Batteries, power consuming devices, battery manufacturing methods and devices

Abstract

The embodiments of the present application provide a battery, a power consumption device, and a manufacturing method and device for a battery. The battery includes a battery cell including a pressure reducing mechanism, the pressure reducing 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, an assembly member, a first surface of the assembly member being assembled to the first wall, and a first through hole corresponding to the position of the pressure reducing mechanism is provided through which waste from the battery cell passes through the assembly member when the pressure reducing mechanism is activated, and an insulating member, at least a part 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. The above technical solution can improve the safety of the battery.

Description

[Technical field]

[0001] The present 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 saving and emission reduction are the keys to the sustainable development of the automotive industry. In this context, electric vehicles have become an important part 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 the battery, safety issues have also become an issue that cannot be ignored. If the safety issues of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to improve the safety of the battery has become a technical issue that must be solved 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, a battery is provided, which includes: 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 an internal pressure or temperature of the battery cell reaches a threshold value; an assembly member, a first surface of the assembly member being assembled to the first wall and having a first through hole corresponding to the position of the pressure reduction mechanism and 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 affixed 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, the assembly member is provided with a first through hole, and at least a part of the insulating member is attached to the inner wall of the first through hole. In this way, the inner wall of the first through hole can be insulated and protected, improving the insulation of the assembly member, and preventing the battery cell from directly contacting the inner wall of the first through hole and causing a short circuit. Therefore, the safety risk can be reduced and the safety of the battery can be improved. In addition, the first surface of the assembly member is assembled to the first wall provided with a pressure reducing mechanism, and when the pressure reducing mechanism is activated, the discharged material of the battery cell is discharged to the first through hole. The discharged material is quickly discharged through the assembly member through the first through hole and away from the battery cell, reducing the risk and improving the safety of the battery.

[0007] In some possible embodiments, the insulating member has a first groove, a side wall of the first groove is fitted into the first through hole, and an 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 allowing the insulating member to be easily and stably fixed to the assembly member, thereby improving the assembly efficiency of the battery.

[0009] In some possible embodiments, a second through hole is provided in a bottom wall of the first groove to allow exhaust 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 exhaust material from the battery cell is quickly discharged away from the battery cell through the second through hole, thereby reducing the risk of the exhaust material being discharged and improving the safety of the battery.

[0011] In some possible embodiments, a 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 reduction 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 reduction mechanism is located and affecting the pressure reduction performance of the pressure reduction mechanism. When the pressure reduction mechanism is operating, the bottom wall of the first groove is easily damaged by the discharged matter so that the discharged matter can smoothly pass through the insulating member and be discharged outside the battery cell.

[0013] In some possible embodiments, a weakened area is provided in a bottom wall of the first groove, the weakened area being positioned so that it can be broken by the exhaust upon operation of the pressure reducing mechanism so that the exhaust 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 from 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 other portions of the insulating member; the thickness of the weakened area is smaller than other portions of the insulating member; and a notch is provided in the weakened area.

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

[0017] In some possible embodiments, the mounting member is arranged to be mounted to the first wall by an adhesive, and the insulating member is arranged to prevent the adhesive from being applied between the mounting 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 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 for releasing the internal pressure in the operating area 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, and can prevent the adhesive from flowing into the operating area from any direction and causing any disruption or adverse effects on the operation of the pressure reducing mechanism. This more reliably prevents the adhesive from interfering with the normal operation of the pressure reducing mechanism, and also prevents the adhesive from flowing in and blocking the discharge passage, which in turn blocks the discharge of waste from the battery cell. 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 and prevent the adhesive from being applied between the assembly member and the pressure reduction mechanism.

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

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

[0024] Providing the edge of the insulating member as 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 reduction mechanism during the battery manufacturing process.

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

[0026] This arrangement ensures that the protrusion can effectively prevent adhesive from being applied between the assembly member and the pressure reducing mechanism, and the insulating member does not affect 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 mounting 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 mounting wall connected to a side wall of the first groove, and the first mounting wall is mounted 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 reduction mechanism, thereby providing a buffer space for the discharged material from the battery cell, reducing the impact pressure on external structures or components caused by the discharged material from the battery cell, and further improving the safety performance of the battery.

[0029] In some possible embodiments, the assembly member includes a first heat conductive plate and a second heat conductive plate, the first heat conductive plate is located between the first wall and the second heat conductive plate and assembled to the first wall, a first region of the first heat conductive plate is recessed into the second heat conductive plate to form the second groove, the first region is connected to the second heat conductive 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 conductive 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 to allow operation of the pressure reducing mechanism, forming a relief cavity 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 deforms and bursts towards the mounting member.

