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

Abstract

An embodiment of the present application provides a battery, an electrical device, a method and a device for manufacturing the battery. The battery includes: a battery cell provided with electrode terminals; a box body for accommodating the battery cell; a protective member disposed in the box body, the protective member being disposed opposite to the electrode terminals, the protective member being configured to support the battery cell in a first direction and form protection for the electrode terminals, the first direction being opposite to the gravity direction of the battery cell. The technical solution of the embodiment of the present application can enhance the safety and stability of the battery.

Description

Technical Field

[0001] The present application relates to the field of energy storage devices, and more particularly, to a battery, an electrical device, a method for manufacturing a battery, and a device for manufacturing a battery. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. In this context, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] With the continuous development of battery technology, higher requirements are put forward for the performance of batteries, and it is hoped that batteries can consider various design factors simultaneously. Summary of the Invention

[0004] The present application provides a battery, an electrical device, a method for manufacturing a battery, and a device for manufacturing a battery to improve the safety of the battery.

[0005] In a first aspect, a battery is provided, including: a battery cell provided with electrode terminals; a box body for accommodating the battery cell; a protective member disposed in the box body, the protective member being disposed opposite to the electrode terminals, the protective member being configured to support the battery cell in a first direction and form a protection for the electrode terminals, the first direction being opposite to the gravity direction of the battery cell.

[0006] In a battery, when the battery cell is disposed such that at least a part of its electrode terminals face the box body and is directly supported by the box body in a direction opposite to the gravity direction, when the box body is collided or impacted on the box body side, the box body may be deformed due to the impact force, and then the battery cell may be damaged.

[0007] The technical solution of the embodiment of the present application, by providing a protective member between the electrode terminals and the box body, enables the protective member to support the part of the battery cell provided with the electrode terminals in a direction opposite to the gravity direction. When the box body is impacted by an external force, the protective member can be used to protect the battery cell from being damaged, and the insulation protection of the electrode terminals can be strengthened.

[0008] In some embodiments, the protective member is configured to be deformed to absorb impact energy when being impacted by an external force. By forming the protective member into a structure that can be deformed when being impacted by an external force, the impact energy can be better absorbed to protect the battery cell.

[0009] In some embodiments, the protective member includes a buffer structure for absorbing impact energy when the protective member is impacted. Thereby, the rigidity of the protective member can be enhanced, and the performance of the protective member for absorbing impact energy can be further enhanced.

[0010] In some embodiments, the buffer structure is formed on the surface of the protective member facing the battery cell. As an example of the buffer structure, a honeycomb rib structure can be formed on the surface of the protective member facing the battery cell, or a silicone rubber plate can be attached to the surface of the protective member facing the battery cell.

[0011] In some embodiments, the battery cell has a cover member, the electrode terminal is disposed on the cover member, and the protective member is configured to support the cover member along the first direction. That is, in the direction of gravity, the cover member formed with the electrode terminal, the protective member, and the box body are sequentially arranged from top to bottom. The protective member supports the cover member of the battery cell from bottom to top.

[0012] In some embodiments, the cover member has a central portion, the electrode terminal is disposed on the central portion, the protective member has a protective portion disposed opposite to the central portion, and there is a gap between the protective portion and the central portion along the first direction. By forming a gap between the protective portion of the protective member and the central portion of the cover member in the first direction, it is possible to allow the protective member to deform when subjected to an impact to absorb the impact energy.

[0013] In some embodiments, along the first direction, the central portion protrudes toward the protective portion. Thus, a gap is also formed between the central portion of the cover member of the battery cell and the inside of the battery cell, and when the cover member of the battery cell is subjected to an impact, the structure inside the battery cell can also be protected.

[0014] In some embodiments, the cover member further includes side portions located on both sides of the central portion in the second direction, the second direction is orthogonal to the first direction, the protective member further includes a support portion connected to the protective portion, and the support portion is configured to support the side portions along the first direction. That is, in the cover member, side portions are respectively disposed on both sides of the central portion in the second direction, and the central portion protrudes toward the protective portion of the protective member in the first direction compared to the two side portions. The protective member is formed with support portions corresponding to the side portions, so that the side portions can be supported along the first direction by using the support portions.

