Battery charging structure and electronic equipment

Abstract

The utility model discloses a battery charging structure and electronic equipment, and the battery charging structure comprises a battery cell which is provided with a first electrode and a second electrode; the circuit board comprises a printed circuit board and a flexible circuit board, and the circuit board is connected with a first charging connector and a second charging connector; wherein the flexible circuit board comprises a first charging circuit connected with the first charging connector and the first electrode, and a second charging circuit connected with the second charging connector and the first electrode; the printed circuit board comprises a third charging circuit connected with the first charging connector and the second electrode, and a fourth charging circuit connected with the second charging connector and the second electrode; the first charging circuit and the third charging circuit are used for forming a first loop, and the second charging circuit and the fourth charging circuit are used for forming a second loop. The utility model has the advantage of compact structure.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery charging structure and electronic equipment. Background Art

[0002] In order to improve charging efficiency, the battery charging structure in the prior art uses two charging connectors to charge the battery cells. Each charging connector needs to form a loop with the positive and negative electrodes of the battery cell. In the prior art, a separate adapter plate is used to arrange a part of the charging circuit. The adapter plate causes the size of the entire battery charging structure to be too large and the structure is not compact enough. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a new technical solution for a battery charging structure and an electronic device.

[0004] According to a first aspect of an embodiment of the present application, a battery charging structure is provided, comprising: a battery cell, the battery cell having a first electrode and a second electrode; a circuit board, the circuit board comprising a printed circuit board and a flexible circuit board, the circuit board being connected to a first charging connector and a second charging connector; wherein the flexible circuit board comprises a first charging circuit connecting the first charging connector and the first electrode, and a second charging circuit connecting the second charging connector and the first electrode; the printed circuit board comprises a third charging circuit connecting the first charging connector and the second electrode, and a fourth charging circuit connecting the second charging connector and the second electrode; the first charging circuit and the third charging circuit are used to form a first loop, and the second charging circuit and the fourth charging circuit are used to form a second loop.

[0005] Optionally, the first charging connector and the second charging connector are located on the flexible circuit board; the flexible circuit board also includes a fifth charging circuit and a sixth charging circuit, the third charging circuit is connected to the first charging connector through the fifth charging circuit, and the fourth charging circuit is connected to the second charging connector through the sixth charging circuit.

[0006] Optionally, the flexible circuit board has a bridging portion and a main body portion, the first charging connector and the second charging connector are located in the main body portion of the flexible circuit board; the first charging circuit is connected to the first electrode via the main body portion; the second charging circuit is connected to the first electrode via the main body portion and the bridging portion; there is a gap between the bridging portion and the main body portion, and the second electrode is connected to the third charging circuit and the fourth charging circuit through the gap.

[0007] Optionally, the main body portion and the bridge portion are arranged at an angle, and at least a portion of the main body portion abuts against a tab of the battery cell, and at least a portion of the bridge portion abuts against an end face of the battery cell.

[0008] Optionally, the flexible circuit board is provided with a connecting piece, the connecting piece has a first side wall close to the main body and a second side wall away from the main body, and the tab of the battery cell is inserted between the first side wall and the second side wall.

[0009] Optionally, the second side wall is bonded to the top sealing structure of the tab by double-sided adhesive.

[0010] Optionally, at least part of the main body is located between the printed circuit board and the tab of the battery cell, and at least part of the bridge portion is located between the printed circuit board and the end surface of the battery cell.

[0011] Optionally, the flexible circuit board further comprises an arm portion, and the arm portion is provided with a patch type temperature sensor.

[0012] Optionally, the flexible circuit board has a first end and a second end, the first end is connected to the first charging connector, and the second end is connected to the second charging connector; the first end and the second end are close to each other so that at least a portion of the printed circuit board is surrounded by the main body of the flexible circuit board.

[0013] Optionally, the battery charging structure further comprises insulating paper, which at least wraps the printed circuit board, the flexible circuit board and a portion of the tabs of the battery cell, and at least covers a portion of the top sealing structure of the tabs of the battery cell.

[0014] According to a second aspect of an embodiment of the present application, an electronic device is provided, wherein the electronic device includes the battery charging structure as described above.

[0015] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0017] Figure 1 A three-dimensional diagram of a battery charging structure in an embodiment of the present application;

[0018] Figure 2 An exploded diagram of a battery charging structure in an embodiment of the present application;

[0019] Figure 3It is a front view of the battery charging structure in the embodiment of the present application;

[0020] Figure 4 A rear view of the battery charging structure in an embodiment of the present application;

[0021] Figure 5 It is a side view of the battery charging structure in the embodiment of the present application, wherein part A is partially cut away;

[0022] Figure 6 for Figure 5 A partial enlarged view of part A in FIG.

