CN118191630A

CN118191630A - Electric quantity acquisition circuit and electronic equipment

Info

Publication number: CN118191630A
Application number: CN202211596381.5A
Authority: CN
Inventors: 田晨; 陈社彪; 曾得志
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2024-06-14

Abstract

The invention discloses an electric quantity acquisition circuit and electronic equipment, wherein the electric quantity acquisition circuit is provided with an electric quantity acquisition unit and a level conversion unit, the electric quantity acquisition unit is respectively connected with an electric storage unit and the level conversion unit, the level conversion unit is used for filtering common-mode voltage in current and voltage signals of the electric storage units acquired by the electric quantity acquisition unit, and the electric quantity acquisition unit still can normally communicate with a communication unit after acquiring information such as voltage and/or current of each electric storage unit when a plurality of electric storage units are connected in series, so that the communication unit can acquire information such as voltage and/or current of each electric storage unit, and each electric storage unit in series is convenient to monitor in real time.

Description

Electric quantity acquisition circuit and electronic equipment

Technical Field

The embodiment of the application relates to the technical field of battery management, in particular to an electric quantity acquisition circuit and electronic equipment.

Background

Conventionally, an electricity meter is generally used to collect information such as voltage and current of an electricity storage unit, for example, a battery, and when detecting a charging system in which a plurality of batteries are connected in series, the electricity meter generally needs to connect a precise small-resistance detection current in series to a negative electrode or a positive electrode of each battery, and only measures the total current flowing through each battery. When a plurality of batteries with different capacities are connected in series, in order to ensure that the batteries with different capacities are simultaneously filled and emptied, a battery equalization circuit is added to carry electric quantity, so that the voltages of the batteries with different capacities in the charging and discharging process are ensured to be kept the same, but the current flowing through the batteries is different, and therefore the current of each battery needs to be sampled and detected respectively, namely, each battery adopts an independent electricity meter.

In order to monitor the charge condition of each battery, the measurement result of each fuel gauge needs to be sent to a communication unit, for example, a communication unit that performs data interaction with the master host. However, when a plurality of batteries are connected in series, only one fuel gauge can directly communicate with the communication unit, while the other fuel gauges cannot directly communicate with the communication unit due to the high common mode voltage.

Disclosure of Invention

In view of this, the electric quantity acquisition circuit and the electronic device provided by the embodiments of the present application can realize that the communication circuit of each battery in the charging system with multiple batteries connected in series can normally communicate with the communication unit, so that the communication unit obtains information such as voltage and current of each battery, and is convenient for monitoring the charging and discharging of the multiple batteries connected in series in real time.

In a first aspect, an electric quantity acquisition circuit provided by an embodiment of the present application is applied to an electronic device, where the electronic device includes at least two electric storage units connected in series with each other, and the circuit includes: the electric quantity acquisition unit is connected with the at least two electric storage units and used for acquiring the charging current and/or the charging voltage of each electric storage unit in the at least two electric storage units and generating at least two first signals, and each first signal is used for indicating the charging current and/or the charging voltage of the corresponding electric storage unit; the level conversion unit is connected with the electric quantity acquisition unit and is used for receiving part or all of the first signals, filtering the common mode voltage of each first signal in the part or all of the first signals and outputting at least two second signals, wherein the at least two second signals correspond to the at least two first signals one by one; and the communication unit is used for receiving the at least two second signals.

In one embodiment, the number of the electric quantity collection units is at least two, and the at least two electric quantity collection units are connected with the at least two electric storage units in a one-to-one correspondence manner so as to generate the at least two first signals.

In one embodiment, the number of the level conversion units is at least one, where, in a case that the number of the electric quantity collection units is at least two and the number of the level conversion units is one, the level conversion units include at least two conversion interfaces, and the at least two conversion interfaces are connected with the at least two electric quantity collection units in a one-to-one correspondence manner; and under the condition that the number of the electric quantity acquisition units is at least two and the number of the level conversion units is at least two, the at least two level conversion units are connected with the at least two electric quantity acquisition units in a one-to-one correspondence manner.

