Sealed and waterproof rechargeable battery

Abstract

The present invention discloses a sealed and waterproof recyclable rechargeable battery. The battery cell, circuit protection board, plastic cap, and positive electrode cover plate can be connected to each other through coaxial plug-in matching. The circuit protection board, plastic cap, and positive electrode cover plate are stacked together in sequence to facilitate the reserved accommodation space arranged along the axial direction of the battery to accommodate the circular receiving groove arranged along the axial direction of the plastic cap. In this way, an adsorption-type charging head can be arranged in the circular receiving groove. The outer peripheral wall of the adsorption-type charging head can be tightly fitted with the inner wall of the circular receiving groove to achieve sealing at the charging port position, so as to provide a reliable basis for the sealing and waterproofing of the rechargeable battery. In addition, an annular receiving groove is provided on the side of the plastic cap away from the battery cell, and an annular protrusion is provided on the edge of the positive electrode cover plate. During assembly, the sealing and matching of the positive electrode cover plate and the annular protrusion is achieved through the interference fit between the annular protrusion and the annular receiving groove, thereby ensuring the sealing and waterproofing effect between the plastic cap and the positive electrode cover plate.

Description

Technical Field

[0001] The invention relates to the technical field of rechargeable batteries, and in particular to a sealed and waterproof rechargeable battery that can be recycled. Background Art

[0002] There are two main types of rechargeable lithium batteries, one is an integrated rechargeable battery with a built-in USB charging port, and the other is a rechargeable battery with a separate battery and charger.

[0003] Existing rechargeable batteries with built-in USB charging interfaces generally consist of an outer shell, a battery cell, an integrated circuit protection board (PCBA), a plastic shell, a surface shell, and a positive terminal. The battery cell, the integrated circuit protection board (PCBA), the plastic shell, and the surface shell are sequentially mounted on the outer shell, the integrated circuit protection board is inserted into the plastic shell and connected to the battery cell through a wire, the positive terminal is fixed to an end of the surface shell away from the battery cell and connected to the integrated circuit protection board through a wire, and the outer shell is connected to the integrated circuit protection board through a wire, so that the positive terminal is the output positive pole of the battery, and the bottom cover is the output negative pole of the battery.

[0004] Due to the complex structure and complicated assembly of the above-mentioned battery, it is difficult to apply a contact-type electrical connection plug to such a battery structure, and a USB interface is generally used as a charging port. Therefore, the existing cylindrical rechargeable battery cannot be effectively sealed and waterproof, and external water vapor will penetrate into the battery through the USB interface, damaging the internal circuit protection board and battery core, affecting the normal use of the battery. Summary of the invention

[0005] In view of the problems existing in the prior art, the main purpose of the present invention is to provide a sealed and waterproof recyclable rechargeable battery.

[0006] To achieve the above-mentioned purpose, the sealed and waterproof recyclable rechargeable battery proposed in the present invention comprises a shell, a battery cell, a circuit protection board, a plastic cap, a positive electrode cover plate and an adsorption-type charging head;

[0007] The battery cell is inserted into the housing, the upper end of the battery cell has a plug pin extending outward from the battery cell body, the circuit protection board is provided with a pin sleeve matching the plug pin, and the battery cell and the circuit protection board are electrically connected through the plug pin and the pin sleeve;

[0008] The plastic cap is sealed and inserted into the opening of the shell, and the circuit protection board is buckled on the side of the plastic cap close to the battery core and parallel to the plastic cap; an annular receiving groove is provided on the side of the plastic cap away from the battery core, and the edge of the positive electrode cover plate has an annular protrusion, which is clamped in the annular receiving groove and tightly fits with the outer annular groove wall of the annular receiving groove;

[0009] The plastic cap is provided with a circular receiving groove, the adsorption type charging head is sealed and inserted in the circular receiving groove, and is electrically connected to the circuit protection board.

