Rechargeable lithium battery device

Abstract

The utility model relates to the technical field of lithium battery devices, and provides a rechargeable lithium battery device. The rechargeable lithium battery device comprises a battery cell, the battery cell comprises a conductive shell, a battery cell positive electrode and a battery cell negative electrode, the conductive shell is electrically connected with the battery cell negative electrode, and the conductive shell and the battery cell positive electrode are arranged in an insulated mode; the circuit board is arranged above the positive electrode of the battery cell; the positive conducting strip is connected with the positive electrode of the battery cell and the circuit board; the negative conducting strip is connected with the conducting shell and the circuit board; the insulating bracket is arranged between the positive electrode of the battery cell and the circuit board and is used for fixing the circuit board; the insulating support is located between the positive conducting strip and the negative conducting strip. The circuit board of the rechargeable lithium battery device is connected with the positive electrode of the battery cell and the conductive shell through the positive electrode conductive sheet and the negative electrode conductive sheet respectively, so that a complete charging loop of the circuit board and the battery cell is formed, the structure is simple, the short circuit risk is reduced, and the device stability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery device, and particularly to a rechargeable lithium battery device. BACKGROUND

[0002] The working principle of lithium ion battery (referred to as "lithium battery") is based on the back-and-forth movement of ions between the positive and negative electrodes to realize the charging and discharging process. At present, the lithium battery device on the market is mainly a disposable battery device, which is easy to make but has less energy storage and needs to be replaced frequently, which is not environmentally friendly.

[0003] In the existing rechargeable battery device, the top and bottom of the battery cell are the positive and negative electrodes of the cell, respectively, and the circuit board is placed above the positive electrode of the cell, far from the negative electrode position. Two nickel strips are needed to connect the positive and negative electrodes of the battery cell, making the overall structure complex, not conducive to manufacturing and assembly, and the structural stability is poor. The nickel strip is prone to short circuit caused by poor contact under vibration and high temperature. At the same time, the nickel strip connection method has high requirements for circuit board welding, and is prone to short circuit caused by improper welding.

[0004] Therefore, the existing lithium battery device has the problems of complex structure, not conducive to manufacturing and assembly, and easy to short circuit. CONTENT OF THE INVENTION

[0005] In view of the above problems of the prior art, the present application aims to provide a rechargeable lithium battery device to solve the problems of complex structure, not conducive to manufacturing and assembly, and easy to short circuit of the existing lithium battery device.

[0006] The technical scheme adopted by the present application to solve the technical problems is as follows: a rechargeable lithium battery device is provided, comprising: a battery cell, the battery cell comprising a conductive shell, a positive electrode and a negative electrode, the conductive shell being electrically connected with the negative electrode, and the conductive shell being insulated from the positive electrode; a circuit board, the positive electrode circuit board being arranged at the upper end of the positive electrode of the battery cell; a positive electrode conductive sheet, the positive electrode conductive sheet connecting the positive electrode and the circuit board; a negative electrode conductive sheet, the negative electrode conductive sheet connecting the conductive shell and the circuit board; an insulating support, the insulating support being arranged between the positive electrode and the circuit board, the insulating support being used for fixing the circuit board; and the insulating support being located between the positive electrode conductive sheet and the negative electrode conductive sheet.

[0007] Optionally, the positive electrode conductive sheet comprises a first horizontal section, a first vertical section and a second horizontal section connected in sequence, the first horizontal section being located between the positive electrode and the insulating support, and the second horizontal section being attached to the circuit board.

[0008] Optionally, the insulating support is provided with a connecting through hole corresponding to the first horizontal section, and the first horizontal section is connected to the positive electrode of the battery cell through the connecting through hole.

[0009] Optionally, the negative electrode conductive sheet comprises a second vertical section, a connecting section and a third vertical section connected in sequence, the second vertical section is connected to the conductive shell, and the third vertical section is connected to the circuit board.

[0010] Optionally, the insulating support is provided with a connecting groove corresponding to the third vertical section, and the third vertical section is connected to the circuit board through the connecting groove.

[0011] Optionally, the circuit board comprises a main board, a key and a positive electrode protrusion, the key is located between the main board and the insulating support, the insulating support is provided with an opening corresponding to the key, and the positive electrode protrusion is arranged above the main board, and the positive electrode conductive sheet is connected to the positive electrode protrusion through the main board.