[0023] Figure 7 It is a front view of the circuit board in the embodiment of the present application, wherein the flexible circuit board is in an unfolded state;

[0024] Figure 8 It is a bottom view of the circuit board in the embodiment of the present application, wherein the flexible circuit board is in an unfolded state;

[0025] Fig. 9 It is a rear view of the circuit board in the embodiment of the present application, wherein the flexible circuit board is in an unfolded state;

[0026] Fig.10 is a three-dimensional diagram of a circuit board in an embodiment of the present application, wherein the flexible circuit board is in a folded state;

[0027] Fig.11 It is a three-dimensional view of the circuit board in the embodiment of the present application from another angle, wherein the flexible circuit board is in a folded state;

[0028] Fig.12 It is a front view of the flexible circuit board in the embodiment of the present application, wherein the flexible circuit board is in a folded state;

[0029] Fig.13 It is a bottom view of the flexible circuit board in the embodiment of the present application, wherein the flexible circuit board is in a folded state;

[0030] Fig.14 is a rear view of the flexible circuit board in the embodiment of the present application, wherein the flexible circuit board is in a folded state;

[0031] Fig.15 It is a front view of the flexible circuit board in the embodiment of the present application, wherein the flexible circuit board is in an unfolded state;

[0032] Fig.16 is a top view of the flexible circuit board in the embodiment of the present application, wherein the flexible circuit board is in an unfolded state;

[0033] Fig.17 It is a rear view of the flexible circuit board in the embodiment of the present application, wherein the flexible circuit board is in an unfolded state;

[0034] Fig.18 Schematic diagram of a charging circuit of a battery charging structure in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 1. Battery cell; 11. First electrode; 12. Top seal structure; 13. End face; 14. Second electrode; 15. Tab; 2. Double-sided tape; 3. Circuit board; 31. First charging connector; 32. Second charging connector; 33. Printed circuit board; 331. Third charging circuit; 332. Fourth charging circuit; 34. Flexible circuit board; 341. Arm; 342. Main body; 343. Bridge; 344. First end; 345. Second end; 346. First charging circuit; 347. Second charging circuit; 348. Fifth charging circuit; 349. Sixth charging circuit; 3410. Gap; 35. Connecting piece; 351. First side wall; 352. Second side wall; 36. SMD temperature sensor; 37. Electronic device. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] like Figures 1 to 4As shown, the battery charging structure in the embodiment of the present application includes a battery cell 1 and a circuit board 3. The battery cell 1 has a first electrode 11 and a second electrode 14 with opposite polarities, wherein the first electrode 11 can be a positive electrode and the second electrode 14 can be a negative electrode, or vice versa, the first electrode 11 can be a negative electrode and the second electrode 14 can be a positive electrode. The battery cell 1 is the main body of the battery and also the energy source of the battery. The battery cell 1 completes the mutual conversion between chemical energy and electrical energy during charging and discharging, and is connected to the circuit board 3 through the tab 15.

[0043] like Figures 1 to 14 As shown, the circuit board 3 includes a printed circuit board (PCB) 33 and a flexible printed circuit (FPC) 34, and the circuit board 3 is connected to a first charging connector 31 and a second charging connector 32. The printed circuit board 33 may be provided with an electronic device 37 to perform charging, over-discharging, short circuit, over-current and other protection functions on the battery 1. Each of the first charging connector 31 and the second charging connector 32 is connected to an external charging power source as a separate charging port to form a complete charging circuit, so there are two charging circuits in the embodiment of the present application.

[0044] like Fig. 9 and Fig.18 As shown, for the sake of clarity, the charging circuits on the flexible circuit board 34 and the printed circuit board 33 are indicated by solid lines with arrows. In practical applications, each charging circuit can be a printed metal layer inside the flexible circuit board 34 and the printed circuit board 33, such as a printed copper layer or a printed silver layer. The flexible circuit board 34 includes a first charging circuit 346 connecting the first charging connector 31 and the first electrode 11, and a second charging circuit 347 connecting the second charging connector 32 and the first electrode 11; the printed circuit board 33 includes a third charging circuit 331 connecting the first charging connector 31 and the second electrode 14, and a fourth charging circuit 332 connecting the second charging connector 32 and the second electrode. The first charging circuit 346 and the third charging circuit 331 are used to form a first loop, and the second charging circuit 347 and the fourth charging circuit 332 are used to form a second loop.

