Battery

Abstract

The utility model relates to the technical field of battery energy, in particular to a battery, which comprises a battery cell, a circuit board and a battery packaging structure, the battery packaging structure comprises a protective film, a circuit board reinforcing sheet and an outer frame reinforcing sheet, the protective film comprises a placing part and a coating part, and the battery cell, the circuit board reinforcing sheet, the outer frame reinforcing sheet and the circuit board are fixedly adhered to the placing part. The wrapping part is arranged on the placing part and adheres and fixes the battery cell and the circuit board, the wrapping part and the placing part wrap the battery cell, the circuit board reinforcing sheet, the outer frame reinforcing sheet and the circuit board, the circuit board reinforcing sheet is opposite to the circuit board, and the outer frame reinforcing sheet surrounds the battery cell and adheres to the wrapping part and the placing part. By canceling a plastic rubber frame and optimizing the structure of the battery, the plastic pollution to the environment is reduced, the waste of materials is reduced, the production cost is saved, the weight of the battery is also reduced, the transportation cost and the energy consumption are reduced, and the capacity and the energy density of the battery are improved due to the reduction of the plastic rubber frame in the battery.

Description

Technical Field

[0001] The present application relates to the field of battery energy technology, and in particular to a battery. Background Art

[0002] The plastic frame of the laptop plastic battery is usually an important component that fixes the battery cell and the battery circuit board. Its thickness is usually greater than or equal to the thickness of the battery cell, occupying the available space of the battery, thereby reducing the battery capacity. In addition, plastic pollution has become a global problem. The waste generated during the use of plastic products has a serious impact on the environment and ecosystem.

[0003] Therefore, there is an urgent need to provide a battery that does not take up space and does not cause plastic pollution. Utility Model Content

[0004] Based on this, the present application provides a battery to solve the problems in the related art of plastic pollution, occupying battery space and weight, and affecting battery capacity and battery energy density.

[0005] On the one hand, the present application provides a battery, including a battery cell, a circuit board and a battery packaging structure, the battery packaging structure including a protective film, a circuit board reinforcement sheet and an outer frame reinforcement sheet, the protective film including a placement portion and a covering portion, the battery cell, the circuit board reinforcement sheet, the outer frame reinforcement sheet and the circuit board are adhesively fixed to the placement portion, the covering portion is arranged in the placement portion and adhesively fixes the battery cell and the circuit board, the covering portion and the placement portion cover the battery cell, the circuit board reinforcement sheet, the outer frame reinforcement sheet and the circuit board, the circuit board reinforcement sheet is opposite to the circuit board, and the outer frame reinforcement sheet surrounds the battery cell and is adhesively bonded to the covering portion and the placement portion.

[0006] In a possible implementation, the placement portion and the covering portion are an integrally formed structure, the placement portion is an upper half of the integrally formed structure, and the covering portion is a lower half of the integrally formed structure.

[0007] In a possible implementation, the outer frame reinforcement plate includes a fixed portion, a surrounding portion and a middle portion, the fixed portion and the surrounding portion are connected end to end to form a polygonal area, the middle portion is located in the ring of the polygonal area, and the surrounding portion is provided with a perforation.

[0008] In a possible implementation manner, the middle portion and the circuit board reinforcement sheet are respectively located on two opposite sides of the circuit board.

[0009] In a possible implementation manner, an edge of the surrounding portion is flush with an edge of the placement portion.

[0010] In a possible implementation, the width dimension of the fixing portion and the surrounding portion is Q value, and the aperture dimension of the through hole is X value; Q value and X value satisfy the relationship: X<Q.

[0011] In a possible implementation, the Q value ranges from 4.0 mm to 10.0 mm.

[0012] In a possible implementation, the placement portion and the covering portion are provided with openings, and the positions of the openings and the perforations correspond to each other.

[0013] In a possible implementation, the opening on the covering portion is a hole that penetrates the edge of the protective film, the diameter dimension of the opening on the covering portion is P value, the depth dimension is O value, and the aperture dimension of the perforation is X value; X value, P value and O value satisfy the relationship: P>X, O>X.

[0014] In a possible implementation, the protective film has a uniform thickness, and the thickness dimension is a V value, which ranges from 0.05 mm to 0.1 mm.

[0015] In a possible implementation, the thickness dimension of the outer frame reinforcement sheet is U value, the thickness dimension of the circuit board reinforcement sheet is W value, and the U value and the W value satisfy the relationship: U<W.

[0016] In a possible implementation, the value of W ranges from 0.1 mm to 0.3 mm.

[0017] In a possible implementation, the U value ranges from 0.1 mm to 0.3 mm.

[0018] In a possible implementation, the width of the outer periphery of the outer frame reinforcement piece ranges from 4 mm to 10 mm, and the thickness of the bonding area between the outer frame reinforcement piece and the covering portion and the placement portion ranges from 0.2 mm to 0.5 mm.

[0019] In a possible implementation, the thickness of the battery at the center where the battery cell is disposed is greater than the thickness of the battery at the periphery where the outer frame reinforcement sheet is disposed.

