Battery

Abstract

The utility model provides a battery. The battery comprises a battery cell body, a metal shell and a plastic head shell, the top of the metal shell is of an opening structure, the battery cell body is mounted in the metal shell, and an insulating material is arranged between the battery cell body and the metal shell, so that the battery cell body is insulated from the metal shell; and the plastic head shell is connected to the opening of the metal shell so as to cover the opening. According to the battery, the metal shell is adopted, due to the characteristics of metal, namely, the wall thickness size of the metal shell is reduced, more space can be reserved for the battery cell body in the metal shell, the size of the battery cell body can be increased, the capacity of the battery is improved, the surface strength of the battery is enhanced, and the requirements of customers can be better met.

Description

Technical Field

[0001] This application relates to the field of battery technology, and particularly to a battery. Background Art

[0002] With the rapid development of high-tech technologies, people's demand for electronic products is increasing. At the same time, the requirements for the performance of electronic products are also constantly improving, especially for the batteries in electronic products.

[0003] As is well known, the battery is one of the particularly important components for electronic products because the battery performance can directly affect the length of use time of the electronic product. Moreover, it can be said that the capacity of the battery is one of the key factors in measuring battery performance. Currently, most electronic products pursue miniaturization, which requires that within a certain space, the capacity of the battery in the electronic product should be as large as possible.

[0004] Therefore, how to improve the battery capacity within a limited space has become a technical problem that needs to be solved urgently at present. Utility Model Content

[0005] This application provides a battery to solve the technical problem of how to improve the battery capacity within a limited space.

[0006] This application provides a battery, which includes: a battery cell body, a metal shell, and a plastic head shell;

[0007] The top of the metal shell is an open structure. The battery cell body is installed inside the metal shell, and an insulating material is provided between the battery cell body and the metal shell to insulate the battery cell body from the metal shell;

[0008] The plastic head shell is connected to the opening of the metal shell to cover the opening.

[0009] Optionally, the insulating material is insulating paper, and the insulating paper is in a U-shaped structure and is pasted on the left and right side edges and the bottom of the battery cell body.

[0010] Optionally, the insulating material is insulating glue, and the insulating glue is applied on the left and right side edges and the bottom of the battery cell body;

[0011] Or, the insulating glue is applied on the left and right sides and the bottom of the inside of the metal shell opposite to the side edges of the battery cell body.

[0012] Optionally, a gap is provided between the front and rear planes of the metal casing and the cell body, and a spacer is provided at the gap. The spacer is adhered to the front and rear planes of the cell body for isolating and positioning the cell body from the metal casing. Wherein, the spacer is made of a compressible material.

[0013] Optionally, the spacer is in a ring structure, and the ring structure is adhered to the front and rear planes of the cell body;

[0014] Alternatively, the spacer is in a strip shape, and the strip is adhered to the upper and lower positions or the left and right positions opposite to each other on the front and rear planes of the cell body.

[0015] Optionally, it further includes a circuit protection board, and the circuit protection board is used to control the conduction and cut-off of the battery charge and discharge circuit;

[0016] The first side of the circuit protection board is welded to the cell body, and a connector is provided at the front end of the second side of the circuit protection board, and the connector passes through the plastic head shell.

[0017] Optionally, the lower part of the plastic head shell has a concave structure, and the circuit protection board is installed in the concave structure.

[0018] Optionally, clamping positions are provided on the front and rear sides of the plastic head shell for mating connection with the clamping holes provided at the relative positions of the metal casing, so as to cover the opening of the metal casing with the plastic head shell.

[0019] Optionally, it further includes an injection molding structure, and the injection molding structure is used to fill the gap between the cell body and the plastic head shell by injection molding.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] The present application provides a battery, and the battery includes: a cell body, a metal casing, and a plastic head shell; the top of the metal casing is an open structure, the cell body is installed inside the metal casing, and an insulating material is provided between the cell body and the metal casing to insulate the cell body from the metal casing; the plastic head shell is connected to the opening of the metal casing to cover the opening. The present application adopts a metal casing. Due to the characteristics of the metal itself, that is, the wall thickness dimension of the metal casing is reduced, more space can be provided for the cell body inside it, the size of the cell body can be increased to improve the battery capacity, and at the same time, the surface strength of the battery is enhanced to meet the needs of customers. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of a battery explosion provided by an embodiment of the present application.

[0023] Figure 2 It is a schematic structural diagram of a completed battery assembly provided by an embodiment of the present application.

