Batteries, power consumption devices, methods and equipment for manufacturing batteries

Abstract

To provide a battery with improved safety, a power consuming apparatus, a method of manufacturing the battery, and an apparatus.SOLUTION: The battery includes a battery cell 20 including a depressurizing mechanism 213, wherein the depressurizing mechanism is disposed on a first wall 215 of the battery cell and is configured to be operated when an internal pressure or a temperature of the battery cell reaches a threshold to release the internal pressure, an assembling member 13, wherein a first surface 13a of the assembling member is assembled to the first wall and a first through hole 101 is provided for the depressurizing mechanism to pass a discharge product from the battery cell when the depressurizing mechanism is operated, and an insulating member 14, wherein at least a part of the insulating member is attached to an inner wall of the first through hole to insulate and protect the inner wall of the first through hole. According to the above technical solution, the safety of the battery can be improved.SELECTED DRAWING: Figure 5

Description

Technical Field

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

Background Art

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

[0003] In the development of battery technology, in addition to improving the electrochemical performance of the battery, safety issues have also become one of the problems 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 an urgent technical problem to be solved in battery technology.

Summary of the Invention

[0004] This 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 cell including a pressure relief mechanism, wherein the pressure relief mechanism is provided on a first wall of the battery cell and is used to operate and release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value, a battery cell, an assembly member, wherein a first surface of the assembly member is assembled to the first wall, and a first through hole for the discharge from the battery cell to pass through the assembly member corresponding to the position of the pressure relief mechanism when the pressure relief mechanism operates is provided, and an insulating member at least partially adhered to the inner wall of the first through hole to insulate and protect the inner wall of the first through hole. A battery is provided that includes the insulating member.

[0006] Based on the technical solution of the embodiment of the present invention, a first through-hole is provided in the assembly member, and at least a portion of the insulating member is attached to the inner wall of the first through-hole. 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 short circuits from occurring due to direct contact between the battery cell and the inner wall of the first through-hole. Therefore, safety risks can be reduced and the safety of the battery can be improved. Furthermore, the first surface of the assembly member is assembled to a first wall on which a depressurization mechanism is provided, and when the depressurization mechanism is activated, the discharged material from the battery cell is discharged into the first through-hole. The discharged material is quickly discharged through the first through-hole, passing through the assembly member and away from the battery cell, reducing the risk and improving the safety of the battery.

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

[0008] Thus, 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, covering the inner wall of the first through-hole and providing insulating protection to the inner wall of the first through-hole. Furthermore, it is possible to easily and stably fix the insulating member to the assembly member, thereby improving the assembly efficiency of the battery.

[0009] In some possible embodiments, the bottom wall of the first groove is provided with a second through-hole for discharge from the battery cell to pass through the insulating member when the depressurization mechanism is in operation.

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

[0011] In some possible embodiments, the bottom wall of the first groove is used to block the first through-hole, and the bottom wall of the first groove is arranged to be destroyed by the discharge when the decompression mechanism is activated, so that the discharge passes through the insulating member.

[0012] Thus, when the decompression mechanism is not operating, the bottom wall of the first groove can block the first through-hole to prevent foreign matter from entering the space where the decompression mechanism is located and affecting the decompression performance of the decompression mechanism. When the decompression mechanism is operating, the bottom wall of the first groove is susceptible to damage from the discharged material so that the discharged material can pass smoothly through the insulating material and be discharged outside the battery cell.

[0013] In some possible embodiments, a vulnerable region is provided in the bottom wall of the first groove, and the vulnerable region is arranged to be destroyed by the discharge when the decompression mechanism is activated, so that the discharge passes through the vulnerable region.

[0014] By creating a vulnerable area, the bottom wall of the first groove is more easily damaged by the discharge of the battery cell, which helps in the rapid depressurization of the battery cell.

[0015] In some possible embodiments, the weak region satisfies at least one of the following conditions: the melting point of the weak region is lower than that of the rest of the insulating member; the thickness of the weak region is smaller than that of the rest of the insulating member; and the weak region is provided with a notch.

[0016] The vulnerable area can employ various configurations that make it susceptible to destruction by discharge. Thus, when the decompression mechanism is activated, the vulnerable area is more susceptible to destruction by discharge than other parts of the bottom wall of the first groove.

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

[0018] The insulating member can not only provide insulating protection to the inner wall of the first through-hole provided in the assembly member, but can also effectively prevent the application of adhesive between the assembly member and the decompression mechanism during the battery manufacturing process from hindering or affecting the operational performance of the decompression mechanism.

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

[0020] The outer edge of the first groove surrounds at least the working area, preventing any interference or adverse effect on the operation of the decompression mechanism by the adhesive flowing into the working area from any direction. Thus, it is possible to more reliably prevent the adhesive from interfering with the normal operation of the decompression mechanism, and also prevent the adhesive from flowing in and blocking the discharge passage, thereby blocking the discharge of waste released 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 projection that protrudes from the first surface and is arranged to surround the decompression mechanism, thereby preventing the adhesive from being applied between the assembly member and the decompression mechanism.

[0022] This arrangement makes it easy and effective to prevent adhesive from being applied to the surface of the vacuum mechanism during the battery manufacturing process, thereby preventing interference with the operation of the vacuum mechanism.

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

[0024] By providing the edge of the insulating member as a flange structure, not only can the processing and forming of the insulating member be facilitated, but it is also possible to simply and effectively prevent the adhesive from being applied to the surface of the decompression mechanism in the battery manufacturing process.

[0025] In some possible embodiments, the maximum height from the protruding portion to the first surface is greater than or equal to 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] By arranging in this way, it can be ensured that the protruding portion can effectively prevent the adhesive from being applied between the assembly member and the decompression mechanism. Also, the insulating member does not affect the reliable adhesion between the assembly member and the decompression mechanism and the operation of the decompression mechanism.

[0027] In some possible embodiments, a second concave groove provided opposite to the decompression mechanism is provided on the assembly member, a first through hole is provided on the bottom wall of the second concave groove, the outer edge of the first concave groove includes a first assembly wall connected to the side wall of the first concave groove, and the first assembly wall is assembled to the bottom wall of the second concave groove.

[0028] In the embodiment of the present application, by providing a second concave groove provided opposite to the decompression mechanism on the assembly member, a buffer space for the discharge of the battery cell can be provided, the impact pressure on the external structure or member due to the discharge of the battery cell can be reduced, and the safety performance of the battery can be further improved.

[0029] In some possible embodiments, the assembly member includes a first heat conduction plate and a second heat conduction plate. The first heat conduction plate is located between the first wall and e second heat conduction plate and is assembled to the first wall. A first region of the first heat conduction plate is recessed into the second heat conduction plate to form the second concave groove. The first region is connected to the second heat conduction plate, and the first through-hole is provided in the first region. An outer edge of the first concave groove further comprises a second assembly wall and a connection wall. The second assembly wall is connected to the first assembly wall through the e connection wall. The first assembly wall is assembled to the first region, and the second assembly wall is assembled to a second region of the first heat conduction plate. The second region is used for assembling to the first wall.

