Lithium battery

Abstract

The lithium battery comprises a shell, an electrode assembly and a PCB (Printed Circuit Board), the shell is cylindrical, one end of the shell is sealed, and the other end of the shell is provided with a shell opening; the electrode assembly is arranged in the shell and is provided with a positive electrode pin and a negative electrode pin, and the free ends of the positive electrode pin and the negative electrode pin extend towards the shell opening; the PCB is arranged at the shell opening and provided with a first electrode, a second electrode and two pin holes, the two pin holes contain the free end of the positive electrode pin and the free end of the negative electrode pin respectively, and a first welding spot used for electric connection is arranged between one of the first electrode and the second electrode and the free end of the positive electrode pin. A second welding spot is arranged between the other one of the first electrode and the second electrode and the free end of the negative electrode pin, a first groove is formed in the side, away from the electrode assembly, of the PCB, the two pin holes are formed in the bottom wall of the first groove, and the first welding spot and the second welding spot are contained in the first groove. According to the lithium battery disclosed by the utility model, the welding space of the guide pin on the PCB can be increased, and the welding operation is convenient.

Description

Technical Field

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

[0002] Cylindrical lithium batteries have the characteristics of small size, stable voltage, wide operating temperature range, and long storage life. They are widely used in various products such as energy storage cells, digital products, home appliances, electronic cigarette batteries, and electronic toys.

[0003] In the related art, a lithium battery is provided with a PCB board as an electrode transfer structure. The PCB board is provided with a lead pin hole for accommodating the lead pin to pass through. A conductive film is attached to the inner wall of the lead pin hole, and the free end of the lead pin is welded to the conductive film in the lead pin hole.

[0004] However, the welding space of the lead pins of the existing lithium battery is small when welding in the lead pin holes, which is inconvenient for welding operation. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a lithium battery, which can increase the welding space of the lead pin on the PCB board and facilitate the welding operation.

[0006] A lithium battery according to an embodiment of the first aspect of the utility model comprises: a shell, which is cylindrical, sealed at one end and has a shell opening at the other end; an electrode assembly, arranged in the shell, having a positive lead pin and a negative lead pin, the free ends of the positive lead pin and the negative lead pin extending toward the shell opening; a PCB board, arranged at the shell opening, having a first electrode, a second electrode and two lead pin holes, the two lead pin holes respectively accommodating the free ends of the positive lead pin and the negative lead pin, a first welding point for electrical connection is arranged between one of the first electrode and the second electrode and the free end of the positive lead pin, a second welding point is arranged between the other of the first electrode and the second electrode and the free end of the negative lead pin, a first groove is arranged on a side of the PCB board away from the electrode assembly, the lead pin hole is arranged on the bottom wall of the first groove, and the first groove accommodates the first welding point and the second welding point.

[0007] A lithium battery according to an embodiment of the utility model has at least the following beneficial effects:

[0008] 1. The utility model provides a shell which is cylindrical, one end of which is sealed, and the other end of which has a shell opening, so that the components of the lithium battery can be loaded into the shell from the shell opening, and the shell can protect the lithium battery.

[0009] 2. The utility model arranges an electrode assembly in the shell, and the electrode assembly has a positive lead pin and a negative lead pin, and the free ends of the positive lead pin and the negative lead pin extend toward the shell opening, so that the positive lead pin and the negative lead pin can extend through the shell opening to the outside of the shell to supply power to the electrical product.

[0010] 3. The utility model arranges a PCB board at the shell opening, the PCB board has a first electrode, a second electrode and two lead pin holes, the two lead pin holes respectively accommodate the free end of the positive lead pin and the free end of the negative lead pin, a first welding point for electrical connection is arranged between one of the first electrode and the second electrode and the free end of the positive lead pin, and a second welding point is arranged between the other of the first electrode and the second electrode and the free end of the negative lead pin. It can be understood that the first welding point can fix the free end of the positive lead pin on the PCB board and connect the positive lead pin with one of the first electrode and the second electrode, so that the positive lead pin can be abutted and conducted with the positive electrode of the electrical product through one of the first electrode and the second electrode, and the second welding point can fix the free end of the negative lead pin on the PCB board and connect the negative lead pin with the other of the first electrode and the second electrode, so that the negative lead pin can be abutted and conducted with the negative electrode of the electrical product through the other of the first electrode and the second electrode, thereby avoiding the positive lead pin and the negative lead pin from directly abutting with the electrical product, causing the positive lead pin and the negative lead pin to be bent or damaged by force.

