A lithium battery production method

Abstract

The present invention discloses a lithium battery production method, which comprises the following steps: step A1, cutting a tube of a set length; step A2, slotting one end of the tube to form a notch and a fan-shaped process groove connected to the notch; step A3, sealing the other end of the tube to form a first limiting portion; step A4, assembling all parts of the battery core assembly except the negative output unit to form an assembly, and loading the assembly into the tube as a whole, and making the embedded portion on the second bracket embedded in the notch; step A5, fixing the negative output unit to the first conductor mounting plate; step A6, sealing the end of the tube with the process groove to form a second limiting portion and a notch on the second limiting portion, at which time the tube is completely formed into a steel shell; step A7, using a heat shrink process to cover the outer side of the steel shell with a plastic film; step A8, pasting a sticker on one end of the steel shell corresponding to the positive output unit. The present invention has a simple production process and low cost.

Description

[0001] This application is a divisional application of the invention patent with application number 2020100799946, application date February 4, 2020, and name “A USB rechargeable lithium battery”. Technical Field

[0002] The invention relates to the technical field of rechargeable batteries, and in particular to a lithium battery production method. Background Art

[0003] The existing rechargeable batteries have a simple structure. When charging, the battery needs to be placed in a special charging stand and connected to the charging stand. Since such charging stands are specially made, it is often difficult for users to find suitable charging equipment when in urgent need, and it is also difficult to find a replacement after the charging stand is lost. In addition, the existing rechargeable batteries on the market have a simple structure, a complex production process, and high costs. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a lithium battery production method with a simple production process and low cost.

[0005] Technical solution: To achieve the above purpose, the lithium battery production method of the present invention is characterized in that it comprises the following steps:

[0006] Step A1, cutting a pipe of a set length;

[0007] Step A2, slotting one end of the pipe to form a slot and a fan-shaped process slot connected to the slot;

[0008] Step A3, sealing the other end of the tube to form a first limiting portion;

[0009] Step A4, assembling all the components of the battery cell assembly except the negative output unit to form an assembly, and placing the assembly as a whole into the tube, and making the embedding portion on the second bracket embed into the notch;

[0010] Step A5, fixing the negative output unit to the first conductor mounting plate;

[0011] Step A6, sealing the end of the pipe material where the process groove is formed, forming a second limiting portion and a notch on the second limiting portion, at which point the pipe material is completely formed into a steel shell;

[0012] Step A7, covering the outer side of the steel shell with a plastic film using a heat shrink process;

[0013] Step A8, pasting a sticker on the end of the steel shell corresponding to the positive output unit.

[0014] Beneficial effects: The lithium battery production method of the present invention can effectively encapsulate the battery cell assembly except the negative output unit into the steel shell, and simultaneously complete the alignment of the indicator light and the USB charging port. The process setting is reasonable, the process is simple, the production cost is low, and the lithium battery produced has a reliable structure and a long life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is the first appearance diagram of the USB rechargeable lithium battery;

[0016] Attached Figure 2 This is the second appearance diagram of the USB rechargeable lithium battery;

[0017] Attached Figure 3 This is an exploded view of a USB rechargeable lithium battery;

[0018] Attached Figure 4 It is a first cross-sectional view of a USB rechargeable lithium battery;

[0019] Attached Figure 5 It is a second cross-sectional view of a USB rechargeable lithium battery;

[0020] Attached Figure 6 This is the structural diagram of the steel shell;

[0021] Attached Figure 7 is a structural diagram of the first bracket;

[0022] Attached Figure 8 is a structural diagram of the second bracket part from a first perspective;

[0023] Attached Fig. 9 is a structural diagram of the second bracket part from a second viewing angle;

[0024] Attached Fig.10 A first perspective structural diagram of a first conductor mounting plate;

[0025] Attached Fig.11 A second perspective structural diagram of the first conductor mounting plate;

[0026] Attached Fig.12 It is a structural diagram of the second conductor mounting plate from a first perspective;

[0027] Attached Fig.13 A second perspective structural diagram of a second conductor mounting plate;

[0028] Attached Fig.14 It is the structural diagram of the negative output conductor;

[0029] Attached Fig.15 This is a structural diagram of a flexible circuit board;

[0030] Attached Fig.16 This is a structural diagram of a steel pipe with notches and process grooves.

