Battery, electric device, method for preparing battery and device for preparing battery

Abstract

The embodiments of the present application provide a battery, an electrical device, and a method and device for preparing the battery. The battery includes: a battery cell; a box for accommodating the battery cell; and a protective member disposed in the box, the end of the protective member in a first direction is fixed to the box, the battery cell is formed with an electrode terminal at at least one end in a second direction, and the second direction is perpendicular to the first direction; the protective member has a protective portion, the protective portion is supported on the box in the second direction, and the protective portion protrudes from the electrode terminal in the second direction, so that there is a gap between the electrode terminal and the box in the second direction, so as to protect the electrode terminal.

Description

Technical Field

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

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

[0003] With the continuous development of battery technology, higher requirements are placed on battery performance, and it is hoped that the battery can take into account multiple design factors at the same time. Summary of the invention

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

[0005] In a first aspect, a battery is provided, comprising: a battery cell; a case for accommodating the battery cell; and a protective member disposed in the case, wherein an end of the protective member in a first direction is fixed to the case, and an electrode terminal is formed at at least one end of the battery cell in a second direction, wherein the second direction is perpendicular to the first direction; the protective member comprises a protective portion, wherein the protective portion is supported on the case in the second direction, and wherein the protective portion protrudes from the electrode terminal in the second direction so that a gap exists between the electrode terminal and the case in the second direction to protect the electrode terminal.

[0006] In a battery, when a battery cell is arranged with its electrode terminals facing a case, when the case side is hit or impacted, the case may be deformed due to the impact force, which in turn impacts the electrode terminals, thereby damaging the battery cell.

[0007] The technical solution of the embodiment of the present application is to arrange a protective component with a protective part in a box body, fix the end of the protective component in the first direction to the box body, and support the protective part on the box body in the second direction, and use the protective part protruding from the electrode terminal in the second direction to make a gap between the electrode terminal and the box body in the second direction, so that when the box body is impacted by external force, the protective part of the protective component can withstand the impact, and the impact force can be transmitted from the end in the first direction to the box body via the protective component, thereby protecting the electrode terminal from the impact and preventing the battery cell from being damaged.

[0008] In some embodiments, the protective member is fixed to the box body via fixing members, and the fixing members are located at both ends of the protective member in the first direction. By fixing the protective member to the box body at both ends in the first direction using fixing members, the protective member can be more stably arranged, and the impact force from the outside can be reliably transmitted to the box body via the protective member and the fixing member.

[0009] In some embodiments, the protective member is arranged side by side with the battery cell in a third direction, and the third direction is perpendicular to the first direction and the second direction. Thus, the protective member can be arranged side by side on the side of the battery cell, which can save the installation space of the protective member and can easily provide protection for the entire battery cell.

[0010] In some embodiments, the surface of the protective member opposite to the battery cell in the third direction is joined to the battery cell. By joining the protective member to the battery cell, not only the rigidity of the protective member can be improved, but also the installation space of the protective member can be further saved, thereby improving the space utilization rate in the box.

[0011] In some embodiments, the protective member is a plate member extending in the first direction, and the protective portion is a convex portion of the protective member protruding toward the box body in the second direction. Thus, the technical effect of protecting the battery cell of the present application can be achieved with a simple structure.

[0012] In some embodiments, a cover member is provided between the box and the battery cell. When the box is impacted by external force, the cover member can absorb the impact energy and protect the battery cell, and the insulation protection of the electrode terminal can be strengthened.

[0013] In some embodiments, a sheath is installed on the surface of the cover member opposite to the battery cell, and the sheath protects the guard when the box body is impacted. By providing the sheath on the cover member, the guard can be protected by the sheath when it is impacted externally, so that the guard will not be greatly deformed or damaged due to the force, and the structural stability of the whole battery can be maintained.

[0014] In some embodiments, the cover part has a reinforcing member, the reinforcing member is used to strengthen the rigidity of the cover part, the reinforcing member is formed on the surface of the cover part opposite to the battery cell and protrudes toward the battery cell, and the sheath is engaged in the recess formed by the reinforcing member. By providing the reinforcing member on the cover part, the rigidity of the cover part can be strengthened and the ability of the cover part to absorb impact energy can be enhanced. Furthermore, by forming the reinforcing member on the surface of the cover part opposite to the battery cell and protruding toward the battery cell, and engaging the sheath in the recess formed by the reinforcing member on the cover part, the sheath can be easily positioned with a simple structure. Moreover, since there is no need to provide a separate component for fixing the sheath, the manufacturing process can be simplified and costs can be saved.

