Battery, electric device and method for manufacturing battery

Abstract

The present application provides a battery, an electrical device and a method for manufacturing a battery, which relate to the field of battery technology. The battery includes a battery cell, a housing, a heating component and a protective assembly. The battery cell includes a plurality of battery cells arranged in a first direction. The housing is used to accommodate the battery cell, and the housing is connected to the battery cell by an adhesive. The heating component is arranged on the side of the battery cell. The protective assembly covers at least a portion of the heating component to isolate the adhesive from the heating component. The protective assembly can ensure the connection strength between the housing and the battery cell, and prevent the adhesive from overflowing and sticking to the heating component, causing the heating component to fail.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery, an electrical device and a method for manufacturing a battery. Background Art

[0002] In the prior art, under low temperature environment, the viscosity of the electrolyte inside the battery cell decreases, the internal resistance of the battery cell increases, and the low temperature power decay accelerates, resulting in a decrease in power. Therefore, it is necessary to adjust and maintain the activity of the battery cell by heating the battery cell to ensure the performance of the battery in a low temperature environment.

[0003] During use, the heating component often breaks, causing battery failure. In order to reduce this failure, heating components with better bending performance, low temperature resistance and stronger insulation performance are usually selected. However, this problem has not been improved. Therefore, it is urgent to solve the problem of heating component failure. Summary of the invention

[0004] The present application provides a battery, an electrical device and a method for manufacturing a battery, which can isolate a heating component from an adhesive, thereby increasing the service life of the heating component and improving the performance of the battery.

[0005] According to a first aspect of the present application, a battery is provided, comprising: a battery cell, comprising a plurality of battery cells arranged along a first direction; a case for accommodating the battery cell, the case being connected to the battery cell via an adhesive; a heating member, disposed on a side of the battery cell; and a protective assembly, covering at least a portion of the heating member to isolate the adhesive from the heating member.

[0006] In the embodiment of the present application, the protective component can cover at least part of the heating component to isolate the adhesive from the heating component. The protective component can prevent the adhesive from overflowing and adhering to the heating component, reduce the expansion of the battery cell during use, and cause shear force between the part of the heating component bonded by the adhesive and the part not bonded, resulting in the rupture of the heating component.

[0007] In some embodiments, the resistance wire of the heating component includes a connected heating part and an outlet part, the heating part is used to provide heat to the battery unit, and the outlet part is used to connect to the power supply, and the protection component includes a main body, and the main body covers at least part of the heating part. The main body covers at least part of the heating part of the heating component, which can prevent the overflowed adhesive from adhering to the heating part, causing the heating part to be short-circuited and ineffective, thereby ensuring the service life of the heating component.

[0008] In some embodiments, the main body is connected to the battery cell by a connector, and the connector includes a transverse connecting portion, which extends along a first direction, and in the vertical direction, the highest point of the transverse connecting portion is lower than the lowest point of the heating portion. The transverse connecting portion connects the main body and the battery cell, and the transverse connecting portion is lower than the heating portion, so that the gap between the main body and the lower end of the battery cell in the vertical direction is closed, reducing the possibility of the adhesive flowing from the lower end of the main body into contact with the heating portion. At the same time, when the heating portion is stretched by the expanded battery cell, since the transverse connecting portion is lower than the heating portion, that is, the transverse connecting portion is not in contact with the heating portion, the heating portion is prevented from being affected by the transverse connecting portion, and the possibility of a part of the heating portion being sheared and broken is avoided.

[0009] In some embodiments, the connector further includes a first longitudinal connection portion and a second longitudinal connection portion, which are respectively arranged at two ends of the main body along the first direction, and the first longitudinal connection portion and the second longitudinal connection portion both extend in the vertical direction, and the heating portion is located between the first longitudinal connection portion and the second longitudinal connection portion along the first direction. The first longitudinal connection portion and the second longitudinal connection portion are arranged at two ends of the main body along the first direction and are connected to the battery unit, so that the passages between the main body and the battery unit at both ends in the first direction can be closed, so as to reduce the adhesive or other foreign matter such as burrs from entering the heating portion from both ends of the main body in the first direction, thereby affecting the normal operation of the heating portion.

