Rechargeable battery assembly and electronic device

Abstract

The application discloses a charging battery assembly and an electronic device, and belongs to the technical field of electronic devices. The charging battery assembly comprises a battery, a flexible circuit board and a colloid. The battery comprises a body, a first tab and a second tab. The flexible circuit board is connected with the body. The first end of the flexible circuit board is electrically connected with the first tab and the second tab. The second end of the flexible circuit board comprises a connector. The connector is located between the first tab and the second tab. The connector is used for receiving a charging signal. The charging signal is used for charging the battery. The colloid connects the battery and the flexible circuit board, and is used for dissipating heat for the flexible circuit board.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, specifically relating to a rechargeable battery assembly and an electronic device. Background Technology

[0002] In related technologies, fast charging solutions typically charge batteries through two charging circuits, which means setting up two flexible printed circuits (FPCs). The two FPCs must be connected to the battery's printed circuit board (PCB), resulting in long trace lengths, high line impedance, and high charging temperatures for both the FPCs and the PCB. Summary of the Invention

[0003] This application aims to provide a rechargeable battery assembly and electronic device that can solve the problems of high line impedance and high charging temperature in related technologies.

[0004] In a first aspect, embodiments of this application provide a rechargeable battery assembly, comprising:

[0005] A battery, comprising a main body, a first tab, and a second tab;

[0006] A flexible circuit board is connected to the body. The first end of the flexible circuit board is electrically connected to the first tab and the second tab. The second end of the flexible circuit board includes a connector located between the first tab and the second tab. The connector is used to receive a charging signal, which is used to charge the battery.

[0007] A colloid connects the battery and the flexible circuit board, serving to dissipate heat from the flexible circuit board.

[0008] Secondly, embodiments of this application provide an electronic device, comprising:

[0009] Such as the rechargeable battery assembly mentioned in the first aspect.

[0010] In this embodiment, the number of flexible printed circuit boards (FPCs) is set to one, and the FPC is positioned between the two tabs of the battery. This effectively reduces the wiring length of the FPC, decreases line impedance, and thus reduces heat generation. Simultaneously, by using an adhesive to connect the FPC and dissipate heat, heat accumulation during battery charging is effectively reduced, lowering the battery charging temperature.

[0011] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0013] Figure 1 A schematic diagram of the rechargeable battery assembly according to an embodiment of this application is shown;

[0014] Figure 2 A schematic diagram of the wiring of a charging circuit in the related technology is shown;

[0015] Figure 3 A schematic diagram of the wiring of the charging circuit according to an embodiment of this application is shown;

[0016] Figure 4 A schematic diagram of the structure of the flexible circuit board according to an embodiment of this application is shown;

[0017] Figure 5 A schematic diagram of the structure of a rechargeable battery assembly in the related technology is shown;

[0018] Figure 6 A schematic diagram of the rechargeable battery assembly according to an embodiment of this application is shown;

[0019] Figure 7 A schematic diagram of the rechargeable battery assembly according to an embodiment of this application is shown.

[0020] Figure 8 A schematic diagram of the charging temperature curve of the relevant technology is shown;

[0021] Figure 9 A schematic diagram of the charging temperature curve of an embodiment of this application is shown;

[0022] Figure 10 A circuit diagram of a printed circuit board according to an embodiment of this application is shown.

[0023] Figure label:

[0024] 10 Rechargeable battery assembly, 101 Battery, 1012 Body, 1014 First tab, 1016 Second tab, 1018 Printed circuit board, 102 Flexible circuit board, 1022 Connector, 103 Glue, Rs Detection resistor, Q1 First transistor, IC1 First charging control chip, Q2 Second transistor, IC2 Second charging control chip. Detailed Implementation

[0025] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this application.

[0028] 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.

[0029] The following is combined Figures 1 to 10 This application describes rechargeable battery components and electronic devices according to embodiments of the present application.