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

[0034] The insulating material and the 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 a 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, a method for manufacturing a battery is provided, 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 an internal pressure or temperature of the battery cell reaches a threshold value; providing an assembly member, the first surface of the assembly member being assembled to the first wall and having a first through hole corresponding to the position of the pressure reduction mechanism and through which waste from the battery cell passes through the assembly member when the pressure reduction mechanism is activated; providing an insulating member; and attaching at least a portion of the insulating member to an 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 apparatus 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 an internal pressure or temperature of the battery cell reaches a threshold value; providing an assembly member, the first surface of the assembly member being 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 an inner wall of the first through hole to insulate and protect the inner wall of the first through hole. [Brief description 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 are 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 creative labor. [Figure 1] 1 is a structural schematic diagram of a vehicle disclosed in an embodiment of the present application. [Diagram 2] FIG. 1 is an exploded structural schematic diagram of a battery disclosed in an embodiment of the present application. [Diagram 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. [Diagram 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 a local structure of a battery disclosed in another embodiment of the present application. [Figure 7] FIG. 2 is a schematic diagram of a local structure of a battery disclosed in another embodiment of the present application. [Figure 8] FIG. 2 is a schematic diagram of a local structure of a battery disclosed in another embodiment of the present application. [Figure 9] FIG. 2 is a schematic diagram of a local structure of a battery disclosed in another embodiment of the present application. [Figure 10] FIG. 2 is a schematic diagram of a local structure of a battery disclosed in another embodiment of the present application. [Figure 11] FIG. 2 is a schematic diagram of a local structure of a battery disclosed in another embodiment of the present application. [Figure 12] FIG. 2 is a schematic diagram of a 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] FIG. 1 is an exploded schematic view of a battery disclosed in one embodiment of the present application. [Figure 19] 1 is a schematic flow chart of a method for manufacturing a battery according to an 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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 exemplarily explain 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 explained that unless otherwise specified, the meaning of "plurality" is two or more (including two). The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc., is merely for the purpose of facilitating or simplifying the description of this application, and does not indicate or suggest that the indicated device or element necessarily has a particular orientation or is constructed or operated in a particular orientation, and should not be understood as limiting this application. In addition, terms such as "first", "second", "third", etc., are merely for explanation, and should not be understood as indicating or suggesting relative importance. "Perpendicular" is not perpendicular in the strict sense, but is within a margin of error. "Parallel" is not parallel in the strict sense, but is within a margin of error.

[0042] The directional terms used in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. In the description of the present application, it should be further explained that unless otherwise clearly specified and limited, the terms "attach", "connect" and "connect" should be understood in a broad sense, for example, they may be fixed connection, detachable connection, or integral connection, and may be direct connection or indirect connection through 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 situation.

[0043] The term "and / or" in this application is simply a relational relationship describing related objects, and indicates that three relations 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 those skilled in the art in the field of the present application, and the terms used in the application specification are merely intended to describe specific embodiments and are not intended to limit the present application. The terms "comprise" and "have" and any variations thereof in the specification, claims and the above brief description of the drawings of the present application are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above brief description of the drawings are intended to distinguish different objects and are not intended to describe a specific order or subordinate relationship.

[0045] Reference to an "embodiment" in this application 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 of other embodiments. As will be understood, either 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, a 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] The 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 is mainly operated by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is applied to the surface of the positive electrode collector, and the positive electrode collector without the positive electrode active material layer protrudes from the positive electrode collector with the positive electrode active material layer applied, and the positive electrode collector without the positive electrode active material layer is called a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode collector, the negative electrode collector not coated with the negative electrode active material layer protruding from the negative electrode collector coated with the negative electrode active material layer, and the negative electrode collector not coated with the negative electrode active material layer is called a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current flows without melting, the number of positive electrode tabs is multiple and stacked, and the number of negative electrode tabs is multiple and stacked. The material of the separator may be polypropylene (PP) or polyethylene (PE), etc. In addition, the electrode assembly may be a wound structure or a stacked structure, and the embodiment of the present application 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, bus bar 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 according to the multiple battery cells to be housed. In some embodiments, the housing may be rectangular with six walls.

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

[0051] The thermal management member referred to in the present application is used to contain a fluid to adjust the temperature of the battery cells. The fluid here may be a liquid or a gas, and adjusting the temperature refers to heating or cooling the 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 battery cells. In this case, the thermal management member may be called a cooling member, a cooling system, a cooling plate, etc., and the fluid contained therein may be called a cooling medium or a cooling fluid, more specifically, a cooling liquid or a cooling gas. The thermal management member may be used to heat the battery cells to increase their temperature, and the embodiment of the present application is not limited thereto. Optionally, the fluid may circulate to achieve a better temperature adjustment effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, air, etc.

[0052] In some battery packaging techniques, multiple battery cells can be integrated into a battery module first, 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, and such battery packaging techniques may be called cell-to-pack (CTP) packaging techniques. In the CTP packaging technique, the intermediate state of the battery module is omitted, so that the mass of the battery pack can be reduced and the energy density of the battery can be increased. That is, in the battery packaging process, multiple battery cells can directly form a battery, or a battery module can be first formed and then a battery can be formed by the battery module. The battery is further provided 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 simultaneously considered, and furthermore, the safety of the battery must also be taken into consideration.

[0054] In battery cells, the main safety hazards come from the charging and discharging process, and it is necessary to design an appropriate environmental temperature to avoid the hazards. In order to effectively avoid unnecessary losses, at least three protective measures are generally taken for battery cells. Specifically, the protective measures include at least a switching element, the selection of an appropriate separator material, and a pressure reduction mechanism. The switching element is an element that can stop charging or discharging the battery when the temperature or resistance in the battery cell reaches a certain threshold. The separator is used to isolate the positive and negative plates, and the micropores on the separator, which are on the order of microns (and even nanometers), can be automatically dissolved when the temperature rises to a certain value, so that the metal ions cannot pass through the separator and the internal reaction of the battery cell is terminated.

