Protective plate assembly, battery assembly and electronic equipment

Abstract

The invention relates to a protection plate assembly, a battery assembly and electronic equipment, and relates to the technical field of electronic equipment. The protection plate assembly comprises a sampling resistor used for being connected with a battery cell of a battery assembly; the connector is used for being connected with the battery cell and the voltameter and acquiring an enable signal; the first protection module is respectively connected with the sampling resistor and the connector, is used for being connected with the battery cell, and is used for controlling the on-off state of a first power supply path between the battery cell and the connector based on a first sampling signal acquired by the sampling resistor; the switch module is respectively connected with the sampling resistor and the connector and is used for selecting a sampling path for conducting the electric quantity meter according to the enable signal; and the sampling path is used for transmitting a second sampling signal acquired by the sampling resistor to the voltameter through the connector under the condition that the sampling path is in a conducting state. Impedance of the protection plate can be reduced, so that energy consumption and cost are reduced, and charging performance is improved.

Description

Technical Field

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

[0002] With the rapid iteration of electronic devices and their continuously increasing charging speeds, the importance of impedance control in suppressing device heat generation and ensuring charging efficiency is becoming increasingly prominent. Therefore, the impedance design of electronic devices is gradually trending towards low-impedance optimization, reducing heat generation and path losses to meet the demands of faster charging speeds.

[0003] However, existing electronic devices still suffer from high impedance, which limits their charging speed and makes it difficult to meet users' needs for fast charging. Summary of the Invention

[0004] This application provides a protection board assembly, a battery assembly, and an electronic device that can reduce the impedance of the protection board, thereby reducing energy consumption and cost, and improving charging performance.

[0005] A protection board assembly is applied to a battery assembly, the protection board assembly comprising:

[0006] A sampling resistor is used to connect to the cells of the battery assembly;

[0007] A connector for connecting to the battery cell and the fuel gauge, and for acquiring an enable signal;

[0008] The first protection module is connected to the sampling resistor and the connector respectively, and is used to connect to the battery cell and to control the on / off state of the first power supply path between the battery cell and the connector based on the first sampling signal collected by the sampling resistor.

[0009] A switching module, connected to the sampling resistor and the connector respectively, is used to select and activate the sampling path of the fuel meter according to the enable signal; the sampling path is used to transmit the second sampling signal collected by the sampling resistor to the fuel meter via the connector when the circuit is activated.

[0010] A battery assembly includes a battery cell and a protection board assembly as described above.

[0011] An electronic device includes a motherboard and a battery assembly as described above, the motherboard including at least a fuel gauge and a control module, wherein a switching module in the battery assembly is connected to the fuel gauge and the control module via a connector, and the control module is used to provide an enable signal in a powered state.

[0012] The aforementioned protection board assembly, battery assembly, and electronic device include a protection board assembly comprising a sampling resistor, a connector, a first protection module, and a switch module. The sampling resistor is used to connect to the battery cell of the battery assembly; the connector is used to connect to the battery cell and the fuel gauge, and is used to acquire an enable signal; the first protection module is connected to both the sampling resistor and the connector, and is used to control the on / off state of the first power supply path between the battery cell and the connector based on the first sampling signal acquired by the sampling resistor; the switch module is connected to both the sampling resistor and the connector, and is used to select the sampling path of the fuel gauge to be turned on according to the enable signal; the sampling path is used to transmit the second sampling signal acquired by the sampling resistor to the fuel gauge via the connector when the circuit is on. This allows the first protection module and the fuel gauge to share a sampling resistor, eliminating the need for separate sampling resistors (i.e., two separate sampling resistors) for the first protection module and the fuel gauge. Compared to related technologies where a separate sampling resistor is used for the protection circuit and another for the fuel gauge, this reduces the number of sampling resistors, thereby reducing the protection board impedance and component cost, and consequently reducing charging path losses, thus contributing to improved charging performance of the electronic device. Furthermore, the protection board assembly of this application controls the on / off state of the switch module through an enable signal, thereby achieving effective control of the sampling path of the fuel gauge. Therefore, an effective enable signal can only be obtained to conduct the sampling path when the sampling line of the fuel gauge is in the latching state. This avoids the problem of short circuit and burnout of the sampling line caused by latching misalignment. In addition, the sampling path can be disconnected by the switch module, thereby cutting off the leakage path in the electronic device, thus avoiding leakage problems caused by the failure of low voltage protection, reducing the risk of battery pack bulging, and improving the safety and reliability of the battery pack. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 This is one of the structural schematic diagrams of an electronic device provided in an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the structure of an electronic device in a related technology;

[0016] Figure 3 This is a schematic diagram of the structure of another electronic device;

[0017] Figure 4 This is a second schematic diagram of the structure of an electronic device provided in an embodiment of this application;

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

[0019] Figure 6 This is the fourth schematic diagram of the structure of an electronic device provided in the embodiments of this application;

[0020] Figure 7 This is the fifth schematic diagram of the structure of an electronic device provided in the embodiments of this application;

[0021] Figure 8 This is the sixth schematic diagram of the structure of an electronic device provided in the embodiments of this application;

[0022] Figure 9 This is the seventh schematic diagram of the structure of an electronic device provided in the embodiments of this application;

[0023] Figure 10 This is the eighth schematic diagram of the structure of an electronic device provided in the embodiments of this application;

[0024] Figure 11 This is the ninth schematic diagram of the structure of an electronic device provided in the embodiments of this application;

[0025] Figure 12 This is the tenth schematic diagram of the structure of an electronic device provided in the embodiments of this application.

[0026] Explanation of icon numbers:

[0027] 10. Protection board assembly; 110. Switch module; 120. First protection module; 130. Connector; 140. Second protection module; 150. Detection module; 20. Main board; 210. Fuel meter; 220. Control module; 31. Memory; 311. Operating system; 312. Communication module; 313. Global positioning system module; 32. Processing circuit; 33. Peripheral device interface; 36. Input / output subsystem; 361. User push button; 39. Signal line. Detailed Implementation

[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0029] 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 is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0031] It is understood that the term "connection" in the following embodiments can be a direct connection or an indirect connection. If the connected circuits, modules, units, etc., transmit electrical signals or data to each other, it should be understood as an "electrical connection," "communication connection," etc.

[0032] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0033] When used herein, 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 the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0034] The protection board assembly and battery assembly provided in this application can both be applied to electronic devices. Electronic devices can be, but are not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, projection devices, etc. Portable wearable devices can include smartwatches, smart bracelets, head-mounted devices, etc. Head-mounted devices can include virtual reality (VR) devices, augmented reality (AR) devices, smart glasses, etc.

[0035] In some exemplary embodiments, such as Figure 1As shown, a protection board assembly 10 is provided for use in a battery assembly. The protection board assembly 10 includes a sampling resistor Rs, a connector 130, a first protection module 120, and a switch module 110.

[0036] The sampling resistor Rs is used to connect to the battery cell BAT of the battery assembly. The first terminal of the sampling resistor Rs can be connected to either the positive or negative terminal of the battery cell BAT; that is, the first terminal of the sampling resistor Rs can be connected to either terminal of the battery cell BAT. In some exemplary embodiments, the sampling resistor Rs includes a single resistor, for example, the resistance value of which can be 1mΩ. In other exemplary embodiments, the sampling resistor Rs includes at least two resistors connected in parallel, for example, each of the two parallel resistors can have a resistance value of 2mΩ. In applications, the resistance value of the sampling resistor Rs and the number of components can be set according to factors such as sampling accuracy and device cost, and are not limited in detail here.

[0037] Connector 130 is used to connect to the battery cell BAT. Connector 130 can be connected directly or indirectly to the battery cell BAT. Connector 130 is used to acquire an enable signal EN. The enable signal EN is used to control the on / off state of the switching module 110. In some exemplary embodiments, the enable signal EN can be provided by an external device. For example, connector 130 can be connected to the motherboard 20 of an electronic device, and connector 130 can be used to acquire the enable signal EN provided by the motherboard 20.