[0010] In some embodiments, along the vertical direction, the first longitudinal connection part and the second longitudinal connection part are both connected to the transverse connection part. The first longitudinal connection part and the second longitudinal connection part are both connected to the transverse connection part, so that there is no gap between the first longitudinal connection part, the second longitudinal connection part and the transverse connection part, respectively, to prevent adhesive or other foreign matter such as burrs from entering the gap between the main body part and the battery unit from the gap between the first longitudinal connection part and the second longitudinal connection part and the transverse connection part, thereby affecting the heating part.

[0011] In some embodiments, the protection assembly further includes a first extension portion, the first extension portion is located at one end of the main body away from the bottom of the battery in the vertical direction, the beam of the box is located on the side of the main body away from the battery cell, a gap is formed between the beam and the main body, at least part of the adhesive is located in the gap, and the first extension portion extends from the main body toward the beam of the box to block the gap. The adhesive will gradually move upward in the vertical direction along the gap. When the adhesive content is high, it may overflow from the outlet of the gap to other locations, affecting the use of other components. The possibility of the adhesive overflowing from the gap and affecting other components is reduced by blocking by the first extension portion.

[0012] In some embodiments, a protrusion is provided at one end of the first extension away from the main body, and the protrusion extends downward in a vertical direction. The protrusion can contact the beam to increase the strength of the first extension and reduce the deformation of the first extension.

[0013] In some embodiments, the first extension part abuts against the beam to prevent the adhesive from overflowing from the gap. The abutment between the first extension part and the beam can further prevent the adhesive from overflowing from the gap to other locations and affecting the use of other components.

[0014] In some embodiments, the bottom surface of the first extension part along the vertical direction abuts against the beam. The bottom surface of the first extension part along the vertical direction abuts against the beam to prevent the adhesive from overflowing from the gap to other locations and affecting the use of other components, and can also improve the strength of the first extension part and reduce the deformation of the first extension part.

[0015] In some embodiments, the protection assembly further includes a second extension portion, the second extension portion is located at one end of the main body portion close to the bottom of the battery in the vertical direction, the second extension portion extends from the main body portion toward the direction close to the battery unit, the second extension portion is arranged between the bottom of the battery unit and the box body, and abuts against the battery unit in the vertical direction. The second extension portion can provide a positioning function when installing the protection assembly, facilitating the installation of the protection assembly.

[0016] In some embodiments, the thickness of the second extension portion is greater than that of the main body portion. The second extension portion has a large thickness, which can prevent foreign objects such as burrs at the bottom of the box from damaging the battery cells.

[0017] In some embodiments, an insulating member is provided between the bottom of the battery cell and the box, and the thickness of the insulating member is greater than the thickness of the second extension portion. The insulating member increases the gap between the bottom of the battery cell and the box, allowing the adhesive to spread, thereby providing a sufficient bonding area between the battery cell and the box. At the same time, the thickness of the insulating member is greater than the thickness of the second extension portion, allowing the adhesive at the bottom of the battery cell to overflow from the bottom to the side of the battery cell, thereby increasing the bonding area and improving the connection strength.

[0018] In some embodiments, the protection component is made of insulating material. The protection component is made of insulating material, which can improve the insulation protection performance of the battery unit.

[0019] According to a second aspect of the present application, there is provided an electrical device, comprising: the battery of the first aspect, the battery being used to provide electrical energy.

[0020] According to the third aspect of the present application, a method for manufacturing a battery is provided, comprising: arranging a plurality of battery cells along a first direction to form a battery unit; arranging a heating component on the side of the battery unit; covering at least part of the heating component with a protective component; and connecting the box body and the battery unit with an adhesive. The protective component can isolate the adhesive from the heating component to prevent the adhesive from overflowing and causing the heating component to fail, thereby improving the performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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:

[0022] Figure 1 A schematic diagram of a vehicle according to an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the structure of a battery according to an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the internal structure of a battery according to an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the exploded structure of a battery according to an embodiment of the present application;

[0026] Figure 5 for Figure 3 A front view structural diagram of the protective assembly of the illustrated embodiment in an assembled state;

[0027] Figure 6 A cross-sectional view of a heating component according to an embodiment of the present application;

[0028] Figure 7 A rear view of a protective assembly according to an embodiment of the present application;

[0029] Figure 8 This is a schematic diagram of the structure of a protection component according to an embodiment of the present application;

[0030] Fig. 9 A schematic diagram of the combined structure of a battery cell and a protective assembly according to an embodiment of the present application;

[0031] Fig.10 for Fig. 9 The enlarged view of point A in the middle;

[0032] Fig.11 The present invention is a flowchart of a method for manufacturing a battery according to an embodiment of the present invention.