[0012] Optionally, the rechargeable lithium battery device further comprises a device shell, the device shell is sleeved on the outside of the battery cell, and the device shell is provided with a through hole corresponding to the opening.

[0013] Optionally, the rechargeable lithium battery device further comprises an upper cover, the upper cover is located above the circuit board, and the upper cover is provided with a through hole corresponding to the positive electrode protrusion.

[0014] Optionally, the upper cover is provided with a first protrusion, and the insulating support is provided with a first groove corresponding to the first protrusion.

[0015] Optionally, the rechargeable lithium battery device further comprises an insulating ring, the insulating ring is arranged between the positive electrode of the battery cell and the insulating support, the positive electrode conductive sheet is located on the inner side of the insulating ring, and the negative electrode conductive sheet is located on the outer side of the insulating ring.

[0016] Compared with the prior art, the rechargeable lithium battery device comprises a battery cell, a circuit board, a positive electrode conductive sheet, a negative electrode conductive sheet and an insulating support, wherein the conductive shell is electrically connected to the negative electrode of the battery cell, and the conductive shell is insulated from the positive electrode of the battery cell; the circuit board is connected to the positive electrode of the battery cell and the conductive shell through the positive electrode conductive sheet and the negative electrode conductive sheet respectively, so as to form a complete charging circuit of the circuit board and the battery cell, the positive electrode conductive sheet and the negative electrode conductive sheet are simple in structure and easy to assemble, and can be connected by contact, thereby reducing the risk of short circuit; and the insulating support is further arranged to fix the position of the circuit board, prevent the positive electrode conductive sheet and the negative electrode conductive sheet from contacting, improve the stability of the device, and further reduce the risk of short circuit. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a split view of the rechargeable lithium battery device provided in the present application;

[0018] Figure 2 is a schematic view of the rechargeable lithium battery device provided in the present application;

[0019] Figure 3 is a front view and A-A sectional view of the rechargeable lithium battery device provided in the present application;

[0020] Figure 4 is a side view and B-B sectional view of the rechargeable lithium battery device provided in the present application;

[0021] Figure 5 is a schematic view of the battery cell of the rechargeable lithium battery device provided in the present application;

[0022] Figure 6 is a schematic view of the positive conductive sheet of the rechargeable lithium battery device provided in the present application;

[0023] Figure 7 is a schematic view of the negative conductive sheet of the rechargeable lithium battery device provided in the present application;

[0024] Figure 8 is a schematic view of the circuit board of the rechargeable lithium battery device provided in the present application;

[0025] Figure 9 is a schematic view of the upper cover and insulating support of the rechargeable lithium battery device provided in the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, battery cell; 11, positive electrode of the cell; 12, conductive shell; 13, negative electrode of the cell; 2, insulating support; 21, connecting through hole; 22, first groove; 23, opening; 24, connecting groove; 25, second groove; 3, circuit board; 31, key; 32, main board; 33, positive protrusion; 34, first chip; 35, second chip; 4, upper cover; 41, first protrusion; 42, second protrusion; 5, insulating ring; 6, positive conductive sheet; 61, first horizontal section; 62, first vertical section; 63, second horizontal section; 64, second bending section; 65, first bending section; 7, negative conductive sheet; 71, second vertical section; 72, third vertical section; 73, connecting section; 74, fourth bending section; 75, third bending section; 8, device shell. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout the accompanying drawings. The embodiments described below by reference to the accompanying drawings are exemplary only, and are for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0030] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In combination with reference Figure 1 , Figure 2 , Figure 3 And Figure 4 , a rechargeable lithium battery device is provided in the first embodiment of the present application, comprising: a battery cell 1, the battery cell 1 comprises a conductive shell 12, a cell positive electrode 11 and a cell negative electrode 13, the conductive shell 12 is electrically connected with the cell negative electrode 13, and the conductive shell 12 is insulated from the cell positive electrode 11; a circuit board 3, the circuit board 3 is arranged above the cell positive electrode 11; a positive electrode conductive sheet 6, the positive electrode conductive sheet 6 connects the cell positive electrode 11 and the circuit board 3; a negative electrode conductive sheet 7, the negative electrode conductive sheet 7 connects the conductive shell 12 and the circuit board 3; an insulating support 2, the insulating support 2 is arranged between the cell positive electrode 11 and the circuit board 3, and the insulating support 2 is used for fixing the circuit board 3; and the insulating support 2 is located between the positive electrode conductive sheet 6 and the negative electrode conductive sheet 7.

