Battery protection circuit and electronic device

Abstract

The application discloses a battery protection circuit and an electronic device. The battery comprises a battery cell and two flexible circuit boards. Two electrodes are arranged on one side surface of the battery cell. The two flexible circuit boards are arranged on the side of the battery cell where the electrodes are located. Each flexible circuit board comprises a flexible plate body and a connecting line. The connecting line is arranged on the flexible plate body. The flexible plate body is electrically connected to the electrodes through the connecting line. The connecting line on at least one flexible plate body is one. The battery and the electronic device provided by the application can effectively reduce the wiring impedance on the flexible circuit board and the battery protection plate under the condition of meeting the miniaturized design of the electronic device, so that the heat loss of the flexible circuit board and the battery protection plate during the charging and discharging process of the battery cell can be reduced.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a battery protection circuit and electronic equipment. Background Technology

[0002] In related technologies, most electronic devices include a battery and a motherboard, with the battery typically connected to the motherboard via a flexible printed circuit (FPC).

[0003] With the continuous development of electronic technology, the trend towards thinner and smaller structures has gradually become the development trend of electronic devices. However, meeting the design trend of thinner and smaller electronic devices leads to a narrower linewidth for the positive and negative electrode traces on the FPC, resulting in higher impedance of the positive and negative electrode traces, which in turn leads to greater heat loss of the FPC during battery charging and discharging. Utility Model Content

[0004] This application discloses a battery protection circuit and electronic device that can reduce the trace impedance on the flexible circuit board and battery protection board while meeting the miniaturization design requirements of electronic devices, thereby effectively reducing the heat loss of the flexible circuit board and battery protection board during the charging and discharging process of the battery cell.

[0005] To achieve the above objectives, the first aspect of this application discloses a battery, wherein the battery protection circuit is disposed in an electronic device, and the battery protection circuit includes:

[0006] A battery cell, wherein two electrodes are provided on one side surface of the battery cell; and,

[0007] Two flexible circuit boards are disposed on the side of the electrode of the battery cell, and each flexible circuit board includes a flexible plate and a connecting line. The connecting line is disposed on the flexible plate and is electrically connected to the electrode. At least one connecting line on the flexible plate is a single line.

[0008] The second aspect of this application discloses an electronic device, which includes a motherboard and a battery protection circuit as described in the first aspect above. Two flexible circuit boards are disposed between the motherboard and the battery cell. The motherboard is electrically connected to one of the electrodes through one of the flexible circuit boards, and the motherboard is electrically connected to the other electrode through the other flexible circuit board.

[0009] The third aspect of this application discloses an electronic device, which includes a motherboard, a protection circuit, and a battery protection circuit as described in the first aspect above. The protection circuit is disposed on the motherboard, and two flexible circuit boards are disposed between the motherboard and the battery cell. One electrode is connected to the protection circuit through one of the flexible circuit boards, and the other electrode is connected to the motherboard through the other flexible circuit board.

[0010] Compared with the prior art, the beneficial effects of this application are as follows:

[0011] The battery protection circuit and electronic device provided in this application embodiment have two electrodes of the battery cell electrically connected to the main board via a flexible circuit board. Each flexible circuit board includes a flexible plate and connecting lines. By making the connecting line on at least one of the two flexible plates a single line, the line width of the connecting line can be set to be relatively large, even close to the width of the flexible plate. This allows the line width of the connecting line to be increased without changing the width of at least one flexible circuit board (flexible plate). This reduces the impedance of the connecting lines on the flexible circuit board while meeting the requirements of the battery's thin and miniaturized design, thereby effectively reducing the heat loss of the flexible circuit board during the charging and discharging process of the battery cell.

[0012] In addition, when the battery protection circuit includes a battery protection board, combined with the design of only one connecting line on the flexible board, and to avoid short circuits, the positive or negative terminal of the battery cell is generally not electrically connected to the connecting line on the same flexible board. This makes the wiring on the battery protection board cleaner and reduces the number of wirings on the battery protection board, thereby increasing the wiring width on the battery protection board. This effectively reduces the wiring impedance of the battery protection board and the flexible circuit board, and reduces the heat loss of the battery protection board and the flexible circuit board during the charging and discharging process of the battery cell. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 It is the circuit structure diagram of the first electronic device in the related technology;

[0015] Figure 2 This is a circuit diagram of the second type of electronic device in the related technology;

[0016] Figure 3This is a schematic diagram of the structure of the electronic device disclosed in the embodiments of this application;

[0017] Figure 4 This is an exploded structural diagram of the electronic device disclosed in the embodiments of this application;

[0018] Figure 5 This is a schematic diagram of the internal structure of the electronic device provided in the embodiments of this application;

[0019] Figure 6 This is a schematic diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0020] Figure 7 This is a first circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0021] Figure 8 This is a second circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0022] Figure 9 This is a third circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0023] Figure 10 This is a fourth circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0024] Figure 11 This is a fifth circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0025] Figure 12 This is a sixth circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0026] Figure 13 This is a seventh circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0027] Figure 14 This is the eighth circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0028] Figure 15 This is the ninth circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0029] Figure 16 This is the tenth circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0030] Figure 17 This is the eleventh circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application;

[0031] Figure 18 This is the twelfth circuit structure diagram of the battery protection circuit and motherboard provided in the embodiments of this application.

