermally failed second battery cell 112 and the adjacent second battery cell 112 from thermally failing. In some embodiments, a third insulating member 116 is further installed between the adjacent first battery cell 111 and the second battery cell 112, so that when one first battery cell 111 thermally fails, the third insulating member 116 can effectively prevent the second battery cell 112 adjacent to the thermally failed first battery cell 111 from thermally failing, and vice versa. In some embodiments, the battery 11 includes at least one of the first insulating member 114, the second insulating member 115, and the third insulating member 116. In some embodiments, the first insulating member 114, the second insulating member 115, and the third insulating member 116 can be at least one of foam, rubber, insulating cotton, and aerogel insulating pads. In some embodiments, the first insulating member 114, the second insulating member 115 and the third insulating member 116 may be configured as a square frame structure, and the first insulating member 114, the second insulating member 115 and the third insulating member 116 further include a filling member for filling the hollow portion of the square frame, and the filling member has elasticity and is at least one selected from foam, rubber, insulating cotton, and aerogel insulating pads.

[0053] The battery 11 of the embodiment of the present application further includes a discharge channel 117, which is disposed opposite the first pressure release mechanism 1111 and / or the second pressure release mechanism 1121, and is configured to collect discharge from the first battery cell 111 when the first pressure release mechanism 1111 is activated, and / or to collect discharge from the second battery cell 112 when the second pressure release mechanism 1121 is activated. By providing the discharge channel, the internal pressure of the first battery cell 111 and the second battery cell 112 can be timely released when the internal pressure and temperature of the first battery cell 111 and the second battery cell 112 reach a threshold value, and the use safety of the battery 11 is further improved.

[0054] In some embodiments, the exhaust channel 117 is located opposite the first pressure release mechanism 1111 and is configured to collect exhaust from the first battery cell 111 when the first pressure release mechanism 1111 is activated, and in some embodiments, the exhaust channel 117 is located opposite the second pressure release mechanism 1121 and is configured to collect exhaust from the second battery cell 112 when the second pressure release mechanism 1121 is activated. In some other embodiments, as shown in Figures 4 and 5, the exhaust channel 117 is located opposite both the first pressure release mechanism 1111 of the first battery cell 111 and the second pressure release mechanism 1121 of the second battery cell 112, and the exhaust channel 117 is configured to collect exhaust from the first battery cell 111 and the second battery cell 112 when the first pressure release mechanism 1111 and the second pressure release mechanism 1121 are activated, so that the first pressure release mechanism 1111 of the first battery cell 111 is located in a central position as shown in Figure 13a, and similarly, the second pressure release mechanism 1121 of the second battery cell 112 is also located in a central position.

[0055] In the embodiment shown in FIG. 12, at least two exhaust channels 117 are provided, each exhaust channel 117 is provided separately from each other, and the first pressure release mechanism 1111 and the second pressure release mechanism 1121 are respectively provided opposite different exhaust channels 117. For example, the first battery cell 111 and the second battery cell 112 are distributed in a row, the length and width of the first battery cell 111 and the second battery cell 112 may be approximately the same, the thickness may be the same or different, and the distance between the first pressure release mechanism 1111 of the first battery cell 111 and its side is a quarter of the width of the first battery cell 111, the distance between the second pressure release mechanism 1121 of the second battery cell 112 and its side is a quarter of the width of the second battery cell 112, and the first pressure release mechanism The first pressure release mechanism 1111 and the second pressure release mechanism 1121 are not installed on the same line, i.e., the first pressure release mechanism 1111 of the first battery cell 111 and the second pressure release mechanism 1121 of the second battery cell 112 are installed in a staggered manner in the distribution direction of the first battery cell 111 and the second battery cell 112. Thus, when the internal pressure or temperature of the first battery cell 111 reaches a threshold, the waste material inside the first battery cell 111 is discharged from one of the discharge channels 117, and when the internal pressure or temperature of the second battery cell 112 reaches a threshold, the waste material inside the second battery cell 112 is discharged from one of the discharge channels 117. In this way, the waste material from both the first battery cell 111 and the second battery cell 112 can be discharged to the outside of the battery 11 in a timely and effective manner, thereby improving the safety of the battery 11.