[0045] For example, for the first charging connector 31, the current flows in from the positive electrode of the first charging connector 31, enters the first electrode 11, the second electrode 14, and the third charging circuit 331 through the first charging line 346, and returns to the negative electrode of the first charging connector 31, forming a first loop; for the second charging connector 32, the current flows in from the positive electrode of the second charging connector 32, enters the first electrode 11, the second electrode 14, and the fourth charging circuit 332 through the second charging line 347, and returns to the negative electrode of the second charging connector 32, forming a second loop. In this way, in the battery charging structure of the embodiment of the present application, the charging circuits between the first charging connector 31, the second charging connector 32 and the first electrode 11, the second electrode 14 are all located on the printed circuit board 33 or the flexible circuit board 34, and there is no need to set up a separate adapter board, the size of the battery cell is reduced, and the electronic device using this battery charging structure is more compact. In addition, since it is no longer necessary to add nickel sheet welding between the adapter board and the flexible circuit board 34, the production process is simplified.

[0046] It is understandable that in practical applications, the first circuit may also include other circuits or devices connected to the first charging circuit 346 and the third charging circuit 331, and the embodiment of the present application does not limit this. The second circuit is similar, and no further description is given. Generally speaking, the first circuit and the second circuit are also applicable to battery discharge, which is opposite to the current direction of battery charging.

[0047] like Figures 7 to 14 As shown, the first charging connector 31 and the second charging connector 32 are located on the flexible circuit board 34 . More specifically, the first charging connector 31 and the second charging connector 32 may be located on the main body 342 of the flexible circuit board 34 .

[0048] like Fig. 9 As shown, the flexible circuit board 34 also includes a fifth charging circuit 348 and a sixth charging circuit 349. The flexible circuit board 34 is folded into Fig.10 After the shape is shown, the third charging circuit 331 on the printed circuit board 33 is connected to the fifth charging circuit 348 on the flexible circuit board 34, and the fourth charging circuit 332 on the printed circuit board 33 is connected to the sixth charging circuit 349 on the flexible circuit board 34. The third charging circuit 331 is connected to the first charging connector 31 through the fifth charging circuit 348, and the fourth charging circuit 332 is connected to the second charging connector 32 through the sixth charging circuit 349. By printing the charging circuits on different surfaces of the flexible circuit board 34 and the printed circuit board 33, the connection between the charging circuits can be achieved, which facilitates the installation of the subsequent battery charging structure.

[0049] Fig. 9The indirect connection structure of the third charging line 331 and the fourth charging line 332 with the first charging connector 31 and the second charging connector 32 is exemplarily shown. In other embodiments of the present application, by changing the shape and printed circuit of the printed circuit board 33, the third charging line 331 and the fourth charging line 332 can be directly connected to the first charging connector 31 and the second charging connector 32 respectively, without the fifth charging line 348 and the sixth charging line 349.

[0050] like Figures 15 to 17 As shown, the flexible circuit board 34 has a bridge portion 343 and a main body portion 342 , and a gap 3410 is defined between the bridge portion 343 and the main body portion 342 .

[0051] like Figure 7 As shown, the first charging connector 31 and the second charging connector 32 are located on the main body 342 of the flexible circuit board 34 .

[0052] like Fig. 9 and Fig.18 As shown, the first charging circuit 346 is connected to the first electrode 11 through the main body 342; the second charging circuit 347 is connected to the first electrode 11 through the main body 342 and the bridge 343. The second electrode 14 is connected to the third charging circuit 331 and the fourth charging circuit 332 through the gap 3410. That is, for the first charging connector 31, the current flows in from the positive electrode of the first charging connector 31, enters the first electrode 11 of the battery cell 1 through the first charging line 346 on the main body 342 of the flexible circuit board 34, then passes through the second electrode 14, the second electrode 14 passes through the gap 3410 to communicate with the third charging line 331 of the printed circuit board 33, and finally returns to the negative electrode of the first charging connector 31, forming a first loop; for the second charging connector 32, the current flows in from the positive electrode of the second charging connector 32, enters the first electrode 11 through the main body 342 of the flexible circuit board 34 and the second charging line 347 on the bridge part 343, then passes through the second electrode 14, the second electrode 14 passes through the gap 3410 to communicate with the fourth charging line 332 of the printed circuit board 33, and finally returns to the negative electrode of the second charging connector 32. Due to the existence of the bridge part 343 and the gap 3410, the two loops formed between the first electrode 11, the second electrode 14 and the two charging connectors do not have overlapping areas, thereby reducing charging heat.