[0032] Explanation of main figure symbols

[0033] A - Trajectory; A1 - Positive trace; A2 - Negative trace; B - Connecting trace;

[0034] 100 - Electronic device; 10 - Housing; 11 - Display screen; 12 - Mid-frame; 13 - Back cover; 14 - Through hole;

[0035] 20-Battery protection circuit; 21-Battery cell; 211-Electrode; 211a-First electrode; 211b-Second electrode; 22-Flexible circuit board; 22a-First flexible circuit board; 22b-Second flexible circuit board; 221-Flexible board body; 221a-First flexible board body; 221b-Second flexible board body; 222-Connecting wire; 222a-First connecting wire; 222b-Second connecting wire; 23-First connector; 24-Battery protection board; 241-Protection circuit; 2411-Resistor; 2412-Protection switch; 2413-Protection chip; 2414-Fuel meter module; 242-Conductive wire;

[0036] 30-Main board; 31-Charging circuit; 32-Second connector; 40-Sub-board; 41-Charging port. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments. That is, the specific embodiments described herein are merely used to explain this application and are not intended to limit this application.

[0038] It should be noted that the brief descriptions of terminology used in this application are merely for the purpose of facilitating understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0039] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] The terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first flexible circuit board may be referred to as a second flexible circuit board, and similarly, a second flexible circuit board may be referred to as a first flexible circuit board. Both the first flexible circuit board and the second flexible circuit board are flexible circuit boards, but they are not the same flexible circuit board.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In the description of this application, it should be noted that the singular forms of "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that terms such as "comprising / including" or "having" specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof.

[0044] In addition, the term "and / or" as used in this specification includes any and all combinations of the related listed items. For example, A and / or B can mean: A alone, A and B together, or B alone. That is, the term "and / or" as used in this specification includes any and all combinations of the related listed items.

[0045] With the continuous development of electronic technology, the functions of electronic devices such as smartphones and tablets have become increasingly powerful, and they have become an important part of people's lives and entertainment. Furthermore, the thin and light miniaturized structure has gradually become a development trend for electronic devices.

[0046] like Figure 1 As shown, in related technologies, most electronic devices include a battery cell 21 and a motherboard 30. The battery cell 21 is usually connected to the motherboard 30 via a flexible printed circuit (FPC) 22. The flexible printed circuit 22 is usually located on the side of the battery cell 21 along its length. The width of the flexible printed circuit 22 generally does not exceed the thickness of the battery cell 21. In general, the width of the flexible printed circuit 22 is usually about equal to the thickness of the battery cell 21.

[0047] The commercially available flexible circuit board 22 consists of one circuit board with two traces A. One trace A is the positive trace A1, used to electrically connect the positive terminal of the battery cell 21 to the main board 30, and the other is the negative trace A2, used to electrically connect the negative terminal of the battery cell 21 to the main board 30. Because the flexible circuit board 22 requires two traces A, and its width is limited by the thickness of the battery cell 21, the width of the flexible circuit board 22 is typically small. This results in limited space allocated to each trace A, leading to narrower trace widths and higher impedance. Consequently, the flexible circuit board 22 experiences greater heat loss during the charging and discharging process of the battery cell 21.

[0048] Increasing the width of the flexible circuit board 22 increases the space for the trace A, allowing for a larger trace width and thus reducing heat loss during the charging and discharging of the battery cell 21. However, increasing the width of the flexible circuit board 22 leads to an increase in the thickness of the battery cell 21, which is detrimental to its application in thin and lightweight miniaturized electronic devices.

[0049] In order to overcome the above problems, the applicant attempted to increase the number of flexible circuit boards 22 to reduce the current flowing through each trace A on the flexible circuit board 22 by shunting the current, thereby reducing the heat loss of the flexible circuit board 22 during the charging and discharging process of the battery.

[0050] Specifically, such as Figure 2 As shown, there are two flexible circuit boards 22. Each flexible circuit board 22 is provided with a positive electrode trace A1 and a negative electrode trace A2. The positive electrode trace A1 on each flexible circuit board 22 is electrically connected to the positive electrode of the battery cell 21, and the negative electrode trace A2 on each flexible circuit board 22 is electrically connected to the negative electrode of the battery cell 21. This allows the current flowing through each flexible circuit board 22 to be diverted, thereby reducing the current flowing through each trace A on the flexible circuit board 22 and thus reducing the heat loss of the flexible circuit board 22 during the charging and discharging process of the battery cell 21.

[0051] In some embodiments of this utility model application, when the positive and negative terminals of the battery cell 21 are connected to two flexible circuit boards 22 through the battery protection board 24, the battery protection board 24 needs to be provided with four connection lines B. The positive terminal of the battery cell 21 is electrically connected to the positive terminal line A1 on the two flexible circuit boards 22 through two of the connection lines B, and the negative terminal of the battery cell 21 is electrically connected to the negative terminal line A2 on the two flexible circuit boards 22 through the other two connection lines B.

[0052] In the above scheme, the number of connection traces B on the battery protection board 24 is relatively large. However, the width of the battery protection board 24 is limited by the thickness of the battery cell 21, which makes the arrangement space allocated to each connection trace B on the battery protection board 24 limited. This results in the connection traces B on the battery protection board 24 having a relatively narrow line width, which may lead to a large impedance of the connection traces B on the battery protection board 24, thereby increasing the heat loss of the battery protection board 24 during the charging and discharging process of the battery cell 21.

[0053] In view of this, another embodiment of this application provides a battery protection circuit and electronic device that can reduce the impedance of traces on a flexible circuit board while meeting the miniaturization design requirements of electronic devices, thereby effectively reducing the heat loss of the flexible circuit board during the charging and discharging process of the battery cell.

[0054] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] Please see Figure 3 , Figure 3 The accompanying drawings show that the electronic device in this application is a smartphone, but it is understood that the accompanying drawings are only provided as an example of the electronic device 100 being a smartphone, and do not limit the electronic device 100 in this application to being only a smartphone.

[0056] In other implementations of this application, the electronic device 100 may also be a laptop computer, tablet computer, television, smart wearable device (such as a smart watch, smart wristband, smart glasses, earphone, etc.), personal digital assistant (PDA), e-book reader, or other electronic products with charging and energy storage functions. This application does not specifically limit this.

