Battery protection board, battery and electronic equipment

Abstract

The utility model relates to a battery protection board, a battery and electronic equipment. The battery protection board comprises a flexible circuit board; a plurality of positive electrode connectors, wherein the plurality of positive electrode connectors are electrically connected to the flexible circuit board; the negative electrode connector is electrically connected to the flexible circuit board; the positive electrode end is electrically connected to the flexible circuit board, the positive electrode end is electrically connected with the plurality of positive electrode connectors respectively, and the positive electrode end is used for being electrically connected with the positive electrode of a battery cell; and the negative and positive electrode end is electrically connected to the flexible circuit board, the negative electrode end is used for being electrically connected with a negative electrode of a battery cell, and the negative electrode end is electrically connected with the negative electrode connector.

Description

Technical Field

[0001] The present disclosure relates to the technical field of terminals, and particularly to a battery protection board, a battery, and an electronic device. Background Art

[0002] With the increase in the battery capacity of electronic devices such as mobile phones, high-power fast charging technology has become a conventional configuration function of electronic devices such as mobile phones.

[0003] In a related art, two positive nickel plates connected to the positive nickel plate of the same battery cell are provided on a battery protection board. The two positive nickel plates are respectively connected to two positive connectors, and the two positive nickel plates are electrically connected through an internal circuit of a circuit board provided on the battery protection board, and then transmitted to the positive electrode tab of the same battery cell.

[0004] In this related art, the positive nickel plates are electrically connected through the internal circuit of the circuit board. On the one hand, it increases the complexity of the internal circuit of the circuit board, and on the other hand, it also increases the internal impedance of the circuit board. Utility Model Content

[0005] The present disclosure provides a battery protection board, a battery, and an electronic device to solve the deficiencies in the related art.

[0006] According to a first aspect of an embodiment of the present disclosure, a battery protection board is provided, including:

[0007] A flexible circuit board;

[0008] A plurality of positive connectors, the plurality of positive connectors being electrically connected to the flexible circuit board;

[0009] A negative connector, the negative connector being electrically connected to the flexible circuit board;

[0010] A positive terminal, the positive terminal being electrically connected to the flexible circuit board, the positive terminal being respectively electrically connected to the plurality of positive connectors, and the positive terminal being used for electrically connecting to the positive electrode of a battery cell;

[0011] A negative terminal, the negative positive terminal being electrically connected to the flexible circuit board, the negative terminal being used for electrically connecting to the negative electrode of a battery cell, and the negative terminal being electrically connected to the negative connector.

[0012] Optionally, the positive terminal includes a first positive electrode, a second positive electrode, and a shunt wire electrically connecting the first positive electrode and the second positive electrode. The first positive electrode or the second positive electrode is electrically connected to the positive electrode of the battery cell, and the shunt wire is arranged independently of the flexible circuit board.

[0013] Optionally, it further includes a rigid circuit board, the flexible circuit board is disposed around the rigid circuit board, the first positive electrode and the second positive electrode are located on a side of the flexible circuit board away from the rigid circuit board, the rigid circuit board includes a card slot; a part of the shunt wire is embedded in the card slot.

[0014] Optionally, the rigid circuit board includes a first side surface and a second side surface perpendicular to the first side surface, the first positive electrode and the second positive electrode are disposed corresponding to the first side surface, and the card slot is recessed inward from the second side surface.

[0015] Optionally, the positive electrode end includes a metal sheet positive electrode, and the metal sheet positive electrode is electrically connected to the positive electrode of the battery cell.

[0016] Optionally, the metal sheet positive electrode includes a first sheet portion and a second sheet portion bent and connected to the first sheet portion;

[0017] The battery protection board further includes a rigid circuit board, the flexible circuit board is disposed around the rigid circuit board, and a part of the flexible circuit board is attached between the first sheet portion and the rigid circuit board, and the second sheet portion is attached to the rigid circuit board.

[0018] Optionally, the rigid circuit board includes an avoidance groove, and the second sheet portion is attached in the avoidance groove.

[0019] Optionally, the first sheet portion and / or the second sheet portion includes an overlapping area, and the overlapping area is arranged in multiple layers.