[0032] The internal structure of the existing battery cell 1 of the lithium battery is generally that the negative electrode layer is sleeved on the outside of the positive electrode layer, and the two are separated by a diaphragm. Then, the top protruding part of the battery cell is in conductive communication with the positive electrode layer, serving as the positive electrode 11 of the battery cell. The bottom of the battery cell is in conductive communication with the negative electrode layer, serving as the negative electrode 13 of the battery cell. In order to protect the battery cell, the battery cell 1 is further sleeved with a battery cell shell.

[0033] Specifically, the battery cell 1 of the present application is sleeved with a conductive shell 12 in conductive communication with the negative electrode 13 of the battery cell 1 in the existing structure of the battery cell 1, or the non-conductive shell is replaced with the conductive shell 12 in the existing structure of the battery cell 1. Therefore, the top of the battery cell 1 of the present application is the positive electrode 11 of the battery cell, which is the positive electrode area; the bottom is the negative electrode 13 of the battery cell corresponding to the negative electrode layer inside the battery cell 1, which is the negative electrode area; the conductive shell 12 is in conductive communication with the negative electrode 13 of the battery cell, which is also the negative electrode area. Therefore, the area range of the negative electrode area (the conductive shell 12 and the negative electrode 13 of the battery cell) is increased, and the circuit board 3 is connected to the negative electrode 13 of the battery cell through the conductive shell 12. The conductive shell 12 can be integrally formed with the negative electrode 13 of the battery cell. Specifically, the process of integrally forming the conductive shell 12 of the battery cell 1 with the negative electrode 13 of the battery cell is the existing process.

[0034] In combination with reference Figure 5 The positive electrode 11 of the battery cell and the conductive shell 12 can be separated by an insulating component such as an insulating ring or an insulating ring to prevent the positive electrode 11 of the battery cell from being in contact with the conductive shell 12 and short-circuiting; the insulating component can be connected to the diaphragm inside the battery cell 1, so as to completely isolate the positive electrode 11 of the battery cell and the conductive shell 12. The conductive shell 12 can be a metal shell or an alloy shell or a shell made of other conductive materials, which can be in contact with the negative electrode 13 of the battery cell, so as to be connected in conductive communication with the circuit board 3. Specifically, the conductive shell 12 can be a steel shell, which further improves the structural strength of the device.

[0035] The circuit board 3 is located above the positive electrode 11 of the battery cell, which facilitates the conductive communication between the positive electrode conductive sheet 6 and the positive electrode 11 of the battery cell. In the vertical direction, the insulating support 2 is arranged between the positive electrode 11 of the battery cell and the circuit board 3, and the insulating support 2 can be used to fix the position of the circuit board 3, thereby improving the stability of the device; in the horizontal direction, the insulating support 2 is located between the positive electrode conductive sheet 6 and the negative electrode conductive sheet 7, which can prevent the positive electrode conductive sheet 6 from being in contact with the negative electrode conductive sheet 7 and short-circuiting. The material of the insulating support 2 can be a common insulating material, and the materials of the positive electrode conductive sheet 6 and the negative electrode conductive sheet 7 can both be common conductive materials.

[0036] The rechargeable lithium battery device of the embodiment comprises a battery cell 1 with a conductive shell 12, a circuit board 3, a positive conductive sheet 6, a negative conductive sheet 7 and an insulating support 2; wherein the conductive shell 12 serves as the conductive shell 12, the top of the battery cell 1 is a cell positive pole 11; the circuit board 3 is connected to the cell positive pole 11 and the conductive shell 12 through the positive conductive sheet 6 and the negative conductive sheet 7 respectively, thereby forming a complete charging circuit of the circuit board 3 and the battery cell 1, the positive conductive sheet 6 and the negative conductive sheet 7 are simple in structure and easy to assemble, and can be connected by being attached, thereby reducing the risk of short circuit; and the insulating support 2 is further arranged to fix the position of the circuit board 3, prevent the positive conductive sheet 6 and the negative conductive sheet 7 from being in contact, improve the stability of the device, and further reduce the risk of short circuit.