In one embodiment, the at least two electric storage units comprise a first electric storage unit and at least one second electric storage unit, the negative electrode of the first electric storage unit is connected with the ground, and the positive electrode of the first electric storage unit is connected with the at least one second electric storage unit; the electric quantity acquisition unit specifically comprises a first electric quantity acquisition unit and at least one second electric quantity acquisition unit, wherein: the first electric quantity acquisition unit is used for acquiring charging current and/or charging voltage of the first electric storage unit and outputting a first signal corresponding to the first electric storage unit, and the first signal corresponding to the first electric storage unit is used for communicating with the communication unit; the at least one second electric quantity acquisition unit is used for acquiring the charging current and/or the charging voltage of each second electric storage unit and outputting at least one first signal corresponding to the at least one second electric storage unit; the level conversion unit is connected with the at least one second electric quantity acquisition unit, and is specifically configured to receive the at least one first signal corresponding to the at least one second electric storage unit, filter the common mode voltage of the at least one first signal corresponding to the at least one second electric storage unit, and output at least one second signal.

In one embodiment, the circuit further includes a first control unit, where the first control unit is connected to the level conversion unit, and the first control unit is configured to receive the at least two second signals output by the level conversion unit, and output the at least two second signals to the communication unit according to a preset signal transmission rule.

In one embodiment, the circuit further includes a second control unit, where the second control unit is connected to the first electric quantity collection unit and the level conversion unit, and the second control unit is configured to receive the first signal output by the first electric quantity collection unit and the at least two second signals output by the level conversion unit, and output the first signal and the at least two second signals to the communication unit according to a preset signal transmission rule.

In one embodiment, the level conversion unit includes a data synchronization processing module and a clock synchronization processing module, the data synchronization processing module is respectively connected with the cathodes of the at least two electric storage units and the electric quantity acquisition unit, and the clock synchronization processing module is respectively connected with the cathodes of the at least two electric storage units, the data synchronization processing module and the electric quantity acquisition unit; the data synchronization processing module is used for generating a corresponding second signal according to the magnitude relation between the signal amplitude variation of any two adjacent moments of each first signal and the variation threshold; the clock synchronization processing module is used for keeping the sampling frequency of the electric quantity acquisition unit consistent with the frequency of the clock signal of the communication unit, and the reciprocal of the sampling frequency is the same as the difference value between any two adjacent moments of each first signal.

In one embodiment, the data synchronization processing module includes a first trigger and a second trigger; the input end of the first trigger is connected with the communication unit, and the output end of the first trigger is connected with the electric quantity acquisition unit and is used for sending a data request signal sent by the communication unit to the electric quantity acquisition unit; the input end of the second trigger is connected with the electric quantity acquisition unit, and the output end of the second trigger is connected with the communication unit and is used for converting the at least two first signals sent by the electric quantity acquisition unit into the at least two second signals.

In one embodiment, the clock synchronization processing module includes a third trigger, an input end of the third trigger is connected with the communication unit, and an output end of the third trigger is connected with the electric quantity acquisition unit, and is used for sending a clock signal sent by the communication unit to the electric quantity acquisition unit.

In one embodiment, the level conversion unit further includes a controller, a first switch and a second switch, the negative electrode of the electric storage unit is connected with the clock synchronization processing module through the first switch, the negative electrode of the electric storage unit is connected with the data synchronization processing module through the second switch, and the controller is respectively connected with the communication unit, the data synchronization processing module, the first switch and the second switch; the controller is used for receiving a starting instruction sent by the communication unit, generating and sending a first conduction instruction to the first switch and a second conduction instruction to the second switch based on the starting instruction; the first switch is used for receiving the first conduction instruction and controlling the negative electrode of the electric storage unit to be in a connection state with the clock synchronization processing module; the second switch is used for receiving the second conduction instruction and controlling the negative electrode of the electric storage unit to be in a connection state with the data synchronization processing module; the controller is further configured to send the at least two second signals output by the data synchronization processing module to the communication unit.