[0020] According to a second aspect of the embodiments of the present disclosure, there is provided a battery, including:

[0021] A battery cell, the battery cell includes a positive electrode and a negative electrode;

[0022] The battery protection board as described in any one of the foregoing embodiments, the negative electrode end of the battery protection board is electrically connected to the negative electrode, and the positive electrode end is electrically connected to the positive electrode.

[0023] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, including the battery as described in any one of the foregoing embodiments.

[0024] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0025] As can be seen from the above embodiments, on the one hand, in the present disclosure, the positive electrode end can be electrically connected to a plurality of positive electrode connectors to achieve the effect of charging through multiple charging circuits; on the other hand, the contacts on the positive electrode end that are electrically connected to the plurality of positive electrode connectors are electrically connected through the positive electrode end itself independent of the flexible circuit board. In other words, the multiple contacts are electrically connected through an external circuit independent of the flexible circuit board, which helps to reduce the internal impedance of the flexible circuit board and simplify the internal circuit of the flexible circuit board.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0028] Figure 1 is a schematic structural diagram of a battery protection board shown according to an exemplary embodiment.

[0029] Figure 2 is a schematic structural diagram of a positive electrode end shown according to an exemplary embodiment.

[0030] Figure 3 is a schematic structural diagram of another positive electrode end shown according to an exemplary embodiment.

[0031] Figure 4 is a schematic structural diagram of a battery shown according to an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "the" and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0035] Figure 1 is a schematic diagram of the structure of a battery protection board according to an exemplary embodiment. Figure 1 As shown, the battery protection board includes a flexible circuit board 1, multiple positive connectors 2, a negative connector (not shown in the figure), a positive terminal 3 and a negative terminal 4. Among them, the flexible circuit board 1 can be provided with many internal circuits to realize the circuit protection function of the battery protection board. The positive connector 2 can be a connector, and the positive connector 2 can be used to be electrically connected to the mainboard of the electronic device to which it belongs, and further electrically connected to the positive pole of the external charging connector. Multiple positive connectors 2 can use the same connector or different connectors, which can be specifically designed as needed. Similarly, the negative connector can also be used to be electrically connected to the mainboard of the electronic device to which it belongs, and further electrically connected to the negative pole of the external charging connector.

[0036] The positive terminal 3 is electrically connected to the flexible circuit board 1, for example, it can be electrically connected to the pad of the flexible circuit board 1 by welding, and the positive terminal 3 is electrically connected to multiple positive connectors 2 respectively, so that multiple charging circuits can be formed, the current of each charging circuit can be reduced, and the charging safety performance can be improved. The positive terminal 3 is also electrically connected to the positive electrode of the battery cell. The negative terminal 4 is electrically connected to the flexible circuit board 1, for example, it can be electrically connected to the pad of the flexible circuit board 1 by welding, and the negative terminal 4 is respectively connected to the negative connector and the negative electrode of the battery cell, so that a charging circuit from positive connector 2-positive terminal 3-battery cell positive electrode-battery cell negative electrode-negative terminal 4-negative connector can be realized.

[0037] It can be seen from the above embodiments that in the present disclosure, on the one hand, the positive terminal 3 can be electrically connected to multiple positive connectors 2 to achieve the effect of charging in multiple charging circuits; on the other hand, the contacts on the positive terminal 3 that are electrically connected to multiple positive connectors 2 are electrically connected through the positive terminal 3 itself that is independent of the flexible circuit board 1. In other words, the multiple contacts are electrically connected through an external circuit independent of the flexible circuit board 1, which is beneficial to reducing the internal impedance of the flexible circuit board 1.

[0038] In some instances, Figure 1As shown, the positive terminal 3 includes a first positive electrode 31, a second positive electrode 32 and a shunt wire 33 electrically connected to the first positive electrode 31 and the second positive electrode 32. The first positive electrode 31 is electrically connected to the positive electrode of the battery cell. The charging current of the second positive electrode 32 can be merged into the first positive electrode 31 through the shunt wire 33, and then input to the positive electrode of the battery cell. The shunt wire 33 is independently arranged from the flexible circuit board 1 to form an external circuit independent of the flexible circuit board 1, thereby reducing the internal impedance of the flexible circuit board 1. In other examples, the second positive electrode 32 can also be electrically connected to the positive electrode of the battery cell.

