Multi-cell rechargeable battery with USB interface

Abstract

A multi-cell rechargeable battery with a USB interface comprises an integrated circuit board, a cell assembly, a negative shell and a positive shell cover covering the negative shell, the integrated circuit board is installed on the positive shell cover, and the cell assembly is arranged in a cavity defined by the positive shell cover and the negative shell. The battery cell assembly comprises a plurality of battery cells, a positive electrode connecting piece and a negative electrode connecting piece electrically connected with the negative electrode shell, the positive electrode connecting piece and the negative electrode connecting piece are connected with the positive electrode of at least one battery cell and the negative electrode of at least one battery cell respectively, the integrated circuit board is provided with a positive electrode conductive end and a negative electrode conductive end, the positive electrode conductive end is electrically connected with the positive electrode connecting piece, and the negative electrode conductive end is electrically connected with the negative electrode shell. The positive conductive end is electrically connected with the positive shell, the negative conductive end is electrically connected with the negative shell, the positive shell cover is provided with a positive cap, the positive cap is electrically connected with the positive conductive end, the integrated circuit board is provided with a USB interface, and the positive shell cover is provided with a plug hole for accommodating the USB interface.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a multi-cell rechargeable battery with a USB interface. Background Art

[0002] At present, rechargeable batteries are used more and more widely in daily life. For traditional rechargeable batteries, when the power is low, they need to be charged with a special charger, and the traditional rechargeable batteries must be installed in such a charger for charging. Moreover, people easily forget to bring the charger when going out, which brings many inconveniences to people's use.

[0003] Most of the current rechargeable batteries use a single-cell structure, and their battery capacity is low. In order to increase the capacity of the battery, the number of cells is generally increased. However, when the number of cells is increased, the number of wires connecting the cells and the circuit board also needs to be increased, which requires more space to accommodate the wires, resulting in the use of smaller cells, which in turn affects the overall energy density of the battery. Utility Model Content

[0004] The utility model aims to provide a multi-cell rechargeable battery with a built-in USB interface to solve the problems that the current rechargeable battery needs to be charged with a dedicated charger and the rechargeable battery has a low capacity.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multi-cell rechargeable battery with a built-in USB interface comprises an integrated circuit board, a cell assembly, a negative electrode shell and a positive electrode shell cover covered on the negative electrode shell, wherein the integrated circuit board is mounted on the positive electrode shell cover, the cell assembly is arranged in a cavity surrounded by the positive electrode shell cover and the negative electrode shell, the cell assembly comprises a plurality of cells, a positive electrode connecting piece and a negative electrode connecting piece electrically connected to the negative electrode shell, the positive electrode connecting piece and the negative electrode connecting piece are respectively connected to the positive electrode of at least one cell and the negative electrode of at least one cell, the integrated circuit board comprises a positive electrode conductive end and a negative electrode conductive end, the positive electrode conductive end is electrically connected to the positive electrode connecting piece, the negative electrode conductive end is electrically connected to the negative electrode shell, a positive electrode cap is arranged on the positive electrode shell cover, the positive electrode cap is electrically connected to the positive electrode conductive end, a USB interface is arranged on the integrated circuit board, and a plug hole for accommodating the USB interface is provided on the positive electrode shell cover.

[0007] Furthermore, the positive electrode connecting piece is connected to the positive electrode of the battery cell by welding, and the negative electrode connecting piece is connected to the negative electrode of the battery cell by welding.

[0008] Furthermore, the negative electrode connecting piece of the battery cell assembly is elastically connected to the inner bottom wall of the negative electrode shell through a first elastic member.

[0009] Furthermore, the battery cell assembly further includes a fastening sleeve, which is wrapped around the side walls of the battery cells and abuts against the inner side wall of the negative electrode shell.

[0010] Furthermore, the USB interface is a Micro USB interface or a Type-C interface.

[0011] Furthermore, a second elastic member is disposed on the integrated circuit board, the second elastic member is connected to the positive conductive end of the integrated circuit board, and the second elastic member abuts against the positive connecting sheet.