[0020] The battery provided by the present application completely wraps the battery cell and circuit board structure therein through the placement part and the covering part of the protective film, and strengthens the strength of the circuit board position in the packaging structure through the circuit board reinforcement sheet opposite to the circuit board, and strengthens the outer frame strength of the packaging structure through the outer frame reinforcement sheet located outside the battery cell, thereby improving the stability, aesthetics and safety of the battery pack. After the battery packaging structure covers the battery cell and the circuit board, the battery packaging structure is pressed together so that the outer frame reinforcement sheet is bonded to the covering part and the placement part to form a battery. The protective film can be used to seal the battery cell in all directions, making it waterproof, moisture-proof and dust-proof, preventing water vapor from invading the battery, and then entering the battery cell, reacting with the electrolyte to generate hydrofluoric acid, and then damaging the SEI film of the negative electrode sheet. The plastic frame has been eliminated, the battery structure has been optimized and simplified, making it easy to disassemble and replace, and easier to recycle, which is beneficial to the recycling of resources and reduces plastic pollution to the environment, which is beneficial to environmental protection, reduces material waste, saves production costs, and reduces the weight of the battery, which helps reduce transportation costs and energy consumption. In addition, due to the reduction of the plastic frame in the battery, the space utilization rate of the battery compartment can be improved, which is beneficial to improving the battery capacity and the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the structure of a battery cell in a battery provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 A side view of the battery cell shown;

[0024] Figure 3 A schematic diagram of the structure of a circuit board in a battery provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of welding a battery cell and a circuit board in a battery provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of a battery packaging structure in a battery provided in an embodiment of the present application;

[0027] Figure 6 for Figure 5 A side view of the battery packaging structure shown;

[0028] Figure 7 for Figure 5 Schematic diagram of the exploded structure of the battery packaging structure shown;

[0029] Figure 8 A schematic diagram of a structure in which a battery core unit provided in an embodiment of the present application is attached to a battery packaging structure;

[0030] Fig. 9 A schematic diagram of the structure of the battery packaging structure provided in an embodiment of the present application encapsulating a battery core unit;

[0031] Fig.10 A schematic diagram of the structure of the battery packaging structure provided in an embodiment of the present application after the battery core unit is wrapped;

[0032] Fig.11 This is a schematic diagram of the structure of a pressing fixture for a battery packaging structure in an embodiment of the present application;

[0033] Fig.12 This is a schematic diagram of the structure of the battery after the battery packaging structure is pressed together in the embodiment of the present application;

[0034] Fig.13 Schematic diagram of the structure of the battery in the embodiment of the present application.

[0035] Description of reference numerals:

[0036] 100-battery; 10-battery cell; 11-battery cell body; 12-positive electrode ear; 13-negative electrode ear; 14-peak groove; 15-battery cell protector; 20-circuit board; 21-circuit board body; 22-connector; 23-connecting wire; 24-temperature sensor; 110-battery core unit; 120-battery packaging structure; 121-protective film; 122-circuit board reinforcement sheet; 123-outer frame reinforcement sheet; 131-fixing part; 132-surrounding part; 133-middle part; 124-placing part; 125-coating part; 126-perforation; 127-opening; 201-pressing jig lower mold; 202-pressing jig upper mold; 203-pressing groove; 204-pressing cavity. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0038] 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, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] The terms "first", "second" and "third" (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0041] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0042] At present, plastic pollution has become a global problem. The waste generated during the use of plastic products has a serious impact on the environment and ecosystem. As global environmental issues become increasingly prominent, people's attention to plastic pollution and environmental damage has gradually increased. Many regions are restricting the use of plastics and encouraging the development of environmentally friendly products, which has promoted the development of environmentally friendly products such as plastic-free plastic frame batteries.

[0043] On the other hand, the plastic frame in the plastic frame battery is usually an important part for fixing the battery cells and other components. The existence of the plastic frame will take up a certain amount of space, and the size and shape of the frame will usually vary depending on the type and specification of the battery. The plastic frame in the battery with a plastic frame occupies the available space of the battery, resulting in a reduction in battery capacity, and the use of the plastic frame also increases the weight of the battery, resulting in increased production and transportation costs and energy consumption.

[0044] After repeated thinking and verification, the inventor found that if the design structure that uses the plastic frame bracket as a carrier in the traditional design is abandoned, and the battery cells and circuit boards in the battery are completely wrapped by a composite protective film to form a battery, it will not only optimize and simplify the battery structure, but also be easy to disassemble, convenient for users to replace, and easier to recycle, which is beneficial to the recycling of resources. The plastic frame is eliminated, and plastic pollution to the environment is reduced, which is beneficial to environmental protection. The weight of the battery will also be reduced, reducing material waste, helping to reduce transportation costs and energy consumption. In addition, due to the reduction of the plastic frame in the battery, the space utilization rate of the battery compartment can also be improved, which is beneficial to improving the battery capacity and the energy density of the battery.

