Batteries, power consumption devices, battery manufacturing methods and devices

Abstract

A battery, a power consuming device, a battery manufacturing method, and a device with improved safety are provided. [Solution] The battery includes a battery cell (20) including a pressure reducing mechanism (213), the pressure reducing mechanism being provided on a first wall (215) of the battery cell and being activated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold; an assembly member (13), the assembly member having a first surface (13a) assembled to the first wall and having a first through hole (101) corresponding to the position of the pressure reducing mechanism and through which waste from the battery cell passes when the pressure reducing mechanism is activated; and an insulating member (14), at least a portion of which is attached to the inner wall (13b) of the first through hole to insulate and protect the inner wall (13b) of the first through hole. The above technical solution can improve the safety of the battery.

Description

[Technical Field]

[0001] This application relates to the technical field of batteries, and in particular to batteries, power consuming devices, battery manufacturing methods and devices. [Background technology]

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles have become an important component of the sustainable development of the automotive industry due to their advantages of energy saving and environmental friendliness. For electric vehicles, battery technology is a key factor in their development.

[0003] In the development of battery technology, in addition to improving the electrochemical performance of batteries, safety issues have also become an issue that cannot be ignored. If battery safety issues cannot be guaranteed, the battery will become unusable. Therefore, how to improve battery safety has become a technical issue that needs to be resolved as soon as possible in battery technology. Summary of the Invention

[0004] The present application provides a battery, a power consuming device, a battery manufacturing method, and a device that can improve the safety of the battery.

[0005] In a first aspect, there is provided a battery including: a battery cell including a pressure reduction mechanism, the pressure reduction mechanism being provided on a first wall of the battery cell and being activated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold; an assembly member, the first surface of which is assembled to the first wall and having a first through hole corresponding to the position of the pressure reduction mechanism, through which waste from the battery cell passes through the assembly member when the pressure reduction mechanism is activated; and an insulating member, at least a portion of which is attached to the inner wall of the first through hole to insulate and protect the inner wall of the first through hole.

[0006] According to the technical solution of the embodiment of the present application, a first through hole is provided in the assembly member, and at least a portion of the insulating member is attached to the inner wall of the first through hole. This provides insulation protection for the inner wall of the first through hole, improving the insulation of the assembly member and preventing a short circuit caused by direct contact between the battery cell and the inner wall of the first through hole. This reduces safety risks and improves battery safety. Furthermore, the first surface of the assembly member is attached to a first wall provided with a pressure reduction mechanism. When the pressure reduction mechanism is activated, waste from the battery cell is discharged into the first through hole. The waste passes through the assembly member via the first through hole and is quickly discharged away from the battery cell, reducing the risk and improving battery safety.

[0007] In some possible embodiments, the insulating member has a first groove, the side wall of the first groove is fitted into the first through hole, and the outer edge of the first groove is assembled to the first surface.

[0008] In this way, in the actual installation process, the insulating member provided with the first groove can be directly fitted into the first through hole provided in the assembly member, not only covering the inner wall of the first through hole and providing insulating protection for the inner wall of the first through hole, but also easily and stably fixing the insulating member to the assembly member, thereby improving the assembly efficiency of the battery.

[0009] In some possible embodiments, a second through-hole is provided in the bottom wall of the first groove to allow waste from the battery cell to pass through the insulating member when the pressure reducing mechanism is activated.

[0010] Therefore, when the pressure reduction mechanism is activated, the waste from the battery cell is quickly discharged away from the battery cell through the second through-hole, reducing the risk and improving the safety of the battery.

[0011] In some possible embodiments, the bottom wall of the first groove is used to block the first through hole, and the bottom wall of the first groove is positioned so that it can be broken by the exhaust when the pressure reducing mechanism is activated, so that the exhaust passes through the insulating member.

[0012] In this way, when the pressure-reducing mechanism is not operating, the bottom wall of the first groove can close the first through-hole to prevent foreign matter from entering the space where the pressure-reducing mechanism is located and affecting the pressure-reducing performance of the pressure-reducing mechanism.When the pressure-reducing mechanism is operating, the bottom wall of the first groove is easily damaged by the exhaust so that the exhaust can smoothly pass through the insulating member and be discharged to the outside of the battery cell.

[0013] In some possible embodiments, a weakened area is provided in the bottom wall of the first groove, and the weakened area is positioned so that it can be broken by the waste material when the pressure reducing mechanism is activated, so that the waste material passes through the weakened area.

[0014] By providing the weakened area, the bottom wall of the first groove is more easily broken by the discharged matter of the battery cell, which helps to quickly depressurize the battery cell.

[0015] In some possible embodiments, the weakened area satisfies at least one of the following: the melting point of the weakened area is lower than that of other portions of the insulating member; the thickness of the weakened area is smaller than that of other portions of the insulating member; and a notch is provided in the weakened area.

[0016] The weakened area can be configured in various ways to be more susceptible to destruction by the waste material, so that when the pressure reducing mechanism is activated, the weakened area is more susceptible to destruction by the waste material than other portions of the bottom wall of the first groove.

[0017] In some possible embodiments, the assembly member is arranged to be assembled to the first wall by adhesive, and the insulating member is arranged to prevent the adhesive from being applied between the assembly member and the pressure reducing mechanism.

[0018] The insulating member can not only insulate and protect the inner wall of the first through hole provided in the assembly member, but also effectively prevent an adhesive from being applied between the assembly member and the pressure reduction mechanism during the battery manufacturing process, thereby blocking or affecting the operating performance of the pressure reduction mechanism.

[0019] In some possible embodiments, the pressure reducing mechanism has an operating area, the pressure reducing mechanism is arranged to form a release passage in the operating area for releasing the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold, and an outer edge of the first groove is arranged to surround at least the operating area to prevent the adhesive from entering the operating area.

[0020] The outer edge of the first groove surrounds at least the operating area, preventing adhesive from flowing into the operating area from any direction and interfering with or adversely affecting the operation of the pressure-reducing mechanism. This more reliably prevents adhesive from interfering with the normal operation of the pressure-reducing mechanism and also prevents adhesive from flowing in and blocking the discharge passage, which further blocks the discharge of waste materials released from the battery cells. This further improves the safety performance of the battery.

[0021] In some possible embodiments, the outer edge of the first groove is provided with a protrusion that protrudes from the first surface and is arranged to surround the pressure reduction mechanism, preventing the adhesive from being applied between the assembly member and the pressure reduction mechanism.

[0022] This arrangement makes it possible to simply and effectively prevent adhesive from being applied to the surface of the pressure reducing mechanism during the battery manufacturing process, thereby preventing interference with the operation of the pressure reducing mechanism.

[0023] In some possible embodiments, the protrusion includes a flange structure formed by bending the outer edge of the first groove.

[0024] Providing the edge of the insulating member with a flange structure not only facilitates processing and forming of the insulating member, but also simply and effectively prevents adhesive from being applied to the surface of the pressure reducing mechanism during the battery manufacturing process.

[0025] In some possible embodiments, the maximum height from the protrusion to the first surface is equal to or greater than a predetermined application height of the adhesive, and the battery cell is arranged to be compressed to match the height of the adhesive when assembled to the assembly member.

[0026] This arrangement ensures that the protrusions can effectively prevent adhesive from being applied between the assembly member and the pressure reducing mechanism, and the insulating member does not affect the reliable adhesion between the assembly member and the pressure reducing mechanism and the operation of the pressure reducing mechanism.

[0027] In some possible embodiments, the assembly member has a second groove disposed opposite the pressure reducing mechanism, the first through hole is provided in a bottom wall of the second groove, an outer edge of the first groove includes a first assembly wall connected to a side wall of the first groove, and the first assembly wall is assembled to the bottom wall of the second groove.

[0028] In the embodiment of the present application, a second groove is provided in the mounting member opposite the pressure reducing mechanism, which provides a buffer space for the discharged material from the battery cell, reduces the impact pressure on the external structure or components caused by the discharged material from the battery cell, and further improves the safety performance of the battery.

[0029] In some possible embodiments, the assembly member includes a first heat conduction plate and a second heat conduction plate, the first heat conduction plate is located between the first wall and the second heat conduction plate and assembled to the first wall, a first region of the first heat conduction plate is recessed into the second heat conduction plate to form the second groove, the first region is connected to the second heat conduction plate, the first through-hole is provided in the first region, an outer edge of the first groove further includes a second assembly wall and a connecting wall, the second assembly wall is connected to the first assembly wall via the connecting wall, the first assembly wall is assembled to the first region, the second assembly wall is assembled to the second region of the first heat conduction plate, and the second region is used for assembly to the first wall.

[0030] In some possible embodiments, a gap is provided between the connecting wall and the side wall of the second groove, or the connecting wall is attached to the side wall of the second groove.

[0031] In some possible embodiments, the insulating member is arranged to provide a space that allows the pressure reducing mechanism to operate, and a relief cavity is formed between the insulating member and the pressure reducing mechanism.

[0032] The relief cavity can provide a deformation space for the pressure reducing mechanism so that the pressure reducing mechanism can deform and burst towards the assembly member.

[0033] In some possible embodiments, an insulating material is applied to the inner wall of the first through hole.

[0034] The insulating material and insulating member form double insulation against the inner wall of the first through hole, and can further improve the insulating properties of the assembly member.

[0035] In some possible embodiments, the mounting member is a thermal management member for containing a fluid to regulate the temperature of the battery cell.

[0036] In a second aspect, there is provided a power consumer device comprising a battery according to the first aspect or any one possible embodiment of the first aspect above for providing electrical energy.