[0015] In some embodiments, the sheath has a main body, a groove is formed in the main body, the groove has an opening on a side facing the battery cell, and the protective part is inserted into the groove through the opening. By forming an opening in the groove for inserting the protective part, the sheath can be used to wrap the part of the protective part inserted into the opening, thereby providing more stable protection for the protective part.

[0016] In some embodiments, a gap is formed between the guard part and the side wall of the groove. By forming a gap between the guard part and the side wall of the groove, the guard part can be allowed to deform to a certain extent when subjected to external impact force, and the deformation of the guard part can be used to absorb the impact energy, thereby increasing the service life of the guard component.

[0017] In some embodiments, the sheath has a support portion, and the support portion is supported by the battery cell. By providing the support portion supported by the battery cell on the sheath, the installation of the sheath can be made more secure compared to a structure in which the sheath is only engaged with a recess formed in the cover component, and because the support portion is supported by the battery cell, the protective effect of the sheath on the protective component can be further enhanced by the support portion when the box body is subjected to external impact.

[0018] In some embodiments, the battery cell has a cover, the electrode terminal is disposed on the cover, and the electrode terminal protrudes from the cover along the second direction, and the support portion of the sheath is disposed opposite to the cover and supported by the cover. Thus, the support portion of the sheath can be supported on a portion of the battery cell cover where no electrode terminal is disposed, thereby improving space utilization in the battery.

[0019] In some embodiments, the battery cell has a cover body, the electrode terminal is disposed on the cover body, and the electrode terminal protrudes from the cover body along the second direction, and the cover component has a buffer member, the buffer member is disposed opposite to the cover body and supported by the cover body. Thus, the buffer member disposed on the cover component can be supported on a portion of the battery cell cover body where no electrode terminal is disposed, thereby further buffering the impact energy and improving the space utilization rate in the battery.

[0020] In some embodiments, the cover of the battery cell further includes a pressure relief mechanism, which is used to actuate to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value, and the cover component is provided with an exhaust port at a position opposite to the pressure relief mechanism. By forming an exhaust port in the cover component opposite to the pressure relief mechanism, air can be easily guided and exhausted, preventing the heat generated by the thermal runaway battery cell from further spreading to the adjacent battery cell, and the cover component can be used to achieve heat insulation and fire prevention when thermal runaway occurs.

[0021] In some embodiments, the battery has a plurality of battery cells, the plurality of battery cells are arranged in the first direction, and the protective member extends along the first direction to provide protection for the plurality of battery cells. A plurality of battery cells arranged regularly are generally provided in a battery. When a plurality of battery cells are arranged in the first direction, by extending the protective member along the first direction, the protective member can cover the plurality of battery cells, and can provide protection for a wide range of battery cells.

[0022] In a second aspect, an electrical device is provided, comprising: the battery of the first aspect. The battery is used to provide electrical energy.

[0023] In a third aspect, a method for preparing a battery is provided, comprising: providing a battery cell; providing a case for accommodating the battery cell; and providing a protective member, wherein the protective member is arranged in the case, and an end of the protective member in a first direction is fixed to the case, wherein the battery cell is formed with an electrode terminal at at least one end in a second direction, the second direction is perpendicular to the first direction, the protective member has a protective portion, the protective portion is supported on the case in the second direction, the protective portion protrudes from the electrode terminal in the second direction, so that there is a gap between the electrode terminal and the case in the second direction to protect the electrode terminal.

[0024] In a fourth aspect, a device for preparing a battery is provided, comprising: a first providing module for providing a battery cell; a second providing module for providing a box body for accommodating the battery cell; a third providing module for providing a protective component, the protective component having a protective portion; and an installation module, wherein the protective component is disposed in the box body and an end portion of the protective component in a first direction is fixed to the box body, the battery cell is formed with an electrode terminal at least at one end in a second direction, the second direction is perpendicular to the first direction, the installation module supports the protective portion on the box body in the second direction, the protective portion protrudes from the electrode terminal in the second direction, so that there is a gap between the electrode terminal and the box body in the second direction to protect the electrode terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 A schematic diagram of a vehicle according to an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of a battery according to an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the specific structure of a protective component in a battery according to an embodiment of the present application;

[0029] Figure 4 A schematic diagram of a structure in which a cover component is provided in a battery according to an embodiment of the present application;

[0030] FIG5(a) is a schematic structural diagram of a cover component facing a battery cell side according to an embodiment of the present application, wherein the cover component is provided with a sheath;

[0031] FIG5( b ) is an enlarged view of part A of FIG5( a );

[0032] Figure 5(c) is a schematic diagram of the structure of the sheath;