[0033] In the drawings, the drawings are not drawn to scale.

[0034] Marking Description:

[0035] 1-Vehicle; 10-Battery; 11-Controller; 12-Motor;

[0036] 20-box; 21-upper box; 22-lower box; 23-beam; 24-insulating member; 25-adhesive;

[0037] 30 - battery unit; 31 - battery cell; 32 - heating member; 33 - resistance wire; 331 - heating part; 331a - first insulating layer; 331b - second insulating layer; 332 - outlet part;

[0038] 40-protection component; 41-main body; 411-connecting piece; 412-transverse connecting part; 413-first longitudinal connecting part; 414-second longitudinal connecting part; 42-first extension part; 421-protrusion; 43-second extension part; 44-reinforcement rib;

[0039] X-first direction; Y-second direction; Z-vertical direction. DETAILED DESCRIPTION

[0040] 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 and completely 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.

[0041] 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.

[0042] 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.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The term "plurality" used in the present application refers to two or more (including two).

[0045] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0046] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more 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. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0047] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of 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 (polypropylene) or PE (polyethylene). 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.

[0048] In order to meet different power usage requirements, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series, in parallel, or in hybrid connection, wherein hybrid connection refers to a mixture of series connection and parallel connection.

[0049] The performance of batteries will be affected in low temperature environments. Usually, heating components are added to the batteries to improve the performance of the batteries in low temperature environments. However, during use, the heating components often break, causing battery failure. In order to reduce this failure, heating components with better bending performance, low temperature resistance, and stronger insulation performance are usually selected. However, this problem has not been improved.

[0050] The inventors further discovered that in order to ensure the connection strength between the battery unit and the box, a large amount of adhesive is usually set at the bottom of the box, and the adhesive will overflow upward along the gap and adhere to the heating component. After the battery unit is used for a period of time, it will expand. When the resistance wire of the heating component is adhered by the adhesive and solidified, the resistance wire in the area where the adhesive is attached will lose its elasticity and cannot deform with the expanded battery unit, while the resistance wire in the area not attached by the adhesive will still deform with the expanded battery unit. Shear force is generated between the bonded area and the unbonded area, resulting in the breakage of the resistance wire at the connection between the bonded area and the unbonded area, causing the heating component to fail.

[0051] In response to the above problems, the inventors reduced the amount of adhesive to prevent excessive adhesive overflow. However, after reducing the amount of adhesive, it was found that the connection strength between the battery unit and the box body was reduced; and the flatness of the box body corresponding to the bottom of the battery unit was irregular, and the protrusions at the bottom of the box body would still cause the adhesive to overflow to the heating component.

[0052] In view of this, the present application sets a protective component at the heating component to cover at least part of the heating component and isolate the adhesive from the heating component. While ensuring the connection strength between the box and the battery unit, it solves the problem of adhesive overflowing and sticking to the heating component, causing the heating component to fail.

[0053] An embodiment of the present application provides an electrical device, wherein a battery is used to provide electrical energy.

[0054] The technical solutions described in the embodiments of the present application are applicable to batteries and various electrical devices using batteries, and the electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0055] It should be understood that the batteries, electrical devices and methods for manufacturing batteries 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.

