1.5 V lithium battery with TYPE-C charging port

Abstract

The utility model relates to a 1.5 V lithium battery with a TYPE-C charging port, the 1.5 V lithium battery comprises a PCB, a positive electrode cap, a positive and negative electrode isolation sheet, a plastic shell, a winding cell assembly, an insulating sheath and a metal shell, the plastic shell comprises a plastic upper shell and a plastic lower shell which are buckled with each other, the PCB is vertically arranged between the plastic upper shell and the plastic lower shell, a rolling groove is formed in the side surface of the upper part of the metal shell, and the rolling groove is formed in the side surface of the lower part of the metal shell. The upper end of the PCB is provided with a positive electrode contact spring, the lower end of the PCB is provided with a positive electrode adapter sheet, and the middle part of the PCB is provided with a TYPE-C charging port and a common negative electrode elastic sheet which are vertically arranged. According to the invention, the TYPE-C charging port is vertically arranged and can be easily placed into a metal shell; besides, the rolling groove and the spinning edge are arranged on the metal shell and used for fixing the winding battery cell assembly and the plastic shell, the metal shell is an integral body and is good in strength, the fixing effect on the winding battery cell assembly and the plastic shell is good, and the machining difficulty and cost of the rolling groove and the spinning edge are low.

Description

Technical Field

[0001] The present application relates to the field of lithium battery technology, and in particular to a 1.5V lithium battery with a TYPE-C charging port. Background Art

[0002] A Chinese patent application with publication number CN216624417U and titled "A 1.5V Constant Voltage Lithium Battery" discloses a low-voltage lithium battery that can constantly output a voltage of 1.5V. The battery is sized like a No. 5 battery and a No. 7 battery, and can be directly used in various devices such as remote controls and electric toys to replace existing disposable batteries.

[0003] This application sets a horizontally arranged TYPE-C charging port on the upper part of the lithium battery. The width of the TYPE-C charging port is 8.3mm. The diameter of the No. 5 battery is 14mm. The TYPE-C charging port can be inserted horizontally, but the diameter of the No. 7 battery is only 10mm. The TYPE-C charging port is difficult to insert horizontally. The width of the charging port opened on the metal shell is also too large, resulting in insufficient structural strength of the metal shell above the charging port. The structure of the prior art is not of reference value and needs to be improved. Utility Model Content

[0004] In order to solve the technical problem that the existing No. 7 lithium battery is difficult to be placed in a TYPE-C charging port, the utility model provides a 1.5V lithium battery with a TYPE-C charging port.

[0005] The technical solution provided by the present application is as follows: a 1.5V lithium battery with a TYPE-C charging port, comprising a PCB board, a positive electrode cap, a positive and negative electrode separator, a plastic shell, a wound battery cell assembly, an insulating outer skin and a metal shell, wherein the plastic shell comprises a plastic upper shell and a plastic lower shell that are buckled with each other, the PCB board is vertically arranged between the plastic upper shell and the plastic lower shell, a rolling groove is provided on the upper side of the metal shell, and a spinning edge is provided on the top, the wound battery cell assembly is limited by the rolling groove to the bottom of the inner side of the metal shell, and the plastic shell is limited between the rolling groove and the spinning edge; the upper end of the PCB board is provided with a A positive contact spring is provided, a positive electrode adapter is provided at the lower end, a vertically arranged TYPE-C charging port and a common negative electrode spring are provided in the middle, the positive electrode cap is provided on the plastic upper shell, the positive electrode contact spring passes upward through the plastic upper shell and elastically contacts with the inner wall of the positive electrode cap, the common negative electrode spring elastically contacts with the inner wall of the metal shell, the positive electrode ear of the wound battery cell assembly is welded to the positive electrode adapter, the negative electrode ear is welded to the bottom inner wall of the metal shell, the positive and negative electrode isolation sheets are provided between the spun edge and the positive electrode cap, and a charging hole is provided at the same position of the insulating skin and the metal shell.