[0024] Reference numerals:

[0025] 10: Battery cell body; 101: Side sealing edge; 102: Plane; 103: Tab.

[0026] 20: Metal shell; 201: Opening; 202: Card hole.

[0027] 30: Plastic head shell; 301: Concave structure; 302: Card position; 303: Channel; 304: U-shaped baffle.

[0028] 40: Insulating material;

[0029] 50: Spacer;

[0030] 60: Circuit protection board; 601: First side; 602: Second side; 6021: Connector.

[0031] 70: Injection molding structure. Detailed implementation manners

[0032] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below.

[0033] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the related art, the battery housing generally uses an overall four-sided rubber shell, and steel sheets need to be added to the front and back sides of the battery cell body. Among them, the overall four-sided rubber shell is injection-molded, and its minimum wall thickness requirement is 0.7 mm. Moreover, in most cases, the wall thickness of the battery rubber shell is greater than 0.7 mm, which reduces the space for the battery cell body inside the battery rubber shell, thereby reducing the battery capacity and not meeting the customer's demand for battery capacity.

[0036] In view of this, the present application provides a battery, which includes: a battery cell body, a metal housing, and a plastic head shell; the top of the metal housing is an open structure, the battery cell body is installed inside the metal housing, and an insulating material is provided between the battery cell body and the metal housing to insulate the battery cell body from the metal housing; the plastic head shell is connected to the opening of the metal housing to cover the opening.

[0037] It can be understood that the present application uses a metal housing. Due to the characteristics of the metal itself, that is, the wall thickness dimension of the metal housing is reduced, a larger space is reserved for the battery cell body, the size of the battery cell body can be increased to improve the battery capacity, and the metal housing can better protect the battery cell body.

[0038] Next, the battery structure in the embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0039] Specifically, the battery has a wide range of applications and there are many types of it. Here, the types of batteries will not be listed one by one. In the embodiments of the present application, a secondary battery can be taken as an example for illustration, that is, the secondary battery is a rechargeable battery. Of course, the battery in the embodiments of the present application can be a lithium-ion battery, but it does not exclude that it can also be other types of batteries, such as nickel-cadmium batteries, etc. In the embodiments of the present application, a lithium-ion battery is taken as an example for illustration.

[0040] As Figure 1 shown, the battery includes a battery cell body 10, a metal housing 20, and a plastic head shell 30.

[0041] The battery cell body 10 is the basic unit of the battery and is responsible for storing and releasing electrical energy. Its main components include:

[0042] 1. Cathode material: Usually composed of an active substance, a conductive agent, and a binder, and coated on a current collector (such as aluminum foil). The cathode material determines the voltage, energy density, and charge and discharge efficiency of the battery. Common ones include lithium cobalt oxide (LiCoO2), lithium nickel cobalt manganese oxide (NCM), lithium iron phosphate (LFP), etc.

[0043] 2. Anode material: It is also composed of active material, conductive agent and binder, and is coated on a current collector (such as copper foil). The anode is mainly responsible for accepting and releasing lithium ions. Common materials include graphite, silicon-based materials, etc.

[0044] 3. Electrolyte: An ion-conducting liquid that enables lithium ions to migrate freely between the anode and cathode. The electrolyte is usually composed of a lithium salt (such as lithium hexafluorophosphate) dissolved in an organic solvent and is crucial for the performance and safety of the battery.

[0045] 4. Separator: Located between the anode and cathode, it is a porous film that allows lithium ions to pass through while preventing direct contact between the two electrodes from causing a short circuit. The separator material is often polyethylene (PE) or polypropylene (PP), and sometimes special treatments are carried out to enhance safety performance.

[0046] In addition to the above core components, the battery cell body 10 has other components, which will not be elaborated here.

[0047] In the embodiments of the present application, the battery cell body 10 can be a single battery cell or composed of multiple battery cells. Whether the battery cell body is a single battery cell or multiple battery cells can be determined according to working requirements.

[0048] As Figure 1 shown, in addition to the above battery cell body 10, the battery further includes a metal shell 20. The top of the metal shell 20 is an open structure, and the plastic head shell 30 is connected to the opening 201 of the metal shell 20 to cover the opening 201. In the embodiments of the present application, the metal shell 20 is a rectangular parallelepiped structure with an opening 201, but it is not excluded that the metal shell 20 can be other open structures, such as an open cylindrical structure, etc. The metal shell 20 can be set according to specific working conditions.