[0055] The pressure reducing mechanism provided in the battery cell refers to an element or member that operates to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. This threshold is designed to be different according to design requirements. The threshold may depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte, and the separator in the battery cell. The pressure reducing mechanism provided in the battery cell may adopt the form of, for example, an explosion-proof valve, an air valve, a pressure reducing valve, or a safety valve, and may specifically adopt a pressure-sensitive 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 performs an operation, or the fragile structure provided in the pressure reducing mechanism is broken to form an opening or passage that can release the internal pressure or temperature.

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

[0057] As referred to in this application, "operation" means that the pressure relief mechanism operates or is activated to a certain state so that the internal pressure and temperature of the battery cell are released. The operation by the pressure relief mechanism may include, but is not limited to, rupturing, crushing, tearing, opening, etc. of at least a portion of the pressure relief mechanism. When the pressure relief mechanism operates, the high temperature and high pressure material inside the battery cell is discharged from the operating portion as a discharge. In this way, the battery cell can be depressurized in a situation where the pressure or temperature is controllable, and the possibility of a more serious accident occurring can be avoided.

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

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

[0060] In current insulation design proposals, insulation between the conductors and the battery cells is generally achieved by applying insulating materials to the surfaces of the conductors around the battery cells. However, in practical applications, some conductor members are provided with holes according to design requirements, but the current insulation design does not consider the insulation protection for the inner walls of the holes. The battery is mounted on a power consuming device, for example, a vehicle. The movement of the power consuming device, such as a vehicle, will give the battery a certain shock. In order to fully utilize the space inside the battery, the design inside the battery is compact, and the distance between the members is very small. The shock given to the battery by the power consuming device may cause the inner walls of the holes, which lack insulation protection of the conductors, to contact the case of the battery cell, which may cause a short circuit of the battery, thus presenting a safety risk.

[0061] In view of this, the present application provides a technical solution for insulating and protecting a first through hole provided in an assembly member that is assembled to a battery cell by an insulating member in order to improve the safety of the battery. More specifically, in order to insulate and protect the inner wall of the first through hole, at least a part of the insulating member is attached to the inner wall of the first through hole. In this way, the insulation of the assembly member is 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 above-mentioned devices, but also to all devices that use batteries. However, for the sake of simplicity, the following embodiments are all described using electric vehicles as an example.

[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 numbers in previous drawings will be referenced in the description of some embodiments, but it should be noted that all of these reference numbers may not be shown in the drawings corresponding to the embodiments of this portion.

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

[0066] In order to meet different needs during power usage, a battery may include multiple battery cells, and the multiple battery cells may be connected in series, parallel, or series-parallel, where series-parallel connection refers to a mixture of series and parallel connections. The battery may also be called a battery pack. Alternatively, multiple battery cells may be connected in series, parallel, or series-parallel to form a battery module, and then multiple battery modules may be connected in series, parallel, or series-parallel to form a battery. That is, multiple battery cells may directly form a battery, or a battery module may be formed first, and then a battery may be formed from the battery module.

[0067] For example, as shown in FIG. 2, this 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 (or called a cover) 11, the inside of which is a hollow structure, and the plurality of battery cells 20 are accommodated in the housing 11. Exemplarily, referring to FIG. 2, the housing 11 may include two parts, here called a first part 111 and a second part 112, respectively, and the first part 111 and the second part 112 are engaged with each other to form an accommodation space for accommodating 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 one opening. For example, the first part 111 and the second part 112 may both be hollow rectangular parallelepipeds, each having 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. The multiple battery cells 20 are combined by being connected in parallel, in series, or in series-parallel to each other, and then disposed 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 integrated into at least one battery module first, 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 mounting stability of the battery modules in the housing 11.

[0069] Alternatively, in another embodiment, a plurality of battery cells 20 can be directly connected to each other and attached to the housing 11 to form a battery pack. Since the intermediate state of the battery module is omitted, it is not necessary to provide an auxiliary structure such as a cross beam on the housing 11, and the weight of the battery 10 can be reduced and the energy density of the battery 10 can be increased. This embodiment may be referred to as a cell to pack (CTP) attachment technique in the related art.

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

[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 a bus bar member for realizing an electrical connection between the multiple battery cells 20, for example, a parallel connection, a series connection, or a series-parallel connection. Specifically, the bus bar member can realize an electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the bus bar member can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of 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 bus bar member.

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

[0073] 3, which is a structural schematic diagram of a battery cell 20 according to an 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] 3, the battery box 21 may include a housing 211 and a cover plate 212. The wall of the housing 211 and the cover plate 212 are both referred to as the wall of the battery cell 20. The housing 211 is determined according to the shape after one or more electrode assemblies 22 are combined, and 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, when the housing 211 is a hollow rectangular parallelepiped or cube, one plane of the housing 211 may be an open surface, that is, the plane does not have a wall, thereby communicating the inside and outside of the housing 211. When the housing 211 is a hollow cylinder, an end surface of the housing 211 may be an open surface, that is, the end surface does not have a wall, thereby communicating 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 two cover plates, the first cover plate and the second cover plate, respectively, and the embodiment of the present application is not limited thereto.