[0037] By reference Figure 6 In some embodiments, the positive conductive sheet 6 comprises a first horizontal section 61, a first vertical section 62 and a second horizontal section 63 connected in sequence, the first horizontal section 61 is located between the cell positive pole 11 and the insulating support 2, and the second horizontal section 63 is attached to the circuit board 3; the position of the positive conductive sheet 6 can be fixed through the first horizontal section 61 and the second horizontal section 63, thereby improving the connection stability of the cell positive pole 11 and the circuit board 3.

[0038] The first vertical section 62 is used to connect the first horizontal section 61 and the second horizontal section 63, specifically, the first vertical section 62 and the first horizontal section 61 can be connected through arc transition, or are connected through a first bending section 65 arranged between the first vertical section 62 and the first horizontal section 61, the angle of the first bending section 65 can be set according to actual needs; similarly, the first vertical section 62 and the second horizontal section 63 can be connected through arc transition, or are connected through a second bending section 64 arranged between the first vertical section 62 and the second horizontal section 63, the angle of the second bending section 64 can be set according to actual needs.

[0039] Further, the insulating support 2 is provided with a connecting through hole 21 corresponding to the first horizontal section 61, and the first horizontal section 61 is attached to the cell positive pole 11 through the connecting through hole 21. The first horizontal section 61 is attached to the cell positive pole 11 through the connecting through hole 21, the position of the positive conductive sheet 6 in the insulating support 2 can be fixed through the connecting through hole 21, thereby playing a limiting role and further improving the connection stability of the cell positive pole 11 and the circuit board 3.

[0040] By reference Figure 7In some embodiments, the negative conductive sheet 7 comprises a second vertical segment 71, a connecting segment 73 and a third vertical segment 72 connected in sequence, the second vertical segment 71 is connected with the conductive shell 12, and the third vertical segment 72 is connected with the circuit board 3. The position of the negative conductive sheet 7 can be fixed by the second vertical segment 71 and the third vertical segment 72, and the connection stability of the conductive shell 12 and the circuit board 3 is improved. Specifically, the circuit board 3 has a charging port, and the negative conductive sheet 7 is used to connect the conductive shell 12 and the charging port (or the shell of the charging port) of the circuit board 3; the third vertical segment 72 is close to the charging port or the shell of the charging port of the circuit board 3, and the negative conductive sheet 7 is connected with the charging port of the circuit board 3 through the third vertical segment 72.

[0041] The connecting segment 73 is used to connect the second vertical segment 71 and the third vertical segment 72. Specifically, the connecting segment 73 can be connected with the second vertical segment 71 and the third vertical segment 72 in circular arc transition, respectively; or the third vertical segment 71 and the connecting segment 73 are connected through a third bending segment 75, and the third vertical segment 72 and the connecting segment 73 are connected through a fourth bending segment 74, and the angles of the third bending segment 75 and the fourth bending segment 74 can be set according to actual needs.

[0042] The negative conductive sheet 7 can further comprise a third horizontal segment, one end of the third vertical segment 72 is connected with the connecting segment 73, and the other end is connected with the third horizontal segment, and the third horizontal segment is connected with the main board 32 of the circuit board 3, so as to further fix the position of the negative conductive sheet 7.

[0043] Further, the insulating support 2 is provided with a connecting groove 24 corresponding to the third vertical segment 72, and the third vertical segment 72 is connected with the circuit board 3 through the connecting groove 24. The third vertical segment 72 is connected with the circuit board 3 through the connecting groove 24, so as to fix the position of the negative conductive sheet 7 in the insulating support 2, and play a limiting role, and further improve the connection stability of the conductive shell 12 and the circuit board 3.

[0044] In addition, the connecting through hole 21 and the connecting groove 24 can be arranged at different positions of the insulating support 2, so as to separate the positive conductive sheet 6 and the negative conductive sheet 7, and prevent the two from being in contact and short-circuiting; specifically, the insulating support 2 comprises a bottom surface and a side surface, the connecting through hole 21 can be arranged on the bottom surface of the insulating support 2, and the connecting groove 24 can be arranged on the side surface of the insulating support 2.