[0038] The first protection module 120 is connected to the sampling resistor Rs and the connector 130, and is also used to connect to the battery cell BAT. The first terminal of the first protection module 120 is connected to the first terminal of the sampling resistor Rs, the second terminal of the first protection module 120 is connected to the second terminal of the sampling resistor Rs, and the third terminal of the first protection module 120 is connected to the connector 130. The first protection module 120 can be connected to the battery cell BAT via the sampling resistor Rs, or it can be directly connected to the battery cell BAT. The first protection module 120 is connected in series in the first power supply path between the battery cell BAT and the connector 130. The first protection module 120 is used to control the on / off state of the first power supply path between the battery cell BAT and the connector 130 based on the first sampling signal acquired by the sampling resistor Rs. The first protection module 120 can control the first power supply path to disconnect when the voltage value of the first sampling signal exceeds a preset voltage range. The first protection module 120 can also control the first power supply path to conduct when the voltage value of the first sampling signal is within the preset voltage range. If the voltage value of the first sampling signal exceeds the preset voltage range, it indicates that the battery module is in an abnormal condition, such as overcharging, over-discharging, short circuit, or undervoltage. In this case, the first power supply path is disconnected to ensure the safe use of the battery module and electronic equipment. If the voltage value of the first sampling signal is within the preset voltage range, it indicates that the battery module is in a normal condition. In this case, the first power supply path is turned on to ensure the normal charging and discharging of the battery module to power the electronic equipment.

[0039] Switch module 110 is connected to sampling resistor Rs and connector 130 respectively. One first terminal of switch module 110 can be connected to the first terminal of sampling resistor Rs, and the other first terminal of switch module 110 can be connected to the second terminal of sampling resistor Rs; the two second terminals of switch module 110 can be connected to connector 130 respectively. Switch module 110 is connected in series in the sampling path of battery cell BAT connected to fuel gauge 210 via connector 130. Figure 1The sampling path includes a CSP sampling path and a CSN sampling path. The CSP sampling path connects the first terminal of the sampling resistor Rs to the fuel gauge 210 via a CSP sampling line through the switch module 110 and connector 130. The CSN sampling path connects the second terminal of the sampling resistor Rs to the fuel gauge 210 via a CSN sampling line through the switch module 110 and connector 130. The switch module 110 selects the sampling path of the fuel gauge 210 to be activated based on the enable signal EN. The enable signal EN can include a valid enable signal EN and an invalid enable signal EN. The switch module 110 can activate the sampling path in response to a valid enable signal EN. When activated, the sampling path transmits the second sampling signal collected by the sampling resistor Rs to the fuel gauge 210 via connector 130. The switch module 110 can deactivate the sampling path in response to an invalid enable signal EN. The switch module 110 can also deactivate the sampling path if no enable signal EN is received. The power meter 210 can be installed on the motherboard 20 of the electronic device. The power meter 210 is used to determine the battery power based on the second sampling signal.

[0040] The protection board assembly 10 provided in the above embodiment includes a sampling resistor Rs, a connector 130, a first protection module 120, and a switch module 110. The sampling resistor Rs is used to connect to the battery cell BAT of the battery assembly; the connector 130 is used to connect to the battery cell BAT and the fuel gauge 210, and is used to acquire an enable signal EN; the first protection module 120 is connected to the sampling resistor Rs and the connector 130 respectively, and is used to control the on / off state of the first power supply path between the battery cell BAT and the connector 130 based on the first sampling signal acquired by the sampling resistor Rs; the switch module 110 is connected to the sampling resistor Rs and the connector 130 respectively, and is used to select the sampling path of the fuel gauge 210 to be turned on according to the enable signal EN; the sampling path is used to transmit the second sampling signal acquired by the sampling resistor Rs to the fuel gauge 210 through the connector 130 when the sampling path is in the on state. In this way, the first protection module 120 and the fuel gauge 210 share the sampling resistor Rs, eliminating the need to set separate sampling resistors Rs for the first protection module 120 and the fuel gauge 210, i.e., two sampling resistors Rs. This is in contrast to related technologies where a sampling resistor Rn1 is set for the protection circuit and a sampling resistor Rn2 is set for the fuel gauge 210 (e.g., ...). Figure 2As shown, the number of sampling resistors Rs is reduced, thereby lowering the protection board impedance and component cost, and consequently reducing charging path losses, which helps improve the charging performance of electronic devices. Furthermore, the protection board assembly 10 of this application controls the on / off state of the switch module 110 through the enable signal EN, thereby achieving effective control of the sampling path of the fuel gauge 210. Therefore, a valid enable signal EN can only be obtained to conduct the sampling path when the sampling line of the fuel gauge 210 is in the latching state. This avoids short circuits and burnout of the sampling line caused by latching misalignment. In addition, the switch module 110 can disconnect the sampling path, thereby cutting off the leakage path in the electronic device, thus avoiding leakage problems caused by the failure of low-voltage protection, reducing the risk of battery pack bulging, and improving the safety and reliability of the battery pack.

[0041] Please continue reading. Figure 1 In some exemplary embodiments, the first power supply path is a path from the first pole of the battery cell BAT through the first protection module 120 to the connector 130. Specifically, the first pole of the battery cell BAT can be connected to the connector 130 via the first protection module 120 to form the first power supply path. Figure 1 In this configuration, the first power supply path is the power supply path corresponding to the negative terminal of the battery cell BAT. A second power supply path is formed between the second terminal of the battery cell BAT and the connector 130. Specifically, the second terminal of the battery cell BAT can be connected to the connector 130 to form the second power supply path. Figure 1 In this embodiment, the second power supply path is the power supply path corresponding to the positive terminal of the battery cell BAT, namely the VBAT power supply path. In this embodiment, one of the first and second terminals of the battery cell BAT is positive, and the other is negative. For ease of explanation, this embodiment uses the first terminal of the battery cell BAT as an example, where the first terminal is negative.

[0042] When the first power supply path is disconnected and the second power supply path is on, the sampling path is disconnected. In some exemplary embodiments, when the first power supply path is disconnected and the second power supply path is on, the switching module 110 may disconnect in response to an invalid enable signal EN output by the connector 130, thereby disconnecting the sampling path. Taking the protection board assembly 10 as an example of its application in electronic devices, the first power supply path, namely the VBAT power supply path, between the second pole of the battery cell BAT and the connector 130 is connected, while the second power supply path between the first pole of the battery cell BAT and the connector 130 is disconnected. For example, if the first protection module 120 disconnects the second power supply path in an undervoltage / low-voltage state, the switch module 110 can disconnect in response to the invalid enable signal EN (e.g., the motherboard 20 can provide the invalid enable signal EN to the switch module 110 through the connector 130), thereby disconnecting the sampling circuit. This prevents current from flowing back from the first power supply path through the motherboard 20, the connector 130, and the second power supply path to the battery cell BAT. The leakage current is around 100uA, thereby avoiding the risk of battery component bulging due to continuous leakage in low-voltage scenarios, improving the safety and reliability of the battery component, and helping to extend the service life of the battery component.

[0043] In some other exemplary embodiments, connector 130 does not receive the enable signal EN. For example, when motherboard 20 is in a power-off or standby state, connector 130 does not receive the enable signal EN provided by motherboard 20. In this case, the control terminal of switch module 110 does not receive the enable signal EN, and the sampling path is disconnected. Taking the protection board assembly 10 as an example in the application of electronic devices, when the electronic device is in the transportation state (shipping state, shipmode), the first power supply path is disconnected and the second power supply path is connected. That is, the VBAT power supply path between the second pole of the battery cell BAT and the connector 130 is connected, and the second power supply path between the first pole of the battery cell BAT and the connector 130 is disconnected. Under this condition, the charging cell BAT chip in the main board 20 of the electronic device is in a de-energized state, that is, the working voltage VPH of the charging cell BAT chip is disconnected. Thus, the main board 20 is in a standby state, the connector 130 has no enable signal EN input, the switch module 110 is disconnected, and the sampling path is disconnected. This can prevent the current from flowing back from the first power supply path through the main board 20, the connector 130 and the second power supply path to the battery cell BAT. This can avoid the risk of battery component bulging due to continuous leakage in the transportation scenario, improve the safety and reliability of the battery component, and help to improve the service life of the battery component.