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

[0031] In some possible embodiments, the insulating member is arranged to provide a space for enabling the operation of the decompression mechanism, and a relief cavity is formed between the insulating member and the decompression mechanism.

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

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

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

[0035] In some possible embodiments, the assembly member is a heat management member for accommodating a fluid to adjust the temperature of the battery cell.

[0036] In a second embodiment, a power consumption device is provided that includes a battery in the first embodiment or any one of the possible embodiments of the first embodiment for providing electrical energy.

[0037] In a third embodiment, the present invention provides a battery cell comprising the steps of: providing a battery cell including a pressure reducing mechanism, the pressure reducing mechanism being provided on a first wall of the battery cell and being used to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold; providing an assembly member, the first surface of which is assembled to the first wall, and which is provided with a first through-hole corresponding to the position of the pressure reducing mechanism, for discharge from the battery cell to pass through the assembly member when the pressure reducing mechanism is activated; providing an insulating member; and attaching at least a portion of the insulating member to the inner wall of the first through-hole in order to insulate and protect the inner wall of the first through-hole.

[0038] In a fourth embodiment, the present invention provides a battery manufacturing apparatus comprising: a battery cell including a pressure reducing mechanism, the pressure reducing mechanism being provided on a first wall of the battery cell and used to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold; an assembly member having 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 reducing mechanism, for discharge from the battery cell to pass through the assembly member when the pressure reducing mechanism is activated; and an insulating member; and a mounting module for attaching at least a portion of the insulating member to the inner wall of the first through-hole to insulate and protect the inner wall of the first through-hole. [Brief explanation of the drawing]

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings necessary for use in the embodiments of this application will be briefly described below. However, obviously, the drawings described below represent only a few embodiments of this application, and those skilled in the art can obtain further drawings based on these drawings without any creative work. [Figure 1] This is a schematic diagram of the structure of a vehicle disclosed in one embodiment of the present application. [Figure 2] This is a schematic diagram of the exploded structure of a battery disclosed in one embodiment of the present application. [Figure 3] This is a schematic diagram of the structure of a battery cell disclosed in one embodiment of the present application. [Figure 4] This is a schematic diagram of the structure of a battery cell disclosed in one embodiment of the present application. [Figure 5] These are schematic diagrams and localized enlarged views of the structure of a battery disclosed in one embodiment of the present application. [Figure 6] This is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 7] This is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 8] This is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 9] This is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 10] This is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 11] This is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 12] This is a schematic diagram of the local structure of a battery disclosed in another embodiment of the present application. [Figure 13] This is a schematic diagram of the structure of a battery disclosed in yet another embodiment of the present application. [Figure 14] This is a schematic diagram of the structure of a battery disclosed in yet another embodiment of the present application. [Figure 15] This is a schematic diagram of the structure of a battery disclosed in yet another embodiment of the present application. [Figure 16]This is a schematic diagram of the structure of an insulating member disclosed in one embodiment of the present application. [Figure 17] This is a schematic diagram of the structure of an insulating member disclosed in one embodiment of the present application. [Figure 18] This is a schematic diagram of the battery as disclosed in one embodiment of the present application. [Figure 19] This is a schematic flowchart of a battery manufacturing method disclosed in one embodiment of the present application. [Figure 20] This is a schematic block diagram of a battery manufacturing apparatus disclosed in one embodiment of the present application. In the drawing portion, the drawing is not drawn to actual scale. [Modes for carrying out the invention]

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

[0041] In the description of this application, unless otherwise specified, the meaning of "multiple" is two or more (including two). Directions or positional relationships indicated by terms such as "up," "down," "left," "right," "inside," and "outside" are merely for the purpose of explaining or simplifying the explanation of this application, and do not indicate or suggest that the referred device or element necessarily has a specific direction or is configured / operated in a specific direction, and should not be understood as limiting this application. Also, terms such as "first," "second," and "third" are merely for explanatory purposes and should not be understood as indicating or suggesting relative importance. "Perpendicular" does not mean perpendicular in a strict sense, but rather within an acceptable margin of error. "Parallel" does not mean parallel in a strict sense, but rather within an acceptable margin of error.

[0042] The directional terms used in the following description all refer to the directions shown in the diagrams and do not limit the specific structure of the present application. Furthermore, in the description of the present application, 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 connections, detachable connections, integral connections, direct connections, or indirect connections via an intermediate medium. A person skilled in the art will be able to understand the specific meaning of these terms in the present application depending on the specific circumstances.

[0043] In this application, the term "and / or" simply describes a related relationship that explains the related objects, indicating that three relationships are possible. For example, A and / or B can indicate three cases: "A exists," "A and B exist simultaneously," and "B exists." In this application, the symbol " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. In this application, terms used in the specification are intended solely to describe specific embodiments and are not intended to limit the application. The terms “including” and “having” and any variations thereof in the specification, claims and brief description of the drawings above are intended to cover non-exclusive inclusion. Terms such as “first,” “second,” etc., in the specification and claims or brief description of the drawings above are for distinguishing different subjects and are not intended to describe a particular order or hierarchical relationship.

[0045] Where the “Examples” are referred to in this Application, it is meant that certain features, structures, or characteristics described with reference to the Examples may be included in at least one Example of this Application. The phrase “Examples” appearing in each location herein does not necessarily refer to the same Example, nor are they mutually exclusive, independent, or alternative Examples. As will be explicitly and implicitly understood by those skilled in the art, the Examples described herein can be combined with other Examples.

[0046] In this application, a battery refers to a physical module containing one or more battery cells to provide electrical energy. For example, a battery as 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 matter from affecting the charging or discharging of the battery cells.

[0047] Selectively, the battery cell may include, but is not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries. In some embodiments, the battery cell may be referred to as a cell.

[0048] A battery cell comprises an electrode assembly and an electrolyte, the electrode assembly consisting of a positive electrode plate, a negative electrode plate, and a separator. The battery cell operates primarily through the movement of metal ions between the positive and negative electrode plates. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer being coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protruding from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serving as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. To ensure that a large current can be carried without melting, there are multiple positive electrode tabs and they are stacked, and there are multiple negative electrode tabs and they are stacked. The material of the separator may be polypropylene (PP) or polyethylene (PE), etc. Furthermore, the electrode assembly may have a wound structure or a laminated structure, and the embodiments of this application are not limited to these.

[0049] The battery housing in the embodiments of this application is used to house multiple battery cells, busbar members, and other battery components such as thermal management members. In some embodiments, the housing may be further provided with a structure for fixing the battery cells. The shape of the housing can 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 members referred to in this application are used to establish electrical connections between multiple battery cells, such as parallel, series, or series-parallel connections. The busbar members can establish electrical connections between battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the busbar members can be fixed to the electrode terminals of the battery cells by welding. The busbar members transmit the voltage of the battery cells, and a relatively high voltage is obtained when multiple battery cells are connected in series; accordingly, the electrical connection formed by the busbar members may be called a "high-voltage connection."