[0077] The cover plate 212 is generally flat, and two electrode terminals 214 are fixed to the flat surface of the cover plate 212. The two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member 23. The connecting member 23 may be called a current collecting member 23. The connecting member 23 is located between the cover plate 212 and the electrode assembly 22 and is used to realize an electrical connection between the electrode assembly 22 and the electrode terminal 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, when 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] As shown in Fig. 4, this is a structural schematic diagram of a battery cell 20 according to another embodiment of the present application. 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 a 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 a one-piece molding process between the first wall 215 and the remaining part of the housing 211, or the first wall 215 may be formed by closing an opening in the remaining part of the housing 211. For ease of explanation, the first wall 215 is separated from the housing 211 in FIG. 4, but this is not limited to the housing 211 having an opening on its bottom side.

[0083] The pressure reducing 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 is fixed to the wall where it is located by, for example, welding. For example, in the embodiment shown in FIG. 4, when the pressure reducing mechanism 213 is a part of the first wall 215, the pressure reducing mechanism 213 may be formed by providing 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 area of ​​the pressure reducing mechanism 213 excluding the notch. The notch is the most vulnerable position of the pressure reducing mechanism 213. When there is too much gas from the battery cell 20 and the internal pressure of the housing 211 rises to a threshold value, or when the internal temperature of the battery cell 20 rises to a threshold value due to the reaction inside the battery cell 20 and heat is generated, the pressure reducing mechanism 213 can burst at the notch to communicate the inside and outside of the housing 211, and the pressure and temperature of the gas are released to the outside by the bursting of the pressure reducing mechanism 213, and the explosion of the battery cell 20 is further avoided.

[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 reduction 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 reduction mechanism 213 and the electrode terminal 214 can be facilitated, which helps to 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, and the second wall is different from the first wall 215. Exemplarily, 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 to 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, excluding 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, the discharged material of the battery cell 20 is moved further away from the electrode terminal 214, and the impact of the discharged material on the electrode terminal 214 and the bus bar member can be reduced, thereby improving the safety of the battery. Furthermore, when the electrode terminal 214 is provided on the cover plate 212 of the battery cell 20, by providing the pressure reducing mechanism 213 on the bottom wall of the battery cell 20, when the pressure reducing mechanism 213 is activated, the discharged material of the battery cell 20 is discharged to the bottom of the battery 10. In this way, the risk of discharged material can be reduced by utilizing a thermal management member or the like on the bottom of the battery 10, while the bottom of the battery 10 is moved away from the normal user, thereby reducing damage to the user.

[0088] 4, the battery cell 20 may further include a backing plate 24, which is located between the electrode assembly 22 and the bottom wall of the housing 211 and serves to support the electrode assembly 22, and may effectively prevent interference between the electrode assembly 22 and the fillet around the bottom wall of the housing 211. The backing plate 24 may have one or more through holes, for example, a plurality of uniformly arranged through holes, or when the pressure reducing mechanism 213 is provided on the bottom wall of the housing 211, a through hole may be provided corresponding to the position of 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, and all the gas and electrolyte generated inside the battery cell 20 may freely pass 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 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 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 the pressure reducing mechanism 213 is used to operate and 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 reduction mechanism 213, and the first through-hole 101 is used to allow waste from the battery cell 20 to pass through the assembly member 13 when the pressure reduction mechanism 213 is operating.

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

[0094] In the embodiment of the present application, the assembly member 13 is provided with a first through hole 101, and at least a part 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, improve the insulation of the assembly member 13, and prevent the battery cell 20 from directly contacting the inner wall 13b of the first through hole and causing a short circuit. Therefore, the safety risk can be reduced and the safety of the battery can be improved. In addition, the first surface 13a of the assembly member 13 is assembled to the first wall 215 provided with the pressure reducing mechanism 213, and when the pressure reducing mechanism 213 is operated, the discharged matter of the battery cell 20 is discharged to the first through hole 101. The discharged matter passes through the assembly member 13 via the first through hole 101 and is quickly discharged away from the battery cell 20, so that the risk can be reduced and the safety of the battery can be improved.

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

[0096] In the embodiment of the present application, it is understood 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 gluing, riveting, locking, interference fitting, 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 against 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 prism, a cube, a triangular prism, a square pyramid, a truncated cone, or other shapes, but the embodiments of the present application are not limited thereto.