[0030] In some embodiments of this application, a rechargeable battery assembly is provided. Figure 1 A schematic diagram of the rechargeable battery assembly according to an embodiment of this application is shown, as follows: Figure 1 As shown, the rechargeable battery assembly 10 includes:

[0031] Battery 101 includes a body 1012, a first electrode 1014, and a second electrode 1016.

[0032] Flexible circuit board 102 is connected to body 1012. The first end of flexible circuit board 102 is electrically connected to the first tab 1014 and the second tab 1016. The second end of flexible circuit board 102 includes a connector 1022, which is located between the first tab 1014 and the second tab 1016. The connector 1022 is used to receive a charging signal, which is used to charge battery 101.

[0033] Colloid 103 connects the body 1012 and the flexible circuit board 102, and is used to dissipate heat from the flexible circuit board 102.

[0034] In this embodiment of the application, the rechargeable battery assembly 10 includes a battery 101, a flexible circuit board 102, and a gel 103. The battery 101 includes a body 1012, a first tab 1014, and a second tab 1016. The first tab 1014 and the second tab 1016 are disposed on the body 1012 of the battery 101, forming the positive and negative electrodes of the battery 101.

[0035] The flexible circuit board 102, also known as the FPC, has its first end electrically connected to the first tab 1014 and the second tab 1016 of the battery 101. The second end of the flexible circuit board 102 is provided with a connector 1022, which is used to connect to an external charging circuit to receive the charging signal input from the external charging circuit and transmit the received charging signal to the first tab 1014 and the second tab 1016, thereby charging the battery body 1012.

[0036] In this embodiment, compared to related technologies, the number of FPCs is reduced to one, and the connector 1022 is located between the two tabs of the battery 101, as shown below. Figure 1 As shown, the original two FPC circuits have been reduced to one. This configuration can effectively reduce the trace length, thereby reducing the line resistance and helping to reduce the heat generated when a large current passes through the FPC circuit during fast charging.

[0037] For example, Figure 2 A schematic diagram of the wiring of a charging circuit in related technologies is shown. Figure 3 A schematic diagram of the wiring of the charging circuit according to an embodiment of this application is shown, as follows: Figure 2 and Figure 3 As shown, the embodiments of this application can significantly reduce the trace length.

[0038] Meanwhile, the flexible circuit board 102 is connected to the body 1012 of the battery 101 through the adhesive 103. The adhesive 103 can firmly connect the flexible circuit board 102 and the body 1012 of the battery 101. In special circumstances such as the mobile phone being dropped, the adhesive 103 can protect the connection between the flexible circuit board 102 and the body 1012 of the battery 101, and prevent or reduce problems such as the FPC circuit desoldering or falling off due to external impact.

[0039] The colloid 103 also helps dissipate heat for the flexible circuit board 102. When the battery 101 is fast-charging, the current passes through the FPC and then to the battery 101 tabs. The FPC's own resistance will generate heat under the influence of the current, thus generating heat accumulation. The colloid 103 can quickly dissipate this heat, thereby reducing the temperature of the FPC when the battery 101 is charging and preventing overheating.

[0040] This embodiment of the application, by setting a single FPC circuit and positioning the FPC circuit and the end connector 1022 between the two tabs of the battery 101, effectively reduces the wiring length of the FPC portion of the rechargeable battery assembly 10, reduces line impedance, and thus reduces heat generation. Simultaneously, the use of a gel 103 to connect the FPC and the battery 101 body 1012 improves the connection strength of the FPC and accelerates heat dissipation, reducing heat accumulation and lowering the charging temperature of the battery 101.

[0041] In some embodiments of this application, a portion of the flexible circuit board 102 is attached to the body 1012, and another portion of the flexible circuit board 102 extends out of one end of the body 1012 along the length direction of the body 1012, and the connector 1022 is disposed on the portion of the flexible circuit board 102 that extends out of the body 1012.

[0042] In the embodiments of this application, Figure 4 A schematic diagram of the structure of the flexible circuit board according to an embodiment of this application is shown, as follows: Figure 4 As shown, the flexible circuit board 102 provided in this embodiment is located in the middle of the protection plate of the battery 101, and the flexible circuit board 102 extends along the length direction of the body 1012 without bending.