[0033] FIG6( a ) is a schematic top view of the assembled structure of a battery according to an embodiment of the present application;

[0034] FIG6( b ) is a cross-sectional view taken along line II of FIG6( a );

[0035] FIG6( c ) is an enlarged view of part B of FIG6( b );

[0036] FIG6( d ) is an enlarged view of portion C of FIG6( b );

[0037] Fig. 7(a) is a cross-sectional view taken along line II-II of Fig. 6(a);

[0038] FIG7( b ) is an enlarged view of portion D of FIG7( a );

[0039] Figure 8 A schematic flow chart of a method for preparing a battery according to an embodiment of the present application;

[0040] Fig. 9 A schematic block diagram of an apparatus for preparing a battery according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0043] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is 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.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0046] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0047] The battery mentioned in the embodiments of the present application refers to a single physical module including multiple battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack.

[0048] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. 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 not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. The current collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries 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 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 not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer. The current collector not coated with 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. In order to ensure that a large current can pass without melting, 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 isolation film can be PP or PE. In addition, the electrode assembly can be a winding structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0049] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery safety must also be considered.

[0050] At present, the batteries of electric vehicles often require dozens or even thousands of battery cells.

[0051] In an electrical device, when a box contains multiple battery cells, when the box is subjected to external impact force, the box may be deformed due to the impact force, and then impact the battery cells and affect the performance of the battery cells. For example, in a battery used in an electric vehicle, if the battery cells are arranged in the box with at least a part of the electrode terminals facing the vehicle chassis or the ground, when the battery arranged on the chassis of the electric vehicle is hit by a collision or foreign object, the battery cells may be damaged due to the impact force, and even cause accidents such as fire and explosion.

[0052] In view of this, the present application provides a technical solution, a battery, comprising: a battery cell; a case for accommodating the battery cell; and a protective member arranged in the case, the end of the protective member in a first direction is fixed to the case, and the battery cell is formed with an electrode terminal at at least one end in a second direction, and the second direction is perpendicular to the first direction; the protective member has a protective portion, the protective portion is supported on the case in the second direction, and the protective portion protrudes from the electrode terminal in the second direction, so that there is a gap between the electrode terminal and the case in the second direction to protect the electrode terminal.

[0053] By arranging a protective component with a protective part in the box, fixing the end of the protective component in the first direction to the box, and supporting the protective part on the box in the second direction, the electrode terminal and the box have a gap in the second direction by utilizing the protective part protruding from the electrode terminal in the second direction, when the box is impacted by external force, the protective part of the protective component can withstand the impact, and the impact force can be transmitted from the end in the first direction to the box via the protective component, thereby protecting the electrode terminal from the impact and preventing the battery cell from being damaged.

[0054] An embodiment of the present application provides an electrical device, and a battery is used to provide electrical energy to the electrical device.

[0055] The technical solutions described in the embodiments of the present application are applicable to various devices that use batteries, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0056] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0057] For example, Figure 1As shown, it is a structural schematic diagram of a vehicle 100 according to an embodiment of the present application. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 2, a controller 3 and a battery 1 may be arranged inside the vehicle 100. The controller 3 is used to control the battery 1 to supply power to the motor 2. For example, a battery 1 may be arranged at the bottom, front or rear of the vehicle 100. The battery 1 may be used to supply power to the vehicle 100. For example, the battery 1 may be used as an operating power source for the vehicle 100, for the circuit system of the vehicle 100, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 100. In another embodiment of the present application, the battery 1 may not only be used as an operating power source for the vehicle 100, but also as a driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0058] In order to meet different power usage requirements, the battery 1 may include a plurality of battery cells 10 , wherein the plurality of battery cells 10 may be connected in series, in parallel, or in hybrid connection, where hybrid connection refers to a mixture of series connection and parallel connection.