[0049] In the embodiments of the present application, the metal shell 20 is used. On the one hand, the wall thickness of the metal shell 20 can be 0.2 mm or less than 0.2 mm, so that more space can be provided for the battery cell body 10, the size of the battery cell body 10 can be increased, and the battery capacity can be improved to meet customer requirements. On the other hand, the metal shell 20 can better protect the battery cell body 10 inside. Because the metal shell 20 has a certain hardness, when the battery accidentally drops, the metal shell 20 can avoid the safety risks brought by damage to the battery surface.

[0050] Moreover, in the embodiments of the present application, the inner and outer surfaces of the metal housing 20 can be color-treated, and the inner and outer surfaces of the metal housing 20 can be color-treated according to customer needs or the requirements of electronic products. Engraving, silk-screening, making labels, etc. can also be performed on the inner and outer surfaces of the metal housing 20. It can be understood that the inner and outer surfaces of the metal housing 20 can be adaptively processed according to specific needs or requirements. In addition, the bottom surface of the metal housing 20 can also be made into a simple shape, or the bottom surface of the metal housing 20 can be set as a curved surface, etc.

[0051] Specifically, the material of the metal housing 20 can be aluminum alloy, or zinc, or other metal materials. Which metal the metal housing 20 specifically uses depends on the type of battery, the use environment, design requirements, etc. Here, no further description will be given.

[0052] Among them, the battery cell body 10 is installed inside the metal housing 20, and the battery cell body 10 can be installed inside the metal housing 20 through the opening 201 of the metal housing, that is, the metal housing 20 is used to encapsulate the outside of the battery cell body 10 to protect the battery cell body 10 and other structures inside the metal housing 20 and provide mechanical support.

[0053] It should be noted that an insulating material 40 is provided between the battery cell body 10 and the metal housing 20 to insulate the battery cell body 10 from the metal housing 20.

[0054] The battery cell body 10 stores and releases electrical energy. If the side seal 101 of the battery cell body 10 or the sharp corner positions generated by the side seal come into direct contact with the metal housing 20, it will cause the metal housing 20 to be charged, which will pose a safety hazard. Therefore, an insulating material 40 needs to be provided between the side seal 101 of the battery cell body 10, its bottom, and the metal housing 20. Through the insulating material 40, the side seal 101 of the battery cell body 10 and its bottom can be insulated from the metal housing 20 to make the metal housing 20 safer.

[0055] Among them, the insulating material 40 is insulating paper, and the insulating paper is in a U-shaped structure and is pasted on the left and right side seals 101 and the bottom of the battery cell body.

[0056] Specifically, the insulating paper can be pasted on the battery cell body 10 to insulate the sharp corners generated by the cut surfaces of the side seals and the bottom side seals of the battery cell body 10 from the metal housing 20. In the embodiment of the present application, the insulating paper can be in a U-shaped structure, that is, the U-shaped insulating paper is pasted on the left and right side seals 101 and the bottom of the battery cell body 10 to prevent the electric energy at the sharp corners generated by the cut surfaces of the upper side seal and the bottom side seal of the battery cell body 10 from being introduced into the metal housing 20, so as to avoid the metal housing 20 from being charged.

[0057] The material of the insulating paper mainly includes plant fibers (such as cotton fibers), mineral fibers, synthetic fibers, or mixtures of these materials, etc. Among them, common raw materials include cotton paper, wood pulp paper, reed paper, etc. These basic materials are processed through special processes, such as bleaching, pressing, and drying, to obtain the insulating paper with excellent electrical insulation performance, mechanical strength, wear resistance, and heat resistance.

[0058] Moreover, the insulating paper also has the following characteristics:

[0059] High insulation performance: It can effectively prevent the passage of current and ensure the normal operation and safety of electrical equipment.

[0060] Mechanical strength: It has the necessary physical strength to withstand mechanical stresses, such as vibration or extrusion during equipment operation.

[0061] Dimensional stability: The thickness is generally between 0.1 and 0.76 mm, with a moderate size, and the size change is small under different temperature and humidity conditions.

[0062] Heat resistance: It can maintain structural stability and insulation performance at a relatively high working temperature.

[0063] Wear resistance and tear resistance: It is guaranteed not to be easily damaged during long-term use, thus extending the service life.