[0011] 4. The utility model is provided with a first groove on a side of the PCB board away from the electrode assembly, and the lead pin hole is provided on the bottom wall of the first groove, and the first groove accommodates the first welding point and the second welding point. Thus, on the one hand, the first welding point and the second welding point are provided in the first groove, which can prevent the first welding point and the second welding point from protruding out of the PCB board and affecting the appearance of the lithium battery. On the other hand, the first welding point and the second welding point are provided in the first groove, and the space of the first groove is larger than the space of the lead pin hole, so that the welding space of the positive lead pin and the negative lead pin is larger, and the movable space of the welding gun in the first groove is larger, thereby facilitating the welding operation.

[0012] According to some embodiments of the present invention, the first groove is annular.

[0013] According to some embodiments of the present invention, the first groove is coaxially arranged with the PCB board.

[0014] According to some embodiments of the utility model, the first electrode includes a first contact portion and a first conductive strip, the first contact portion is located on a side of the first groove close to the center of the PCB board, the first conductive strip is used to connect the first solder point or the second solder point, and the first contact portion is used to abut and conduct with an electrical product.

[0015] According to some embodiments of the present invention, the first contact portion is located at the center of the PCB board.

[0016] According to some embodiments of the utility model, the second electrode includes a second contact portion and a second conductive strip, the second contact portion is located on a side of the first groove away from the center of the PCB board, the second conductive strip is used to connect the first solder point or the second solder point, and the second contact portion is used to abut and conduct with an electrical product.

[0017] According to some embodiments of the present invention, the second contact portion is annular.

[0018] According to some embodiments of the present invention, the second contact portion is coaxial with the PCB board.

[0019] According to some embodiments of the utility model, a conductive film is attached to the inner wall of the lead pin hole, and the conductive film is used to abut and conduct the positive lead pin or the negative lead pin. One conductive film is connected to the first electrode, and the other conductive film is connected to the second electrode.

[0020] According to some embodiments of the present invention, a first cover plate is disposed on the top of the first groove, and the first cover plate is used to cover the first welding point and the second welding point.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the structure of a lithium battery according to an embodiment of the utility model;

[0024] Figure 2 for Figure 1 AA cross-sectional view shown;

[0025] Figure 3 for Figure 1 BB cross-sectional view shown;

[0026] Figure 4 for Figure 2 An enlarged view of point C is shown;

[0027] Figure 5 for Figure 2 An enlarged view of point D is shown.

[0028] Figure markings: 100-shell, 110-shell opening, 120-electrode assembly, 130-positive lead pin, 140-negative lead pin, 150-PCB board, 160-first electrode, 170-second electrode, 180-lead pin hole, 190-first welding point, 200-second welding point, 210-first groove, 220-first contact part, 230-first conductive strip, 240-second contact part, 250-second conductive strip, 260-conductive film, 270-first cover plate. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] A lithium battery according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0034] Reference Figure 1 , Figure 2 and Figure 3A lithium battery according to an embodiment of the utility model includes a housing 100 , an electrode assembly 120 and a PCB board 150 .

[0035] The outer shell 100 is cylindrical, one end of the outer shell 100 is sealed, and the other end of the outer shell 100 has a shell opening 110, so that the components of the lithium battery can be loaded into the outer shell 100 through the shell opening 110, and the outer shell 100 can protect the lithium battery.

[0036] For the electrode assembly 120, the electrode assembly 120 is arranged in the outer shell 100, and the electrode assembly 120 has a positive lead needle 130 and a negative lead needle 140. The free end of the positive lead needle 130 and the free end of the negative lead needle 140 extend toward the shell opening 110, so that the positive lead needle 130 and the negative lead needle 140 can extend through the shell opening 110 to the outside of the outer shell 100 to supply power to the electrical products.

[0037] Reference Figure 4 and Figure 5 As for the PCB board 150, the PCB board 150 is set at the shell opening 110, and the PCB board 150 has a first electrode 160, a second electrode 170 and two lead pin holes 180, and the two lead pin holes 180 respectively accommodate the free end of the positive lead pin 130 and the free end of the negative lead pin 140, and a first welding point 190 for electrical connection is set between one of the first electrode 160 and the second electrode 170 and the free end of the positive lead pin 130, and a second welding point 200 is set between the other of the first electrode 160 and the second electrode 170 and the free end of the negative lead pin 140.