[0059] like Figure 2 As shown, it is a schematic diagram of the exploded three-dimensional structure 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 first direction X and a third direction Y, wherein the first 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 structure. Optionally, the battery 1 can also have only one battery cell 10, or have a plurality of battery cells 10 arranged along the first direction X, or have a plurality of battery cells 10 arranged along the third direction Y. The battery 1 can also include a casing 4, the interior of the casing 4 is a hollow structure, and the plurality of battery cells 10 are accommodated in the casing 4. As shown Figure 2 As shown, the box body 4 may include two parts, which are respectively referred to as the upper cover 41 and the box shell 42. The upper cover 41 and the box shell 42 are buckled together. The shape of the upper cover 41 and the box shell 42 may be determined according to the shape of the combination of multiple battery cells 10. For example, the upper cover 41 and the box shell 42 may be both hollow rectangular parallelepipeds and each may have only one open face, the opening of the upper cover 41 and the opening of the box shell 42 may be arranged oppositely, and the upper cover 41 and the box shell 42 may be buckled together to form a box body 4 with a closed chamber. Alternatively, the upper cover 41 may be a rectangular parallelepiped with an opening and the box shell 42 may be plate-shaped, or the box shell 42 may be a rectangular parallelepiped with an opening and the upper cover 41 may be plate-shaped, and the upper cover 41 and the box shell 42 may be arranged oppositely and buckled together to form a box body 4 with a closed chamber. After multiple battery cells 10 are connected in parallel, in series, or in mixed series, they are placed in the box body 4 formed by the buckling of the upper cover 41 and the box shell 42.

[0060] Figure 2The box body 4 and the battery cell 10 are arranged opposite to each other, and a protective member 7 is arranged in the box body 4. The protective member 7 is fixed to the box body 4 via the ends of the fixing member 6 in the first direction X. The fixing member 6 is located at both ends of the protective member 7 in the first direction X, so that the protective member 7 can be stably arranged, and when an external impact occurs, the impact force can be reliably transmitted to the box body 4 via the protective member 7 and the fixing member 6. Figure 3 The specific structures of the battery cell 10 and the guard member 7 will be described.

[0061] like Figure 3 , which is a schematic diagram of the specific structure of the protective component 7 in the battery 1 according to an embodiment of the present application.

[0062] exist Figure 3 1 shows an embodiment in which a plurality of battery cells 10 are arranged along a first direction X. The battery cell 10 comprises a housing 101, a cover 102, two electrode terminals 103 with opposite polarities, and one or more electrode assemblies (not shown) disposed in the housing 101. The housing 101 is determined by the shape of one or more electrode assemblies after being combined. For example, the housing 101 may be a hollow cuboid, a cube, or a cylinder. Figure 3 The structure in which the housing 101 is a hollow rectangular parallelepiped is shown in FIG. The housing 101 has an opening so that one or more electrode assemblies can be placed in the housing 101 through the opening, and the opening is closed by the cover 102. The housing 101 is filled with an electrolyte, such as an electrolyte solution. Figure 3 It is shown that the housing 101 has an opening at one end in the second direction Z, the battery cell 10 has a cover 102 to close the opening of the housing 101, and two electrode terminals 103 with opposite polarities are formed on the one cover 102. However, it is also possible that the battery cell 10 has openings at both ends of the housing 101 along the second direction Z, and has two covers 102 to close the two openings of the housing 101. The two electrode terminals 103 with opposite polarities can also be formed on the two covers 102 respectively. The second direction Z is orthogonal to the first direction X and the third direction Y. The electrode terminal 103 can be in various shapes such as a cylinder, a cuboid, a cube, a polygonal prism, etc. The electrode terminal 103 shown in this embodiment is a cuboid structure.

[0063] like Figure 3As shown, the cover 102 also includes a pressure relief mechanism 104, which is used to release the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The pressure relief mechanism 104 refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte and isolation membrane in the battery cell 10. The pressure relief mechanism 104 can take the form of an explosion-proof valve, an air valve, a pressure relief valve or a 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, the pressure relief mechanism 104 performs an action or a weak structure provided in the pressure relief mechanism 104 is destroyed, thereby forming an opening or channel for internal pressure or temperature to be released.

[0064] The "actuation" mentioned in this application means that the pressure relief mechanism 104 is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 10 can be released. The action produced by the pressure relief mechanism 104 may include but is not limited to: at least a part of the pressure relief mechanism 104 is broken, shattered, torn or opened, etc. When the pressure relief mechanism 104 is actuated, the high-temperature and high-pressure substances inside the battery cell 10 will be discharged from the actuated part as emissions. In this way, the battery cell 10 can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0065] The emissions mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of isolation membranes, high-temperature and high-pressure gases produced by the reaction, flames, etc.

[0066] The protective member 7 and the fixing member 6 are fixed together via a fastener 72. For example, Figure 3 As shown, a bolt is used as an example of a fastener 72, and threaded holes are formed in both the protective member 7 and the fixing member 6. By inserting the bolt into the threaded holes of the protective member 7 and the fixing member 6, the protective member 7 and the fixing member 6 can be fixed together. The fixing method of the protective member 7 and the fixing member 6 is not limited to this, and various fixing methods such as welding and bonding may also be used.