[0037] In a third aspect, there is provided a method for manufacturing a battery, the method including the steps of: providing a battery cell including a pressure reduction mechanism, the pressure reduction mechanism being provided on a first wall of the battery cell and being activated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; providing an assembly member, the assembly member having a first surface assembled to the first wall and having a first through hole corresponding to the position of the pressure reduction mechanism, through which waste from the battery cell passes through the assembly member when the pressure reduction mechanism is activated; providing an insulating member; and coating at least a portion of the insulating member on the inner wall of the first through hole to insulate and protect the inner wall of the first through hole.

[0038] In a fourth aspect, there is provided a battery manufacturing device including: providing a battery cell including a pressure reduction mechanism, the pressure reduction mechanism being provided on a first wall of the battery cell and being activated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold; providing an assembly member, the assembly member having a first surface assembled to the first wall and having a first through hole corresponding to the position of the pressure reduction mechanism, through which waste from the battery cell passes through the assembly member when the pressure reduction mechanism is activated; and providing an insulating member; and an attachment module for attaching at least a portion of the insulating member to the inner wall of the first through hole to insulate and protect the inner wall of the first through hole. [Brief explanation of the drawings]

[0039] In order to more clearly describe the technical solutions of the embodiments of the present application, the drawings that need to be used in the embodiments of the present application will be briefly described below. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can further obtain other drawings based on the drawings without any creative work. [Figure 1] 1 is a structural schematic diagram of a vehicle disclosed in an embodiment of the present application. [Figure 2] 1 is an exploded structural schematic diagram of a battery disclosed in an embodiment of the present application. [Figure 3] 1 is a structural schematic diagram of a battery cell disclosed in an embodiment of the present application; [Figure 4] 1 is a structural schematic diagram of a battery cell disclosed in an embodiment of the present application; [Figure 5] 1A and 1B are a structural schematic diagram and a locally enlarged view of a battery disclosed in an embodiment of the present application; [Figure 6] FIG. 2 is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 7] FIG. 2 is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 8] FIG. 2 is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 9] FIG. 2 is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 10] FIG. 2 is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 11] FIG. 2 is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 12] FIG. 2 is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 13] FIG. 2 is a structural schematic diagram of a battery disclosed in yet another embodiment of the present application. [Figure 14] FIG. 2 is a structural schematic diagram of a battery disclosed in yet another embodiment of the present application. [Figure 15] FIG. 2 is a structural schematic diagram of a battery disclosed in yet another embodiment of the present application. [Figure 16]1 is a structural schematic diagram of an insulating member disclosed in one embodiment of the present application. [Figure 17] 1 is a structural schematic diagram of an insulating member disclosed in one embodiment of the present application. [Figure 18] 1 is an exploded schematic view of a battery disclosed in one embodiment of the present application. [Figure 19] 1 is a schematic flowchart of a method for manufacturing a battery disclosed in one embodiment of the present application. [Figure 20] 1 is a schematic block diagram of a battery manufacturing apparatus disclosed in accordance with one embodiment of the present application, and in some drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION OF THE INVENTION

[0040] Hereinafter, the embodiments of the present application will be described in more detail with reference to the drawings and examples. The detailed description of the following examples and the drawings are used to exemplify the principles of the present application, but are not intended to limit the scope of the present application, i.e., the present application is not limited to the described examples.

[0041] In the description of this application, it should be understood that "plurality" means two or more (including two) unless otherwise specified. Orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "inner," and "outer" are merely for the purpose of facilitating or simplifying the description of this application and do not indicate or suggest that the designated device or element necessarily has a particular orientation or is configured or operated in a particular orientation, and should not be understood as limiting this application. Furthermore, terms such as "first," "second," and "third" are merely for illustrative purposes and should not be understood as indicating or suggesting relative importance. "Perpendicular" does not mean perpendicular in the strict sense, but means within a tolerance range. "Parallel" does not mean parallel in the strict sense, but means within a tolerance range.

[0042] All directional terms used in the following description refer to the directions shown in the drawings and do not limit the specific structure of the present application. It should be further explained that in the description of the present application, unless otherwise clearly specified or limited, the terms "attach," "connect," and "connect" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a direct connection, or an indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0043] The term "and / or" in this application is simply a relational relationship that describes related objects, and indicates that three relationships may exist. For example, A and / or B can indicate three cases: "A exists," "A and B exist simultaneously," and "B exists." Note that the symbol " / " in this application generally indicates that the related objects before and after it are in an "or" relationship.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of this application. In this application, the terms used in the application specification are merely for the purpose of describing specific embodiments and are not intended to limit the application. The terms "comprise" and "have" and any variations thereof in the specification, claims, and the above brief description of the drawings are intended to cover a non-exclusive inclusion. The terms "first," "second," etc. in the specification, claims, or the above brief description of the drawings are intended to distinguish between different objects and are not intended to describe a particular order or hierarchy.

[0045] When reference is made to an "embodiment" in this application, it means that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of this application. The appearances of this phrase in various places in this specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive, independent, or alternative embodiments. As will be understood, explicitly or implicitly, by one skilled in the art, the embodiments described in this application can be combined with other embodiments.

[0046] In this application, a battery refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0047] Alternatively, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., but examples of the present application are not limited thereto. In some embodiments, the battery cell may be referred to as a cell.

[0048] A battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell operates mainly through the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate 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, and the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer coated thereon, and the positive electrode current collector without the positive electrode active material layer is called a positive electrode tab. Taking a lithium-ion battery as an example, the positive electrode current collector may be made of aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganese oxide, etc. The negative electrode plate 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, and the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer coated thereon. The negative electrode current collector without the negative electrode active material layer is referred to 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. To ensure a large current flow without melting, the positive electrode tabs are multiple and stacked, and the negative electrode tabs are multiple and stacked. The material of the separator may be polypropylene (PP) or polyethylene (PE). The electrode assembly may have a wound structure or a stacked structure, but the present disclosure is not limited thereto.

[0049] The battery housing in the embodiments of the present application is used to house other components of the battery, such as multiple battery cells, busbar members, and thermal management members. In some embodiments, a structure for fixing the battery cells to the housing may be further provided. The shape of the housing may be determined depending on the multiple battery cells to be housed. In some embodiments, the housing may be rectangular with six walls.

[0050] The busbar members referred to in this application are used to realize electrical connections between multiple battery cells, such as parallel connections, series connections, or series-parallel connections. The busbar members can realize the electrical connections between the battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the busbar members can be fixed to the electrode terminals of the battery cells by welding. The busbar members transmit the voltage of the battery cells, and a relatively high voltage can be obtained after the multiple battery cells are connected in series. Accordingly, the electrical connection formed by the busbar members may be referred to as a "high-voltage connection."

[0051] The thermal management member referred to herein is used to contain a fluid to regulate the temperature of a plurality of battery cells. The fluid here may be a liquid or a gas, and regulating the temperature refers to heating or cooling the plurality of battery cells. When cooling or lowering the temperature of the battery cells, the thermal management member is used to contain a cooling fluid to lower the temperature of the plurality of battery cells. In this case, the thermal management member may be referred to as a cooling member, cooling system, or cooling plate, and the fluid contained therein may be referred to as a cooling medium or cooling fluid, more specifically, a coolant or cooling gas. Note that the thermal management member may also be used to heat the plurality of battery cells to increase their temperature, but the embodiments of the present application are not limited thereto. Optionally, the fluid may circulate to achieve a better temperature regulation effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, air, or the like.

[0052] In some battery packaging techniques, multiple battery cells can be first integrated into a battery module, and then the battery module can be attached to a battery housing to form a battery pack. In other battery packaging techniques, multiple battery cells can be directly attached to a battery housing to form a battery pack, which may be referred to as cell-to-pack (CTP) packaging. In the CTP packaging technique, the intermediate stage of the battery module is eliminated, thereby reducing the mass of the battery pack and increasing the energy density of the battery. That is, in the battery packaging process, multiple battery cells may directly form a battery, or a battery module may first be formed, which then forms a battery. The battery is further installed in a power consumption device to provide electrical energy to the power consumption device.

[0053] In the development of battery technology, various design factors such as performance parameters such as energy density, cycle life, discharge capacity, charge / discharge ratio, etc. must be considered simultaneously, and battery safety must also be taken into consideration.

[0054] The main safety hazards in battery cells stem from the charging and discharging processes. An appropriate environmental temperature must be designed to avoid these hazards. To effectively prevent unnecessary losses, at least three protective measures are typically implemented for battery cells. Specifically, these include at least a switching element, the selection of an appropriate separator material, and a pressure reduction mechanism. A switching element is a device that can stop charging or discharging a battery when the temperature or resistance within the battery cell reaches a certain threshold. Separators are used to separate the positive and negative plates. When the temperature rises to a certain level, the micropores on the separator, which are on the order of microns (or even nanometers), can automatically dissolve, preventing metal ions from passing through the separator and terminating the internal reactions in the battery cell.

[0055] The pressure reducing mechanism in a battery cell refers to an element or component that operates to release the internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a predetermined threshold. This threshold can be designed to vary depending on design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell. The pressure reducing mechanism in a battery cell may take the form of, for example, an explosion-proof valve, an air valve, a pressure reducing valve, or a safety valve. Specifically, the pressure reducing mechanism may take the form of a pressure- or temperature-sensitive element or structure. That is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure reducing mechanism operates, or a fragile structure in the pressure reducing mechanism breaks, forming an opening or passage through which the internal pressure or temperature can be released.

[0056] The pressure reduction mechanism on the battery cell has a significant impact on battery safety. For example, if a short circuit or overcharging occurs, thermal runaway may occur inside the battery cell, causing a sudden rise in pressure or temperature. In this case, the pressure reduction mechanism operates to release the internal pressure and temperature, preventing the battery cell from exploding or catching fire.