[0056] Of course, in an alternative embodiment of the above embodiment, as shown in Figures 13a and 13b, the distance between the first pressure release mechanism 1111 of the first battery cell 111 and its side edge may be half the width of the first battery cell 111, and the distance between the second pressure release mechanism 1121 of the second battery cell 112 and its side edge may be a quarter of the width of the second battery cell 112, in which case the first pressure release mechanism 1111 of the first battery cell 111 and the second pressure release mechanism 1121 of the second battery cell 112 are also not installed on the same line, that is, the first pressure release mechanism 1111 of the first battery cell 111 and the second pressure release mechanism 1121 on the second battery cell 112 are installed in a staggered manner in the distribution direction of the first battery cell 111 and the second battery cell 112.

[0057] In some embodiments, at least two first battery cells 111 are installed, and the first pressure release mechanisms 1111 of two adjacent first battery cells 111 are respectively installed facing different exhaust channels 117, so that different first battery cells 111 can discharge exhaust through different exhaust channels 117, thereby enabling the exhaust of the first battery cells 111 to be discharged outside the battery 11 in a timely and effective manner, and effectively reducing the thermal failure of the second battery cell 112 caused by the thermal failure of the first battery cell 111, further slowing down the chain reaction, and improving the safety of use of the battery 11.

[0058] In some other embodiments, at least two second battery cells 112 are installed, and the second pressure release mechanisms 1121 of two adjacent second battery cells 112 are respectively installed facing different exhaust channels 117, so that different second battery cells 112 can respectively exhaust exhaust through different exhaust channels 117, thereby enabling the exhaust of the second battery cells 112 to be timely and effectively discharged to the outside of the battery 11, and can effectively reduce the thermal failure of the first battery cell 111 caused by the thermal failure of the second battery cell 112, further slowing down the chain reaction, and improving the safety of use of the battery 11.

[0059] In some embodiments, as shown in FIG. 5 and FIG. 14, the battery 11 further includes a housing 113, the housing 113 has a plurality of walls, the plurality of walls are used to define a receiving cavity for receiving the first battery cell 111 and the second battery cell 112, and at least one of the plurality of walls has a hollow chamber serving as the discharge channel 117. The housing 113 may be sealed or not. Specifically, for example, the housing 113 includes a top wall (not shown) located at the top, a bottom wall 1131 located at the bottom, and a side wall 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 together with the side wall 1132, the receiving cavity is formed. Of course, the side wall 1132 may be four sub-side walls connected end to end, or may be an integral member. The housing 113 is used to protect the first battery cell 111 and the second battery cell 112 arranged in the accommodating cavity, and a hollow chamber forming an exhaust channel 117 is provided in at least one of the walls of the housing 113, which facilitates the first pressure release mechanism 1111 of the first battery cell 111 and the second pressure release mechanism 1121 of the second battery cell 112 to be installed opposite the corresponding hollow chamber, so that when the internal pressure or temperature of the first battery cell 111 reaches a threshold, the exhaust of the first battery cell 111 can be exhausted into the hollow chamber, and when the internal pressure or temperature of the second battery cell 112 reaches a threshold, the exhaust of the second battery cell 112 can be exhausted into the hollow chamber, which effectively reduces the risk of combustion or explosion and improves the use safety of the battery 11.

[0060] Furthermore, the bottom wall 1131 is used to support the first battery cell 111 and the second battery cell 112, and the bottom wall 1131 has a hollow chamber. In this case, the first pressure release mechanism 1111 of the first battery cell 111 and the second pressure release mechanism 1121 of the second battery cell 112 are both installed at the bottom of their respective cases 1114. Thus, waste from the first battery cell 111 is discharged downward and passes through the first pressure release mechanism 1111 into the hollow chamber at the bottom, and waste from the second battery cell 112 is discharged downward and passes through the second pressure release mechanism 1121 into the hollow chamber at the bottom. Due to this arrangement of the battery 11, when the battery 11 is placed in the battery storage section 11 of the vehicle 1, waste is discharged to the bottom of the vehicle 1 instead of the passenger compartment located above the battery storage section 11, and thus the safety of the battery 11 is further improved.