[0067] like Figure 3 As shown, the protective component 7 has a protective portion 71, which protrudes from the electrode terminal 103 in the second direction Z. When the upper cover 41 is arranged opposite to the battery cell 10, the protective portion 71 is supported on the upper cover 41 of the box body 4, so that there is a gap between the electrode terminal 103 and the upper cover 41 in the second direction Z.

[0068] In the battery 1 , when the battery cell 10 is arranged with the electrode terminal 103 facing the case 4 , when the case 4 is hit or impacted, the case 4 may be deformed due to the impact force, thereby impacting the electrode terminal 103 , thereby damaging the battery cell 10 .

[0069] In the embodiment of the present application, a protective component 7 having a protective portion 71 is provided in the box body 4, and the end of the protective component 7 in the first direction X is fixed to the box body 4, and the protective portion 71 is supported on the box body in the second direction Z. The protective portion 71 protrudes compared with the electrode terminal 103 in the second direction Z, so that a gap exists between the electrode terminal 103 and the box body 4 in the second direction Z. When the box body 4 is impacted by an external force, the protective portion 71 of the protective component 7 can withstand the impact, and part of the impact energy can be absorbed by the deformation of the protective portion 71. The impact force is transmitted from the end in the first direction X to the box body 4 via the fixing component 6 via the protective component 7, thereby protecting the electrode terminal 103.

[0070] like Figure 3 As shown, the protective member is arranged side by side with the battery cell 10 in the third direction Y. In this way, the protective member 7 can be arranged in contact with the side of the battery cell 10, and can easily provide protection for the entire battery cell 10. The surface of the protective member 7 that is opposite to the battery cell 10 in the third direction Y can also be joined to the battery cell 10. In this way, not only the rigidity of the protective member 7 can be improved, but also the installation space of the protective member 7 can be saved, thereby improving the space utilization rate in the box body 4. As a way of joining the protective member 7 to the battery cell 10, for example, it can be bonded using an adhesive.

[0071] As a specific structural example of the protection member 7 and the protection portion 71, Figure 3 It is shown in the figure that the protective member 7 is a plate member extending in the first direction X, and the protective portion 71 is a convex portion of the protective member 7 protruding toward the box body 4 in the second direction Z. In this way, the technical effect of protecting the battery cell 10 of the present application can be achieved with a simple structure. However, the specific structure of the protective member 7 and the protective portion 71 is not limited thereto, as long as the protective portion 71 can protrude from the electrode terminal 103 in the second direction Z, so that there is a gap between the electrode terminal 103 and the box body in the second direction Z, thereby protecting the electrode terminal 103. For example, the protective member 7 can also be a support beam, and the protective portion 71 can be a convex block in the support beam protruding toward the box body side.

[0072] As described above, in this embodiment, an example is given in which the battery cell 10 has a cover 102 at one end close to the upper cover 41 in the second direction Z, and the electrode terminal 103 is formed on the cover 102. However, the present application is not limited thereto, and in the case where the battery cell 10 has electrode terminals 103 on both sides of the second direction Z, the protective portion 71 may be provided on both sides of the protective member 7 in the second direction Z, thereby being able to cope with external impact forces from both the upper cover 41 and the box shell 42.

[0073] like Figure 4 , which is a schematic diagram of a structure in which a cover component 5 is provided in a battery 1 according to an embodiment of the present application.

[0074] Figure 4 It is shown that in this embodiment, a cover member 5 is provided between the box body 4 (shown as the upper cover 41) and the battery cell 10 on the side where the electrode terminal 103 is provided on the battery cell 10 in the second direction Z, so that when the upper cover 41 is impacted by external force, the cover member 5 can also be used to protect the battery cell 10, and the impact resistance of the battery cell 10 can be enhanced. However, the present application is not limited to this. When the battery cell 10 has the electrode terminals 103 on both sides of the second direction Z, the cover member 5 can be provided between the upper cover 41 and the battery cell 10, and between the box shell 42 and the battery cell 10, so that the external impact force from both the upper cover 41 and the box shell 42 can be dealt with.

[0075] like Figure 4 As shown, when the cover member 5 is provided between the upper cover 41 and the battery cell 10, when the upper cover 41 side is hit or impacted, the impact force is applied from the upper cover 41 to the electrode terminal 103 side via the cover member 5. In this case, the protection portion 71 is supported by the cover member 5, so that there is a gap between the electrode terminal 103 and the upper cover 41 in the second direction Z, and the electrode terminal 103 can be protected.