In one embodiment, the electric quantity collection unit includes a first sampling resistor and a first sampling circuit, the first sampling circuit includes a first voltage sampling end, a first current sampling end and a second current sampling end, one end of the first sampling resistor is connected with the negative electrode of the electric storage unit and the first current sampling end respectively, the second current sampling end is connected with the other end of the first sampling resistor, and the first voltage sampling end is connected with the positive electrode of the electric storage unit; or, the electric quantity acquisition unit comprises a second sampling resistor and a second sampling circuit, the second sampling circuit comprises a second voltage sampling end and a third current sampling end, one end of the second sampling resistor is connected with the third current sampling end, and the other end of the second sampling resistor is respectively connected with the second voltage sampling end and the positive electrode of the electric storage unit.

In a second aspect, an electronic device provided by an embodiment of the present application includes the above electric quantity acquisition circuit.

According to the electric quantity acquisition circuit and the electronic equipment, the electric quantity acquisition unit and the level conversion unit are arranged, the electric quantity acquisition unit is respectively connected with the electric storage unit and the level conversion unit, the level conversion unit is used for filtering common mode voltage in current and voltage signals of the electric storage units acquired by the electric quantity acquisition unit, normal communication can be carried out between the electric quantity acquisition unit and the communication unit after the electric quantity acquisition unit acquires information such as voltage and current of each electric storage unit when the electric storage units are connected in series, and therefore the communication unit can acquire information such as voltage and current of each electric storage unit, and real-time monitoring of each electric storage unit in the series of multiple electric storage units is facilitated.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic diagram of a prior art power harvesting circuit;

Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

Fig. 8 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

Fig. 10 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application;

Fig. 11 is a schematic structural diagram of a level shifter unit according to an embodiment of the present application;

Fig. 12 is a schematic structural diagram of a level shifter unit according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a level shifter unit according to an embodiment of the present application;

Fig. 14 is a schematic structural diagram of an electric quantity acquisition unit according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of an electric quantity collection unit according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are illustrative of the application and are not intended to limit the scope of the application.

Unless defined otherwise, 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 embodiments of the application only and is not intended to be limiting of the application.

In the existing charge-discharge unit architecture in which a plurality of electric storage units are connected in series, the electric capacity of each electric storage unit is unequal, so in order to monitor the information such as the voltage and the current of each electric storage unit in real time, an electric meter needs to be connected in parallel to each electric storage unit, and the information such as the voltage of each electric storage unit, the current flowing through the electric storage unit, the temperature of the electric storage unit and the like is collected through the electric meter so as to calculate the electric capacity state of each electric storage unit, and the electric capacity state is transmitted to a communication unit so as to monitor the electric capacity state of each electric storage unit.

Fig. 1 is a schematic diagram of a prior art electric power harvesting circuit, as shown in fig. 1, where the electric power harvesting circuit includes at least two electric storage units and at least two electric meters, the at least two electric storage units are connected in series, a first electric storage unit BAT1 with a negative electrode connected to a ground terminal and other electric storage units BAT1, BAT2, …, BATn with a negative electrode connected to a positive electrode of the first electric storage unit are formed, when the electric meters harvest current and/or voltage of the at least two electric storage units, the positive electrode and the negative electrode of each electric storage unit are respectively connected by the electric meters, so as to detect current and/or voltage of each electric storage unit, and when the electric meters are connected to each electric storage unit, different common-mode voltages are generated by the negative electrode of each electric storage unit, the common-mode voltages of each electric storage unit are determined according to voltages of all connected electric storage units between the electric storage units and the ground terminal, for example, when the electric meters harvest voltage and/or current signals of the nth electric storage unit BATn, the common-mode voltages of the nth electric storage unit BATn are generated, the common-mode voltages Vcn of the nth electric storage unit BATn are Vbat +vb1+2- …, and the voltage of Vbat the nth electric storage unit is Vbat +1+322-322, and the voltage of the Vbat-621- +322. After the signal of the current and/or the voltage of the corresponding electric storage unit is collected, each electric meter is transmitted to the communication unit and is sent to the electronic device or the upper computer through the communication unit so as to monitor the current information and/or the voltage information of each electric storage unit, but the signal transmitted to the communication unit is overlapped with the common mode voltage of the corresponding electric storage unit so as to form a communication voltage higher than the standard voltage of the communication unit, for example, the differential mode high voltage at the electric storage unit BATn is vcn+vhn, the low voltage is vcn+vln, and the standard high voltage Vhn and the low voltage Vln higher than the communication unit are not communicated through the communication unit.