[0057] As used herein, "operation" refers to the operation or activation of a pressure relief mechanism to release the internal pressure and temperature of a battery cell. Operation by the pressure relief mechanism may include, but is not limited to, rupturing, crushing, tearing, or opening at least a portion of the pressure relief mechanism. When the pressure relief mechanism is activated, high-temperature and high-pressure materials inside the battery cell are discharged as waste from the activated portion. In this way, the battery cell can be depressurized under conditions where the pressure or temperature is controllable, thereby avoiding the possibility of a more serious accident.

[0058] The emissions from battery cells referred to in this application include, but are not limited to, electrolyte, melted or split positive and negative plates, separator fragments, high-temperature and high-pressure gases produced by reactions, flames, etc.

[0059] Battery cell cases are generally made of metal materials such as aluminum or steel, and if the insulation design within the battery is poor, for example, if the conductors surrounding the battery cell are in direct contact with the battery cell case, the battery cell is likely to short-circuit. A short circuit can cause thermal runaway inside the battery cell, resulting in a sudden rise in pressure or temperature, which can lead to safety issues such as battery cell explosion or fire.

[0060] Current insulation design solutions typically achieve insulation between battery cells and conductors by coating the surfaces of the conductors surrounding the battery cells with insulating material. However, in actual applications, some conductor components have holes depending on design requirements, and current insulation designs do not consider insulating protection for the inner walls of the holes. Batteries are mounted to power-consuming devices, such as vehicles. The movement of power-consuming devices such as vehicles subjects the battery to certain impacts. To fully utilize the space within the battery, the battery's internal design is compact, with very small distances between components. Impacts from the power-consuming device on the battery could cause the inner walls of the holes, which lack insulating protection, to come into contact with the battery cell case, potentially causing a short circuit, posing a safety risk.

[0061] In view of this, the present application provides a technical solution for improving the safety of a battery by insulating and protecting a first through hole provided in an assembly member that is assembled to a battery cell with an insulating member. More specifically, in order to insulate and protect the inner wall of the first through hole, at least a portion of the insulating member is attached to the inner wall of the first through hole. In this way, the insulation properties of the assembly member are improved, and it is possible to prevent a short circuit phenomenon caused by a battery cell coming into direct contact with the inner wall of the first through hole, thereby reducing safety risks and improving the safety of the battery.

[0062] The technical solutions described in the embodiments of the present application are applicable to various battery-powered devices, such as mobile phones, portable devices, laptops, electric bicycles, electric toys, power tools, electric vehicles, ships, and spacecraft, for example, spacecraft including airplanes, rockets, space shuttles, and spaceships.

[0063] It should be understood that the technical solutions described in the embodiments of the present application are not only applicable to the devices described above, but also to all devices that use batteries. However, for the sake of simplicity, the following embodiments will be described using electric vehicles as examples.

[0064] In the following, structures or methods provided by the embodiments of the present application will be described with reference to Figures 1 to 20. For clarity and conciseness, reference numerals in previous drawings will be used in the description of some embodiments, but it should be noted that these reference numerals may not all be shown in the drawings corresponding to the embodiments of this portion.

[0065] For example, FIG. 1 shows a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a gasoline-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle may be a rechargeable battery-powered electric vehicle, a hybrid electric vehicle, or a range-extending electric vehicle. A motor 40, a controller 30, and a battery 10 may be provided inside the vehicle 1, and the controller 30 may be used to control the battery 10 to supply power to the motor 40. For example, the battery 10 may be provided at the bottom, front, or tail of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, and for power needs during startup, navigation, and driving of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power to the vehicle 1 instead of, or in place of, fuel oil or natural gas.

[0066] To meet different power usage needs, a battery can include multiple battery cells, which can be connected in series, parallel, or series-parallel, with the series-parallel connection referring to a combination of series and parallel connections. A battery may also be called a battery pack. Alternatively, multiple battery cells can be first connected in series, parallel, or series-parallel to form a battery module, and then multiple battery modules can be connected in series, parallel, or series-parallel to form a battery. That is, multiple battery cells can directly form a battery, or a battery module can be first formed, and then the battery module can be used to form a battery.

[0067] For example, FIG. 2 is a structural schematic diagram of a battery 10 according to an embodiment of the present application. The battery 10 may include a plurality of battery cells 20. The battery 10 may further include a housing (also called a cover) 11, the interior of which is hollow, and the plurality of battery cells 20 are housed within the housing 11. Exemplarily, referring to FIG. 2 , the housing 11 may include two parts, referred to herein as a first part 111 and a second part 112, respectively, which are engaged with each other to form a housing space for housing the plurality of battery cells 20. The shapes of the first part 111 and the second part 112 may be determined according to the shape of the plurality of battery cells 20 after being combined, and each of the first part 111 and the second part 112 may have an opening. For example, the first part 111 and the second part 112 may both be hollow rectangular parallelepipeds, each with only one open surface, the opening of the first part 111 and the opening of the second part 112 being provided opposite each other, and the first part 111 and the second part 112 being engaged with each other to form a housing having a sealed cavity. A plurality of battery cells 20 are combined by being connected in parallel, series, or series-parallel with each other, and then placed in the housing formed after the first part 111 and the second part 112 are engaged with each other.

[0068] Alternatively, in one embodiment, a plurality of battery cells 20 may be first integrated into at least one battery module, and then the battery module may be attached to the housing 11 to form a battery pack. In this embodiment, auxiliary structures such as cross beams may be further provided between the battery modules to improve the attachment stability of the battery modules in the housing 11.

[0069] Alternatively, in another embodiment, multiple battery cells 20 can be directly connected to each other and attached to the housing 11 to form a battery pack. Because the intermediate state of the battery module is eliminated, auxiliary structures such as cross beams do not need to be provided on the housing 11, which reduces the weight of the battery 10 and increases the energy density of the battery 10. This embodiment may be referred to in the related art as a cell-to-pack (CTP) attachment technique.

[0070] Alternatively, in another embodiment, the housing 11 may be integrated into the power consuming device in which the battery 10 is located. In other words, the housing 11 may be integrally formed with a structure in the power consuming device. After the plurality of battery cells 20 are connected to each other, they may be directly attached to the housing 11 in the power consuming device. For example, the housing 11 may be integrated into a local area of ​​the chassis of the vehicle 1, and after the plurality of battery cells 20 are connected to each other, they may be directly attached to the chassis of the vehicle 1. This embodiment may be referred to in the related art as a cell-to-chassis (CTC) attachment technique.

[0071] Optionally, the battery 10 may further include other structures, which will not be described here repeatedly. For example, the battery 10 may further include busbar members for realizing electrical connection between the multiple battery cells 20, such as a parallel connection, a series connection, or a series-parallel connection. Specifically, the busbar members can connect the electrode terminals of the battery cells 20 to realize the electrical connection between the battery cells 20. Furthermore, the busbar members can be fixed to the electrode terminals of the battery cells 20 by welding. Electrical energy from the multiple battery cells 20 can further be extracted through the housing 11 by a conductive mechanism. Optionally, the conductive mechanism may belong to the busbar members.

[0072] According to various power needs, the number of battery cells 20 may be set to any value. Multiple battery cells 20 can be connected in series, parallel, or series-parallel to achieve large capacity or power.

[0073] 3 is a structural schematic diagram of a battery cell 20 according to one embodiment of the present application. The battery cell 20 may include a battery box 21 and one or more electrode assemblies 22 housed in the battery box 21. In some embodiments, the battery box 21 may be referred to as a case.

[0074] Referring to FIG. 3 , the battery box 21 may include a housing 211 and a cover plate 212. The walls of the housing 211 and the cover plate 212 are both referred to as walls of the battery cell 20. The housing 211 is determined according to its shape after assembling one or more electrode assemblies 22. For example, the housing 211 may be a hollow rectangular parallelepiped, cube, or cylinder. At least one surface of the housing 211 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 211. For example, if the housing 211 is a hollow rectangular parallelepiped or cube, one plane of the housing 211 may be an open surface, i.e., the plane does not have a wall, thereby allowing communication between the inside and outside of the housing 211. If the housing 211 is a hollow cylinder, an end surface of the housing 211 may be an open surface, i.e., the end surface does not have a wall, thereby allowing communication between the inside and outside of the housing 211. The cover plate 212 covers the opening and is connected to the housing 211 so as to form a sealed cavity in which the electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, for example, an electrolyte solution.

[0075] 3, one side of the housing 211 has an opening, and the cover plate 212 covers the opening and is connected to the housing 211. In another embodiment, two opposing sides of the housing 211 both have openings, and the cover plate 212 can include a first cover plate and a second cover plate that cover the openings on the two sides and are connected to the housing 211, respectively.

[0076] The battery cell 20 may further include two electrode terminals 214. Alternatively, as shown in Fig. 3, the two electrode terminals 214 may be provided on the same cover plate 212. Alternatively, in another embodiment, the two electrode terminals 214 may be provided on the first and second cover plates, respectively, as described above, although the embodiment of the present application is not limited thereto.

[0077] The cover plate 212 is generally flat, and two electrode terminals 214, a positive electrode terminal 214a and a negative electrode terminal 214b, are fixed to the flat surface of the cover plate 212. Each electrode terminal 214 is provided with a corresponding connecting member 23, which may also be called a current collecting member 23, and is located between the cover plate 212 and the electrode assembly 22 to establish an electrical connection between the electrode assembly 22 and the electrode terminals 214.