[0015] In some embodiments, along the first direction, the support portion extends toward the side portion. Thus, the support portion can be arranged by using the height difference formed between the side portion and the central portion of the cover member, so that the space utilization rate can be improved and the number of battery cells arranged in a limited space can be increased.

[0016] In some embodiments, the battery further includes a thermal management component for containing a fluid to regulate the temperature of the battery cells; wherein, the support portion is configured to support the side portion through the thermal management component along the first direction. Thus, temperature management of the battery cells can be performed well.

[0017] In some embodiments, the cover component further includes a pressure relief mechanism for actuating to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold, and the protective member is provided with an exhaust port at a position opposite to the pressure relief mechanism. By forming the exhaust port opposite to the pressure relief mechanism in the protective member, gas conduction and exhaust can be easily performed, preventing the heat generated by the thermally runaway battery cell from further spreading to adjacent battery cells, and heat insulation and fire prevention can be achieved using the protective member during thermal runaway.

[0018] In some embodiments, a gas channel is formed between the protective member and the cover component, and the gas channel is in communication with the exhaust port. By forming the gas channel in communication with the exhaust port, the emissions discharged from the pressure relief mechanism of the thermally runaway battery cell can be easily guided to the exhaust port, efficiently achieving exhaust.

[0019] In some embodiments, the protective member includes a fixing portion for fixing the protective member to the box body.

[0020] In some embodiments, the fixing portion is provided on at least one side of the protective member along the second direction, the second direction is orthogonal to the first direction, and the fixing portion protrudes outward along the second direction towards the outside of the protective member.

[0021] In some embodiments, the box body includes a mounting portion, and the mounting portion is fixedly connected to the fixing portion.

[0022] As described above, in the direction of gravity, the cover component formed with electrode terminals, the protective member, and the box body are sequentially arranged from top to bottom. The fixing portion protruding outward is formed on the protective member in the second direction, and the mounting portion is correspondingly formed on the box body. Through the fixation of the fixing portion and the mounting portion, firm fixation of the protective member and the box body can be achieved.

[0023] In some embodiments, the battery has a plurality of the battery cells, and the protective member is configured to cover the plurality of battery cells. A plurality of battery cells are usually arranged regularly in the battery. In this case, by covering the plurality of battery cells with the protective member, impact protection can be provided to the battery cells in a wide range.

[0024] In a second aspect, an electrical device is provided, including: the battery of the first aspect. The battery is used to provide electrical energy.

[0025] In a third aspect, a method for manufacturing a battery is provided, including: providing a battery cell, the battery cell being provided with electrode terminals; providing a box body for accommodating the battery cell; and providing a protective member disposed in the box body, the protective member being disposed opposite to the electrode terminals, wherein the protective member is configured to support the battery cell in a first direction and form a protection for the electrode terminals, and the first direction is opposite to the gravity direction of the battery cell.

[0026] In a fourth aspect, an apparatus for manufacturing a battery is provided, including: a first providing module for providing a battery cell provided with electrode terminals; a second providing module for providing a box body for accommodating the battery cell; a third providing module for providing a protective member; and an installation module for disposing the protective member in the box body so that the protective member is disposed opposite to the electrode terminals, and configuring the protective member to support the battery cell in a first direction and form a protection for the electrode terminals, and the first direction is opposite to the gravity direction of the battery cell. Description of the Drawings

[0027] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0028] Figure 1 Schematic diagram of a vehicle according to an embodiment of the present application;

[0029] Figure 2 Schematic perspective view of a battery according to an embodiment of the present application;

[0030] Figure 3 is Figure 2 bottom view of the battery in

[0031] Figure 4 is Figure 3 I-I cross-sectional view in

[0032] Figure 5 is Figure 4 magnified view of part A in

[0033] Figure 6 is Figure 4 magnified view of part B in

[0034] Figure 7 is Figure 2 bottom view of the state of the battery in after removing the box shell;

[0035] Figure 8 is Figure 7Enlarged schematic view of part C of the fixing portion of the protective member according to an embodiment of the present application as shown;

[0036] Figure 9 is Figure 7 Schematic cross-sectional view taken along line II-II in;

[0037] Figure 10 is Figure 9 Enlarged schematic view of part D in;

[0038] Figure 11 Schematic view of the outer surface of the protective member covering multiple battery cells according to an embodiment of the present application;