[0010] Optionally, the adsorption-type charging head includes a first conductive needle, a second conductive needle and an insulating sealing sleeve;

[0011] The insulating sealing sleeve has a hollow cylinder at its center, and the first end of the first conductive needle is coaxially inserted into the hollow cylinder; a conductive ring is sleeved on the outer periphery of the hollow cylinder, and the first end of the second conductive needle vertically passes through the insulating sealing sleeve and is connected to the conductive ring;

[0012] The circuit protection board is provided with a socket that cooperates with the first conductive pin and the second conductive pin, and the adsorption-type charging head and the circuit protection board are electrically connected by the insertion of the first conductive pin and the second conductive pin into the corresponding socket.

[0013] Optionally, the annular protrusion of the positive electrode cover plate has a conductive portion extending along its axial direction, and the circuit protection board is provided with a contact piece corresponding to the conductive portion, and the positive electrode cover plate and the circuit protection board are electrically connected through the contact between the conductive portion and the contact piece.

[0014] Optionally, the end of the conductive portion has an arc-shaped bending portion, and when the arc-shaped bending portion contacts the contact sheet, it is squeezed by the contact sheet and deformed along the bending arc.

[0015] Optionally, the outer side surface of the conductive portion is in contact with the inner side surface of the peripheral wall of the plastic cap, and the arc-shaped bent portion protrudes from the peripheral wall of the plastic cap.

[0016] Optionally, the annular protrusion of the positive electrode cover plate has a plurality of deformation portions extending along its axial direction. When the annular protrusion is clamped in the annular receiving groove, the deformation portion is bent and deformed toward the center of the positive electrode cover plate under the action of external force to be tightly buckled on the inner side of the plastic cap.

[0017] Optionally, notches corresponding to the deformation parts are provided on the peripheral wall of the plastic cap.

[0018] Optionally, the peripheral wall of the plastic cap has a plurality of undercut portions extending along its axial direction, and the peripheral side of the circuit protection board has avoidance grooves corresponding to the undercut portions one by one. When the battery is assembled, the buckling positions of the undercut portions pass through the avoidance grooves and are buckled onto the back side of the circuit protection board, pressing the circuit protection board onto the end of the peripheral wall of the plastic cap.

[0019] Optionally, the outer peripheral edge of the plastic cap has an edge protrusion that abuts against the edge of the opening of the shell.

[0020] Optionally, the number of the battery cells is set to three, and the three battery cells are arranged in a triangular shape.

[0021] The rechargeable battery provided by the present invention, the battery cell, the circuit protection board, the plastic cap, and the positive electrode cover plate can be connected to each other through coaxial plug-in cooperation, and the circuit protection board, the plastic cap, and the positive electrode cover plate are stacked together in sequence to facilitate the reservation of an accommodating space arranged along the axial direction of the battery to accommodate a circular receiving groove arranged along the axial direction of the plastic cap. In this way, an adsorption-type charging head can be arranged in the circular receiving groove, and the outer peripheral wall of the adsorption-type charging head can be tightly fitted with the inner wall of the circular receiving groove to achieve sealing at the charging port position, thereby providing a reliable basis for the sealing and waterproofing of the rechargeable battery.

[0022] In addition, an annular receiving groove is provided on the side of the plastic cap away from the battery cell, and an annular protrusion is provided on the edge of the positive cover plate. During assembly, the positive cover plate and the annular protrusion are sealed by the interference fit between the annular protrusion and the annular receiving groove, thereby ensuring the sealing and waterproof effect between the plastic cap and the positive cover plate.

[0023] In addition, a pin extending outward from the battery cell body is provided on the battery cell, and a pin sleeve matching the pin is provided on the circuit protection board, so that the battery cell and the circuit protection board can quickly form an electrical connection through the plug-in cooperation of the pin and the pin sleeve, eliminating the trouble of welding wires, reducing the difficulty of assembling the rechargeable battery, and providing a basis for the coaxial connection of the battery cell and the circuit protection board.

[0024] Moreover, the circuit protection board and the plastic cap are arranged in parallel, which can greatly reduce the space occupied by the circuit protection board in the battery, so that more space can be reserved for arranging large-volume and large-capacity batteries, thereby increasing the capacity of the rechargeable battery.