[0078] As shown in FIG. 3 , in the battery cell 20, each electrode assembly 22 has a first tab 22a and a second tab 22b. The polarities of the first tab 22a and the second tab 22b are opposite. For example, if the first tab 22a is a positive electrode tab, the second tab 22b is a negative electrode tab. The first tab 22a of one or more electrode assemblies 22 is connected to one electrode terminal via one connection member 23, and the second tab 22b of one or more electrode assemblies 22 is connected to another electrode terminal via another connection member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab via one connection member 23, and the negative electrode terminal 214b is connected to the negative electrode tab via another connection member 23.

[0079] In the battery cell 20, the number of electrode assemblies 22 can be flexibly set according to actual usage needs, and as shown in FIG. 3, four independent electrode assemblies 22 are provided in the battery cell 20.

[0080] 4 is a structural schematic diagram of a battery cell 20 according to another embodiment of the present invention. The difference from the battery cell 20 shown in FIG. 3 is that a pressure reducing mechanism 213 may be further provided on one wall of the battery cell 20. The pressure reducing mechanism 213 is used to operate and release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0081] For example, referring to FIG. 4, a pressure reducing mechanism 213 may be provided on the first wall 215 of the battery cell 20 .

[0082] The first wall 215 is a part of the housing 211, and the housing 211 may be formed by the first wall 215 and the remaining part of the housing 211 being formed by an integral molding process, or by the first wall 215 closing an opening in the remaining part of the housing 211. For ease of explanation, the first wall 215 is shown separated from the housing 211 in FIG. 4 , but this does not limit the housing 211 to having an opening on the bottom side.

[0083] The pressure reduction mechanism 213 may be a part of the wall where it is located, or may be a separate structure from the wall where it is located, and may be fixed to the wall where it is located by, for example, welding. For example, in the embodiment shown in FIG. 4 , when the pressure reduction mechanism 213 is a part of the first wall 215, the pressure reduction mechanism 213 may be formed by forming a notch in the first wall 215, and the thickness of the first wall 215 corresponding to the notch is smaller than the thickness of the other areas of the pressure reduction mechanism 213 excluding the notch. The notch is the most vulnerable point of the pressure reduction mechanism 213. If too much gas is released from the battery cell 20 and the internal pressure of the housing 211 rises to a threshold value, or if a reaction occurs inside the battery cell 20 and heat is generated, causing the internal temperature of the battery cell 20 to rise to a threshold value, the pressure reduction mechanism 213 can rupture at the notch to communicate between the inside and outside of the housing 211. The gas pressure and temperature are released to the outside by the rupture of the pressure reduction mechanism 213, further preventing the explosion of the battery cell 20.

[0084] Alternatively, in one embodiment of the present application, the pressure reducing mechanism 213 and the electrode terminal 214 may be provided on the same wall of the battery cell 20. For example, the electrode terminal 214 and the pressure reducing mechanism 213 may both be provided on the cover plate 212, which is the top wall of the battery cell 20.

[0085] By providing the pressure reducing mechanism 213 and the electrode terminal 214 on the same wall of the battery cell 20, for example, on the cover plate 212 of the battery cell 20, the processing and installation of the pressure reducing mechanism 213 and the electrode terminal 214 can be facilitated, which helps improve the manufacturing efficiency of the battery 10.

[0086] Of course, in other embodiments of the present application, the pressure reducing mechanism 213 may be provided on a wall of the battery cell 20 different from the electrode terminal 214. For example, when the pressure reducing mechanism 213 is provided on the first wall 215 of the battery cell 20, the electrode terminal 214 may be provided on a second wall of the battery cell 20, where the second wall is different from the first wall 215. For example, as shown in FIG. 4 , the electrode terminal 214 is provided on the cover plate 212, which is the top wall of the battery cell 20, while the pressure reducing mechanism 213 is provided on the first wall 215, which is the bottom wall opposite the top wall. Alternatively, the two electrode terminals 214 are provided on the cover plate 212 and the first wall 215 of the battery cell 20, respectively, while the pressure reducing mechanism 213 is provided on another wall of the case 21 other than the cover plate 212 and the first wall 215.

[0087] By providing the pressure reducing mechanism 213 and the electrode terminal 214 on different walls of the battery cell 20, when the pressure reducing mechanism 213 is activated, waste from the battery cell 20 is further away from the electrode terminal 214, reducing the impact of the waste on the electrode terminal 214 and the bus bar members, thereby improving battery safety. Furthermore, if the electrode terminal 214 is provided on the cover plate 212 of the battery cell 20, providing the pressure reducing mechanism 213 on the bottom wall of the battery cell 20 allows waste from the battery cell 20 to be discharged to the bottom of the battery 10 when the pressure reducing mechanism 213 is activated. In this way, the risk of waste can be reduced by using a thermal management member or the like on the bottom of the battery 10, while the bottom of the battery 10 is away from the normal user, reducing damage to the user.

[0088] 4 , the battery cell 20 may further include a backing plate 24. The backing plate 24 is located between the electrode assembly 22 and the bottom wall of the housing 211 and serves to support the electrode assembly 22 and effectively prevent interference between the electrode assembly 22 and the peripheral fillet of the bottom wall of the housing 211. The backing plate 24 may also have one or more through-holes, such as a uniformly arranged plurality of through-holes. Alternatively, if a pressure reducing mechanism 213 is provided in the bottom wall of the housing 211, a through-hole may be provided corresponding to the pressure reducing mechanism 213 to facilitate the introduction of liquid and gas. Specifically, the spaces above and below the backing plate 24 are connected in this manner, allowing all gas and electrolyte generated inside the battery cell 20 to pass freely through the backing plate 24.

[0089] The pressure reduction mechanism 213 may be various possible pressure reduction mechanisms, and the embodiments of the present application are not limited thereto. For example, the pressure reduction mechanism 213 may be a temperature-sensitive pressure reduction mechanism that is arranged to melt when the internal temperature of the battery cell 20 provided with the pressure reduction mechanism 213 reaches a threshold, and / or the pressure reduction mechanism 213 may be a pressure-sensitive pressure reduction mechanism that is arranged to burst when the internal air pressure of the battery cell 20 provided with the pressure reduction mechanism 213 reaches a threshold.

[0090] 5 is a structural schematic diagram and a local enlarged view of a battery provided by an embodiment of the present application. As shown in FIG. 5, a battery 10 may include a battery cell 20, an assembly member 13, and an insulating member 14.

[0091] The battery cell 20 includes a pressure reducing mechanism 213, which is provided on a first wall 215 of the battery cell 20, and is used to be activated to release the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. For example, the battery cell 20 may be the battery cell 20 in FIG. 4 .

[0092] A first surface 13a (for example, the upper surface shown in FIG. 5 ) of the assembly member 13 is assembled to the first wall 215. The assembly member 13 is provided with a first through-hole 101 corresponding to the position of the pressure reducing mechanism 213, and the first through-hole 101 is used to allow waste from the battery cells 20 to pass through the assembly member 13 when the pressure reducing mechanism 213 is activated.

[0093] At least a portion of the insulating member 14 is attached to the inner wall 13b of the first through hole 101 to insulate and protect the inner wall 13b of the first through hole.

[0094] In the embodiment of the present application, a first through-hole 101 is provided in the assembly member 13, and at least a portion of the insulating member 14 is attached to the inner wall 13b of the first through-hole. In this way, the insulating member 14 can insulate and protect the inner wall 13b of the first through-hole, improving the insulation of the assembly member 13 and preventing a short circuit from occurring due to direct contact of the battery cell 20 with the inner wall 13b of the first through-hole. This reduces safety risks and improves battery safety. In addition, the first surface 13a of the assembly member 13 is assembled to a first wall 215 provided with a pressure reduction mechanism 213. When the pressure reduction mechanism 213 is activated, waste from the battery cell 20 is discharged into the first through-hole 101. The waste passes through the assembly member 13 via the first through-hole 101 and is quickly discharged away from the battery cell 20, reducing the risk and improving battery safety.

[0095] In the present embodiment, the insulating member 14 is made of an insulating material, including, but not limited to, resins (e.g., thermoplastic synthetic resins, thermosetting synthetic resins, etc.), plastics (e.g., polyethylene, polyvinyl chloride, etc.), and products thereof.

[0096] In the embodiments of the present application, it is understood that the fact that at least a portion of the insulating member 14 is attached to the inner wall 13b of the first through hole 101 means that at least a portion of the insulating member 14 completely covers the inner wall 13b of the first through hole. The method of attaching the insulating member 14 to the inner wall 13b of the first through hole may be by adhesive, riveting, locking, interference fit, etc., but the present application is not limited thereto.

[0097] Optionally, in some embodiments, the inner wall 13b of the first through hole is coated with an insulating material.

[0098] The insulating material and the insulating member 14 form double insulation for the inner wall 13b of the first through hole, and the insulating properties of the assembly member 13 can be further improved.

[0099] Optionally, the shape of the first through hole 101 can be flexibly designed according to actual needs, and may be, for example, a cylinder, a rectangular parallelepiped, a cube, a triangular prism, a truncated square pyramid, a truncated cone, or other shapes, but the embodiments of the present application are not limited thereto.

[0100] 5, in one embodiment of the present application, the insulating member 14 may be a hollow column, and the outer surface of the side wall of the hollow column may be assembled to the inner wall 13b of the first through-hole. For example, but not limited to, there may be an interference fit between the side wall of the hollow column and the inner wall 13b of the first through-hole, thereby firmly connecting the insulating member 14 and the assembly member 13 and providing insulating protection for the inner wall 13b of the first through-hole.