[0057] It should be understood that when the electronic device 100 adopts a smartphone, the electronic device 100 can be a regular mobile phone or a foldable mobile phone. This application does not specifically limit the specific form of the electronic device 100.

[0058] To facilitate the explanation of the positions of various components in the electronic device 100, this application embodiment establishes a three-dimensional coordinate system based on the electronic device 100, wherein the x-axis direction is the length direction of the electronic device 100, the y-axis direction is the width direction of the electronic device 100, and the z-axis direction is the thickness direction of the electronic device 100.

[0059] Please see Figure 4 , Figure 4 This is an exploded structural diagram of an electronic device in a specific embodiment. The electronic device 100 provided in this application embodiment may include a housing 10, which is mainly used to fix and protect the electronic devices or structures disposed inside the housing 10.

[0060] Wherein, the length direction of the housing 10 is the length direction of the electronic device 100, the width direction of the housing 10 is the width direction of the electronic device 100, and the thickness direction of the housing 10 is the thickness direction of the electronic device 100.

[0061] Optionally, the housing 10 may include a display screen 11, a middle frame 12, and a rear cover 13 arranged sequentially along its thickness direction. One side of the middle frame 12 surrounds the edge of the display screen 11, and the other side of the middle frame 12 surrounds the edge of the rear cover 13, forming a complete external structure of the electronic device 100. The display screen 11, the middle frame 12, and the rear cover 13 form the internal space of the electronic device 100. In this embodiment, the middle frame 12 and the rear cover 13 may be separate structures or integrated structures.

[0062] In some embodiments, the electronic device 100 provided in this application further includes a battery protection circuit 20, a main board 30, and a sub-board 40. The battery protection circuit 20, main board 30, and sub-board 40 are all disposed within the internal space of the housing 10, and can be mounted on the middle frame 12 so that the middle frame 12 can provide support and protection for the various electronic components inside the electronic device 100. Furthermore, the main board 30, battery protection circuit 20, and sub-board 40 can be arranged sequentially along the length of the electronic device, with the main board 30 electrically connected to both the battery protection circuit 20 and the sub-board 40.

[0063] It should be noted that, in the implementation of this application, Figure 4 This description uses only the example of an electronic device 100 internally equipped with a battery protection circuit 20, a main board 30, and a sub-board 40 as an example, and does not limit the electronic device 100 of this application to only having a battery protection circuit 20, a main board 30, and a sub-board 40. In other implementations of this application, the electronic device 100 may also internally be equipped with a camera module, a microphone, a fingerprint module, a SIM card tray, and various sensors, etc., and this application does not specifically limit this.

[0064] Those skilled in the art will understand that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 100. In other possible embodiments of this application, the electronic device 100 may include fewer or more components than those listed above, or combine or split certain components, or have different component arrangements.

[0065] Please see Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the internal structure of an electronic device in one exemplary embodiment. Figure 6 This is a schematic diagram of the battery protection circuit and the motherboard in one exemplary embodiment. The battery protection circuit 20 includes a battery cell 21.

[0066] Please see Figure 4 The casing 10 provided in this embodiment has a through hole 14 communicating with its internal and external spaces. The main board 30 is electrically connected to the battery protection circuit 20. The sub-board 40 is provided with a charging port 41 electrically connected to the main board 30. The charging port 41 is located at the through hole 14 so that the charger can be inserted into the charging port 41 to charge the battery cell 21 of the battery protection circuit 20. The charging port 41 can be a USB Type-C interface, a Micro USB interface, or a Lightning interface. This application does not specifically limit it.

[0067] Therefore, in the case of wired charging of battery cell 21, the charger is inserted into the charging port 41, and external current enters from the charging port 41, sequentially reaching the sub-board 40, the main board 30, and then the battery cell 21 in the battery protection circuit 20 via the main board 30, thereby charging battery cell 21. This charging process can be either fast charging or normal charging; this application does not specifically limit it. For battery cells 21 of the same capacity, the time required to fully charge battery cell 21 through fast charging is shorter than the time required to fully charge battery cell 21 through normal charging.

[0068] Optionally, the main board 30 is provided with a charging circuit 31, such as a charge pump circuit. The charging circuit 31 is electrically connected to the battery protection circuit 20 and the charging port 41 respectively. When the battery cell 21 is wired charged, the charger is inserted into the charging port 41 of the sub-board 40. The external current enters from the charging port 41 on the sub-board 40, reaches the sub-board 40 and the main board 30 in sequence, and reaches the battery cell 21 of the battery protection circuit 20 through the charging circuit 31 to realize the charging of the battery cell 21.

[0069] The charging circuit 31 is mainly used to convert electrical signals to DC / DC. It may include at least one of a buck converter circuit, a boost converter circuit, a boost-buck converter circuit, and a switched capacitor circuit.

[0070] In some embodiments, please refer to Figure 6 and Figure 7 The battery protection circuit 20 provided in this application embodiment includes two flexible circuit boards 22. Two electrodes 211 are provided on one side of the battery cell 21. The two flexible circuit boards 22 are disposed between the main board 30 and the battery cell 21. Each flexible circuit board 22 includes a flexible plate body 221 and a connecting line 222. The connecting line 222 is disposed on the flexible plate body 221 and is electrically connected to the electrode 211. The electrode 211 is electrically connected to the main board 30 through the connecting line 222.

[0071] Specifically, one of the two electrodes 211 is the positive electrode, and the other electrode 211 is the negative electrode. In the accompanying drawings, the positive electrode of the battery cell 21 is represented by the symbol "+", and the negative electrode is represented by the symbol "-". The positive electrode is electrically connected to the charging circuit 31 of the main board 30 via one of the connecting lines 222, and the negative electrode is electrically connected to the ground terminal of the main board 30 via the other connecting line 222. For example, when the battery cell 21 is wired charged, the charger is inserted into the charging port 41. External current enters from the charging port 41, sequentially reaches the sub-board 40 and the main board 30, and then reaches the positive electrode of the battery cell 21 via the charging circuit 31 and one of the connecting lines 222. The current enters the battery cell 21 and is stored therein. Thus, the battery cell 21 can serve as a storage component in the battery protection circuit 20, used to store electrical energy; simultaneously, the battery cell 21 can also release electrical energy to provide the power required for the operation of electronic devices.