[0045] Combination reference Figure 8In some embodiments, the circuit board 3 comprises a main board 32, an on-off key 31 and a positive electrode protrusion 33; the on-off key 31 is located between the main board 32 and the insulating support 2, and the insulating support 2 is provided with an opening 23 corresponding to the on-off key 31; the positive electrode protrusion 33 is arranged above the main board 32, and the positive electrode conductive sheet 6 is connected with the positive electrode protrusion 33 through the main board 32. The on-off key 31 is used to control the opening and closing of the circuit board 3; the opening 23 is provided to facilitate the exposure of the on-off key 31, so as to control the opening and closing of the on-off key 31, and further control the opening and closing of the circuit board 3; the positive electrode protrusion 33 is protrudingly arranged to facilitate connection and contact. The circuit board 3 can also be provided with a plurality of chips such as a first chip 34 and a second chip 35 according to actual needs.

[0046] In some embodiments, the rechargeable lithium battery device further comprises a device shell 8, which is sleeved on the outside of the battery cell 1; the device shell 8 is provided with a through hole corresponding to the opening 23. Specifically, in the prior art, the commonly used connection structure is that the device shell 8 is directly connected with the positive and negative electrodes of the battery cell 1 through the circuit board 3, so that when the device shell 8 is accidentally touched, the loop between the battery cell 1 and the circuit board 3 is easily affected; in the technical solution of the present application, the device shell 8 is not directly connected with the positive and negative electrodes of the battery cell 1, so that in the technical solution of the present application, the device shell 8 does not actually participate in the loop between the battery cell 1 and the circuit board 3, and thus when the device shell 8 is accidentally touched, it will not affect the loop between the battery cell 1 and the circuit board 3; the device shell 8 is a hollow structure, which is used to protect the battery cell 1 and facilitate the exposure of the positive and negative electrodes of the device for easy contact and connection; the device shell 8 can enhance the strength of the device and prevent the internal part of the device from being damaged by external force; the through hole corresponding to the opening 23 on the device shell 8 facilitates the exposure of the on-off key 31 corresponding to the opening 23. At the same time, the second vertical section 71 is located between the device shell 8 and the insulating support 2, and the second vertical section 71 is located between the conductive shell 12 and the device shell 8, which can further open and close the position of the second vertical section 71.

[0047] Combined reference Figure 9 In some embodiments, the rechargeable lithium battery device further comprises an upper cover 4, which is located above the circuit board 3; the upper cover 4 is provided with a through hole corresponding to the positive electrode protrusion 33, which facilitates the exposure of the positive electrode protrusion 33 and facilitates the contact of the positive electrode. Moreover, the top of the device shell 8 is located above the upper cover 4 and abuts against the upper cover 4, thereby fixing the position of the upper cover 4.

[0048] Specifically, the device housing 8 is sequentially sleeved from top to bottom with the upper cover 4, the circuit board 3, the insulating support 2, the insulating ring 5 and the battery cell 1. The conductive shell 12 of the battery cell 1 is connected to the main plate 32 of the circuit board 3 through the negative conductive sheet 7; the cell positive pole 11 of the battery cell 1 is connected to the main plate 32 of the circuit board 3 through the positive conductive sheet 6, and is further connected to the positive pole protrusion 33, so that the battery cell 1 and the circuit board 3 form a complete closed loop, and the main plate 32 of the circuit board 3 can be controlled to be opened or closed through the key 31, thereby controlling the charging operation of the cell positive pole 11 and the conductive shell 12 of the battery cell 1. The device housing 8 can completely cover the conductive shell 12, or partially cover the conductive shell 12.

[0049] That is, the rechargeable lithium battery device can be used as a battery by exposing the positive pole protrusion 33 at the top of the device housing 8, the cell negative pole 13 at the bottom of the device housing 8, and / or the partially exposed conductive shell 12, to supply power to other devices.

[0050] Further, the upper cover 4 is provided with a first protrusion 41, and the insulating support 2 is provided with a first groove 22 corresponding to the first protrusion 41. The first protrusion 41 and the first groove 22 are engaged to connect the insulating support 2 and the upper cover 4, thereby fixing the position of the circuit board 3 inside the two, improving the stability of the device. Meanwhile, in order to further improve the connection stability of the insulating support 2 and the upper cover 4, the upper cover 4 can be further provided with a second protrusion 42, and the insulating support 2 is provided with a second groove 25 corresponding to the second protrusion 42. Correspondingly, the main plate 32 of the circuit board 3 can also be provided with through holes corresponding to the first protrusion 41 and the second protrusion 42, so as to fix the position of the main plate 32 of the circuit board 3 while connecting the insulating support 2 and the upper cover 4, and further fix the positions of the negative conductive sheet 7 and the positive conductive sheet 6.