[0101] In the embodiment of the present application, it should be understood that the shape of the insulating member 14 is adapted to the shape of the first through hole 101, and therefore the shape of the insulating member 14 can be determined according to the shape of the first through hole 101. For example, if the first through hole 101 is cylindrical, the insulating member 14 may be a hollow column, and if the first through hole 101 is cubic, the insulating member 14 may be a hollow square ring.

[0102] Optionally, as shown in FIG. 6, in another embodiment of the present application, a first groove 102 is provided in the insulating member 14, and a side wall 142 of the first groove is fitted into the first through hole 101, and an outer edge 141 of the first groove is assembled to the first surface 13a.

[0103] Alternatively, the insulating member 14 may include a first sub-portion and a second sub-portion, and the second sub-portion is recessed relative to the first sub-portion in a direction away from the pressure reducing mechanism 213 to form a first groove 102. The first sub-portion may be considered to be an outer edge 141 of the first groove, and a portion of the second sub-portion parallel to (or assembled with) the inner wall 13b of the first through-hole 101 may be considered to be a side wall 142 of the first groove. Optionally, in some embodiments, if there is a portion of the second sub-portion that covers (or blocks) the first through-hole 101 after the second sub-portion is recessed, a portion of the second sub-portion corresponding to the position of the first through-hole 101 may be considered to be a bottom wall 143 of the first groove. In the embodiment of the present application, the entire portion of the insulating member 14 excluding the bottom wall 143 of the first groove and the side wall 142 of the first groove can be regarded as the outer edge 141 of the first groove.

[0104] In the embodiments of the present application, the fact that the side wall 142 of the first groove is fitted into the first through hole 101 is understood to mean that at least a portion of the side wall 142 of the first groove is fitted into the first through hole 101. The fact that the outer edge 141 of the first groove is assembled to the first surface 13a means that at least a portion of the outer edge 141 of the first groove is assembled to the first surface 13a of the assembly member 13.

[0105] In this way, in the actual installation process, the insulating member 14 provided with the first groove 102 can be directly fitted into the first through hole 101 provided in the assembly member 13, not only covering the inner wall 13b of the first through hole and providing insulating protection for the inner wall 13b of the first through hole, but also easily and stably fixing the insulating member 14 to the assembly member 13, thereby improving the assembly efficiency of the battery.

[0106] Optionally, referring to FIG. 6 , in some embodiments, a second through-hole 103 may be provided in the bottom wall 143 of the first groove, and the second through-hole 103 is used to allow discharged matter from the battery cell 20 to pass through the insulating member 14 when the pressure reducing mechanism 213 is activated.

[0107] Therefore, when the pressure reducing mechanism 213 is activated, the discharged matter from the battery cell 20 is quickly discharged through the second through-hole 103 and away from the battery cell 20, thereby reducing the risk and improving the safety of the battery.

[0108] Optionally, in the embodiment of the present application, the second through-hole 103 can be disposed opposite to the pressure reducing mechanism 213, i.e., the position of the second through-hole 103 corresponds to the position of the pressure reducing mechanism 213. In this way, when the pressure reducing mechanism 213 is activated, the waste can be discharged directly through the second through-hole 103.

[0109] Optionally, referring to FIG. 7, in another embodiment, the bottom wall 143 of the first groove is used to close the first through-hole 101. That is, the bottom wall 143 of the first groove does not have a through-hole.

[0110] In this way, the bottom wall 143 of the first groove can isolate the pressure reduction mechanism 213 so that the space in which the pressure reduction mechanism 213 is located does not communicate with the outside, and can prevent foreign matter such as aluminum chips inside the housing 11 from entering the space in which the pressure reduction mechanism 213 is located through the first through-hole 101. This prevents problems such as insulation failure of the battery cell or destruction of the pressure reduction mechanism of the battery cell by foreign matter, and can avoid the occurrence of further safety issues.

[0111] Optionally, to facilitate the passage of the effluent through the insulating member 14, in some embodiments, the bottom wall 143 of the first groove is disposed so as to be ruptured by the effluent when the pressure-reducing mechanism 213 is activated, so that the effluent can pass through the insulating member 14. That is, when the pressure-reducing mechanism 213 is not activated, the bottom wall 143 of the first groove can close the first through-hole 101, so as to prevent foreign matter from entering the space where the pressure-reducing mechanism 213 is located and affecting the pressure-reducing performance of the pressure-reducing mechanism 213. When the pressure-reducing mechanism 213 is activated, the bottom wall 143 of the first groove is ruptured so that the effluent can pass smoothly through the insulating member 14 and be discharged outside the battery cell 20.

[0112] 8 , a weakened area 104 may be provided in the bottom wall 143 of the first groove, and the weakened area 104 is arranged so that it can be broken by the effluent when the pressure-reducing mechanism 213 is activated, so that the effluent passes through the weakened area 104. By providing the weakened area 104, the bottom wall 143 of the first groove is more easily broken by the effluent of the battery cell 20, which helps to quickly depressurize the battery cell 20.

[0113] Optionally, the weakened area 104 can be positioned opposite the pressure reducing mechanism 213. In this way, when the pressure reducing mechanism 213 is activated, the waste material can directly impact the weakened area 104, causing it to open.

[0114] The weakened area 104 may adopt various configurations that are susceptible to destruction by the discharged material, and the embodiments of the present application are not limited thereto, and will be described below by way of example.

[0115] Optionally, in one embodiment of the present application, a low melting point material may be used for the portion of the bottom wall 143 of the first groove facing the pressure reducing mechanism 213 to form the weakened region 104. That is, the melting point of the weakened region 104 is lower than that of other portions of the insulating member 14. For example, the melting point of the material used for the weakened region 104 is lower than 400°C.

[0116] When the pressure reducing mechanism 213 is activated, the weakened area 104 is more likely to melt and break down due to the effluent than other parts of the bottom wall 143 of the first recessed groove.

[0117] Optionally, as shown in FIG. 9 , in another embodiment of the present application, a groove 105 is provided on the bottom wall 143 of the first groove, facing the pressure reducing mechanism 213, and the bottom wall of the groove 105 forms a weakened region 104. That is, the thickness of the weakened region 104 is smaller than the thickness of other parts of the insulating member 14. For example, the thickness of the weakened region 104 is 3 mm or less. Further, for example, the thickness of the weakened region 104 may be 1 mm or less. The thickness of the weakened region 104 can be determined according to actual needs and / or experimental data, and the embodiment of the present application is not limited thereto.

[0118] Because the bottom wall of the groove 105 is weaker than other areas of the insulating member 14 and is more easily destroyed by the waste, when the pressure reducing mechanism 213 is activated, the waste can destroy the bottom wall of the groove 105 and pass through the insulating member 14.

[0119] Optionally, the groove 105 is provided on the surface of the bottom wall 143 of the first groove facing the first wall 215. That is, the opening of the groove 105 faces the first wall 215.

[0120] It should be understood that the opening of the groove 105 may face away from the first wall 215. In this case, the bottom wall of the groove 105 would be similarly susceptible to being destroyed by the waste.

[0121] It should be understood that the bottom wall 143 of the first groove can also be thinned by other thinning methods, such as providing a blind hole or a stepped hole in the bottom wall 143 of the first groove to form the weakened area 104, and these will not be described in detail here.

[0122] Optionally, in yet another embodiment of the present application, a cut is provided in the bottom wall 143 of the first groove to form the weakened region 104. For example, a cross-shaped cut, a square-shaped cut, a square-shaped cut, or the like may be provided in the bottom wall 143 of the first groove.

[0123] The thickness of the bottom wall 143 of the first groove corresponding to the notch is smaller than the thickness of the other areas of the bottom wall 143 of the first groove excluding the notch, so the notch is the weakest point of the bottom wall 143 of the first groove. When the pressure reducing mechanism 213 is activated, the waste can burst the bottom wall 143 of the first groove at the notch. Therefore, the waste can break the bottom wall 143 of the first groove and pass through the insulating member 14.

[0124] It should be understood that the weakened area 104 can simultaneously adopt at least two of the following methods: low melting point material, setting a small thickness, and providing a notch; that is, the above three embodiments can be implemented alone or in combination.

[0125] Optionally, as shown in Figures 6 to 9, in the embodiment of the present application, the assembly member 13 can be arranged to be assembled to the first wall 215 by adhesive 15. The insulating member 14 is arranged to prevent the adhesive 15 from being applied between the assembly member 13 and the pressure reducing mechanism 213.

[0126] Therefore, the insulating member 14 not only insulates and protects the inner wall 13b of the first through hole provided in the assembly member 13, but also effectively prevents the adhesive 15 from being applied between the assembly member 13 and the pressure-reducing mechanism 213 during the battery manufacturing process, thereby inhibiting or affecting the operating performance of the pressure-reducing mechanism 213. Furthermore, the efficiency and accuracy of applying the adhesive 15 can be improved, thereby improving the manufacturing efficiency of the battery.

[0127] Optionally, in some embodiments, the pressure reducing mechanism 213 has an activation region, and the pressure reducing mechanism 213 is arranged to form a release passage in the activation region for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The outer edge 141 of the first groove is arranged to surround at least the activation region to prevent the adhesive 15 from entering the activation region.

[0128] The discharge passage formed in the operating area when the pressure-reducing mechanism 213 is activated guides waste from the battery cells 20 to be discharged to the outside through the formed discharge passage in the event of thermal runaway in the battery, thereby improving the safety performance of the battery. The outer edge 141 of the first groove surrounds at least the operating area, preventing adhesive 15 from flowing into the operating area from any direction and causing any disruption or adverse effects on the operation of the pressure-reducing mechanism 213. This more reliably prevents adhesive 15 from interfering with the normal operation of the pressure-reducing mechanism 213 and also prevents adhesive 15 from flowing in and blocking the discharge passage, which would further block the discharge of waste from the battery cells 20. This further improves the safety performance of the battery.