[0045] In view of this, the present application provides a battery, including a battery cell, a circuit board and a battery packaging structure, the battery packaging structure including a protective film, a circuit board reinforcement sheet and an outer frame reinforcement sheet, the protective film including a placement portion and a covering portion, the battery cell, the circuit board reinforcement sheet, the outer frame reinforcement sheet and the circuit board are adhesively fixed to the placement portion, the covering portion is arranged on the placement portion and adhesively fixes the battery cell and the circuit board, the covering portion and the placement portion cover the battery cell, the circuit board reinforcement sheet, the outer frame reinforcement sheet and the circuit board, the circuit board reinforcement sheet is opposite to the circuit board, the outer frame reinforcement sheet surrounds the battery cell and is adhesively bonded to the covering portion and the placement portion.

[0046] The placement part and the covering part of the protective film completely wrap the battery cell and the circuit board structure, and the circuit board reinforcement sheet opposite to the circuit board is used to strengthen the strength of the circuit board position in the packaging structure, and the outer frame reinforcement sheet located outside the battery cell is used to strengthen the outer frame strength of the packaging structure, thereby improving the stability, aesthetics and safety of the battery pack. After the battery packaging structure covers the battery cell and the circuit board, the battery packaging structure is pressed together so that the outer frame reinforcement sheet is bonded to the covering part and the placement part to form a battery. The protective film can be used to seal the battery cell in all directions, making it waterproof, moisture-proof and dust-proof, preventing water vapor from invading the battery, and then entering the battery cell, reacting with the electrolyte to generate hydrofluoric acid, and then damaging the SEI film (Solid Electrolyte Interface) of the negative electrode sheet. The plastic frame has been eliminated, the battery structure has been optimized and simplified, making it easy to disassemble and replace, and easier to recycle, which is beneficial to the recycling of resources and reduces plastic pollution to the environment, which is beneficial to environmental protection, reduces material waste, saves production costs, and reduces the weight of the battery, which helps reduce transportation costs and energy consumption. In addition, due to the reduction of the plastic frame in the battery, the space utilization rate of the battery compartment can be improved, which is beneficial to improving the battery capacity and the energy density of the battery.

[0047] The contents of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application more clearly and in detail.

[0048] Figure 1 A schematic diagram of the structure of a battery cell in a battery provided in an embodiment of the present application. Figure 2 for Figure 1 Side view of the battery cell shown. Figure 3 A schematic diagram of the structure of a circuit board in a battery provided in an embodiment of the present application. Figure 4 A schematic diagram of the structure of welding a battery cell and a circuit board in a battery provided in an embodiment of the present application. Figure 5 A schematic diagram of the structure of the battery packaging structure in the battery provided in an embodiment of the present application. Figure 6 for Figure 5 Side view of the battery packaging structure shown. Figure 7 for Figure 5 Schematic diagram of the exploded structure of the battery packaging structure shown. Figure 8 A schematic diagram of the structure in which the battery core unit provided in an embodiment of the present application is attached to the battery packaging structure. Fig. 9 A schematic diagram of the structure of the battery packaging structure provided in an embodiment of the present application encapsulating a battery core unit. Fig.10 A schematic diagram of the structure of the battery packaging structure provided in an embodiment of the present application after the battery core unit is wrapped. Fig.11 Schematic diagram of the structure of the pressing fixture of the battery packaging structure in the embodiment of the present application. Fig.12It is a schematic diagram of the structure of the battery after the battery packaging structure is pressed in the embodiment of the present application. Fig.13 Schematic diagram of the structure of the battery in the embodiment of the present application.

[0049] like Figure 1 and Figure 2 As shown, the battery cell 10 includes a battery cell body 11, a positive electrode tab 12, and a negative electrode tab 13. The positive electrode tab 12 and the negative electrode tab 13 are respectively arranged on the battery cell body 11.

[0050] The battery cell body 11 is a part of the battery cell 10 for storing electric energy. The length dimension of the battery cell body 11 is A value, the width dimension is B value, and the thickness dimension is C value.

[0051] The positive electrode tab 12 and the negative electrode tab 13 are used to transmit electric energy in the battery cell 10. The width dimension of the positive electrode tab 12 and the negative electrode tab 13 is D value.

[0052] There is a peak groove 14 at the top of the battery cell body 11, and the positive electrode tab 12 and the negative electrode tab 13 are respectively arranged in the peak groove 14 at the top of the battery cell body 11. The depth dimension of the peak groove 14 is the E value.

[0053] Preferably, the width D of the tab is in the range of 6 mm to 8 mm, and the depth E of the peak groove 14 is in the range of 2.5 mm to 3.5 mm.

[0054] In some embodiments, the battery cell 10 further includes a battery cell protector 15. The battery cell protector 15 is also disposed in the peak groove 14 at the top of the battery cell body 11. The battery cell protector 15 is also called a breaker, and is used to control the current of the battery cell 10 in the battery to protect the battery cell 10.

[0055] like Figure 3 As shown, the circuit board 20 includes a circuit board body 21, a connecting member 22 and a connecting line 23. The connecting member 22 and the connecting line 23 are respectively arranged on the circuit board body 21.