[0006] By adopting the above technical solution, the present application sets a plastic shell, and the PCB board can be vertically set in the plastic shell. The TYPE-C charging port on the PCB board is also arranged vertically, so that the TYPE-C charging port can be easily placed in the metal shell, and the width of the charging hole on the metal shell only needs to be 2.5mm, which will not seriously affect the strength of the structure above the charging hole; in addition, the present application sets a rolling groove and a spinning edge on the metal shell, and limits the wound battery cell assembly to the bottom of the inner side of the metal shell, and limits the plastic shell between the rolling groove and the spinning edge. The metal shell is a whole with good strength, and the fixing effect of the wound battery cell assembly and the plastic shell is also good. The processing difficulty and cost of the rolling groove and the spinning edge are relatively low. Setting the PCB board in the plastic shell can protect the PCB board and prevent the PCB board from being compressed when processing the spinning edge. It can also be isolated from the metal shell and will not short-circuit.

[0007] Preferably, a sealing ring is also sleeved on the lower end of the plastic lower shell to achieve sealing between the rolling groove and the plastic lower shell.

[0008] Preferably, a slot is provided on the side of the plastic upper shell, a buckle hole is provided on the side wall of the slot, an insert is provided on the plastic lower shell, a buckle is provided on the inner side of the insert, and after the plastic upper shell and the plastic lower shell are docked, the insert is inserted into the slot and the buckle is embedded in the buckle hole.

[0009] Preferably, the side wall of the plastic upper shell is further provided with a first avoidance hole and a second avoidance hole, which are used to expose the TYPE-C charging port and the common negative electrode spring respectively.

[0010] Preferably, a fixing hole is provided at the top of the plastic upper shell, and a fixing sheet is provided at a corresponding position at the lower end of the positive electrode cap. The fixing sheet is bent 90 degrees after passing through the fixing hole, thereby fixing the positive electrode cap on the plastic upper shell.

[0011] Preferably, a through hole is provided in the middle of the bottom wall of the plastic lower shell, and the positive electrode adapter plate passes downward through the through hole and is connected to the positive electrode ear by spot welding after being bent. A potting glue is provided at the through hole to form a seal to isolate the electrolyte.

[0012] Preferably, the wound battery cell assembly includes a wound battery cell, an upper isolation sheet and a lower isolation sheet, the positive electrode tab passes through the central hole of the upper isolation sheet, and the end is welded to the lower surface of the positive electrode adapter plate; the negative electrode tab is wound from the side of the wound battery cell to the bottom surface, and the end is welded to the bottom wall of the metal shell.

[0013] Preferably, a charging indicator light is also provided on the PCB board, a light-transmitting hole is provided at the same position of the insulating outer skin and the metal shell, and the plastic upper shell and the plastic lower shell are both made of transparent material.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. This application sets the PCB board vertically in the plastic shell, and the TYPE-C charging port on the PCB board is also arranged vertically, so that the TYPE-C charging port can be easily placed in the metal shell;

[0016] 2. The width of the charging hole on the metal shell only needs to be 2.5mm, which will not seriously affect the strength of the structure above the charging hole;

[0017] 3. The present application provides rolling grooves and spun edges on the metal shell, confines the wound battery cell assembly to the inner bottom of the metal shell, and confines the plastic shell between the rolling grooves and the spun edges. The metal shell is an integral whole with good strength and good fixing effect on the wound battery cell assembly and the plastic shell. The processing difficulty and cost of the rolling grooves and spun edges are relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional diagram of the lithium battery described in the embodiment of the present application;

[0019] Figure 2 is a schematic diagram of a half-section structure of a lithium battery according to an embodiment of the present application;

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 is a schematic diagram of a half-section structure of the lithium battery described in the embodiment of the present application from another angle;

[0022] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 yes Figure 4 Enlarged view of point C in the middle;

[0024] Figure 7 is a schematic diagram of the exploded structure of the lithium battery described in the embodiment of the present application;

[0025] Figure 8 It is a schematic diagram of the exploded structure of the PCB board and the plastic shell described in the embodiment of the present application;

[0026] Fig. 9 It is a schematic diagram of the exploded structure of the PCB board and the plastic shell from another angle according to the embodiment of the present application;

[0027] Fig.10 A three-dimensional diagram of the wound battery cell assembly described in an embodiment of the present application.