[0051] In some embodiments, the rechargeable lithium battery device further comprises an insulating ring 5 arranged between the cell positive pole 11 and the insulating support 2, the positive conductive sheet 6 is located on the inner side of the insulating ring 5, and the negative conductive sheet 7 is located on the outer side of the insulating ring 5. The insulating ring 5 can isolate the positive conductive sheet 6 and the negative conductive sheet 7; in addition, the insulating ring 5 can be attached to the battery cell 1 and sleeved around the cell positive pole 11, so as to isolate the cell positive pole 11 and the conductive shell 12 of the battery cell 1, and prevent the positive and negative poles from contacting each other and short-circuiting.

[0052] In summary, the application provides a rechargeable lithium battery device including a battery cell, a circuit board, a positive conductive sheet, a negative conductive sheet and an insulating support; wherein the conductive shell is electrically connected with the negative electrode of the battery cell, and the conductive shell is insulated from the positive electrode of the battery cell; the circuit board is connected with the positive electrode of the battery cell and the conductive shell through the positive conductive sheet and the negative conductive sheet, thereby forming a complete charging circuit of the circuit board and the battery cell; the positive conductive sheet and the negative conductive sheet are simple in structure and easy to assemble, and can be connected by contact, thereby reducing the risk of short circuit; and the insulating support is further provided to fix the position of the circuit board, prevent the positive conductive sheet and the negative conductive sheet from contacting, improve the stability of the device, and further reduce the risk of short circuit.

[0053] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the examples of the application.

Claims

1. A rechargeable lithium battery device, characterized by, The application relates to a rechargeable lithium battery device. The rechargeable lithium battery device comprises a battery cell, a circuit board, a positive electrode conductive sheet, a negative electrode conductive sheet, an insulating support and a device shell. The battery cell comprises a conductive shell, a cell positive electrode and a cell negative electrode, the conductive shell is electrically connected with the cell negative electrode, and the conductive shell is insulated from the cell positive electrode. The circuit board is arranged at the upper end of the cell positive electrode. The positive electrode conductive sheet connects the cell positive electrode and the circuit board. The negative electrode conductive sheet connects the conductive shell and the circuit board.

2. The rechargeable lithium battery device of claim 1, wherein, The insulating support is arranged between the cell positive electrode and the circuit board, and is used for fixing the circuit board.

3. The rechargeable lithium battery device of claim 2, wherein, The positive electrode conductive sheet comprises a first horizontal section, a first vertical section and a second horizontal section which are sequentially connected.

4. The rechargeable lithium battery device of claim 1, wherein, The first horizontal section is arranged between the cell positive electrode and the insulating support.

5. The rechargeable lithium battery device of claim 4, wherein, The insulating support is provided with a connecting through hole corresponding to the first horizontal section.

6. The rechargeable lithium battery device of claim 1, wherein, The first horizontal section passes through the connecting through hole and is attached to the cell positive electrode.

7. The rechargeable lithium battery device of claim 6, wherein, The negative electrode conductive sheet comprises a second vertical section, a connecting section and a third vertical section which are sequentially connected.

8. The rechargeable lithium battery device of claim 6, wherein, The second vertical section is attached to the conductive shell.

9. The rechargeable lithium battery device of claim 8, wherein, The third vertical section is attached to the circuit board.

10. The rechargeable lithium battery device of claim 1, wherein, The insulating support is provided with a connecting groove corresponding to the third vertical section. The third vertical section passes through the connecting groove and is attached to the circuit board. The circuit board comprises a main board, a key and a positive electrode protrusion. The key is arranged between the main board and the insulating support. The insulating support is provided with an opening corresponding to the key. The positive electrode protrusion is arranged above the main board. The positive electrode conductive sheet is connected with the positive electrode protrusion through the main board. The rechargeable lithium battery device further comprises an upper cover arranged above the circuit board. The upper cover is provided with a through hole corresponding to the positive electrode protrusion. The upper cover is provided with a first protrusion. The insulating support is provided with a first groove corresponding to the first protrusion. The rechargeable lithium battery device further comprises an insulating ring arranged between the cell positive electrode and the insulating support. The positive electrode conductive sheet is arranged inside the insulating ring. The negative electrode conductive sheet is arranged outside the insulating ring.

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