[0044] It is understandable that if... Figure 2 In the related technology shown, the sampling resistor Rs is reduced to one, that is, the sampling resistor Rn2 of the fuel meter is removed, and the sampling resistor Rn1 is retained, resulting in the following... Figure 3In the structure shown, the fuel gauge is directly connected to the sampling resistor Rn via the CSP and CSN sampling lines through a connector. In the aforementioned low-voltage and transportation scenarios, current will flow back from the first power supply path through the motherboard, connector, and second power supply path to the battery cell BAT, leading to continuous leakage and a risk of battery module bulging. To address this, the protection board assembly provided in this application controls the sampling path to disconnect when the first power supply path is disconnected and the second power supply path is connected, thereby breaking the leakage circuit and preventing leakage. This improves the safety and reliability of the battery module and helps extend its lifespan.

[0045] Please continue reading. Figure 1 In some exemplary embodiments, when the protection board assembly 10 is in the engaged state, the sampling path is either on or off. For example, the switch module 110 may engage in response to a valid enable signal EN; the switch module 110 may disengage in response to an invalid enable signal EN, or the switch module 110 may not receive an enable signal EN, thus disengaging the sampling path. When the protection board assembly 10 is in the disengaged state, the sampling path is off. For example, the switch module 110 may disengage in response to an invalid enable signal EN, or the switch module 110 may not receive an enable signal EN.

[0046] Taking the protection board assembly 10 as an example of its application in an electronic device, the protection board assembly 10 is in a snap-fit ​​state, which can be understood as the protection board assembly 10 being snap-fitted to other components in the electronic device, such as the motherboard 20. In this state, the connector 130 in the protection board assembly 10 can be connected to the motherboard 20 in the electronic device, so that the battery assembly can supply power to the motherboard 20 through the connector 130. In the power-on state, the motherboard 20 can provide an enable signal EN to the protection board assembly 10 through the connector 130. In response, the switch module 110 can be turned on in response to a valid enable signal EN and turned off in response to an invalid enable signal EN. In this way, the sampling path of the fuel gauge 210 can be controlled by the enable signal EN, thereby realizing effective control of the working state of the fuel gauge 210.

[0047] When the protection board assembly 10 is in a non-engaged state, it can be understood that the protection board assembly 10 is not engaged with other components in the electronic device, such as the motherboard 20. In this state, the connector 130 in the protection board assembly 10 is disconnected from the motherboard 20 in the electronic device, or the protection assembly and the motherboard 20 are misaligned. As a result, the motherboard 20 is powered off, the connector 130 cannot obtain the enable signal EN, and the switch module 110 is disconnected. Thus, the sampling path of the fuel gauge 210 is disconnected, which can prevent the sampling line from the battery cell BAT from short-circuiting and burning out.

[0048] It is understandable that, such as Figure 3As shown, if the fuel gauge 210 is directly connected to the sampling resistor Rs via connector 130, the sampling line will burn out if at least one of the sampling lines CSP and CSN of the fuel gauge 210 is short-circuited with the VBAT sampling line, or if there is a misalignment during engagement. To address this, the protection board assembly 10 provided in this application disconnects the sampling path when the protection board is in an unengaged state, effectively preventing burnout caused by misalignment or a broken sampling line, thus improving safety and reliability.

[0049] like Figure 1 , Figures 4 to 9 As shown, in some exemplary embodiments, the sampling path includes a first sampling path and a second sampling path, such as the CSP sampling path and the CSN sampling path in the figure. The switching module 110 includes a first switching unit and a second switching unit.

[0050] In this configuration, the first terminal of the first switching unit is connected to the first terminal of the sampling resistor Rs, the second terminal of the first switching unit is connected to the first terminal of connector 130, and the control terminal of the first switching unit is connected to the second terminal of connector 130. The first terminal of connector 130 is used to connect to the first terminal of the fuel gauge 210. The first switching unit is used to select and activate the first sampling path of the fuel gauge 210 according to the enable signal EN. The first sampling path is the path from the first terminal of the sampling resistor Rs through the first switching unit and connector 130 to the first terminal of the fuel gauge 210, as shown in the CSP sampling path diagram. The second terminal of connector 130 is used to output the enable signal EN. For example, connector 130 can transmit the enable signal EN provided by the motherboard 20 to the control terminal of the first switching unit through the second terminal of connector 130.

[0051] The first terminal of the second switching unit is connected to the second terminal of the sampling resistor Rs, the second terminal of the second switching unit is connected to the third terminal of connector 130, and the control terminal of the second switching unit is connected to the second terminal of connector 130. The third terminal of connector 130 is used to connect to the second terminal of the fuel gauge 210. The second switching unit is used to select and activate the second sampling path according to the enable signal EN. The second sampling path is the path from the second terminal of the sampling circuit through the second switching unit and connector 130 to the second terminal of the fuel gauge 210, as shown in the CSN sampling path diagram.

[0052] When both the first and second switching units are in the ON state, the sampling path is ON, meaning both the first and second sampling paths are ON. In this case, the fuel gauge 210 can determine the battery level based on the second sampling signal acquired by the sampling resistor Rs. When the first and / or second switching units are in the OFF state, i.e., the first and / or second sampling paths are OFF.

[0053] It should be noted that the above embodiment is illustrated by the example that the control terminals of both the first and second switching units are connected to the second terminal of connector 130. In other embodiments, the control terminals of the first and second switching units can be connected to different terminals of connector 130. In this way, enable signals EN can be independently output to the two switching units through different terminals of connector 130, enabling independent control of the on / off states of the two switching units. In application, a suitable setting method can be selected according to requirements.

[0054] The protection board assembly 10 provided in the above embodiment controls the on / off state of the first sampling path of the fuel gauge 210 based on the enable signal EN through the first switching unit, and controls the on / off state of the second sampling path of the fuel gauge 210 based on the enable signal EN through the second switching unit. In this way, the on / off state of the sampling path of the fuel gauge 210 can be effectively controlled, which provides technical support to avoid short circuit and burnout of the sampling line caused by misalignment, and to avoid leakage caused by failure of low voltage protection, thereby improving the safety and reliability of the battery assembly.

[0055] In some exemplary embodiments, such as Figures 7 to 9 As shown, the first switching unit includes a first switching transistor Q1. The first terminal of the first switching transistor Q1 is connected to the first end of the sampling resistor Rs, the second terminal of the first switching transistor Q1 is connected to the first end of the connector 130, and the gate of the first switching transistor Q1 is connected to the second end of the connector 130. The enable signal EN includes a valid enable signal EN and a invalid enable signal EN. The first switching transistor Q1 turns on in response to the valid enable signal EN output from the second end of the connector 130, and the second switching transistor Q2 turns off in response to the invalid enable signal EN output from the second end of the connector 130.

[0056] The second switching unit includes a second switching transistor Q2. The first terminal of the second switching transistor Q2 is connected to the second terminal of the sampling resistor Rs, the second terminal of the second switching transistor Q2 is connected to the third terminal of the connection, and the gate of the second switching transistor Q2 is connected to the second terminal of connector 130. The second switching transistor Q2 is turned on in response to a valid enable signal EN output from the second terminal of connector 130. The first switching transistor Q1 and the second switching transistor Q2 are turned off in response to an invalid enable signal EN output from the second terminal of connector 130.