[0056] The circuit board 20 is the control unit of the battery. The circuit board body 21 is where the main circuits of the control unit are located, and is used to connect various components to achieve various functions of the circuit board 20. The connector 22 is used to connect to the positive tab 12 or the negative tab 13 on the battery cell 10 to achieve the connection between the circuit board 20 and the battery cell 10. The connecting wire 23 is used to connect to the port connected to the system to achieve the charging and discharging function of the battery.

[0057] The shape of the circuit board body 21 is determined by the shape of the battery core unit that constitutes the battery. In this embodiment, the length dimension of the circuit board body 21 is H value, the upper width dimension is F value, and the lower width dimension is G value.

[0058] Preferably, the length dimension H of the circuit board body 21 is less than or equal to the dimension in the corresponding direction on the battery core unit, that is, the circuit board body 21 is covered in the battery core unit in the length direction, thereby reducing the overall length of the battery.

[0059] The upper width dimension and the lower width dimension are related to the layout of the overcurrent inside the battery.

[0060] Preferably, the upper width dimension F and the lower width dimension G are in the range of 4.0 mm to 20.0 mm.

[0061] The thickness of the circuit board body 21 is also related to the layout of the overcurrent inside the battery. Preferably, the thickness of the circuit board body 21 is in the range of 0.6 mm to 2.0 mm.

[0062] The connector 22 is a metal conductor on the circuit board body 21 , and is used as a connecting medium for connecting the battery cells 10 . Metals such as nickel, copper, and aluminum are commonly used.

[0063] Preferably, the connecting member 22 is made of nickel sheet.

[0064] The connection line 23 is a connector terminal line on the circuit board body 21, and is used to connect to a connection port of the system in the packaged battery.

[0065] In some embodiments, the circuit board 20 further includes a temperature sensor 24. The temperature sensor 24 is disposed on the circuit board body 21 and functions to monitor the temperature of the battery cell 10 to prevent the battery from being overcharged, over-discharged, or over-current to protect the battery.

[0066] In some embodiments, other components are also disposed on the circuit board body 21, such as IC (integrated circuit), MOS (Metal-Oxide-Semiconductor Field-Effect Transistor), resistors, transistors, etc.

[0067] like Figure 4 , which is a schematic structural diagram of a battery core unit 110 after the battery cell 10 and the circuit board 20 are welded.

[0068] The battery cell 10 and the circuit board 20 are placed horizontally, and the positive electrode tab 12 and the negative electrode tab 13 of the battery cell 10 are respectively stacked with the corresponding connectors 22 of the circuit board 20. The positive electrode tab 12 and the negative electrode tab 13 are respectively welded to the corresponding connectors 22, thereby forming a battery core unit 110.

[0069] The welding connection can be performed by laser welding, resistance welding, soldering, etc., without specific limitation. It is understandable that any method can be used as long as the positive electrode ear 12, the negative electrode ear 13 and the corresponding connector 22 can be connected and tightened.

[0070] After connection, there is a gap between adjacent battery cells 10 , and the size of the gap is M value.

[0071] Preferably, the gap size M ranges from 0 mm to 1.0 mm.

[0072] After the connection, there is a gap between the battery cell body 11 and the circuit board body 21 of the circuit board 20 , and the size of the gap is N value.

[0073] Preferably, the interval dimension N value is greater than 0 mm, in order to prevent interference between the cell body 11 and the circuit board body 21 , which is not conducive to subsequent coating, and there is also a short circuit problem when the cell body 11 and the circuit board body 21 are in contact.

[0074] After the connection, the length dimension of the battery core unit 110 is K value, the upper width dimension is J value, and the lower width dimension is L value.

[0075] Preferably, the K value, J value and L value satisfy the relationship: K=B*2+M, J=A*2+N*2+F, L=A*2+N*2+G.

[0076] Preferably, the length dimension H of the circuit board body 21 is ≤ the length dimension K of the battery core unit 110 .

[0077] like Figure 5 , Figure 6 and Figure 7 , which is a schematic structural diagram of a battery packaging structure 120 provided in the present application.

[0078] The battery packaging structure 120 includes a protective film 121, a circuit board reinforcement sheet 122, and an outer frame reinforcement sheet 123. The circuit board reinforcement sheet 122 and the outer frame reinforcement sheet 123 are respectively arranged on the protective film 121. The protective film 121 is used to cover the battery cell 10 and the circuit board 20. The circuit board reinforcement sheet 122 is opposite to the wrapped circuit board 20, and the outer frame reinforcement sheet 123 surrounds the wrapped battery cell 10, that is, it is located on the outside of the wrapped battery cell 10.

[0079] Specifically, the shape of the protective film 121 is determined by the shape of the battery core unit 110 . The shape of the circuit board reinforcement sheet 122 is determined by the shape of the circuit board 20 . The shape of the outer frame reinforcement sheet 123 is also determined by the shape of the battery core unit 110 .

[0080] The circuit board reinforcement sheet 122 and the outer frame reinforcement sheet 123 are respectively compounded on the protection film 121 .

[0081] Preferably, the circuit board reinforcement sheet 122 and the outer frame reinforcement sheet 123 are bonded to the protective film 121 by gluing.