[0051] The thermal control member referred to in this application is used to contain a fluid to regulate the temperature of multiple battery cells. The fluid may be a liquid or a gas, and temperature regulation refers to heating or cooling the multiple battery cells. When cooling or cooling the battery cells, the thermal control member is used to contain a cooling fluid to lower the temperature of the multiple battery cells. In this case, the thermal control member may also be called a cooling member, cooling system, or cooling plate, and the fluid contained therein may be called a cooling medium or cooling fluid, more specifically, a cooling liquid or cooling gas. The thermal control member may also be used to heat the multiple battery cells to raise their temperature, and the embodiments of this application are not limited to this. Selectively, the fluid may circulate and flow to achieve a better temperature control effect. Selectively, the fluid may be water, a mixture of water and ethylene glycol, or air.

[0052] In some battery packaging technologies, multiple battery cells are first integrated into a battery module, and then the battery module is attached to a battery housing to form a battery pack. In other battery packaging technologies, multiple battery cells can be directly attached to a battery housing to form a battery pack; such battery packaging technologies may be called cell-to-pack (CTP) packaging technologies. In CTP packaging technologies, the intermediate state of the battery module is eliminated, which reduces the mass of the battery pack and increases the energy density of the battery. In other words, in the battery packaging process, multiple battery cells may directly constitute a battery, or a battery module may be formed first, and then the battery may be formed by the battery module. The battery is then installed in a power-consuming device to provide electrical energy to the device.

[0053] As battery technology develops, it is necessary to simultaneously consider various design factors such as performance parameters like energy density, cycle life, discharge capacity, and charge / discharge ratio, and furthermore, battery safety must also be considered.

[0054] In battery cells, the main safety hazards originate from the charging and discharging processes, and it is necessary to design an appropriate ambient temperature to avoid these hazards. Generally, at least three protective measures are taken for battery cells to effectively avoid unnecessary losses. Specifically, these protective measures include at least a switching element, the selection of an appropriate separator material, and a depressurization mechanism. A switching element is a component that can stop charging or discharging the battery when the temperature or resistance within the battery cell reaches a certain threshold. A separator is used to isolate the positive and negative electrodes. When the temperature rises to a certain level, micron-order (and even nano-order) micropores attached to the separator can automatically dissolve, preventing metal ions from passing through the separator and ending the internal reaction of the battery cell.

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

[0056] The pressure reduction mechanism on a battery cell has a significant impact on battery safety. For example, if phenomena such as short circuits or overcharging occur, thermal runaway may occur inside the battery cell, causing a rapid increase in pressure or temperature. In this case, the pressure reduction mechanism releases the internal pressure and temperature to the outside, preventing the battery cell from exploding or catching fire.

[0057] As used in this application, "operation" means that the depressurization mechanism is activated or activated to a certain state so that the internal pressure and temperature of the battery cell are released. Operation by the depressurization mechanism may include, but is not limited to, rupture, shattering, tearing, or opening of at least a part of the depressurization mechanism. When the pressure release mechanism is activated, the high-temperature, high-pressure material inside the battery cell is discharged as waste from the operating part. In this way, the battery cell can be depressurized under conditions where the pressure or temperature is controllable, thereby avoiding the possibility of more serious accidents.

[0058] The waste products from the battery cell referred to in this application include, but are not limited to, the electrolyte, dissolved or broken positive and negative electrode plates, separator fragments, high-temperature and high-pressure gases generated by the reaction, and flames.

[0059] Battery cell cases are generally made of metal materials such as aluminum or steel, and if the insulation design inside the battery is poor, for example, if the conductors surrounding the battery cell may come into direct contact with the battery cell case, a short circuit is likely to occur in the battery cell. A short circuit can cause thermal runaway inside the battery cell, leading to a rapid increase in pressure or temperature, which can cause safety problems such as the battery cell exploding or catching fire.

[0060] In current insulation designs, insulation between battery cells and the surrounding conductors is generally achieved by applying insulating material to the surface of the conductors. However, in actual applications, depending on the design requirements, holes are provided in some conductor components, but current insulation designs do not consider insulating protection for the inner walls of these holes. Batteries are installed in power-consuming devices, such as vehicles. The movement of power-consuming devices such as vehicles subjects the battery to certain impacts. In order to make full use of the space inside the battery, the internal design is compact, and the distances between components are very small. Due to the impacts that power-consuming devices exert on the battery, there is a safety risk that the inner walls of holes lacking insulating protection may come into contact with the battery cell case, potentially causing a short circuit in the battery.

[0061] In view of this, the present invention provides a technical solution for insulating and protecting a first through-hole provided in an assembly member that is assembled to a battery cell with an insulating member, in order to improve the safety of the battery. More specifically, in order to insulating and protect the inner wall of the first through-hole, at least a portion of the insulating member is attached to the inner wall of the first through-hole. In this way, the insulating properties of the assembly member are improved, and it is possible to prevent short circuits from occurring due to direct contact between the battery cell and 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 this application are applicable to a variety of battery-powered devices, such as mobile phones, portable devices, laptop computers, electric bicycles, electric toys, power tools, electric vehicles, ships, and aerospace vehicles. For example, aerospace vehicles include airplanes, rockets, space shuttles, and spacecraft.

[0063] The technical solutions described in the embodiments of this application are applicable not only to the devices described above, but also to all devices that use batteries. However, for the sake of brevity, the embodiments described below will all be explained using electric vehicles as examples.

[0064] The following description will explain the structure or method provided by the embodiments of this application with reference to Figures 1 to 20. For clarity and brevity, some of the embodiments will refer to the reference numerals in the previous drawings, but it should be noted that not all of these reference numerals may be shown in the drawings corresponding to the embodiments in this section.

[0065] For example, as shown in Figure 1, this is a schematic diagram of the structure of a vehicle 1 according to 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 an extended-range electric vehicle. Inside the vehicle 1, a motor 40, a controller 30, and a battery 10 can be provided, and the controller 30 is used to control the battery 10 to supply power to the motor 40. For example, the battery 10 can be provided at the bottom, front, or rear of the vehicle 1. The battery 10 can be used to supply power to the vehicle 1, for example, as an operating power source for the vehicle 1, used in the circuit system of the vehicle 1, and can be used for the operating power needs of the vehicle 1, for example, for starting, navigation, and driving. In another embodiment of the present application, the battery 10 can not only be used as an operating power source for the vehicle 1, but can also be used as a drive power source for the vehicle 1, providing drive power to the vehicle 1 in place of or in place of fuel oil or natural gas.

[0066] To meet different needs during power use, a battery may contain multiple battery cells, which can be connected in series, parallel, or series-parallel, with series-parallel being a combination of series and parallel connections. A battery may also be called a battery pack. Selectively, multiple battery cells can first be connected in series, parallel, or series-parallel to form a battery module, and then multiple battery modules can be connected in series, parallel, or series-parallel to form a battery. In other words, multiple battery cells may directly form a battery, or they may first form battery modules and then form a battery from those battery modules.