[0057] Both the first switch Q1 and the second switch Q2 can be transistors. In some exemplary embodiments, both the first switch Q1 and the second switch Q2 are NMOS (Metal-Oxide-Semiconductor Field-Effect Transistor), corresponding to a high-level state for the active enable signal EN and a low-level state for the inactive enable signal EN. In other exemplary embodiments, both the first switch Q1 and the second switch Q2 are PMOS, corresponding to a low-level state for the active enable signal EN and a high-level state for the inactive enable signal EN. One of the first and second terminals of the first switch Q1 and the second switch Q2 can be the source, and the other can be the drain. In applications, the first switch Q1 and the second switch Q2 can also be other types of transistors, which can be set according to requirements and are not limited here.

[0058] The protection board assembly 10 provided in the above embodiment controls the on / off state of the first sampling path of the fuel gauge 210 through the first switch Q1 based on the enable signal EN, and controls the on / off state of the second sampling path of the fuel gauge 210 through the second switch Q2 based on the enable signal EN. In this way, the on / off state of the sampling path of the fuel gauge 210 can be effectively controlled, which provides technical support to avoid short circuit and burnout of the sampling line caused by misalignment, and to avoid leakage caused by failure of low voltage protection, thereby improving the safety and reliability of the battery assembly.

[0059] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the switch module 110 further includes a first capacitor unit (such as C1 and C2) and a second capacitor unit (such as C3 and C4). The first capacitor unit is connected in series between a first terminal and a second terminal of the first switch unit. The first terminal of the first capacitor unit is connected to the first terminal of the first switch unit, and the second terminal of the first capacitor unit is connected to the second terminal of the first switch unit. The first capacitor unit is also connected in series between a first terminal and a second terminal of the second switch unit. The first terminal of the second capacitor unit is connected to the first terminal of the second switch unit, and the second terminal of the second capacitor unit is connected to the second terminal of the second switch unit.

[0060] In this embodiment, by connecting a first capacitor unit in series between the first and second terminals of the first switching unit, the voltage between the first and second terminals of the first switching unit can be kept stable, which helps to improve the anti-static performance of the first switching unit, such as the first switching transistor Q1; and by connecting a second capacitor unit in series between the first and second terminals of the second switching unit, the voltage between the first and second terminals of the second switching unit can be kept stable, which helps to improve the anti-static performance of the second switching unit, such as the second switching transistor Q2.

[0061] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the first capacitor unit and the second capacitor unit may include one capacitor or multiple capacitors connected in series. The first capacitor unit includes a first capacitor C1 and a second capacitor C2, which are connected in series between the first and second terminals of the first switching transistor Q1. The second capacitor unit includes a third capacitor C3 and a fourth capacitor C4, which are connected in series between the first and second terminals of the second switching transistor Q2. The first capacitor unit, by including multiple capacitors connected in series, can have a relatively large capacitance, thereby effectively removing current spikes and stabilizing the voltage. The second capacitor unit, by including multiple capacitors connected in series, can have a relatively large capacitance, thereby effectively removing current spikes and stabilizing the voltage.

[0062] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the switch module 110 further includes a first resistor R1 and a second resistor R2. The first resistor R1 is connected in series between the second terminal of the first switch unit and the first terminal of the connector 130. The second resistor R2 is connected in series between the second terminal of the second switch unit and the third terminal of the connector 130. Thus, the first switch unit can be protected by the first resistor R1, and the second switch unit can be protected by the second resistor R2, suppressing transient overvoltages in the circuit, such as electrostatic discharge or surge impacts, thereby preventing device damage and contributing to improved reliability of the protection board assembly 10.

[0063] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the protection board assembly 10 further includes a third resistor R3, which is connected in series between the first terminal of the sampling resistor Rs and the control terminal of the switching module 110. For example, the third resistor R3 may be connected in series between the first terminal of the sampling resistor Rs and the control terminal of the first switching unit, such as the first switching transistor Q1, and the control terminal of the second switching unit, such as the second switching transistor Q2. The third resistor R3 can improve the anti-static performance of the switching module 110 (including the first switching unit and the second switching unit).

[0064] Please continue reading. Figures 7 to 9In some exemplary embodiments, the protection board assembly 10 further includes at least one of a fourth resistor R4 and a first diode D1. The fourth resistor R4 is connected in series between the control terminal of the switch module 110 and the second terminal of the connector 130. For example, the fourth resistor R4 can be connected in series between the control terminal of the first switching unit (e.g., the gate of the first switching transistor Q1) and the control terminal of the second switching unit (e.g., the gate of the second switching transistor Q2) and the second terminal of the connector 130, respectively. The second terminal of the connector 130 is used to output an enable signal EN. The control terminal of the switch module 110 and the second terminal of the connector 130 are grounded through the first diode D1. Exemplarily, the first diode D1 includes a transient voltage suppressor (TVS) diode. For example, the first diode D1 can be a bidirectional TVS diode. In applications, either the fourth resistor R4 or the first diode D1 can be used, or both the fourth resistor R4 and the first diode D1 can be used. The appropriate setting method can be selected according to the protection requirements, and no further limitations are imposed here. Thus, by setting the fourth resistor R4 and / or the first diode D1, transient overvoltages in the circuit, such as electrostatic discharge or surge impacts, can be suppressed, which can protect the switching module 110, such as the first switch and the second switching transistor Q2, thereby avoiding device damage and helping to improve the reliability of the protection board assembly 10.

[0065] Next, the first protection module 120 provided in the embodiments of this application will be described in detail.

[0066] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the first protection module 120 includes a first control chip U1 and a gating unit (Q3 and Q4 as shown in the figure). The gating unit is connected in series between the first terminal of the battery cell BAT and the connector 130. The first control chip U1 is connected to a sampling resistor Rs to acquire a first sampling signal based on the sampling resistor Rs. If the voltage value of the first sampling signal is greater than or equal to a preset first threshold voltage, the first control chip U1 controls the gating unit to disconnect. The sampling resistor Rs is a current sensing module; therefore, when a detection current flows through the sampling resistor Rs, the first control chip U1 can acquire the first sampling signal based on the sampling resistor Rs. The gating unit may include, but is not limited to, a MOSFET, and may also be referred to as a protection MOSFET.

[0067] In this embodiment, if the detected voltage of the first sampling signal exceeds a preset voltage range, it indicates a battery component malfunction. Since the gating unit is connected in series between the first terminal of the battery cell BAT and the connector 130, if the detected voltage of the first sampling signal exceeds the preset voltage range, the first control chip U1 controls the gating unit to disconnect, thus disconnecting the connector 130 from the first terminal of the battery cell BAT. When the battery component receives external charging voltage or charging current, the first control chip U1 controls the gating unit to disconnect, preventing the battery cell BAT from continuing to receive external charging voltage or current through its first terminal and connector 130, thereby ensuring the safety of the battery component. When the battery component is used to power electrical devices, the first control chip U1 controls the gating unit to disconnect, preventing the battery cell BAT from continuing to power the electrical devices through its first terminal and connector 130, thereby ensuring the safety of the electrical devices.

[0068] Understandably, if the detection voltage of the first sampling signal is within a preset voltage range, the first control chip U1 controls the first switch S1 to turn on. When a gating unit is included between the first pole and the connector 130 but not other switches, the first control chip U1 controls the gating unit to turn on, and the battery assembly can receive external charging voltage or charging current to the battery cell BAT; when the battery assembly supplies power to the electrical device, the battery cell BAT can supply power to the electrical device.

[0069] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the gating unit may include a third switch Q3 and a fourth switch Q4 connected in parallel. The total resistance of the third switch Q3 and the fourth switch Q4 connected in parallel is less than the resistance of any one of the third switch Q3 and the fourth switch Q4, thereby helping to reduce the energy loss caused by setting the gating unit in the protection board assembly 10.