[0056] For example, Figure 1 As shown, it is a schematic diagram of the structure of a vehicle 1 according to an embodiment of the present application. The vehicle 1 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 battery 10 may be provided inside the vehicle 1. Specifically, for example, the battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery may be used as an operating power source for the vehicle 1. The vehicle 1 may further include a controller 11 and a motor 12. The controller 11 is used, for example, to control the battery 10 to power the motor 12. The battery 10 may be used for the starting, navigation and operating power requirements of the vehicle 1. Of course, the battery 10 may also be used to drive the vehicle 1 to travel, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0057] like Figure 2 As shown, it is a structural schematic diagram of a battery 10 according to an embodiment of the present application. The battery 10 may include a plurality of battery cells 31, and the plurality of battery cells 31 are arranged along a first direction X to form a battery unit 30, and the first direction X is the length direction of the battery unit 30. The battery 10 may also include a case 20, the interior of the case 20 is a hollow structure, and the plurality of battery cells 31 are accommodated in the case 20. The case 20 may include two parts, which are respectively referred to as an upper case 21 and a lower case 22, and the upper case 21 and the lower case 22 are buckled together. The shapes of the upper case 21 and the lower case 22 may be determined according to the shape of the battery unit 30 combination, and the upper case 21 and the lower case 22 may each have an opening. For example, the upper case 21 and the lower case 22 may both be hollow cuboids and each has only one face as an opening face, the opening of the upper case 21 and the opening of the lower case 22 are arranged opposite to each other, and the upper case 21 and the lower case 22 are buckled together to form a case with a closed chamber. Alternatively, the upper box 21 is a rectangular parallelepiped with an opening and the lower box 22 is a plate, or the lower box 22 is a rectangular parallelepiped with an opening and the upper box 21 is a plate, and the upper box 21 and the lower box 22 are arranged opposite to each other and buckled to form a box 20 with a closed chamber. The battery cells 30 are connected in parallel, in series, or in a mixed combination and placed in the box 20 formed by buckling the upper box 21 and the lower box 22. The box 20 may also include a beam 23, which is a long strip structure arranged in the lower box 22 along the first direction X, opposite to the battery cells 30, and used to position and fix the battery cells 30.

[0058] Optionally, the battery 10 may also include other structures, which will not be described in detail here, such as a combination of multiple layers of battery cells 30, or a busbar component, a signal collection harness, a processor, etc.

[0059] Figure 3 This is a schematic diagram of the combination of a battery unit and a lower box according to an embodiment of the present application. Figure 4 for Figure 3 Schematic diagram of the decomposition.

[0060] like Figure 3 and Figure 4 As shown, the present application provides a battery 10, including a battery cell 30, a box 20, a heating member 32 and a protective assembly 40. The battery cell 30 includes a plurality of battery cells 31 arranged along a first direction X. The box 20 is used to accommodate the battery cell 30, and the box 20 is connected to the battery cell 30 through an adhesive 25 (not shown in the figure). The heating member 32 is arranged on the side of the battery cell 30. The protective assembly 40 covers at least a portion of the heating member 32, and is used to isolate the adhesive 25 from the heating member 32.

[0061] like Figure 3As shown, the lower box 22 is connected and fixed to the battery cell 30 by an adhesive 25. The adhesive 25 changes from liquid to solid after use. After the adhesive 25 solidifies, the shape is stable and can withstand external forces. The adhesive 25 is generally a polymer compound, including but not limited to polyvinyl alcohol, polytetrafluoroethylene, sodium carboxymethyl cellulose, polyolefins, fluorinated rubber, polyurethane, etc. When the adhesive 25 is in liquid state, it has strong fluidity and will expand when squeezed during use, filling the gap between the battery cell 30 and the beam 23.

[0062] The heating component 32 is used to heat the battery 10 when working in a low temperature environment. The heating component 32 is composed of a resistance wire and an external insulating film. The material of the resistance wire includes but is not limited to commonly used metal materials such as copper and nickel, conductive materials such as graphite, silicon compounds, conductive inks, carbon fibers, conductive silicates, and polymer materials such as silica gel and polyimide. The heating component 32 is a component that can heat the battery cell 30 and has its own insulating properties. When the heating component 32 is connected to a power source and the battery cell 30 needs to be heated, the position where each battery cell 31 contacts the heating component 32 begins to receive the heat generated by the heating component 32.

[0063] The protective component 40 covers at least part of the heating member 32, which means that the projection of the protective component 40 overlaps with the projection of the heating member 32 on the side of the battery cell 30 perpendicular to the heating member 32. When the battery cell 30 and the box 20 are fixed by the adhesive 25, they are squeezed, and the adhesive 25 overflows from the bottom of the box 20, and climbs upward in the vertical direction Z along the gap between the box 20 and the battery cell 30. When it rises to the heating member 32, the protective component 40 can prevent the adhesive 25 from adhering to the heating member 32, and play an isolation role. The part of the heating member 32 covered by the protective component 40 can be determined according to the height of the position where the adhesive 25 overflows. For example, the extension length of the protective component 40 in the first direction X can be longer than the extension length of the heating member 32 in the first direction X. The height of the protective component 40 can be lower than the heating member or higher than the heating member, which can be determined according to the actual height of 25. Among them, isolation means to cut off or cut off contact. The protective component 40 is arranged outside the heating component 32, which can cut off the contact between the adhesive 25 and the heating component 32 after overflowing in the vertical direction Z, so that the position of the heating component 32 covered by the protective component 40 does not contact the adhesive 25. The protective component 40 can be a plate-like structure, or a block-like structure, as long as it can isolate the heating component 32 from the adhesive 25. Among them, the heating component 32 can be arranged on one side, or both sides, or all around the battery unit 30, for example, and this application does not limit this.