[0061] In some embodiments, in order to facilitate the timely and effective discharge of the exhaust from the first battery cell 111 and the second battery cell 112 to the exhaust channel 117, the first pressure release mechanism 1111 of the first battery cell 111 and the second pressure release mechanism 1121 of the second battery cell 112 are configured to communicate with the corresponding exhaust channel 117. The manner of communication between the first pressure release mechanism 1111 of the first battery cell 111 and the hollow chamber in which the exhaust channel 117 of the casing 113 is formed, and the manner of communication between the second pressure release mechanism 1121 of the second battery cell 112 and the hollow chamber in which the exhaust channel 117 of the casing 113 is formed will be described with reference to the following two embodiments, but the following two embodiments are merely illustrative of two possible embodiments and do not limit the manner of communication between the first pressure release mechanism 1111 of the first battery cell 111 and the hollow chamber, and the manner of communication between the second pressure release mechanism 1121 of the second battery cell 112 and the hollow chamber.

[0062] In one embodiment, at least one wall of the housing 113 of the battery 11 is configured to be broken when the first pressure release mechanism 1111 is activated so that the discharge from the first battery cell 111 penetrates the at least one wall and enters the discharge channel 117. In other words, a hollow chamber is provided in at least one wall of the housing 113, which may be the top wall, the bottom wall 1131 or the side wall 1132, and the part of the housing 113 facing the first pressure release mechanism 1111 of the first battery cell 111 has a complete wall surface at the first pressure release mechanism 1111, i.e., the part of the housing 113 facing the first pressure release mechanism 1111 of the first battery cell 111 does not have a hole structure communicating with the hollow chamber when the first pressure release mechanism 1111 is not activated. However, when the internal pressure or temperature of the first battery cell 111 reaches a threshold value, when the first pressure release mechanism 1111 of the first battery cell 111 is activated and the waste material inside the first battery cell 111 is discharged, the waste material discharged by the first battery cell 111 acts on at least one wall of the housing 113, thereby destroying (breaking or bursting) the part of the housing 113 facing the pressure release mechanism of the first battery cell 111, and the inside of the hollow chamber of the housing 113 communicates with the first pressure release mechanism 1111, thus realizing the timely and effective discharge of the waste material inside the first battery cell 111 to the discharge channel 117. Similarly, at least one wall of the housing 113 of the battery 11 is configured to be ruptured when the second pressure release mechanism 1121 is activated so that exhaust from the second battery cell 112 penetrates the at least one wall and enters the exhaust channel 117, and the communication method between the second pressure release mechanism 1121 of the second battery cell 112 and the hollow channel is the same as the communication method between the first pressure release mechanism 1111 of the first battery cell 111 and the hollow channel, so detailed description is omitted here.

[0063] In another embodiment, at least one wall of the housing 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, and the first through hole 1133 is configured to communicate with the exhaust channel 117 so that when the first pressure release mechanism 1111 is activated, the exhaust from the first battery cell 111 enters the exhaust channel 117 through the first through hole 1133. When the internal pressure or temperature of the first battery cell 111 reaches a threshold value, when the pressure release mechanism of the first battery cell 111 is activated and the exhaust inside the first battery cell 111 is discharged, the exhaust discharged from the first battery cell 111 enters the inside of the hollow chamber of the housing 113 through the first through hole 1133, thereby realizing that the exhaust inside the first battery cell 111 is discharged to the exhaust channel 117 in a timely and effective manner. Similarly, at least one wall of the housing 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, and the first through hole 1133 is configured to communicate with the exhaust channel 117 so that when the second pressure release mechanism 1121 is activated, the exhaust from the second battery cell enters the exhaust channel 117 through the first through hole 1133, and the communication method between the second pressure release mechanism 1121 of the second battery cell 112 and the hollow channel is the same as the communication method between the first pressure release mechanism 1111 of the first battery cell 111 and the hollow channel, so a detailed description will be omitted here.