[0025] Moreover, the circuit protection board and the plastic cap are snap-fitted together. During assembly, the positive electrode cover, the plastic cap, and the circuit protection board can be snapped together in sequence to complete the interconnection, which greatly improves the convenience of battery assembly and effectively saves battery assembly time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment of a sealed and waterproof recyclable rechargeable battery of the present invention;

[0027] Figure 2 It is an exploded schematic diagram of an embodiment of a sealed and waterproof recyclable rechargeable battery of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the circuit protection board;

[0029] Figure 4 It is a schematic diagram of the structure of the plastic cap;

[0030] Figure 5Schematic diagram of the structure of the positive electrode cover;

[0031] Figure 6 This is a schematic diagram of the structure of the adsorption type charging head;

[0032] Figure 7 This is a disassembled schematic diagram of the adsorption-type charging head;

[0033] Figure 8 A schematic diagram of the electrical connection between the circuit protection board and the battery cell;

[0034] Fig. 9 A schematic diagram of the electrical connection between the positive electrode cover plate and the circuit protection board;

[0035] Fig.10 It is a schematic diagram of the coupling between the positive electrode cover plate and the plastic cap;

[0036] Fig.11 It is a schematic diagram of the connection between the circuit protection board and the plastic cap. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] Please refer to the instruction manual Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Fig.10 In an embodiment of the present invention, a sealed and waterproof recyclable rechargeable battery is proposed, which includes a shell 1, a battery cell 2, a circuit protection board 3, a plastic cap 4, a positive electrode cover 5 and an adsorption-type charging head 6.

[0039] The battery cell 2 is inserted into the housing 1, and the upper end of the battery cell 2 has a pin 2a extending outward from the battery cell 2 body. The circuit protection board 3 is provided with a pin sleeve 31 that cooperates with the pin 2a. The battery cell 2 and the circuit protection board 3 are electrically connected through the insertion of the pin 2a and the pin sleeve 31.

[0040] The circuit protection board 3 is provided with a charging management chip and electronic components constituting its auxiliary circuits. The charging management chip can realize constant voltage output, charging management and protection, overcurrent, overcharge and overdischarge protection, so as to improve the intelligent charging and discharging of the rechargeable battery and improve the safety of the use of the rechargeable battery. In this embodiment, the charging management chip and the electronic components are attached to the circuit protection board 3 in the form of SMT patches, which can effectively reduce the volume of the circuit protection board 3 to a degree equal to the size of the end face of the plastic cap 4, so that the circuit protection board 3 can be arranged parallel to the plastic cap 4, so that it can be clamped on the plastic cap 4 and inserted into the housing 1 together with the plastic cap 4.

[0041] The plastic cap 4 is inserted into the opening of the shell 1. The plastic cap 4 has a certain elasticity. When inserted into the opening of the shell 1, it can fit tightly with the inner wall of the opening to prevent external water vapor from entering the inside of the shell 1 along the connection between the plastic cap 4 and the shell 1. At the same time, in order to further improve the tightness of the connection between the plastic cap 4 and the shell 1, when the plastic cap 4 is clamped into the opening of the shell 1, steel points can be punched on the outer periphery of the shell 1 to form concave points convex to the peripheral wall of the plastic cap 4 to clamp the plastic cap 4, further improve the tightness of the combination of the two, and improve the waterproof performance of the battery.

[0042] The circuit protection board 3 is buckled on the side of the plastic cap 4 close to the battery cell 2 and is parallel to the plastic cap 4. The side of the plastic cap 4 away from the battery cell 2 is provided with an annular receiving groove 4a, and the edge of the positive electrode cover plate 5 has an annular protrusion 5a, which is snapped into the annular receiving groove 4a and tightly fits with the outer ring groove wall of the annular receiving groove 4a to form a sealed fit between the positive electrode cover plate 5 and the plastic cap 4.

[0043] A circular receiving groove 4b is provided on the plastic cap 4, and the circular receiving groove 4b extends along the axial direction of the plastic cap 4, so that the circular receiving groove 4b has a certain depth. The cylindrical adsorption type charging head 6 is inserted into the circular receiving groove 4b, and the adsorption type charging head 6 and the circular receiving groove 4b are interference fit, and the outer peripheral wall of the adsorption type charging head 6 is closely fitted with the groove wall of the circular receiving groove 4b to achieve a sealing and waterproof effect.