[0064] The embodiment of the present application discloses a battery 10 having a protective component 40 disposed at a heating component 32, and the protective component 40 can cover at least a portion of the heating component 32 to isolate the adhesive 25 from the heating component 32. The protective component 40 can prevent the adhesive 25 from overflowing and adhering to the heating component 32, thereby reducing the expansion of the battery cell 31 during use, causing shear force to be generated between the portion of the heating component 32 bonded by the adhesive 25 and the portion not bonded, and causing the heating component 32 to break.

[0065] In some embodiments, Figure 4 As shown, an insulating member 24 may be further provided between the battery cell 30 and the lower case 22 to increase the gap between the battery cell 30 and the lower case 22 so that the adhesive 25 extends between the battery cell 30 and the lower case 22 to ensure the bonding area.

[0066] In some embodiments, Figure 5 and Figure 6 As shown, the resistance wire 33 of the heating component 32 includes a connected heating part 331 and an outlet part 332, the heating part 331 is used to provide heat to the battery cell 32, and the outlet part 332 is used to connect to a power source, and the protective component 40 includes a main body 41, and the main body 41 covers at least part of the heating part 331.

[0067] The resistance wire 33 is the main functional part of the heating component 32. The resistance wire 33 can be divided into a heating part 331 and an outlet part 332 according to the function, wherein the outside of the resistance wire 33 is wrapped with a first insulating layer 331a and a second insulating layer 331b for insulation. The setting method of the heating part 331 of the resistance wire 33 can be, for example, arranged in a maze-like manner, an S-shaped circuitous manner, etc., so that in the heating part 331, the total length of the resistance wire 33 per unit area is long, the resistance is large, and the heat generated per unit area of ​​the heating part 331 is large, thereby effectively heating the battery cell 30. Among them, the heating part 331 can be, for example, a sheet, and the outlet part 332 can be, for example, a cylindrical shape. The outlet part 332 is connected to a power source to provide electrical energy to the heating part 331.

[0068] It can be understood that the battery 10 may further include a plurality of heating components 32, and the plurality of heating components 32 may be connected to the same power source or to different power sources. For example, there may be two heating components 32, and the two heating components 32 are respectively arranged on both sides of the battery unit 30 along the second direction Y, and the two heating components 32 may be connected at one end of the first direction X through an outlet portion 332, and the two heating components 32 may have an outlet portion 332 connected to the power source at the other end of the first direction X, wherein the second direction Y is perpendicular to the first direction X.

[0069] The main body 41 is the part of the protective component 40 opposite to the heating member 32, and is used to cover at least part of the heating part 331 and isolate the heating part 331 from the adhesive 25. In the vertical direction Z, the height of the protective component 40 and the length of the first direction X can be the same as or different from the heating member 32, and are generally designed according to the overflow position of the adhesive 25. The heating part 331 is a functional component of the heating member 33. The main body 41 covers at least part of the heating part 331 of the heating member 32, which can prevent the overflowed adhesive 25 from adhering to the heating part 331, causing the heating part 331 to be short-circuited and ineffective, thereby ensuring the service life of the heating member 33.

[0070] In some embodiments, Figures 7 to 10 As shown, the main body 41 is connected to the battery unit 30 via a connector 411 , which includes a transverse connector 412 , which extends along a first direction X. In the vertical direction Z, the highest point of the transverse connector 412 is lower than the lowest point of the heating portion 331 .