[0082] The protective film 121 includes a placement portion 124 and a covering portion 125 . The placement portion 124 is used to place the battery cell 10 and the circuit board 20 . The covering portion 125 is connected to the placement portion 124 . The covering portion 125 is used to cooperate with the placement portion 124 to cover the battery cell 10 and the circuit board 20 after being folded.

[0083] The shapes of the placement portion 124 and the covering portion 125 are symmetrical along the axis of connection between the covering portion 125 and the placement portion 124 .

[0084] Preferably, the placement portion 124 and the covering portion 125 are an integrally formed structure, the placement portion 124 is an upper half of the integrally formed structure, and the covering portion 125 is a lower half of the integrally formed structure.

[0085] A composite membrane material is preferably used, so that one side of the wrapped battery cell 10 and the circuit board 20 can be directly sealed, and after subsequent pressing, the remaining three sides of the wrapped battery cell 10 and the circuit board 20 are sealed, thereby sealing the battery cell 10 in all directions to prevent water vapor from invading the battery and then entering the interior of the battery cell 10 to react with the electrolyte to generate hydrofluoric acid, thereby damaging the SEI film of the negative electrode sheet.

[0086] Preferably, the material of the protective film 121 is PET (Polyethylene terephthalate), which has good mechanical properties, heat resistance, chemical resistance, electrical insulation and barrier properties, and can also be recycled to reduce pollution to the environment.

[0087] In some embodiments, the protective film 121 has a uniform thickness, and the thickness dimension is a V value.

[0088] Preferably, the thickness dimension V of the protective film 121 ranges from 0.05 mm to 0.1 mm.

[0089] Preferably, the circuit board reinforcing sheet 122 is made of a relatively hard material such as PC (Polycarbonate) plastic.

[0090] Since there are many electronic components on the surface of the circuit board 20, and the heights of different components are inconsistent, and the peak groove 14 on the battery body 11 is inconsistent with the height of the battery body 11, at the same time, there is a gap N value between the battery body 11 and the circuit board body 21 after welding, and the battery protector 15 in the peak groove 14 also has a certain height. Ultimately, the battery will be uneven within this area. If the protective film 121 is directly attached to the surface of this area, the appearance of the battery pack finally formed in this area will appear uneven. Therefore, attaching a circuit board reinforcement sheet 122 in this area can play a role in smoothing the pits, so that the appearance of the battery pack in this area can be smooth. It can also prevent the components with unevenness in this area from puncturing the protective film 121 during pressing or subsequent use, causing safety problems.

[0091] The thickness dimension of the circuit board reinforcing sheet 122 attached to the protective film 121 is W value.

[0092] Preferably, the thickness dimension W of the circuit board reinforcing sheet 122 is in the range of 0.1 mm to 0.3 mm. The greater the thickness, the higher the flatness of the battery pack formed in this area.

[0093] Preferably, the outer frame reinforcing sheet 123 is made of a harder material such as PC (Polycarbonate) plastic or metal.

[0094] Since the battery needs to be installed through screw punching and positioning holes after forming, in order to prevent the protective film 121 from being torn during the subsequent punching and positioning hole processes, and the outer frame reinforcement sheet 123 can also provide support for the battery core unit 110 after the battery is formed, the outer frame reinforcement sheet 123 is needed to provide enhanced fixation and protection for the battery.

[0095] The thickness dimension of the outer frame reinforcing sheet 123 attached to the protective film 121 is the U value.

[0096] Preferably, the thickness dimension U value of the outer frame reinforcement sheet 123 is in the range of 0.1 mm to 0.3 mm. The greater the thickness, the higher the protective strength of the battery pack.

[0097] Preferably, the thickness dimension U value of the outer frame reinforcement sheet 123 is less than the thickness dimension W value of the circuit board reinforcement sheet 122 .

[0098] Since the thickness of the battery cell 10 is thicker than that of the circuit board 20 , when the U value is less than the W value, the surface flatness of the battery after coating can be improved.

[0099] In some embodiments, the outer frame reinforcement sheet 123 with different thicknesses may be designed, and the thickness may be locally thickened at the screw holes and positioning holes to enhance the fixation and strength of the screw holes and positioning holes.

[0100] The outer frame reinforcement piece 123 includes a fixing part 131, a surrounding part 132 and an intermediate part 133. The fixing part 131 and the surrounding part 132 are connected end to end to enclose a polygonal area, and the intermediate part 133 is located in the polygonal area.

[0101] In this embodiment, the outer frame reinforcement piece 123 is generally in the shape of a Chinese character 'Ri'.

[0102] The surrounding part 132 is provided with perforations 126. After the battery is formed, the perforations 126 are used for screws to pass through to realize the positioning and fixed installation of the battery.

[0103] The number and position of the perforations 126 are determined according to the number and position of the positioning and locking holes in the battery compartment of the host adapted to the battery.

[0104] The edge of the surrounding part 132 is flush with the edge of the placement part 124.

[0105] The outer periphery of the outer frame reinforcement piece 123, that is, the width dimension of the fixing part 131 and the surrounding part 132 is the Q value. The aperture dimension of the perforation 126 is the X value.