[0064] Among them, the insulating material 40 is insulating glue, and the insulating glue is applied to the left and right side seals and the bottom of the battery cell body; or, the insulating glue is applied to the left and right sides and the bottom inside the metal housing 20 opposite to the side seals of the battery cell body.

[0065] Specifically, the battery cell body 10 can also be insulated from the metal housing 20 by applying the insulating glue. The specific method is as follows.

[0066] Method 1: The insulating glue can be applied to the left and right side edges 101 and the bottom of the battery cell body. That is, the part where the insulating glue is applied on the battery cell body is U-shaped. The insulating glue applied on the battery cell body 10 can insulate between the left and right side edges and the bottom of the battery cell body 10 and the metal shell 20.

[0067] Method 2: The insulating glue can be applied inside the metal shell 20 to insulate between the left and right side edges and the bottom of the battery cell body 10 and the metal shell 20. Specifically, the insulating glue is applied to the left and right sides and the bottom inside the metal shell that are opposite to the side edges of the battery cell body. That is, the part where the insulating glue is applied inside the metal shell is U-shaped. Alternatively, the entire inside of the metal shell can also be coated with the insulating glue.

[0068] The selection and use of the insulating glue need to be comprehensively considered according to factors such as the electrical characteristics of the specific application, the working environment (such as temperature, humidity, corrosiveness, etc.), and the required protection duration. In the embodiments of this application, specific descriptions are not made for the method and type of applying the insulating glue, as long as the metal shell 20 is insulated from the left and right side edges 101 and the bottom of the battery cell body 10 to meet the working requirements.

[0069] The above are the methods that can insulate the metal shell 20 from the left and right side edges 101 and the bottom of the battery cell body 10, but are not limited to the above two methods. The metal shell 20 can also be insulated from the left and right side edges 101 and the bottom of the battery cell body 10 by other means, all within the protection scope of this application.

[0070] There is a gap between the metal shell 20 and the front and rear planes 102 of the battery cell body, and a separator 50 is provided at the gap. The separator 50 is adhered to the front and rear planes 102 of the battery cell body and is used to isolate and position the battery cell body 10 from the metal shell 20. Among them, the separator 50 is a compressible material.

[0071] Specifically, the front and rear surfaces of the battery cell body are planes 102, and there is a gap between the front and rear planes 102 of the battery cell body and the metal shell 20. It can be understood that the front and rear planes 102 of the battery cell body and the metal shell 20 do not directly contact. Because after the battery is used for a period of time, it may expand to varying degrees, that is, the front and rear planes 102 of the battery cell body will deform and expand or expand towards the metal shell 20. Therefore, a gap is provided between the metal shell 20 and the front and rear planes 102 of the battery cell body to reserve space for the possible expansion of the front and rear planes 102 of the battery cell body.

[0072] Moreover, the spacer 50 is provided at the gap, and the spacer 50 is adhered to the front and rear two planes 102 of the battery cell body. That is to say, the gap is for accommodating the spacer 50. Through the spacer 50, the gap between the front and rear two planes 102 of the battery cell body and the metal shell 20 can be filled, that is, the front and rear two planes 102 of the battery cell body and the metal shell 20 are isolated and positioned through the spacer 50. It should be noted that in the embodiment of the present application, the size of the gap is determined by factors such as the performance of the battery cell body 10 and the spacer 50. Here, no specific requirements are made for the size of the gap, as long as the working requirements are met.

[0073] Specifically, the spacer 50 is made of a compressible material. By the characteristics of the compressible material, it can not only prevent the battery cell body 10 from directly contacting the metal shell 20 when assembling the metal shell 20, but also reserve the expansion space of the battery cell body 10 inside the metal shell 20. In the embodiment of the present application, the spacer 50 is a foam material, but it can also be other materials such as silica gel, as long as the material has compressibility.

[0074] In addition, in the embodiment of the present application, in addition to the above-mentioned planes 102 on the front and rear surfaces of the battery cell body, it can also be a curved surface with a certain curvature. The specific setting can be determined according to specific working requirements. Moreover, the bottom of the battery cell body can also be a plane or a curved surface with a certain curvature. Of course, other structures are not excluded.

[0075] The spacer 50 is in a ring structure, and the ring structure is adhered to the front and rear two planes 102 of the battery cell body; or, the spacer 50 is in a strip shape, and the strip is adhered to the opposite upper and lower positions or opposite left and right positions on the front and rear two planes 102 of the battery cell body.