[0067] For example, Figure 2 is a schematic diagram of the structure of a battery 10 according to one embodiment of the present invention. The battery 10 may include a plurality of battery cells 20. The battery 10 may further include a housing (or cover) 11, the interior of which is hollow, and the plurality of battery cells 20 are housed within the housing 11. Exemplarily, referring to Figure 2, the housing 11 may include two parts, which are hereby referred to as a first part 111 and a second part 112, respectively, and the first part 111 and the second part 112 engage with each other to form a housing space for housing the plurality of battery cells 20. The shapes of the first part 111 and the second part 112 can be determined according to the shape after the plurality of battery cells 20 have been combined, and both the first part 111 and the second part 112 may have one opening. For example, the first portion 111 and the second portion 112 may both be hollow rectangular parallelepipeds, and each may have only one open surface, with the openings of the first portion 111 and the second portion 112 facing each other, and the first portion 111 and the second portion 112 engaging with each other to form a housing with a sealed cavity. Multiple battery cells 20 are combined by connecting them in parallel, in series, or in series-parallel, and then placed in the housing formed after the first portion 111 and the second portion 112 are engaged.

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

[0069] In an alternative embodiment, multiple battery cells 20 can be directly connected to each other and mounted in a housing 11 to form a battery pack. Since the intermediate state of a battery module is eliminated, auxiliary structures such as crossbeams do not need to be provided in the housing 11, reducing the weight of the battery 10 and increasing the energy density of the battery 10. This embodiment may be referred to as a cell-to-pack (CTP) mounting technique in related technologies.

[0070] In a selective embodiment, the housing 11 can be integrated into the power-consuming device where the battery 10 is located. In other words, the housing 11 can be integrally molded with the structure of the power-consuming device. Multiple battery cells 20 can be connected to each other and then directly mounted to the housing 11 in the power-consuming device. For example, the housing 11 can be integrated into a local area of ​​the chassis of the vehicle 1, and multiple battery cells 20 can be connected to each other and then directly mounted to the chassis of the vehicle 1. This embodiment may be referred to in the related art as a cell-to-chassis (CTC) mounting technique.

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

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

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

[0074] Referring to Figure 3, the battery box 21 may include a housing 211 and a cover plate 212. The walls of the housing 211 and the cover plate 212 are both referred to as the walls of the battery cells 20. The housing 211 is determined according to the shape after one or more electrode assemblies 22 are combined, for example, the housing 211 may be a hollow rectangular parallelepiped, cube, or cylinder. At least one face of the housing 211 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 211. For example, if the housing 211 is a hollow rectangular parallelepiped or cube, one plane of the housing 211 may be an opening, i.e., that plane has no walls, thus connecting the inside and outside of the housing 211. If the housing 211 is a hollow cylinder, the end face of the housing 211 may be an opening, i.e., that end face has no walls, thus connecting the inside and outside of the housing 211. The cover plate 212 covers the opening and is connected to the housing 211, forming a sealed cavity in which the electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0075] Selectively, in one embodiment, as shown in Figure 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 may include a first cover plate and a second cover plate, respectively, which cover the openings on these two sides and are connected to the housing 211.

[0076] The battery cell 20 may further include two electrode terminals 214. Optionally, as shown in Figure 3, these two electrode terminals 214 may be provided on the same cover plate 212. Alternatively, in another embodiment, these two electrode terminals 214 may be provided on two separate cover plates, the first cover plate and the second cover plate, as described above, and the embodiments of the present application are not limited to this.

[0077] The cover plate 212 is typically flat, and the two electrode terminals 214 are fixed to the flat surface of the cover plate 212. The two electrode terminals 214 are the positive electrode terminal 214a and the negative electrode terminal 214b, respectively. A connecting member 23 is provided corresponding to each electrode terminal 214. This connecting member 23 may also be called a current collector 23. It is located between the cover plate 212 and the electrode assembly 22 and is used to achieve electrical connection between the electrode assembly 22 and the electrode terminals 214.

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

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

[0080] As shown in Figure 4, this is a schematic diagram of the structure of a battery cell 20 of another embodiment of the present invention. The difference from the battery cell 20 shown in Figure 3 is that a depressurization mechanism 213 may be further provided on one wall of the battery cell 20. The depressurization mechanism 213 is used to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold.

[0081] As an example, referring to Figure 4, a pressure reduction mechanism 213 may be provided in the first wall 215 of the battery cell 20.

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

[0083] The pressure reducing mechanism 213 may be part of the wall on which it is located, or it may be a separate structure from the wall on which it is located, and may be fixed to the wall on which it is located, for example by welding. For example, in the embodiment shown in Figure 4, if the pressure reducing mechanism 213 is part of the first wall 215, the pressure reducing mechanism 213 may be formed by making a cut in the first wall 215, and the thickness of the first wall 215 corresponding to this cut is smaller than the thickness of the other areas of the pressure reducing mechanism 213 excluding the cut. The cut is the most vulnerable location of the pressure reducing mechanism 213. If there is too much gas from the battery cell 20 and the internal pressure of the housing 211 rises to a threshold, or if a reaction inside the battery cell 20 generates heat and the internal temperature of the battery cell 20 rises to a threshold, the pressure reducing mechanism 213 can rupture at the cut to connect the inside and outside of the housing 211, and the gas pressure and temperature will be released to the outside by the rupture of the pressure reducing mechanism 213, further preventing the explosion of the battery cell 20.

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

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

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

[0087] By providing the pressure reducing mechanism 213 and electrode terminals 214 on different walls of the battery cell 20, when the pressure reducing mechanism 213 is activated, the discharged material from the battery cell 20 is further away from the electrode terminals 214, reducing the impact of the discharged material on the electrode terminals 214 and busbar members, thereby improving the safety of the battery. Furthermore, if the electrode terminals 214 are 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 from the battery cell 20 is discharged to the bottom of the battery 10. In this way, the danger of the discharged material can be reduced by utilizing the thermal management member at the bottom of the battery 10, while the bottom of the battery 10 is normally further away from the user, reducing harm to the user.

[0088] In some embodiments, as shown in Figure 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 can support the electrode assembly 22, and can also effectively prevent interference between the electrode assembly 22 and the fillet around the bottom wall of the housing 211. The backing plate 24 may also have one or more through holes, for example, a plurality of uniformly arranged through holes, or, if a depressurization mechanism 213 is provided in the bottom wall of the housing 211, through holes may be provided corresponding to the position of the depressurization mechanism 213 to facilitate the guidance of liquid and gas. Specifically, the spaces on the upper and lower surfaces of the backing plate 24 are connected in this way, allowing all the gas and electrolyte generated inside the battery cell 20 to pass freely through the backing plate 24.

[0089] The depressurization mechanism 213 may be any of the possible depressurization mechanisms, and is not limited to these in the embodiments of the present application. For example, the depressurization mechanism 213 may be a temperature-sensitive depressurization mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the depressurization mechanism 213 reaches a threshold, and / or the depressurization mechanism 213 may be a pressure-sensitive depressurization mechanism configured to rupture when the internal pressure of the battery cell 20 equipped with the depressurization mechanism 213 reaches a threshold.

