Battery and electric equipment

Abstract

The battery comprises a battery cell and a protection plate, the battery cell is provided with a first end and a second end which are oppositely arranged in the first direction, the first end is provided with a pole, the protection plate is connected to the pole, a gap is formed between the protection plate and the area, outside the pole, of the first end, and the first end and the second end are opposite to each other. The gap is filled with an injection molding packaging layer, and the protection plate is provided with a diversion trench which penetrates through the protection plate along the first direction and is used for injecting a sizing material. The packaging layer is formed through injection molding, so that the protection plate and the head of the battery cell are connected into a whole to bear impact as a whole, the phenomenon that a flange for fixing the pole is cracked and opened due to stress concentration at the pole is avoided, and meanwhile, the effects of insulation, water resistance and heat insulation are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field, concretely relates to a battery and electric equipment. BACKGROUND

[0002] The pole of the battery cell is fixed on the head of the battery cell shell through the flange, and protrudes from the surface of the battery cell. When the battery is shaken or dropped, the pole is easily impacted. Generally, a protective plate is welded on the head of the battery cell to protect the pole.

[0003] In the prior art, the protective plate is usually welded on the pole, and other positions of the head of the battery cell do not contact the protective plate. In the case that the battery cell is impacted, stress concentration is easily formed at the pole, which causes the flange fixing the pole to crack and open. SUMMARY

[0004] The utility model discloses a battery and electric equipment to solve the problem that the battery pole is easily impacted and damaged in the related art.

[0005] In order to solve the above technical problems, the utility model is realized as follows:

[0006] In a first aspect, the utility model provides a battery, comprising: a battery cell and a protective plate, the battery cell has a first end and a second end arranged away along a first direction, the first end is provided with a pole, the protective plate is connected to the pole, the protective plate has a gap with an area outside the pole of the first end, the gap is filled with an encapsulation layer formed by injection molding, the protective plate is provided with a flow guide groove penetrating through the protective plate along the first direction for injecting glue.

[0007] Optionally, the protective plate comprises a circuit board and at least two output terminals, the circuit board is connected to the pole, the flow guide groove is arranged on the circuit board, the output terminals are connected to the circuit board, the encapsulation layer wraps the circuit board and part of the output terminals, and the other part of the output terminals extends out of the encapsulation layer.

[0008] Optionally, the thickness of the encapsulation layer wrapping the circuit board is H1, and H1 satisfies: 0.3mm≤H2≤0.5mm.

[0009] Optionally, the encapsulation layer comprises an encapsulation layer body and a protruding part arranged on the encapsulation layer body, the encapsulation layer body wraps the circuit board and part of the output terminals, and the protruding part is arranged between the other part of the output terminals.

[0010] The height of the protruding part in the first direction is H2, and H2 satisfies: 0.3mm≤H3≤0.5mm.

[0011] Optionally, the flow guide groove is a groove arranged along the edge of the protection plate, or a through hole penetrating through the protection plate.

[0012] Optionally, the electric core has a shell made of metal, the shell is wrapped on the surface of the electric core, the pole is connected with the shell in an insulated manner through the shell, the protection plate is provided with a first connecting sheet and a second connecting sheet, the first connecting sheet is electrically connected with the pole, the second connecting sheet is electrically connected with the shell, and the first connecting sheet and the shell are connected in an insulated manner by the insulating adhesive paper.

[0013] Optionally, the shell has a back plate protruding in the first direction at the first end, the insulating adhesive paper comprises a first bending part and a second bending part at an angle, the first bending part is pasted on the shell at the position of connecting the pole, and is used for insulating the first connecting sheet from the shell, and the second bending part covers the back plate, and is used for connecting the first connecting sheet with the back plate.

[0014] Optionally, the size of the second bending part in the first direction is L1, the size of the back plate in the first direction is L2, and L1>L2.

[0015] Optionally, the injection molding material of the encapsulation layer is hot melt adhesive, and the melting point is 170-250 DEG C.

[0016] In the second aspect, the application further discloses a battery for an electric device.

