Protection circuit board, charging and discharging system, method and device for determining battery state

Abstract

The present disclosure relates to a protection circuit board, a charging and discharging system, a method and device for determining the state of a battery, wherein the protection circuit board comprises a protection module connected with a battery, a switch module and an identification module, a first end of the identification module is connected with a control module of an electronic device, a second end of the identification module is connected with a negative port and a control port of the protection module through the switch module, wherein the protection module is used for outputting a disconnect signal to the switch module when the battery is in a fault state, and the control module determines a first identification signal corresponding to the disconnect signal through the communication state with the identification module. In the present disclosure, the switch module can output corresponding signals when the battery fails. The control module of the electronic device determines the identification signal based on the communication with the identification module in each protection circuit board, thereby determining the state of each battery.

Description

Technical Field

[0001] This disclosure relates to the field of charging and discharging, and more particularly to a method and apparatus for protecting a circuit board, a charging and discharging system, and determining the state of a battery. Background Technology

[0002] With technological advancements, electronic devices such as mobile phones are charging faster and faster. To meet power consumption demands, the battery capacity of electronic devices is also increasing.

[0003] To increase battery capacity without increasing battery thickness, related technologies typically employ a parallel connection of two identical batteries. However, in electronic devices with dual parallel batteries, if a battery malfunctions, the device may not accurately detect the fault, and continued use will impair its normal operation. Summary of the Invention

[0004] To overcome the problems existing in the related technologies, this disclosure provides a method and apparatus for protecting circuit boards, charging and discharging systems, and determining battery status.

[0005] According to a first aspect of the present disclosure, a protection circuit board is provided for use in a dual-battery parallel charging and discharging system, wherein each battery is connected to a corresponding protection circuit board; wherein the protection circuit board includes:

[0006] A protection module, which is connected to the battery;

[0007] The device includes a switch module and an identification module. The first end of the identification module is connected to the control module of the electronic device, and the second end of the identification module is connected to the negative terminal and the control port of the protection module through the switch module.

[0008] The protection module is used to output a disconnect signal to the switch module when the battery is in a fault state. The control module determines a first identification signal corresponding to the disconnect signal by means of the communication status with the identification module.

[0009] In some embodiments, the switching module includes: a first switching element and a logic AND circuit;

[0010] The first end of the first switching element is connected to the second end of the identification module, the second end of the first switching element is connected to the negative terminal, and the third end of the first switching element is connected to the output terminal of the logic AND circuit.

[0011] The first input terminal of the logic AND circuit is connected to the first control port of the protection module, and the second input terminal of the logic AND circuit is connected to the second control port of the protection module.

[0012] The disconnect signal includes: a low-level signal output from the first control port of the protection module and / or a low-level signal output from the second control port.

[0013] In some embodiments, it further includes: a first branch and a second branch;

[0014] The first end of the first branch is connected to the positive terminal, and the second end is connected to the positive terminal of the battery; the first end of the second branch is connected to the negative terminal of the battery, and the second end is connected to the negative terminal.

[0015] In some embodiments, the first end to the second end of the second branch are provided with a series connection of a sampling resistor, a second switching element and a third switching element;

[0016] The second switching element is connected to the first control port of the protection module, the third switching element is connected to the second control port of the protection module, and the two ends of the sampling resistor are respectively connected to the sampling pins of the protection module.

[0017] In some embodiments, the identification module includes an encryption chip or a thermistor.

[0018] In some embodiments, the identification module includes: a light-emitting device and a photosensitive device connected together;

[0019] The first output terminal of the photosensitive device is connected to the control module, the first input terminal of the light-emitting device is connected to the positive terminal of the battery, and the second input terminal of the light-emitting device is connected to the switch module; under the disconnect signal, the first identification signal is a high-level signal.

[0020] According to a second aspect of the present disclosure, a charging and discharging system is provided, including a first battery, a second battery, and a protection circuit board as described in any one of the preceding embodiments;

[0021] The first battery and the second battery are connected in parallel. Each of the first battery and the second battery corresponds to a protection circuit board, and the first battery and the second battery are respectively connected to the corresponding protection circuit board.

[0022] According to a third aspect of the present disclosure, an electronic device is provided, including the charging and discharging system described above.