[0071] The connector 411 is a part that connects the main body 41 and the battery cell 30, and is not connected to the heating part 331. The connector 411 may be solder, rivets, bolts, adhesives or glue, etc., which is not limited in this embodiment. The connector 411 includes a transverse connecting part 412, and the highest point of the transverse connecting part 412 in the vertical direction Z is lower than the lowest point of the heating part 331, that is, the transverse connecting part 412 does not contact the heating part 331.

[0072] The transverse connection part 412 connects the main body 41 and the battery cell 30, and the transverse connection part 412 is lower than the heating part 331, so that the gap between the main body 41 and the lower end of the battery cell 30 in the vertical direction Z is closed, reducing the possibility of the adhesive 25 flowing from the lower end of the main body 41 into contact with the heating part 331. At the same time, when the heating part 331 is stretched by the expanded battery cell 31, since the transverse connection part 412 is lower than the heating part 331, that is, the transverse connection part 312 is not in contact with the heating part 331, it is avoided that the heating part 331 is affected by the transverse connection part 412, and the possibility of the heating part 331 being partially broken by the shear force is avoided.

[0073] In some embodiments, Figures 7 to 10 As shown, the connecting member 411 also includes a first longitudinal connecting portion 413 and a second longitudinal connecting portion 414, which are respectively arranged at both ends of the main body portion 41 along the first direction X, and the first longitudinal connecting portion 413 and the second longitudinal connecting portion 414 both extend along the vertical direction Z, and the heating portion 331 is located between the first longitudinal connecting portion 413 and the second longitudinal connecting portion 414 along the first direction X.

[0074] The first longitudinal connection part 413 and the second longitudinal connection part 414 can be the same connection part or different connection parts. For example, the first longitudinal connection part 413 is a tape and the second longitudinal connection part 414 is an adhesive; or the first longitudinal connection part 413 and the second longitudinal connection part 414 are both tapes; or the first longitudinal connection part 413 is an adhesive and the second longitudinal connection part 414 is a tape. It is understandable that the first longitudinal connection part 413 and the second longitudinal connection part 414 can also be other connection parts, and the first longitudinal connection part 413 and the second longitudinal connection part 414 do not contact the heating part 331.

[0075] The first longitudinal connection portion 413 and the second longitudinal connection portion 414 are arranged at both ends of the main body 41 along the first direction X and are connected to the battery cell 30, so as to close the channels between the main body 41 and the battery cell 30 at both ends in the first direction X, thereby reducing the adhesive 25 or other foreign matter such as burrs from entering the heating portion 331 from both ends of the main body 41 in the first direction X, thereby affecting the normal operation of the heating portion 331.

[0076] In some embodiments, Figure 7 As shown, along the vertical direction Z, the first longitudinal connection portion 413 and the second longitudinal connection portion 414 are both connected to the transverse connection portion 412 .

[0077] The connection may be butt joint or partial overlap, as long as there is no gap between the first longitudinal connection part 413 , the second longitudinal connection part 414 and the transverse connection part 412 .

[0078] The first longitudinal connection part 413 and the second longitudinal connection part 414 are both connected to the transverse connection part 412, so that there is no gap between the first longitudinal connection part 413, the second longitudinal connection part 414 and the transverse connection part 412 respectively, which can prevent the adhesive 25 or other foreign matter such as burrs from entering the gap between the main body part 41 and the battery cell 30 through the gap between the first longitudinal connection part 413 and the second longitudinal connection part 414 and the transverse connection part 412, and affecting the heating part 331.

[0079] In some embodiments, Figures 8 to 10 As shown, the protective assembly 40 also includes a first extension portion 42, which is located at one end of the main body 41 away from the bottom of the battery 10 along the vertical direction Z, and the beam 23 of the box body 20 is located on the side of the main body 41 away from the battery cell 30. A gap is formed between the beam 23 and the main body 41, and at least part of the adhesive 25 is located in the gap. The first extension portion 42 extends from the main body 41 toward the direction of the beam 23 of the box body 20 to block the gap.

[0080] A gap is usually reserved between the beam 23 and the main body 41 for installing the battery unit 30 to prevent the heating component 32 from interfering with the beam 23 and causing wear during assembly.

[0081] The first extension portion 42 may block the gap partially or completely, that is, along the vertical direction Z, the projection of the first extension portion 42 partially overlaps with the projection of the gap, or the first extension portion 42 completely covers the gap.