[0017] In the embodiment of the utility model, the battery comprises an electric core and a protection plate, the electric core has a first end and a second end arranged away in a first direction, the first end is provided with a pole, the protection plate is connected to the pole, the protection plate and the area outside the pole of the first end have a gap, the gap is filled with an encapsulation layer formed by injection molding, the protection plate is provided with a flow guide groove penetrating through the protection plate in the first direction, and the flow guide groove is used for injecting adhesive. The protection plate and the electric core head are connected into an integral whole by the encapsulation layer formed by injection molding, the integral whole bears the impact, the stress is avoided from concentrating on the pole to cause the flange fixed with the pole to crack and open, and the encapsulation layer plays the roles of insulation, waterproof and heat insulation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 shows a schematic diagram of a battery according to an embodiment of the utility model;

[0019] Figure 2 Fig. 2 shows an exploded view of a battery according to an embodiment of the utility model;

[0020] Figure 3 Fig. 3 shows a schematic diagram of an electric core head encapsulation according to an embodiment of the utility model;

[0021] Figure 4 Figure 1 shows an exploded view of the head of the battery cell according to an embodiment of the present application;

[0022] Figure 5 Figure 2 shows a schematic view of the head of the battery cell according to an embodiment of the present application;

[0023] Figure 6 Figure 3 shows a schematic view of the insulating adhesive paper according to an embodiment of the present application.

[0024] Reference signs:

[0025] 100: battery; 10: battery cell; 11: shell; 12: pole; 13: first connecting plate; 14: second connecting plate; 15: back plate; 20: protection plate; 21: circuit board; 211: flow guide groove; 22: output terminal; 30: encapsulation layer; 31: encapsulation layer body; 32: protruding portion; 40: adhesive auxiliary material; 41: insulating adhesive paper; 411: first bending portion; 412: second bending portion; 42: side adhesive paper; 43: tail adhesive paper; 44: easy-to-tear adhesive; 45: double-sided adhesive. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0028] As shown in Figures 1 to 5 The battery 100 includes a battery cell 10 and a protection plate 21, the battery cell 10 has a first end and a second end arranged away from each other, the first end is provided with a pole 12, the protection plate 21 is welded to the pole 12, the protection plate 21 has a gap with the area outside the pole 12 of the first end, the gap is filled with an injection encapsulation layer 30, the protection plate 21 is provided with a flow guide groove 211 penetrating through the protection plate 21 for injecting adhesive.

[0029] In the embodiment of the utility model, the head of the battery cell 10 is provided with the pole 12 protruding from the surface of the battery cell 10, which is used to lead out the positive and negative poles of the battery cell 10. The pole 12 is led out from the bare core and fixed on the surface of the shell 11 wrapping the bare core through the flange. The surface of the pole 12 is covered with an insulating cover. The protection plate 21 is welded with the pole 12. Specifically, the protection plate 21 can be composed of a printed circuit board (PCB) and a flexible circuit board (FPC). The protection plate 21 is provided with a solder pad, which is welded with the pole 12 through the positive and negative connecting pieces. Since the pole 12 and the connecting pieces have a certain thickness, there is a gap between the protection plate 21 and the surface of the head of the battery cell 10, and only a part of the pole 12 is spot-welded. When the battery 100 is impacted due to the falling of external equipment, since the head of the bare core has the protruding pole 12, there is a certain gap between the head of the bare core and the shell 11 wrapping the bare core. During the impact, displacement is easily generated. Once the bare core moves, it may collide with the insulating cover of the pole 12, and the stress is concentrated in a small range around the pole 12, thereby causing the shell 11 fixing the pole 12 to deform under stress and pull the flange used to fix the pole 12, resulting in the cracking and opening of the flange welding point in this area. In order to improve the impact resistance of the head of the battery cell 10, the embodiment adopts an injection molding process in the head of the battery cell 10, fills the gap between the protection plate 21 and the battery cell 10 with glue to form an encapsulation layer 30, and wraps the protection plate 21 and the pole 12 in the encapsulation layer 30, so that the head of the battery cell 10 as a whole withstands external impact, and the impact force generated by the impact is diffused from the local area of the pole 12 to the whole head of the battery cell 10. Avoiding the stress concentration phenomenon in the flange used for fixing around the pole 12 when the pole 12 only withstands the impact, resulting in the cracking and opening of the flange, affecting the normal work of the battery 100.