[0064] The battery 11 further includes a thermal management member 118 for receiving a fluid and adjusting the temperature of the first battery cell 111 and the second battery cell 112, the thermal management member 118 being disposed between the first battery cell 111 and the second battery cell 112 and at least one wall, and by disposing the thermal management member 118, the temperature of the first battery cell 111 and the second battery cell 112 can be adjusted, and the first battery cell 111 and the second battery cell 112 can be charged and discharged more efficiently and safely. The fluid here may be a liquid or a gas, and adjusting the temperature refers to heating or cooling the first battery cell 111 and the second battery cell 112. When cooling or lowering the temperature of the first battery cell 111 and the second battery cell 112, the thermal management member 118 is used to contain a cooling fluid to lower the temperature of the first battery cell 111 and the second battery cell 112. In this case, the thermal management member 118 is also called a cooling member, a cooling system, a cooling plate, etc., and the fluid contained therein is also called a cooling medium or a cooling fluid, specifically, a coolant or a cooling gas. The thermal management member 118 can also be used to contain a heating fluid to heat the battery cell 111, but the embodiment of the present application is not limited thereto. Optionally, the fluid may be circulated to achieve a higher temperature adjustment effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, air, etc.

[0065] Here, the thermal management member 118 is configured to be destroyed (broken or burst) when the first pressure release mechanism 1111 and / or the second pressure release mechanism 1121 are activated so that the fluid can flow out. That is, when the internal pressure or temperature of the first battery cell 111 and the second battery cell 112 reaches a threshold value and it is necessary to discharge high-temperature and high-pressure gas, the thermal management member 118 is acted on and destroyed by the exhaust discharged from the first battery cell 111 and the second battery cell 112, and the exhaust from the first battery cell 111 and the second battery cell 112 can enter the exhaust channel 117 (i.e., the hollow chamber of the housing 113) through the destroyed thermal management member 118. Furthermore, the destruction of the thermal management member 118 allows the leaked fluid, such as a coolant, to absorb a large amount of heat and gasify, thereby enabling the temperature inside the battery 11 to be quickly reduced, which is advantageous in mitigating a chain reaction caused by a thermal failure and improving the safety of the battery 11.

[0066] Exemplarily, as shown in Figures 5 and 14, the thermal management member 118 is, for example, a water-cooled plate, in which a fluid channel is installed, a water inlet is formed at one end of the fluid channel, and a water outlet is formed at the other end of the fluid channel. When the first battery cell 111 and the second battery cell 112 are operating normally, the water temperature in the water-cooled plate is adjusted to adjust the ambient temperature of the first battery cell 111 and the second battery cell 112, and the first battery cell 111 and the second battery cell 112 are charged and discharged within a reasonable temperature range, thereby improving the charging efficiency and discharging efficiency of the battery 11. When the first battery cell 111 thermally fails, or the second battery cell 112 thermally fails, or both the first battery cell 111 and the second battery cell 112 thermally fail, the water-cooled plate is damaged by the internal pressure released by the first battery cell 111 and the second battery cell 112, the water inside the water-cooled plate vaporizes, and the heat of the high-temperature gas released by the first battery cell 111 and the second battery cell 112 is absorbed, thereby further reducing the probability of combustion or explosion of the first battery cell 111 and the second battery cell 112 and improving the safety of use of the battery 11. Optionally, the thermal management member 118 is provided with a second through hole 1181 configured to communicate with the exhaust channel 117 such that exhaust from the first battery cell 111 and / or the second battery cell 112 enters the corresponding exhaust channel 117 through the second through hole 1181 when the first pressure release mechanism 1111 and / or the second pressure release mechanism 1121 are activated. Optionally, the second through hole 1181 may be configured to be equal to or larger than the area of ​​the first pressure release mechanism 1111 disposed on the first battery cell 111 and / or equal to or larger than the area of ​​the second pressure release mechanism 1121 disposed on the second battery cell 112. As a result, when the internal pressure or temperature of the first battery cell 111 reaches a threshold value, the first pressure release mechanism 1111 of the first battery cell 111 is activated and the waste material inside the first battery cell 111 is discharged, the waste material discharged from the first battery cell 111 can quickly and smoothly enter the exhaust channel 117 (i.e., the hollow chamber of the housing 113) through the second through hole 1181, thereby enabling the waste material inside the first battery cell 111 to be discharged to the exhaust channel 117 in a timely and effective manner.Similarly, when the internal pressure or temperature of the second battery cell 112 reaches a threshold value, the second pressure release mechanism 1121 of the second battery cell 112 is activated and the waste material inside the second battery cell 112 is discharged, the waste material discharged from the second battery cell 112 can quickly and smoothly enter the exhaust channel 117 (i.e., the hollow chamber of the housing 113) through the second through hole 1171, thereby realizing that the waste material inside the second battery cell 112 is discharged to the exhaust channel 117 in a timely and effective manner. Furthermore, when a first through hole 1133 is provided in at least one wall of the housing 113 and the first through hole 1133 is configured to communicate with the exhaust channel 117, the second through hole 1181 communicates with the exhaust channel 117 via the first through hole 1133, and the exhaust discharged from the first battery cell 111 and / or the second battery cell 112 sequentially enters the exhaust channel 117 (i.e., the hollow chamber of the housing 113) via the second through hole 1181 and the first through hole 1133, thereby realizing that the exhaust inside the first battery cell 111 and the second battery cell 112 is discharged to the exhaust channel 117 in a timely and effective manner. However, in the above embodiment, the second through holes 1181 must correspond one-to-one to the first through holes 1133, and for example, two exhaust channels 117 are provided in the bottom wall 1131 of FIG. 15, and a plurality of first through holes 1133 communicating with the two exhaust channels 117 are provided in the bottom wall 1131 of FIG. 16. In such a case, a plurality of second through holes 1181 corresponding one-to-one to the first through holes 1133 are provided in the heat management member 118 of FIG. 17. For example, one exhaust channel 117 is provided in the bottom wall 1131 of FIG. 18, and a plurality of first through holes 1133 communicating with the one exhaust channel 117 are provided in the bottom wall 1131 of FIG. 19. In such a case, a plurality of second through holes 1181 corresponding one-to-one to the first through holes 1133 are provided in the heat management member 118 of FIG. 20.