[0039] Figure 12 is Figure 11 Schematic view of the inner surface of the protective member according to an embodiment of the present application as shown;

[0040] Figure 13 is Figure 12 Enlarged schematic view of part E of the buffer structure according to an embodiment of the present application as shown;

[0041] Figure 14 Schematic flow chart of a method for manufacturing a battery according to an embodiment of the present application;

[0042] Figure 15 Schematic block diagram of a device for manufacturing a battery according to an embodiment of the present application. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0045] Reference to "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0046] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "joined", and "attached" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: the sole existence of A, the simultaneous existence of A and B, and the sole existence of B. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0048] The term "plurality" as used in this application refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0049] The battery mentioned in the embodiments of this application refers to a single physical module that includes a plurality of battery cells to provide a higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc.

[0050] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the coated positive electrode active material layer protrudes from the current collector with the coated positive electrode active material layer. The current collector without the coated positive electrode active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the coated negative electrode active material layer protrudes from the current collector with the coated negative electrode active material layer. The current collector without the coated negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that large currents can pass through without fusing, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP or PE, etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of the present application are not limited thereto.

[0051] The development of battery technology needs to consider various design factors simultaneously. For example, performance parameters such as energy density, cycle life, discharge capacity, charge-discharge rate, etc. In addition, the safety of the battery also needs to be considered.

[0052] Currently, the batteries of electric vehicles often consist of dozens or even thousands of battery cells.

[0053] In an electrical device such as an electric vehicle, sometimes the battery cells are arranged in an inverted manner. That is, in the direction of gravity, the battery cells are arranged in the battery box with at least a part of the electrode terminals facing downward. In this case, if the box directly supports the battery cells in the direction opposite to the direction of gravity, when the battery arranged on the chassis of the electric vehicle is impacted by a collision or a foreign object, the box may be deformed due to the impact force, and then the electrode cells may be impacted, affecting the performance of the battery cells, and even causing the battery cells to be damaged, leading to accidents such as fire and explosion. The damage here is not only mechanical damage but also insulation damage. Therefore, it is necessary to improve the mechanical protection and insulation protection capabilities of the battery when the battery cells are inverted.

[0054] In view of this, the present application provides a technical solution. A battery includes: a battery cell provided with electrode terminals; a box for accommodating the battery cell; a protection member arranged in the box, the protection member is arranged opposite to the electrode terminals, and the protection member is configured to support the battery cell along a first direction and form protection for the electrode terminals, and the first direction is opposite to the direction of gravity of the battery cell.

[0055] By providing a protective member between the electrode terminal and the box body, and making the protective member support the part of the battery cell where the electrode terminal is provided in a direction opposite to the direction of gravity, when the box body is impacted by an external force, the protective member can be used to protect the battery cell from being damaged, and the insulation protection of the electrode terminal can be strengthened.

[0056] An embodiment of the present application provides an electric device, and the battery is used to provide electric energy.

[0057] The technical solutions described in the embodiments of the present application are applicable to various devices using batteries. For example, mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, electric vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0058] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the devices described above, but also applicable to all devices using batteries. However, for the sake of simplicity of description, the following embodiments will be described by taking electric vehicles as examples.

[0059] For example, as Figure 1 shown, it is a schematic structural diagram of a vehicle 100 according to an embodiment of the present application. The vehicle 100 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A motor 2, a controller 3, and a battery 1 can be provided inside the vehicle 100. The controller 3 is used to control the power supply of the battery 1 to the motor 2. For example, the battery 1 can be provided at the bottom, the front end, or the rear end of the vehicle 100. The battery 1 can be used for the power supply of the vehicle 100. For example, the battery 1 can be used as the operating power supply of the vehicle 100 and used for the circuit system of the vehicle 100, for example, for the working power requirements during the start, navigation, and operation of the vehicle 100. In another embodiment of the present application, the battery 1 can not only be used as the operating power supply of the vehicle 100, but also be used as the driving power supply of the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0060] In order to meet different power usage requirements, the battery 1 can include a plurality of battery cells 10. Among them, the plurality of battery cells 10 can be connected in series, in parallel, or in a series-parallel combination. The series-parallel combination means a combination of series and parallel connections.