[0030] In a specific application, the protection plate 21 is welded on the battery cell 10 first, and then the battery cell 10 is placed in a mold to perform injection molding on the head of the battery cell 10. Generally, the glue is injected from the side of the protection plate 21 to the direction of the battery cell 10, and the protection plate 21 is completely plastic encapsulated with the vertical surface of the battery cell 10. In order to avoid contact short circuit, the positive and negative poles of the battery cell 10 are usually spaced apart by a certain distance and arranged on the two sides of the first end of the battery cell 10, and the protection plate 21 is welded and connected with the positive and negative poles respectively. Therefore, the protection plate 21 generally has a certain length and extends from one side of the first end of the battery cell 10 to the other side. When injection molding is performed, it is difficult for the glue to flow down from the gap between the protection plate 21 and the mold, which can easily lead to incomplete filling between the protection plate 21 and the battery cell 10, affecting the connection strength. Therefore, the flow guide groove 211 is added in the middle of the protection plate 21, the flow guide groove 211 penetrates the protection plate 21 along the first direction, that is, the thickness direction of the protection plate 21, so that the injected glue flows into the gap between the protection plate 21 and the battery cell 10 along the flow guide groove 211, completely fills the gap, and ensures that there is no glue shortage problem in the area between the protection plate 21 and the vertical surface of the battery cell 10. It can be understood that the flow guide groove 211 is arranged as much as possible in the middle of the protection plate 21, avoiding the position where the protection plate 21 is connected with the pole 12, preventing affecting the connection between the protection plate 21 and the pole 12, and at the same time, the injected glue can be uniformly filled in the gap between the protection plate 21 and the battery cell 10.

[0031] Further, the protection plate 21 and the battery cell 10 have various connection modes. The surface of the protection plate 21 welded and connected with the pole 12 is defined as a first surface, the first surface can be arranged parallel to the first end surface of the battery cell 10, so that the first surface is tightly attached to the first end, the connecting piece is folded and arranged between the first surface and the first end, and the encapsulation layer 30 formed by injection molding fills the gap between the first surface and the battery cell 10, so that the protection plate 21 and the head of the battery cell 10 are connected as a whole. The first surface can also be arranged perpendicular to the first end surface of the battery cell 10, and correspondingly, the two ends of the connecting piece are perpendicular to each other, one end is connected with the pole 12, and the other end is connected with the welding pad on the first surface. The protection plate 21 and the battery cell 10 can be connected by arranging the welding pad on the protection plate 21 and welding with the connecting piece, or can be connected by the adhesion mode, wherein when the connecting piece and the protection plate 21 are connected by the adhesion mode, the glue used for adhesion can have conductivity. The shape of the protection plate 21 can be a cuboid, can be an L-shaped type with a bending part, or can have other shapes, and extends to different positions of the battery cell 10 according to the need of installation in the corresponding electrical equipment. The structure of the protection plate 21 and the specific connection mode are not limited in the embodiments of the present application.

[0032] The flow guide groove 211 can have various different structures and forms, such as Figure 4As shown, the second surface opposite to the first surface of the protection plate 21 is defined, the distance between the first surface and the second surface is the thickness of the protection plate 21, the direction in which the first surface extends from the negative electrode to the positive electrode is the length of the protection plate 21, and the distance between the other two sides of the first surface is the width of the protection plate 21. The width of the protection plate 21 at the middle position is slightly smaller than the width of the two sides, that is, a groove is arranged at the edge of the protection plate 21 in the length direction, as a flow guide groove 211 when injection molding, so that the injected material can flow down from the groove. The flow guide groove 211 can also be arranged at the center of the protection plate 21, and a groove penetrating the plate body from the second surface to the first surface is arranged in the middle of the protection plate 21. The present embodiment is only illustrative, and when the protection plate 21 has different shapes, the flow guide groove 211 also has different positions and shapes accordingly, and can all play the role of providing a channel on the protection plate 21 for material injection and preventing the encapsulation layer 30 from leaking.