[0076] That is, by providing one side of the electrode terminal 103 in the second direction Z, the protective portion 71 is closer to the housing 4 than the electrode terminal 103 (the portion of the battery cell 10 closest to the housing 4), thereby achieving the technical effect of protecting the electrode terminal when impacted by external force.

[0077] FIG5(a) is a schematic structural diagram of a cover member facing the battery cell side according to an embodiment of the present application, wherein the cover member is provided with a sheath. FIG5(b) is an enlarged view of part A of FIG5(a). FIG5(c) is a schematic structural diagram of the sheath 8.

[0078] As shown in FIG5(a), a sheath 8 is installed on the surface of the cover member 5 opposite to the battery cell 10, and the sheath 8 is used to protect the protective part 71 of the protective member 7 when the box body 4 is impacted. When the box body 4 is subjected to external impact force, the sheath 8 can prevent the impact force from directly acting on the protective part 71, so that the protective part 71 will not be greatly deformed or damaged due to the force. The material used to form the sheath 8 is required to have high wear resistance and good flame retardancy, for example, PA66 (nylon 66) + 20% GF (glass fiber), PBT (polybutylene terephthalate) + 20% GF (glass fiber) and other materials.

[0079] Furthermore, the cover member 5 has a reinforcing member 51 for reinforcing the rigidity of the cover member 5, thereby enhancing the ability of the cover member 5 to absorb impact energy. Examples of the reinforcing member 51 include Figure 4 The crisscross reinforcement ribs shown in the figure are not limited to this. For example, the reinforcement ribs can also be formed in a honeycomb shape. In addition, the cover part can also have a buffer member 52, so that the impact energy can be further buffered. The material forming the buffer member 52 is required to have good elasticity and flame retardancy, for example, rubber, MPPE (modified polyphenylene ether), PU (polyurethane), etc.

[0080] The cover component 5 is provided with an exhaust port 53, which is arranged at a position opposite to the pressure relief mechanism 104 of the battery cell 10, so that when the pressure relief mechanism 104 is actuated, air can be easily guided and exhausted to prevent the heat generated by the battery cell 10 in thermal runaway from further spreading to the adjacent battery cell 10.

[0081] As shown in FIG. 5( b ), the reinforcing member 51 is formed on the surface of the cover member 5 opposite to the battery cell 10 and protrudes toward the battery cell 10 , thereby forming a plurality of recesses. The sheath 8 is engaged in the recesses formed by the reinforcing member 51 . Thus, the sheath 8 can be easily positioned with a simple structure. Moreover, since there is no need to separately provide a component for fixing the sheath 8 , cost can be saved. However, the present invention is not limited thereto, and the sheath 8 can also be provided on the cover member 5 by various methods such as screwing, bonding, and riveting.

[0082] As shown in FIG. 5( c ), the sheath 8 has a main body 81 extending along the first direction X, and a groove 82 is formed in the main body 81 , and the groove 82 has an opening on the side facing the battery cell 10. Thus, the protective part 71 can be inserted into the groove 82 through the opening. As a result, the portion of the protective part 71 inserted into the opening can be wrapped by the groove 82 of the sheath 8, so that the protective part 71 can be protected more stably. A gap can be formed between the portion of the protective part 71 inserted into the groove 82 and the side wall of the groove 82, thereby allowing the protective part 71 to deform to a certain extent when subjected to an external impact force, and the deformation of the protective part 71 can be used to absorb the impact energy, thereby increasing the service life of the protective member 7.

[0083] The sheath 8 may further form support portions 83 on both sides of the main body 81 in the third direction Y, and the support portions 83 may be supported on the battery cell 10. By providing the support portions 83 supported on the battery cell 10 on the sheath, the installation of the sheath 8 may be more secure compared to a structure in which the sheath 8 is merely engaged with a recess formed on the cover member 5, and because the support portions 83 are supported on the battery cell 10, the protective effect of the sheath 8 on the protective member 7 may be further enhanced by the support portions 83 when the box body 4 is subjected to an external impact.

[0084] FIG6(a) is a schematic top view of the assembled structure of a battery of an embodiment of the present application, FIG6(b) is a cross-sectional view II of FIG6(a), FIG6(c) is an enlarged view of part B of FIG6(b), and FIG6(d) is an enlarged view of part C of FIG6(b). In the cross-sectional view II shown in FIG6(b), the enlarged portion B represents a cross-sectional view cut off from a portion of the main body portion 81 of the sheath 8, and the enlarged portion C represents a cross-sectional view cut off from a portion of the support portion 83 of the sheath 8.

