Rechargeable lithium battery

Abstract

The utility model belongs to the technical field of batteries, and provides a rechargeable lithium battery which comprises a shell, a battery cell assembly and a PCB assembly, the battery cell assembly comprises a shell and a battery cell, the center of one end, extending out of the shell, of the battery cell is provided with a positive electrode end and a negative electrode end surrounding the positive electrode end, and the top of the shell is provided with a first opening; the outer surface of the shell is provided with an inwards-sunken clamping groove in the length direction of the shell, the PCB assembly comprises a PCB support, a PCB, a positive electrode connecting part, a negative electrode connecting piece arranged on the periphery of the top of the PCB and a wired charging plug, the positive electrode connecting part abuts against the positive electrode end, and the negative electrode end makes contact with the inner wall of the top of the shell to achieve electric connection; the first opening extends out of the electric connecting sheet and is bent and pressed on the negative electrode connecting sheet so as to realize negative electrode communication; and the wired charging plug is arranged in the clamping groove. In the structure, the Type-C interface is made into an interface with a wire, an electronic product can be directly charged when the Type-C interface is used, the wire of the Type-C interface is accommodated in the clamping groove when the Type-C interface is not used, the use is convenient, and the structure is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a rechargeable lithium battery. Background Art

[0002] As a source of energy, batteries are widely used in all aspects of modern social life because of their stable voltage and current, stable and reliable performance, easy portability, and simple charging and discharging operations.

[0003] With the advancement of technology, the performance requirements for batteries in certain scenarios are getting higher and higher. However, most of the current batteries still use traditional charging methods when charging, which is not applicable in some occasions. Even if there are new batteries to replace them, they are abandoned due to high costs. Therefore, cost-effective transitional rechargeable lithium batteries are urgently needed to replace them.

[0004] In the prior art, the Type-C interface of the lithium battery is directly arranged on the PCB board, and a power cord needs to be connected separately when in use, which is inconvenient to use. This structure cannot directly use the lithium battery to charge electronic products, has many process steps, and the user experience is poor. Utility Model Content

[0005] In view of this, the utility model provides a rechargeable lithium battery for solving the problems of multiple process steps and poor user experience in the prior art.

[0006] To achieve one or part or all of the above purposes or other purposes, the utility model provides a rechargeable lithium battery, comprising a shell, a battery cell assembly arranged in the shell, and a PCB assembly encapsulated in the shell and sleeved on the outer periphery of the battery cell assembly, the battery cell assembly comprising a shell and a battery cell arranged in the shell, the center of one end of the battery cell extending out of the shell having a positive terminal and a negative terminal surrounding the positive terminal, the top of the shell having a first opening, the outer surface of the shell having an inwardly recessed card slot along its length direction, the PCB assembly comprising a PCB board bracket, a PCB board placed on the PCB board bracket, a positive electrode connecting portion arranged at the center of the bottom of the PCB board, a negative electrode connecting sheet arranged at the outer periphery of the top of the PCB board, and a wired charging plug electrically connected to the PCB board, the positive electrode connecting portion abuts against the positive terminal, the negative terminal contacts the inner wall of the top of the shell to achieve electrical connection, an electrical connecting sheet extends out of the first opening and is bent and pressed on the negative electrode connecting sheet to achieve negative electrode connection, and the wired charging plug is placed in the card slot.

[0007] Specifically, the PCB board bracket includes a circular top plate for supporting the PCB board, and two arc-shaped support plates extending downward from the circular top plate to the bottom of the shell for clamping the battery cell, and a first notch for accommodating the card slot is provided between the two arc-shaped support plates. The positive terminal of the battery cell extends from the center of the circular top plate and is electrically connected to the positive electrode connecting part of the PCB board.

[0008] Furthermore, the bottom of the shell has a second opening, the bottom of the second opening is provided with a bottom plate for sealing the second opening, a plurality of fixing plates extend inwardly from the second opening, and the fixing plates are welded and fixed to the bottom plate.

[0009] Furthermore, a plurality of the fixing sheets are located on the inner side of the bottom sheet, wherein some of the fixing sheets are bent and pressed on the bottom of the battery core, and some of the fixing sheets are bent and pressed on the bottom of the two arc-shaped support plates.

[0010] Specifically, the length of the wired charging plug is shorter than the length of the card slot.

[0011] Specifically, the wired charging plug is a Type-C charging plug.

[0012] Specifically, the electrical connecting pieces are multiple and evenly distributed at the first opening of the shell. The PCB board is provided with accommodating notches corresponding to the electrical connecting pieces. The electrical connecting pieces extend into the accommodating notches and are bent inwards and pressed onto the PCB board.

[0013] Specifically, the positive electrode connection part is a spring or an elastic steel column, one end of the positive electrode connection part is welded to the bottom of the PCB board, and the other end of the positive electrode connection part is pressed against the positive end of the battery cell.

[0014] Specifically, a bottom sheet is stacked on the bottom of the housing, a second notch is provided on the bottom sheet, and the second notch corresponds to the card slot.