[0023] According to a fourth aspect of the present disclosure, a method for determining battery state is provided, applied to the aforementioned electronic device, the method comprising:

[0024] Establish communication with the identification module in the protection circuit board corresponding to each battery;

[0025] Based on the communication status with each battery, determine the identification signal corresponding to each battery;

[0026] In response to at least one identification signal being a first identification signal, it is determined that the battery corresponding to the first identification signal is in a fault state; wherein the first identification signal corresponds to a disconnection signal output by the protection module when the battery is in a fault state.

[0027] In some embodiments, determining the identification signal corresponding to each battery based on the communication status with each battery includes:

[0028] In response to a communication failure with the target battery, the identification signal corresponding to the target battery is determined to be the first identification signal.

[0029] In some embodiments, the method further includes:

[0030] In response to the battery being in a faulty state, a prompt message is output, wherein the prompt message includes: identification information of the target battery in a faulty state.

[0031] According to a fifth aspect of the present disclosure, an apparatus for determining battery state is provided, applied to the aforementioned electronic device, the apparatus comprising:

[0032] The communication module is used to establish communication with the identification module in the protection circuit board corresponding to each battery.

[0033] The first determining module is used to determine the identification signal corresponding to each battery based on the communication status with each battery.

[0034] The second determining module is configured to determine that the battery corresponding to the first identification signal is in a fault state in response to at least one identification signal being a first identification signal; wherein the first identification signal corresponds to a disconnection signal output by the protection module when the battery is in a fault state.

[0035] According to a sixth aspect of the present disclosure, an electronic device is provided, comprising:

[0036] processor;

[0037] Memory used to store the processor's executable instructions;

[0038] The processor is configured to perform the method for determining the battery state as described in any of the preceding items.

[0039] According to a seventh aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, which, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to perform the method for determining battery state as described in any of the preceding claims.

[0040] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: In this disclosure, each battery in a parallel dual-battery system can be connected to a corresponding protection circuit board. The protection circuit board, through a switching module and an identification module, allows the switching module to output a corresponding signal when a battery malfunctions. The control module of the electronic device determines the identification signal based on communication with the identification module in each protection circuit board, thereby determining the state of each battery.

[0041] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0042] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0043] Figure 1 This is a schematic diagram of a charging and discharging system according to an exemplary embodiment.

[0044] Figure 2 This is a schematic diagram of a charging and discharging system according to an exemplary embodiment.

[0045] Figure 3 This is a schematic diagram of a charging and discharging system according to an exemplary embodiment.

[0046] Figure 4 This is a schematic diagram of an optocoupler according to an exemplary embodiment.

[0047] Figure 5 This is a schematic diagram of a battery according to an exemplary embodiment.

[0048] Figure 6 This is a flowchart illustrating a method according to an exemplary embodiment.

[0049] Figure 7 This is a block diagram of an apparatus according to an exemplary embodiment.

[0050] Figure 8 This is a block diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0051] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0052] In related technologies, there is still a lack of methods for identifying the state of dual batteries in parallel dual-battery schemes.

[0053] For example, to save costs, the host may only detect one of the two batteries. In this method, if one battery fails to discharge properly, the host may not be able to detect it and will operate the electronic device with only one battery faulty. This can lead to problems such as halved battery life, inaccurate charging / discharging display, and abnormal shutdown due to high current discharge.

[0054] Even for batteries with two cells connected in parallel, the control is applied to both cells as a whole. Since the two cells share a single protection board, the discharge current is significantly limited, restricting functions requiring high current (such as speakers).

[0055] To address the problems in related technologies, this disclosure proposes a protection circuit board for use in a parallel charging and discharging system of two batteries. Each battery is connected to a corresponding protection circuit board. The protection circuit board includes: a protection module connected to the battery; a switch module and an identification module. A first end of the identification module is connected to the control module of an electronic device, and a second end of the identification module is connected to both the negative terminal and the control port of the protection module via the switch module. The protection module outputs a disconnect signal to the switch module when the battery is in a faulty state. The control module determines a first identification signal corresponding to the disconnect signal based on its communication with the identification module. In this disclosure, each battery in the parallel dual-battery system can be connected to a corresponding protection circuit board. The protection circuit board, through the switch module and identification module, allows the switch module to output a corresponding signal when a battery fault occurs. The control module of the electronic device determines the identification signal based on its communication with the identification module in each protection circuit board, thereby determining the state of each battery.