[0072] Optionally, the number of battery cells 21 can be one or more, such as two, three, four, five or more. When there are multiple battery cells 21, they can be connected in parallel or in series.

[0073] When multiple battery cells 21 are connected in parallel, the positive terminals of the multiple battery cells 21 are electrically connected to the charging circuit 31 of the motherboard 30 through one of the connecting lines 222, and the negative terminals of the multiple battery cells 21 are electrically connected to the ground terminal of the motherboard 30 through another connecting line 222.

[0074] When multiple battery cells 21 are connected in series, the positive terminal of one battery cell 21 is electrically connected to the charging circuit 31 of the motherboard 30 through one of the connecting lines 222, and the negative terminal of another battery cell 21 is electrically connected to the ground terminal of the motherboard 30 through another connecting line 222.

[0075] Based on the material of the cell casing, the cell 21 can be an aluminum-cased cell or a pouch cell (also known as a polymer cell). Based on the shape of the cell 21, the cell 21 can be a square cell, such as a rectangular cell or a square cell.

[0076] In this application, the length direction of the battery cell 21 extends along the length direction of the housing, the width direction of the battery cell 21 extends along the width direction of the housing, and the thickness direction of the battery cell 21 extends along the thickness direction of the housing. For example, the length direction of the battery cell 21 may be... Figure 6 In the x-axis direction, the width direction of cell 21 can be... Figure 6 In the y-axis direction, the thickness direction of cell 21 can be... Figure 6 The z-axis direction in the equation.

[0077] In some embodiments, two electrodes 211 are arranged along the width direction of the cell 21 on the side of the cell 21 in its length direction, and the two electrodes 211 are located between the cell 21 and the main board 30. Two flexible circuit boards 22 are disposed on the side of the cell 21 in its length direction, that is, the two electrodes 211 and the two flexible circuit boards 22 are located on the same side of the cell 21, so that the two electrodes 211 are electrically connected to the main board 30 through the connecting line 222 of the flexible circuit board 22.

[0078] In some embodiments, such as Figures 7 to 10 As shown, at least one connecting line 222 is present on at least one flexible plate 221.

[0079] Understandably, when there are two traces A on the flexible circuit board 22, such as Figure 1 and Figure 2 As shown, to avoid short circuits caused by direct contact between two traces A, the two traces A are usually spaced apart, meaning there needs to be a certain gap between them. This makes the line width of each trace A smaller than half the width of the flexible circuit board 22. For example, if the line width of trace A is d1 and the width of the flexible circuit board 22 is d2, then d1 < d2 / 2. Moreover, as the number of traces A increases, the line width of trace A becomes smaller.

[0080] By adopting the technical solution of this application embodiment, since at least one flexible plate 221 has a connecting line 222 as one, the line width of the connecting line 222 on at least one flexible plate 221 can be set to be relatively large, even close to the width of the flexible plate 221. For example, the line width of the connecting line 222 is d3, the width of the flexible plate 221 is d4, d4 / 2≤d3≤d4, d4=d2. Since d1<d2 / 2, it can be seen that the line width of the connecting line 222 is larger than the line width of the trace A. The line width of the connecting line 222 can be increased without changing the width of the flexible circuit board 22 (flexible plate 221). Thus, while meeting the miniaturization design of the battery protection circuit 20, the impedance of the connecting line 222 on the flexible circuit board 22 can be reduced, thereby effectively reducing the heat loss of the flexible circuit board 22 during the charging and discharging process of the battery cell 21.

[0081] In some embodiments, two flexible circuit boards 22 are arranged along the width direction of the battery cell 21 on its side along its length direction. In other embodiments, two flexible circuit boards 22 are arranged along the length direction of the battery cell 21 on its side along its length direction. Both of these methods can maintain the width of the flexible board 221 within the width of the battery cell 21 while satisfying the requirement of increasing the line width of the connecting line 222. This avoids increasing the thickness of the battery cell 21 in its thickness direction, thus preventing the overall thickness of the battery protection circuit 20 from being too large, allowing the battery protection circuit 20 to be used in miniaturized electronic devices.

[0082] Since the main board 30, battery protection circuit 20, sub-board 40, and other components are arranged inside the casing along its length (the length of the battery cell 21), the space available for these components within the limited length of the casing is also limited. Therefore, the space for the battery protection circuit 20 along the length of the battery cell 21 is also limited. When two flexible circuit boards 22 are arranged along the width of the battery cell 21 on its side along its length, the two flexible circuit boards 22 do not need to be stacked along the length of the battery cell 21, thus avoiding an increase in the length of the battery protection circuit 20 and allowing it to be used in miniaturized electronic devices.

[0083] In addition, two flexible circuit boards 22 are arranged along the width direction of the battery cell 21, and two corresponding electrodes 211 are arranged along the width direction of the battery cell 21, so that the two flexible circuit boards 22 can be connected to the corresponding electrodes 211 respectively.

[0084] As one example, such as Figure 9 and Figure 10 As shown, the battery protection circuit 20 may include a first connector 23, which is disposed on two flexible boards 221 and electrically connected to the connecting lines 222 on the two flexible boards 221 respectively. The main board 30 is provided with a second connector 32, which is inserted into the first connector 23 so that the connecting lines 222 on the two flexible boards 221 are electrically connected to the main board 30 through the first connector 23 and the second connector 32 respectively.