[0033] The battery 100 in the present embodiment integrally injection molds the protection plate 21 with the head of the battery cell 10, completely fills the gap between the protection plate 21 and the battery cell 10, and when the internal bare core hits the insulating cover of the pole 12 of the battery 100, the material injection molded at the head limits the deformation at this position, and the impact force is dispersed to the entire head of the battery cell 10, so that the impact force of the bare core is generally less than the strength of the welding point of the flange of the entire head, thereby avoiding the situation that the top sealing flange of the battery cell 10 is cracked due to the impact of the bare core when the battery cell 10 falls. At the same time, the head injection also improves the waterproof performance of the battery 100. At present, the packaging of the steel shell battery 100 is mostly adhesive bonding, which cannot prevent water, but in the present embodiment, the head of the battery 100 containing the protection plate 21 and the pole 12 is completely plastic sealed, which can achieve IPX5 waterproof, thereby improving the product competitiveness.

[0034] In addition, in some optional embodiments, the protection plate 21 includes a circuit board 21 and at least two output terminals 22, the circuit board 21 is connected to the pole 12, the flow guide groove 211 is arranged on the circuit board 21, the output terminals 22 are connected to the circuit board 21, the encapsulation layer 30 wraps the circuit board 21 and part of the output terminals 22, and the other part of the output terminals 22 extends out of the encapsulation layer 30.

[0035] In this embodiment, the protection board 21 can be divided into two parts: a circuit board 21 and an output terminal 22. The circuit board 21 has pads on its surface for connecting to the positive and negative terminals of the battery cell 10. The output terminal 22 is used for connecting to the interface of external electrical equipment. The output terminal 22 is generally made of a flexible printed circuit board (FPC). Two flexible printed circuit boards are connected to both ends of the circuit board 21, with the other end extending out for connection to external electrical equipment. During encapsulation, the circuit board 21 is first connected to the positive and negative terminals of the battery cell 10. One end of the flexible printed circuit board is fixed to the circuit board 21. Then, the unfixed end of the flexible printed circuit board is pulled out and placed into a mold for injection molding. The circuit board 21, the flexible printed circuit board, and the end connected to the circuit board 21 are completely encapsulated in the adhesive, forming an encapsulation layer 30 at the head of the battery cell 10. Then, the unfixed end of the flexible printed circuit board is bent on the surface of the encapsulation layer 30, so that the connecting piece on the flexible printed circuit board is located at the designated position for connection to the interface of the electrical equipment. The shape, bending method, and fastening method of the output terminal 22 can be adjusted according to actual needs.

[0036] Understandably, the connection sequence along the first direction is: battery cell 10, circuit board 21, and output terminal 22. Circuit board 21 is generally a single printed circuit board connected to the positive and negative terminals of battery cell 10. Output terminal 22 is connected to the side of circuit board 21 away from battery cell 10. During adhesive injection, the adhesive sequentially wraps the head of battery cell 10, circuit board 21, and the end of output terminal 22 connected to circuit board 21. Therefore, the guide groove 211 of the protective plate 21 is correspondingly set on circuit board 21. The injected adhesive flows from the guide groove 211 into the gap between circuit board 21 and battery cell 10, completely filling the gap. When applying adhesive to the part where output terminal 22 is connected to circuit board 21, the protruding end of output terminal 22 needs to be fixed in place, and space needs to be reserved for subsequent bending of the flexible circuit board.

[0037] In some alternative embodiments, the thickness of the encapsulation layer 30 covering the circuit board 21 is H1, where H1 satisfies: 0.3mm ≤ H2 ≤ 0.5mm.

[0038] like Figure 3 As shown, one end of the flexible circuit board is connected to the surface of the circuit board 21. This part needs to be wrapped in the encapsulation layer 30 to ensure the integrity of the connection of the components at the head of the battery cell 10. The flexible circuit boards used in production have thicknesses of 0.17mm, 0.21mm, and 0.27mm. To ensure the strength of the encapsulation layer 30 in fixing the protective board 21, the adhesive thickness needs to exceed the device height by at least 0.1mm. Therefore, the height of the encapsulation layer 30 protruding from the circuit board 21 is designed to be 0.3mm to 0.5mm, so that the encapsulation layer 30 has sufficient connection strength to prevent the adhesive from coming off and losing its protective function for the head of the battery cell 10.

[0039] In addition, in some optional embodiments, the encapsulation layer 30 includes an encapsulation layer body 31 and a protrusion 40 disposed on the encapsulation layer body 31. The encapsulation layer body 31 wraps around the circuit board 21 and part of the output terminals 22. The protrusion 40 is disposed between another part of the output terminals 22. The height of the protrusion 40 in the first direction is H2, and H2 satisfies: 0.3mm≤H3≤0.5mm.