[0067] The battery 11 according to the embodiment of the present application has been described above with reference to Figures 1 to 20. Below, a manufacturing method and device for the battery 11 according to the embodiment of the present application will be described. For parts that are not described in detail here, please refer to the above-mentioned embodiments.

[0068] In this embodiment, disposing a first battery cell 111, the first battery cell 111 including a first pressure release mechanism 1111, the first pressure release mechanism 1111 being adapted to be activated to release the internal pressure of the first battery cell 111 when the internal pressure or temperature of the first battery cell 111 reaches a threshold; disposing a second battery cell 112, the second battery cell 112 including a second pressure release mechanism 1121, the second pressure release mechanism 1121 being adapted to be activated to release the internal pressure of the second battery cell 112 when the internal pressure or temperature of the second battery cell 112 reaches a threshold; A method for manufacturing a battery is provided, in which the energy density of the first battery cell is greater than the energy density of the second battery cell, and the area of ​​the first pressure release mechanism is greater than the area of ​​the second pressure release mechanism.

[0069] In the battery manufacturing method according to the present embodiment, a first battery cell 111 having a high energy density and a second battery cell 112 having a low energy density are arranged, and the area of ​​the first pressure release mechanism 1111 of the arranged first battery cell 111 is limited to be larger than the area of ​​the second pressure release mechanism 1121 of the second battery cell 112. Therefore, when the first battery cell 111 and the second battery cell 112 are thermally broken, even if the failure reaction of the thermal failure of the first battery cell 111 is more serious than the failure reaction of the thermal failure of the second battery cell 112, the first battery cell 111 having the more serious failure reaction can timely and effectively release pressure through the first pressure release mechanism 1111 having a larger area, and the second battery cell 112 can timely and effectively release pressure through the second pressure release mechanism 1121. In this way, a rapid temperature rise of the first battery cell 111 is effectively alleviated, and the probability of a chain reaction caused by a thermal failure of the first battery cell 111 is effectively reduced, thereby improving the safety of the entire battery 11.