[0061] For example, as Figure 2As shown in the figure, it is a schematic perspective view of a battery 1 according to an embodiment of the present application. The battery 1 includes a plurality of battery cells 10, and the plurality of battery cells 10 can be arranged along a second direction X and a third direction Y, where the second direction X is orthogonal to the third direction Y. That is, the plurality of battery cells 10 in the battery 1 can be arranged in a matrix-like structure. Optionally, the battery 1 can also have only one battery cell 10, or have a plurality of battery cells 1 arranged along the second direction X, or have a plurality of battery cells 10 arranged along the third direction Y. The battery 1 can further include a box body 50, the interior of the box body 50 is a hollow structure, and the plurality of battery cells 10 are accommodated in the box body 50. As Figure 2 shown, the box body 50 can include two parts, which are respectively referred to as an upper cover 51 and a box shell 52 here. The upper cover 51 and the box shell 52 are snapped together. The shapes of the upper cover 51 and the box shell 52 can be determined according to the shape of the combination of the plurality of battery cells 10. For example, the upper cover 51 and the box shell 52 can both be hollow cuboids and each has only one open surface, the openings of the upper cover 51 and the box shell 52 are arranged opposite to each other, and the upper cover 51 and the box shell 52 are snapped together to form a box body 50 with a closed chamber. It can also be that the upper cover 51 is a cuboid with an opening and the box shell 52 is a plate, or the box shell 52 is a cuboid with an opening and the upper cover 51 is a plate, the upper cover 51 and the box shell 52 are arranged opposite to each other and snapped together to form a box body 50 with a closed chamber. After the plurality of battery cells 10 are combined in parallel or in series or in a mixed connection, they are placed in the box body 50 formed by snapping the upper cover 51 and the box shell 52 together.

[0062] As Figure 3 shown, it is a schematic bottom view of the battery in Figure 2 . As Figure 4 shown, it is a schematic cross-sectional view of I-I in Figure 3 . As Figure 5 shown, it is a schematic enlarged view of part A in Figure 4 , which is a schematic structural view of the range of 2 battery cells 10 according to an embodiment of the present application. As Figure 6 shown, it is a schematic enlarged view of part B in Figure 4 , which is a schematic view of the connection manner between the protection member 30 and the cover member 20 of the battery cell 10.

[0063] As Figure 5 shown, the battery cell 10 includes a cover member 20, a housing 21, two electrode terminals 22 with opposite polarities, and one or more electrode assemblies (not shown) provided in the housing 21. The housing 21 is determined according to the shape of the combination of one or more electrode assemblies. For example, the housing 21 can be a hollow cuboid or cube or cylinder. In Figure 5The structure in which the housing 21 is a hollow rectangular parallelepiped is shown. The housing 21 has an opening through which one or more electrode assemblies can be placed into the housing 21, and the opening is closed by a cover member 20. The housing 21 is filled with an electrolyte, such as an electrolytic solution. In Figure 5 it is shown that the housing 21 has an opening at one end in the first direction Z, the battery cell 10 has a cover member 20 to close the opening of the housing 21, and two electrode terminals 22 with opposite polarities are both formed on the one cover member 20. However, it is also possible that the battery cell 10 has openings at both ends of the housing 21 along the first direction Z, and has two cover members 20 to close the two openings of the housing 21. Two electrode terminals 22 with opposite polarities can also be respectively formed on the two cover members 20. Among them, the first direction Z is the direction opposite to the direction of gravity. In Figure 5 the direction of gravity is the direction from top to bottom as shown in the figure, and the first direction Z is orthogonal to both the second direction X and the third direction Y. The electrode terminal 22 can be in various shapes such as cylindrical, rectangular parallelepiped, cube, polygonal prism, etc. In this embodiment, the electrode terminal 22 shown is in the structure of a rectangular parallelepiped.

[0064] As Figure 4 and Figure 5 shown, in the direction of gravity, from top to bottom, there are successively arranged the cover member 20 formed with the electrode terminal 22, the protective member 30, and the case 52. In the case where the battery cell 10 is arranged in the box body 50 with at least part of its electrode terminals 22 facing downward, if the case 52 directly supports the battery cell 10 from bottom to top, when an external force impacts the case 52 from below, the case 52 may be deformed due to the impact force, and then impact the electrode terminals 22 arranged on the cover member 20 of the battery cell 10, affecting the performance of the battery cell 10, and even causing the battery cell 10 to be damaged, resulting in accidents such as fire and explosion.