[0090] Figure 5 is a schematic diagram and a close-up view of the structure of a battery provided by an embodiment of the present application. As shown in Figure 5, the 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 reduction mechanism 213, which is provided on the first wall 215 of the battery cell 20 and is used to release 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 shown in Figure 4.

[0092] The first surface 13a of the assembly member 13 (for example, the upper surface shown in Figure 5) 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 decompression 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 decompression 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 invention, the assembly member 13 is provided with a first through-hole 101, and at least a portion of the insulating member 14 is attached to the inner wall 13b of the first through-hole. In this way, the insulating member 14 can insulate and protect the inner wall 13b of the first through-hole, improving the insulation of the assembly member 13 and preventing short circuits from occurring due to direct contact between the battery cell 20 and the inner wall 13b of the first through-hole. Therefore, safety risks can be reduced and the safety of the battery can be improved. Furthermore, the first surface 13a of the assembly member 13 is assembled to a first wall 215 on which a depressurization mechanism 213 is provided, and when the depressurization mechanism 213 is activated, the waste from the battery cell 20 is discharged into the first through-hole 101. The waste is quickly discharged through the first through-hole 101, passing through the assembly member 13 and away from the battery cell 20, thereby reducing the risk and improving the safety of the battery.

[0095] In the embodiments of the present invention, the insulating member 14 is manufactured from an insulating material. The insulating material includes, but is not limited to, resins (e.g., thermoplastic synthetic resins, thermosetting synthetic resins, etc.), plastics (e.g., polyethylene, polyvinyl chloride, etc.), and products thereof.

[0096] In the embodiments of the present application, it is understood that at least a portion of the insulating member 14 being 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 by which the insulating member 14 is attached to the inner wall 13b of the first through hole may be adhesive, riveting, locking, or interlocking, but the present application is not limited thereto.

[0097] In some embodiments, an insulating material is applied to the inner wall 13b of the first through hole.

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

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

[0100] Selectively, as shown in Figure 5, in one embodiment of the present invention, the insulating member 14 may be hollow columnar, and the outer surface of the side wall of the hollow columnar member is assembled to the inner wall 13b of the first through hole. For example, but not limited to, the connection between the hollow columnar side wall and the inner wall 13b of the first through hole may be a interference fit, thereby securely connecting the insulating member 14 and the assembly member 13 and achieving insulating protection for the inner wall 13b of the first through hole.

[0101] In the embodiments of the present application, since the shape of the insulating member 14 conforms to the shape of the first through-hole 101, it should be understood that the shape of the insulating member 14 can be determined according to the shape of the first through-hole 101. For example, if the first through-hole 101 is cylindrical, the insulating member 14 may be hollow and columnar, and if the first through-hole 101 is cubic, the insulating member 14 may be hollow and rectangular.

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

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

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

[0105] Thus, 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, covering the inner wall 13b of the first through hole and providing insulating protection to the inner wall 13b of the first through hole. Furthermore, the insulating member 14 can be easily and stably fixed to the assembly member 13, thereby improving the assembly efficiency of the battery.

[0106] Selectively, with reference to Figure 6, in some embodiments, a second through-hole 103 may be provided in the bottom wall 143 of the first groove, the second through-hole 103 being used to allow discharge from the battery cell 20 to pass through the insulating member 14 when the decompression mechanism 213 is activated.

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

[0108] Selectively, in the embodiments of the present invention, the second through-hole 103 can be provided opposite the depressurization mechanism 213, that is, the position of the second through-hole 103 corresponds to the position of the depressurization mechanism 213. In this way, when the depressurization mechanism 213 is operating, the discharge can be discharged directly from the second through-hole 103.

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

[0110] In this way, the bottom wall 143 of the first groove can isolate the depressurization mechanism 213 so that the space in which the depressurization mechanism 213 is located does not communicate with the outside, and foreign matter such as aluminum scraps inside the housing 11 can be prevented from entering the space in which the depressurization mechanism 213 is located through the first through hole 101. Therefore, problems such as insulation failure of the battery cell or damage to the depressurization mechanism of the battery cell by foreign matter can be prevented, and further safety problems can be avoided.

[0111] In some embodiments, to selectively facilitate the passage of discharged material through the insulating member 14, the bottom wall 143 of the first groove is positioned to be destroyed by the discharged material when the decompression mechanism 213 is activated, allowing the discharged material to pass through the insulating member 14. That is, when the decompression mechanism 213 is not activated, the bottom wall 143 of the first groove can block the first through-hole 101 to prevent foreign matter from entering the space in which the decompression mechanism 213 is located and affecting the decompression performance of the decompression mechanism 213. When the decompression mechanism 213 is activated, the bottom wall 143 of the first groove is made more susceptible to destruction by the discharged material so that the discharged material can pass smoothly through the insulating member 14 and be discharged outside the battery cell 20.

[0112] For example, as shown in Figure 8, a vulnerable region 104 may be provided in the bottom wall 143 of the first groove, and the vulnerable region 104 is positioned to be destroyed by the discharge when the decompression mechanism 213 is activated, so that the discharge passes through the vulnerable region 104. By providing the vulnerable region 104, the bottom wall 143 of the first groove is more easily destroyed by the discharge of the battery cell 20, which helps in the rapid decompression of the battery cell 20.

[0113] Selectively, the vulnerable region 104 can be positioned opposite the depressurization mechanism 213. In this way, when the depressurization mechanism 213 is activated, the discharged material directly impacts the vulnerable region 104, causing it to open.

[0114] The vulnerable area 104 can employ various configurations that make it susceptible to damage from waste, and the embodiments of this application are not limited to these, but will be described below with examples.

[0115] Selectively, in one embodiment of the present invention, a low-melting-point material can be employed in the portion of the bottom wall 143 of the first groove facing the depressurization mechanism 213, such that it forms a weak region 104. That is, the melting point of the weak region 104 is lower than that of the rest of the insulating member 14. For example, the material used for the weak region 104 has a melting point lower than 400°C.

[0116] When the decompression mechanism 213 is activated, the vulnerable region 104 is more susceptible to melting and destruction by the discharge than other parts of the bottom wall 143 of the first groove.

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

[0118] Because the bottom wall of the groove 105 is weaker than other areas of the insulating member 14 and is more susceptible to being destroyed by discharge, when the decompression mechanism 213 is activated, the discharge can break through the bottom wall of the groove 105 and pass through the insulating member 14.

[0119] Selectively, the groove 105 is provided on the surface of the bottom wall 143 of the first groove that faces the first wall 215. In other words, 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 is similarly susceptible to damage from discharge.

[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 blind holes or stepped holes in the bottom wall 143 of the first groove, in order to form a vulnerable region 104, and these will not be explained in detail here.

[0122] In yet another embodiment of the present invention, notches are provided in the bottom wall 143 of the first groove to form a vulnerable region 104. For example, the bottom wall 143 of the first groove may be provided with a cross-shaped notch, an asterisk-shaped notch, or an I-shaped notch.