[0070] An embodiment of the present application includes a first battery cell arrangement module and a second battery cell arrangement module, The first battery cell arrangement module is used for arranging a first battery cell 111, and the first battery cell 111 includes a first pressure release mechanism 1111, and the first pressure release mechanism 1111 is used for releasing the internal pressure of the first battery cell 111 when the internal pressure or temperature of the first battery cell 111 reaches a threshold value; The second battery cell arrangement module is used for arranging a second battery cell 112, and the second battery cell 112 includes a second pressure release mechanism 1121, and the second pressure release mechanism 1121 is used for releasing the internal pressure of the second battery cell 112 when the internal pressure or temperature of the second battery cell 112 reaches a threshold value; The energy density of the first battery cell (111) is greater than the energy density of the second battery cell (112), and the area of ​​the first pressure release mechanism (1111) is greater than the area of ​​the second pressure release mechanism (1121).

[0071] In the battery manufacturing apparatus according to the present embodiment, a first battery cell 111 having a high energy density is arranged by a first battery cell arrangement module, and a second battery cell 112 having a low energy density is arranged by a second battery cell arrangement module. In addition, the area of ​​the first pressure release mechanism 1111 of the arranged first battery cell 111 is limited to be larger than the area of ​​the second pressure release mechanism 1121 of the second battery cell 112. Therefore, when the first battery cell 111 and the second battery cell 112 are thermally broken, the failure reaction of the thermal failure of the first battery cell 111 is limited to the area of ​​the second battery cell 112. Even if the failure reaction of the first battery cell 111 with a more serious failure reaction is more serious than the failure reaction of the thermal failure of the first battery cell 112, the first battery cell 111 with a more serious failure reaction can timely and effectively release pressure through the first pressure release mechanism 1111 with a larger area, and the second battery cell 112 can timely and effectively release pressure through the second pressure release mechanism 1121, thereby effectively mitigating the sudden temperature rise of the first battery cell 111, and further effectively reducing the probability of a chain reaction caused by the thermal failure of the first battery cell 111, and improving the safety of use of the entire battery 11.

[0072] The battery manufacturing apparatus of this embodiment may be applied to the battery manufacturing method of the above embodiment, i.e., the battery manufacturing method of the above embodiment can be specifically carried out using the battery manufacturing apparatus of this embodiment.

[0073] As described above, in the battery 11, device, battery manufacturing method, and battery manufacturing device of the present application, the area of ​​the first pressure release mechanism 1111 of the first battery cell 111 having a high energy density is limited to be larger than the area of ​​the second pressure release mechanism 1121 of the second battery cell 112 having a low energy density, thereby enabling both the first battery cell 111 and the second battery cell 112 to release pressure in a timely and effective manner, improving the safety of use of the entire battery 11.

[0074] Each example or embodiment in this specification will be described step by step, and the differences between each example and other examples will be described as the focus, and the same or similar parts between each example may be referred to each other.

[0075] In the description herein, the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "examples," or "some examples" mean that a particular feature, structure, material, or characteristic described with reference to an embodiment or example is included in at least one embodiment or example of the present application. In the present specification, exemplary references to such terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0076] It should be noted that the above embodiments are merely for illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may modify the technical solutions described in the above embodiments, or replace part or all of the technical features with equivalents, and such modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application. [Explanation of symbols]

[0077] 1-Vehicle 11-Battery 111-1st battery cell 1111-First pressure release mechanism 1112-Positive electrode terminal 1113-Negative electrode terminal 1114-Case 112-2nd battery cell 1121-Second pressure release mechanism 113-Case 1131-Bottom wall 1132-side wall 1133-First Through Hole 114-First insulation member 115-Second insulation member 116-Third insulation member 117-Discharge Channel 118-Heat management components 1181-Second Through Hole 12-Controller 13-Motor

Claims

1. A battery, A battery pack includes a plurality of battery cells and a discharge channel; The plurality of battery cells includes a first battery cell and a second battery cell arranged along a first direction, The first battery cell includes a first pressure release mechanism, and the first pressure release mechanism is activated to release the internal pressure of the first battery cell when an internal pressure or a temperature of the first battery cell reaches a threshold value; the second battery cell includes a second pressure release mechanism, the second pressure release mechanism being activated to release the internal pressure of the second battery cell when an internal pressure or a temperature of the second battery cell reaches a threshold; an energy density of the first battery cell is greater than an energy density of the second battery cell, and an area of ​​the first pressure release mechanism is greater than an area of ​​the second pressure release mechanism; The first pressure release mechanism and the second pressure release mechanism are disposed offset from each other along the first direction, The exhaust channel is disposed opposite the first pressure release mechanism and / or the second pressure release mechanism, and the exhaust channel is and / or collecting exhaust from the first battery cell when the first pressure release mechanism is activated. the second pressure release mechanism is configured to collect exhaust from the second battery cell when the second pressure release mechanism is activated; The battery has at least two discharge channels, each of the discharge channels is isolated from the other, and the first pressure release mechanism and the second pressure release mechanism are respectively disposed opposite different discharge channels.