[0065] In this application, by arranging the protective member 30 between the electrode terminal 22 and the case 52, the protective member 30 supports the battery cell 10 in the direction opposite to the direction of gravity, that is, in the first direction Z from bottom to top. When an external force impacts the case 52 from below, the protective member 30 can play a protective role and can also be deformed to absorb the impact energy. Thus, the protective member 30 can be used to protect the battery cell 10 from being damaged and can strengthen the insulation protection of the electrode terminal 22.

[0066] As Figure 5 shown, the cover member 20 has a central portion 201 in the second direction X and side portions 202 located on both sides of the central portion 201, and the electrode terminal 22 is arranged on the central portion 201. Among them, the second direction X is orthogonal to the first direction Z.

[0067] The protective member 30 has a protective portion 301 oppositely disposed to the central portion 201 in the second direction X, and a support portion 302 connected to the protective portion 301. The support portion 302 is configured to support the side portion 202 along the first direction Z.

[0068] Along the first direction Z, there is a gap 300 between the protective portion 301 of the protective member 30 and the central portion 201. By forming this gap 300 between the protective portion 301 of the protective member 30 and the central portion 201 of the cover member 20, it is possible to allow the protective member 30 to deform when subjected to an impact from the first direction Z, so as to absorb the impact energy. To prevent interference collision between the electrode terminal 22 provided in the central portion 201 of the cover member 20 and the protective portion 301 of the protective member 30, it is preferable that there is a gap of more than 3 mm between the electrode terminal 22 and the protective portion 301.

[0069] Moreover, along the first direction Z, the central portion 201 of the cover member 20 protrudes towards the protective portion 301 compared to the side portion 202. Thus, a gap 310 is formed between the central portion 201 of the cover member 20 and the internal member of the battery cell 10. Then, when the cover member 20 of the battery cell 10 is subjected to an impact, the internal structure of the battery cell 10 can also be protected.

[0070] As Figure 5 shown, in the cover member 20, the central portion 201 protrudes towards the protective portion 301 of the protective member 30 in the first direction Z compared to the two side portions 202. Thus, a height difference in the first direction Z is formed between the side portion 202 and the central portion 201 of the cover member 20. Along the first direction Z, the support portion 302 of the protective member 30 extends from the protective portion 301 towards the side portion 202 of the cover member 20. In Figure 5 it, the support portion 302 of the protective member 30 is perpendicular to the protective portion 301, but this is not limited to this embodiment. As long as the support portion 302 can extend from the protective portion 301 towards the side portion 202 to support the side portion 202, it may not be perpendicular to the protective portion 301. Thus, the space formed by the height difference between the side portion 202 and the central portion 201 can be utilized to arrange the support portion 302 of the protective member 30, thereby improving the space utilization rate and increasing the number of battery cells 10 arranged in a limited space.

[0071] As Figure 5As shown, the cover member 20 further includes a pressure relief mechanism 203. The pressure relief mechanism 203 is used to release the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold value. The protective member 30 is provided with an exhaust port 303 at a position opposite to the pressure relief mechanism 203. The pressure relief mechanism 203 refers to an element or component that actuates to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold value. This threshold design varies according to different design requirements. The threshold value may depend on one or several materials among the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell 10. The pressure relief mechanism 203 can be in the form of, for example, an explosion-proof valve, air valve, pressure relief valve, or safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure. That is, when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold value, the pressure relief mechanism 203 performs an action or a weak structure provided in the pressure relief mechanism 203 is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0072] In this application, the term "actuate" means that the pressure relief mechanism 203 generates an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell 10 can be released. The actions generated by the pressure relief mechanism 203 can include, but are not limited to: at least a part of the pressure relief mechanism 203 rupturing, breaking, being torn, or opening, etc. When the pressure relief mechanism 203 actuates, the high-temperature and high-pressure substances inside the battery cell 10 will be discharged outward from the actuated part as emissions. In this way, the battery cell 10 can be depressurized and cooled under a controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0073] The emissions mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0074] By forming the exhaust port 303 in the protective member 30, gas conduction and exhaust can be easily carried out, preventing the heat generated by the thermally out-of-control battery cell 10 from further spreading to adjacent battery cells 10, and being able to achieve heat insulation and fire prevention by using the protective member during thermal runaway.