[0039] Furthermore, the battery protection board also includes a hard circuit board 5, which is electrically connected to the flexible circuit board 1, for example, by SMT (Surface Mounted Technology), and electronic devices can be connected to the hard circuit board 5, and the flexible circuit board 1 is arranged around the hard circuit board 5. The first positive electrode 31 and the second positive electrode 32 are located on the side of the flexible circuit board 1 away from the hard circuit board 5, and the hard circuit board 5 includes a card slot 51, and the shunt wire 33 can be partially embedded in the card slot 51, so that on the one hand, a neat appearance can be achieved, and on the other hand, it is conducive to reducing the overall volume of the battery protection board.

[0040] The rigid circuit board 5 includes a first side surface and a second side surface perpendicular to each other. The first positive electrode 31 and the second positive electrode 32 are both arranged corresponding to the first side surface, that is, a part of the flexible circuit board 1 is arranged between the first positive electrode 31 and the first side surface of the rigid circuit board 5, and a part of the flexible circuit board 1 is arranged between the second positive electrode 32 and the first side surface of the rigid circuit board 5; the card slot 51 is formed by being recessed inward from the second side surface, and the shunt wire 33 partially embedded in the card slot 51 can be bent and then electrically connected to the first positive electrode 31 and the second positive electrode 32 respectively.

[0041] In other embodiments, Figure 2 As shown, the positive terminal 3 may include a metal sheet positive electrode, that is, the positive terminal 3 is stacked in a sheet structure on the flexible circuit board 1, and the metal sheet positive electrode may be provided with a plurality of contacts connected to a plurality of positive electrode connectors 2 through the internal circuit of the flexible circuit board 1 in a one-to-one correspondence. The metal sheet positive electrode is also electrically connected to the positive electrode of the battery cell. The scheme of using a metal sheet positive electrode as the positive terminal 3, on the one hand, uses an external circuit independent of the flexible circuit board 1 to connect a plurality of contacts electrically connected to the positive electrode connector 2, thereby reducing the internal impedance of the flexible circuit board 1, and on the other hand, compared with the scheme of using a shunt wire, it can simplify the assembly steps.

[0042] In some embodiments, the metal sheet positive electrode includes a first sheet portion 34 and a second sheet portion 35. The first sheet portion 34 is connected to the second sheet portion 35, and the first sheet portion 34 is bent relative to the second sheet portion 35. The battery protection board further includes a rigid circuit board 5. The flexible circuit board 1 is disposed around the rigid circuit board 5. A part of the flexible circuit board 1 is attached between the first sheet portion 34 and the rigid circuit board 5, and the second sheet portion 35 is attached to the rigid circuit board 5. On the one hand, this can reduce the internal impedance of the flexible circuit board 1. On the other hand, the second sheet portion 35 of the metal sheet positive electrode can increase the area of the metal sheet positive electrode to further reduce the impedance. Moreover, by attaching the second sheet portion 35 to the rigid circuit board 5, the rigid circuit board 5 can also be protected.

[0043] Among them, the area of the second sheet portion 35 can be adjusted according to requirements. For example, Figure 2 As shown in, the length dimension of the second sheet portion 35 is equal to the length dimension of the first sheet portion 34, or as Figure 3 shown, the second sheet portion 35 can be shorter than the first sheet portion 34. And to achieve the electrical connection between the first sheet portion 34 and the plurality of positive connectors 2, as Figure 3 shown in, the first sheet portion 34 can be provided with a plurality of strips, and the plurality of strips are electrically connected to the pads of the flexible circuit board 1, and then electrically conduct with the plurality of positive connectors 2 through the internal circuit of the flexible circuit board 1.

[0044] To reduce the volume of the battery protection board, the rigid circuit board 5 can further include an avoidance groove, and the second sheet portion 35 can be accommodated in the avoidance groove. In this way, the area of the metal sheet positive electrode can be increased again, and while reducing the internal impedance of the flexible circuit board, the increase of the battery protection board can be reduced. And because increasing the area of the positive electrode end 3 can reduce the internal impedance of the flexible circuit board 1, as Figure 3 and Figure 4 shown, the first sheet portion 34 can include an overlapping area, and the overlapping area can be arranged in multiple layers. In this way, while increasing the unfolded area of the metal sheet positive electrode, the area requirement when it is electrically connected to the flexible circuit board 1 can be reduced. Of course, in other embodiments, the second sheet portion 35 can also include an overlapping area, and the present disclosure does not limit this.