[0085] As shown in FIG6(b), the battery 1 has a plurality of battery cells 10, and the plurality of battery cells 10 are arranged in a third direction Y, and a protective member 7 is provided between two adjacent battery cells 10 in the third direction Y. As shown in the enlarged portion B of FIG6(c), the cover member 5 is provided to fit the upper cover 41, and a sheath 8 is provided on the cover member 5. The protective portion 71 of the protective member 7 protruding toward the upper cover 41 is inserted into the groove 82 of the sheath 8, and a gap is formed between the protective portion 71 and the side wall of the groove 82. As shown in FIG6(c), by providing the sheath 8, it is also possible to prevent the protective portion 71 from bending and deforming and contacting the electrical connection member 9 when subjected to external force impact, thereby improving the insulation protection of the battery as a whole.

[0086] The enlarged portion C of FIG. 6( d ) shows that the support portion 83 of the sheath 8 is disposed opposite to the cover 102 of the battery cell 10 and is supported by the cover 102 . Moreover, the buffer member 52 disposed on the cover part 5 is disposed opposite to the cover 102 of the battery cell 10 and is supported by the cover 102 . Thus, the support portion 83 of the sheath 8 can be supported on a portion of the cover 102 of the battery cell 10 where the electrode terminal 103 is not disposed, thereby improving the space utilization rate in the battery. Similarly, the buffer member 52 disposed on the cover part 5 can also be supported on a portion of the cover 102 of the battery cell 10 where the electrode terminal 103 is not disposed, thereby improving the space utilization rate in the battery while using the buffer member 52 to buffer the impact energy. In the second direction Z, the height of the buffer member 52 relative to the cover 102 of the battery cell 10 is lower than the height of the sheath 8 relative to the cover 102 .

[0087] In this case, by providing one side of the electrode terminal 103 in the second direction Z, the sheath 8 with the protective portion 71 inserted therein is closer to the cover part 5 than the electrode terminal 103 (the portion of the battery cell 10 closest to the cover part 5), thereby achieving the technical effect of protecting the electrode terminal when impacted by external force of the present application.

[0088] FIG7(a) is a II-II cross-sectional view of FIG6(a), and FIG7(b) is an enlarged view of the D portion of FIG7(a). As shown in FIG7(a), the battery 1 has a plurality of battery cells 10 arranged in a first direction X, and the protective member 7 extends along the first direction X, thereby providing protection for the plurality of battery cells 10. As shown in the enlarged portion D of FIG7(b), a portion of the top of the protective portion 71 of the protective member 7 is inserted into the groove 82 of the main body 81 of the sheath 8. However, this is not limited to this, and the entire protective portion 71 may also be inserted into the groove 82.

[0089] An embodiment of the present application further provides an electric device, which may include the battery 1 in the above embodiments. The battery 1 is used in the electric device to provide electric energy.

[0090] The above describes the battery and the electrical device of the embodiments of the present application. The following describes the method and device for preparing the battery of the embodiments of the present application. For the parts not described in detail, please refer to the aforementioned embodiments.

[0091] Figure 8 FIG. 2 is a schematic flow chart of a method 200 for preparing a battery according to an embodiment of the present application. Figure 8 As shown, the method 200 may include:

[0092] 210, providing a battery cell 10;

[0093] 220, providing a box 4 for accommodating a battery cell 10; and

[0094] 230, providing a protective member 7, the protective member 7 is disposed in the box body 4, and an end of the protective member 7 in the first direction X is fixed to the box body 4,

[0095] The battery cell 10 is provided with an electrode terminal 103 at at least one end in a second direction Z, and the second direction Z is perpendicular to the first direction X.

[0096] The protection member 7 has a protection portion 71 , which is supported on the housing 4 in the second direction Z. The protection portion 71 protrudes from the electrode terminal 103 in the second direction Z, so that there is a gap between the electrode terminal 103 and the housing 4 in the second direction Z to protect the electrode terminal 103 .

[0097] Fig. 9 FIG. 3 is a schematic block diagram of a battery manufacturing device 300 according to an embodiment of the present application. Fig. 9 As shown, the battery preparation apparatus 300 may include: a first providing module 310 , a second providing module 320 , a third providing module 330 and a mounting module 340 .

[0098] A first providing module 510 is used to provide a battery cell 10;

[0099] A second providing module 520 is used to provide a box 4 for accommodating the battery cell 10;

[0100] A third providing module 530 is used to provide a protective member 7, wherein the protective member 7 has a protective portion 71; and

[0101] The installation module 540 is used to place the protection member 7 in the box body 4 and to fix the end of the protection member 7 in the first direction X to the box body 4.

[0102] The battery cell 10 is formed with an electrode terminal 103 at at least one end of the second direction Z, and the second direction Z is perpendicular to the first direction X.