[0085] Specifically, the charging circuit 31 and the grounding terminal on the motherboard 30 are electrically connected to the second connector 32, respectively. The charging circuit 31 of the motherboard 30 is electrically connected to the connecting line 222 on one of the flexible boards 221 through the first connector 23 and the second connector 32. The grounding terminal on the motherboard 30 is also electrically connected to the connecting line 222 on the other flexible board 221 through the first connector 23 and the second connector 32. Thus, the charging circuit 31 and the grounding terminal on the motherboard 30 are electrically connected to the two electrodes 211 of the battery cell 21, respectively, so that the battery cell 21 can be charged.

[0086] In the above design, the two flexible circuit boards 22 are electrically connected to the motherboard 30 through the same pair of connectors (i.e., the first connector 23 and the second connector 32). The number of second connectors 32 is relatively small, which can reduce the area occupied by the second connectors 32 on the motherboard 30 and facilitate the free layout of electronic components on the motherboard 30; at the same time, it can also reduce costs.

[0087] As another embodiment, such as Figure 7 and Figure 8 As shown, the battery protection circuit 20 may include two first connectors 23, each of which is disposed on a flexible board 221 and is electrically connected to a connecting line 222 on the flexible board 221. The main board 30 is provided with two second connectors 32, each of which is inserted into a first connector 23, so that the connecting line 222 on the flexible board 221 is electrically connected to the main board 30 through a first connector 23 and a second connector 32.

[0088] Specifically, the charging circuit 31 on the motherboard 30 is electrically connected to one of the second connectors 32, and the ground terminal on the motherboard 30 is electrically connected to another second connector 32. The charging circuit 31 on the motherboard 30 is electrically connected to the connecting line 222 on one of the flexible boards 221 through one of the first connectors 23 and one of the second connectors 32, and the ground terminal on the motherboard 30 is electrically connected to the connecting line 222 on another flexible board 221 through another first connector 23 and another second connector 32. Thus, the charging circuit 31 and the ground terminal on the motherboard 30 are electrically connected to the two electrodes 211 of the battery cell 21, respectively, so that the battery cell 21 can be charged.

[0089] In the above design, the two flexible circuit boards 22 are electrically connected to the motherboard 30 through a pair of connectors (i.e., the first connector 23 and the second connector 32). That is, the two flexible circuit boards 22 are connected to the motherboard 30 through independent first connectors 23. When the two flexible circuit boards 22 are detachable from the battery cell 21, compared with the method of using the same first connector 23 for the two flexible circuit boards 22, it avoids the need to replace both flexible circuit boards 22 when one of the flexible circuit boards 22 is damaged. Instead, the damaged flexible circuit board 22 can be replaced while the undamaged flexible circuit board 22 is retained, thereby reducing the replacement cost.

[0090] Optionally, both the first connector 23 and the second connector 32 can be connectors, contacts, or ports used for connection. For example, the first connector 23 and the second connector 32 can be board-to-board connectors (BTB).

[0091] For ease of description, such as Figure 7 and Figure 8As shown, in this application, the two electrodes 211 are defined as the first electrode 211a and the second electrode 211b, and the two flexible circuit boards 22 are defined as the first flexible circuit board 22a and the second flexible circuit board 22b, respectively. The flexible plate body 221 of the first flexible circuit board 22a is defined as the first flexible plate body 221a, and the connecting line 222 of the first flexible circuit board 22a is defined as the first connecting line 222a. Similarly, the flexible plate body 221 of the second flexible circuit board 22b is defined as the second flexible plate body 221b, and the connecting line 222 of the second flexible circuit board 22b is defined as the second connecting line 222b. It should be understood that the above definitions are merely for the convenience of describing this application and should not be used to limit the scope of protection of this application.

[0092] As one example, such as Figure 8 and Figure 9 As shown, only one of the two flexible plates 221 has a single connecting line 222. For example, there may be one first connecting line 222a and two second connecting lines 222b. The first connecting line 222a is electrically connected to the first electrode 211a, one second connecting line 222b is electrically connected to the second electrode 211b, and the other second connecting line 222b is connected to the first electrode 211a. And as... Figure 8 As shown, when the first connecting line 222a and the second connecting line 222b electrically connected to the first electrode 211a are electrically connected to the charging circuit 31, the second connecting line 222b electrically connected to the second electrode 211b is electrically connected to the ground terminal of the motherboard 30. Conversely, when the first connecting line 222a and the second connecting line 222b electrically connected to the first electrode 211a are electrically connected to the ground terminal of the motherboard 30, the second connecting line 222b electrically connected to the second electrode 211b is electrically connected to the charging circuit 31.

[0093] Since there is only one first connecting line 222a on the first flexible plate 221a, the line width of the first connecting line 222a can be set to be relatively large, even close to the width of the first flexible plate 221a. Thus, the line width of the first connecting line 222a can be increased without changing the width of the first flexible plate 221a. This can reduce the impedance of the first connecting line 222a while meeting the requirements of the thin and light miniaturized design of the battery protection circuit 20, thereby effectively reducing the heat loss of the first flexible circuit board 22a during the charging and discharging process of the battery cell 21.

[0094] As another embodiment, such as Figure 10 and Figure 11As shown, the connecting lines 222 on both flexible plates 221 are single lines. For example, the first connecting line 222a and the second connecting line 222b are both single lines. The first connecting line 222a is electrically connected to the first electrode 211a, and the second connecting line 222b is electrically connected to the second electrode 211b. Furthermore, the first connecting line 222a is electrically connected to the charging circuit 31, and the second connecting line 222b is electrically connected to the ground terminal of the motherboard 30. That is, the ground terminal on the motherboard 30 and the charging circuit 31 are each electrically connected to the electrode 211 of the battery cell 21 via independent flexible circuit boards 22. They do not share the same flexible circuit board 22, but are each electrically connected to the electrode 211 of the battery cell 21 through their own independent flexible circuit boards 22.