[0106] Preferably, the Q value and the X value satisfy the relationship: X < Q, that is, the perforation 126 does not penetrate the outer periphery of the outer frame reinforcement piece 123, avoiding the fracture of the perforation 126 during use and affecting the locking and fixing effect of the battery.

[0107] Preferably, the value range of the Q value is 4.0 mm - 10.0 mm.

[0108] On the placement part 124 and the covering part 125 of the protective film 121, openings 127 are provided corresponding to the positions of the perforations 126. The purpose of the openings 127 is to prevent the protective film 121 from covering the perforations 126 after covering the battery core unit 110, thus affecting the use of the perforations 126.

[0109] Preferably, the opening 127 on the placement part 124 has the same shape and size as the perforation 126, improving the strength of the perforation 126, thus preventing the perforation 126 from breaking during use and affecting the locking and fixing effect of the battery.

[0110] Preferably, the opening 127 on the covering part 125 is a hole penetrating the edge of the protective film 121, that is,开槽 is made from the periphery of the protective film 121. The diameter dimension of the opening 127 on the covering part 125 is the P value, and the depth dimension is the O value.

[0111] Preferably, the X value, the P value and the O value satisfy the relationship: P > X, O > X, avoiding the situation that the opening 127 on the covering part 125 covers the perforation 126 due to the position offset caused by the folding operation when the covering part 125 folds and encloses the battery core unit 110.

[0112] Preferably, the opening 127 on the covering portion 125 is rounded to improve the appearance of the molded battery.

[0113] In some embodiments, the shape of the opening 127 on the covering portion 125 can be circular or elliptical, and can also be designed as a square, rectangle, etc., without specific limitation. The shape of the opening 127 can be adjusted according to the usage.

[0114] Preferably, on the protective film 121 , the right angles of the circuit board reinforcement sheet 122 and the outer frame reinforcement sheet 123 need to be rounded to prevent the protective film 121 from tearing.

[0115] The middle portion 133 and the circuit board reinforcing sheet 122 are respectively located on two opposite sides of the circuit board 20 , and are used to protect the circuit board 20 from both sides of the enclosed circuit board 20 .

[0116] Specifically, the upper width dimension of the middle portion 133 and the circuit board reinforcing sheet 122 is R value, and the lower width dimension is S value. The length dimension of the circuit board reinforcing sheet 122 is T value.

[0117] Preferably, the R value and the S value satisfy the relationship: R≤E*2+N*2+F, S≤E*2+N*2+G.

[0118] Preferably, the length dimension T of the circuit board reinforcing sheet 122 is ≤ the length dimension K of the battery core unit 110 .

[0119] In some embodiments, the fixing portion 131 , the surrounding portion 132 , and the middle portion 133 may be multiple separate sheets, and they only need to be disposed at locations where the through holes 126 and the circuit board 20 need to be opened, thereby saving materials.

[0120] In other embodiments, the fixing portion 131, the surrounding portion 132 and the middle portion 133 are connected as a whole, that is, integrally formed, so as to improve the overall strength of the outer frame reinforcement sheet 123, enhance the protection strength of the battery, and facilitate the positioning of the outer frame reinforcement sheet 123 on the protective film 121 to improve production efficiency.

[0121] In other embodiments, the middle portion 133 may also directly use the circuit board reinforcement sheet 122. In this case, the fixed portion 131, the surrounding portion 132 and the middle portion 133 may be made of different materials. For example, the fixed portion 131 and the surrounding portion 132 are made of metal, and the circuit board reinforcement sheet 122 is made of PC material, thereby reducing the amount of material shape processing, improving production efficiency, and reducing costs.

[0122] like Figure 8 , which is a structural schematic diagram of a battery core unit 110 attached to a battery packaging structure 120 .

[0123] When assembling the battery, the battery core unit 110 is first placed horizontally on the placement portion 124 and placed in the outer frame reinforcement sheet 123 of the placement portion 124 .

[0124] After attachment, there is a gap between the inner wall edge of the outer frame reinforcing sheet 123 and the edge of the battery cell 10 of the battery core unit 110 , and the size of the gap is a value.

[0125] Among them, the a value satisfies the relationship: a≥C / 2.

[0126] Preferably, a=C / 2, so that the space can be utilized to the maximum extent.

[0127] There is a gap between the edge of the circuit board reinforcing sheet 122 and the edge of the covering portion 125 , and the size of the gap is a value b.

[0128] Preferably, the b value satisfies the relationship: b=a+Q, so that the circuit board reinforcing sheet 122 can completely cover the circuit board body 21 and the uneven area in the peak groove 14 on the surrounding battery cell body 11 .

[0129] like Fig. 9 , which is a schematic structural diagram of a battery packaging structure 120 encapsulating a battery core unit 110 .

[0130] Will Figure 8 The state shown is defined as a flattened state, at which the battery core unit 110 is placed horizontally on the placement portion 124, the covering portion 125 is flipped 90° along the connection area between the covering portion 125 and the placement portion 124, and then flipped another 90° to cover the covering portion 125 on the other side of the battery core unit 110 to form a wrapped state.

[0131] like Fig.10 , which is a schematic structural diagram of the battery packaging structure 120 wrapping the battery core unit 110 .