[0043] In related technologies, two FPCs are set on the rechargeable battery assembly. The two FPCs include the back of the street battery protection board and are bent to the front of the protection board. The advantage of doing this is that it provides enough room for the FPC and the connector at the end of the FPC. When it is subjected to external impact, the impact force can be dispersed by the flexibility of the FPC itself to prevent the FPC from falling off. However, it will significantly increase the length of the FPC circuit, increase the total field of the charging path, and lead to an increase in line resistance.

[0044] For example, Table 1 shows the line impedance of a dual flexible circuit in the related art, and Table 2 shows the line impedance of a single flexible circuit in an embodiment of this application:

[0045] Table 1

[0046]

[0047]

[0048] Table 2

[0049]

[0050] As shown in Tables 1 and 2, the related technologies use two charging circuits with average impedances of 18.09 mΩ and 15.46 mΩ, respectively. In contrast, the charging circuit provided in this embodiment has an impedance of 11.56 mΩ, significantly reducing the line impedance.

[0051] In this embodiment, the flexible circuit board 102 is no longer bent, but extends directly along the first direction, causing the connector 1022 to protrude from the body 1012 of the battery 101. This significantly reduces the line length of the flexible circuit board 102 and reduces line resistance. Simultaneously, the colloid 103 ensures a firm connection between the flexible circuit board 102 and the battery 101, thus preventing the flexible circuit from detaching from the battery 101 when subjected to external impacts.

[0052] In the rechargeable battery assembly 10 provided in this application embodiment, the flexible circuit board 102 no longer bends, thus effectively reducing the wiring length and line resistance, thereby reducing the heat generated during charging and lowering the charging temperature of the battery 101.

[0053] In some embodiments of this application, the battery 101 further includes a printed circuit board 1018, which is connected to the body 1012. The side of the printed circuit board 1018 facing the body 1012 is the back side of the printed circuit board 1018. A first pad, a second pad, and a third pad are provided on the back side of the printed circuit board 1018, with the second pad located between the first pad and the third pad.

[0054] The first tab 1014 is electrically connected to the first pad, the second tab 1016 is electrically connected to the third pad, and the colloid 103 is electrically connected to the second pad.

[0055] In this embodiment of the application, the battery 101 includes a printed circuit board 1018 (PCB), which is specifically a protection circuit board for the battery 101. The printed circuit board 1018 is provided with a device for protecting the charging and discharging safety of the battery 101. When the charging current or discharging current of the battery 101 exceeds a threshold, the charging and discharging circuit of the battery 101 is cut off to protect the charging and discharging safety of the battery 101.

[0056] A printed circuit board 1018 is disposed at one end of the body 1012 of the battery 101 and connected to the body 1012 of the battery 101. The back side of the printed circuit board 1018, specifically the side facing the battery 101, is provided with pads, including a first pad, a second pad, and a third pad. The first tab 1014 of the battery 101 is soldered to the first pad, the second tab 1016 of the battery 101 is soldered to the third pad, and the flexible circuit board 102, i.e., the FPC, is soldered to the second pad.

[0057] The second guard is positioned between the first pad and the second pad, that is, the FPC pad is located between the pads of the two tabs of the battery 101. Since the flexible circuit board 102 is also positioned between the two tabs of the battery 101, this configuration can optimize the routing, further reduce the routing length, reduce the line resistance, and thus reduce the heat generated during charging.

[0058] The flexible circuit board 102 is connected to the printed circuit board 1018, which is the protection circuit board of the battery 101, through the colloid 103. This ensures the connection strength between the flexible circuit board 102 and the protection circuit board. At the same time, the colloid 103 can provide additional heat dissipation for the flexible circuit board 102, thereby further reducing the heat generated by the battery 101 during charging.