[0038] It can be understood that the first welding point 190 can fix the free end of the positive lead pin 130 on the PCB board 150 and connect the positive lead pin 130 with one of the first electrode 160 and the second electrode 170, so that the positive lead pin 130 can be abutted and conducted with the positive electrode of the electrical product through one of the first electrode 160 and the second electrode 170, and the second welding point 200 can fix the free end of the negative lead pin 140 on the PCB board 150 and connect the negative lead pin 140 with the other of the first electrode 160 and the second electrode 170, so that the negative lead pin 140 can be abutted and conducted with the negative electrode of the electrical product through the other of the first electrode 160 and the second electrode 170, thereby avoiding the positive lead pin 130 and the negative lead pin 140 from directly abutting with the electrical product, causing the positive lead pin 130 and the negative lead pin 140 to be bent or damaged by force.

[0039] In some specific embodiments, a first groove 210 is provided on a side of the PCB board 150 away from the electrode assembly 120, and the lead pin hole 180 is provided on the bottom wall of the first groove 210, and the first groove 210 accommodates the first welding point 190 and the second welding point 200. Thus, on the one hand, the first welding point 190 and the second welding point 200 are provided in the first groove 210, which can prevent the first welding point 190 and the second welding point 200 from protruding out of the PCB board 150 and affecting the appearance of the lithium battery. On the other hand, the first welding point 190 and the second welding point 200 are provided in the first groove 210, and the space of the first groove 210 is larger than the space of the lead pin hole 180, so that the welding space of the positive lead pin 130 and the negative lead pin 140 is larger, and the welding gun has a larger movable space in the first groove 210, thereby facilitating the welding operation.

[0040] In some specific embodiments, the first groove 210 is annular, so that the first welding point 190 and the second welding point 200 have sufficient welding space along the length direction of the first groove 210, thereby further facilitating the welding operation.

[0041] Furthermore, the first groove 210 is coaxially arranged with the PCB board 150, so that the first groove 210 extends circumferentially along the axis of the PCB board 150, so that the extension path of the first groove 210 can cover the two lead pin holes 180, and then, the free end of the positive lead pin 130 and the free end of the negative lead pin 140 can extend into the first groove 210 through the two lead pin holes 180 respectively.

[0042] In some specific embodiments, the first electrode 160 includes a first contact portion 220 and a first conductive strip 230. The first contact portion 220 is located on a side of the first groove 210 close to the center of the PCB board 150. The first conductive strip 230 is used to connect the first solder joint 190 or the second solder joint 200. The first contact portion 220 is used to abut and conduct with the electrical product, so that the first contact portion 220 can be away from the first groove 210 to avoid the first contact portion 220 interfering with the welding of the first solder joint 190 or the second solder joint 200.

[0043] Furthermore, the first contact portion 220 is located at the center of the PCB board 150 .

[0044] It can be understood that the first contact portion 220 is located at the center of the PCB board 150, that is, when the lithium battery rotates along the axis of the shell 100 to change the angle, the first contact portion 220 is still located at the center of the PCB board 150, so that after the lithium battery changes its angle, the first contact portion 220 can maintain the unchanged position of abutting and conducting with the electrical product, thereby eliminating the restriction on the installation angle of the lithium battery on the electrical product, and further making the installation of the lithium battery on the electrical product more convenient.

[0045] In some specific embodiments, the second electrode 170 includes a second contact portion 240 and a second conductive strip 250. The second contact portion 240 is located on a side of the first groove 210 away from the center of the PCB board 150. The second conductive strip 250 is used to connect the first solder joint 190 or the second solder joint 200. The second contact portion 240 is used to abut and conduct with the electrical product, so that the second contact portion 240 can be away from the first groove 210 to avoid the second contact portion 240 interfering with the welding of the first solder joint 190 or the second solder joint 200.

[0046] Furthermore, the second contact portion 240 is annular, so that the contact area of ​​the second contact portion 240 is larger, thereby facilitating the electrical product to align and abut against the second contact portion 240 .

[0047] Furthermore, the second contact portion 240 is coaxial with the PCB board 150 .