[0095] Since there is only one connecting line 222 on each of the two flexible boards 221, the line width of the connecting line 222 on each flexible board 221 can be set to be relatively large, even close to the width of the flexible board 221. This allows for an increase in the line width of the connecting line 222 on each flexible board 221 without changing the width of each flexible board 221. As a result, while meeting the requirements of the thin and light miniaturized design of the battery protection circuit 20, the impedance of the connecting line 222 on each flexible board 221 can be reduced, thereby effectively reducing the heat loss of each flexible circuit board 22 during the charging and discharging process of the battery cell 21.

[0096] The following will describe the technical solution of this application in more detail, taking the example that there is only one connecting line 222 on both flexible plates 221.

[0097] As one example, such as Figure 12 and Figure 13 As shown, the battery protection circuit 20 also includes a battery protection board 24, which is disposed between the flexible circuit board 22 and the battery cell 21. The battery protection board 24 is provided with a protection circuit 241 and a conductive line 242. The connecting line 222 on one flexible plate 221 is electrically connected to one electrode 211 through the protection circuit 241, and the connecting line 222 on the other flexible plate 221 is electrically connected to the other electrode 211 through the conductive line 242.

[0098] By setting up the battery protection board 24, the protection circuit 241 on the battery protection board 24 can protect the battery cell 21, preventing problems such as overcharging, over-discharging, excessive transmission current, excessive transmission voltage, and short circuit of the battery cell 21, so as to avoid damage to the battery cell 21.

[0099] In addition, such as Figure 12 and Figure 13As shown, in combination with the design that there is only one connecting line 222 on each flexible plate 221, and in order to avoid short circuits, the positive or negative terminal of the cell 21 is generally not electrically connected to the connecting line 222 on the same flexible plate 221. Specifically, the two electrodes 211 of the cell 21 are electrically connected to the connecting line 222 on one flexible plate 221 through the protection circuit 241 and the conductive line 242, respectively. In this way, the electrode 211 electrically connected to the conductive line 242 no longer needs to be routed on the battery protection board 24 to achieve the electrical connection between the electrode and the connecting lines 222 on the two flexible plates 221. Similarly, the electrode 211 electrically connected to the protection circuit 241 no longer needs to be routed on the battery protection board 24 to achieve the electrical connection between the electrode and the connecting lines 222 on the two flexible plates 221. This makes the wiring on the battery protection board 24 neater and reduces the number of wirings on the battery protection board 24, thereby increasing the wiring width on the battery protection board 24. This effectively reduces the wiring impedance of the battery protection board 24 and the flexible circuit board 22, and reduces the heat loss of the battery protection board 24 and the flexible circuit board 22 during the charging and discharging process of the battery cell 21.

[0100] In some embodiments, the battery protection board 24 extends from between one flexible circuit board 22 and the battery cell 21, along the width direction of the battery cell 21, to between the other flexible circuit board 22 and the battery cell 21. This arrangement allows the battery protection board 24 to extend along the arrangement direction of the two flexible circuit boards 22, and the battery protection board 24 can be partially disposed corresponding to one flexible circuit board 22 and partially disposed corresponding to the other flexible circuit board 22, facilitating connection between the battery protection board 24 and the two flexible circuit boards 22.

[0101] As another embodiment, such as Figure 14 As shown, a protection circuit 241 is provided on the motherboard 30. This protection circuit 241 is electrically connected to one electrode 211 through one connecting line 222, and the charging circuit 31 is electrically connected to the other electrode 211 through another connecting line 222. Thus, the protection circuit 241 can protect the battery cell 21, preventing problems such as overcharging, over-discharging, excessive current transmission, excessive voltage transmission, and short circuits, thereby avoiding damage to the battery cell 21.

[0102] Furthermore, by integrating the protection circuit 241 onto the main board 30, the battery protection board 24 is eliminated. By separating the protection circuit 241 from the battery cell, the battery cell, two flexible circuit boards 22, and two first connectors can be directly packaged. Compared to placing the protection circuit 241 on the battery protection board 24, one battery protection board 24 can be saved. Thus, the battery protection board 24 and its wiring no longer exist, which can greatly reduce the wiring impedance of the battery protection board 24 and reduce the heat loss of the battery protection board 24 during battery charging and discharging. Moreover, since there is no need to manufacture or purchase an additional battery protection board 24, costs can be saved to a certain extent, resulting in lower costs.

[0103] Although integrating the protection circuit 241 onto the motherboard 30 will take up space on the motherboard 30 and make the size of the motherboard 30 slightly larger, the omission of a battery protection board 24 can free up some space in the casing to a certain extent, thus reserving space for the increase in the size of the motherboard 30. Therefore, even if the protection circuit 241 is integrated onto the motherboard 30, it can still meet the miniaturization design of electronic devices.

[0104] As an optional implementation method, such as Figure 15 and Figure 16 As shown, the protection circuit 241 may include a resistor 2411, a protection switch 2412, and a protection chip 2413. The first end of the resistor 2411 is connected to one of the electrodes 211, and the second end of the resistor 2411 is connected to the first end of the protection switch 2412. The second end of the protection switch 2412 is electrically connected to a connecting line 222 of one of the flexible plates 221. The first sampling terminal of the protection chip 2413 is connected to the first end of the resistor 2411, and the second sampling terminal of the protection chip 2413 is connected to the second end of the resistor 2411. The output terminal of the protection chip 2413 is electrically connected to the control terminal of the protection switch 2412. The protection chip 2413 is used to detect the parameters of the resistor 2411 and control the switching on and off of the protection switch 2412 according to the parameters of the resistor 2411. The parameters of the resistor 2411 include voltage or current.