[0100] Optionally, in one embodiment of the present application, as shown in Fig. 5, the insulating member 14 may be a hollow column, and the outer surface of the side wall of the hollow column is 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, thus firmly connecting the insulating member 14 and the assembly member 13 and realizing the 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 fits 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 can be a hollow column, and if the first through hole 101 is cubic, the insulating member 14 can 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, 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 includes a first sub-part and a second sub-part, and the second sub-part is recessed from the first sub-part in a direction away from the pressure reducing mechanism 213 to form a first groove 102. The first sub-part can be considered as an outer edge 141 of the first groove, and a portion of the second sub-part parallel to (or assembled with) the inner wall 13b of the first through-hole 101 can be considered as a side wall 142 of the first groove. Optionally, in some embodiments, a portion of the second sub-part corresponding to the position of the first through-hole 101 can be considered as a bottom wall 143 of the first groove, in case there may be a portion covering (or blocking) the first through-hole 101 after the second sub-part is recessed. 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, it is understood that the side wall 142 of the first groove is fitted into the first through hole 101 means that at least a part of the side wall 142 of the first groove is fitted into the first through hole 101. The outer edge 141 of the first groove is assembled to the first surface 13a means that at least a part 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 exhaust 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 reduction mechanism 213 is activated, the exhaust 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 from 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, bottom wall 143 of the first groove can isolate pressure reduction mechanism 213 so that the space in which pressure reduction mechanism 213 is located does not communicate with the outside, and can prevent foreign matter such as aluminum chips inside housing 11 from entering the space in which pressure reduction mechanism 213 is located through first through-hole 101. This prevents problems such as insulation failure of the battery cell and destruction of the pressure reduction mechanism of the battery cell by foreign matter, and can avoid the occurrence of further safety problems.

[0111] Optionally, in order to facilitate the passage of the exhaust material through the insulating member 14, in some embodiments, the bottom wall 143 of the first groove is disposed so as to be broken by the exhaust material when the pressure reducing mechanism 213 is operated, so that the exhaust material passes through the insulating member 14. That is, when the pressure reducing mechanism 213 is not operated, 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 operated, the bottom wall 143 of the first groove is easily broken by the exhaust material, so that the exhaust material can smoothly pass through the insulating member 14 and be discharged outside the battery cell 20.

[0112] 8, a weakened area 104 may be provided on the bottom wall 143 of the first groove, and the weakened area 104 is arranged so that it can be broken by the discharged matter when the pressure reducing mechanism 213 is operated so that the discharged matter 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 discharged matter of the battery cell 20, which helps to quickly reduce the pressure of 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 discharged material can directly impact the weakened area 104, causing the weakened area 104 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 examples.

[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 decompression 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 material used for the weakened region 104 has a melting point 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 portions of the bottom wall 143 of the first 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 decompression mechanism 213, and the bottom wall of the groove 105 forms a weakened area 104. That is, the thickness of the weakened area 104 is smaller than other parts of the insulating member 14. For example, the thickness of the weakened area 104 is 3 mm or less. For further example, the thickness of the weakened area 104 may be 1 mm or less. The thickness of the weakened area 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 exhaust, when the pressure reducing mechanism 213 is activated, the exhaust can destroy the bottom wall of the groove 105 and pass through the insulating member 14.

[0119] Optionally, the groove 105 is provided on a surface of the bottom wall 143 of the first groove that faces 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, the bottom wall 143 of the first groove is provided with a cut to form the weakened area 104. For example, the bottom wall 143 of the first groove may be provided with a cross-shaped cut, a square-shaped cut, a square-shaped cut, etc.

[0123] Since the thickness of the bottom wall 143 of the first groove corresponding to the notch is smaller than the thickness of the other area of ​​the bottom wall 143 of the first groove excluding the notch, the notch is the weakest position of the bottom wall 143 of the first groove. When the pressure reducing mechanism 213 operates, the discharged material can burst the bottom wall 143 of the first groove at the notch. Therefore, the discharged material 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 adopt at least two of the following methods simultaneously: 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, in the embodiment of the present application, as shown in Figures 6 to 9, 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 can not only insulate and protect the inner wall 13b of the first through hole provided in the assembly member 13, but also effectively prevent the adhesive 15 applied between the assembly member 13 and the pressure reduction mechanism 213 from hindering or affecting the operating performance of the pressure reduction mechanism 213 during the battery manufacturing process. In addition, the efficiency and accuracy of application of the adhesive 15 can be improved, and the manufacturing efficiency of the battery can be improved.

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

[0128] The discharge passage formed in the operating area when the pressure reducing mechanism 213 is operated guides the exhaust of the battery cell 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, and can prevent the adhesive 15 from flowing into the operating area from any direction, thereby preventing any interference or adverse effect on the execution of the operation of the pressure reducing mechanism 213. This more reliably prevents the adhesive 15 from interfering with the normal operation of the pressure reducing mechanism 213, and can also prevent the adhesive 15 from flowing in and blocking the discharge passage, which further blocks the discharge of the exhaust released from the battery cell 20. This can further improve the safety performance of the battery.

[0129] In the embodiment of the present application, the insulating member 14 may adopt various possible structures so as to isolate the adhesive 15 used for assembling the battery cell 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 the space into which the adhesive 15 flows and affects the pressure reduction mechanism 213 from performing its designed pressure reduction function. For example, the insulating member 14 may be designed as a part of the area surrounding the pressure reduction mechanism 213 (which may be called an operating area or a release area) that can form a release passage for releasing the internal pressure of the battery cell 20 when the pressure reduction mechanism 213 is operated and allow the discharged matter to 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 the space provided by the assembly member 13 to enable the operation of the pressure reduction mechanism 213.