[0040] like Figure 3 As shown, the two ends of the encapsulation layer 30 are used to set flexible circuit boards that are bent. The encapsulation layer 30 between the flexible circuit boards has a protrusion 40. Compared with the part of the encapsulation layer 30 that connects to the flexible circuit board, the protrusion 40 is 0.3mm to 0.5mm higher. This protrusion 40 is used to press against the back wall of the housing to assist in positioning when the battery 100 is installed. When installing and using the battery, first put the battery 100 into the housing as a whole, align the head of the battery 100 with the back wall of the housing, press the protrusion 40 of the encapsulation layer 30 against the back wall, and then fasten the flexible circuit boards at both ends to the connectors inside the housing. This prevents the flexible circuit boards from being stuck against the back wall when the battery 100 is installed near the head, which would make it difficult to fasten the flexible circuit boards to the connectors and affect the assembly.

[0041] In some alternative embodiments, the guide groove 211 is a groove provided along the edge of the protective plate 21, or a through hole penetrating the protective plate 21.

[0042] like Figure 4 As shown, the width of the protective plate 21 in the middle is slightly smaller than the width on both sides. A groove is provided along the length of the edge of the protective plate 21, serving as a flow guide 211 during injection molding, allowing the injected adhesive to flow down from the groove. The flow guide 211 can also be located in the center of the protective plate 21, with a groove extending from the second surface to the first surface through the plate. The flow guide 211 can be a long, narrow opening, or a circular, square, or triangular through-hole. There can be one or multiple flow guides 211.

[0043] In some alternative embodiments, the battery cell 10 has a metal housing 11 that wraps around the surface of the battery cell 10. The terminal post 12 passes through the housing 11 and is insulated from the housing 11. The protection plate 21 is provided with a first connecting piece 13 and a second connecting piece 14. The first connecting piece 13 is electrically connected to the terminal post 12, and the second connecting piece 14 is electrically connected to the housing 11. An insulating adhesive tape 41 is provided between the first connecting piece 13 and the housing 11.

[0044] In the steel shell battery 100, the metal shell 11 can be used as the positive or negative electrode, and the other electrode is led out through the pole 12 and is insulatedly connected with the shell 11. In the embodiment, the shell 11 is taken as the negative electrode as an example, and the positive electrode is led out through the pole 12 and is arranged at the first end of the battery cell 10 and is welded on the shell 11 through a flange and is insulated between the shell 11. The protection plate 21 is connected with the positive pole 12 through the first connecting sheet 13 and is connected with the negative pole shell 11 through the second connecting sheet 14. The position of the shell 11 connected with the second connecting sheet 14 is reinforced to increase the thickness of the shell 11 at the welding position and prevent the shell 11 from being broken when welding the second connecting sheet 14 and the shell 11.

[0045] The shell 11 can be made of steel, stainless steel, nickel-plated steel and other metals, has high hardness and stability, the surface is plated with an oxidation-resistant layer and is insulated to prevent short circuit caused by leakage. The connecting sheet is usually made of nickel, which has good conductivity and is not easy to be oxidized, and other metals or alloys such as copper can also be used as the material of the connecting sheet. The specific material of the shell 11 and the connecting sheet is not limited in the embodiment.

[0046] Since the metal shell 11 itself is negative, it is easy to cause short circuit when connected with the battery 100 circuit, so measures need to be taken to insulate the protection plate 21 and the metal shell 11 at the position where the protection plate 21 is connected with the positive pole 12, mainly to insulate the first connecting sheet 13 connected with the positive pole 12 from the shell 11. As shown in Figure 4 , the position where the positive pole 12 is connected with the metal shell 11 is surrounded by the insulating adhesive paper 41, and when the first connecting sheet 13 is welded on the pole 12, the insulating adhesive paper 41 insulates the first connecting sheet 13 from the metal shell 11 to prevent accidental contact. Specifically, the insulating adhesive paper 41 is composed of an insulating blue film, a pet layer and a back adhesive.