[0105] When the battery cell 21 is charging or discharging, the protection chip 2413 can detect the voltage of the resistor 2411 and obtain the current flowing through the resistor 2411 (i.e., the current of the resistor 2411) based on the voltage of the resistor 2411, or detect the current of the resistor 2411. When the voltage of the resistor 2411 is greater than a preset voltage threshold, and / or the current of the resistor 2411 is greater than a preset current threshold, the protection chip 2413 can control the protection switch 2412 to turn off, thereby stopping charging or discharging, preventing the voltage or current output by the battery cell 21 from being too high, preventing the battery cell 21 from being overcharged or over-discharged, and thus avoiding damage to the battery cell 21.

[0106] In some specific embodiments, the protection switch 2412 may be a metal oxide semiconductor (MOS) field-effect transistor.

[0107] In some embodiments, the protection circuit 241 further includes a fuel gauge module 2414. The first sampling terminal of the fuel gauge module 2414 is connected to the first terminal of the resistor 2411, and the second sampling terminal of the fuel gauge module 2414 is connected to the second terminal of the resistor 2411. The fuel gauge module 2414 is used to detect the parameters of the resistor 2411 to obtain the charge level of the battery cell 21. That is, when the fuel gauge module 2414 is working, it can detect the voltage or current of the resistor 2411 and determine the charge level of the battery cell 21 based on the voltage or current of the resistor 2411.

[0108] Since the power meter module 2414 and the protection chip 2413 detect the parameters of the same resistor 2411, the overvoltage and overcurrent protection of the battery cell 21 and the power measurement of the battery cell 21 can share the same resistor 2411. This can improve the reusability of the resistor 2411, reduce the number of resistors 2411, and save costs.

[0109] As another alternative implementation method, such as Figure 17 and Figure 18 As shown, the protection circuit 241 includes a resistor 2411, a protection switch 2412, a fuel gauge module 2414, and a protection chip 2413. The first end of the resistor 2411 is connected to one of the electrodes 211, and the second end of the resistor 2411 is connected to the first end of the protection switch 2412. The second end of the protection switch 2412 is electrically connected to the connecting line 222 of one of the flexible plates 221. The first sampling end of the fuel gauge module 2414 is connected to the first end of the resistor 2411, and the second sampling end of the fuel gauge module 2414 is connected to the second end of the resistor 2411. The fuel gauge module 2414 is used to detect the parameters of the resistor 2411 to obtain the charge of the battery cell 21. The input end of the protection chip 2413 is connected to the output end of the fuel gauge module 2414, and the output end of the protection chip 2413 is electrically connected to the control end of the protection switch 2412. The protection chip 2413 is used to control the opening and closing of the protection switch 2412 according to the parameters of the resistor 2411 obtained by the fuel gauge module 2414. The parameters of resistor 2411 include voltage or current.

[0110] When the fuel gauge module 2414 is working, it can detect the voltage or current of the resistor 2411 and determine the charge level of the battery cell 21 based on the voltage or current of the resistor 2411. Simultaneously, the fuel gauge module 2414 also sends the detected voltage or current of the resistor 2411 to the protection chip 2413. When the voltage of the resistor 2411 exceeds a preset voltage threshold, and / or the current of the resistor 2411 exceeds a preset current threshold, the protection chip 2413 can control the protection switch 2412 to turn off, thereby stopping charging or discharging, preventing the output voltage or current of the battery cell 21 from becoming too high, and preventing overcharging or over-discharging of the battery cell 21 to avoid damage to the battery cell 21.

[0111] Since the fuel gauge module 2414 and the protection chip 2413 detect the parameters of the same resistor 2411, the overvoltage and overcurrent protection of the battery cell 21 and the power measurement of the battery cell 21 can share the same resistor 2411. This improves the reusability of the resistor 2411, reduces the number of resistors 2411, and saves costs. In addition, compared to the method where the first sampling terminal of the protection chip 2413 is connected to the first terminal of the resistor 2411, and the second sampling terminal of the protection chip 2413 is connected to the second terminal of the resistor 2411, and the input terminal of the protection chip 2413 is connected to the output terminal of the fuel gauge module 2414, the circuit is simpler and clearer.

[0112] Understandable, Figures 15 to 18 These are just two possible specific circuit structures for the protection circuit 241 to protect the battery cell 21 in the electronic device provided in this application embodiment. In other embodiments, the protection circuit 241 may also include electronic components such as capacitors, inductors, or more resistors 2411.

[0113] In some specific embodiments, the protection switch 2412 may be a metal oxide semiconductor (MOS) field-effect transistor.

[0114] Understandably, when the protection circuit 241 is integrated into the battery protection board 24, and the protection circuit 241 includes the fuel gauge module 2414, it is equivalent to integrating the fuel gauge module 2414 into the battery protection board 24. Thus, the fuel gauge module 2414 can be calibrated during the battery protection board 24 stage, that is, during the stage when the battery protection board 24 and the battery cell 21 are assembled to form the battery protection circuit 20, thereby facilitating the calibration of the fuel gauge module 2414.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] Furthermore, the embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the content of this specification should not be construed as a limitation of this application, and the protection scope of this application should be determined by the appended claims.

Claims

1. A battery protection circuit, wherein the battery protection circuit is disposed in an electronic device, characterized in that, The battery protection circuit includes: A battery cell, wherein two electrodes are provided on one side of the battery cell; and, Two flexible circuit boards are disposed on the side of the electrode of the battery cell, and each flexible circuit board includes a flexible plate and a connecting line. The connecting line is disposed on the flexible plate and is electrically connected to the electrode. At least one connecting line on the flexible plate is a single line.

2. The battery protection circuit according to claim 1, characterized in that, Each of the flexible plates has one connecting line, and each flexible plate is electrically connected to an electrode through one of the connecting lines.

3. The battery protection circuit according to claim 1, characterized in that, The two electrodes are arranged along the width direction of the battery cell, and the two flexible circuit boards are arranged along the width direction of the battery cell.