[0070] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the first control chip U1 includes a first port VM, a second port CHG, a third port DSG, a fourth port GND, a fifth port VDD, and a sixth port VI. In the first control chip U1, the first port VM is connected to connector 130; the second port CHG is connected to one control terminal of the gating unit; the third port DSG is connected to the other control terminal of the gating unit; the fourth port GND is electrically connected to the first terminal of the sampling resistor Rs; the fifth port VDD is connected to the second terminal of the battery cell BAT; and the sixth port VI is connected to the second terminal of the sampling resistor Rs. In this embodiment, the fourth port GND and the sixth port VI can acquire a first sampling signal based on the sampling resistor Rs to detect the voltage across the sampling resistor Rs. Thus, the electrical connection relationship between the first control chip U1, the detection resistor, and the gating unit is simple and easy to implement, facilitating the control of the gating unit's state based on the voltage value of the first sampling signal.

[0071] Please continue reading. Figures 7 to 9 Furthermore, in some exemplary embodiments, the first protection module 120 further includes a fifth resistor R5 and a third capacitor unit (labeled C4 and C6 in the figure). One end of the fifth resistor R5 is connected to the second terminal of the battery cell BAT, and the other end of the fifth resistor R5 is connected to the fifth port VDD of the first control chip U1 and the first end of the third capacitor unit. The second end of the third capacitor unit is connected to the first end of the sampling resistor Rs and the fourth port GND of the first control chip U1. The fifth resistor R5 can stabilize the current of the protection board assembly 10. The third capacitor unit can filter out glitches in the current and play a role in stabilizing the voltage. It can be seen that the first protection module 120 provided in this application embodiment also includes a fifth resistor R5 and a third capacitor unit, and the fifth resistor R5 and the third capacitor unit cooperate with each other to achieve the effect of stabilizing voltage and current.

[0072] Please continue reading. Figures 7 to 9 For example, the third capacitor unit includes one or more capacitors connected in series. The third capacitor unit includes a fifth capacitor C5 and a sixth capacitor C6 connected in series. The inclusion of multiple capacitors in series in the third capacitor unit allows it to have a relatively large capacitance, thereby effectively removing current spikes and stabilizing the voltage.

[0073] Please continue reading. Figures 7 to 9 Furthermore, in some exemplary embodiments, the first protection module 120 may also include a seventh capacitor C7, which may be connected in series across the sampling resistor Rs. The seventh capacitor C7 can stabilize the voltage across the sampling resistor Rs, making the voltage values ​​of the first sampling signal and the second sampling signal acquired based on the sampling resistor Rs more stable, thereby improving the detection accuracy.

[0074] Please continue reading. Figures 4 to 9 In some exemplary embodiments, the protection board assembly 10 further includes a second protection module 140. The second protection module 140 is connected in series in the second power supply path between the second terminal of the battery cell BAT and the connector 130. The second protection module 140 is also used to control the on / off state of the second power supply path. The second protection module 140 can detect whether the voltage of the battery cell BAT exceeds a preset voltage threshold. If so, it indicates an abnormality in the battery assembly, and the second power supply path is disconnected to ensure the safety of the battery assembly and electronic equipment. If not, it indicates that the battery assembly is normal, and the second power supply path is turned on to ensure the normal charging and discharging of the battery assembly to power the electronic equipment.

[0075] Please continue reading. Figures 7 to 9In some exemplary embodiments, the second protection module 140 includes at least a fuse F1. The first end of the fuse F1 is connected to the second terminal of the battery cell BAT, and the second end of the fuse F1 is connected to the connector 130. The fuse F1 can control the on / off state of the second power supply path according to the magnitude of the current flowing through it. The fuse F1 can conduct when the detected current is within the normal range, thereby connecting the second power supply path; the fuse F1 can also blow when an overcurrent is detected, thereby cutting off the second power supply path, thus providing protection. The first power supply path is the path from the first terminal of the battery assembly through the first protection module 120 to the connector 130. That is, the first protection module 120 can be connected in series between the first terminal of the battery assembly and the connector 130. By controlling the on / off state of the first power supply path through the first protection module 120, a two-level protection mechanism is formed with the second protection module 140, further improving the safety and reliability of the battery assembly.

[0076] Please see Figure 1 , Figure 6 and Figure 7 In some exemplary embodiments, the sampling resistor Rs is connected in series in the first sub-power supply path between the first terminal (e.g., the negative terminal) of the battery cell BAT and the first protection module 120. The first power supply path includes the first sub-power supply path. That is, the sampling resistor Rs can be located in the first power supply path corresponding to the first terminal of the battery cell BAT.

[0077] The second power supply path includes a second sub-power supply path and a third sub-power supply path. The second sub-power supply path is the path between the second pole of the battery cell BAT and the second protection module 140, and the third sub-power supply path is the path between the second protection module 140 and the connector 130.

[0078] Please see Figure 4 and Figure 8 In other exemplary embodiments, the sampling resistor Rs is connected in series in the second sub-power supply path between the second terminal (e.g., the positive terminal) of the battery cell BAT and the second protection module 140. For example, the sampling resistor Rs is connected in series in the second sub-power supply path between the second terminal of the battery cell BAT and the first terminal of the fuse F1. That is, the sampling resistor Rs can be located in the second power supply path corresponding to the second terminal of the battery cell BAT.

[0079] Please see Figure 5 and Figure 9 In some other exemplary embodiments, the sampling resistor Rs is connected in series in the third sub-power supply path between the second protection module 140 and the connector 130. For example, the sampling resistor Rs can be located in the second power supply path corresponding to the second pole of the battery cell BAT.

[0080] As can be seen from the above, the sampling resistor Rs can be flexibly set on either the power supply path corresponding to the positive terminal or the power supply path corresponding to the negative terminal of the battery module, both of which can effectively detect the state of the battery module. It has wide applicability, and the appropriate position of the sampling resistor Rs can be set according to actual needs. In related technologies, such as... Figure 2 As shown, the routing path of the two sampling resistors Rs scheme is from the sampling resistor Rs of the first protection module 120 through the first protection module 120 to the sampling resistor Rs of the power meter 210. However, in this application, the routing loop of the sampling resistor Rs is from the sampling resistor Rs to the first protection module 120. The routing can be shortened by 0.5~1mΩ, which helps to achieve miniaturization design.

[0081] Next, the second protection module 140 provided in the embodiments of this application will be described in detail.

[0082] Please continue reading. Figures 7 to 9 In some exemplary embodiments, the second protection module 140 includes a fuse F1, and may also include a second control chip U2, a fifth switch Q5, a sixth resistor R6, a seventh resistor R7, and a fourth capacitor unit (C7 and C8 as shown in the figure). The first terminal of fuse F1 is connected to the second terminal of battery cell BAT, the second terminal of fuse F1 is connected to the first terminal of the fifth switch Q5, and the third terminal of fuse F1 is connected to connector 130. The second control chip U2 includes a first port NC, a second port OUT, a third port DS, a fourth port VSS, a fifth port VDD, and a sixth port NC. In the second control chip U2, the second port OUT is connected to the gate of the fifth switch Q5 and the first terminal of the seventh resistor R7; the fourth port VSS and the sixth port NC are respectively connected to the first terminal of battery cell BAT and the second terminal of the seventh resistor R7; the fifth port VDD is connected to the second terminal of battery cell BAT through the sixth resistor R6; and the fifth port VDD is also connected to the first terminal of battery cell BAT through the fourth capacitor unit.

[0083] The sixth resistor, R6, stabilizes the current of the protection board assembly 10. It also limits the current flowing into the chip, preventing damage from surge currents during power-on, and provides voltage division and impedance matching. The seventh resistor, R7, is a pull-down resistor that lowers the gate potential of the fifth switch Q5 when the second control chip U2 has no output, ensuring reliable cutoff of Q5 and preventing false triggering caused by a floating gate. The fourth capacitor unit filters out current spikes, stabilizing the voltage.