[0047] In addition, in some optional embodiments, the shell 11 has a back plate 15 protruding in the first direction at the first end, the insulating adhesive paper 41 includes a first bending part 411 and a second bending part 412 at a certain angle, the first bending part 411 is pasted on the shell 11 at the position of the pole 12 to insulate the first connecting sheet 13 from the shell 11, and the second bending part 412 covers the back plate 15 to connect the first connecting sheet 13 with the back plate 15.

[0048] As shown in Figure 5 , the metal shell 11 is welded with the back plate 15 at the back, and the back plate 15 protrudes 0.4-0.6 mm from the head surface of the battery cell 10 due to the need for welding. Since the metal shell 11 is negative, the back plate 15 is also negative, so when the protection plate 21 is connected with the pole 12, even if the insulating adhesive paper 41 is pasted around the pole 12, there is still a problem that the first connecting sheet 13 contacts with the back plate 15 to cause short circuit.

[0049] In the embodiment, the insulating adhesive paper 41 is divided into a first bending part 411 and a second bending part 412, and is an integral molding structure. The first bending part 411 is provided with a back adhesive layer for being attached to the shell 11. The second bending part 412 can be provided with a back adhesive layer or without a back adhesive layer. There is a cutting line for assisting bending at the position where the first bending part 411 and the second bending part 412 contact each other. When the insulating adhesive paper 41 is attached, the back adhesive layer of the first bending part 411 is attached to the surface of the metal shell 11 first, and then the first bending part 411 is bent along the cutting line, so that the second bending part 412 is substantially perpendicular to the first bending part 411 and is automatically attached to the back plate 15. When the insulating adhesive paper 41 is attached, the insulating adhesive paper 41 is bent along the cutting line, the first bending part 411 covers the positive pole 12, and the second bending part 412 covers the protruding position of the back plate 15. The connection piece of the protection plate 21 is prevented from being in contact with the positive pole 12 and the shell 11 with negative polarity during welding, so that short circuit is avoided. Then, the protection plate 21 is welded, and then the battery cell 10 is placed in a mold for head injection molding.

[0050] Further, the first bending part 411 can be designed as a C shape, and only covers the shell 11 around the pole 12 without being in contact with the pole 12. The first bending part 411 can also be provided with a hole in the middle part, so that the pole 12 is exposed from the hole of the insulating adhesive paper 41, and the pole 12 is convenient to be connected to the protection plate 21 through the connection piece.

[0051] In addition, in some optional embodiments, the injection molding material of the packaging layer 30 adopts hot melt adhesive with a melting point of 170-250 DEG C.

[0052] The preliminarily assembled battery cell 10 is placed in a mold, and the molten adhesive is injected into the product mold by pressure. The melting point of the adhesive is 170-250 DEG C. After the packaging layer 30 is cooled and hardened, the battery cell 10 is taken out for next assembly. The injection molding process and the adhesive used can be selected according to actual conditions, which are not limited herein.

[0053] In order to facilitate understanding of the content of the head packaging method of the battery 100 provided by the utility model, as shown in Figure 2 , the following describes the process flow of the PACK assembly of the steel shell battery 100.

[0054] S1: The positive insulating adhesive paper 41 is attached to the positive pole 12 of the steel shell battery cell 10 to prevent the positive connection piece of the protection plate 21 from being in contact with the pole 12 and the shell 11 of the battery cell 10 during welding of the protection plate 21, so that short circuit is avoided.

[0055] S2: The protection plate 21 is welded to the shell 11 of the steel shell battery cell 10. The positive pole 12 is welded to the first connection piece 13, and the second connection piece 14 is welded to the negative reinforcing position of the steel shell 11. The negative reinforcing mainly prevents the shell 11 from being welded through during spot welding.

[0056] S3: fold the nickel sheet on the protection plate 21, make the protection plate 21 parallel to the head vertical surface of the battery cell 10, then put the battery 100 into the injection mold, and plastic seal the head position;

[0057] S4: attach the side adhesive paper 42 to the two sides of the battery 100, and attach the tail adhesive paper 43 to the tail position, which plays an insulation protection role;

[0058] S5: position the easy-to-tear sticker 44 to the installation surface, smear the two sides of the handle, and finally attach the double-sided adhesive tape 45 to the easy-to-tear sticker 44, which completes the packaging of the battery 100.