[0076] Specifically, the spacer 50 can be in a ring structure. In the embodiment of the present application, the ring structure is a rectangular ring structure, but other ring structures of other shapes are not excluded, such as an oval ring structure, etc. The middle part of the ring structure is empty, which is the reserved space for the expansion of the battery cell body 10. It can be understood that when the front and rear two planes 102 of the battery cell body expand, the expanded part can expand outward through the empty part in the middle of the ring structure. Moreover, no specific restrictions are made on the size of the empty part in the middle of the ring structure and the width around the ring structure, as long as the requirements are met.

[0077] The spacer 50 can also be in a strip structure. The strip spacer 20 can be pasted at the upper and lower positions opposite to each other on the front and rear planes 102 of the battery cell body, or at the left and right positions opposite to each other on the front and rear planes 102 of the battery cell body, so as to isolate and position the battery cell body 10 from the metal shell 20, and it is sufficient to reserve space for the expansion of the battery cell body 10.

[0078] The above is the specific shape of the spacer 50. Of course, the spacer 50 may also be in other shapes, such as circular, etc. Here, the specific shape of the spacer 50 will not be elaborated in detail. As long as the spacer 50 can isolate and position the battery cell body 10 from the metal shell 20 and reserve space for the possible expansion of the battery cell body 10, it is sufficient.

[0079] Among them, the battery further includes a circuit protection board 60, and the circuit protection board 60 is used to control the conduction and cut-off of the battery charge and discharge circuit; the first surface 601 of the circuit protection board is welded to the battery cell body 10, and a connector 6021 is provided at the front end of the second surface 602 of the circuit protection board, and the connector 6021 passes through the plastic head shell 30.

[0080] The circuit protection board 60 in the battery, also known as the protection module in the battery protection board or battery management system (BMS), is a key component to ensure the safe operation of the battery, especially important when it comes to rechargeable batteries such as lithium-ion batteries. The main functions of the battery protection board include:

[0081] Overcharge protection: Monitor the charging voltage of the battery. When the battery voltage reaches the preset maximum safety value, the protection board will cut off the charging circuit to prevent the battery from being damaged, overheated or exploded due to overcharging.

[0082] Over-discharge protection: Monitor the voltage of the battery during discharge. When the voltage drops below the preset minimum safety threshold, cut off the discharge circuit to prevent the battery from being over-discharged, which helps to extend the battery life and prevent battery damage.

[0083] Over-current protection: Monitor the current during the battery charge and discharge process. If the current exceeds the safety threshold, the protection board will quickly cut off the circuit to avoid the battery from overheating, short-circuiting or being damaged due to excessive current.

[0084] Short-circuit protection: When detecting a short-circuit situation in the circuit, immediately activate the protection mechanism to cut off the connection between the battery and the external circuit and prevent abnormal increase in current from causing safety accidents.

[0085] Temperature protection: Monitor the battery temperature through the built-in temperature sensor. When the battery temperature is too high or too low, the protection board will take corresponding measures, such as restricting the charging rate or stopping the charge and discharge, to prevent battery damage or danger caused by abnormal temperature.

[0086] Balanced management: In some advanced protection boards, there may also be a battery balancing function, which adjusts the voltage between each cell to ensure the consistency of each cell in the battery pack and extends the overall life of the battery pack.

[0087] The battery protection board is usually composed of a microcontroller (MCU), various detection circuits (such as voltage detection, current detection, and temperature detection), protection components (such as MOSFET, PTC, etc.), and necessary passive components, and realizes real-time monitoring and protection of the battery state through precise circuit design and algorithms.

[0088] Therefore, it can be said that the circuit protection board 60 in the battery can be used to control the conduction and cut-off of the battery charging circuit and the discharging circuit. That is, when the voltage detection circuit in the battery detects that its voltage is lower than the lowest safety threshold and below the lowest safety threshold, the circuit protection board 60 will cut off the discharging circuit to turn off the battery discharging circuit, and at this time, the battery needs to be charged in time; when the voltage detection circuit of the battery detects that its voltage is higher than the preset maximum safety value, the circuit protection board 60 will cut off the charging circuit. At this time, there is no need to charge the battery. Through the circuit protection board 60, the damage caused by overcharging and over-discharging of the battery can be prevented, and the service life of the battery can be extended.