In view of the above, embodiments of the present application provide a power harvesting circuit and an electronic device, which may be a terminal or a communication terminal including, but not limited to, a device arranged to receive/transmit communication signals via a wireline connection, such as via a public-switched telephone network (public switched telephone network, PSTN), a digital subscriber line (digital subscriber line, DSL), a digital cable, a direct cable connection, and/or another data connection/network and/or via a wireless interface, for example, for a cellular network, a wireless local area network (wireless local area network, WLAN), a digital television network such as a digital video broadcasting handheld (digital video broadcasting handheld, DVB-H) network, a satellite network, an amplitude-modulation (amplitude modulation-frequency modulation, AM-FM) broadcast transmitter, and/or another communication terminal. A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," wireless terminal, "and/or" mobile terminal. Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (personal communication system, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; personal digital assistant (Personal DIGITAL ASSISTANT, PDA) that may include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (global positioning system, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. In addition, the terminal can further comprise, but is not limited to, chargeable electronic devices with charging functions, such as electronic book readers, intelligent wearable devices, mobile power sources (such as charger, travel charger), electronic cigarettes, wireless mice, wireless keyboards, wireless headphones, bluetooth sound boxes and the like.

Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 2, the electronic device 10 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charge management module 140, a power management module 141, an electric storage unit 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, a display 170, and keys 180.

It should be understood that the illustrated construction of the embodiments of the present application does not constitute a particular limitation of the electronic device 10. In other embodiments of the application, the electronic device 10 may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, such as: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (IMAGE SIGNAL processor, ISP), a controller, a video codec, a digital signal processor (DIGITAL SIGNAL processor, DSP), a baseband processor, and/or a neural-Network Processor (NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors. By way of example, the processor 110 may be a smart terminal CPU, such as a Snapdragon family processor, or the like. In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an integrated circuit (inter-INTEGRATED CIRCUIT, I2C) interface, an integrated circuit built-in audio (inter-INTEGRATED CIRCUIT SOUND, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, and/or a universal serial bus (universal serial bus, USB) interface, among others.

It should be understood that the interfacing relationship between the modules illustrated in the embodiments of the present application is only illustrative and not limiting to the structure of the electronic device 10. In other embodiments of the present application, the electronic device 10 may also employ different interfaces in the above embodiments, or a combination of interfaces.

The charge management module 140 is configured to receive a charge input from a charger. The charger can be a wireless charger or a wired charger. The power management module 141 is used for connecting the power storage unit 142, and the charging management module 140 and the processor 110. The power management module 141 receives input from the power storage unit 142, e.g., battery, cell, etc., and/or the charge management module 140, and provides power to the processor 110, the internal memory 121, the display 170, the wireless communication module 160, etc.

The wireless communication function of the electronic device 10 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like. The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the electronic device 10 may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution for wireless communication including 2G/3G/4G/5G, etc. applied to the electronic device 10. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module 150 may receive electromagnetic waves from the antenna 1, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation.

The wireless communication module 160 may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (WIRELESS FIDELITY, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation SATELLITE SYSTEM, GNSS), frequency modulation (frequency modulation, FM), near field communication (NEAR FIELD communication, NFC), infrared (IR), etc., as applied to the electronic device 10. The wireless communication module 160 may be one or more devices that integrate at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, frequency modulate it, amplify it, and convert it to electromagnetic waves for radiation via the antenna 2.

In some embodiments, antenna 1 and mobile communication module 150 of electronic device 10 are coupled, and antenna 2 and wireless communication module 160 are coupled, such that electronic device 10 may communicate with a network and other devices via wireless communication techniques.

The electronic device 10 implements display functions via a GPU, a display 170, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display 170 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or change display information. The display 170 is used to display images, videos, and the like.