[0123] Since the thickness of the bottom wall 143 of the first groove corresponding to the notch is smaller than the thickness of the bottom wall 143 of the first groove excluding the notch, the notch is the weakest point of the bottom wall 143 of the first groove. When the decompression mechanism 213 is activated, the discharge can rupture the bottom wall 143 of the first groove at the notch. Thus, the discharge can break through the bottom wall 143 of the first groove and pass through the insulating member 14.

[0124] The vulnerable region 104 can employ at least two of the following methods simultaneously: using a low melting point material, setting a small thickness, and making cuts. In other words, it should be understood that the three embodiments described above may be implemented individually or in combination.

[0125] Selectively, as shown in Figures 6 to 9, in embodiments of the present invention, 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 can also effectively prevent the adhesive 15 from being applied between the assembly member 13 and the pressure reducing mechanism 213 during the battery manufacturing process, thereby preventing it from hindering or affecting the operational performance of the pressure reducing mechanism 213. Furthermore, it can improve the efficiency and precision of the application of the adhesive 15, thereby improving the manufacturing efficiency of the battery.

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

[0128] The discharge passage formed in the operating region when the depressurization mechanism 213 is activated guides the discharged material from the battery cell 20 to be discharged outside through the 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 region, preventing the adhesive 15 from flowing into the operating region from any direction and causing any interference or adverse effect on the operation of the depressurization mechanism 213. Therefore, it is possible to more reliably prevent the adhesive 15 from interfering with the normal operation of the depressurization mechanism 213, and also prevent the adhesive 15 from flowing in and blocking the discharge passage, further blocking the discharge of material released from the battery cell 20. This further improves the safety performance of the battery.

[0129] In embodiments of the present invention, the insulating member 14 can employ various possible structures to isolate the adhesive 15 used to assemble the battery cell 20 to the assembly member 13 from the space between the assembly member 13 and the depressurization mechanism 213, or to isolate the applied adhesive 15 from a space where the flow of adhesive 15 would affect the depressurization mechanism 213 in performing its depressurization design function. For example, the insulating member 14 may be designed as a portion of the area surrounding the depressurization mechanism 213 (which may be called the operating area or discharge area) that forms a discharge passage to release the internal pressure of the battery cell 20 when the depressurization mechanism 213 is in operation, allowing discharge to flow out, or it may be an area that is assembled to the assembly member 13 and corresponds to the depressurization mechanism 213, surrounding the space that enables the operation of the depressurization mechanism 213 provided by the assembly member 13.

[0130] In some embodiments, the insulating member 14 can be assembled to the area of ​​the assembly member 13 corresponding to the pressure reduction mechanism 213 before the adhesive 15 is applied. It should be noted that any member that is bonded to the battery cell 20 by the adhesive 15 in the battery can be considered to belong to or be part of the assembly member, and any of these members can use the insulating member 14, that is, the insulating member 14 can be assembled on it before the adhesive 15 is applied. In this way, when the adhesive 15 is applied, the insulating member 14 prevents the adhesive 15 from entering the area of ​​the assembly member 13 corresponding to the pressure reduction mechanism 213, in particular the area of ​​the pressure reduction mechanism 213 that operates to form a release passage for releasing the internal pressure of the battery cell 20 and allowing waste to flow out, thus ensuring that the pressure reduction mechanism 213 can operate and that its design mechanism is realized correctly. Furthermore, by employing 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 reduction mechanism 213, which can improve the application speed and accuracy of the adhesive 15 and save manufacturing time and costs.

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

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

[0133] Exemplary, the outer edge 141 of the first groove may include a body and a projection 141a. The body is used for mounting or assembling with the assembly member 13. The projection 141a protrudes outward from the surface of the body, and when assembled in a predetermined position, the projection 141a is positioned to protrude away from the surface of the body away from the assembly member 13, i.e., towards the battery cell 20. The projection 141a is provided surrounding the pressure reduction mechanism 213, and for example, the projection 141a may have an annular structure.

[0134] Selectively, as shown in Figure 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 such that the outermost portion of the outer edge 141 of the first groove is curved toward one side of the battery cell 20 relative to the first surface 13a.

[0135] By providing the edge of the insulating member 14 as a flange structure 141b, not only is the processing and molding of the insulating member 14 made easier, but the adhesive 15 can also be easily and effectively prevented from being applied to the surface of the pressure reduction mechanism 213 during the battery manufacturing process.

[0136] In the embodiments of this application, the specific structure of the flange structure 141b is not limited, and it is sufficient that the adhesive barrier function of the edge of the insulating member 14 can be achieved.

[0137] For example, if the insulating member 14 is assembled to the assembly member 13 but the assembly member 13 is not assembled to the battery cell 20, the flange structure 141b is in a free state. Referring to the schematic diagram of the state before assembly of the battery cell 20 and the assembly member 13 shown in Figure 11(a), the height between the flange structure 141b and the first surface 13a may gradually increase along the direction away from the centerline 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 and then decrease along the direction away from the centerline of the first through hole 101, or be kept constant.

[0138] When the assembly member 13 is assembled to the battery cell 20, the flange structure 141b may be subjected to force and deform. Referring to the schematic diagram of the assembled state of the battery cell 20 and the assembly member 13 shown in Figure 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 constant along the direction away from the centerline 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 centerline of the first through hole 101.

[0139] Selectively, in embodiments 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 the battery cell 20 is positioned to be compressed to match the height of the adhesive 15 when assembled to the assembly member 13.

[0140] For example, and without limitation, referring to Figures 11(a) and (b), if the protrusion 141a includes a flange structure 141b, the maximum height between the flange structure 141b and the first surface 13a before the battery cell 20 is assembled to the assembly member 13 is greater than or equal to the predetermined application height of the adhesive 15. After the battery cell 20 is assembled to the assembly member 13, the maximum height between the flange structure 141b and the first surface 13a matches the height of the adhesive 15 after compression.

[0141] By arranging them in this manner, it is possible to ensure that the protrusion 141a effectively prevents the adhesive 15 from being applied between the assembly member 13 and the pressure reducing mechanism 213. Furthermore, the insulating member 14 does not affect the secure adhesion between the assembly member 13 and the pressure reducing mechanism 213, nor the operation of the pressure reducing mechanism 213. In addition, when the battery cell 20 and the assembly member 13 are pressed or joined by the adhesive 15, the protrusion 141a can be compressed to a height matching the adhesive 15, so that no gap is left between the bonding surfaces of the battery cell 20 and the assembly member 13 by the protrusion 141a, thereby more reliably ensuring that the adhesive 15 is isolated from the area where the pressure reducing mechanism 213 operates and forms a passage for discharged material.

[0142] In some embodiments, the region in which the first through-hole 101 of the assembly member 13 is provided may be the flat plate region shown in Figures 5 to 11. In another embodiment, a groove may be further provided in the region in which the first through-hole 101 of the assembly member 13 is provided.

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

[0144] In the embodiment of the present invention, by providing a second groove 13c on the assembly member 13 facing the pressure reduction mechanism 213, a buffer space for the discharge of the battery cell 20 can be provided, reducing the impact pressure on the external structure or components due to the discharge of the battery cell 20, and further improving the safety performance of the battery.