[0031] In the figure: 1-steel shell; 1-1-first limiting part; 1-2-second limiting part; 1-3-notch; 1-4-gap; 2-battery cell; 3-first bracket; 3-1-first sleeve part; 4-second bracket; 4-1-second sleeve part; 4-2-embedded part; 4-3-charging port installation part; 5-USB charging port; 6-indicator light; 7-positive output unit; 8-negative output unit; 8-1-recessed part; 9-flexible circuit board; 9-1-connection port; 9-2-first connector; 10-first conductor mounting plate; 10-1-first wire groove; 11-second conductor mounting plate; 11-1-boss part; 11-2-second wire groove; 12-first output conductor; 13-second output conductor; 14-screw; 15-plastic film; 16-face sticker; 17-second connector; 18-third connector; 19-pipe. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings. It is worth noting that the sizes and proportions of the components in the accompanying drawings do not represent the actual design sizes and proportions of the products.

[0033] As attached Figure 1-5 The USB rechargeable lithium battery shown comprises a steel shell 1 and a battery cell assembly. The outer side of the steel shell 1 is covered with a plastic film 15. Both ends of the plastic film 15 have inner extensions extending inwards and covering the first limiting portion 1-1 and the second limiting portion 1-2. The battery cell assembly comprises a battery cell 2, a first bracket 3, a second bracket 4, a USB charging port 5, an indicator light 6, a positive output unit 7, a negative output unit 8 and a flexible circuit board 9. In the battery cell assembly, except for the negative output unit 8, all components are installed in the steel shell 1. Among them:

[0034] As attached Figure 6 As shown, the steel shell 1 is hollow cylindrical, and has a first limiting portion 1-1 at one end and a second limiting portion 1-2 at the other end. The first limiting portion 1-1 and the second limiting portion 1-2 are both annular. The first limiting portion 1-1 and the second limiting portion 1-2 are used to limit the battery core assembly so that the battery core assembly will not escape from the steel shell 1. The steel shell 1 is an integrally formed part with a stable structure and good protective effect. A notch 1-3 is formed on the side wall of the steel shell 1 on the side close to the second limiting portion 1-2, and a notch 1-4 connected to the notch 1-3 is formed on the second limiting portion 1-2.

[0035] The positive output unit 7 is connected to the positive electrode of the battery cell 2 , and the negative output unit 8 is connected to the negative electrode of the battery cell 2 . The positive output unit 7 and the negative output unit 8 are used to output electric quantity.

[0036] There is an annular gap between the outer circumference of the battery cell 2 and the inner wall of the steel shell 1. The main body of the flexible circuit board 9 is placed in the annular gap, and the main body is provided with a charge and discharge management circuit; the USB charging port 5 and the indicator light 6 are connected to the charge and discharge management circuit, and the charge and discharge management circuit connects the positive and negative poles of the battery cell 2; it is also used to establish the connection between the positive output unit 7 and the negative output unit 8 and the battery cell 2. The charge and discharge management circuit can play the role of charging protection, discharge management, power statistics, etc. After the USB charging port 5 is connected to the power supply, the battery cell 2 is charged through the charge and discharge management circuit, and the charge and discharge management circuit can count the remaining power in the battery cell 2 and indicate the remaining power through the indicator light 6.

[0037] Specifically, a first bracket 3 and a second bracket 4 are respectively installed at both ends of the battery cell 2. Figure 7 As shown, the first bracket 3 is formed with a first sleeve portion 3-1 sleeved on the negative terminal of the battery core 2, and its outer edge fits and cooperates with the inner wall of the steel shell 1; as shown in the attached Figure 8-9 As shown, a second sleeve portion 4-1 is formed on the second bracket 4 and is sleeved on the positive end of the battery cell 2, and its outer edge fits and cooperates with the inner wall of the steel shell 1, and an embedding portion 4-2 is formed thereon and is embedded in the notch 1-3; the effective radius of the outer contour of the first bracket 3 and the second bracket 4 is greater than the effective maximum radius of the battery cell 2, so that a ring gap that can accommodate the flexible circuit board 9 can be formed around the periphery of the battery cell, and the flexible circuit board 9 is installed in the ring gap. In comparison, the traditional PCB board needs to occupy more space. The flexible circuit board 9 used in this embodiment is arranged on the periphery of the battery cell 2, with a compact structure, which is conducive to improving the utilization rate of the space inside the steel shell 1, and the saved space can accommodate a larger battery cell 2, so that the lithium battery has a larger power capacity.