[0053] like Figures 15 to 17 As shown, the thickness of the flexible circuit board 34 itself is very small, and the first charging connector 31 and the second charging connector 32 can be arranged on the flexible circuit board 34 to form a Figure 7The structure shown can reduce the overall thickness of the circuit board 3. The first charging connector 31 and the second charging connector 32 can also be arranged on the printed circuit board 33, but this will increase the overall thickness of the circuit board 3.

[0054] like Figures 7 to 14 As shown, the first charging connector 31 and the second charging connector 32 are provided on the flexible circuit board 34, and the flexible circuit board 34 needs to be bent. More specifically, the two ends of the first charging connector 31 and the second charging connector 32 need to face as shown in FIG. Fig.10 The printed circuit board 33 is bent at the rear, and the bridge portion 343 needs to be directed toward Fig.11 The printed circuit board 33 shown is bent at the bottom (due to Fig.11 This is a bottom view, so the bottom of the printed circuit board 33 is above the paper).

[0055] like Figure 5 and Figure 6 As shown, after the flexible circuit board 34 is bent, the circuit board 3 is connected to the battery cell 1, and at this time, the main body 342 and the bridge portion 343 are set at an angle, such as 90 degrees or 80 degrees or other suitable angles. At least part of the main body 342 abuts against the pole ear 15 of the battery cell 1, and at least part of the bridge portion 343 abuts against the end face 13 of the battery cell 1. The advantages of this structure are that, firstly, because there is no separate adapter plate, the overall thickness of the pole ear 15, the printed circuit board 33, and the flexible circuit board 34 can be reduced. Secondly, because the bridge portion 343 abuts against the end face 13 after bending, and the bridge portion 343 is a part of the flexible circuit board 34, the thickness is very small, so the increase in the height of the entire battery cell charging structure after folding can be basically ignored, so while avoiding the overlapping area of ​​the two circuits, it has the effect of reducing the overall size of the battery charging structure.

[0056] like Figure 6 As shown, the flexible circuit board 34 is provided with a connecting piece 35, and the connecting piece 35 has a first side wall 351 close to the main body 342 and a second side wall 352 away from the main body 342. The pole lug 15 of the battery cell 1 is inserted between the first side wall 351 and the second side wall 352. In actual production, the connecting piece 35 can be a flat plate, and after being welded with the pole lug 15, the connecting piece 35 is bent into a U shape, thereby forming a first side wall 351 and a second side wall 352, and the two side walls clamp the pole lug 15. This structure has the advantage of easy assembly.

[0057] like Figure 2 and Figure 6 As shown, the second side wall 352 is bonded to the top sealing structure 12 of the tab 15 by means of a double-sided adhesive tape 2. This structure has the advantage of being easy to assemble.

[0058] like Figure 6As shown, after the battery charging structure is assembled, at least part of the main body 342 is located between the printed circuit board 33 and the tab 15 of the battery cell 1, and at least part of the bridge portion 343 is located between the printed circuit board 33 and the end surface 13 of the battery cell 1. In this way, the printed circuit board 33 is used to press the flexible circuit board 34 in the height direction and thickness direction of the battery cell, which can ensure the stability and compactness of the entire structure.

[0059] like Figure 7 , Figures 9 to 15 , Fig.17 As shown, the flexible circuit board 34 also has an arm 341. The arm 341 is provided with a patch temperature sensor 36. The patch temperature sensor 36 can be, for example, a negative temperature coefficient thermistor, etc., which replaces the lead temperature sensor and does not require thermal conductive silicone grease, greatly reducing the device cost and manufacturing cost.

[0060] like Fig.15 and Fig.17 As shown, the flexible circuit board 34 has a first end 344 and a second end 345 .

[0061] like Figure 7 As shown, the first end 344 is connected to the first charging connector 31 , and the second end 345 is connected to the second charging connector 32 .

[0062] like Fig.10 As shown, after the flexible circuit board 34 is bent, the first end 344 and the second end 345 are close to each other, so that at least a portion of the printed circuit board 33 is surrounded by the main body 342 of the flexible circuit board 34. In one embodiment of the present application, the main body 342 of the flexible circuit board 34 is folded into an open ring. In other embodiments of the present application, the main body 342 of the flexible circuit board 34 can also be folded into a closed ring. At this time, the main body 342 of the flexible circuit board 34 will completely surround the printed circuit board 33. This structure of the circuit board 3 makes full use of the size space of the battery cell 1 in the thickness direction, and is particularly suitable for Fig.18 The arrangement of the charging circuit shown is simple and compact in structure.