[0075] As Figure 6 shown, the protective member 30 supports the cover member 20 from bottom to top along the first direction Z via the thermal management component 60. The protective member 30 can also directly contact the cover member 20 to support the cover member 20, or the protective member 30 can also be fixed to the cover member 20, for example, adhered to the cover member 20 using an adhesive or the like.

[0076] The thermal management component 60 is used to accommodate a fluid for regulating the temperature of the battery cell 10. The fluid here can be a liquid or a gas, and regulating the temperature means heating or cooling the battery cell 10. In the case of cooling or lowering the temperature of the battery cell 10, the thermal management component 60 is used to accommodate a cooling fluid to lower the temperature of the battery cell 10. At this time, the thermal management component 60 can also be called a cooling component, a cooling system, a cooling plate, etc., and the fluid it accommodates can also be called a cooling medium or a cooling fluid. More specifically, it can be called a coolant or a cooling gas. In addition, the thermal management component 60 can also be used for heating to raise the temperature of the battery cell 10, which is not limited in the embodiments of the present application. Optionally, the fluid can flow cyclically to achieve a better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0077] As Figure 7 shown, it is Figure 2 a bottom view schematic diagram of the state of the battery 1 in Figure 8 after removing the housing 52. As Figure 7 shown, it is an enlarged schematic diagram of part C of the fixing portion of the protective member 30 in Figure 9 As Figure 7 shown, it is a schematic diagram of the II-II cross-section in Figure 10 As Figure 9 shown, it is an enlarged schematic diagram of part D in

[0078] As Figure 7 and Figure 8 shown, the protective member 30 includes a fixing portion 305, and the fixing portion 305 is used to fix the protective member 30 to the box body 50. The fixing portion 305 is provided on at least one side of the protective member 30 along the second direction X, and the fixing portion 305 protrudes outward along the second direction X towards the outside of the protective member 30. In Figure 7 it shows that there are 3 groups of protective members 30 arranged in the second direction X. In the left protective member 30 in Figure 7 , the fixing portion 305 provided on the right protrudes outward. In the right protective member 30 in Figure 7 , the fixing portion 305 provided on the left protrudes outward. And in the central protective member 30 in Figure 7 , the fixing portions 305 provided on the left and right respectively protrude outward. In Figure 7 it shows an example of the protective member 30 covering 10 battery cells 10 arranged in the third direction Y and provided with 3 fixing portions 305. However, as long as the protective member 30 can be firmly fixed to the box body 50, the number of the fixing portions 305 is not limited.

[0079] For installing the protective member 30, as Figure 10As shown, the box body 50 includes a mounting portion 204, and the mounting portion 204 is fixedly connected to the fixing portion 305. The mounting portion 204 may be, for example, a beam 70 provided on the upper cover 51 of the box body 50. In Figure 10 An example of the protective member 30 being fixedly connected to the beam 70 by bolts 80 is shown, but it is not limited thereto. The protective member 30 and the box body 50 may also be connected by other means such as bonding and riveting.

[0080] Thus, a fixing portion 305 that protrudes outward in the second direction X is formed on the protective member 30, and a mounting portion 204 is correspondingly formed on the box body 50. By fixing the fixing portion 305 and the mounting portion 204, a firm mounting and fixing of the protective member 30 and the box body 50 can be achieved.

[0081] As Figure 11 shown, it is a schematic diagram of the outer surface of the protective member 30 covering a plurality of battery cells 10. As Figure 12 shown, it is Figure 11 a schematic diagram of the inner surface of the protective member 30 shown. A honeycomb structure, which is an example of the buffer structure 40, is shown in the figure. As Figure 13 shown, it is Figure 12 an enlarged schematic diagram of part E of the honeycomb structure shown.

[0082] When the battery 1 has a plurality of battery cells 10, as Figure 11 shown, the protective member 30 is configured to cover the plurality of battery cells 10. In Figure 2 a structure in which a plurality of battery cells 10 are regularly arranged in the second direction X and the third direction Y in the battery 1 is shown. In this case, by correspondingly configuring the protective member 30 to cover the plurality of battery cells 10, impact protection can be provided to the battery cells 10 over a wide range.