[0045] Based on the technical solution of the present disclosure, as Figure 4 shown, a battery is further provided. The battery includes a battery cell 101 and the battery protection board described in any one of the foregoing embodiments. The negative electrode end 4 of the battery protection board is electrically connected to the negative electrode of the battery cell 101, and the positive electrode end 3 is electrically connected to the positive electrode of the battery cell 101, thereby forming a current loop to achieve charging. The battery protection board can be bonded to the battery cell 101 by double-sided tape to relatively fix the battery cell 101 and the battery protection board in terms of their positional relationship.

[0046] Based on the technical solution of the present disclosure, an electronic device is further provided. The electronic device includes the battery described in any one of the foregoing embodiments. The electronic device may include a mobile phone terminal, a tablet terminal, a wearable device, and the like.

[0047] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the disclosure herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0048] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A battery protection board, characterized in that: include: Flexible circuit boards; A plurality of positive electrode connectors, wherein the plurality of positive electrode connectors are electrically connected to the flexible circuit board; the positive electrode connector is used to be electrically connected to the positive electrode of the mainboard of the electronic device to which it belongs; A negative electrode connector, the negative electrode connector is electrically connected to the flexible circuit board; the negative electrode connector is used to be electrically connected to the negative electrode of the mainboard of the electronic device; A positive terminal, the positive terminal is electrically connected to the flexible circuit board, the positive terminal is electrically connected to the plurality of positive connectors respectively, and the positive terminal is used to be electrically connected to the positive electrode of the battery cell; A negative terminal, the negative terminal is electrically connected to the flexible circuit board, the negative terminal is used to be electrically connected to the negative electrode of the battery cell, and the negative terminal is electrically connected to the negative electrode connector.

2. The battery protection board according to claim 1, characterized in that: The positive terminal includes a first positive electrode, a second positive electrode and a shunt wire electrically connecting the first positive electrode and the second positive electrode, the first positive electrode or the second positive electrode is electrically connected to the positive electrode of the battery cell, and the shunt wire guide is set independently of the flexible circuit board.

3. The battery protection board according to claim 2, characterized in that: It also includes a hard circuit board, the flexible circuit board is arranged around the hard circuit board, the first positive electrode and the second positive electrode are located on the side of the flexible circuit board away from the hard circuit board, and the hard circuit board includes a slot; the shunt wire is partially embedded in the slot.

4. The battery protection board according to claim 3, characterized in that: The rigid circuit board includes a first side surface and a second side surface vertically arranged to the first side surface, the first positive electrode and the second positive electrode are arranged corresponding to the first side surface, and the card slot is recessed inwardly from the second side surface.

5. The battery protection board according to claim 1, characterized in that: The positive terminal includes a metal sheet positive electrode, and the metal sheet positive electrode is electrically connected to the positive electrode of the battery cell.

6. The battery protection board according to claim 5, characterized in that: The metal sheet positive electrode comprises a first sheet portion and a second sheet portion which is bent and connected to the first sheet portion; The battery protection board also includes a hard circuit board, the flexible circuit board is arranged around the hard circuit board, and a part of the flexible circuit board is attached between the first sheet portion and the hard circuit board, and the second sheet portion is attached to the hard circuit board.

7. The battery protection board according to claim 6, characterized in that: The rigid circuit board comprises an avoidance groove, and the second sheet portion is attached to the avoidance groove.

8. The battery protection board according to claim 6, characterized in that: The first sheet portion and / or the second sheet portion include an overlapping area, and the overlapping area is arranged in multiple layers.

9. A battery, characterized in that: include: A battery cell, the battery cell comprising a positive electrode and a negative electrode; The battery protection board according to any one of claims 1 to 8, wherein the negative terminal of the battery protection board is electrically connected to the negative electrode, and the positive terminal is electrically connected to the positive electrode.

10. An electronic device, characterized in that: Comprising the battery as claimed in claim 9.

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