[0044] In the rechargeable battery provided by the present invention, the battery cell 2, the circuit protection board 3, the plastic cap 4, and the positive electrode cover plate 5 can be connected to each other through coaxial plug-in cooperation. The circuit protection board 3, the plastic cap 4, and the positive electrode cover plate 5 are stacked together in sequence to facilitate the reservation of an accommodating space arranged along the axial direction of the battery to accommodate the circular receiving groove 4b of the plastic cap 4 arranged along the axial direction of the battery. In this way, an adsorption type charging head 6 can be arranged in the circular receiving groove 4b. The outer peripheral wall of the adsorption type charging head 6 can fit tightly with the inner wall of the circular receiving groove 4b to achieve sealing at the charging port position, thereby providing a reliable basis for the sealing and waterproofing of the rechargeable battery.

[0045] In addition, an annular receiving groove 4a is provided on the side of the plastic cap 4 away from the battery core 2, and an annular protrusion 5a is provided on the edge of the positive cover plate 5. During assembly, the positive cover plate 5 and the annular protrusion 5a are sealed by the interference fit between the annular protrusion 5a and the annular receiving groove 4a, thereby ensuring the sealing and waterproof effect between the plastic cap 4 and the positive cover plate 5.

[0046] In addition, a pin 2a extending outward from the battery cell 2 body is provided on the battery cell 2, and a pin sleeve 31 matching the pin 2a is provided on the circuit protection board 3, so that the battery cell 2 and the circuit protection board 3 can quickly form an electrical connection through the plug-in cooperation of the pin 2a and the pin sleeve 31, eliminating the trouble of welding wires, reducing the difficulty of assembling the rechargeable battery, and providing a basis for the coaxial connection between the battery cell 2 and the circuit protection board 3.

[0047] Moreover, the circuit protection board 3 and the plastic cap 4 are arranged in parallel, which can greatly reduce the space occupied by the circuit protection board 3 in the battery, so as to reserve more space for arranging large-volume and large-capacity battery cells 2, thereby improving the capacity of the rechargeable battery.

[0048] Moreover, the circuit protection board 3 and the plastic cap 4 are snap-fitted together. During assembly, the positive electrode cover 5, the plastic cap 4, and the circuit protection board 3 can be snap-fitted together in sequence to complete the interconnection, which greatly improves the convenience of battery assembly and effectively saves battery assembly time.

[0049] like Figure 2 As shown, in this embodiment, an insulating film 21 is provided at the bottom of the battery core 2 , and when the battery core 2 is inserted into the housing 1 , it is fixed in the housing 1 by the insulating film 21 .

[0050] like Figure 8 As shown, in this embodiment, a negative electrode conductive sheet 32 ​​is provided on the peripheral side of the circuit protection board 3, the upper end of the negative electrode conductive sheet 32 ​​is welded to the circuit protection board 3, and the lower end thereof extends downward along the axial direction of the battery cell 2. Therefore, during assembly, as long as the circuit protection board 3 is inserted into the opening of the housing 1 with the plastic cap 4, the outer side of the body of the negative electrode conductive sheet 32 ​​contacts the inner side of the housing 1 to form an electrical connection, thereby guiding the negative electrode of the battery to the bottom of the housing 1.

[0051] As preferably, Figure 8 As shown, in this embodiment, the upper end of the negative electrode conductive sheet 32 ​​is bent 90 degrees toward the board surface of the circuit protection board 3 to form a bent portion 32a parallel to the circuit protection board 3 to facilitate welding the negative electrode conductive sheet 32 ​​to the circuit protection board 3.

[0052] Alternatively, if Figure 1-2 As shown, in this embodiment, the exterior of the housing 1 is wrapped with a PVC heat shrink film 7 to protect the housing 1 .