[0059] The battery 100 in this embodiment is mainly composed of a battery cell 10, a head injection molding material, a protection plate 21, an insulating adhesive paper 41, a double-sided adhesive tape 45, two side adhesive papers 42, a tail adhesive paper 43, and a double-sided adhesive tape 45. The insulating adhesive paper 41 is attached to the two sides of the positive pole 12 of the vertical surface of the head of the battery cell 10, avoiding the first connecting sheet 13 from contacting the positive pole 12 of the battery cell 10 and the metal shell 11 at the same time, and the protection plate 21 is welded on the battery cell 10, of which the positive pole is welded on the positive pole 12 of the steel shell and the negative pole is welded on the shell 11 of the steel shell. The two side adhesive papers 42 are respectively attached to the two sides of the battery cell 10, which provides insulation and prevents the easy-to-tear sticker 44 from being cut by the flange edge of the back plate 15. The head position is injection molded by a hot melt adhesive through an injection molding machine, which plastic seals the protection plate 21 and the battery cell 10 together, plays an insulation, waterproof, and heat insulation role, and solves the problem that the positive pole 12 area is small due to the closest distance between the internal and the bare core, and the force receiving area of the bare core collision is only a small range of the positive pole 12, and the welding strength of this area cannot withstand the impact of the bare core, resulting in the problem of the positive pole 12 area welding flange edge opening. The tail area is attached and wrapped around the tail of the battery cell 10 by bonding, which plays an insulation protection role. The easy-to-tear sticker 44 is attached, which wraps the back adhesive surface and the two side sealing edges, plays an insulation protection and easy-to-disassemble role, and finally the double-sided adhesive tape 45 is attached to the easy-to-tear sticker 44, which is used for the adhesion and fixation of the battery 100 in the cabin.

[0060] The battery 100 is mainly installed by back adhesive and the whole machine battery compartment, the mode and category of back adhesive are unlimited, can be defined by oneself according to use and demand, such as the form of easy-to-tear sticker 44+double-sided adhesive 45 in the above-mentioned battery 100 scheme can also be used, easy-to-tear sticker 44 can also be cancelled, and double-sided adhesive 45 is directly bonded, or a variety of back adhesive schemes such as easy-to-pull adhesive and electrolytic adhesive are bonded, and the disassembly mode corresponds to the adhesive scheme of the battery 100, the easy-to-tear sticker 44+double-sided adhesive 45 form is used, the easy-to-pull adhesive handle is pulled through the force of 90° angle with the battery 100 to disassemble, the direct back adhesive can be disassembled by freezing, and the whole machine can be disassembled by knocking under the condition of-25 DEG C freezing for one hour, the easy-to-pull adhesive scheme can be disassembled by pulling the easy-to-pull adhesive, and the electrolytic adhesive can be disassembled by increasing the positive and negative voltage of the two adhesive surfaces of the battery 100, and the disassembly can be completed within 15S under the voltage of 30V;Of course, most of the back adhesive schemes can be disassembled by freezing.

[0061] The application discloses a battery, comprising a battery cell and a protection plate, the battery cell has a first end and a second end arranged away along a first direction, the first end is provided with a pole, and the protection plate is connected to the pole; the protection plate and the area outside the pole of the first end have a gap, the gap is filled with an injection molding encapsulation layer, and the protection plate is provided with a flow guide groove penetrating through the protection plate along the first direction for injecting adhesive. The encapsulation layer formed by injection molding connects the protection plate and the head of the battery cell into a whole, which bears the impact as a whole, avoids stress concentration at the pole, prevents the flange fixing the pole from cracking and opening, and plays the roles of insulation, waterproof and heat insulation.

[0062] In another aspect, the utility model discloses a kind of electric equipment, comprising the battery in any one of the above embodiments.

[0063] In the utility model embodiment, the electric device can be a mobile phone. The steel shell battery has the advantages of high safety and good heat dissipation as a mobile phone battery. In traditional batteries, overcharging, short circuit and other phenomena may cause the battery to swell or even catch fire, but the wrapping of the steel shell can effectively prevent these accidents from happening, providing an additional layer of protection for daily use by users. Moreover, the steel shell has higher heat resistance and can better protect the internal structure of the battery in a high-temperature environment. In daily use, the mobile phone is easily dropped when carried on the body or placed on the desktop, so it is necessary to pay attention to the anti-collision performance of each component of the mobile phone. The shell of the steel shell battery is connected in the engine room by snap-fit connection, and the shell itself has excellent impact resistance, but the bare core inside the shell is prone to collision at the pole flange. Therefore, injection molding is performed at the head of the battery cell, the stress point is expanded from the pole to the entire head of the battery cell, which reduces the risk of damage to the battery caused by the drop of the mobile phone, and enhances the waterproof performance of the mobile phone. Of course, the electric device can also be other components, such as a smart watch, etc. The specific type of electric device is not limited in the utility model embodiment.