[0028] Description of reference numerals: 1. PCB board; 11. Positive contact spring; 12. Positive adapter; 13. TYPE-C charging port; 14. Common negative spring; 15. Charging indicator light; 2. Positive cap; 21. Fixing plate; 3. Positive and negative separators; 4. Plastic shell; 41. Plastic upper shell; 411. Slot; 412. Buckle hole; 413. First avoidance hole; 414. Second avoidance hole; 415. Fixing hole; 42. Plastic lower shell; 421. Insert; 422. Buckle; 423. Through hole; 5. Wound battery cell assembly; 51. Positive electrode ear; 52. Negative electrode ear; 53. Wound battery cell; 54. Upper separator; 55. Lower separator; 6. Insulating outer skin; 61. Charging hole; 62. Light-transmitting hole; 7. Metal shell; 71. Rolling groove; 72. Spinning edge; 73. Charging hole; 74. Light-transmitting hole; 8. Sealing ring; 9. Potting glue. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-10 This application is described in further detail.

[0030] Reference Figures 1 to 6 The embodiment of the present application discloses a 1.5V lithium battery with a TYPE-C charging port, including a PCB board 1, a positive electrode cap 2, a positive and negative electrode separator 3, a plastic shell 4, a wound battery core assembly 5, an insulating outer skin 6 and a metal shell 7, wherein the plastic shell 4 includes a plastic upper shell 41 and a plastic lower shell 42 that are buckled together, the PCB board 1 is vertically arranged between the plastic upper shell 41 and the plastic lower shell 42, the upper side of the metal shell 7 is provided with a rolling groove 71, and the top is provided with a spinning edge 72, the wound battery core assembly 5 is limited to the inner bottom of the metal shell 7 by the rolling groove 71, and the plastic shell 4 is limited between the rolling groove 71 and the spinning edge 72; the upper end of the PCB board 1 is provided with a positive electrode contact A contact spring 11 is provided with a positive electrode adapter plate 12 at the lower end, a vertically arranged TYPE-C charging port 13 and a common negative electrode spring 14 are provided in the middle, the positive electrode cap 2 is arranged on the plastic upper shell 41, the positive electrode contact spring 11 passes upward through the plastic upper shell 41 and elastically contacts the inner wall of the positive electrode cap 2, the common negative electrode spring 14 elastically contacts the inner wall of the metal shell 7, the positive electrode ear 51 of the wound battery cell assembly 5 is welded to the positive electrode adapter plate 12, the negative electrode ear 52 is welded to the bottom inner wall of the metal shell 7, the positive and negative electrode isolation sheets 3 are arranged between the spinning edge 72 and the positive electrode cap 2, and charging holes 61 and 73 are provided at the same position of the insulating outer skin 6 and the metal shell 7.

[0031] The PCB board 1 described in the present application is integrated with a step-down circuit, a charging and discharging circuit, and a protection circuit. The existing necessary circuits can be used, and the circuit principle does not need to be improved too much. The positive and negative electrode separators 3 are mainly used to prevent short circuits between the metal shell 7 and the positive electrode cap 2, and the plastic shell 4 has the effect of isolating the PCB board 1 from the metal shell 7.

[0032] Reference Figure 3 The lower end of the plastic lower shell 42 is also provided with a sealing ring 8 for achieving sealing between the rolling groove 71 and the plastic lower shell 42. During the process of forming the spinning edge 72, the plastic shell 4 will be squeezed downward, and the sealing ring 8 will be squeezed and deformed, thereby achieving a high degree of sealing and effectively preventing electrolyte leakage.