[0053] Alternatively, if Figure 6-7 As shown, the suction-type charging head 6 includes a first conductive pin 61, a second conductive pin 62 and an insulating sealing sleeve 63. In this embodiment, the first conductive pin 61 is a positive electrode, and the second conductive pin 62 is a negative electrode. The external power source can be electrically connected to the rechargeable battery through the female connector matched with the suction-type charging head 6 to charge the battery cell 2 inside it.

[0054] The center of the insulating sealing sleeve 63 has a hollow cylinder 63a, and the first end of the first conductive needle 61 is coaxially inserted into the hollow cylinder 63a. The outer periphery of the hollow cylinder 63a is provided with a conductive ring 64, and the first end of the second conductive needle 62 vertically passes through the insulating sealing sleeve 63 and is connected to the conductive ring 64. There is a hollow cylinder 63a between the conductive ring 64 and the first conductive needle 61 to play an insulating role, so as to prevent the first conductive needle 61 from forming an electrical connection with the second conductive needle 62 through the conductive ring 64.

[0055] The circuit protection board 3 is provided with a socket 3a that matches the first conductive pin 61 and the second conductive pin 62. During assembly, the suction-type charging head 6 and the circuit protection board 3 are electrically connected by plugging the first conductive pin 61 and the second conductive pin 62 into the corresponding socket 3a.

[0056] By providing a first conductive needle 61 and a second conductive needle 62 on the adsorption-type charging head 6 and providing a corresponding socket 3a on the circuit protection board 3, the adsorption-type charging head 6 can form an electrical connection in a plug-in manner, eliminating the trouble of welding wires and improving the convenience of assembling the rechargeable battery.

[0057] Furthermore, an insulating sealing sleeve 63 is provided on the suction-type charging head 6, and the insulating sealing sleeve 63 can form a tight fit with the circular receiving groove 4b of the plastic cap 4, further improving the sealing matching effect between the suction-type charging head 6 and the plastic cap 4. Furthermore, the insulating sealing sleeve 63 can also tightly cover the first conductive pin 61 and the second conductive pin 62, preventing external water vapor from penetrating into the rechargeable battery along the second conductive pin 62 and the second conductive pin 62.

[0058] As preferably, Figure 7 As shown, in this embodiment, the upper end 61a of the first conductive needle 61 is thickened and extends outward to protrude from the plane where the conductive ring 64 is located. This can increase the cross-sectional area of ​​current conduction, increase the charging current that the battery can withstand, and improve the safety of battery charging and discharging. The end of the first conductive needle 61 protrudes from the conductive ring 64 to further reduce the probability of electrical connection between the first conductive needle 61 and the conductive ring 64, thereby ensuring the safety of the suction-type charging head 6.

[0059] It should be noted that the above-mentioned adsorption-type charging head 6 is only a preferred implementation in this embodiment. The adsorption-type charging head 6 can also be replaced by other charging heads, such as a DC power socket with waterproof effect. There is no special restriction in this embodiment.

[0060] Specifically, Figure 5 and Fig. 9 As shown, the annular protrusion 5a of the positive electrode cover plate 5 has a conductive portion 5b extending along its axial direction, the plastic cap 4 is provided with a first avoidance hole 4e for the conductive portion 5b to pass through, and the circuit protection board 3 is provided with a contact piece 33 corresponding to the conductive portion 5b. Therefore, during assembly, the positive electrode cover plate 5 is first clamped on the plastic cap 4, and then the plastic cap 4 and the circuit protection board 3 are clamped together so that the conductive portion 5b is in contact with the contact piece 33, so that the positive electrode cover plate 5 and the circuit protection board 3 can be electrically connected, eliminating the trouble of welding wires between the positive electrode cover plate 5 and the circuit protection board 3, and improving the convenience of battery assembly.

[0061] The conductive part 5b can be increased according to actual needs to increase the stability of the electrical connection between the positive electrode cover plate 5 and the circuit protection board 3. For example, in this embodiment, two conductive parts 5b are provided, and the two conductive parts 5b are distributed on the outer peripheral edge of the annular protrusion 5a. When the plastic cap 4 and the circuit protection board 3 are clamped together, the two conductive parts 5b can contact with the corresponding contact pieces 33 to form an electrical connection.