2. Area A of the first pressure release mechanism １ and the area A of the second pressure release mechanism ２ The ratio of A to １ / A ２ ≦4.

3. The energy density E of the first battery cell １ and the energy density E of the second battery cell ２ The ratio of E １ / E ２ The battery according to claim 1 or 2, which satisfies ≦2.

14.

4. The battery according to any one of claims 1 to 3, wherein 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≧, m≧1.

5. At least two of the first battery cells are provided, and the first pressure release mechanisms of two adjacent first battery cells are provided facing different exhaust channels; and / or The battery according to any one of claims 1 to 4, wherein at least two of the second battery cells are installed, and the second pressure release mechanisms of two adjacent second battery cells are installed facing different discharge channels.

6. The battery of any one of claims 1 to 5, further comprising a housing, the housing having a plurality of walls, the plurality of walls being used to define a receiving cavity for receiving the first battery cell and the second battery cell, and at least one of the plurality of walls having a hollow chamber for forming the discharge channel.

7. The battery of claim 6 , wherein the walls are adapted to support the first and second battery cells and include a bottom wall having the hollow chamber.

8. 8. The battery of claim 6 or 7, wherein at least one of the walls is configured to break when the first pressure release mechanism and / or the second pressure release mechanism is activated such that exhaust from the first battery cell and / or the second battery cell passes through the at least one wall and into the corresponding exhaust channel.

9. 8. The battery of claim 6 or 7, wherein at least one of the walls is provided with a first through hole, the first through hole being configured to communicate with the exhaust channel such that exhaust from the first battery cell and / or the second battery cell enters the corresponding exhaust channel through the first through hole when the first battery cell and / or the second battery cell is activated.

10. 10. The battery of claim 6, further comprising a thermal management member for containing a fluid and regulating a temperature of the first and second battery cells, the thermal management member being disposed between the first and second battery cells and at least one of the walls, the thermal management member being configured to break when the first pressure release mechanism and / or the second pressure release mechanism is activated to allow the fluid to flow out.

11. 11. The battery of claim 10, wherein the thermal management member is provided with a second through hole configured to communicate with the exhaust channel such that exhaust from the first battery cell and / or the second battery cell enters the corresponding exhaust channel through the second through hole when the first pressure release mechanism and / or the second pressure release mechanism is activated.

12. The battery of claim 11 , wherein the second through-hole communicates with the exhaust channel through the first through-hole.

13. A device comprising a battery according to any one of claims 1 to 12, said battery being adapted to supply electrical energy.

14. A step of arranging a plurality of battery cells including a first battery cell and a second battery cell arranged along a first direction, The first battery cell includes a first pressure release mechanism, and the first pressure release mechanism is adapted to be activated to release the internal pressure of the first battery cell when an internal pressure or a temperature of the first battery cell reaches a threshold value; the second battery cell includes a second pressure release mechanism, the second pressure release mechanism being adapted to be activated to release the internal pressure of the second battery cell when an internal pressure or temperature of the second battery cell reaches a threshold; and Arranging an exhaust channel opposite the first pressure release mechanism and / or the second pressure release mechanism, and the exhaust channel collecting exhaust from the first battery cell when the first pressure release mechanism is activated; and / or and configured to collect exhaust from the second battery cell when the second pressure release mechanism is activated; an energy density of the first battery cell is greater than an energy density of the second battery cell, and an area of ​​the first pressure release mechanism is greater than an area of ​​the second pressure release mechanism; The first pressure release mechanism and the second pressure release mechanism are disposed offset from each other along the first direction, A method for manufacturing a battery, wherein at least two discharge channels are provided, each of the discharge channels is provided separately from the other, and the first pressure release mechanism and the second pressure release mechanism are provided opposite different discharge channels.

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