[0082] The adhesive 25 will gradually move upward along the gap in the vertical direction Z. When the adhesive 25 content is high, it may overflow from the outlet of the gap to other locations, affecting the use of other components. The first extension portion 42 is used to block the possibility of the adhesive 25 overflowing from the gap and affecting other components.

[0083] In some embodiments, Figures 8 to 10 As shown, a protrusion 421 is provided at one end of the first extension portion 42 away from the main body portion 41 , and the protrusion 421 extends downward along the vertical direction Z.

[0084] The protrusion 421 protrudes downward along the vertical direction Z from one end of the first extension portion 42 away from the main body portion 41 , wherein in some examples, the protrusion 421 may contact the beam 23 to increase the strength of the first extension portion 42 and reduce deformation of the first extension portion 42 .

[0085] In some examples, a plurality of oblique reinforcing ribs 44 may be provided between the bottom surface of the first extension portion 42 and the main body portion 41 to improve the strength of the first extension portion 42. The sizes of the reinforcing ribs 44 may be the same or different. The reinforcing ribs 44 may connect the first extension portion 42 and the main body portion 41 by gluing, bolting, riveting or integral molding, and the reinforcing ribs 44 may improve the strength of the first extension portion 42 and enhance the ability of the first extension portion 42 to resist the impact of the adhesive 25.

[0086] In some embodiments, Fig. 9 and Fig.10 As shown, the first extension portion 42 abuts against the beam 23 to prevent the adhesive 25 from overflowing from the gap.

[0087] The first extension portion 42 abuts against the beam 23 , and the first extension portion 42 may abut against the beam 23 in the vertical direction Z, or may abut against the beam 23 in the second direction Y.

[0088] The abutment between the first extension portion 42 and the beam 23 can further prevent the adhesive 25 from overflowing from the gap to other locations and affecting the use of other components.

[0089] In some embodiments, Fig. 9 and Fig.10 As shown, the bottom surface of the first extension portion 42 along the vertical direction Z abuts against the beam 23 .

[0090] The bottom surface of the first extension portion 42 along the vertical direction Z abuts against the beam 23. The bottom surface of the first extension portion 42 along the vertical direction Z abuts against the beam 23 to prevent the adhesive 25 from overflowing from the gap to other locations and affecting the use of other components. It can also improve the strength of the first extension portion 42 and reduce the deformation of the first extension portion 42.

[0091] In some embodiments, Figures 8 to 10 As shown, the protective assembly 40 also includes a second extension portion 43, which is located at one end of the main body 41 close to the bottom of the battery 10 along the vertical direction Z. The second extension portion 43 extends from the main body 41 toward the direction close to the battery cell 30. The second extension portion 43 is arranged between the bottom of the battery cell 30 and the box body 20, and abuts against the battery cell 30 along the vertical direction Z.

[0092] The second extension portion 43 is located between the bottom of the battery cell 30 and the box body 20 , and is connected to the battery cell 30 , so as to stably fix the protection assembly 40 on the side of the battery cell 30 .

[0093] The second extension portion 43 can provide a positioning function when installing the protection component 40 , thereby facilitating the installation of the protection component 40 .

[0094] In some embodiments, Fig.10 As shown, the thickness of the second extension portion 43 is greater than the thickness of the main body portion 41 .

[0095] The second extension portion 43 has a large thickness, which can prevent foreign matter such as burrs at the bottom of the box body 20 from damaging the battery cells 31 .

[0096] In some embodiments, Fig. 9 and Fig.10 As shown, an insulating member 24 is disposed between the bottom of the battery unit 30 and the box body 20 , and the thickness of the insulating member 24 is greater than the thickness of the second extension portion 43 .

[0097] The insulating member 24 is made of insulating material, and may be made of rubber, plastic or the like. The plastic may be PBT (Polybutylene terephthalate), PET (Polyethyleneterephthalate), PA (Polyamide) or the like.

[0098] The insulating member 24 increases the gap between the bottom of the battery cell 30 and the box body 20, allowing the adhesive 25 to spread, thereby providing a sufficient bonding area between the battery cell 30 and the box body 20. At the same time, the thickness of the insulating member 24 is greater than the thickness of the second extension portion 43, so that the adhesive 25 at the bottom of the battery cell 30 can overflow from the bottom to the side of the battery cell 30, increasing the bonding area and improving the connection strength.