[0059] For example, Figure 5 A schematic diagram of the structure of a rechargeable battery assembly in the related art is shown. Figure 6 A schematic diagram of the rechargeable battery assembly according to an embodiment of this application is shown, as follows: Figure 5 and Figure 6 As shown, the embodiments of this application can effectively reduce the length of the flexible circuit board 102, thereby reducing the trace length and reducing the line resistance.

[0060] By reducing the number of flexible circuit boards 102 and the corresponding number of pads, and placing the pads on the side of the printed circuit board 1018 facing the battery 101, the stacking thickness of the printed circuit board 1018 area does not need to be increased, thus effectively reducing the size of the printed circuit board 1018 and consequently reducing the size of the rechargeable battery assembly 10.

[0061] This application embodiment optimizes the pad setting method, which can effectively reduce the trace length of FPC, thereby reducing the line resistance and reducing the heat generation during the charging process of battery 101, thus lowering the charging temperature of battery 101.

[0062] In some embodiments of this application, the colloid 103 encapsulates the first tab 1014 and the second tab 1016, and encapsulates at least a portion of the flexible circuit board 102 and at least a portion of the printed circuit board 1018.

[0063] In this embodiment, colloid 103 is specifically a colloid; exemplarily, the colloid is a colloid used in injection molding. Specifically, Figure 7 A schematic diagram of the rechargeable battery assembly according to an embodiment of this application is shown, as follows: Figure 7 As shown, the colloid 103 is disposed on one side of the pad on the printed circuit board 1018. The colloid 103 can wrap the first tab 1014 and the first pad, the second tab 1016 and the third pad, and wrap the second pad and a portion of the flexible circuit board 102 and at least a portion of the body 1012 of the printed circuit board 1018.

[0064] By providing the colloid 103, the connection reliability between the flexible circuit board 102 and the printed circuit board 1018 can be improved. At the same time, since the thermal conductivity of the colloid is significantly greater than that of air, for example, taking injection molding as an example, the average thermal conductivity of injection molding is about 0.2 W / (m×k), while the thermal conductivity of air is about 0.023 W / (m×k). Therefore, by providing the colloid to wrap the flexible circuit board 102, the heat dissipation efficiency of the flexible circuit board 102 can be significantly improved.

[0065] By providing the colloid 103 in this embodiment, the connection reliability between the flexible circuit board 102 and the printed circuit board 1018 can be improved, while the heat dissipation efficiency of the flexible circuit board 102 can be increased and the charging temperature of the battery 101 can be reduced.

[0066] In some embodiments of this application, the colloid 103 is formed by an injection molding encapsulation process.

[0067] In this embodiment of the application, an injection molding encapsulation process is used to encapsulate the connection between the printed circuit board 1018 and the flexible circuit board 102 of the rechargeable battery assembly 10. Through the injection molding encapsulation process, injection molding compound is formed on the printed circuit board 1018, the flexible circuit board 102, and the connection between the printed circuit board 1018 and the flexible circuit board 102.

[0068] Injection molding can effectively encapsulate the printed circuit board 1018, the flexible circuit board 102, and the connection between them, thereby improving the connection reliability between the printed circuit board 1018 and the flexible circuit board 102. This eliminates the need for the flexible circuit board 102 to have a large amount of space to cope with external impacts such as drops, thus reducing the trace length of the flexible circuit board 102 and lowering the line resistance.

[0069] Meanwhile, since injection molding compound has good thermal conductivity, it can effectively improve the heat dissipation efficiency of flexible circuit board 102.

[0070] Figure 8 A schematic diagram of the charging temperature curve of the relevant technology is shown. Figure 9 A schematic diagram of the charging temperature curve of an embodiment of this application is shown, as follows: Figure 8 and Figure 9 As shown, the embodiments of this application can significantly reduce the charging temperature of battery 101. When the charging current is 10A, the temperature can be reduced by 30°C, when the charging current is 8A, the temperature can be reduced by 8°C, and when the charging current is 6A, the temperature can be reduced by 6°C.

[0071] In this embodiment, the colloid 103 is formed by injection molding encapsulation, which can improve the connection reliability between the flexible circuit board 102 and the printed circuit board 1018, while improving the heat dissipation efficiency of the flexible circuit board 102 and reducing the charging temperature of the battery 101.