[0012] Furthermore, a negative electrode extension piece is provided on the integrated circuit board, the negative electrode extension piece extends out of the periphery of the integrated circuit board, one end of the negative electrode extension piece is electrically connected to the negative electrode conductive end, and the other end of the negative electrode extension piece abuts against the inner wall of the negative electrode shell and is electrically connected to the negative electrode shell.

[0013] Furthermore, an indicator light is provided on the integrated circuit board, and the indicator light lights up in different ways to indicate the charging and discharging status.

[0014] Furthermore, the positive electrode cap has a protruding portion and an extension portion connected to the protruding portion, the protruding portion protrudes out of the upper surface of the positive electrode shell cover, and the extension portion passes through the positive electrode shell cover and is connected to the positive electrode conductive end of the integrated circuit board.

[0015] Furthermore, the positive electrode cap also has a clamping portion connected to the protruding portion, the clamping portion and the extending portion are arranged opposite to each other, and the clamping portion is protruding with a protrusion, which abuts against the positive electrode shell cover.

[0016] The utility model discloses a multi-cell rechargeable battery with a built-in USB interface, which has the following beneficial effects: by combining the cell with the USB interface of the integrated circuit board, the charging operation of the battery becomes more convenient; by respectively connecting the positive electrode and the negative electrode of the cell with the positive electrode connecting piece and the negative electrode connecting piece, it is avoided that the cell is respectively connected with the integrated circuit board and the negative electrode shell through welding wires, and the accommodation space is reserved for the cell to the maximum extent, so as to improve the energy density of the battery and reduce the difficulty of assembling the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a multi-cell rechargeable battery with a USB interface according to Example 1 of the utility model.

[0018] Figure 2 for Figure 1 A three-dimensional exploded view of a multi-cell rechargeable battery with a built-in USB interface is shown.

[0019] Figure 3 for Figure 2 A three-dimensional view of the battery cell assembly is shown.

[0020] Figure 4 for Figure 3 A perspective view of the fastening sleeve is shown.

[0021] Figure 5 for Figure 2 A three-dimensional view of the positive electrode case cover shown.

[0022] Figure 6 for Figure 2 A three-dimensional view of the positive electrode cap is shown.

[0023] Figure 7 for Figure 2 A perspective view of the integrated circuit board shown.

[0024] Figure 8 for Figure 1 A cross-sectional view of a multi-cell rechargeable battery with a built-in USB interface is shown.

[0025] Fig. 9 for Figure 8 Enlarged cross-sectional view at point A in the middle.

[0026] Fig.10 for Figure 8 Enlarged cross-sectional view at point B.

[0027] Fig.11 This is a cross-sectional view of a multi-cell rechargeable battery with a built-in USB interface according to Example 2 of the utility model.

[0028] Fig.12 for Fig.11 A stereoscopic view of the first spring piece shown in FIG. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the utility model indicate directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limitations on the present application.

[0031] Embodiment 1:

[0032] See also Figure 1 , Figure 2 , Figure 8 and Fig. 9A multi-cell rechargeable battery with a built-in USB interface includes an integrated circuit board 30, a cell assembly 40, a negative electrode shell 20 and a positive electrode shell cover 10 covering the negative electrode shell 20, wherein the integrated circuit board 30 is mounted on the positive electrode shell cover 10, and the cell assembly 40 is arranged in a cavity 100 surrounded by the positive electrode shell cover and the negative electrode shell 20.

[0033] The battery cell assembly 40 includes a plurality of battery cells 41, a positive electrode connecting sheet 42 and a negative electrode connecting sheet 43 electrically connected to the negative electrode housing 20. The positive electrode connecting sheet 42 and the negative electrode connecting sheet 43 are connected to the positive electrode of at least one battery cell 41 and the negative electrode of at least one battery cell 41, respectively.