[0132] In the wrapped state, due to the thickness of the battery cell 10 in the battery core unit 110 , there is a certain distance between the folded wrapping portion 125 and the outer frame reinforcement sheet 123 provided on the placement portion 124 , and they are not attached together to form a battery.

[0133] At this time, the opening 127 on the covering portion 125 is opposite to the through hole 126 on the outer frame reinforcing piece 123 .

[0134] like Fig.11 , which is a schematic structural diagram of a pressing fixture for a battery packaging structure 120 .

[0135] In order to make the covering portion 125 fit closely with the outer frame reinforcing sheet 123 on the lower placement portion 124 in the covering state, a pressing jig is required to perform a pressing process on them.

[0136] The pressing jig includes a pressing jig lower die 201 and a pressing jig upper die 202. The pressing jig lower die 201 is provided with a pressing groove 203. The pressing groove 203 is used to place the battery to be pressed, that is, the battery packaging structure 120 and the battery core unit 110 in the wrapped state. The pressing jig upper die 202 is provided with a pressing cavity 204.

[0137] The shape of the press-fit groove 203 is the same as that of the battery core unit 110. The depth of the press-fit groove 203 is C / 2.

[0138] The pressing cavity 204 is a through hole, and the shape of the pressing cavity 204 is the same as that of the battery core unit 110 .

[0139] Preferably, the edges of the pressing groove 203 and the pressing cavity 204 are rounded to prevent the battery cell 10 from being crushed during the pressing process.

[0140] like Fig.12 , which is a schematic structural diagram of a battery 100 formed after the battery packaging structure 120 is pressed together.

[0141] After the pressing, the covering portion 125 and the outer frame reinforcing sheet 123 disposed on the placement portion 124 are completely attached together, and the battery core unit 110 is sealed, thereby forming the battery 100 .

[0142] like Fig.13 , which is a schematic structural diagram of a battery 100 .

[0143] The circuit board reinforcing sheet 122 is wrapped in the protective film 121 and is located directly above the circuit board 20 .

[0144] like Fig.13 As shown, the embodiment of the present application provides a battery 100, including a battery packaging structure 120, a battery cell 10 and a circuit board 20. The battery cell 10 and the circuit board 20 are covered by a protective film 121, that is, they are covered between a placement portion 124 and a covering portion 125, and are sealed in the pressed battery packaging structure 120, that is, they are sealed by the pressed placement portion 124, the outer frame reinforcement sheet 123 and the covering portion 125.

[0145] The battery is not limited to lithium batteries, and in the future this technology may be applied to sodium batteries, etc. In the present application, lithium-ion batteries are preferred.

[0146] The specific structure, working principle and function of the battery packaging structure 120 have been described in detail in the above embodiments and will not be repeated here.

[0147] Furthermore, the perforations 126 on the outer frame reinforcement sheet 123 are adapted to the battery compartment on the host, and are positioned and locked together, which can reduce the process of separately assembling the battery and locking it, and is easy to disassemble, thus reducing costs, improving production efficiency, and also making it convenient for users to replace batteries.

[0148] The through hole 126 on the outer frame reinforcement sheet 123 can also be designed to have different shapes so as to adapt to various host battery compartments.

[0149] Preferably, the battery core unit 110 is completely covered on all sides by the protective film 121, and the width of the covered area, i.e., the outer periphery of the outer frame reinforcement sheet 123, the width of the fixed portion 131 and the surrounding portion 132 is in the range of 4mm-10mm, and the thickness of the area after lamination, i.e., the thickness of the bonding area between the outer frame reinforcement sheet 123 and the covering portion 125 and the placement portion 124 is in the range of 0.2mm-0.5mm.

[0150] A battery cell 10 is arranged in the middle of the battery 100, which is covered by a protective film 121 and an outer frame reinforcement sheet 123 on all sides. The thickness of the battery 100 at the position where the battery cell 10 is arranged in the middle is greater than the thickness of the battery 100 at the positions where the outer frame reinforcement sheets 123 are arranged on all sides. In addition, a perforation 126 in the battery 100 for adapting to the battery compartment of the main unit is located in the surrounding covering area of ​​the battery 100.

[0151] By setting the middle to be thicker than the surrounding areas, when the battery 100 is subsequently locked in a host, such as a battery compartment of a laptop computer, it can be avoided that the thickness of the surrounding areas is thicker than the middle area due to setting screws on the surrounding areas, thereby causing a waste of space in the thickness direction of the battery compartment.

[0152] The process structure of using the battery packaging structure 120 for coating is simple, which improves the efficiency and convenience of packaging.

[0153] The battery 100 provided in the present application includes a battery cell 10, a circuit board 20 and a battery packaging structure 120. The battery packaging structure 120 includes a protective film 121, a circuit board reinforcement sheet 122 and an outer frame reinforcement sheet 123. The circuit board reinforcement sheet 122 and the outer frame reinforcement sheet 123 are respectively arranged on the protective film 121. The protective film 121 includes a placement portion 124 and a covering portion 125. The battery cell 10 and the circuit board 20 are bonded and fixed to the placement portion 124. The covering portion 125 is arranged on the placement portion 124 and bonded and fixed to the battery cell 10 and the circuit board 20. The covering portion 125 and the placement portion 124 cover the battery cell 10 and the circuit board 20. The circuit board reinforcement sheet 122 is opposite to the circuit board 20. The outer frame reinforcement sheet 123 surrounds the battery cell 10 and is bonded to the covering portion 125 and the placement portion 124 to seal the battery cell 10 and the circuit board 20.