[0056] In one exemplary embodiment, the protection circuit board of this embodiment is applied to a dual-battery parallel charging and discharging system, with each battery connected to a corresponding protection circuit board. It is understood that the circuit topology of each protection circuit board in this disclosure is identical; therefore, in describing the circuit structure of the protection circuit board, the structure of the protection circuit board corresponding to one battery in a parallel dual-battery system will be used as an example.

[0057] like Figures 1 to 5 As shown, the protection circuit board 1 includes a protection module 11, a switch module 12, and an identification module 13. The protection module 11 is connected to the battery 2. The first end of the identification module 13 is connected to the control module of the electronic device, and the second end of the identification module 13 is connected to the negative terminal (P-) and the control port of the protection module 11 through the switch module 12.

[0058] The protection module 11 is used to output a disconnect signal to the switch module 12 when the battery 2 is in a fault state. The control module determines the first identification signal corresponding to the disconnect signal by the communication status with the identification module 13.

[0059] In this embodiment, the protection module 11 may include a protection IC and its peripheral capacitors and resistors. The protection module 11 can perform corresponding power circuit protection operations when the corresponding battery 2 fails. The power circuit may be the main charging and discharging circuit in the protection circuit board.

[0060] Understandably, the control module of electronic devices cannot directly identify battery fault states through the protection IC. Related technologies integrate a fuel gauge into the protection IC, allowing the control module to identify battery fault states. However, for a dual-battery parallel system, at least two fuel gauges are required. The high cost of fuel gauges hinders their application in low-cost electronic devices, thus limiting the development of dual-battery parallel solutions in related technologies.

[0061] The output port of the protection module 11 is connected to the identification module 13 via the switch module 12. In this embodiment, when the battery 2 is in a fault state, the protection module 11 can output a disconnect signal through its output port to cut off the power circuit and the switch module 12. Under the disconnect signal, the communication state between the identification module 13 and the control module will change. The control module determines the corresponding first identification signal, and can then determine that the battery is in a fault state based on the first identification signal.

[0062] In one exemplary embodiment, such as Figure 1 As shown, the switch module 12 includes: a first switch element 121 and a logic AND circuit 122.

[0063] The first terminal of the first switching element 121 is connected to the second terminal of the identification module 13, the second terminal of the first switching element 121 is connected to the negative port (P-), and the third terminal of the first switching element 121 is connected to the output terminal of the logic AND circuit 122. The first input terminal of the logic AND circuit 122 is connected to the first control port (DOUT) of the protection module 11, and the second input terminal of the logic AND circuit 122 is connected to the second control port (COUT) of the protection module 11. The disconnect signal includes: a low-level signal output from the first control port and / or a low-level signal output from the second control port of the protection module 11.

[0064] In this embodiment, the first switching element (G3) 121 may be, for example, a MOSFET, and the third terminal of the first switching element 121 is its control electrode, or gate. The first switching element 121 can be connected under a high-level signal and disconnected under a low-level signal.

[0065] The logic AND circuit 122, or logic AND gate, includes two input terminals and one output terminal. The first input terminal is connected to the first control port (DOUT) of the protection module 11, the second input terminal is connected to the second control port (COUT), and the output terminal is connected to the gate of the first switching element 121. In the logic AND circuit 122, when both the first and second input terminals have high-level input signals, the output terminal outputs a level signal of 1 (high level); and when either input terminal has a low-level input signal, the output terminal outputs a level signal of 0 (low level).

[0066] In this embodiment, an identification loop can be formed between the identification module 13 and the control module: the first end of the identification module 13 can be connected to the corresponding port of the control module (e.g., ...). Figure 1 In the example, the BVC port is connected, and the second end is connected to the negative port (P-) of the control module through the first switching element 121. When the first switching element 121 is connected, the control module and the identification module 13 are in a successful communication state, and the control module can detect or identify the corresponding parameters of the protection circuit board through the corresponding port and the negative port (P-). When the first switching element 121 is disconnected, the control module and the identification module 13 are in a communication failure state, and the identification signal determined by the control module will change.

[0067] In one example, when battery 2 is working normally, the first control port (DOUT) and the second control port (COUT) of the protection module 11 can output high-level signals normally, and the corresponding logic AND circuit 122 outputs a high-level signal, and the first switching element 121 is turned on under the high-level signal. The control module and the identification module 13 are in a state of successful communication, and the control module can achieve normal identification through the identification module 13.