[0033] Reference Figure 5 , Figure 8 and Fig. 9 , the side of the plastic upper shell 41 is provided with a slot 411, the side wall of the slot 411 is provided with a buckle hole 412, the plastic lower shell 42 is provided with an insert 421, and the inner side of the insert 421 is provided with a buckle 422. After the plastic upper shell 41 and the plastic lower shell 42 are docked, the insert 421 is inserted into the slot 411, and the buckle 422 is embedded in the buckle hole 412, so that the plastic upper shell 41 and the plastic lower shell 42 are buckled and fixed as a whole. The side wall of the plastic upper shell 41 is also provided with a first avoidance hole 413 and a second avoidance hole 414, which are used to expose the TYPE-C charging port 13 and the common negative electrode spring 14 respectively. The top of the plastic upper shell 41 is provided with a fixing hole 415, and the corresponding position of the lower end of the positive electrode cap 2 is provided with a fixing plate 21. The fixing plate 21 passes through the fixing hole 415 and is bent 90 degrees, thereby fixing the positive electrode cap 2 on the plastic upper shell 41. A through hole 423 is provided in the middle of the bottom wall of the plastic lower shell 42, and the positive electrode adapter 12 passes downward through the through hole 423, and is connected to the positive electrode tab 51 by spot welding after being bent. A potting glue 9 is provided at the through hole 423 to form a seal to isolate the electrolyte and prevent the electrolyte from penetrating from the through hole 423 and contacting the PCB board 1. At the same time, the thickness of the potting glue 9 is controlled, and it can also be used as a pressure relief hole. The present application realizes the electrical connection between the positive electrode tab 51 and the PCB board 1 by welding, and the connection is more reliable.

[0034] Reference Fig.10 The wound battery cell assembly 5 includes a wound battery cell 53, an upper separator 54 and a lower separator 55. The positive electrode ear 51 passes through the central hole of the upper separator 54, and the end is welded to the lower surface of the positive electrode adapter 12; the negative electrode ear 52 is wound from the side of the wound battery cell 53 to the bottom surface, and the end is welded to the bottom wall of the metal shell 7. The present application directly puts the wound battery cell 53 into the metal shell 7, which has one less layer of wrapping shell than the soft-pack lithium battery cell or hard-shell lithium battery cell in the prior art, and has lower cost. By setting the rolling groove 71 and the sealing ring 8, the wound battery cell assembly 5 is sealed, and it is not easy to leak the electrolyte; the spinning edge 72 at the upper end presses and seals the plastic shell 4 to achieve an integrated seal.

[0035] Reference Figure 7The PCB board 1 is also provided with a charging indicator light 15, the insulating outer skin 6 and the metal shell 7 are provided with light-transmitting holes 62 and 74 at the same position, and the plastic upper shell 41 and the plastic lower shell 42 are both made of transparent materials, which can directly transmit light. It plays an indicating role when charging.

[0036] The implementation principle of the present application is as follows: the present application sets a plastic shell 4, which can vertically set the PCB board 1 in the plastic shell 4, and the TYPE-C charging port 13 on the PCB board 1 is also arranged vertically, so that the TYPE-C charging port 13 can be easily placed in the metal shell 7, and the width of the charging hole 73 on the metal shell 7 only needs to be 2.5 mm, which will not seriously affect the strength of the structure above the charging hole 73; in addition, the present application sets a rolling groove 71 and a spinning edge 72 on the metal shell 7, and limits the wound battery cell assembly 5 to the inner bottom of the metal shell 7, and limits the plastic shell 4 between the rolling groove 71 and the spinning edge 72. The metal shell 7 is a whole, has good strength, and has a good fixing effect on the wound battery cell assembly 5 and the plastic shell 4. The processing difficulty and cost of the rolling groove 71 and the spinning edge 72 are relatively low. The PCB board 1 is arranged in the plastic shell 4, which can protect the PCB board 1 and prevent the PCB board 1 from being pressed when processing the spinning edge 72, and can also be isolated from the metal shell 7 to prevent short circuit.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A 1.5V lithium battery with a TYPE-C charging port, characterized in that: The invention comprises a PCB board (1), a positive electrode cap (2), a positive and negative electrode separator (3), a plastic shell (4), a wound cell assembly (5), an insulating outer skin (6) and a metal shell (7); the plastic shell (4) comprises a plastic upper shell (41) and a plastic lower shell (42) which are buckled together; the PCB board (1) is vertically arranged between the plastic upper shell (41) and the plastic lower shell (42); a rolling groove (71) is arranged on the upper side of the metal shell (7) and a spinning edge (72) is arranged on the top; the wound cell assembly (5) is limited by the rolling groove (71) to the bottom of the inner side of the metal shell (7); the plastic shell (4) is limited between the rolling groove (71) and the spinning edge (72); a positive electrode contact spring (11) is arranged on the upper end of the PCB board (1) and a positive electrode contact spring (11) is arranged on the lower end A positive electrode adapter (12) is provided, a vertically arranged TYPE-C charging port (13) and a common negative electrode spring (14) are provided in the middle, the positive electrode cap (2) is arranged on the plastic upper shell (41), the positive electrode contact spring (11) passes through the plastic upper shell (41) upward and elastically contacts the inner wall of the positive electrode cap (2), the common negative electrode spring (14) elastically contacts the inner wall of the metal shell (7), the positive electrode ear (51) of the wound battery cell assembly (5) is welded to the positive electrode adapter (12), the negative electrode ear (52) is welded to the bottom inner wall of the metal shell (7), the positive and negative electrode separators (3) are arranged between the spinning edge (72) and the positive electrode cap (2), and the insulating outer skin (6) and the metal shell (7) are provided with charging holes at the same position.