[0083] In the case where, as Figure 11 shown, the protective member 30 covers a plurality of battery cells 10 regularly arranged in the second direction X and the third direction Y, as Figure 12 and Figure 13 shown, the protective member 30 is formed with exhaust ports 303 at positions opposite to the pressure relief mechanisms 203 of each battery cell 10, and a gas passage 304 is formed between the protective member 30 and the cover member 20. The gas passage 304 is located between the support portions 302 adjacent in the second direction X. In Figure 11 the case where a plurality of battery cells 10 are arranged in the third direction Y as shown, the support portions 302 also extend in the third direction Y. A gas passage 304 that connects the plurality of exhaust ports 303 is formed between the support portions 302 extending in the third direction Y. Thus, the emissions discharged from the pressure relief mechanism 203 of the thermally out-of-control battery cell 10 can be easily guided to the exhaust ports 303, and gas conduction and exhaust can be efficiently achieved.

[0084] As Figure 12 and Figure 13 shown, the protective member 30 is provided with a buffer structure 40 on the surface opposite to the electrode terminal 22, and the buffer structure 40 is formed by forming a plurality of reinforcing ribs into a honeycomb shape. Such a honeycomb structure can strengthen the rigidity of the protective member 30, and can absorb impact energy when the protective member 30 is impacted, maintaining the structural stability of the protective member 30. Moreover, as Figure 13 shown, since a gas passage 304 communicating with the exhaust port 303 is formed in the protective member 30, an avoidance space is formed at a portion of the honeycomb buffer structure 40 facing the electrode terminal 22, thereby avoiding contact or interference between the buffer structure 40 and the electrode terminal 22. In addition, the buffer structure 40 is not limited to such a honeycomb structure, and may also be a structure in which a silicone rubber plate or the like is attached to the surface of the protective member 30 opposite to the battery cell 10. For example, the silicone rubber plate is formed with an exhaust port 303 and a gas passage 304.

[0085] An embodiment of the present application further provides an electrical device, and the electrical device may include the battery 1 in the foregoing embodiments. The battery 1 is used to provide electrical energy in the electrical device.

[0086] The battery and the electrical device of the embodiments of the present application are described above. Next, a method and a device for manufacturing a battery according to the embodiments of the present application will be described, and the parts not described in detail may be referred to the foregoing embodiments.

[0087] Figure 14 A schematic flowchart of a method 400 for manufacturing a battery according to an embodiment of the present application is shown.

[0088] As Figure 14 shown, the method 400 may include:

[0089] 410. Provide a battery cell 10, and the battery cell 10 is provided with an electrode terminal 22;

[0090] 420. Provide a box body 50, and the box body 50 is used to accommodate the battery cell 10; and

[0091] 430. Provide a protective member 30, and the protective member 30 is disposed in the box body 50, and the protective member 30 is disposed opposite to the electrode terminal 22,

[0092] wherein the protective member 30 is configured to support the battery cell 10 along the first direction Z and form protection for the electrode terminal 22, and the first direction Z is opposite to the gravity direction of the battery cell 10.

[0093] Figure 15 A schematic block diagram of a device 500 for manufacturing a battery according to an embodiment of the present application is shown. As Figure 15As shown, the device 500 for preparing a battery may include: a first providing module 510, a second providing module 520, a third providing module 530, and a mounting module 540.

[0094] The first providing module 510 is configured to provide a battery cell 10 provided with electrode terminals 22;

[0095] The second providing module 520 is configured to provide a box body 50 for accommodating the battery cell 10;

[0096] The third providing module 530 is configured to provide a protection member 30; and

[0097] The mounting module 540 disposes the protection member 30 inside the box body 50, such that the protection member 30 is disposed opposite to the electrode terminals 22, and configures the protection member 30 to support the battery cell 10 along a first direction Z and form protection for the electrode terminals 22, the first direction Z being opposite to the gravity direction of the battery cell 10.