[0130] In some embodiments, the insulating member 14 can be assembled in the area of ​​the assembly member 13 corresponding to the pressure reducing mechanism 213 before applying the adhesive 15. It should be noted that any member in the battery that is bonded to the battery cell 20 by the adhesive 15 can be considered as belonging to or part of the assembly member, and any of these members can use the insulating member 14, i.e., the insulating member 14 can be assembled thereon before applying the adhesive 15. In this way, when applying the adhesive 15, the insulating member 14 can prevent the adhesive 15 from entering the area of ​​the assembly member 13 corresponding to the pressure reducing mechanism 213, especially the area of ​​the pressure reducing mechanism 213 that operates to form a release passage to release the internal pressure of the battery cell 20 and allow the exhaust to flow out, so as to ensure that the pressure reducing mechanism 213 can operate and normally realize its designed mechanism. In addition, by adopting the insulating member 14, there is no need to worry about the adhesive 15 being applied to the area related to the operation of the pressure reducing mechanism 213, which can improve the application speed and accuracy of the adhesive 15 and save 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 is arranged to protrude from the first surface 13a and surround the pressure reduction mechanism 213, and the protrusion 141a is used to prevent the adhesive 15 from being applied between the assembly member 13 and the pressure reduction mechanism 213.

[0132] With this arrangement, it is possible to simply and effectively prevent the adhesive 15 from being applied to the surface of the pressure reduction mechanism 213 during the battery manufacturing process, and to prevent interference with the operation of the pressure reduction mechanism 213.

[0133] Exemplarily, the outer edge 141 of the first groove may include a main body and a protrusion 141a. The main body is used to be assembled or attached to 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., toward the battery cell 20. The protrusion 141a is provided to surround the pressure reducing mechanism 213, and for example, the protrusion 141a may have a ring 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] Providing the edge of the insulating member 14 as the flange structure 141b not only facilitates processing and forming of the insulating member 14, but 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 realize 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. With reference to the schematic diagram of the state before the battery cell 20 and the assembly member 13 are assembled shown in Fig. 11(a), the height between the flange structure 141b and the first surface 13a may gradually increase along 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 along 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 receiving a 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 portion of the flange structure 141b that contacts the battery cell 20 and the first surface 13a can be maintained unchanged along the direction away from the center line of the first through hole 101, and the height between the portion of the flange structure 141b that does not contact the battery cell 20 and the first surface 13a can be gradually increased along the direction away from the center line of the first through hole 101.

[0139] Optionally, in an embodiment of the present application, the maximum height from the protrusion 141a to the first surface 13a is greater than or equal to a predetermined application height of the adhesive 15, and is arranged to be compressed to match the height of the adhesive 15 when the battery cell 20 is assembled to the mounting 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 a 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] By disposing in this manner, it can be ensured that the protrusion 141a can effectively prevent the adhesive 15 from being applied between the assembly member 13 and the pressure reducing mechanism 213. Moreover, the insulating member 14 does not affect the reliable adhesion between the assembly member 13 and the pressure reducing mechanism 213 and the operation of the pressure reducing mechanism 213. Moreover, when the battery cell 20 and the assembly member 13 are crimped or joined by the adhesive 15, the protrusion 141a can be compressed to a height that matches the adhesive 15, so that the protrusion 141a does not leave any gap between the adhesive surfaces of the battery cell 20 and the assembly member 13, and it can be more reliably ensured that the adhesive 15 is isolated from the area where the pressure reducing mechanism 213 operates to form a passage for exhaust.

[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 mounting member 13 is provided with a second groove 13c opposed to the pressure reducing mechanism 213, and a first through hole 101 is provided in a bottom wall of the second groove 13c. An outer edge 141 of the first groove includes a first mounting wall 144 connected to a side wall 142 of the first groove, and the first mounting wall 144 is mounted to the bottom wall of the second groove 13c.

[0144] In the embodiment of the present application, a second groove 13c is provided in the mounting member 13 opposite the pressure reducing mechanism 213, thereby providing a buffer space for the discharged material of the battery cell 20, thereby reducing the impact pressure on external structures or components caused by the discharged material of 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 other 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 other 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 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 conductive plate 131 and a second heat conductive plate 132. The first heat conductive plate 131 is located between the first wall 215 and the second heat conductive plate 132, and is assembled to the first wall 215. A first region 131a of the first heat conductive plate 131 is recessed into the second heat conductive plate 132 to form a second recessed groove 13c. The first region 131a is connected to the second heat conductive 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. The first through hole 101 can be blocked by the bottom wall 143 of the first groove 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] Optionally, in some embodiments, a gap may be provided between the connecting wall 146 and the side wall of the second groove 13c, or the connecting wall 146 may be attached to the side wall of the second groove 13c. Specifically, it 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 an escape cavity is formed between the insulating member 14 and the pressure reducing mechanism 213. The escape 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 bursts. Specifically, the escape cavity can be a sealed cavity or a non-sealed cavity formed by being surrounded by both the insulating member 14 and the pressure reducing mechanism 213. Exemplarily, the first recessed groove 102 introduced previously can be arranged as an escape cavity that can be opened when the pressure reducing mechanism 213 operates.