[0103] The mounting module 540 supports the protection part 71 on the box body 4 in the second direction Z. The protection part 71 protrudes from the electrode terminal 103 in the second direction Z, so that there is a gap between the electrode terminal 103 and the box body 4 in the second direction Z to protect the electrode terminal 103 .

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: Battery cells; A box body, used for accommodating the battery monomer; and A protective member is disposed in the box, and an end of the protective member in the first direction is fixed to the box. The battery cell is formed with an electrode terminal at at least one end in a second direction, wherein the second direction is perpendicular to the first direction; The protection component has a protection part, which is supported by the box body in the second direction and protrudes from the electrode terminal in the second direction so that there is a gap between the electrode terminal and the box body in the second direction to protect the electrode terminal.

2. The battery according to claim 1, characterized in that The protection member is fixed to the box body via fixing members, and the fixing members are located at both ends of the protection member in the first direction.

3. The battery according to claim 1, characterized in that The guard member is arranged side by side with the battery cell in a third direction, and the third direction is perpendicular to the first direction and the second direction.

4. The battery according to claim 3, characterized in that A surface of the guard member that is opposed to the battery cell in the third direction is joined to the battery cell.

5. The battery according to claim 1, characterized in that The guard member is a plate member extending in the first direction, and the guard portion is a convex portion of the guard member that protrudes toward the box in the second direction.

6. The battery according to claim 1, characterized in that A cover member is provided between the case and the battery cell.

7. The battery according to claim 6, characterized in that A sheath is mounted on a surface of the cover member that faces the battery cell, and the sheath protects the guard portion when the case receives an impact.

8. The battery according to claim 7, characterized in that The cover member has a reinforcing member for reinforcing the rigidity of the cover member, The reinforcing member is formed on a surface of the cover member facing the battery cell and protrudes toward the battery cell. The sheath is snap-fitted into a recess formed by the reinforcement member.

9. The battery according to claim 7, characterized in that The sheath has a main body, a groove is formed in the main body, the groove has an opening on a side facing the battery cell, and the protection part is inserted into the groove through the opening.

10. The battery according to claim 9, characterized in that A gap is formed between the guard portion and the side wall of the groove.

11. The battery according to claim 9, characterized in that The sheath has a supporting portion, and the supporting portion is supported by the battery cell.

12. The battery according to claim 11, characterized in that The battery cell has a cover body, the electrode terminal is disposed on the cover body, and the electrode terminal protrudes from the cover body along the second direction. The support portion of the sheath is disposed opposite to the cover body and is supported by the cover body.

13. The battery according to claim 6, characterized in that The battery cell has a cover body, the electrode terminal is disposed on the cover body, and the electrode terminal protrudes from the cover body along the second direction. The cover member includes a buffer member, which is provided to face the cover body and is supported by the cover body.

14. The battery according to claim 12 or 13, characterized in that: The cover of the battery cell further includes a pressure relief mechanism, which is used to be actuated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value. The cover member is provided with an exhaust port at a position opposite to the pressure relief mechanism.

15. The battery according to claim 1, characterized in that The battery has a plurality of battery cells, the plurality of battery cells are arranged in the first direction, and the protection member extends along the first direction to provide protection for the plurality of battery cells.

16. An electrical device, characterized in that: It comprises the battery according to any one of claims 1 to 15, wherein the battery is used to provide electrical energy.

17. A method for preparing a battery, characterized in that: include: Providing battery cells; Providing a box for accommodating the battery cells; and A protective member is provided, wherein the protective member is disposed in the box body, and an end portion of the protective member in the first direction is fixed to the box body, The battery cell has an electrode terminal formed at at least one end in a second direction, and the second direction is perpendicular to the first direction. The protection component has a protection part, which is supported by the box body in the second direction and protrudes from the electrode terminal in the second direction so that there is a gap between the electrode terminal and the box body in the second direction to protect the electrode terminal.

18. A device for preparing a battery, characterized in that: include: A first providing module, for providing battery cells; A second providing module, used for providing a box body for accommodating the battery cell; A third providing module is used to provide a protective component, wherein the protective component has a protective portion; and The module is installed, the protective member is arranged in the box, and the end of the protective member in the first direction is fixed to the box, The battery cell is formed with an electrode terminal at at least one end in a second direction, the second direction being perpendicular to the first direction. The mounting module supports the protection part on the box in the second direction. The protection part protrudes from the electrode terminal in the second direction, so that there is a gap between the electrode terminal and the box in the second direction to protect the electrode terminal.

Images