[0154] The battery 100 provided in the embodiment of the present application completely wraps the battery cell 10 and the circuit board 20 structure therein through the placement portion 124 and the covering portion 125 of the protective film 121 after folding, and the strength of the position of the circuit board 20 in the packaging structure is strengthened by the circuit board reinforcement sheet 122 opposite to the wrapped circuit board 20, and the frame strength of the packaging structure is strengthened by the outer frame reinforcement sheet 123 located outside the wrapped battery cell 10, thereby improving the stability, aesthetics and safety of the battery pack. The protective film 121 is pressed to seal the battery cell 10 in all directions, making it waterproof, moisture-proof and dust-proof, preventing water vapor from invading the battery, and then entering the battery cell 10, reacting with the electrolyte to generate hydrofluoric acid, and then damaging the SEI film of the negative electrode sheet. In addition, the plastic frame is eliminated, the structure of the battery 100 is optimized and simplified, it is easy to disassemble, convenient for users to replace, and easier to recycle, which is beneficial to the recycling of resources and reduces plastic pollution to the environment, which is beneficial to environmental protection, reduces material waste, saves production costs, and reduces the weight of the battery, which helps to reduce transportation costs and energy consumption. In addition, due to the reduction of the plastic frame in the battery, the space utilization rate of the battery compartment can also be improved, which is beneficial to improving the battery capacity and the energy density of the battery.

[0155] 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: It includes a battery cell, a circuit board and a battery packaging structure, the battery packaging structure includes a protective film, a circuit board reinforcement sheet and an outer frame reinforcement sheet, the protective film includes a placement portion and a covering portion, the battery cell, the circuit board reinforcement sheet, the outer frame reinforcement sheet and the circuit board are adhesively fixed to the placement portion, the covering portion is arranged on the placement portion and adhesively fixes the battery cell and the circuit board, the covering portion and the placement portion cover the battery cell, the circuit board reinforcement sheet, the outer frame reinforcement sheet and the circuit board, the circuit board reinforcement sheet is opposite to the circuit board, and the outer frame reinforcement sheet surrounds the battery cell and is adhesively bonded to the covering portion and the placement portion.

2. The battery according to claim 1, characterized in that The placement portion and the covering portion are an integrally formed structure, the placement portion is an upper half of the integrally formed structure, and the covering portion is a lower half of the integrally formed structure.

3. The battery according to claim 1, characterized in that The outer frame reinforcement piece includes a fixed portion, a surrounding portion and a middle portion. The fixed portion and the surrounding portion are connected end to end to enclose a polygonal area. The middle portion is located in the polygonal area. The surrounding portion is provided with a perforation.

4. The battery according to claim 3, characterized in that The middle portion and the circuit board reinforcing sheet are respectively located on two opposite sides of the circuit board.

5. The battery according to claim 3, characterized in that The edge of the surrounding portion is flush with the edge of the placement portion.

6. The battery according to claim 3, characterized in that The width dimensions of the fixing portion and the surrounding portion are Q values, and the aperture dimension of the through hole is X value; the Q value and the X value satisfy the relationship: X<Q.

7. The battery according to claim 3, characterized in that The Q value range is 4.0mm-10.0mm.

8. The battery according to claim 3, characterized in that The placement portion and the covering portion are provided with openings, and the openings correspond to positions of the through holes.

9. The battery according to claim 8, characterized in that The opening on the covering portion is a hole that passes through the edge of the protective film. The diameter size of the opening on the covering portion is P value, the depth size is O value, and the aperture size of the perforation is X value; X value, P value and O value satisfy the relationship: P>X, O>X.

10. The battery according to claim 2, characterized in that The protective film has a uniform thickness, and the thickness dimension is a V value, which ranges from 0.05 mm to 0.1 mm.

11. The battery according to claim 1, characterized in that The thickness dimension of the outer frame reinforcement sheet is U value, and the thickness dimension of the circuit board reinforcement sheet is W value. The U value and the W value satisfy the relationship: U<W.

12. The battery according to claim 11, characterized in that The W value ranges from 0.1mm to 0.3mm.

13. The battery according to claim 11, characterized in that The U value range is 0.1mm-0.3mm.

14. The battery according to claim 1, characterized in that The width of the outer periphery of the outer frame reinforcement sheet is in the range of 4 mm to 10 mm, and the thickness of the bonding area between the outer frame reinforcement sheet and the covering portion and the placement portion is in the range of 0.2 mm to 0.5 mm.

15. The battery according to claim 1, characterized in that The thickness of the position where the battery core is arranged in the middle of the battery is greater than the thickness of the position where the outer frame reinforcement sheet is arranged around the battery.

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