[0038] The indicator light 6 is embedded in the embedding portion 4-2 and its outward side is exposed. This arrangement can solve the problem of fixing the indicator light 6. Since the steel shell 1 has a notch 1-3 and a gap 1-4, when producing the battery, when the second limiting portion 1-2 on the steel shell 1 has not yet been formed, the second bracket 4 can be installed from the side of the steel shell 1 with the notch 1-3, and the embedding portion 4-2 is embedded in the notch 1-3. On the one hand, the second bracket 4 can be effectively positioned circumferentially, and on the other hand, the indicator light 6 can be exposed to the outside of the steel shell 1 to illuminate for user reference. In this way, the alignment problem of the indicator light 6 and its exposed notch can be solved, and the second bracket 4 can be prevented from moving in the axial direction of the steel shell, which is convenient for identification assembly and positioning and fixing; the gap 1-4 is arranged in conjunction with the notch 1-3, so that before the second limiting portion 1-2 is formed, the embedding portion 4-2 on the second bracket 4 can be smoothly installed in the notch 1-3 on the steel shell 1.

[0039] The USB charging port 5 is fixed relative to the steel shell 1. Specifically, a charging port mounting portion 4-3 is also formed on the second bracket 4. The charging port mounting portion 4-3 has a charging port accommodating hole. The USB charging port 5 is embedded in the charging port accommodating hole. An exposure hole is provided on the steel shell 1 at a position corresponding to the USB charging port 5. In this way, not only can the USB charging port 5 be strengthened so that it will not become loose due to long-term plugging and unplugging, but also because the USB charging port 5 and the indicator light 6 are both mounted on the second bracket 4, due to the cooperation of the embedded portion 4-2 on the second bracket 4 and the slot 1-3, the USB charging port 5 and the exposure hole can also be fully aligned and relatively fixed.

[0040] Furthermore, the battery cell assembly further includes a first conductor mounting plate 10 and a second conductor mounting plate 11; the first conductor mounting plate 10 is mounted on the first bracket 3, as shown in the attached Figure 10-11 As shown, the negative output unit 8 is mounted on the first conductor mounting plate 10, and a plurality of first output conductors 12 are also mounted on the first conductor mounting plate 10, each of the first output conductors 12 is connected to one of the positive and negative poles of the battery cell 2, and at least one of the first output conductors 12 is connected to the positive pole of the battery cell 2; a second conductor mounting plate 11 is mounted on the second bracket 4, and the positive output unit 7 is mounted on the second conductor mounting plate 11, and a plurality of second output conductors 13 are also mounted on the second conductor mounting plate 11, each of the second output conductors 13 is connected to one of the positive and negative poles of the battery cell 2, and at least one of the second output conductors 13 is connected to the negative pole of the battery cell 2; each of the first output conductors 12 and the second output conductors 13 are connected to the battery cell 2 through the internal circuit of the flexible circuit board 9. With the above structure, two power output electrodes are provided at each end of the lithium battery, so that the lithium battery has more uses. On the one hand, the user can directly use the positive output unit 7 and the negative output unit 8 as power supply electrodes to supply power to the electrical equipment. On the other hand, more output lines can be drawn from the lithium battery by welding wires on the first output conductor 12 and the second output conductor 13 to simultaneously meet the complex power supply needs of the outside world, so that the lithium battery has better applicability. The internal lines of the flexible circuit board 9 are used to connect the first output conductor 12, the second output conductor 13 and the battery cell 2, so that the wiring inside the steel shell 1 is regular and not chaotic.

[0041] Preferably, as attached Figure 12-13As shown, the positive output unit 7 is installed in the center of the second conductor mounting plate 11, the second output conductor 13 is a metal block, and all the second output conductors 13 form a linear array distributed along the radial direction of the steel shell 1, and the linear array is placed in the notch 1-4, so that the notch 1-4 is used to expose the second output conductor 13. Specifically, a boss portion 11-1 is formed on the second conductor mounting plate 11, and the boss portion 11-1 is embedded in the notch 1-4; the second output conductor 13 is buried in the second conductor mounting plate 11, and the upper end of the second output conductor 13 is exposed from the upper end of the boss portion 11-1. In this way, the second conductor mounting plate 11 is prevented from rotating relative to the steel shell 1 by the cooperation of the second conductor mounting plate 11 and the notch 1-4, so as to prevent the second conductor mounting plate 11 from rotating relative to the steel shell 1 and causing the second output conductor 13 to contact the steel shell 1. The boss portion 11-1 plays a compensating and filling role, and its upper end is flush with the end face of the steel shell 1, so that there is no sharp edge on the steel shell 1, so as to prevent cutting users and damaging the plastic film 15 wrapped around the outside of the steel shell 1.