[0153] When the first groove 102 is an escape cavity, the setting of the first groove 102 must satisfy the condition that the first groove 102 can be opened when the pressure reducing mechanism 213 is operated. Specifically, the depth of the first groove 102 is related to the size 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 more so that the pressure reducing mechanism 213 can be more easily opened. The area of ​​the opening of the first groove 102 is also related to the area of ​​the pressure reducing mechanism 213. In order 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 range of the ratio of the area of ​​the opening of the first groove 102 to the area of ​​the pressure reducing mechanism 213 may be 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 may be considered to be an opening formed by the connection portion of the connecting wall 146 and the second assembly wall 145.

[0155] Optionally, in some embodiments, the mounting member 13 may be a thermal management member for containing a fluid to adjust the temperature of the battery cell 20. When cooling the battery cell 20, the thermal management member may contain a cooling medium to adjust the temperature of the battery cell 20, in which case the thermal management member may be called 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 conductive plate 131 and the second heat conductive plate 132 may form a flow path 133 for receiving the fluid.

[0157] Alternatively, the portion of the first heat conductive plate 131 for forming the flow passage 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 cut, 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 operates, the discharge from the battery cell 20 destroys the fragile structure provided in the first heat conductive plate 131, causing a cooling medium such as a coolant in the flow passage 133 to flow out, quickly reducing the temperature and pressure of the high-temperature, high-pressure discharge from the battery cell 20, and providing a protective effect for components such as other battery cells 20 in the battery 10 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 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 battery cell waste.

[0159] 16 and 17 are structural schematic diagrams of an insulating member provided by an embodiment of the present application. Fig. 16 shows a schematic three-sided view of the insulating member, and Fig. 17 shows a 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 bottom wall 143 of the first groove, a side wall 142 of the first groove, and an outer edge 141 of the first groove. The bottom wall 143 of the first groove can be used to close the first through hole 101 provided in the assembly member 13, the side wall 142 of the first groove can be used to attach to the inner wall of the first through hole 101 to insulate and protect the inner wall of the first through hole 101, and the outer edge 141 of the first groove can be used to assemble to the assembly member 13.

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

[0162] In the embodiment shown in FIG. 16 and FIG. 17, the insulating member 14 is designed as a body having an elongated thin plate shape, and has a row of first grooves 102 recessed in each body. It is understood that the body and the 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 usually has a small thickness, so it can generally exhibit a thin film or flake shape of various 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 or a circular shape as shown in the figure, an ellipse shape, a square shape, etc. When a plurality of first grooves 102 are provided in the body of one insulating member 14, the flange structures 141b corresponding to the plurality of first grooves 102 may be integrally formed.

[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 another manner in its body, as long as the arrangement and relative positions of the first grooves 102 are suitable for 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 body of the insulating member 14, each of the plurality of first grooves 102 is aligned with one of the pressure reducing mechanisms 213 (or aligned with the release area of ​​the pressure reducing mechanism 213). This simplifies the process of assembling the insulating member 14 to the mounting member 13, and improves the assembly efficiency of the battery. In addition, when the insulating member 14 is assembled in a predetermined position, the flange structures 141b corresponding to the plurality of first grooves 102 can play a role in isolating 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, no matter where the pressure reducing mechanism 213 is arranged, such as 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 achieves its designed function to release high-temperature and high-pressure exhaust in the battery cell when necessary, and playing a beneficial role in ensuring the safe use of the battery.

[0166] Optionally, 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 the cost.

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

[0168] Fig. 18 is an exploded schematic diagram of a battery 10 according to an embodiment of the present application. In the embodiment shown in Fig. 18, the assembly member 13 can be assembled to the housing 11 and to the first wall 215 of the battery cell 20 via the first surface 13a. At least a part 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 member of the battery 10, reference can be made to the above-mentioned embodiments, and descriptions thereof will be omitted here for brevity.

[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 consuming device of the present application. Below, the manufacturing method and device of the battery of the present application will be described. For parts that are not described in detail, please refer to the above-mentioned embodiments.

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

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

[0173] The battery cell 20 includes a pressure reduction 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, a mounting member 13 is provided.

[0175] The first surface 13a of the mounting member 13 is mounted to the first wall 215, and the mounting 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 mounting 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 insulating member 14 is attached to inner wall 13b of the first through hole in order to insulate and protect inner wall 13b of the first through hole.

[0178] FIG. 20 is a schematic block diagram of a manufacturing device 400 for a battery 10 according to an 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 adapted to be activated to release internal pressure when an internal pressure or temperature of the battery cell 20 reaches a threshold; providing an assembly member 13, the assembly member 13 having a first surface 13a assembled to a first wall 215 and provided with a first through hole 101 corresponding to the position of a pressure reducing mechanism 213 and through which exhaust from a 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 the preferred embodiments, various modifications can be made thereto and equivalents can be substituted for the elements therein without departing from the scope of the present application. In particular, each technical feature mentioned in each embodiment can be combined in any manner, unless there is a conflict of structure. 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. Cabinet 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 conductive plate 132 Second heat conductive plate 133 Flow Path 131a First Area 131b Second Area 14 Insulating materials 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 Assembling Wall 146 Connecting Wall 103 Second through hole 104 Vulnerable areas 105 Groove 15. Glue 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 2nd tab 23 Connection parts 24 Backing Plate 30 Controller 40 Motor