[0145] It should be explained that when the first mounting wall 144 is mounted to the bottom wall of the second groove 13c, the remaining portion 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 Figure 12, for example. Alternatively, the remaining portion of the outer edge 141 of the first groove, excluding the first mounting wall 144, may extend to the first surface 13a so that it can be mounted to the first surface 13a.

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

[0147] As shown in Figures 13 to 15, the assembly member 13 may include a first heat conduction plate 131 and a second heat conduction plate 132. The first heat conduction plate 131 is located between the first wall 215 and the second heat conduction plate 132 and is assembled to the first wall 215. A first region 131a of the first heat conduction plate 131 is recessed into the second heat conduction plate 132 to form a second groove 13c. The first region 131a is connected to the second heat conduction plate 132, and a 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, the second mounting wall 145 being connected to the first mounting wall 144 via the connecting wall 146. The first mounting wall 144 is mounted to the first region 131a, 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] Selectively, the outer edge 141 of the first groove further includes a flange structure 141b located at the edge.

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

[0151] Selectively, 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 can be designed according to the actual needs, and the embodiments of the present application are not limited thereto.

[0152] Selectively, still referring to Figure 15, in one embodiment, the insulating member 14 is positioned to provide space that allows the depressurization mechanism 213 to operate, and a relief cavity is formed between the insulating member 14 and the depressurization mechanism 213. The relief cavity can provide deformation space for the depressurization mechanism 213 so that it deforms toward the assembly member 13 and bursts. Specifically, the relief cavity may be a sealed or unsealed cavity formed enclosing both the insulating member 14 and the depressurization mechanism 213. Exemplarily, the first groove 102 introduced earlier can be positioned as a relief cavity that can be opened when the depressurization mechanism 213 is operating.

[0153] If the first groove 102 is a relief cavity, the installation of the first groove 102 must satisfy the conditions that allow it to open when the decompression mechanism 213 is activated. Specifically, the depth of the first groove 102 is related to the dimensions of the decompression mechanism 213. In one embodiment of the present invention, 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 to make it easier to open the decompression mechanism 213. The area of ​​the opening of the first groove 102 is also related to the area of ​​the decompression mechanism 213. In order to open the decompression mechanism 213, the ratio of the area of ​​the opening of the first groove 102 to the area of ​​the decompression 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 decompression mechanism 213 may be 0.5 to 2.

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

[0155] Selectively, in some embodiments, the assembly member 13 may be a thermal management member for containing a fluid to regulate the temperature of the battery cell 20. When the battery cell 20 is to be cooled, the thermal management member may contain a cooling medium to regulate the temperature of the battery cell 20, in which case the thermal management member may be called a cooling component, cooling system, or cooling plate. The thermal management member may also be used for heating, and is not limited to this in the embodiments of the present application.

[0156] Selectively, the fluid may circulate and flow to achieve a better temperature control effect. For example, the first heat conduction plate 131 and the second heat conduction plate 132 can form a flow channel 133 for containing the fluid.

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

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

[0159] Figures 16 and 17 show schematic structural diagrams of an insulating member provided by an embodiment of the present application. Figure 16 shows a schematic three-view drawing of the insulating member, and Figure 17 shows schematic perspective views of the insulating member at two different angles.

[0160] Referring to Figures 16 and 17, the insulating member 14 may be provided with one or more first grooves 102. Taking one of the first grooves 102 as an example, the first groove 102 may include a bottom wall 143, a side wall 142, and an outer edge 141. The bottom wall 143 of the first groove can be used to close a first through hole 101 provided in the assembly member 13, the side wall 142 of the first groove can be used to adhere 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 via 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 a first region 131a of the first heat conduction plate 131, the second mounting wall 145 is used to mount to a second region 131b of the first heat conduction plate 131, and the flange structure 141b is used to prevent adhesive from entering the first groove 102 in order to prevent adhesive from being applied between the depressurization mechanism 213 and the insulating member 14.

[0162] In the embodiments shown in Figures 16 and 17, the insulating member 14 is designed as a body having an elongated, thin strip shape, with a row of recessed first grooves 102 in each body. It is understood that the body and first grooves 102 of the insulating member 14 of the present application can have various different shapes depending on factors such as the shape and configuration of the pressure reduction mechanism 213. Considering the gravimetric energy density or volumetric energy density of the battery, the body of the insulating member 14 usually has a small thickness and can generally take the form of a thin film or strip 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, circular, elliptical, or rectangular shape as shown in the figures. If a plurality of first grooves 102 are provided in the body of one insulating member 14, the flange structure 141b corresponding to the plurality of first grooves 102 may be integrally molded.

[0163] Selectively, an insulating member 14 can be designed to have a single first groove 102, multiple rows of first grooves 102, or multiple first grooves 102 arranged in any other way, provided that the arrangement and relative positions of the first grooves 102 are suitable for the installation location of the pressure reduction mechanism 213 for the battery cells 20 in the battery.

[0164] For example, if the body of the insulating member 14 is provided with a plurality of first grooves 102, each of the plurality of first grooves 102 is aligned with one decompression mechanism 213 (or aligned with the discharge area of ​​the decompression mechanism 213). This simplifies the process of assembling the insulating member 14 to the assembly member 13 and improves the assembly efficiency of the battery. Furthermore, once the insulating member 14 is assembled in a predetermined position, the flange structure 141b corresponding to the plurality of first grooves 102 can serve to isolate the adhesive from the decompression mechanisms 213 of the plurality of battery cells 20.

[0165] It should be understood that this application does not limit the orientation and position of the pressure reduction mechanism 213 in the battery cell 20. In practice, regardless of where the pressure reduction mechanism 213 is located in the battery cell 20, such as the bottom, top, or side, the relevant design of the insulating member 14 proposed in this application can be appropriately applied and will play a beneficial role in ensuring that the pressure reduction mechanism 213 fulfills its design function to release high-temperature, high-pressure waste from within the battery cell when needed, thereby ensuring the safe use of the battery.

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

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

[0168] Figure 18 is an exploded schematic diagram of a battery 10 according to one embodiment of the present invention. In the embodiment shown in Figure 18, the assembly member 13 can be assembled to the housing 11 and also to the first wall 215 of the battery cell 20 via the first surface 13a. At least a portion of the insulating member 14 is attached to the inner wall of the first through hole 101 provided in the assembly member 13. For a detailed description of each component of the battery 10, refer to the embodiments described above, and for brevity, such a description is omitted here.

[0169] One embodiment of the present invention further provides a power-consuming device which may include the battery 10 of each of the embodiments described above. Optionally, the power-consuming device may be a vehicle 1, a ship, or an aerospace aircraft.

[0170] The batteries and power-consuming devices of the embodiments of the present application have been described above. The manufacturing method and devices for the batteries of the embodiments of the present application will be described below, and for parts not described in detail, please refer to the embodiments described above.

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

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

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

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

[0175] The first surface 13a of the assembly member 13 is assembled to the first wall 215, and the assembly member 13 is provided with a first through hole 101 corresponding to the position of the decompression mechanism 213, and the first through hole 101 is used for discharge from the battery cell 20 to pass through the assembly member 13 when the decompression mechanism 213 is in operation.