[0034] The integrated circuit board 30 has a positive conductive end and a negative conductive end. The positive conductive end is electrically connected to the positive connecting piece 42 , and the negative conductive end is electrically connected to the negative electrode housing 20 .

[0035] The positive electrode shell cover 10 is provided with a positive electrode cap 11 , and the positive electrode cap 11 is electrically connected to the positive electrode conductive end. The integrated circuit board 30 is provided with a USB interface 31 , and the positive electrode shell cover 10 is provided with a plug hole 12 for accommodating the USB interface 31 .

[0036] As described above, the multi-cell rechargeable battery with built-in USB interface proposed by the utility model, by combining the battery cell 41 with the USB interface 31 of the integrated circuit board 30, realizes that the charging operation of the battery becomes more convenient; the positive electrode connecting plate 42 and the negative electrode connecting plate 43 are respectively connected to the positive electrode and the negative electrode of the battery cell 41, thereby avoiding the battery cell 41 being respectively connected to the integrated circuit board 30 and the negative electrode shell 20 by welding wires, and reserving the accommodation space for the battery cell 41 to the maximum extent, thereby improving the energy density of the battery and reducing the difficulty of assembling the battery.

[0037] See also Figure 3 , the positive electrodes of the several cells 41 in the cell assembly 40 may all face the positive electrode shell cover 10 or all face the bottom wall of the negative electrode shell 20, or the positive electrodes of some of the cells 41 may face the positive electrode shell cover 10 while the positive electrodes of some of the cells 41 face the bottom wall of the negative electrode shell 20, which is not limited here. Preferably, in the present embodiment, the positive electrodes of several cells 41 all face the positive electrode shell cover 10, then the positive electrodes of several cells 41 are all connected to the positive electrode connecting sheet 42, and the negative electrodes of several cells 41 are all connected to the negative electrode connecting sheet 43. This arrangement can avoid the connection between different cells 41 through wires, so that the structure of the cell assembly 40 is simple and the difficulty of battery assembly is reduced.

[0038] Furthermore, the positive electrode connecting piece 42 is connected to the positive electrode of the battery cell 41 by welding, and the negative electrode connecting piece 43 is connected to the negative electrode of the battery cell 41 by welding. By welding, the positive electrode connecting piece 42 and the positive electrode of the battery cell 41, and the negative electrode connecting piece 43 and the negative electrode of the battery cell 41 can be firmly connected to avoid poor contact.

[0039] See also Fig.10 The negative electrode connecting piece 43 of the battery cell assembly 40 is elastically connected to the inner bottom wall of the negative electrode shell 20 through a first elastic member, and the negative electrode connecting piece 43 is electrically connected to the negative electrode shell 20 through the first elastic member, then the negative electrode of the battery cell 41 is electrically connected to the negative electrode conductive end of the integrated circuit board 30.

[0040] More specifically, the two ends of the first elastic member always respectively abut against the negative electrode connecting sheet 43 and the inner bottom wall of the negative electrode shell 20, which can not only avoid the poor contact between the negative electrode connecting sheet 43 and the negative electrode shell 20, but also play a buffering role for the battery cell assembly 40, avoiding a large collision between the battery cell 41 and the negative electrode shell 20.

[0041] Furthermore, in this embodiment, the first elastic member is a conical spring 50 , the end of the conical spring 50 with a larger diameter abuts against the inner bottom wall of the negative electrode housing 20 , and the end of the conical spring 50 with a smaller diameter abuts against the negative electrode connecting piece 43 .

[0042] See also Figure 2-Figure 4 and Figure 8 The battery cell assembly 40 further includes a fastening sleeve 44, which is provided with fastening holes 441 corresponding to the battery cells 41, and the battery cells 41 are arranged on the fastening holes 441. The fastening sleeve 44 is wrapped around the side walls of the battery cells 41, and the fastening sleeve 44 abuts against the inner side wall of the negative electrode housing 20. The fastening sleeve 44 fastens the battery cells 41 and also acts as a buffer for the battery cells 41.