[0042] Preferably, a surface sticker 16 is attached to the end surface of the steel shell 1, and the surface sticker 16 covers the second output conductor 13; a through hole is provided in the center of the surface sticker 16 to expose the positive output unit 7. In normal use, the positive output unit 7 is the main output part. When the user has more connection requirements, the surface sticker 16 can be removed to expose all the second output conductors 13, so as to make circuit connections.

[0043] Preferably, all the first output conductors 12 are ring-shaped with different diameters, and all the first output conductors 12 are concentrically arranged; the negative output unit 8 is a circular metal sheet, and it is detachably arranged relative to the first conductor mounting plate 10; when the negative output unit 8 is fixed on the first conductor mounting plate 10, it covers all the first output conductors 12. Specifically, the inner side of the negative output unit 8 is covered with an insulating layer; as shown in the attached Fig.14As shown, the center of the negative output unit 8 has a recessed portion 8-1, and the center of the recessed portion 8-1 has a screw hole. The screw 14 passes through the screw hole and is screwed and fixed on the first conductor mounting plate 10, and its edge is placed on the outside of the first limiting portion 1-1 and contacts the first limiting portion 1-1. Due to the setting of the recessed portion 8-1, the tail of the screw 14 will not be exposed. In this way, during normal use, the negative output unit 8 is the main output part. When the user has more connection requirements, the negative output unit 8 can be removed to expose all the first output conductors 12, so as to make circuit connections. Preferably, the insulating layer is rubber, and the insulating layer on the back of the negative output unit 8 is used to prevent the negative output unit 8 from being connected to other first output conductors 12. The edge of the negative output unit 8 contacts the first limiting portion 1-1 to play a sealing role.

[0044] Preferably, the main body of the flexible circuit board 9 is cylindrical, which is sleeved on the outside of the battery cell 2. Not only the charge and discharge management circuit is formed on it, but also an independent connection line is formed. The flexible circuit board 9 is also formed with a connection port 9-1 for connecting the charge and discharge management circuit and the connection line to other components in the steel shell 1. The connection port 9-1 extends out of the main body of the flexible circuit board 9 in the form of a cable, and the connection port 9-1 is connected to the first plug-in connector 9-2; the second conductor mounting plate 11 is mounted with a third plug-in connector 18, and the second conductor mounting plate 11 is formed with a second wire groove 11-2. The indicator light 6, the USB charging port 5, the positive electrode of the battery cell 2, the positive output unit 7, and the second output conductor 13 are respectively connected to the third plug-in connector 18 through cables placed in the second wire groove 11-2, and the third plug-in connector 18 is plug-connected with the first plug-in connector 9-2. A notch is formed on the second bracket 4, so that a wiring groove for the cable to pass through is formed between the two sides of the second bracket 4 and the steel shell 1.

[0045] The second connector 17 is installed on the first conductor mounting plate 10, and a first wire groove 10-1 is formed on the first conductor mounting plate 10. The indicator light 6, the USB charging port 5, the positive electrode of the battery cell 2, the positive output unit 7, and the second output conductor 13 are respectively connected to the second connector 17 through cables placed in the first wire groove 10-1. Each second connector 17 is plug-connected with a separate first connector 9-2. A notch is formed on the first bracket 3, so that a wiring groove for the cable to pass through is formed between the two sides of the first bracket 3 and the steel shell 1.

[0046] Through the above structure, the wiring inside the internal steel shell 1 is simple, and the battery cell assembly is easy to assemble. The line connection can be completed by simply connecting the corresponding connectors, which is convenient.

[0047] The present invention also provides a method for producing a lithium battery, which comprises the following steps:

[0048] Step A1, cutting a pipe 19 of a set length;

[0049] Step A2, slotting one end of the tube 19 to form a slot 1-3 and a fan-shaped process slot 19-1 connected to the slot 1-3; Fig.16 As shown;

[0050] Step A3, sealing the other end of the tube 19 to form a first limiting portion 1-1;

[0051] Step A4, assembling all the components of the battery cell assembly except the negative output unit 8 to form an assembly, and placing the assembly as a whole into the tube 19, and making the embedding portion 4-2 on the second bracket 4 embed into the notch 1-3;

[0052] Step A5, fixing the negative output unit 8 to the first conductor mounting plate 10;

[0053] In this step, the negative output unit 8 is first fixed to the first conductor mounting plate 10. Since the negative output unit 8 is placed on the outside of the first limiting portion 1-1 and the edge of the negative output unit 8 contacts the edge of the first limiting portion 1-1, the negative output unit 8 can play a limiting role to prevent the assembly from axially moving relative to the steel shell 1 in subsequent operation processes, which is beneficial to the subsequent production process.