[0129] In the embodiments of the present application, the insulating member 14 can adopt various possible structures so as to isolate the adhesive 15 used to assemble the battery cells 20 to the assembly member 13 from the space between the assembly member 13 and the pressure reduction mechanism 213, or to isolate the applied adhesive 15 from a space into which the adhesive 15 flows and which affects the pressure reduction function of the pressure reduction mechanism 213 as designed. For example, the insulating member 14 may be designed as a part of an area surrounding the pressure reduction mechanism 213 (which may be referred to as an operating area or a release area) that forms a release passage for releasing the internal pressure of the battery cells 20 when the pressure reduction mechanism 213 is activated and through which discharged matter can flow out, or may be an area that is assembled to the assembly member 13 and corresponds to the pressure reduction mechanism 213 so as to surround a space provided by the assembly member 13 that enables the pressure reduction mechanism 213 to operate.

[0130] In some embodiments, the insulating member 14 can be attached to the assembly member 13 in an area corresponding to the pressure-reducing mechanism 213 before applying the adhesive 15. It should be noted that any component in a battery that is attached to the battery cell 20 by the adhesive 15 can be considered to belong to or be part of the assembly member, and any of these components can use the insulating member 14, i.e., the insulating member 14 can be attached thereto before applying the adhesive 15. In this way, when applying the adhesive 15, the insulating member 14 prevents the adhesive 15 from entering the area of ​​the assembly member 13 corresponding to the pressure-reducing mechanism 213, particularly the area of ​​the pressure-reducing mechanism 213 that forms a release passage for releasing the internal pressure of the battery cell 20 and allows waste to flow out, thereby ensuring that the pressure-reducing mechanism 213 can operate and properly realize its designed function. Furthermore, by employing the insulating member 14, there is no need to worry about the adhesive 15 being applied to an area related to the operation of the pressure-reducing mechanism 213, which improves the speed and accuracy of applying the adhesive 15 and saves manufacturing time and costs.

[0131] Optionally, as shown in FIG. 10 , in some embodiments, a protrusion 141a is provided on the outer edge 141 of the first groove, and the protrusion 141a protrudes from the first surface 13a and is arranged to surround the pressure reducing mechanism 213, and the protrusion 141a is used to prevent the adhesive 15 from being applied between the assembly member 13 and the pressure reducing mechanism 213.

[0132] This arrangement makes it possible to simply and effectively prevent the adhesive 15 from being applied to the surface of the pressure reducing mechanism 213 during the battery manufacturing process, thereby preventing interference with the operation of the pressure reducing mechanism 213.

[0133] For example, the outer edge 141 of the first groove may include a main body and a protrusion 141a. The main body is used to be attached to or assembled with the mounting member 13. The protrusion 141a protrudes outward from the surface of the main body, and is disposed so that, when assembled in a predetermined position, the protrusion 141a protrudes from the surface of the main body in a direction away from the mounting member 13, i.e., protrudes toward the battery cell 20. The protrusion 141a is disposed to surround the pressure reducing mechanism 213, and may, for example, have a ring-shaped structure.

[0134] 11, in one embodiment, the protrusion 141a may include a flange structure 141b formed by bending the outer edge 141 of the first groove. For example, the flange structure 141b may be formed by bending the outermost portion of the outer edge 141 of the first groove toward one side of the battery cell 20 with respect to the first surface 13a.

[0135] By providing the edge of the insulating member 14 as a flange structure 141b, not only is it easier to process and shape the insulating member 14, but it also simply and effectively prevents the adhesive 15 from being applied to the surface of the pressure reduction mechanism 213 during the battery manufacturing process.

[0136] In the embodiment of the present application, the specific structure of the flange structure 141b is not limited as long as it can achieve the adhesive blocking function of the edge of the insulating member 14.

[0137] For example, when the insulating member 14 is assembled to the assembly member 13 but the assembly member 13 is not assembled to the battery cell 20, the flange structure 141b is in a free state. Referring to FIG. 11(a), which is a schematic diagram of the state before the battery cell 20 and the assembly member 13 are assembled, the height between the flange structure 141b and the first surface 13a may gradually increase in the direction away from the center line of the first through hole 101. Of course, in other embodiments, the height between the flange structure 141b and the first surface 13a may increase in the direction away from the center line of the first through hole 101 and then decrease, or may remain unchanged.

[0138] When the assembly member 13 is assembled to the battery cell 20, the flange structure 141b may be deformed by the force. Referring to the schematic diagram of the assembled state of the battery cell 20 and the assembly member 13 shown in FIG. 11(b), the height between the first surface 13a and the portion of the flange structure 141b that contacts the battery cell 20 can be maintained constant in the direction away from the center line of the first through hole 101, and the height between the first surface 13a and the portion of the flange structure 141b that does not contact the battery cell 20 can gradually increase in the direction away from the center line of the first through hole 101.

[0139] Optionally, in the embodiment of the present application, the maximum height from the protrusion 141a to the first surface 13a is equal to or greater than the predetermined application height of the adhesive 15, and is arranged so as to be compressed to match the height of the adhesive 15 when the battery cell 20 is assembled to the assembly member 13.

[0140] 11(a) and (b), for example, the protrusion 141a includes a flange structure 141b, and before the battery cell 20 is assembled to the assembly member 13, the maximum height between the flange structure 141b and the first surface 13a is equal to or greater than the predetermined application height of the adhesive 15. After the battery cell 20 is assembled to the assembly member 13, the maximum height between the flange structure 141b and the first surface 13a corresponds to the height of the adhesive 15 after compression.

[0141] This arrangement ensures that the protrusions 141a can effectively prevent the adhesive 15 from being applied between the assembly member 13 and the pressure-reducing mechanism 213. Furthermore, the insulating member 14 does not affect the reliable adhesion between the assembly member 13 and the pressure-reducing mechanism 213 or the operation of the pressure-reducing mechanism 213. Furthermore, when the battery cell 20 and the assembly member 13 are crimped or joined with the adhesive 15, the protrusions 141a can be compressed to a height that matches the adhesive 15, and thus the protrusions 141a do not leave any gaps between the bonding surfaces of the battery cell 20 and the assembly member 13, which more reliably ensures that the adhesive 15 is isolated from the area where the pressure-reducing mechanism 213 operates and forms a passage for waste.

[0142] Alternatively, in some embodiments, the region of the assembly member 13 where the first through-hole 101 is provided may be a flat region as shown in Figures 5 to 11. In other embodiments, a recessed groove may be further provided in the region of the assembly member 13 where the first through-hole 101 is provided.

[0143] 12, in one embodiment, the assembly member 13 is provided with a second groove 13c facing the pressure reducing mechanism 213, and a first through-hole 101 is provided in the bottom wall of the second groove 13c. An outer edge 141 of the first groove includes a first assembly wall 144 connected to a side wall 142 of the first groove, and the first assembly wall 144 is assembled to the bottom wall of the second groove 13c.

[0144] In the embodiment of the present application, the second groove 13c is provided in the assembly member 13 opposite the pressure reducing mechanism 213, thereby providing a buffer space for the discharged material from the battery cell 20, reducing the impact pressure on the external structure or components caused by the discharged material from the battery cell 20, and further improving the safety performance of the battery.

[0145] It should be noted that when the first mounting wall 144 is mounted to the bottom wall of the second groove 13c, the remaining part of the outer edge 141 of the first groove excluding the first mounting wall 144 may be mounted to the bottom wall of the second groove 13c, as shown in Fig. 12. Alternatively, the remaining part of the outer edge 141 of the first groove excluding the first mounting wall 144 may extend to the first surface 13a so as to be mounted to the first surface 13a.

[0146] Fig. 13 is a plan view schematic diagram of a battery provided by an example of the present application, Fig. 14 is a cross-sectional view schematic diagram of the battery in Fig. 13 cut along line AA, and Fig. 15 is an enlarged schematic diagram of local structure B of the battery shown in Fig. 14. The structure of insulating member 14 will be described below with reference to Figs. 13 to 15.

[0147] 13 to 15, the assembly member 13 may include a first heat conduction plate 131 and a second heat conduction plate 132. The first heat conduction plate 131 is located between a first wall 215 and the second heat conduction plate 132, and is assembled to the first wall 215. A first region 131a of the first heat conduction plate 131 is recessed into the second heat conduction plate 132 to form a second recessed groove 13c. The first region 131a is connected to the second heat conduction plate 132, and the first through-hole 101 is provided in the first region 131a.

[0148] The outer edge 141 of the first groove may include a first mounting wall 144, a second mounting wall 145, and a connecting wall 146, and the second mounting wall 145 is connected to the first mounting wall 144 via the connecting wall 146. The first mounting wall 144 is mounted to the first region 131a, and the second mounting wall 145 is mounted to the second region 131b of the first heat conduction plate 131, and the second region 131b is used for mounting to the first wall 215.

[0149] Optionally, the outer edge 141 of the first groove further includes a flange structure 141b located on the edge.

[0150] In the embodiment of the present application, the insulating member 14 having the above structure can insulate and protect the inner wall of the first through-hole 101. Furthermore, the bottom wall 143 of the first groove can close the first through-hole 101 to prevent foreign matter such as aluminum chips from entering the space where the pressure-reducing mechanism 213 is located. In addition, the flange structure 141b located on the edge of the outer periphery 141 of the first groove can prevent the adhesive 15 from entering between the pressure-reducing mechanism 213 and the assembly member 13, ensuring that the pressure-reducing mechanism 213 can operate normally.