[0043] In addition, the battery cell 41 may be a rechargeable lithium battery or a rechargeable sodium battery.

[0044] The USB interface 31 is a Micro USB interface 31 or a Type-C interface. In this embodiment, the USB interface 31 adopts a Type-C interface.

[0045] See also Figure 7-Figure 9, the upper surface of the integrated circuit board 30 abuts against the positive electrode case cover 10, and the integrated circuit board 30 is elastically connected to the battery cell assembly 40. A second elastic member is provided on the integrated circuit board 30, the second elastic member is connected to the positive electrode conductive end of the integrated circuit board 30, and the second elastic member abuts against the positive electrode connecting piece 42 of the battery cell assembly 40, so that the positive electrode conductive end is electrically connected to the positive electrode connecting piece 42.

[0046] More specifically, the second elastic member always presses against the negative electrode connecting piece 43 , so that the electrical connection between the positive electrode connecting piece 42 and the positive electrode conductive end of the integrated circuit board 30 is more stable.

[0047] Furthermore, in this embodiment, the second elastic member is a return spring 34 , one end of the return spring 34 is welded to the positive electrode conductive end, and the other end of the return spring 34 abuts against the positive electrode connecting piece 42 .

[0048] See also Figure 7 A negative electrode extension sheet 33 is provided on the integrated circuit board 30, and the negative electrode extension sheet 33 extends out of the periphery of the integrated circuit board 30. One end of the negative electrode extension sheet 33 is electrically connected to the negative electrode conductive end, and the other end of the negative electrode extension sheet 33 abuts against the inner wall of the negative electrode housing 20 and is electrically connected to the negative electrode housing 20, so that the negative electrode conductive end is electrically connected to the negative electrode of the battery cell 41.

[0049] See also Figure 7 The integrated circuit board 30 is also provided with an indicator light 32, which lights up in different ways to indicate the state of charge and discharge. More specifically, the positive electrode case cover 10 can be made of a transparent material or the positive electrode case cover 10 can have a light hole corresponding to the indicator light 32 to play the role of the indicator light 32.

[0050] The positive electrode case cover 10 and the negative electrode case 20 can be connected by a snap-fit ​​structure or by an interference fit. In this embodiment, the positive electrode case cover 10 and the inner side wall of the negative electrode case 20 are interference fit. More specifically, the outer side wall of the negative electrode case 20 is wrapped with a PVC heat shrink film.

[0051] See also Figure 5 , Figure 6 and Fig. 9The positive electrode cap 11 has a protruding portion 111 and an extension portion 112 connected to the protruding portion 111. The positive electrode case cover 10 is provided with a first through hole 13 corresponding to the protruding portion 111. The protruding portion 111 protrudes out of the upper surface of the positive electrode case cover 10. The extension portion 112 passes through the first through hole 13 of the positive electrode case cover 10 and is connected to the positive electrode conductive end of the integrated circuit board 30, so that the positive electrode of the battery cell 41 is electrically connected to the positive electrode cap 11.

[0052] The positive electrode cap 11 also has a clamping portion 113 connected to the protruding portion 111, and the clamping portion 113 is arranged opposite to the extension portion 112. The positive electrode case cover 10 is provided with a second through hole 14 corresponding to the clamping portion 113, and the clamping portion 113 passes through the second through hole 14. The clamping portion 113 is provided with a protrusion 1131, and the protrusion 1131 abuts against the lower end edge of the second through hole 14 of the positive electrode case cover 10. The clamping portion 113 abuts against the lower end edge of the second through hole 14, so that the connection between the positive electrode cap 11 and the positive electrode case cover 10 is more stable.

[0053] Embodiment 2:

[0054] A multi-cell rechargeable battery with a built-in USB interface, whose structure is similar to that of the multi-cell rechargeable battery with a built-in USB interface in Example 1, except that:

[0055] See also Figure 11-Figure 12 In this embodiment, the first elastic member is a first elastic piece 60 .