[0072] In some embodiments of this application, the printed circuit board 1018 further includes a detection resistor Rs, the first end of which is electrically connected to the second tab 1016, and the second end of which is electrically connected to the flexible circuit board 102. The detection resistor is used to detect the current value of the charging signal.

[0073] In this embodiment, the printed circuit board 1018 is specifically a charging protection circuit board for the battery 101. The detection resistor Rs is used to sample the current value of the charging signal, thereby providing current protection for the charging and discharging process of the battery 101.

[0074] Specifically, Figure 10 A circuit diagram of a printed circuit board according to an embodiment of this application is shown, such as... Figure 10 As shown, the first end of the detection resistor Rs is electrically connected to the second tab 1016, which is the negative terminal of the battery 101, and the second end of the detection resistor Rs is electrically connected to the flexible circuit board 102. By obtaining the voltage value across the detection resistor and combining it with the resistance value of the detection resistor Rs, the current value of the charging signal in the charging circuit can be accurately identified.

[0075] If an excessive current value is detected, the charging or discharging process of battery 101 will be stopped to prevent overcurrent damage to the battery components and charging path.

[0076] This application embodiment uses a detection resistor Rs to detect the current value of the charging signal during the charging process of battery 101 in real time. This allows the charging circuit to be disconnected immediately when the current value exceeds the limit, preventing overcurrent damage to battery 101 and the charging path, and improving the reliability of battery 101 charging.

[0077] In some embodiments of this application, the printed circuit board 1018 further includes:

[0078] The first transistor Q1 has its first terminal electrically connected to the second terminal of the detection resistor Rs, and its second terminal is electrically connected to the flexible circuit board 102.

[0079] The first charging control chip IC1 has its first terminal electrically connected to the second terminal of the detection resistor Rs, its second terminal electrically connected to the third terminal of the first transistor Q1, and its third terminal electrically connected to the first tab 1014.

[0080] In this embodiment, a first transistor Q1 and a first charging control chip IC1 are further disposed on the printed circuit board 1018. The first charging control chip IC1 is electrically connected to the detection resistor Rs, the first transistor Q1, and the first tab 1014. The first charging control chip IC1 and the first transistor Q1 form a first protection circuit.

[0081] The first charging control chip IC1 can protect the charging process of battery 101. Specifically, when the current value of the charging signal is detected to exceed the current threshold, the first charging control chip IC1 controls the first transistor Q1 to turn off. At this time, the charging circuit is cut off, which can prevent the battery 101 or the charging circuit from being damaged by excessive overcurrent, thus ensuring charging safety.

[0082] For example, the first transistor Q1 is a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor).

[0083] In this embodiment, a first charging control chip IC1 and a first transistor Q1 are provided to provide charging current protection for the rechargeable battery assembly 10, thereby improving the charging safety and reliability of the rechargeable battery assembly 10.

[0084] In some embodiments of this application, the printed circuit board 1018 further includes:

[0085] The second transistor Q2 has its first terminal electrically connected to the second terminal of the first transistor Q1, and its second terminal is electrically connected to the flexible circuit board 102.

[0086] The second charging control chip IC2 has its first terminal electrically connected to the second terminal of the detection resistor Rs, its second terminal electrically connected to the third terminal of the second transistor Q2, and its third terminal electrically connected to the first electrode 1014.

[0087] In this embodiment, a second transistor Q2 and a second charging control chip IC2 are further disposed on the printed circuit board 1018. The second charging control chip IC2 is electrically connected to the detection resistor Rs, the second transistor Q2, and the first electrode 1014. The second charging control chip IC2 and the second transistor Q2 form a second protection circuit that works together with the first protection circuit.

[0088] The second charging control chip IC2 can protect the charging process of battery 101. Specifically, when the current value of the charging signal exceeds the current threshold, the second charging control chip IC2 controls the second transistor Q2 to turn off. At this time, the charging circuit is cut off, which can prevent the battery 101 or the charging circuit from being damaged by excessive overcurrent, thus ensuring charging safety.