[0151] Alternatively, in some embodiments, a gap may be provided between the connecting wall 146 and the side wall of the second groove 13 c, or the connecting wall 146 may be attached to the side wall of the second groove 13 c. Specific details may be designed according to actual needs, and the embodiments of the present application are not limited thereto.

[0152] Optionally, still referring to FIG. 15 , in one embodiment, the insulating member 14 is arranged to provide a space that allows the pressure reducing mechanism 213 to operate, and a relief cavity is formed between the insulating member 14 and the pressure reducing mechanism 213. The relief cavity can provide a deformation space for the pressure reducing mechanism 213 so that the pressure reducing mechanism 213 deforms toward the assembly member 13 and ruptures. Specifically, the relief cavity can be a sealed cavity or a non-sealed cavity formed by both the insulating member 14 and the pressure reducing mechanism 213. For example, the first recessed groove 102 introduced above can be arranged as a relief cavity that can open when the pressure reducing mechanism 213 operates.

[0153] When the first groove 102 is used as a relief cavity, the arrangement of the first groove 102 must satisfy the condition that it can be opened when the pressure reducing mechanism 213 is activated. Specifically, the depth of the first groove 102 is related to the dimensions of the pressure reducing mechanism 213. In one embodiment of the present application, the depth of the first groove 102 is greater than 1 mm. For example, the depth of the first groove 102 may be 3 mm or greater to make it easier to open the pressure reducing mechanism 213. The area of ​​the opening of the first groove 102 is also related to the area of ​​the pressure reducing mechanism 213. To open the pressure reducing mechanism 213, the ratio of the area of ​​the opening of the first groove 102 to the area of ​​the pressure reducing mechanism 213 must be greater than a predetermined value. For example, the ratio of the area of ​​the opening of the first groove 102 to the area of ​​the pressure reducing mechanism 213 may be in the range of 0.5 to 2.

[0154] It should be understood that in some embodiments, the first groove 102 may be stepped, in which case the opening of the first groove 102 can be considered to be an opening formed by the connection portion between the connecting wall 146 and the second assembly wall 145.

[0155] Optionally, in some embodiments, the assembly member 13 may be a thermal management member for containing a fluid to regulate the temperature of the battery cell 20. When cooling the battery cell 20, the thermal management member may contain a cooling medium to regulate the temperature of the battery cell 20, in which case the thermal management member may be referred to as a cooling component, a cooling system, a cooling plate, or the like. Note that the thermal management member may also be used for heating, and the embodiments of the present application are not limited thereto.

[0156] Optionally, the fluid may circulate to achieve a better temperature regulation effect. For example, the first heat conduction plate 131 and the second heat conduction plate 132 may form a flow path 133 for accommodating the fluid.

[0157] Optionally, the portion of the first heat conduction plate 131 that forms the flow path 133 may be provided with a fragile structure that is easily destroyed by the high-temperature, high-pressure discharge, such as a thinned portion, a notch, a fragile portion made of an easily damaged material, or a fragile portion made of a material with a low melting point. In this way, when the pressure reducing mechanism 213 is activated, the discharge from the battery cell 20 destroys the fragile structure provided in the first heat conduction plate 131, causing a cooling medium such as a coolant to flow out of the flow path 133, quickly reducing the temperature and pressure of the high-temperature, high-pressure discharge from the battery cell 20 and providing protection for components of the battery 10, such as other battery cells 20, that are not experiencing thermal runaway.

[0158] Optionally, in some embodiments, the battery 10 can further include a protective member 115, as shown in FIG. 15 . In this application, the protective member 115 refers to a member disposed on the side of the thermal management member away from the battery cells 20 to provide protection to the thermal management member and the battery cells 20. In some embodiments, the space between the protective member 115 and the thermal management member can be used to collect waste from the battery cells.

[0159] 16 and 17 show structural schematic diagrams of an insulating member provided according to an embodiment of the present application, where Fig. 16 shows a schematic three-sided view of the insulating member, and Fig. 17 shows a schematic perspective view of the insulating member at two different angles.

[0160] 16 and 17 , one or more first grooves 102 may be provided in the insulating member 14. Taking one of the first grooves 102 as an example, the first groove 102 may include a first groove bottom wall 143, a first groove side wall 142, and a first groove outer edge 141. The first groove bottom wall 143 can be used to close a first through hole 101 provided in the assembly member 13, the first groove side wall 142 can be used to cover the inner wall of the first through hole 101 to insulate and protect the inner wall of the first through hole 101, and the first groove outer edge 141 can be used to assemble to the assembly member 13.

[0161] More specifically, the outer edge 141 of the first groove 102 may include a first mounting wall 144, a second mounting wall 145, a connecting wall 146, and a flange structure 141b. The second mounting wall 145 is connected to the first mounting wall 144 via the connecting wall 146, and the edge of the second mounting wall 145 forms the flange structure 141b. Here, the first mounting wall 144 is used to mount to the first region 131a of the first thermal conduction plate 131, and the second mounting wall 145 is used to mount to the second region 131b of the first thermal conduction plate 131. The flange structure 141b is used to block adhesive from entering the first groove 102, preventing adhesive from being applied between the pressure reducing mechanism 213 and the insulating member 14.

[0162] In the embodiment shown in FIGS. 16 and 17 , the insulating member 14 is designed as a thin, elongated body, with a row of first grooves 102 recessed into each body. It is understood that the body and first grooves 102 of the insulating member 14 of the present application can have various different shapes depending on factors such as the shape and configuration of the pressure-reducing mechanism 213. Considering the weight energy density or volume energy density of the battery, the body of the insulating member 14 typically has a small thickness, and therefore can generally assume various thin or flake shapes. For example, the thickness of the insulating member 14 or the body of the insulating member 14 may be between 0.01 mm and 0.05 mm. The shape of the first grooves 102 may be, for example, an oval shape as shown in the figures, a circle, an ellipse, a square, or other shapes. When multiple first grooves 102 are provided in the body of one insulating member 14, the flange structures 141b corresponding to the multiple first grooves 102 may be integrally molded.

[0163] Alternatively, one insulating member 14 may be designed to have a single first groove 102, multiple rows of first grooves 102, or multiple first grooves 102 arranged in other ways in its body, as long as the arrangement and relative positions of the first grooves 102 are compatible with the installation positions of the pressure reducing mechanisms 213 of the battery cells 20 in the battery.

[0164] For example, when a plurality of first grooves 102 are provided on the main body of the insulating member 14, each of the plurality of first grooves 102 is aligned with a respective one of the pressure reducing mechanisms 213 (or aligned with the release region of the pressure reducing mechanism 213). This simplifies the process of assembling the insulating member 14 to the mounting member 13 and improves the efficiency of battery assembly. Furthermore, when the insulating member 14 is assembled in place, the flange structures 141b corresponding to the plurality of first grooves 102 can serve to isolate the adhesive from the pressure reducing mechanisms 213 of the plurality of battery cells 20.

[0165] It should be understood that the present application does not limit the arrangement direction and position of the pressure reducing mechanism 213 in the battery cell 20. In fact, regardless of whether the pressure reducing mechanism 213 is arranged at the bottom, top, or side of the battery cell 20, the related design of the insulating member 14 proposed by the present application can be appropriately applied, ensuring that the pressure reducing mechanism 213 performs its designed function of releasing high-temperature and high-pressure exhaust gas from within the battery cell when necessary, and playing a beneficial role in ensuring the safe use of the battery.

[0166] Alternatively, in one embodiment of the present application, the insulating member 14 can be manufactured from a thermoplastic material by a blister molding process, which helps to simplify the manufacturing process of the insulating member 14 and reduce costs.

[0167] Optionally, in one embodiment of the present application, foam or other material may be provided to block adhesive on the portion of the insulating member 14 where the flange structure 141b is not provided.

[0168] Fig. 18 is an exploded schematic view of a battery 10 according to one embodiment of the present application. In the embodiment shown in Fig. 18, the assembly member 13 is assembled to the housing 11 and can be assembled to the first wall 215 of the battery cell 20 via the first surface 13a. At least a portion of the insulating member 14 is attached to the inner wall of the first through-hole 101 provided in the assembly member 13. For detailed descriptions of each component of the battery 10, reference can be made to the above-described embodiments, and for the sake of brevity, the description thereof will be omitted here.

[0169] An embodiment of the present application further provides a power consumption device, which may include the battery 10 of any of the above-mentioned embodiments. Optionally, the power consumption device may be a vehicle 1, a ship, or a spacecraft.

[0170] The above describes the battery and power consumption device of the present application. Below, we will describe the battery manufacturing method and device of the present application. For parts not described in detail, please refer to the above-mentioned embodiments.

[0171] 19 is a schematic flowchart of a method 300 for manufacturing the battery 10 according to one embodiment of the present application. As shown in FIG. 19, the method 300 may include the following steps S310 to S340.

[0172] In S310, a battery cell 20 is provided.

[0173] The battery cell 20 includes a pressure reducing mechanism 213, which is provided on a first wall 215 of the battery cell 20, and is used to activate and release the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0174] In S320, an assembly member 13 is provided.

[0175] The first surface 13a of the assembly member 13 is assembled to the first wall 215, and the assembly member 13 is provided with a first through hole 101 corresponding to the position of the pressure reduction mechanism 213, and the first through hole 101 is used to allow emissions from the battery cell 20 to pass through the assembly member 13 when the pressure reduction mechanism 213 is activated.

[0176] In S330, an insulating member 14 is provided.

[0177] In S340, at least a portion of the insulating member 14 is attached to the inner wall 13b of the first through hole to insulate and protect the inner wall 13b of the first through hole.