[0062] As a further example, Figure 5 As shown, in this embodiment, the end of the conductive portion 5b has an arc-shaped bending portion 5c, and when the arc-shaped bending portion 5c contacts the contact sheet 33, it is squeezed by the contact sheet 33 and deformed along the bending arc. When the arc-shaped bending portion 5c is deformed, a bending stress can be generated to act on the contact sheet 33, thereby ensuring that the conductive portion 5b and the contact sheet 33 can always maintain good contact, thereby improving the stability of the electrical connection between the positive electrode cover plate 5 and the circuit protection board 3.

[0063] Further, if Fig.10 As shown, in this embodiment, the outer side surface of the conductive portion 5b is arranged in close contact with the inner side surface of the peripheral wall of the plastic cap 4, and the arcuate bent portion 5c protrudes from the peripheral wall of the plastic cap 4. Thus, when the arcuate bent portion 5c is pressed by the hand contact sheet 33, the conductive portion 5b is prevented from bending and deforming, thereby affecting the contact between the arcuate bent portion 5c and the contact sheet 33.

[0064] As preferably, Figure 5As shown, the annular protrusion 5a of the positive electrode cover plate 5 has a plurality of deformation portions 5d extending along its axial direction, and the plastic cap 4 is provided with a second avoidance hole 4f for the deformation portion 5d to pass through. When the annular protrusion 5a is clamped in the annular receiving groove 4a, the deformation portion 5d passes through the second avoidance hole 4f, and can be bent and deformed toward the center of the positive electrode cover plate 5 under the action of external force to be tightly buckled on the inner side of the plastic cap 4. In this way, the tightness of the connection and cooperation between the positive electrode cover plate 5 and the plastic cap 4 is improved. Specifically, in this embodiment, the deformation portions 5d are set to 3, and the three deformation portions 5d are evenly distributed in a triangular shape on the edge of the annular protrusion 5a, thereby achieving a tight fit between the positive electrode cover plate 5 and the plastic cap 4.

[0065] Furthermore, if Fig.10 As shown, in this embodiment, a notch 4h corresponding to the deformed portion 5d is provided on the peripheral wall of the plastic cap 4. Thus, an external force is applied from the notch 4h to the deformed portion 5d, so that the deformed portion 5d is bent toward the center of the positive electrode cover plate 5 to tightly buckle the inner side surface of the plastic cap 4.

[0066] Optionally, in this embodiment, the peripheral wall of the plastic cap 4 has a plurality of undercuts 4c extending along its axial direction, and the peripheral side of the circuit protection board 3 has avoidance grooves 3b corresponding to the undercuts 4c. When the battery is assembled, the undercuts 4c pass through the avoidance grooves 3b and are buckled on the back of the circuit protection board 3, and the circuit protection board 3 is buckled on the end of the peripheral wall of the plastic cap 4, so that the circuit protection board 3 and the plastic cap 4 are quickly engaged.

[0067] Moreover, the undercut portion 4c is arranged on the peripheral side of the plastic cap 4 so as to be arranged along the axial direction of the plastic cap 4, so as to realize the axial snap-fitting of the plastic cap 4 and the circuit protection board 3 along the battery, reduce the complexity of the snap-fitting structure between the two, and provide convenience for the two to fit in a narrow space.

[0068] Alternatively, if Figure 2 and Fig.10 As shown, in this embodiment, the outer peripheral edge of the plastic cap 4 has an edge protrusion 4d abutting against the edge of the opening of the shell 1 to better close the opening of the shell 1 and provide a sealing effect between the shell 1 and the plastic cap 4.

[0069] As preferably, Figure 4 As shown, in this embodiment, a third avoidance hole 4g ​​is provided at the buckle position of the plastic cap 4 relative to the undercut portion 4c, so as to facilitate the demoulding of the plastic cap 4 and reduce the difficulty of producing the plastic cap 4.