[0064] It should be noted that each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0065] Although the optional embodiments of the utility model have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to include the optional embodiments and all changes and modifications falling within the scope of the utility model embodiments.

[0066] Finally, it should also be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between the entities. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such article or terminal device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of other identical elements in the article or terminal device including the element.

[0067] The above describes the technical solutions provided by the utility model in detail, and the principles and implementation modes of the utility model are described by applying specific examples in this paper. For those skilled in the art, according to the principles and implementation modes of the utility model, the specific implementation modes and application scope will be changed, and the content of the specification should not be understood as a limitation of the utility model.

Claims

1. A battery (100) characterized in that, The application relates to a battery cell (10) and a protection plate (20), the battery cell (10) having a first end and a second end arranged away from each other along a first direction, the first end being provided with a pole (12), the protection plate (20) being connected to the pole (12), the protection plate (20) having a gap with the area outside the pole (12) of the first end, the gap being filled with an injection-molded encapsulation layer (30), the protection plate (20) being provided with a flow guide groove (211) penetrating the protection plate (20) along the first direction, which is used for injecting glue. The protection plate (20) comprises a circuit board (21) and at least two output terminals (22), the circuit board (21) being connected to the pole (12), the flow guide groove (211) being arranged on the circuit board (21), the output terminals (22) being connected to the circuit board (21), and the encapsulation layer (30) wrapping the circuit board (21) and part of the output terminals (22), the other part of the output terminals (22) extending out of the encapsulation layer (30).

2. The battery (100) of claim 1, wherein, The thickness of the encapsulation layer (30) wrapping the circuit board (21) is H1, and H1 satisfies 0.3mm<=H2<=0.5mm.

3. The battery (100) of claim 2, wherein, The encapsulation layer (30) comprises an encapsulation layer body (31) and a protruding part (32) arranged on the encapsulation layer body (31), the encapsulation layer body (31) wrapping the circuit board (21) and part of the output terminals (22), and the protruding part (32) being arranged between the other part of the output terminals (22), 4. The battery (100) of claim 2, wherein, The height of the protruding part (32) along the first direction is H2, and H2 satisfies 0.3mm<=H3<=0.5mm. The flow guide groove (211) is a groove arranged along the edge of the protection plate (20) or a through hole penetrating the protection plate (20).

5. The battery (100) of claim 1, wherein, The battery cell (10) has a metal shell (11) wrapping the surface of the battery cell (10), the pole (12) penetrating the shell (11) and being insulatedly connected to the shell (11), the protection plate (20) being provided with a first connecting sheet (13) and a second connecting sheet (14), the first connecting sheet (13) being electrically connected to the pole (12), the second connecting sheet (14) being electrically connected to the shell (11), and an insulating adhesive paper (41) being arranged between the first connecting sheet (13) and the shell (11).

6. The battery (100) of claim 1, wherein, The shell (11) has a back plate (15) protruding along the first direction at the first end, the insulating adhesive paper (41) comprising a first bending part (411) and a second bending part (412) at an angle, the first bending part (411) being pasted on the shell (11) at the position connecting the pole (12) and being used for insulating the first connecting sheet (13) from the shell (11), and the second bending part (412) covering the back plate (15) and being used for connecting the first connecting sheet (13) to the back plate (15).

7. The battery (100) of claim 6, wherein, ​ 8. The battery (100) of claim 7, wherein, The second bending part (412) has a size L1 in the first direction, and the back plate (15) has a size L2 in the first direction, L1>L2.

9. The battery (100) of claim 1, wherein, The encapsulation layer (30) is made of hot melt adhesive with a melting point of 170-250 DEG C.

10. An electric device, characterized by A battery (100) as claimed in any of claims 1-9.

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