Claims

1. A battery cell (20) including a pressure reducing mechanism (213), wherein the pressure reducing mechanism (213) is provided on a first wall (215) of the battery cell (20) and is used to operate when the internal pressure or temperature of the battery cell (20) reaches a threshold value to release the internal pressure. The battery cell (20), An assembling member (13), wherein a first surface (13a) of the assembling member (13) is assembled to the first wall (215), and a first through hole (101) is provided for the discharge from the battery cell (20) to pass through the assembling member (13) corresponding to the position of the pressure reducing mechanism (213) when the pressure reducing mechanism (213) operates. The assembling member (13), An insulating member (14) at least partially adhered to an inner wall (13b) of the first through hole (101) for insulating and protecting the inner wall (13b) of the first through hole (101), A battery (10) characterized by comprising the above.

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

3. The battery (10) according to claim 2, wherein a second through hole (103) is provided in a bottom wall (143) of the first concave groove (102) for the discharge from the battery cell (20) to pass through the insulating member (14) when the pressure reducing mechanism (213) operates.

4. The bottom wall (143) of the first concave groove (102) is used to block the first through hole (101), The battery (10) according to claim 2, wherein the bottom wall (143) of the first concave groove (102) is arranged to be destructible by the discharge when the pressure reducing mechanism (213) operates so that the discharge passes through the insulating member (14).

5. The battery (10) according to claim 4, wherein a fragile region (104) is provided in the bottom wall (143) of the first concave groove (102), and the fragile region (104) is arranged to be destructible by the discharge when the pressure reducing mechanism (213) operates so that the discharge passes through the fragile region (104).

6. The fragile region (104) is, the melting point of the fragile region (104) is lower than that of other parts of the insulating member (14); the thickness of the fragile region (104) is smaller than that of other parts of the insulating member (14); a notch is provided in the fragile region (104); The battery (10) according to claim 5, characterized by satisfying at least one of the above.

7. The assembling member (13) is arranged to be assembled to the first wall (215) by an adhesive, The insulating member (14) is arranged to prevent the adhesive from being applied between the assembling member (13) and the pressure reducing mechanism (213). The battery (10) according to any one of claims 2 to 6.

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

9. On the outer edge (141) of the first concave groove (102), a protrusion (141a) is provided which protrudes from the first surface (13a) and is arranged to surround the pressure reducing mechanism (213), for preventing the adhesive from being applied between the assembling member (13) and the pressure reducing mechanism (213). The battery (10) according to claim 7 or 8.

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

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

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

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 to form the second concave 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). The outer edge (141) of the first concave groove (102) further includes a second assembly wall (145) and a connection wall (146). The second assembly wall (145) is connected to the first assembly wall (144) through the connection wall (146). The first assembly wall (144) is assembled to the first region (131a). The second assembly wall (145) is assembled to a second region (131b) of the first heat conduction plate (131), and the second region (131b) is used for assembling to the first wall (215). The battery (10) according to claim 12, characterized in that

14. A gap is provided between the connection wall (146) and the side wall of the second concave groove (13c), or the connection wall (146) is adhered to the side wall of the second concave groove (13c). The battery (10) according to claim 13, characterized in that

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

16. The battery (10) according to any one of claims 1 to 15, wherein an insulating material is applied to the inner wall (13b) of the first through-hole (101).

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

18. An electric power consuming device comprising the battery (10) according to any one of claims 1 to 17 for providing electric energy.

19. A battery cell (20) including a pressure reducing mechanism (213), wherein the pressure reducing mechanism (213) is provided on a first wall (215) of the battery cell (20) and is used to operate when the internal pressure or temperature of the battery cell (20) reaches a threshold value to release the internal pressure, the step of providing the battery cell (20); An assembly member (13), wherein a first surface (13a) of the assembly member (13) is assembled to the first wall (215), and a first through-hole (101) for the discharge from the battery cell (20) to pass through the assembly member (13) during the operation of the pressure reducing mechanism (213) corresponding to the position of the pressure reducing mechanism (213) is provided, the step of providing the assembly member (13); The step of providing an insulating member (14); The step of adhering at least a part 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, characterized by including the above.

20. A battery cell (20) including a pressure reducing mechanism (213), wherein the pressure reducing mechanism (213) is provided on a first wall (215) of the battery cell (20) and is used to operate when the internal pressure or temperature of the battery cell (20) reaches a threshold value to release the internal pressure, providing the battery cell (20); An assembly member (13), wherein a first surface (13a) of the assembly member (13) is assembled to the first wall (215), and a first through-hole (101) for the discharge from the battery cell (20) to pass through the assembly member (13) during the operation of the pressure reducing mechanism (213) corresponding to the position of the pressure reducing mechanism (213) is provided, providing the assembly member (13); Providing an insulating member (14); A providing module used for the above. An attachment module for attaching at least a part of the insulating member (14) to the inner wall (13b) of the first through-hole (101) in order to insulate and protect the inner wall (13b) of the first through-hole (101); A battery manufacturing apparatus, characterized by including the above.

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