[0098] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that, Comprising: A battery cell, provided with electrode terminals; A box body, for accommodating the battery cell; A protective member, disposed within the box body, the protective member being disposed opposite to the electrode terminals, the protective member being configured to support the battery cell in a first direction and form a protection for the electrode terminals, the first direction being opposite to the gravity direction of the battery cell; The battery cell further has a cover member, the cover member having a central portion, the electrode terminals being disposed at the central portion, the protective member having a protection portion disposed opposite to the central portion, the protective member being configured to support the cover member in the first direction, the cover member further including side portions located on both sides of the central portion in a second direction, the second direction being orthogonal to the first direction, the protective member further including a support portion connected to the protection portion, the support portion being configured to support the side portions in the first direction.

2. The battery according to claim 1, characterized in that, The protective member is configured to be deformed to absorb impact energy when subjected to an external force impact.

3. The battery according to claim 1, characterized in that, The protective member includes a buffer structure, the buffer structure being used to absorb impact energy when the protective member is impacted.

4. The battery according to claim 3, characterized in that, The buffer structure is formed on the surface of the protective member facing the battery cell.

5. The battery according to claim 1, characterized in that, In the first direction, there is a gap between the protection portion and the central portion.

6. The battery according to claim 5, characterized in that, In the first direction, the central portion protrudes towards the protection portion.

7. The battery according to claim 1, characterized in that, In the first direction, the support portion extends towards the side portions.

8. The battery according to claim 1, wherein, Further comprising: A thermal management component, for accommodating a fluid to regulate the temperature of the battery cell; Wherein, the support portion is configured to support the side portions in the first direction through the thermal management component.

9. The battery according to claim 1, wherein The cover member further includes a pressure relief mechanism, the pressure relief mechanism being used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold, and the protective member is provided with an exhaust port at a position opposite to the pressure relief mechanism.

10. The battery according to claim 9, characterized in that, A gas channel is formed between the protective member and the cover member, and the gas channel is communicated with the exhaust port.

11. The battery according to claim 1, characterized in that, The protective member includes a fixing portion, the fixing portion being used to fix the protective member to the box body.

12. The battery according to claim 11, characterized in that, The fixing portion is provided on at least one side of the protective member in the second direction, the second direction being orthogonal to the first direction, and the fixing portion protrudes towards the outside of the protective member in the second direction.

13. The battery according to claim 11, characterized in that, The box body includes a mounting portion, and the mounting portion is fixedly connected to the fixing portion.

14. The battery according to any one of claims 1 to 13, characterized in that, The battery has a plurality of the battery cells, and the protective member is configured to cover the plurality of battery cells.

15. An electrical device, characterized in that, Including the battery according to any one of claims 1 to 14, the battery being used to provide electric energy.

16. A method for preparing a battery, characterized in that, Including: Providing a battery cell, the battery cell being provided with electrode terminals; Providing a box body, the box body being used to accommodate the battery cell; And Providing a protective member, the protective member being disposed within the box body, the protective member being disposed opposite to the electrode terminals, Among them, the protective member is configured to support the battery cell along a first direction and form protection for the electrode terminal. The first direction is opposite to the gravity direction of the battery cell. The battery cell further has a cover member, the cover member has a central portion, and the electrode terminal is disposed at the central portion. The protective member has a protection portion disposed opposite to the central portion. The protective member is configured to support the cover member along the first direction. The cover member further includes side portions located on both sides of the central portion in a second direction. The second direction is orthogonal to the first direction. The protective member further includes a support portion connected to the protection portion. The support portion is configured to support the side portions along the first direction.

17. An apparatus for preparing a battery, characterized in that, Including: A first providing module for providing a battery cell provided with an electrode terminal; A second providing module for providing a box body for accommodating the battery cell; A third providing module for providing a protective member; And An installation module for disposing the protective member in the box body, making the protective member disposed opposite to the electrode terminal, and configuring the protective member to support the battery cell along a first direction and form protection for the electrode terminal. The first direction is opposite to the gravity direction of the battery cell; Among them, the battery cell further has a cover member, the cover member has a central portion, and the electrode terminal is disposed at the central portion. The protective member has a protection portion disposed opposite to the central portion. The protective member is configured to support the cover member along the first direction. The cover member further includes side portions located on both sides of the central portion in a second direction. The second direction is orthogonal to the first direction. The protective member further includes a support portion connected to the protection portion. The support portion is configured to support the side portions along the first direction.

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