4. The battery protection circuit according to claim 1, characterized in that, The battery also includes a first connector disposed on the two flexible plates. The first connector is electrically connected to the connecting lines on the two flexible plates respectively. The first connector is used to plug into a second connector on the motherboard of the electronic device. The connecting lines on the two flexible plates are connected to the motherboard through the first connector and the second connector respectively.

5. The battery protection circuit according to claim 1, characterized in that, The battery also includes two first connectors, each of which is disposed on a flexible plate. Each first connector is electrically connected to a connecting line on the flexible plate. Each first connector is used to plug into a second connector on the motherboard of the electronic device. The connecting line on each flexible plate is electrically connected to the motherboard through a first connector and a second connector.

6. The battery protection circuit according to claim 1, characterized in that, The battery also includes a battery protection board, which is disposed between the flexible circuit board and the battery cell. The battery protection board is provided with a protection circuit and conductive lines. The connecting line on one of the flexible plates is electrically connected to one of the electrodes through the protection circuit, and the connecting line on the other flexible plate is electrically connected to the other electrode through the conductive lines.

7. The battery protection circuit according to claim 6, characterized in that, The two electrodes are arranged along the width direction of the battery cell, and the two flexible circuit boards are arranged along the width direction of the battery cell. The battery protection board extends from between one of the flexible circuit boards and the battery cell, along the width direction of the battery cell, to between the other flexible circuit board and the battery cell.

8. The battery protection circuit according to claim 6, characterized in that, The protection circuit includes a resistor, a protection switch, and a protection chip. The first end of the resistor is connected to one of the electrodes, the second end of the resistor is connected to the first end of the protection switch, and the second end of the protection switch is electrically connected to the connecting line on one of the flexible plates. The first sampling terminal of the protection chip is connected to the first terminal of the resistor, the second sampling terminal of the protection chip is connected to the second terminal of the resistor, and the output terminal of the protection chip is electrically connected to the control terminal of the protection switch. The protection chip is used to detect the parameters of the resistor and control the conduction and deactivation of the protection switch according to the parameters of the resistor. The parameters of the resistor include voltage or current.

9. The battery protection circuit according to claim 8, characterized in that, The protection circuit also includes a power meter module. The first sampling terminal of the power meter module is connected to the first terminal of the resistor, and the second sampling terminal of the power meter module is connected to the second terminal of the resistor. The power meter module is used to detect the parameters of the resistor to obtain the power of the battery cell.

10. The battery protection circuit according to claim 6, characterized in that, The protection circuit includes a resistor, a protection switch, a fuel gauge module, and a protection chip. The first end of the resistor is connected to one of the electrodes, the second end of the resistor is connected to the first end of the protection switch, and the second end of the protection switch is electrically connected to the connecting line on one of the flexible plates. The first sampling terminal of the fuel gauge module is connected to the first terminal of the resistor, and the second sampling terminal of the fuel gauge module is connected to the second terminal of the resistor. The fuel gauge module is used to detect the parameters of the resistor to obtain the charge of the battery cell. The input terminal of the protection chip is connected to the output terminal of the fuel gauge module, and the output terminal of the protection chip is electrically connected to the control terminal of the protection switch. The protection chip is used to control the conduction and de-conduction of the protection switch according to the resistance parameter obtained by the fuel gauge module. The parameters of the resistor include voltage or current.

11. An electronic device, characterized in that, The electronic device includes a motherboard and a battery protection circuit as described in any one of claims 1-10, with two flexible circuit boards disposed between the motherboard and the battery cell, and the motherboard electrically connected to the electrodes via the connecting wires.

12. An electronic device, characterized in that, The electronic device includes a motherboard, a protection circuit, a charging circuit, and a battery protection circuit as described in any one of claims 1-5. Two flexible circuit boards are disposed between the motherboard and the battery cell. The protection circuit and the charging circuit are both disposed on the motherboard. The protection circuit is electrically connected to one of the electrodes through one of the connecting lines, and the charging circuit is electrically connected to the other electrode through the other connecting line.

13. The electronic device according to claim 12, characterized in that, The protection circuit includes a resistor, a protection switch, and a protection chip. The first end of the resistor is connected to one of the electrodes, the second end of the resistor is connected to the first end of the protection switch, and the second end of the protection switch is electrically connected to the connecting line on one of the flexible plates. The first sampling terminal of the protection chip is connected to the first terminal of the resistor, the second sampling terminal of the protection chip is connected to the second terminal of the resistor, and the output terminal of the protection chip is electrically connected to the control terminal of the protection switch. The protection chip is used to detect the parameters of the resistor and control the conduction and deactivation of the protection switch according to the parameters of the resistor. The parameters of the resistor include voltage or current.

14. The electronic device according to claim 13, characterized in that, The protection circuit also includes a power meter module. The first sampling terminal of the power meter module is connected to the first terminal of the resistor, and the second sampling terminal of the power meter module is connected to the second terminal of the resistor. The power meter module is used to detect the parameters of the resistor to obtain the power of the battery cell.

15. The electronic device according to claim 13, characterized in that, The protection circuit includes a resistor, a protection switch, a fuel gauge module, and a protection chip. The first end of the resistor is connected to one of the electrodes, the second end of the resistor is connected to the first end of the protection switch, and the second end of the protection switch is electrically connected to the connecting line on one of the flexible plates. The first sampling terminal of the fuel gauge module is connected to the first terminal of the resistor, and the second sampling terminal of the fuel gauge module is connected to the second terminal of the resistor. The fuel gauge module is used to detect the parameters of the resistor to obtain the charge of the battery cell. The input terminal of the protection chip is connected to the output terminal of the fuel gauge module, and the output terminal of the protection chip is electrically connected to the control terminal of the protection switch. The protection chip is used to control the opening and closing of the protection switch according to the power of the battery cell obtained by the fuel gauge module. The parameters of the resistor include voltage or current.

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