2. The 1.5V lithium battery with a TYPE-C charging port according to claim 1, characterized in that: The lower end of the plastic lower shell (42) is also sleeved with a sealing ring (8), which is used to achieve sealing between the rolling groove (71) and the plastic lower shell (42) after being squeezed.

3. The 1.5V lithium battery with a TYPE-C charging port according to claim 1, characterized in that: The side of the plastic upper shell (41) is provided with a slot (411), the side wall of the slot (411) is provided with a buckle hole (412), the plastic lower shell (42) is provided with an insert (421), the inner side of the insert (421) is provided with a buckle (422), after the plastic upper shell (41) and the plastic lower shell (42) are butt-jointed, the insert (421) is inserted into the slot (411), and the buckle (422) is embedded in the buckle hole (412).

4. The 1.5V lithium battery with a TYPE-C charging port according to claim 3, characterized in that: The side wall of the plastic upper shell (41) is also provided with a first avoidance hole (413) and a second avoidance hole (414), which are used to expose the TYPE-C charging port (13) and the common negative electrode spring (14), respectively.

5. The 1.5V lithium battery with a TYPE-C charging port according to claim 3, characterized in that: The top of the plastic upper shell (41) is provided with a fixing hole (415), and the corresponding position of the lower end of the positive electrode cap (2) is provided with a fixing sheet (21). The fixing sheet (21) passes through the fixing hole (415) and is bent 90 degrees, thereby fixing the positive electrode cap (2) on the plastic upper shell (41).

6. The 1.5V lithium battery with a TYPE-C charging port according to claim 3, characterized in that: A through hole (423) is provided in the middle of the bottom wall of the plastic lower shell (42), and the positive electrode adapter (12) passes downward through the through hole (423), is bent, and is connected to the positive electrode ear (51) by spot welding. A potting glue (9) is provided at the through hole (423) to form a seal to isolate the electrolyte.

7. The 1.5V lithium battery with a TYPE-C charging port according to claim 1, characterized in that: The wound battery cell assembly (5) comprises a wound battery cell (53), an upper isolation sheet (54) and a lower isolation sheet (55); the positive electrode tab (51) extends through a central hole of the upper isolation sheet (54) and an end portion is welded to the lower surface of the positive electrode adapter sheet (12); the negative electrode tab (52) is wound from the side of the wound battery cell (53) to the bottom surface and an end portion is welded to the bottom wall of the metal shell (7).

8. The 1.5V lithium battery with a TYPE-C charging port according to claim 1, characterized in that: The PCB board (1) is also provided with a charging indicator light (15), the insulating outer skin (6) and the metal shell (7) are provided with a light-transmitting hole at the same position, and the plastic upper shell (41) and the plastic lower shell (42) are both made of transparent material.

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