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

[0177] In S340, at least a portion of the insulating member 14 is attached to the inner wall 13b of the first through hole in order to provide insulating protection to the inner wall 13b of the first through hole.

[0178] Figure 20 is a schematic block diagram of a battery manufacturing apparatus 400 according to one embodiment of the present invention. As shown in Figure 20, the apparatus 400 is The present invention provides 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 the pressure reducing mechanism 213 is used to release internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. To provide an assembly member 13, wherein the first surface 13a of the assembly member 13 is assembled to the first wall 215, and the assembly member 13 is provided with a first through-hole 101 corresponding to the position of the pressure reducing mechanism 213, through which discharge from the battery cell 20 passes when the pressure reducing mechanism 213 is in operation, To provide an insulating member 14, The provided module 410 used in this, The invention includes a mounting module 420 for attaching at least a portion of an 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] While the present application has been described with reference to preferred embodiments, various improvements can be made thereto without departing from the scope of the application, and components therein can be replaced with equivalents. In particular, each technical feature mentioned in each embodiment can be combined in any way, as long as the structures do not conflict. 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 cabinets 111 Part 1 112 Part 2 13 Assembly components 13a First surface 101 First through hole 13b Inner wall of the first through hole 13c Second groove 131 First heat conduction plate 132 Second heat conduction plate 133 Channels 131a First area 131b Second area 14 Insulating material 102 First groove 141 Outer edge of the first groove 141a Protrusion 141b Flange structure 142 Side wall of the first groove 143 Bottom wall of the first groove 144 First assembly wall 145 Second assembly wall 146 Connecting Wall 103 Second through hole 104 Vulnerable areas 105 groove 15 Adhesives 115 Protective component 20 battery cells 21 Battery box 211 Housing 212 Lid plate 213 Pressure reduction mechanism 214 Electrode terminal 214a Positive electrode terminal 214b Negative electrode terminal 215 The First Wall 22 Electrode assembly 22a First tab 22b Second tab 23 Connecting Member 24 backing plates 30 controllers 40 motors

Claims

1. A battery cell (20) including a pressure reduction mechanism (213) and electrode terminals (214), wherein the pressure reduction mechanism (213) is provided on a first wall (215) of the battery cell (20) and is used to release the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold, and the electrode terminals (214) are provided on a second wall of the battery cell (20), the second wall being different from the first wall (215), and the battery cell (20) An assembly member (13) wherein the first surface (13a) of the assembly member (13) is assembled to the first wall (215), and the assembly member (13) is provided with a first through hole (101) corresponding to the position of the pressure reducing mechanism (213), for discharge from the battery cell (20) to pass through the assembly member (13) when the pressure reducing mechanism (213) is in operation, In order to insulate and protect the inner wall (13b) of the first through hole (101), an insulating member (14) is provided, at least a portion of which is attached to the inner wall (13b) of the first through hole (101), A battery (10) characterized by including

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

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

4. The bottom wall (143) of the first groove (102) is used to block the first through hole (101), The battery (10) according to claim 2, characterized in that the bottom wall (143) of the first groove (102) is arranged to be destroyed by the discharge when the decompression mechanism (213) is activated, so that the discharge passes through the insulating member (14).

5. The battery (10) according to claim 4, wherein a vulnerable region (104) is provided in the bottom wall (143) of the first groove (102), and the vulnerable region (104) is arranged to be destroyed by the discharged material when the decompression mechanism (213) is activated, so that the discharged material passes through the vulnerable region (104).

6. The aforementioned vulnerable region (104) is The melting point of the weak region (104) is lower than that of the other parts of the insulating member (14), The thickness of the vulnerable region (104) is smaller than that of the other parts of the insulating member (14), The aforementioned vulnerable region (104) has an incision, The battery (10) according to claim 5, characterized in that it satisfies at least one of the following conditions.

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

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

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

10. The battery (10) according to claim 9, characterized in that the protruding portion (141a) includes a flange structure (141b) formed by bending the outer edge (141) of the first groove (102).

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

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

13. The assembly member (13) includes a first heat conduction plate (131) and a second heat conduction plate (132), wherein the first heat conduction plate (131) is located between the first wall (215) and the second heat conduction plate (132) and is assembled to the first wall (215), a first region (131a) of the first heat conduction plate (131) is recessed into the second heat conduction plate (132) to form the second 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 battery (10) according to 12, wherein the outer edge (141) of the first groove (102) further includes a second mounting wall (145) and a connecting wall (146), the second mounting wall (145) being connected to the first mounting wall (144) via the connecting wall (146), the first mounting wall (144) being mounted to the first region (131a), the second mounting wall (145) being mounted to the second region (131b) of the first heat conduction plate (131), and the second region (131b) being used for mounting to the first wall (215).

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

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

16. The battery (10) according to any one of claims 1 to 15, characterized in that 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, characterized in that the assembly member (13) is a thermal management member for containing a fluid to regulate the temperature of the battery cell (20).

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

19. A power consumption device characterized by including a battery (10) according to any one of claims 1 to 18 for providing electrical energy.

20. A battery cell (20) including a pressure reducing mechanism (213) and electrode terminals (214), wherein the pressure reducing mechanism (213) is provided on a first wall (215) of the battery cell (20) and is used to release the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold, and the electrode terminals (214) are provided on a second wall of the battery cell (20), the second wall being different from the first wall (215), the steps of providing a battery cell (20), The step of providing an assembly member (13), wherein the first surface (13a) of the assembly member (13) is assembled to the first wall (215), and the assembly member (13) is provided with a first through hole (101) corresponding to the position of the pressure reducing mechanism (213), for discharge from the battery cell (20) to pass through the assembly member (13) when the pressure reducing mechanism (213) is in operation, The steps include providing an insulating member (14), In order to insulate and protect the inner wall (13b) of the first through hole (101), the step is to attach at least a portion of the insulating member (14) to the inner wall (13b) of the first through hole (101), A method for manufacturing a battery, characterized by including the following:

21. The present invention provides a battery cell (20) including a pressure reduction mechanism (213) and electrode terminals (214), wherein the pressure reduction mechanism (213) is provided on a first wall (215) of the battery cell (20) and is used to release the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold, and the electrode terminals (214) are provided on a second wall of the battery cell (20), the second wall being different from the first wall (215), and To provide an assembly member (13) wherein the first surface (13a) of the assembly member (13) is assembled to the first wall (215), and the assembly member (13) is provided with a first through hole (101) corresponding to the position of the pressure reducing mechanism (213), for discharge from the battery cell (20) to pass through the assembly member (13) when the pressure reducing mechanism (213) is in operation, To provide an insulating member (14), The provided modules used in this, In order to insulate and protect the inner wall (13b) of the first through hole (101), a mounting module is provided for attaching at least a portion of the insulating member (14) to the inner wall (13b) of the first through hole (101), Battery manufacturing equipment characterized by including [a specific component].

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