[0084] Please continue reading. Figures 7 to 9In some exemplary embodiments, the fourth capacitor unit includes one or more capacitors connected in series. The fourth capacitor unit includes an eighth capacitor C8 and a ninth capacitor C9 connected in series. The inclusion of multiple capacitors in series in the fourth capacitor unit allows it to have a relatively large capacitance, thereby effectively removing current spikes and stabilizing the voltage.

[0085] Next, the connector 130 provided in the embodiments of this application will be described.

[0086] Please continue reading. Figures 7 to 9 In some exemplary embodiments, connector 130 includes a first connector J1 and a second connector J2. The first connector J1 is connected to the switch module 110 and is used to connect to the battery cell BAT. The first connector J1 is used to acquire an enable signal EN. Exemplarily, the first connector J1 is connected to the motherboard 20 of the electronic device, and the first connector J1 is used to acquire the enable signal EN provided by the motherboard 20. The second power supply path includes a path between the battery cell BAT and the first connector J1. For example, the second power supply path includes a path from the battery cell BAT through the fuse F1 in the second protection module 140 to the first connector J1. The second connector J2 is connected to both the first protection module 120 and the switch module 110. The second connector J2 is used to connect to the fuel gauge 210. The sampling path includes a path from the sampling resistor Rs through the switch module 110 and the second connector J2 to the fuel gauge 210.

[0087] For example, the first port of the first connector J1 (such as...) Figures 7 to 9 Pin 3) is connected to the control terminal of the switch module 110. The first port of the first connector J1 is used to output an enable signal EN to the control terminal of the switch module 110. The second port of the first connector J1 is connected to the second pole, i.e., the positive pole, of the battery cell BAT. A second power supply path is formed between the second port of the first connector J1 and the second pole of the battery cell BAT. The first port of the second connector J2 (as shown in the image) Figures 7 to 9 Pins 1-2 and 9-14 in the first protection module 120 are connected to the third terminal of the first protection module 120, such as the second terminal of the gating unit, i.e., the second poles of the third switch Q3 and the fourth switch Q4. The first terminal of the first protection module 120 is connected to the first pole (negative) of the battery cell BAT, thus allowing the first connector J1 to connect to the first pole of the battery cell BAT via the first protection module 120. The second port of the second connector J2 (e.g., ...) Figures 7 to 9 Pin 5 in the second connector J2 is connected to the second end of the first switch unit in the switch module 110, and the third port of the second connector J2 (e.g., pin 5) is connected to the second end of the first switch unit in the switch module 110. Figures 7 to 9 Pin 6) is connected to the second end of the second switch unit in the switch module 110.

[0088] Please continue reading. Figures 1 to 11 In some exemplary embodiments, the first connector J1 can be connected to one or more positive tabs of the battery cell BAT, and the second connector J2 can be connected to one or more negative tabs of the battery cell BAT through the first protection module 120. Figure 10 As shown, the first connector J1 can be connected to the two positive tabs of the battery cell BAT, and the second connector J2 can be connected to the two negative tabs of the battery cell BAT through the first protection module 120. In this way, the first connector J1 and the second connector J2 can form a dual connector 130 (positive-positive / negative-negative) structure.

[0089] like Figure 11 As shown, in some other exemplary embodiments, both the first connector J1 and the second connector J2 can be connected to the positive and negative terminals of the battery cell BAT. Thus, the first connector J1 and the second connector J2 can form a dual connector 130 (positive / negative) structure. In application, the connection method between each connector 130 and the battery cell BAT can be flexibly configured. This allows for the application of various connection structures, offering strong applicability and high flexibility.

[0090] like Figures 6 to 9 As shown, in some exemplary embodiments, both the first connector J1 and the second connector J2 are Board to Board (BTB) connectors 130.

[0091] In some exemplary embodiments, the first connector J1 and the second connector J2 can also be connected to the motherboard 20 of the electronic device, so as to connect the battery cell BAT to the motherboard 20 through the first connector J1 and the second connector J2, i.e., the dual connector 130, thereby supplying power to the devices on the motherboard 20 and providing signals such as the enable signal EN to the devices on the protection board assembly 10. This helps to improve the reliability and safety of the electronic device, and the dual connector 130 structure can shorten the wiring, simplify the layout, and help to achieve miniaturization design.

[0092] Please continue reading. Figures 6 to 9 In some exemplary embodiments, the protection board assembly 10 further includes a detection module 150. The detection module 150 is connected to both the first protection module 120 and the connector 130. The detection module 150 generates a protection board detection signal ID when the first power supply path is on. The protection board detection signal ID identifies the protection board assembly 10, thereby indicating the presence of the battery assembly and providing status information for the protection board assembly 10. For example, the protection board detection signal can be transmitted via the connector 130 to the motherboard 20 of the electronic device, and the motherboard 20 determines whether the protection board assembly 10 is present based on the protection board detection signal ID.

[0093] Please continue reading. Figures 6 to 9In some exemplary embodiments, the detection module 150 includes a third control chip U3, an eighth resistor R8, a ninth resistor R9, a second diode D2, a fifth capacitor unit (C11 and C12 as shown in the figure), and a tenth capacitor C10. In the third control chip U3, the first port SW1 can output a protection board detection signal through the eighth resistor R8; the first port can also be connected to connector 130 through the parallel ninth resistor R9 and the second diode D2; the second port VCC can be connected to the second terminal of the battery cell BAT through the tenth resistor R10; the second port VCC can also be connected to the third port, the fourth port, and the fifth port VSS through the fifth capacitor unit; the sixth port VDD can be connected to the third port VSS through the tenth capacitor C10, and the third port VSS is connected to connector 130.

[0094] The eighth resistor R8 stabilizes the protection board's detection signal and protects the third control chip U3. The ninth capacitor C9 and the second diode D2 improve the anti-static performance of the third control chip U3. For example, the second diode D2 may include a bidirectional TVS diode. The tenth resistor R10 stabilizes the current of the protection board assembly 10. Both the fifth capacitor unit and the tenth capacitor C10 filter out current spikes, stabilizing the voltage. For example, the fifth capacitor unit includes one or more capacitors connected in series. The fifth capacitor unit includes an eleventh capacitor C11 and a twelfth capacitor C12 connected in series. The fourth capacitor unit includes multiple capacitors connected in series, giving it a relatively large capacitance, which effectively removes current spikes and stabilizes the voltage.

[0095] Please continue reading. Figures 1 to 11 In some exemplary embodiments, a battery assembly is provided, including a battery cell BAT and a protection board assembly 10 as provided in any of the foregoing embodiments.

[0096] Please continue reading. Figures 1 to 11In some exemplary embodiments, an electronic device is provided, comprising a motherboard 20 and a battery assembly as described above. The motherboard 20 includes at least a fuel gauge 210 and a control module 220. A switch module 110 in the battery assembly is connected to the fuel gauge 210 and the control module 220 via a connector 130. The control module 220 provides an enable signal EN in a power-on state. Specifically, the second end of the switch module 110 is connected to the fuel gauge 210 via the connector 130, the control end of the switch module 110 is connected to the control module 220 via the connector 130, and the first end of the switch module 110 is connected to the battery cell BAT in the battery assembly. Thus, the fuel gauge 210 can determine the battery charge based on a second sampling signal acquired by a sampling signal when the sampling path is in a conducting state. The sampling path is the path from the battery cell BAT through the switch module 110 and the connector 130 to the fuel gauge 210. Under the control of the enable signal EN, the switch module 110 can select the on / off state of the first power supply path in the battery assembly, thereby controlling the power supply state of the motherboard 20. For example, the supply voltage of the control module 220 can be less than the power supply voltage, i.e., the voltage between the two poles of the battery cell BAT. For example, the supply voltage can be 3.0V. In this way, the switch module 110 will only be turned on after the battery is engaged and the control module 220 is started, ensuring that the switch module 110 is turned on before the fuel gauge 210 samples, without affecting the sampling of the fuel gauge 210, avoiding the use of internal signals of the battery pack to control the activation and conduction under low voltage.