[0068] In another example, when the protection module 11 detects that the battery 2 is in a fault state, its first control port (DOUT) and second control port (COUT) will output low-level signals, i.e., output disconnect signals. The logic AND circuit 122 will output a low-level signal, and the first switching element 121 will be disconnected under the low-level signal. The identification loop between the identification module 13 and the control module is affected, the communication state changes, and the control module and the identification module 13 are in a communication failure state, so the control module will be unable to achieve normal identification.

[0069] In one exemplary embodiment, such as Figure 1 As shown, the protection circuit board of this embodiment further includes: a first branch 14 and a second branch 15. The first end of the first branch 14 is connected to the positive terminal (P+), and the second end is connected to the positive terminal of the battery 2. The first end of the second branch 15 is connected to the negative terminal of the battery 2, and the second end is connected to the negative terminal (P-).

[0070] In this embodiment, the positive terminal (P+), the first branch 14, the battery 2, the second branch 15, and the negative terminal (P-) form a power circuit or a main charging and discharging circuit to achieve charging and discharging.

[0071] In one exemplary embodiment, such as Figure 1 As shown, the second branch 15 has a series connection between its first and second ends: a sampling resistor 151, a second switching element 152, and a third switching element 153. The second switching element 152 is connected to the first control port (DOUT) of the protection module 11, the third switching element 153 is connected to the second control port (COUT) of the protection module 11, and the two ends of the sampling resistor 151 are respectively connected to the sampling pins of the protection module 11.

[0072] In this embodiment, the second switching element (G2) 152 and the third switching element (G1) 153 can be MOSFETs, and the gates of the two MOSFETs are respectively connected to the control port of the protection module 11.

[0073] In conjunction with the foregoing embodiments, the first control port (DOUT) of the protection module 11 is connected to the first input terminal of the logic AND circuit 122 and the second switching element 152, respectively. The second control port (COUT) is connected to the second input terminal of the logic AND circuit 122 and the third switching element 153, respectively.

[0074] When the protection module 11 detects a fault in battery 2, its first control port (DOUT) and second control port (COUT) will output low-level signals. At this time, the second and third switching elements 152 will disconnect, and the power circuit will be disconnected. Simultaneously, the logic AND circuit 122 will output a low-level signal, and the first switching element 121 will disconnect under the low-level signal. The identification circuit between the identification module 13 and the control module is affected, the communication state changes, and the control module and the identification module 13 are in a communication failure state, so the control module will be unable to achieve normal identification.

[0075] In one exemplary embodiment, such as Figures 1 to 3 As shown, the identification module 13 includes an encryption chip or a thermistor.

[0076] In the first example, such as Figure 1 As shown, the identification module 13 is an encryption chip (encryption IC). The encryption chip (encryption IC) contains encrypted information input by the electronic device manufacturer regarding the battery. By identifying the encryption IC, it is possible to determine whether the battery installed in the electronic device is an officially designated battery from the manufacturer, thereby preventing the use of counterfeit third-party batteries from causing unexpected risks to users.

[0077] Combination Figure 1As shown, an identification loop can be formed between the encryption IC and the control module: the first end of the encryption IC can be connected to the BVC port of the control module, and the second end is connected to the negative port (P-) of the control module through the first switching element 121.

[0078] In this example, when battery 2 is working normally, the first control port (DOUT) and the second control port (COUT) of the protection module 11 can output high-level signals normally. At this time, the second switch element 152 and the third switch element 152 are both connected, and the power circuit is connected. At the same time, the logic AND circuit 122 outputs a high-level signal, and the first switch element 121 is turned on under the high-level signal.

[0079] At this point, the identification circuit is activated, and the communication status between the control module and the encryption IC is successful. The identification process of the control module is as follows: the communication signal of the control module starts from the BVC port, passes through the IO port of the encryption IC, then through the GND port of the encryption IC, and finally passes through the first switching element 121 to the negative port (P-), before returning to the control module. The control module can then obtain relevant information about battery 2, such as whether it is an official battery.

[0080] When battery 2 is in a fault state, the first control port (DOUT) and the second control port (COUT) of the protection module 11 will output a low-level signal, at which time the second switch element 152 and the third switch element 152 will be disconnected, and the power circuit will be disconnected. At the same time, the logic AND circuit 122 will output a low-level signal, and the first switch element 121 will be disconnected under the low-level signal.