[0178] 20 is a schematic block diagram of a manufacturing device 400 for the battery 10 according to one embodiment of the present application. As shown in FIG. 20, the device 400 includes: providing a battery cell (20) including a pressure reducing mechanism (213), the pressure reducing mechanism (213) being provided on a first wall (215) of the battery cell (20), the pressure reducing mechanism (213) being activated to release internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value; providing an assembly member (13), the assembly member (13) having a first surface (13a) assembled to a first wall (215) and a first through-hole (101) corresponding to the position of a pressure reducing mechanism (213) and through which discharged matter from the battery cell (20) passes through the assembly member (13) when the pressure reducing mechanism (213) is activated; providing an insulating member 14; a provision module 410 for use in and an attachment module (420) for attaching at least a portion of the insulating member (14) to the inner wall (13b) of the first through-hole in order to insulate and protect the inner wall (13b) of the first through-hole.

[0179] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and equivalents may be substituted for elements therein without departing from the scope of the present application. In particular, as long as there is no structural conflict, the respective technical features mentioned in each embodiment may be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims. [Explanation of symbols]

[0180] 1 vehicle 10 batteries 11. Housing 111 First Part 112 Second Part 13 Assembly parts 13a First Surface 101 first through hole 13b Inner wall of first through hole 13c Second groove 131 First heat conduction plate 132 Second heat conduction plate 133 Flow path 131a First Region 131b Second Area 14 Insulating material 102 First groove 141 Outer edge of first groove 141a Protrusion 141b flange structure 142 Side wall of first groove 143 Bottom wall of first groove 144 First Assembly Wall 145 Second Assembled Wall 146 Connecting Wall 103 Second through hole 104 Vulnerable areas 105 Groove 15 Adhesive 115 Protective materials 20 battery cells 21 Battery box 211 Housing 212 Lid plate 213 Pressure reducing mechanism 214 Electrode terminal 214a Positive electrode terminal 214b Negative electrode terminal 215 The First Wall 22 Electrode assembly 22a First Tab 22b Second Tab 23 Connecting member 24 Backing Plate 30 Controllers 40 Motor

Claims

1. a battery cell (20) including a pressure reducing mechanism (213) and an electrode terminal (214), wherein the pressure reducing mechanism (213) is provided on a first wall (215) of the battery cell (20) and is activated to release the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value, and the electrode terminal (214) is provided on a second wall of the battery cell (20), the second wall being different from the first wall (215); an assembly member (13), a first surface (13a) of the assembly member (13) assembled to the first wall (215), and a first through-hole (101) corresponding to the position of the pressure reduction mechanism (213) and through which waste from the battery cell (20) passes through the assembly member (13) when the pressure reduction mechanism (213) is activated; an insulating member (14) at least a portion of which is attached to the inner wall (13b) of the first through hole (101) to insulate and protect the inner wall (13b) of the first through hole (101); A battery (10) comprising:

2. The battery (10) of claim 1, characterized in that the insulating member (14) has a first groove (102), a side wall (142) of the first groove (102) is attached to the inner wall (13b) of the first through hole (101), and an outer edge (141) of the first groove (102) is assembled to the first surface (13a).

3. The battery (10) according to claim 2, characterized in that a second through-hole (103) is provided in the bottom wall (143) of the first groove (102) to allow exhaust from the battery cell (20) to pass through the insulating member (14) when the pressure reducing mechanism (213) is activated.

4. The bottom wall (143) of the first recessed groove (102) is used to close the first through hole (101); The battery (10) according to claim 2, characterized in that the bottom wall (143) of the first groove (102) is arranged so that it can be broken by the discharged matter when the pressure reducing mechanism (213) is activated, so that the discharged matter passes through the insulating member (14).

5. The battery (10) of claim 4, characterized in that a weakened area (104) is provided in the bottom wall (143) of the first groove (102), and the weakened area (104) is positioned so that it can be broken by the discharged material when the pressure reducing mechanism (213) is activated, so that the discharged material passes through the weakened area (104).

6. The weakened area (104) The melting point of the weakened area (104) is lower than that of other parts of the insulating member (14); The thickness of the weakened area (104) is smaller than that of other portions of the insulating member (14); The weakened area (104) is notched; 6. The battery (10) according to claim 5, wherein at least one of the following is satisfied:

7. the mounting member (13) is arranged to be mounted to the first wall (215) by adhesive; The battery (10) according to any one of claims 2 to 6, characterized in that the insulating member (14) is arranged to prevent the adhesive from being applied between the assembly member (13) and the pressure reducing mechanism (213).

8. the pressure reducing mechanism (213) has an operating region, and the pressure reducing mechanism (213) is arranged to form a release passage in the operating region for releasing the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value; The battery (10) of claim 7, wherein an outer edge (141) of the first groove (102) is positioned to surround at least the operating area to prevent the adhesive from entering the operating area.

9. The battery (10) according to claim 7 or 8, characterized in that the outer edge (141) of the first groove (102) is provided with a protrusion (141a) that protrudes from the first surface (13a) and is arranged to surround the pressure reduction mechanism (213), preventing the adhesive from being applied between the assembly member (13) and the pressure reduction mechanism (213).

10. The battery (10) according to claim 9, wherein the protrusion (141a) includes a flange structure (141b) formed by bending the outer edge (141) of the first groove (102).

11. The battery (10) according to claim 9 or 10, characterized in that the maximum height from the protrusion (141a) to the first surface (13a) is equal to or greater than a predetermined application height of the adhesive, and the battery cell (20) is arranged to be compressed to match the height of the adhesive when assembled to the assembly member (13).

12. a second groove (13c) is provided in the assembly member (13) so as to face the pressure reducing mechanism (213), and the first through hole (101) is provided in a bottom wall of the second groove (13c); The battery (10) according to any one of claims 2 to 11, characterized in that the outer edge (141) of the first groove (102) includes a first assembly wall (144) connected to a side wall (142) of the first groove (102), and the first assembly wall (144) is assembled to a bottom wall of the second groove (13c).

13. The assembly member (13) includes a first heat conduction plate (131) and a second heat conduction plate (132), the first heat conduction plate (131) is located between the first wall (215) and the second heat conduction plate (132) and is assembled to the first wall (215), a first region (131a) of the first heat conduction plate (131) is recessed into the second heat conduction plate (132) to form the second recessed groove (13c), the first region (131a) is connected to the second heat conduction plate (132), and the first through-hole (101) is provided in the first region (131a); 13. The battery (10) of claim 12, wherein the outer edge (141) of the first groove (102) further includes a second assembly wall (145) and a connecting wall (146), the second assembly wall (145) is connected to the first assembly wall (144) via the connecting wall (146), the first assembly wall (144) is assembled to the first region (131 a), the second assembly wall (145) is assembled to a second region (131 b) of the first heat conduction plate (131), and the second region (131 b) is used for assembly to the first wall (215).

14. The battery (10) of claim 13, characterized in that a gap is provided between the connecting wall (146) and the side wall of the second groove (13c), or the connecting wall (146) is attached to the side wall of the second groove (13c).

15. The battery (10) according to any one of claims 1 to 14, characterized in that the insulating member (14) is arranged to provide a space that allows the pressure reduction mechanism (213) to operate, and a relief cavity is formed between the insulating member (14) and the pressure reduction mechanism (213).

16. The battery (10) according to any one of claims 1 to 15, characterized in that an inner wall (13b) of the first through hole (101) is coated with an insulating material.

17. The battery (10) of any one of claims 1 to 16, wherein the assembly member (13) is a thermal management member for containing a fluid to regulate the temperature of the battery cell (20).

18. The battery (10) of any one of claims 1 to 17, wherein the first wall (215) is a bottom wall of the battery cell (20) and the second wall is a top wall of the battery cell (20).

19. An electrical power consuming device, characterized in that it comprises a battery (10) according to any one of claims 1 to 18 for providing electrical energy.

20. providing a battery cell (20) including a pressure reducing mechanism (213) and an electrode terminal (214), wherein the pressure reducing mechanism (213) is provided in a first wall (215) of the battery cell (20) and is activated to release the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value, and the electrode terminal (214) is provided in a second wall of the battery cell (20), the second wall being different from the first wall (215); providing an assembly member (13), wherein a first surface (13a) of the assembly member (13) is assembled to the first wall (215), and the assembly member (13) has a first through-hole (101) corresponding to the position of the pressure reduction mechanism (213) and through which discharged matter from the battery cell (20) passes through the assembly member (13) when the pressure reduction mechanism (213) is activated; Providing an insulating member (14); a step of attaching at least a portion of the insulating member (14) to the inner wall (13b) of the first through hole (101) to insulate and protect the inner wall (13b) of the first through hole (101); A method for manufacturing a battery, comprising:

21. a battery cell (20) including a pressure reducing mechanism (213) and an electrode terminal (214), wherein the pressure reducing mechanism (213) is provided in a first wall (215) of the battery cell (20) and is activated to release the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value, and the electrode terminal (214) is provided in a second wall of the battery cell (20), the second wall being different from the first wall (215); providing an assembly member (13), wherein a first surface (13a) of the assembly member (13) is assembled to the first wall (215), and the assembly member (13) is provided with a first through-hole (101) corresponding to the position of the pressure reduction mechanism (213), through which discharged matter from the battery cell (20) passes through the assembly member (13) when the pressure reduction mechanism (213) is activated; Providing an insulating member (14); a providing module used in an attachment module for attaching at least a portion of the insulating member (14) to the inner wall (13b) of the first through hole (101) to insulate and protect the inner wall (13b) of the first through hole (101); 1. A battery manufacturing device comprising:

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