[0070] Alternatively, if Figure 2 As shown, in this embodiment, the number of the battery cells 2 is set to three, and the three battery cells 2 are arranged in a triangle. By providing multiple battery cells 2, the capacity of the rechargeable battery can be effectively increased.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to be construed as limiting the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A sealed and waterproof rechargeable battery, characterized in that: Including shell, battery cell, circuit protection board, plastic cap, positive electrode cover and adsorption charging head; The battery cell is inserted into the housing, the upper end of the battery cell has a plug pin extending outward from the battery cell body, the circuit protection board is provided with a pin sleeve matching the plug pin, and the battery cell and the circuit protection board are electrically connected through the plug pin and the pin sleeve; The plastic cap is sealed and inserted into the opening of the shell, and the circuit protection board is buckled on the side of the plastic cap close to the battery core and parallel to the plastic cap; an annular receiving groove is provided on the side of the plastic cap away from the battery core, and the edge of the positive electrode cover plate has an annular protrusion, which is clamped in the annular receiving groove and tightly fits with the outer annular groove wall of the annular receiving groove; The plastic cap is provided with a circular receiving groove, the suction-type charging head is sealed and inserted into the circular receiving groove, and is electrically connected to the circuit protection board; The outer peripheral wall of the suction-type charging head is closely fitted with the groove wall of the circular receiving groove to achieve sealing at the charging port position; The peripheral wall of the plastic cap has a plurality of undercuts extending along its axial direction, and the peripheral side of the circuit protection board has avoidance grooves corresponding to the undercuts one by one. When the battery is assembled, the buckle positions of the undercuts pass through the avoidance grooves and are buckled on the back of the circuit protection board, so that the circuit protection board is buckled on the end of the peripheral wall of the plastic cap; The outer peripheral edge of the plastic cap has an edge protrusion that abuts against the edge of the shell opening.

2. The sealed and waterproof recyclable rechargeable battery according to claim 1, characterized in that: The suction-type charging head includes a first conductive pin, a second conductive pin and an insulating sealing sleeve; The insulating sealing sleeve has a hollow cylinder at its center, and the first end of the first conductive needle is coaxially inserted into the hollow cylinder; a conductive ring is sleeved on the outer periphery of the hollow cylinder, and the first end of the second conductive needle vertically passes through the insulating sealing sleeve and is connected to the conductive ring; The circuit protection board is provided with a socket that cooperates with the first conductive pin and the second conductive pin, and the adsorption-type charging head and the circuit protection board are electrically connected by the insertion of the first conductive pin and the second conductive pin into the corresponding socket.

3. The sealed and waterproof recyclable rechargeable battery according to claim 1, characterized in that: The annular protrusion of the positive electrode cover plate has a conductive portion extending along its axial direction, and the circuit protection board is provided with a contact piece corresponding to the conductive portion. The positive electrode cover plate and the circuit protection board are electrically connected through the contact between the conductive portion and the contact piece.

4. The sealed and waterproof recyclable rechargeable battery according to claim 3, characterized in that: The end of the conductive portion has an arc-shaped bending portion, and when the arc-shaped bending portion contacts the contact sheet, it is squeezed by the contact sheet and deformed along the bending arc.

5. The sealed and waterproof recyclable rechargeable battery according to claim 4, characterized in that: The outer side surface of the conductive portion is in contact with the inner side surface of the peripheral wall of the plastic cap, and the arc-shaped bent portion protrudes from the peripheral wall of the plastic cap.

6. The sealed and waterproof recyclable rechargeable battery as claimed in claim 3, characterized in that: The annular protrusion of the positive electrode cover plate has a plurality of deformation portions extending along its axial direction. When the annular protrusion is clamped in the annular receiving groove, the deformation portion is bent and deformed toward the center of the positive electrode cover plate under the action of external force to be tightly buckled on the inner side of the plastic cap.

7. The sealed and waterproof recyclable rechargeable battery according to claim 6, characterized in that: The peripheral wall of the plastic cap is provided with notches corresponding to the deformation parts one by one.

8. The sealed and waterproof recyclable rechargeable battery according to any one of claims 1 to 7, characterized in that: The number of the battery cells is set to three, and the three battery cells are arranged in a triangle shape.

Images