[0081] At this point, the identification circuit is disconnected, and the communication between the control module and the encryption IC fails. The control module will be unable to identify relevant information about battery 2 based on the encryption IC. The control module can then determine the first identification signal indicating identification failure. Based on this first identification signal, the control module can determine that battery 2 has malfunctioned and cannot charge or discharge normally, and can issue a notification to the user.

[0082] In the second example, such as Figure 2 As shown, the identification module 13 is a thermistor (NTC). NTC is a negative temperature coefficient thermistor, which can detect the temperature of battery 2 during battery charging and discharging.

[0083] Combination Figure 2 As shown, a temperature recognition loop (or temperature detection loop) can be formed between the NTC and the control module: the first end of the NTC can be connected to the TH port of the control module, and the second end is connected to the negative port (P-) of the control module through the first switching element 121.

[0084] In this example, when battery 2 is working normally, the first control port (DOUT) and the second control port (COUT) of the protection module 11 can output high-level signals normally. At this time, the second switch element 152 and the third switch element 152 are both connected, and the power circuit is connected. At the same time, the logic AND circuit 122 outputs a high-level signal, and the first switch element 121 is turned on under the high-level signal.

[0085] At this time, the temperature detection circuit is activated, and the communication status between the control module and the NTC is successful. The process by which the control module obtains the temperature is as follows: the communication signal of the control module starts from the TH port, passes through the NTC, then through the first switching element 121 to the negative terminal port (P-), and then returns to the control module. The control module can then obtain the temperature of battery 2.

[0086] When battery 2 is in a fault state, the first control port (DOUT) and the second control port (COUT) of the protection module 11 will output a low-level signal, at which time the second switch element 152 and the third switch element 152 will be disconnected, and the power circuit will be disconnected. At the same time, the logic AND circuit 122 will output a low-level signal, and the first switch element 121 will be disconnected under the low-level signal.

[0087] At this point, the temperature detection circuit is disconnected, and the communication between the control module and the NTC fails. The control module will be unable to obtain the temperature of battery 2 from the NTC. The control module can then identify the first identification signal indicating a temperature detection failure. Based on this first identification signal, the control module can determine that battery 2 has malfunctioned and cannot charge or discharge normally, and can issue a notification to the user.

[0088] In one exemplary embodiment, the identification module can also be an optocoupler. For example... Figures 3 to 4 As shown, in this embodiment, the optocoupler includes a light-emitting device 131 and a photosensitive device 132 connected to each other. The first output terminal of the photosensitive device 132 is connected to the control module, the first input terminal of the light-emitting device 131 is connected to the positive terminal of the battery 2, and the second input terminal of the light-emitting device 131 is connected to the switch module 12; under the disconnect signal, the first identification signal is a high-level signal.

[0089] like Figure 4 As shown, in this embodiment, the light-emitting device 131 can convert an electrical signal into an optical signal, such as a light-emitting diode. The photosensitive device 132 can convert an optical signal into an electrical signal, such as a phototransistor. Thus, the optocoupler can realize electro-optical and optical-electrical conversion. The optocoupler can be soldered onto the motherboard of the electronic device, and one encapsulated optocoupler can be provided on the protection circuit board corresponding to each battery.

[0090] Combination Figure 3As shown, an identification loop can be formed between the optocoupler and the control module: the first output terminal (C port or...) of the photosensitive device 132 Figure 4 The middle port 4) is connected to the I / O port (C port) of the control module, and the second output terminal (E port or Figure 4 Port 3) is connected to the E port of the control module. In this embodiment, the first output terminal (port 4) of the photosensitive device 132 can also be connected to a pull-up resistor; the E port of the control module can represent a ground port, that is, the second output terminal (port 3) of the photosensitive device 132 is grounded. The first input terminal (VDD or...) of the light-emitting device 131 Figure 4 The middle port 1) is connected to the battery 2, and the second input terminal (VSS or) of the light-emitting device 131 Figure 4 The middle port 2) is connected to the negative port (P-) of the control module through the first switching element 121.

[0091] In one example, when battery 2 is working normally, the first control port (DOUT) and the second control port (COUT) of the protection module 11 can output high-level signals normally. At this time, the second switching element 152 and the third switching element 152 are both connected, and the power circuit is connected. At the same time, the logic AND circuit 122 outputs a high-level signal, and the first switching element 121 is turned on under the high-level signal.