[0097] Please continue reading. Figures 1 to 11 In some exemplary embodiments, an electronic device is provided, comprising a battery assembly and a motherboard 20. The battery assembly includes battery cells (BAT) and a protection board assembly 10. The protection board assembly 10 includes a sampling resistor Rs, a connector 130, a switch module 110, a first protection module 120, a second protection module 140, and a detection module 150. The motherboard 20 includes a fuel gauge 210 and a control module 220.

[0098] Connector 130 includes a first connector J1 and a second connector J2. The first connector J1 is connected to the control module 220 and receives an enable signal EN from the control module 220. The control module 220 can generate the enable signal EN based on a supply voltage such as 3.0V and transmit it to the first connector J1. The second connector J2 is connected to the fuel gauge 210.

[0099] The switching module 110 includes a first switching transistor Q1, a second switching transistor Q2, a first capacitor unit, a second capacitor unit, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first diode D1. The first capacitor unit includes a first capacitor C1 and a second capacitor C2 connected in series. The second capacitor unit includes a third capacitor C3 and a fourth capacitor C4 connected in series. The first diode D1 is a bidirectional TVS diode. Both the first switching transistor Q1 and the second switching transistor Q2 are NMOS transistors. The source S of the first switching transistor Q1 is connected to the first terminal of the sampling resistor Rs, the drain D of the first switching transistor Q1 is connected to pin 6 of the second connector J2 through the first resistor R1, and the gate G of the first switching transistor Q1 is connected to pin 3 of the first connector J1 through the fourth resistor R4. The resistance value of the fourth resistor R4 can be 1kΩ. The source S of the second switch Q2 is connected to the second terminal of the sampling resistor Rs. The drain D of the second switch Q2 is connected to pin 5 of the second connector J2 through the second resistor R2. The gate G of the second switch Q2 is connected to pin 3 of the first connector J1 through the fourth resistor R4. The first capacitor C1 and the second capacitor C2 are connected in series between the source S and the drain D of the first switch Q1. The third capacitor C3 and the fourth capacitor C4 are connected in series between the source S and the drain D of the second switch Q2. The third resistor R3 is connected in series between the source S and the gate G of the third switch Q3.

[0100] The first protection module 120 includes a first control chip U1, a selection unit, a fifth resistor R5, a third capacitor unit, and a seventh capacitor C7. The selection unit includes a third switch Q3 and a fourth switch Q4 connected in parallel. The third capacitor unit includes a fifth capacitor C5 and a sixth capacitor C6 connected in series. Both the third switch Q3 and the fourth switch Q4 are NMOS transistors. The parallel-connected third switch Q3 and fourth switch Q4 are connected in series between the negative terminal of the battery cell BAT and pins 1-2 and 9-14 of the second connector J2, respectively. In the first control chip U1, the first port VM is connected to pins 1-2 and 9-14 of the second connector J2 through a resistor; the second port CHG is connected to the first gate G1 of the third switch Q3 and the fourth switch Q4; the third port DSG is connected to the second gate G2 of the third switch Q3 and the fourth switch Q4; the fourth port GND is connected to the negative terminal of the battery cell BAT and the first end of the sampling resistor Rs; the fifth port VDD is connected to the positive terminal of the battery cell BAT through the fifth resistor R5, and the fifth port VDD is also connected to the negative terminal of the battery cell BAT through the fifth capacitor C5 and the sixth capacitor C6 connected in series; the sixth port VI is connected to the second end of the sampling resistor Rs; and a seventh capacitor C7 is connected in series between the fourth port GND and the sixth port VI.

[0101] The second protection module 140 includes a fuse F1, a second control chip U2, a fifth switch Q5, a sixth resistor R6, a seventh resistor R7, and a fourth capacitor unit. The fourth capacitor unit includes an eighth capacitor C8 and a ninth capacitor C9 connected in series. All fifth switches Q5 are NMOS transistors. The first terminal of fuse F1 is connected to the positive terminal of the battery cell BAT, the second terminal of fuse F1 is connected to the drain D of the fifth switch Q5, and the third terminal of fuse F1 is connected to pins 1-2 and 9-14 of the first connector J1. In the second control chip U2, the second port OUT is connected to the gate G of the fifth switch Q5 and the first terminal of the seventh resistor R7. The fourth port VSS and the sixth port NC are connected to the negative terminal of the battery cell BAT, the second terminal of the seventh resistor R7, and the source S of the fifth switch Q5, respectively. The fifth port VDD is connected to the positive terminal of the battery cell BAT through the sixth resistor R6, and the fifth port VDD is also connected to the negative terminal of the battery cell BAT through the eighth capacitor C8 and the ninth capacitor C9 connected in series.

[0102] The detection module 150 includes a third control chip U3, an eighth resistor R8, a ninth resistor R9, a second diode D2, a fifth capacitor unit, and a tenth capacitor C10. The fifth capacitor unit includes an eleventh capacitor C11 and a twelfth capacitor C12 connected in series. The second diode D2 is a bidirectional TVS diode. In the third control chip U3, the first port SW1 is connected to pin 7 of the second connector J2 via the eighth resistor R8, and when the first protection module 120 is in the ON state, the first port SW1 outputs a protection board detection signal ID. The first port SW1 can also be connected to pins 1-2 and 9-14 of the second connector J2 via the ninth resistor R9 and the second diode D2 connected in parallel. The second port VCC is connected to the positive terminal of the battery cell BAT via the tenth resistor R10, and the second port VCC is also connected to the third port VSS, the fourth port VSS, and the fifth port VSS via the eleventh capacitor C11 and the twelfth capacitor C12 connected in series. The sixth port VDD is connected to the third port VSS via the tenth capacitor C10, and the third port VSS is connected to pins 1-2 and 9-14 of the second connector J2.

[0103] like Figure 1 , Figure 6 and Figure 7 As shown, the sampling resistor Rs is connected in series between the negative terminal of the battery cell BAT and the selection unit. In this embodiment, the sampling resistor Rs is located on the first power supply path corresponding to the negative terminal of the battery cell BAT.

[0104] like Figure 4 and Figure 8 As shown, the sampling resistor Rs is connected in series between the negative terminal of the battery cell BAT and the fuse F1. In this embodiment, the sampling resistor Rs is located on the second sub-power supply path corresponding to the positive terminal of the battery cell BAT.

[0105] like Figure 5 and Figure 9 As shown, the sampling resistor Rs is connected in series between the fuse F1 and the first connector J1. In this embodiment, the sampling resistor Rs is located on the second sub-power supply path corresponding to the positive terminal of the battery cell BAT.

[0106] The value of the sampling resistor Rs can be 1mΩ.

[0107] When the CSP and CSN sampling lines are engaged, the sampling path from the sampling resistor Rs to the second connector J2 via the switch module 110 is open. When the CSP and CSN sampling lines are not engaged, the sampling path is closed.

[0108] In the electronic device provided in the above embodiment, the two sampling resistors Rs of the first protection module 120 and the fuel gauge 210 are simplified into a single sampling resistor Rs, achieving effective sharing of the sampling resistor Rs. Furthermore, by controlling the on / off state of the switch module 110 through the enable signal EN, effective control of the sampling path of the fuel gauge 210 is achieved. This avoids leakage current in the shipmode mode of the electronic device after the battery pack is under low-voltage protection, improving the storage time of the electronic device and reducing the risk of battery pack bulging. In addition, the on / off state of the sampling path of the fuel gauge 210 is controlled by the enable signal EN provided by the control module 220 in the motherboard 20. Therefore, the sampling path is only activated when the control module 220 is powered on, avoiding short-circuit burnout problems (such as short circuits caused by misalignment) and low-voltage activation risks in the sampling lines sampled from the battery cell BAT, further improving the safety and reliability of the electronic device. Compared to the scheme in related technologies where the first protection circuit and the fuel gauge 210 are each provided with a separate sampling resistor Rs, the electronic device provided in this embodiment can achieve a gain of 1.5~2mΩ in the protection board assembly 10 and layout wiring.