[0015] Specifically, a positive lead-out terminal is also provided at the top of the PCB board, and insulating paper and a surface pad are stacked on the PCB board, and the positive lead-out terminal passes through the insulating paper and the surface pad.

[0016] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0017] The utility model proposes a rechargeable lithium battery, in which the Type-C interface on the lithium battery PCB is made into an interface with a wire, and a card slot is made on the outer surface of the shell for storing the wire of the Type-C interface. In this structure, the Type-C interface is made into an interface with a wire, and electronic products can be directly charged when in use. When not in use, the wire of the Type-C interface is stored in the card slot, which is convenient to use and simple in structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] in:

[0020] Figure 1 An exploded view of a rechargeable lithium battery in an embodiment of the utility model;

[0021] Figure 2 The structure of the rechargeable lithium battery in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 3 The structure of the rechargeable lithium battery in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0023] Reference numerals:

[0024] 1-lithium battery; 10-housing; 101-first opening; 102-card slot; 103-electrical connection plate; 104-second opening; 105-fixing plate; 20-cell assembly; 201-housing; 202-cell; 203-positive terminal; 204-negative terminal; 30-PCB board bracket; 301-round top plate; 302-arc-shaped support plate; 303-first notch; 40-PCB board; 401-negative electrode connection plate; 402-wired charging plug; 403-positive electrode lead-out terminal; 50-insulating paper; 60-face pad; 70-bottom film; 701-second notch. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] Reference Figure 1-3 The utility model provides a rechargeable lithium battery 1, including a shell 10, a battery cell assembly 20 arranged in the shell 10, and a PCB assembly 30 encapsulated in the shell 10 and sleeved on the outer periphery of the battery cell assembly 20, the battery cell assembly 20 includes a shell 201, and a battery cell 202 arranged in the shell 201, the battery cell 202 has a positive terminal 203 at the center of one end extending out of the shell 201, and a negative terminal 204 surrounding the positive terminal 203, the top of the shell 10 has a first opening 101, and the outer surface of the shell 10 is provided with an inwardly recessed card slot 102 along its length direction, the PCB assembly The device comprises a PCB bracket 30, a PCB board 40 placed on the PCB bracket 30, a positive electrode connecting portion (not shown) arranged at the center of the bottom of the PCB board 40, a negative electrode connecting piece 401 arranged at the outer periphery of the top of the PCB board 40, and a wired charging plug 402 electrically connected to the PCB board, wherein the positive electrode connecting portion 401 abuts against the positive terminal 203, the negative terminal 204 contacts the inner wall of the top of the shell 10 to achieve electrical connection, an electrical connecting piece 103 extends out from the first opening 101 and is bent and pressed on the negative electrode connecting piece 401 to achieve negative electrode connection, and the wired charging plug 402 is placed in the card slot 102.

[0029] The utility model proposes a rechargeable lithium battery, in which the Type-C interface on the lithium battery PCB is made into an interface with a wire, and a card slot 102 is made on the outer surface of the shell 10 for storing the wire of the Type-C interface. In this structure, the Type-C interface is made into an interface with a wire, and electronic products can be directly charged when in use. When not in use, the wire of the Type-C interface is stored in the card slot 102, which is convenient to use and simple in structure.

[0030] Specifically, the PCB board bracket 30 includes a circular top plate 301 for supporting the PCB board, and two arc-shaped support plates 302 extending downward from the circular top plate 301 to the bottom of the shell 10 for clamping the battery cell, and a first notch 303 for accommodating the card slot 102 is provided between the two arc-shaped support plates 302, and the positive terminal 203 of the battery cell 202 extends from the center of the circular top plate 301 and is electrically connected to the positive electrode connecting part of the PCB board 40.

[0031] In some embodiments, the bottom of the outer shell 10 has a second opening 104, and the bottom of the second opening 104 is provided with a bottom film 70 for sealing the second opening 104. A plurality of fixing plates 105 extend inward from the second opening 104, and the plurality of fixing plates 105 are welded and fixed to the bottom film 70. The bottom of the outer shell 10 is open for easy replacement of the battery cell.

[0032] Furthermore, a plurality of fixing plates 105 are located on the inner side of the bottom plate 70, wherein some of the fixing plates 105 are bent and pressed on the bottom of the battery cell 202, and some of the fixing plates 105 are bent and pressed on the bottom of the two arc-shaped support plates 302. The fixing plates 105 are used to fix the battery cell 202 and the PCB board bracket 30 so that the battery cell 202 and the PCB board bracket 30 do not move in the housing 10.

[0033] Specifically, the length of the wired charging plug 402 is shorter than the length of the card slot 102 , so that the wired charging plug 402 can be completely received in the card slot 102 .

[0034] Specifically, the wired charging plug 402 is a Type-C charging plug, which is more versatile and more convenient to charge. Of course, the wired charging plug 402 can also be other types of charging plugs.

[0035] Specifically, there are multiple electrical connection sheets 103, which are evenly distributed at the first opening 101 of the outer shell 10. The PCB board 40 is provided with accommodating notches (not shown) corresponding to each electrical connection sheet 103. Each electrical connection sheet 103 extends into each accommodating notch and is bent inward and pressed onto the PCB board 40. The method of achieving negative pole connection by bending and pressing the electrical connection sheet 103 onto the PCB board 40 is more stable.