[0092] Combination Figure 4 As shown, in this example, the communication status between the control module and the optocoupler is successful. The two input ports of the light-emitting device 131 are connected to the first switching element 121, causing the light-emitting device 131 to emit light and the photosensitive device 132 to conduct. The two output ports of the photosensitive device 132 are connected (grounded), allowing the I / O port of the control module to receive a low-level signal.

[0093] In another example, when battery 2 is in a fault state, the first control port (DOUT) and the second control port (COUT) of the protection module 11 output a low-level signal, at which time the second switch element 152 and the third switch element 152 are disconnected, and the power circuit is disconnected. At the same time, the logic AND circuit 122 will output a low-level signal, and the first switch element 121 will be disconnected under the low-level signal.

[0094] Combination Figure 4 As shown, in this example, the communication status between the control module and the optocoupler is in a failed state. The two input ports of the light-emitting device 131 cannot connect to the first switching element 121, the light-emitting device 131 does not emit light, and the photosensitive device 132 is disconnected. The two output ports of the photosensitive device 132 are disconnected, thus the I / O port of the control module can obtain a high-level signal (pull-up resistor) from the first output terminal. That is, the control module obtains the first identification signal, determines that battery 2 has malfunctioned, and can issue a prompt to the user.

[0095] In one exemplary embodiment, this disclosure also proposes a charging and discharging system, including a first battery, a second battery, and the protection circuit board described in the above embodiments.

[0096] Combination Figure 5 As shown, the first battery 21 and the second battery 22 are connected in parallel, and each battery 21 and the second battery 22 corresponds to a protection circuit board 1. The first battery 21 and the second battery 22 are respectively connected to their respective protection circuit boards 1. The main board has two sets of positive and negative terminals corresponding to the two batteries. The first battery 21 is fastened to the main board of the electronic device (connected to the corresponding positive and negative terminals) through the corresponding connector A, and the second battery 22 is fastened to the main board through the corresponding connector B, thus achieving a parallel connection between the first battery 21 and the second battery 22.

[0097] In one exemplary embodiment, this disclosure also proposes an electronic device, such as a mobile phone, tablet computer, laptop computer, or other terminal device. In this embodiment, the electronic device may refer to a tablet computer.

[0098] like Figures 1 to 5 As shown, the electronic device may include a control module and the charging / discharging system described in the above embodiments. The control module includes multiple connection ports such as a positive port (P+) and a negative port (P-). The control module may, for example, include the host system, motherboard, or CPU of the electronic device.

[0099] In the embodiments of this disclosure, combined with Figures 1 to 4 Electronic devices can effectively identify the status of each battery by utilizing encryption ICs, NTCs, and optocouplers. This eliminates the need for a fuel gauge for each battery, effectively controlling costs; it also fully leverages the charging and discharging performance of parallel dual batteries, without limiting high-current functions (such as speakers), and meets the discharge requirements of high-power loads.

[0100] In one exemplary embodiment, this disclosure also proposes a method for identifying battery status, applied to the electronic device described above. For example... Figure 6 As shown, the method in this embodiment may include the following steps:

[0101] S110 establishes communication with the identification module in the protection circuit board corresponding to each battery.

[0102] S120. Determine the identification signal corresponding to each battery based on the communication status with each battery.

[0103] S130. In response to at least one identification signal being a first identification signal, determine that the battery corresponding to the first identification signal is in a fault state.

[0104] In step S110, combined Figures 1 to 5 The control module (such as the CPU) of the electronic device is connected to the identification module 13, and the identification module 13 is connected to the protection module 11 through the switch module 12. The protection module 11 outputs different signals (such as disconnection signals and connection signals) to the switch module 12 according to the battery status. The communication status between the identification module 13 and the control module will vary depending on whether the switch module 12 is connected or disconnected.

[0105] In step S120, the communication state includes, for example, a success state and a failure state. In the success state, the control module determines a second identification signal, which indicates successful communication and may contain battery information. In the failure state, the control module determines a first identification signal, which indicates communication failure.

[0106] Therefore, this step may include: in response to a communication failure with the target battery, determining the identification signal corresponding to the target battery as the first identification signal. In this step, the target battery refers to the battery in the parallel battery network that is in a failure state.

[0107] In step S130, the first identification signal indicates that the communication between the control module and the identification module 13 has failed. Simultaneously, the first identification signal corresponds to the disconnect signal output by the protection module 11 when the battery is in a fault state. Therefore, when the identification signal is the first identification signal, it indicates that a disconnect signal exists. The disconnect signal is only output when the battery 2 is in a fault state; therefore, when the identification signal is the first identification signal, it indicates that the battery is in a fault state.