[0109] like Figure 12 As shown, further explanation will be given using a mobile phone as an example of the aforementioned electronic device. Specifically, as follows... Figure 12 As shown, the mobile phone may include a memory 31 (which optionally includes one or more computer-readable storage media), processing circuitry 32, a peripheral device interface 33, and an input / output (I / O) subsystem 36. These components optionally communicate via one or more communication buses or signal lines 39. Those skilled in the art will understand that... Figure 12 The mobile phone shown does not constitute a limitation on the mobile phone and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 12 The various components shown are implemented in hardware, software, or a combination of both, including one or more signal processing and / or application-specific integrated circuits.

[0110] Memory 31 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplary examples include software components stored in memory 31 such as an operating system 311, a communication module (or instruction set) 312, a global positioning system (GPS) module (or instruction set) 313, etc.

[0111] The processing circuit 32 and other control circuits can be used to control the operation of the mobile phone. The processing circuit 32 can be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc. The processing circuit 32 can be configured to implement control algorithms for controlling the use of electronic devices in the mobile phone. The processing circuit 32 can also issue control commands for controlling various switches in the electronic devices.

[0112] I / O subsystem 36 couples input / output peripherals on the mobile phone, such as the keypad and other input control devices, to peripheral interface 33. I / O subsystem 36 optionally includes a touchscreen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, light-emitting diodes and other status indicators, data ports, etc. For example, a user can control the operation of the mobile phone by supplying commands via I / O subsystem 36, and can use the output resources of I / O subsystem 36 to receive status information and other outputs from the mobile phone. For example, a user can press button 361 to turn the mobile phone on or off.

[0113] 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.

[0114] 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 the patent 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 protection scope of this patent application should be determined by the appended claims.

Claims

1. A protective plate assembly, characterized in that, The protection board assembly, applied to battery modules, includes: A sampling resistor is used to connect to the cells of the battery assembly; A connector for connecting to the battery cell and the fuel gauge, and for acquiring an enable signal; The first protection module is connected to the sampling resistor and the connector respectively, and is used to connect to the battery cell and to control the on / off state of the first power supply path between the battery cell and the connector based on the first sampling signal collected by the sampling resistor. A switching module, connected to the sampling resistor and the connector respectively, is used to select and activate the sampling path of the fuel meter according to the enable signal; the sampling path is used to transmit the second sampling signal collected by the sampling resistor to the fuel meter via the connector when the circuit is activated.

2. The protection plate assembly according to claim 1, characterized in that, The first power supply path is the path from the first terminal of the battery cell through the first protection module to the connector; a second power supply path is formed between the second terminal of the battery cell and the connector; wherein... The sampling path is disconnected when the first power supply path is disconnected and the second power supply path is connected.

3. The protection plate assembly according to claim 1, characterized in that, The sampling path includes a first sampling path and a second sampling path; the switching module includes: A first switching unit has a first terminal connected to the first terminal of the sampling resistor, a second terminal connected to the first terminal of the connector, and a control terminal connected to the second terminal of the connector. The first terminal of the connector is used to connect to the first terminal of the fuel gauge. The first switching unit is used to select and activate the first sampling path according to the enable signal. The first sampling path is the path from the first terminal of the sampling resistor through the first switching unit and the connector to the first terminal of the fuel gauge. The second terminal of the connector is used to output the enable signal. A second switching unit has a first terminal connected to the second terminal of the sampling resistor, a second terminal connected to the third terminal of the connector, and a control terminal connected to the second terminal of the connector. The third terminal of the connector is used to connect to the second terminal of the fuel gauge. The second switching unit is used to select and activate the second sampling path according to the enable signal. The second sampling path is the path from the second terminal of the sampling resistor through the second switching unit and the connector to the second terminal of the fuel gauge. The sampling path is activated when both the first switching unit and the second switching unit are in the ON state.

4. The protection plate assembly according to claim 3, characterized in that, The first switching unit includes a first switching transistor, the first terminal of the first switching transistor is connected to the first end of the sampling resistor, the second terminal of the first switching transistor is connected to the first end of the connector, and the gate of the first switching transistor is connected to the second end of the connector. The second switching unit includes a second switching transistor, the first terminal of which is connected to the second terminal of the sampling resistor, the second terminal of which is connected to the third terminal of the connector, and the gate of which is connected to the second terminal of the connector; wherein, The enable signal includes a valid enable signal and an invalid enable signal; the first switch and the second switch are respectively turned on in response to the valid enable signal; the first switch and the second switch are respectively turned off in response to the invalid enable signal.

5. The protection plate assembly according to claim 3, characterized in that, The switching module also includes: The first capacitor unit is connected in series between the first terminal of the first switch unit and the second terminal of the first switch unit. The second capacitor unit is connected in series between the first terminal of the second switch unit and the second terminal of the second switch unit.

6. The protection plate assembly according to claim 3, characterized in that, The switching module also includes: A first resistor is connected in series between the second end of the first switching unit and the first end of the connector; The second resistor is connected in series between the second terminal of the second switching unit and the third terminal of the connector.

7. The protective plate assembly according to any one of claims 1-6, characterized in that, The protection plate assembly also includes: The third resistor is connected in series between the first end of the sampling resistor and the control terminal of the switching module.

8. The protective plate assembly according to any one of claims 1-6, characterized in that, The protection board assembly further includes at least one of a fourth resistor and a first diode; wherein... The fourth resistor is connected in series between the control terminal of the switch module and the second terminal of the connector; the second terminal of the connector is used to output the enable signal. The control terminal of the switch module and the second terminal of the connector are respectively grounded through the first diode.

9. The protective plate assembly according to any one of claims 1-6, characterized in that, The protection plate assembly also includes: The second protection module is connected in series in the second power supply path between the second electrode of the battery cell and the connector, and is used to control the on / off state of the second power supply path; the first power supply path is the path from the first electrode of the battery cell through at least the first protection module to the connector; wherein... The sampling resistor is connected in series in the first sub-power supply path between the first pole of the battery cell and the first protection module; or, the sampling resistor is connected in series in the second sub-power supply path between the second pole of the battery cell and the second protection module; or, the sampling resistor is connected in series in the third sub-power supply path between the second protection module and the connector; wherein, the first power supply path includes the first sub-power supply path; the second power supply path includes the second sub-power supply path and the third sub-power supply path.

10. The protective plate assembly according to any one of claims 1-6, characterized in that, When the protection plate assembly is in the locked state, the sampling path is either turned on or off; When the protection plate assembly is in an unfastened state, the sampling path is disconnected.

11. The protective plate assembly according to any one of claims 1-6, characterized in that, The connector includes: The first connector is connected to the switch module for connecting to the battery cell and for acquiring the enable signal; The second connector is connected to the first protection module and the switch module respectively, and is used to connect to the fuel meter; the sampling path includes the path between the sampling resistor, the switch module and the second connector to the fuel meter.

12. The protective plate assembly according to any one of claims 1-6, characterized in that, The protection board assembly further includes a detection module, which is connected to the protection module and the connector respectively, for generating a protection board detection signal in the case of the first power supply path; the protection board detection signal is used to identify the protection board assembly.

13. A battery assembly, characterized in that, Includes battery cells and a protection board assembly as described in any one of claims 1-12.

14. An electronic device, characterized in that, The device includes a motherboard and a battery assembly as described in claim 13, wherein the motherboard includes at least a fuel gauge and a control module, wherein a switch module in the battery assembly is connected to the fuel gauge and the control module via a connector, and the control module is used to provide an enable signal in a powered state.

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