[0056] The first elastic piece 60 has a contact portion 61, a movable portion 63 and a connecting portion 62 connecting the contact portion 61 and the movable portion 63. The contact portion 61 is connected to the inner bottom wall of the negative electrode shell 20, and the movable portion 63 is connected to the negative electrode connecting piece 43 of the battery cell assembly 40, so as to realize electrical connection between the negative electrode connecting piece 43 and the negative electrode shell 20.

[0057] In this embodiment, the second elastic member is a second spring sheet 35. The second spring sheet 35 has the same structure as the first spring sheet 60, which will not be described in detail. The positive conductive end of the integrated circuit board 30 is electrically connected to the positive connecting sheet 42 of the battery cell assembly 40 through the second spring sheet 35.

[0058] The utility model has the beneficial effects of a multi-cell rechargeable battery with a built-in USB interface: not only the charging operation of the rechargeable battery becomes more convenient, but also the energy density of the battery is improved and the difficulty of assembling the battery is reduced.

[0059] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A multi-cell rechargeable battery with a built-in USB interface, characterized in that: The invention comprises an integrated circuit board, a battery cell assembly, a negative electrode shell and a positive electrode shell cover covering the negative electrode shell, wherein the integrated circuit board is mounted on the positive electrode shell cover, the battery cell assembly is arranged in a cavity surrounded by the positive electrode shell cover and the negative electrode shell, the battery cell assembly comprises a plurality of battery cells, a positive electrode connecting sheet and a negative electrode connecting sheet electrically connected to the negative electrode shell, the positive electrode connecting sheet and the negative electrode connecting sheet are respectively connected to the positive electrode of at least one of the battery cells and the negative electrode of at least one of the battery cells, the integrated circuit board has a positive electrode conductive end and a negative electrode conductive end, the positive electrode conductive end is electrically connected to the positive electrode connecting sheet, the negative electrode conductive end is electrically connected to the negative electrode shell, a positive electrode cap is arranged on the positive electrode shell cover, the positive electrode cap is electrically connected to the positive electrode conductive end, a USB interface is arranged on the integrated circuit board, and a plug hole for accommodating the USB interface is provided on the positive electrode shell cover.

2. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: The positive electrode connecting piece is connected to the positive electrode of the battery cell by welding, and the negative electrode connecting piece is connected to the negative electrode of the battery cell by welding.

3. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: The negative electrode connecting piece of the battery cell assembly is elastically connected to the inner bottom wall of the negative electrode shell through a first elastic member.

4. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: The battery core assembly further includes a fastening sleeve, which is wrapped around the side walls of the battery cores and abuts against the inner side wall of the negative electrode shell.

5. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: The USB interface is a Micro USB interface or a Type-C interface.

6. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: A second elastic member is disposed on the integrated circuit board. The second elastic member is connected to the positive conductive end of the integrated circuit board, and the second elastic member abuts against the positive connecting sheet.

7. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: A negative electrode extension piece is arranged on the integrated circuit board, and the negative electrode extension piece extends out of the periphery of the integrated circuit board, one end of the negative electrode extension piece is electrically connected to the negative electrode conductive end, and the other end of the negative electrode extension piece abuts against the inner wall of the negative electrode shell and is electrically connected to the negative electrode shell.

8. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: An indicator light is arranged on the integrated circuit board, and the indicator light lights up in different ways to indicate the charging and discharging status.

9. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 1, characterized in that: The positive electrode cap has a protruding portion and an extension portion connected to the protruding portion, the protruding portion protrudes out of the upper surface of the positive electrode case cover, and the extension portion passes through the positive electrode case cover and is connected to the positive electrode conductive end of the integrated circuit board.

10. The multi-cell rechargeable battery with a built-in USB interface as claimed in claim 9, characterized in that: The positive electrode cap also has a clamping portion connected to the protruding portion, the clamping portion is arranged opposite to the extending portion, and the clamping portion is protruding with a protrusion, which abuts against the positive electrode shell cover.

Images