[0089] In the embodiment of the present application, the circuit protection board 60 includes a first surface 601 and a second surface 602. The first surface 601 is a rectangular structure, which is welded to the cell body 10. Specifically, nickel sheets are provided on the first surface 601 and / or the second surface 602 of the circuit board, and are welded to the ear 103 provided on the cell body through the nickel sheets, so as to connect the circuit protection board to the cell body. It should also be noted that the welding in the embodiment of the present application may include but is not limited to resistance welding, laser welding, or soldering, etc. In addition, the number of ears 103 provided on the cell body in the embodiment of the present application is 4, and there is no specific requirement for the number of ears 103, as long as the working requirements are met.

[0090] A connector 6021 is provided at the front end of the second surface 602 of the circuit protection board, and the connector 6021 is passed out through the channel 303 of the plastic head shell 30. The connector 6021 is for connecting to an external device.

[0091] It should also be noted that in the embodiment of the present application, the circuit protection board 60 is in a horizontal position, that is, it is bent with the tab 103 on the battery cell body 10 and the top sealing edge of the battery cell body 10, so as to be better connected to the protection circuit board. The size and direction of the bending can be determined according to the specific actual situation. In addition, the circuit protection board 60 can be rotated by 90° to become a vertical position. At this time, the tab on the battery cell body 10 and the top sealing edge of the battery cell body 10 do not need to be bent. It is also possible to rotate the circuit protection board 60 by other angles for connection according to the specific working needs, and judge whether the tab on the battery cell body 10 and the top sealing edge of the battery cell body 10 need to be bent and the size of the bending according to the rotation angle.

[0092] A concave structure 301 is provided below the plastic head shell 30, and the circuit protection board 60 is installed in the concave structure 301.

[0093] Specifically, a concave structure 301 is provided below the plastic head shell 30. The concave structure 301 is for accommodating all parts of the circuit protection board 60 except the connector 6021. When the connector 6021 passes through the channel 303 of the plastic head shell, the rest of the second surface 602 of the circuit protection board is installed in the concave structure 301. That is to say, the battery cell body 10 is connected to the circuit protection board 60, and the circuit protection board 60 is connected to the plastic head shell 30.

[0094] Moreover, a U-shaped baffle 304 is provided around the channel 303 of the plastic head shell. The U-shaped baffle 304 is for protecting the connector 6021 to prevent the connector 6021 from being damaged. In the embodiment of the present application, the U-shaped baffle 304 and the plastic head shell 30 are integrally formed, but it is not excluded that the U-shaped baffle 304 can be connected to the channel 303 of the plastic head shell.

[0095] In the embodiment of the present application, the head shell is the plastic head shell 30, which is convenient for making shapes on the plastic head shell 30, but it is not excluded that the head shell can also be made of other materials, such as a metal head shell.

[0096] In addition, clamping positions 302 are provided on the front and rear sides of the plastic head shell, which are used to be matched and connected with the clamping holes 202 provided at the relative positions of the metal shell 20, so as to cover the plastic head shell 30 at the opening 201 of the metal shell.

[0097] Specifically, clamping positions 302 are provided on the front and rear sides of the concave structure 301 below the plastic head shell 30. The clamping positions 302 are used to be connected in a matching manner with the clamping holes 202 provided at the relative positions on the front and rear sides of the metal shell 20, so as to cover the plastic head shell 30 at the opening 201 of the metal shell. In the embodiment of the present application, two clamping positions 302 are provided on each of the front and rear sides of the concave structure 301. Of course, the number of the clamping holes 202 provided at the relative positions on the front and rear sides of the metal shell 20 is the same as the number of the clamping positions. Here, there is no specific requirement for the comparison of the number of the clamping positions and the clamping holes, as long as the design requirements are met.

[0098] The connection between the plastic head shell 30 and the metal shell 20 can also be achieved by means of threads or other connection methods, which will not be elaborated here.

[0099] It further includes an injection molding structure 70, which is used to fill the gap between the battery cell body and the plastic head shell by injection molding.

[0100] After the above battery is assembled as Figure 2 shown, there may be gaps between various components. The gaps between the plastic head shell 30, the circuit protection board 60 and the battery cell body 10 can be filled by the injection molding method of the injection molding structure 70 to improve the overall stability of the battery. The gaps on other surfaces of the battery cell body 10 or the gaps between other components can also be filled by the injection molding method of the injection molding structure. It can be understood that the gaps inside the battery can all be filled by the injection molding method of the injection molding structure.