[0108] Furthermore, if the identification signal is the second identification signal, it indicates that the battery corresponding to the second identification signal is in a normal state.

[0109] Combination Figures 1 to 4 For example, the identification module 13 may include: an encryption IC, an NTC, or an optocoupler. Implementation methods for each example can be found in the foregoing embodiments, and will not be repeated here. Figure 1 and Figure 2 In the corresponding example, the first identification signal is determined by the control module based on communication failure. Figures 3 to 4 In the corresponding example, the first identification signal is a high-level signal obtained from the identification module 13 when the control module fails to communicate with the optocoupler.

[0110] In this embodiment, the control module can identify two parallel batteries in a preset order and time interval. For example, the control module first communicates with the protection circuit board corresponding to the first battery 21, and then communicates with the identification module 13 corresponding to the first battery 21 to determine the state of the first battery 21. Then it communicates with the protection circuit board corresponding to the second battery 21, and then communicates with the identification module 13 corresponding to the second battery 22 to determine the state of the second battery 22. After each determination process (first battery 21 and second battery 22), a preset time interval is elapsed before the next determination process begins. Thus, the electronic device can promptly obtain the state of any single battery, promptly reminding the user, maintaining the normal operation of the electronic device, and improving safety during use.

[0111] In one exemplary embodiment, the steps of this embodiment further include the following steps:

[0112] S140, In response to the target battery being in a fault state, output a prompt message.

[0113] In this step, the prompt information includes the identification information of the target battery in a faulty state. In devices with dual batteries connected in parallel, each battery can be assigned a corresponding identification during the factory manufacturing process. In this embodiment, after identifying the faulty battery, a prompt information can be displayed via voice or text, including the identification of the faulty battery. This helps users intuitively identify the faulty battery and improves safety during use.

[0114] In one exemplary embodiment, this disclosure also provides a device for determining battery status, applied to the electronic device described above. For example... Figure 7 As shown, the apparatus of this embodiment includes: a communication module 110, a first determining module 120, and a second determining module 130. The apparatus of this embodiment is used to implement... Figure 6 The method is illustrated. The communication module 110 establishes communication with the identification module in the protection circuit board corresponding to each battery. The first determining module 120 determines an identification signal corresponding to each battery based on the communication status with each battery. The second determining module 130 determines that the battery corresponding to the first identification signal is in a fault state in response to at least one identification signal being a first identification signal; wherein the first identification signal corresponds to a disconnection signal output by the protection module when the battery is in a fault state.

[0115] like Figure 8 The diagram shown is a block diagram of an electronic device. This disclosure also provides an electronic device, for example, device 500 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, etc.

[0116] Device 500 may include one or more of the following components: processing component 502, memory 504, power component 506, multimedia component 508, audio component 510, input / output (I / O) interface 512, sensor component 514, and communication component 516.

[0117] Processing component 502 typically controls the overall operation of device 500, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 502 may include one or more processors 520 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.

[0118] Memory 504 is configured to store various types of data to support the operation of device 500. Examples of this data include instructions for any application or method operating on device 500, contact data, phonebook data, messages, pictures, videos, etc. Memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0119] The power supply component 506 provides power to the various components of the device 500. The power supply component 506 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 500.

[0120] Multimedia component 508 includes a screen that provides an output interface between device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 508 includes a front-facing camera and / or a rear-facing camera. When device 500 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0121] Audio component 510 is configured to output and / or input audio signals. For example, audio component 510 includes a microphone (MIC) configured to receive external audio signals when device 500 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 504 or transmitted via communication component 516. In some embodiments, audio component 510 also includes a speaker for outputting audio signals.

[0122] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0123] Sensor assembly 514 includes one or more sensors for providing state assessments of various aspects of device 500. For example, sensor assembly 514 may detect the on / off state of device 500, the relative positioning of components such as the display and keypad of device 500, changes in the position of device 500 or a component of device 500, the presence or absence of user contact with device 500, the orientation or acceleration / deceleration of device 500, and temperature changes of device 500. Sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 514 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0124] Communication component 516 is configured to facilitate wired or wireless communication between device 500 and other devices. Device 500 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 516 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0125] In an exemplary embodiment, device 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0126] Another exemplary embodiment of this disclosure provides a non-transitory computer-readable storage medium, such as a memory 504 including instructions that can be executed by a processor 520 of a device 500 to perform the described method. For example, the computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, or optical data storage device. When the instructions in the storage medium are executed by the processor of an electronic device, the electronic device is able to perform the described method.