[0099] In some embodiments, the protection component 40 is made of insulating material.

[0100] The protection component 40 is made of insulating material, which can improve the insulation protection performance of the battery unit 30 .

[0101] The above describes the battery and the electrical device of the embodiment of the present application. The following describes the method for manufacturing the battery of the embodiment of the present application. For the parts not described in detail, please refer to the aforementioned embodiments.

[0102] like Fig.11 As shown, the present application provides a method for manufacturing a battery 10, including: step S100, arranging a plurality of battery cells 31 along a first direction X to form a battery unit 30; step S200, disposing a heating component 32 on a side of the battery unit 30; step S300, covering at least a portion of the heating component 32 with a protective component 40; step S400, connecting the box 20 and the battery unit 30 through an adhesive 25.

[0103] The protection component 40 can isolate the adhesive 25 from the heating component 32 to prevent the adhesive 25 from overflowing and causing the heating component 32 to fail, thereby improving the performance of the battery 10 .

[0104] The execution order of step S200 and step S300 is not limited in this application. For example, step S200 is executed first, and then step S300; or step S300 is executed first, and then step S200.

[0105] 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: A battery unit, comprising a plurality of battery cells arranged in a first direction; A box body, used to accommodate the battery unit, the box body is connected to the battery unit through an adhesive; A heating component is disposed on a side of the battery unit; and A protection component covers at least a portion of the heating component to isolate the adhesive from the heating component.

2. The battery according to claim 1, characterized in that The resistance wire of the heating component includes a connected heating part and a wire outlet part, the heating part is used to provide heat to the battery unit, and the wire outlet part is used to connect to a power source. The protective component includes a main body part, and the main body part covers at least part of the heating part.

3. The battery according to claim 2, characterized in that The main body is connected to the battery unit via a connector, and the connector includes a transverse connecting portion extending along the first direction. In the vertical direction, the highest point of the transverse connecting portion is lower than the lowest point of the heating portion.

4. The battery according to claim 3, characterized in that The connecting member also includes a first longitudinal connecting portion and a second longitudinal connecting portion, the first longitudinal connecting portion and the second longitudinal connecting portion are respectively arranged at the two ends of the main body along the first direction, and the first longitudinal connecting portion and the second longitudinal connecting portion both extend along the vertical direction, and the heating portion is located between the first longitudinal connecting portion and the second longitudinal connecting portion along the first direction.

5. The battery according to claim 4, characterized in that Along the vertical direction, the first longitudinal connection portion and the second longitudinal connection portion are both connected to the transverse connection portion.

6. The battery according to any one of claims 2 to 5, characterized in that: The protective assembly also includes a first extension portion, which is located at one end of the main body away from the bottom of the battery in the vertical direction, and the beam of the box body is located on a side of the main body away from the battery cell. A gap is formed between the beam and the main body, and at least part of the adhesive is located in the gap. The first extension portion extends from the main body toward the beam of the box body to cover the gap.

7. The battery according to claim 6, characterized in that A protrusion is provided at one end of the first extension portion away from the main body portion, and the protrusion extends downward along the vertical direction.

8. The battery according to claim 6, characterized in that The first extension portion abuts against the beam to prevent the adhesive from overflowing from the gap.

9. The battery according to claim 8, characterized in that A bottom surface of the first extension portion along the vertical direction abuts against the beam.

10. The battery according to claim 2, characterized in that The protective assembly also includes a second extension portion, which is located at one end of the main body close to the bottom of the battery in the vertical direction, and the second extension portion extends from the main body toward the direction close to the battery cell. The second extension portion is arranged between the bottom of the battery cell and the box body, and abuts against the battery cell in the vertical direction.

11. The battery according to claim 10, characterized in that The thickness of the second extension portion is greater than the thickness of the main body portion.

12. The battery according to claim 11, characterized in that An insulating member is disposed between the bottom of the battery unit and the box body, and a thickness of the insulating member is greater than a thickness of the second extension portion.

13. The battery according to claim 12, characterized in that The protective component is made of insulating material.

14. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

15. A method for manufacturing a battery, characterized in that: include: Arrange a plurality of battery cells along a first direction to form a battery unit; Disposing a heating member on a side of the battery unit; Covering at least a portion of the heating element with a protective assembly; The box body and the battery unit are connected by adhesive.

Images