[0036] Specifically, the positive electrode connection part is a spring or an elastic steel column, one end of the positive electrode connection part is welded to the bottom of the PCB board 40, and the other end of the positive electrode connection part is pressed against the positive terminal 203 of the battery cell 202. The use of a spring or an elastic steel column is convenient for welding on the one hand, and on the other hand, the elasticity of the spring or the elastic steel column is used to ensure reliable electrical connection of the positive electrode.

[0037] Specifically, a bottom sheet 70 is stacked at the bottom of the housing 10 , and a second notch 701 is provided on the bottom sheet 70 . The second notch 701 corresponds to the card slot 102 . The bottom sheet isolates the inside of the housing 10 from the outside, thereby protecting the battery cell 202 .

[0038] Specifically, a positive lead-out terminal 403 is also provided at the top of the PCB board 40, and insulating paper 50 and a surface pad 60 are stacked on the PCB board 40. The positive lead-out terminal 403 passes through the insulating paper 50 and the surface pad 60. The surface pad 60 is made of flame-retardant material, providing further protection for the safety performance of the battery.

[0039] In summary, the rechargeable lithium battery of the utility model can directly charge electronic products. When not in use, the cable of the Type-C interface is stored in the card slot. It is easy to use and has a simple structure. The bottom of the shell is open. When replacing the battery cell, the old battery cell can be directly taken out from the bottom and the new battery cell can be put in from the bottom. The operation is simple and the user experience is high.

[0040] The embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A rechargeable lithium battery, comprising a housing, a battery cell assembly disposed in the housing, and a PCB assembly encapsulated in the housing and sleeved on the outer periphery of the battery cell assembly, wherein the battery cell assembly comprises a housing, and a battery cell disposed in the housing, wherein the battery cell has a positive terminal at the center of one end extending out of the housing, and a negative terminal surrounding the positive terminal, wherein: The top of the shell has a first opening, and the outer surface of the shell is provided with an inwardly recessed card slot along its length direction. The PCB assembly includes a PCB board bracket, a PCB board placed on the PCB board bracket, a positive electrode connecting portion arranged at the center of the bottom of the PCB board, a negative electrode connecting piece arranged at the outer periphery of the top of the PCB board, and a wired charging plug electrically connected to the PCB board, the positive electrode connecting portion abuts against the positive terminal, the negative terminal contacts the inner wall of the top of the shell to achieve electrical connection, an electrical connecting piece extends out of the first opening and is bent and pressed on the negative electrode connecting piece to achieve negative electrode connection, and the wired charging plug is placed in the card slot.

2. A rechargeable lithium battery according to claim 1, characterized in that: The PCB board bracket includes a circular top plate for supporting the PCB board, and two arc-shaped support plates extending downward from the circular top plate to the bottom of the shell for clamping the battery cell, and a first notch for accommodating the card slot is provided between the two arc-shaped support plates. The positive terminal of the battery cell extends from the center of the circular top plate and is electrically connected to the positive electrode connecting part of the PCB board.

3. A rechargeable lithium battery according to claim 2, characterized in that: The bottom of the shell is provided with a second opening, the bottom of the second opening is provided with a bottom plate for sealing the second opening, a plurality of fixing plates extend inwardly from the second opening, and the fixing plates are fixed to the bottom plate by welding.

4. A rechargeable lithium battery according to claim 3, characterized in that: A plurality of the fixing sheets are located on the inner side of the bottom sheet, wherein some of the fixing sheets are bent and pressed on the bottom of the battery core, and some of the fixing sheets are bent and pressed on the bottom of the two arc-shaped support plates.

5. A rechargeable lithium battery according to claim 1, characterized in that: The length of the wired charging plug is shorter than the length of the card slot.

6. A rechargeable lithium battery according to claim 1, characterized in that: The wired charging plug is a Type-C charging plug.

7. A rechargeable lithium battery according to claim 1, characterized in that: The electrical connection sheets are multiple and evenly distributed at the first opening of the housing. The PCB board is provided with accommodating notches corresponding to the electrical connection sheets. The electrical connection sheets extend into the accommodating notches and are bent inwards and pressed onto the PCB board.

8. A rechargeable lithium battery according to claim 1, characterized in that: The positive electrode connection part is a spring or an elastic steel column, one end of the positive electrode connection part is welded to the bottom of the PCB board, and the other end of the positive electrode connection part is pressed against the positive end of the battery cell.

9. A rechargeable lithium battery according to claim 3, characterized in that: A bottom sheet is stacked on the bottom of the housing, and a second notch is arranged on the bottom sheet, and the second notch corresponds to the card slot.

10. A rechargeable lithium battery according to claim 1, characterized in that: A positive lead-out terminal is also provided at the top of the PCB board, and insulating paper and a surface pad are stacked on the PCB board, and the positive lead-out terminal passes through the insulating paper and the surface pad.

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