[0063] like Figure 2 , Figure 4 and Figure 6 As shown, the battery charging structure of the embodiment of the present application further includes insulating paper 4. The insulating paper 4 at least wraps the printed circuit board 33, the flexible circuit board 34 and a portion of the tab 15 of the battery cell 1, and at least covers a portion of the top sealing structure 12 of the tab 15 of the battery cell 1. This structure can effectively prevent a short circuit between the circuit board 3 and the surrounding electrical components.

[0064] On the other hand, an embodiment of the present application further provides an electronic device, which includes the battery charging structure as described above. The electronic device can be a portable device such as a mobile phone, a tablet computer, a wearable device, etc. The electronic device has the advantages of fast charging, compact structure, and low heat dissipation during charging.

[0065] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery charging structure, characterized in that: include: A battery cell (1), the battery cell comprising a first electrode (11) and a second electrode (14); A circuit board (3), the circuit board (3) comprising a printed circuit board (33) and a flexible circuit board (34), the circuit board (3) being connected to a first charging connector (31) and a second charging connector (32); The flexible circuit board (34) includes a first charging circuit (346) connecting the first charging connector (31) and the first electrode (11), and a second charging circuit (347) connecting the second charging connector (32) and the first electrode (11); the printed circuit board (33) includes a third charging circuit (331) connecting the first charging connector (31) and the second electrode (14), and a fourth charging circuit (332) connecting the second charging connector (32) and the second electrode; The first charging circuit (346) and the third charging circuit (331) are used to form a first loop, and the second charging circuit (347) and the fourth charging circuit (332) are used to form a second loop.

2. The battery charging structure according to claim 1, characterized in that: The first charging connector (31) and the second charging connector (32) are located on the flexible circuit board (34); The flexible circuit board (34) further includes a fifth charging circuit (348) and a sixth charging circuit (349); the third charging circuit (331) is connected to the first charging connector (31) via the fifth charging circuit (348); and the fourth charging circuit (332) is connected to the second charging connector (32) via the sixth charging circuit (349).

3. The battery charging structure according to claim 1, characterized in that: The flexible circuit board (34) has a bridge portion (343) and a main body portion (342), and the first charging connector (31) and the second charging connector (32) are located in the main body portion (342) of the flexible circuit board (34); The first charging circuit (346) is connected to the first electrode (11) via the main body (342); The second charging circuit (347) is connected to the first electrode (11) via the main body (342) and the bridge portion (343); A gap (3410) is provided between the bridge portion (343) and the main body portion (342), and the second electrode (14) passes through the gap (3410) to be connected to the third charging circuit (331) and the fourth charging circuit (332).

4. The battery charging structure according to claim 3, characterized in that: The main body (342) and the bridge portion (343) are arranged at an angle, and at least a portion of the main body (342) abuts against the pole ear (15) of the battery cell (1), and at least a portion of the bridge portion (343) abuts against the end surface (13) of the battery cell (1).

5. The battery charging structure according to claim 3, characterized in that: The flexible circuit board (34) is provided with a connecting piece (35), the connecting piece (35) having a first side wall (351) close to the main body (342) and a second side wall (352) away from the main body (342), and the tab (15) of the battery cell (1) is inserted between the first side wall (351) and the second side wall (352).

6. The battery charging structure according to claim 5, characterized in that: The second side wall (352) is bonded to the top sealing structure (12) of the electrode tab (15) by means of a double-sided adhesive tape (2).

7. The battery charging structure according to claim 3, characterized in that: At least part of the main body (342) is located between the printed circuit board (33) and the pole ear (15) of the battery cell (1), and at least part of the bridge portion (343) is located between the printed circuit board (33) and the end surface (13) of the battery cell (1).

8. The battery charging structure according to claim 3, characterized in that: The flexible circuit board (34) also has an arm portion (341), and the arm portion (341) is provided with a patch-type temperature sensor (36).

9. The battery charging structure according to claim 1, characterized in that: The flexible circuit board (34) has a first end (344) and a second end (345), the first end (344) is connected to the first charging connector (31), and the second end (345) is connected to the second charging connector (32); the first end (344) and the second end (345) are close to each other so that at least a portion of the printed circuit board (33) is surrounded by the main body (342) of the flexible circuit board (34).

10. The battery charging structure according to claim 1, characterized in that: It also includes insulating paper (4), wherein the insulating paper (4) at least wraps the printed circuit board (33), the flexible circuit board (34) and a portion of the pole lug (15) of the battery cell (1), and at least covers a portion of the top sealing structure (12) of the pole lug (15) of the battery cell (1).

11. An electronic device, characterized in that: include: A battery charging structure as claimed in any one of claims 1 to 10.

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