[0054] Step A6, sealing the end of the tube 19 where the process groove 19-1 is formed, forming the second limiting portion 1-2 and the notch 1-4 on the second limiting portion 1-2. At this time, the tube 19 is completely formed into a steel shell 1;

[0055] Step A7, using a heat shrink process to cover the outer side of the steel shell 1 with a plastic film 15;

[0056] Step A8, attaching a sticker 16 to the end of the steel shell 1 corresponding to the positive output unit 7.

[0057] The above method can effectively encapsulate the battery cell assembly except the negative output unit 8 into the steel shell 1, and simultaneously complete the alignment of the indicator light 6 and the USB charging port 5. The process setting is reasonable, the process is simple, the production cost is low, and the lithium battery produced has a reliable structure and a long life.

[0058] In the above step A4, assembling all the components of the battery cell assembly except the negative output unit 8 to form an assembly specifically includes the following steps:

[0059] Step B1, pre-assembling the first bracket 3, the first conductor mounting plate 10, the second connector 17, and the first output conductor 12, and performing line connection to form a first assembly;

[0060] Step B2, pre-assembling the second bracket 4, the second conductor mounting plate 11, the third connector 18, the second output conductor 13, the positive output unit 7, the indicator light 6 and the USB charging port 5, and connecting the lines to form a second assembly;

[0061] Step B3, sleeve the flexible circuit board 9 onto the outer side of the battery core 2;

[0062] Step B4, respectively connecting the first assembly and the second assembly to the negative electrode and the positive electrode of the battery cell 2 through the first connecting portion 3-1 and the second connecting portion 4-1;

[0063] Step B5, plugging and connecting each first connector 9 - 2 on the flexible circuit board 9 with the corresponding second connector 17 and third connector 18 respectively.

[0064] The above assembly process steps are reasonable and the assembly is convenient. The assembled assembly is concise and clear, the wiring is not disordered, and the subsequent assembly operation is convenient.

[0065] The USB rechargeable lithium battery of the present invention has a universal USB interface, and users can charge it through a universal USB data cable, which is convenient to charge. The battery cell can be stably installed in the steel sleeve by arranging the first bracket and the second bracket, and an annular gap for a flexible circuit board is formed between the steel sleeve and the battery cell, so that the overall structure of the battery is compact and the internal space utilization rate is high.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lithium battery production method, characterized in that: It includes the following steps: Step A1, cutting a pipe of a set length; Step A2, slotting one end of the pipe to form a slot and a fan-shaped process slot connected to the slot; Step A3, sealing the other end of the tube to form a first limiting portion; Step A4, assembling all the components of the battery cell assembly except the negative output unit to form an assembly, and placing the assembly as a whole into the tube, and making the embedding portion on the second bracket embed into the notch; The battery cell assembly includes a battery cell, a first bracket, a second bracket, a USB charging port, an indicator light, a positive output unit, a negative output unit and a flexible circuit board; in the battery cell assembly, except for the negative output unit, all components are installed in the tube; the first bracket and the second bracket are respectively installed at both ends of the battery cell; a first sleeve portion is formed on the first bracket and is sleeved on the negative end of the battery cell, and the outer edge of the first bracket fits and cooperates with the inner wall of the tube; a second sleeve portion is formed on the second bracket and is sleeved on the positive end of the battery cell, and the outer edge of the second bracket fits with the inner wall of the tube and cooperate with each other, and an embedded portion is formed on the second bracket; a first conductor mounting plate is installed on the first bracket; a charging port mounting portion is also formed on the second bracket, and the charging port mounting portion has a charging port accommodating hole, and the USB charging port is embedded in the charging port accommodating hole; the indicator light is embedded in the embedded portion and its outward side is in an exposed state; a second conductor mounting plate is installed on the second bracket, and the positive output unit is installed on the second conductor mounting plate; a ring gap is left between the outer circumference of the battery core and the inner wall of the tube, and the main body of the flexible circuit board is placed in the ring gap; Step A5, fixing the negative output unit to the first conductor mounting plate; Step A6, sealing the end of the pipe material where the process groove is formed, forming a second limiting portion and a notch on the second limiting portion, at which point the pipe material is completely formed into a steel shell; Step A7, covering the outer side of the steel shell with a plastic film using a heat shrink process; Step A8, pasting a sticker on the end of the steel shell corresponding to the positive output unit.

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