[0127] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0128] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A protective circuit board, characterized in that, In a parallel charging and discharging system for two batteries, each battery is connected to a corresponding protection circuit board; wherein, the protection circuit board includes: A protection module, which is connected to the battery; The device includes a switch module and an identification module. The first end of the identification module is connected to the control module of the electronic device, and the second end of the identification module is connected to the negative terminal and the control port of the protection module through the switch module. The protection module is used to output a disconnect signal to the switch module when the battery is in a fault state, and the control module determines a first identification signal corresponding to the disconnect signal by means of the communication status with the identification module. The switching module includes: a first switching element and a logic AND circuit; The first end of the first switching element is connected to the second end of the identification module, the second end of the first switching element is connected to the negative terminal, and the third end of the first switching element is connected to the output terminal of the logic AND circuit. The first input terminal of the logic AND circuit is connected to the first control port of the protection module, and the second input terminal of the logic AND circuit is connected to the second control port of the protection module. The disconnect signal includes: a low-level signal output from the first control port of the protection module and / or a low-level signal output from the second control port.

2. The protective circuit board according to claim 1, characterized in that, Also includes: First Branch Road and Second Branch Road; The first end of the first branch is connected to the positive terminal, and the second end is connected to the positive terminal of the battery; the first end of the second branch is connected to the negative terminal of the battery, and the second end is connected to the negative terminal.

3. The protective circuit board according to claim 2, characterized in that, The second branch has a series connection between its first and second ends: a sampling resistor, a second switching element, and a third switching element; The second switching element is connected to the first control port of the protection module, the third switching element is connected to the second control port of the protection module, and the two ends of the sampling resistor are respectively connected to the sampling pins of the protection module.

4. The protective circuit board according to any one of claims 1 to 3, characterized in that, The identification module includes an encryption chip or a thermistor.

5. The protective circuit board according to any one of claims 1 to 3, characterized in that, The identification module includes: a light-emitting device and a photosensitive device connected together; The first output terminal of the photosensitive device is connected to the control module, the first input terminal of the light-emitting device is connected to the positive terminal of the battery, and the second input terminal of the light-emitting device is connected to the switch module; under the disconnect signal, the first identification signal is a high-level signal.

6. A charging and discharging system, characterized in that, It includes a first battery, a second battery, and a protective circuit board as described in any one of claims 1 to 5; The first battery and the second battery are connected in parallel. Each of the first battery and the second battery corresponds to a protection circuit board, and the first battery and the second battery are respectively connected to the corresponding protection circuit board.

7. An electronic device, characterized in that, Includes the charging and discharging system as described in claim 6.

8. A method for determining the state of a battery, characterized in that, Applied to the electronic device of claim 7, the method includes: Establish communication with the identification module in the protection circuit board corresponding to each battery; Based on the communication status with each battery, determine the identification signal corresponding to each battery; In response to at least one identification signal being a first identification signal, it is determined that the battery corresponding to the first identification signal is in a fault state; wherein the first identification signal corresponds to a disconnection signal output by the protection module when the battery is in a fault state.

9. The method according to claim 8, characterized in that, The step of determining the identification signal corresponding to each battery based on the communication status with each battery includes: In response to a communication failure with the target battery, the identification signal corresponding to the target battery is determined to be the first identification signal.

10. The method according to claim 8, characterized in that, The method further includes: In response to the battery being in a faulty state, a prompt message is output, wherein the prompt message includes: identification information of the target battery in a faulty state.

11. A device for determining the state of a battery, characterized in that, Applied to the electronic device of claim 7, the device comprises: The communication module is used to establish communication with the identification module in the protection circuit board corresponding to each battery. The first determining module is used to determine the identification signal corresponding to each battery based on the communication status with each battery. The second determining module is configured to determine that the battery corresponding to the first identification signal is in a fault state in response to at least one identification signal being a first identification signal; wherein the first identification signal corresponds to a disconnection signal output by the protection module when the battery is in a fault state.

12. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to perform the method for determining the battery state as described in any one of claims 8 to 10.

13. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device is able to perform the method for determining the battery state as described in any one of claims 8 to 10.

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