[0048] It can be understood that the second contact portion 240 is coaxial with the PCB board 150, that is, when the lithium battery rotates along the axis of the shell 100 to change the angle, the covering position of the second contact portion 240 on the PCB board 150 can remain unchanged, so that after the lithium battery changes its angle, the second contact portion 240 can maintain the same position of abutting and conducting with the electrical product, thereby eliminating the restriction on the installation angle of the lithium battery on the electrical product, making the installation of the lithium battery on the electrical product more convenient.

[0049] In some specific embodiments, a conductive film 260 is attached to the inner wall of the lead pin hole 180, and the conductive film 260 is used to abut and conduct the positive lead pin 130 or the negative lead pin 140. One conductive film 260 is connected to the first electrode 160, and the other conductive film 260 is connected to the second electrode 170. Thus, after the positive lead pin 130 and the negative lead pin 140 are inserted into the lead pin hole 180, it is easier to conduct the first electrode 160 and the second electrode 170.

[0050] In some specific embodiments, a first cover plate 270 is provided on the top of the first groove 210, and the first cover plate 270 is used to cover the first welding point 190 and the second welding point 200, thereby preventing the first welding point 190 and the second welding point 200 from being exposed. Furthermore, on the one hand, the appearance of the lithium battery is more beautiful, and on the other hand, the first welding point 190 and the second welding point 200 are not easily damaged or fallen off.

[0051] Furthermore, the first cover plate 270 is provided with a buckle, and the bottom wall of the first groove 210 is provided with a buckle groove, and the buckle and the buckle groove are engaged with each other, thereby making the first cover plate 270 more secure.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A lithium battery, characterized in that: include: The housing (100) is cylindrical, one end of which is sealed, and the other end of which has a housing opening (110); An electrode assembly (120) is arranged in the housing (100) and comprises a positive electrode lead needle (130) and a negative electrode lead needle (140), wherein the free end of the positive electrode lead needle (130) and the free end of the negative electrode lead needle (140) extend toward the housing opening (110); A PCB board (150) is arranged at the shell opening (110), and has a first electrode (160), a second electrode (170) and two lead pin holes (180), wherein the two lead pin holes (180) respectively accommodate the free end of the positive lead pin (130) and the free end of the negative lead pin (140), and a first soldering point (190) for electrical connection is arranged between one of the first electrode (160) and the second electrode (170) and the free end of the positive lead pin (130). A second welding point (200) is arranged between the other of the first electrode (160) and the second electrode (170) and the free end of the negative electrode lead pin (140), a first groove (210) is arranged on a side of the PCB board (150) away from the electrode assembly (120), the two lead pin holes (180) are arranged on the bottom wall of the first groove (210), and the first groove (210) accommodates the first welding point (190) and the second welding point (200).

2. A lithium battery according to claim 1, characterized in that: The first groove (210) is annular.

3. A lithium battery according to claim 2, characterized in that: The first groove (210) is coaxially arranged with the PCB board (150).

4. A lithium battery according to claim 3, characterized in that: The first electrode (160) comprises a first contact portion (220) and a first conductive strip (230); the first contact portion (220) is located on a side of the first groove (210) close to the center of the PCB board (150); the first conductive strip (230) is used to connect the first solder point (190) or the second solder point (200); and the first contact portion (220) is used to abut against and conduct with an electrical product.

5. A lithium battery according to claim 4, characterized in that: The first contact portion (220) is located at the center of the PCB board (150).

6. A lithium battery according to claim 3, characterized in that: The second electrode (170) comprises a second contact portion (240) and a second conductive strip (250); the second contact portion (240) is located on a side of the first groove (210) away from the center of the PCB board (150); the second conductive strip (250) is used to connect the first solder point (190) or the second solder point (200); and the second contact portion (240) is used to abut against and conduct with an electrical product.

7. A lithium battery according to claim 6, characterized in that: The second contact portion (240) is annular.

8. A lithium battery according to claim 7, characterized in that: The second contact portion (240) is coaxial with the PCB board (150).

9. A lithium battery according to claim 1, characterized in that: A conductive film (260) is attached to the inner wall of the lead pin hole (180), and the conductive film (260) is used to abut and conduct the positive electrode lead pin (130) or the negative electrode lead pin (140). One conductive film (260) is connected to the first electrode (160), and the other conductive film (260) is connected to the second electrode (170).

10. A lithium battery according to claim 1, characterized in that: A first cover plate (270) is provided on the top of the first groove (210), and the first cover plate (270) is used to cover the first welding point (190) and the second welding point (200).

Images