[0101] It can be understood that as Figure 1 and Figure 2 shown, when the battery cell body 10 is installed inside the metal shell 20, the circuit protection board 60 is welded to the battery cell body 10, and an insulating material 40 is provided between the battery cell body 10 and the metal shell 20, that is, a U-shaped insulating paper is pasted on the left and right side edges and the bottom of the battery cell body. At the same time, the circuit protection board 60 is also assembled with the plastic head shell 30, and the circuit protection board 60 is installed inside the plastic head shell 30. It is also necessary to integrally inject and fill and shape the gaps between the circuit protection board 60, the battery cell body 10 and the plastic head shell 30, and paste the isolation parts of the annular foam on the front and rear two planes 102 of the battery cell body to isolate and position the battery cell body 10 from the metal shell 20, and the plastic head shell 30 is engaged with the metal shell 20, and the plastic head shell 20 is covered at the opening 201 of the metal shell to complete the assembly of the battery. At the same time, the integrity and structural strength of the battery can also be improved.

[0102] The above is a battery provided in the embodiment of the present application. The outer shell of the present application adopts a metal outer shell. Due to the characteristics of the metal itself, that is, when the wall thickness dimension of the metal outer shell is reduced, the metal outer shell 20 can make more space for the battery cell body 10 inside it, and the size of the battery cell body 10 can be increased to improve the battery capacity. Because the outer shell adopts a metal outer shell, the surface strength of the battery is increased, and the battery cell body 10 can be better protected, so as to better meet the needs of customers.

[0103] It should be noted that although several structures, components or units for implementing related functions are mentioned in the above detailed description, this division is not mandatory. In fact, according to the specific implementation manners of the present application, the features and functions of two or more of the above-described structures, components or units can be embodied in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided and embodied by multiple components, structures or units.

[0104] In addition, although the components of the component or device in the present application and the installation manners between the components are described in a specific order in the drawings, this does not require or imply that the component or device must be designed according to this specific component or the installation manner between the components, or that all the shown components must be included to achieve the desired result. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve the corresponding function, and / or one component can be decomposed into multiple components to achieve the corresponding function, etc.

[0105] Although the present application is disclosed above with preferred embodiments, it is not used to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims of the present application.

Claims

1. A battery, characterized in that: The battery comprises: a battery body, a metal shell and a plastic head shell; The top of the metal shell is an open structure, the battery body is installed inside the metal shell, and an insulating material is provided between the battery body and the metal shell to insulate the battery body from the metal shell; The plastic head shell is connected to the opening of the metal shell to cover the opening.

2. The battery according to claim 1, characterized in that The insulating material is insulating paper, which is in a U-shaped structure, and the U-shaped insulating paper is pasted on the left and right sealing edges and the bottom of the battery body.

3. The battery according to claim 1, characterized in that The insulating material is an insulating glue, and the insulating glue is applied to the left and right sealing edges and the bottom of the battery body; Alternatively, the insulating glue is applied to the left and right sides and the bottom of the interior of the metal shell opposite to the side sealing edges of the battery cell body.

4. The battery according to claim 1, characterized in that A gap is provided between the metal shell and the front and rear planes of the battery body, and an isolating member is provided at the gap. The isolating member is adhered to the front and rear planes of the battery body to isolate and position the battery body and the metal shell, wherein the isolating member is a compressible material.

5. The battery according to claim 4, characterized in that The isolating member is an annular structure, and the annular structure is adhered to the front and rear planes of the battery body; Alternatively, the spacer is in the shape of a strip, and the strip is pasted on the front and rear planes of the battery body at relatively upper and lower positions or relatively left and right positions.

6. The battery according to claim 1, characterized in that It also includes a circuit protection board, which is used to control the on and off of the battery charging and discharging circuit; The first surface of the circuit protection board is welded to the battery body, and a connector is arranged on the front end of the second surface of the circuit protection board, and the connector passes through the plastic head shell.

7. The battery according to claim 6, characterized in that The lower part of the plastic head shell is provided with a concave structure, and the circuit protection board is installed in the concave structure.

8. The battery according to claim 1, characterized in that The front and rear sides of the plastic head shell are provided with clamping positions for matching and connecting with the clamping holes provided at the relative positions of the metal shell, so as to cover the opening of the metal shell with the plastic head shell.

9. The battery according to claim 1, characterized in that It also includes an injection molding structure, which is used to fill the gap between the battery cell body and the plastic head shell by injection molding.

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