[0089] For example, the second transistor Q2 is a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor).

[0090] In this embodiment, a second charging control chip IC2 and a second transistor Q2 are provided, which work together with the first charging control chip IC1 and the first transistor Q1 to provide dual protection for the rechargeable battery assembly 10, thereby improving the charging safety and reliability of the rechargeable battery assembly 10.

[0091] In some embodiments of this application, connector 1022 is a board-to-board connector.

[0092] In this embodiment of the application, connector 1022 is specifically a board-to-board connector, that is, a BTB (board-to-board) connector 1022.

[0093] BTB connectors are characterized by high density, multiple contacts, and high connection reliability, which can improve connection reliability and thus improve the reliability of the rechargeable battery assembly 10.

[0094] In some embodiments of this application, an electronic device is provided that includes a rechargeable battery assembly 10 as provided in any of the above embodiments, and therefore includes all of its beneficial effects, which will not be repeated here to avoid repetition.

[0095] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0096] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A rechargeable battery assembly, characterized in that, include: A battery, the battery comprising a body, a first tab, and a second tab; A flexible circuit board is connected to the body. A first end of the flexible circuit board is electrically connected to a first tab and a second tab. A second end of the flexible circuit board includes a connector located between the first tab and the second tab. The connector is used to receive a charging signal for charging the battery. A colloid that connects the body and the flexible circuit board, and the colloid is used to dissipate heat from the flexible circuit board; The flexible circuit board is disposed between the first electrode tab and the second electrode tab, and the flexible circuit board extends along the length direction of the body; A portion of the flexible circuit board is attached to the body, and another portion of the flexible circuit board extends out of one end of the body along the length of the body. The connector is located on the portion of the flexible circuit board that extends out of the body.

2. The rechargeable battery assembly according to claim 1, characterized in that, The battery also includes a printed circuit board, which is connected to the main body. The side of the printed circuit board facing the main body is the back side of the printed circuit board. A first pad, a second pad, and a third pad are provided on the back side of the printed circuit board, and the second pad is located between the first pad and the third pad. The first electrode is electrically connected to the first pad, the second electrode is electrically connected to the third pad, and the flexible circuit board is electrically connected to the second pad.

3. The rechargeable battery assembly according to claim 2, characterized in that, The colloid covers the first tab and the second tab, and covers at least a portion of the flexible circuit board and at least a portion of the printed circuit board.

4. The rechargeable battery assembly according to claim 2, characterized in that, The colloid is formed through an injection molding sealing process.

5. The rechargeable battery assembly according to claim 2, characterized in that, Printed circuit boards also include: A detection resistor is provided, with its first end electrically connected to the second electrode and its second end electrically connected to the flexible circuit board. The detection resistor is used to detect the current value of the charging signal.

6. The rechargeable battery assembly according to claim 5, characterized in that, Printed circuit boards also include: A first transistor, wherein a first terminal of the first transistor is electrically connected to a second terminal of the detection resistor, and a second terminal of the first transistor is electrically connected to the flexible circuit board; A first charging control chip, wherein a first terminal of the first charging control chip is electrically connected to a second terminal of the detection resistor, a second terminal of the first charging control chip is electrically connected to a third terminal of the first transistor, and a third terminal of the first charging control chip is electrically connected to the first electrode.

7. The rechargeable battery assembly according to claim 6, characterized in that, Printed circuit boards also include: The second transistor has a first terminal electrically connected to the second terminal of the first transistor, and the second terminal of the second transistor is electrically connected to the flexible circuit board. The second charging control chip has a first terminal electrically connected to the second terminal of the detection resistor, a second terminal electrically connected to the third terminal of the second transistor, and a third terminal electrically connected to the first electrode.

8. The rechargeable battery assembly according to any one of claims 1 to 7, characterized in that, The connector is a board-to-board connector.

9. An electronic device, characterized in that, include: The rechargeable battery assembly as described in any one of claims 1 to 8.

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