The electronic device 10 may implement shooting functions through an ISP, a camera, a video codec, a GPU, a display screen 170, an application processor, and the like. The ISP is used for processing the data fed back by the camera. Cameras are used to capture still images or video. The object generates an optical image through the lens and projects the optical image onto the photosensitive element. The photosensitive element may be a charge coupled device (charge coupled device, CCD) or a Complementary Metal Oxide Semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, which is then transferred to the ISP to be converted into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in a standard RGB, YUV, or the like format. The digital signal processor is used for processing digital signals, and can process other digital signals besides digital image signals.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to enable expansion of the memory capabilities of the electronic device 10. The external memory card communicates with the processor 110 through an external memory interface 120 to implement data storage functions. For example, files such as music, video, etc. are stored in an external memory card.

The internal memory 121 may be used to store computer executable program code including instructions. The internal memory 121 may include a storage program area and a storage data area. The storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the electronic device 10 (e.g., audio data, phonebook, etc.), and so forth.

The keys 180 include a power on key, a volume key, etc. The keys 180 may be mechanical keys. Or may be a touch key. The electronic device 10 may receive key inputs, generating key signal inputs related to user settings and function controls of the electronic device 10.

In addition, the electronic device according to the embodiment of the present application may further be provided with an operating system, on which an application program may be installed and run.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Fig. 3 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application. As shown in fig. 3, the power acquisition circuit 20 may include a power acquisition unit 210, a level conversion unit 220, and a communication unit 230, as applied to the electronic device 10 shown in fig. 1.

The electric quantity acquisition unit 210 is connected with the at least two electric storage units 142 and is used for acquiring the current and/or the voltage of each electric storage unit 142 in the at least two electric storage units 142 and generating at least two first signals, wherein each first signal is used for indicating the current and/or the voltage of the corresponding electric storage unit 142;

the level conversion unit 220 is connected to the electric quantity collection unit 210, and is configured to receive some or all of the at least two first signals, filter a common-mode voltage of each of the some or all first signals, and output at least two second signals, where the at least two second signals are in one-to-one correspondence with the at least two first signals;

a communication unit 230, configured to receive the at least two second signals.

Optionally, the communication unit 230 may be configured to implement data interaction between the power collecting circuit and the electronic device, for example, when the at least two electric storage units are in a charging state, the communication unit 230 may transmit the at least two second signals to the charging management module 140 of the electronic device after receiving the at least two second signals, so that the charging management module 140 of the electronic device adjusts a current charging policy according to the received at least two second signals; or when the communication unit receives a control instruction sent from the electronic device or the upper computer, the control instruction may be sent to a corresponding processing unit, for example, the power acquisition unit 210 or the level conversion unit 220.

Alternatively, each of the at least two electric storage units 142 may be a battery with a single battery cell, or may be a battery with multiple battery cells, where when each electric storage unit 142 is a battery with multiple battery cells, the multiple battery cells may be connected in series or parallel.

Alternatively, the number of the electric quantity collection units 210 may be one, and the single electric quantity collection unit 210 includes at least two collection interfaces, where the at least two collection interfaces are connected to the at least two electric storage units 142 in a one-to-one correspondence manner, and are configured to collect voltage information and/or current information of the at least two electric storage units 142 through the collection interfaces respectively.

Illustratively, the electric quantity collection unit 210 includes a collection interface 1, a collection interface 2, …, and a collection interface n, where the collection interface 1 is connected with the electric storage unit 1, the collection interface 2 is connected with the electric storage unit 2, the collection interface n is connected with the electric storage unit n, the collection interface 1 collects voltage information and/or current information of the electric storage unit 1 and transmits the voltage information and/or current information to the level conversion unit 220, the collection interface 2 collects voltage information and/or current information of the electric storage unit 2 and transmits the voltage information and/or current information to the level conversion unit 220, and the collection interface n collects voltage information and/or current information of the electric storage unit n and transmits the voltage information and/or current information to the level conversion unit 220.

Optionally, the number of the electric quantity collection units may be at least two, and the at least two electric quantity collection units are connected with the at least two electric storage units in a one-to-one correspondence manner.

Illustratively, the electric quantity collection unit 210 includes an electric quantity collection unit 1, electric quantity collection units 2, …, and an electric quantity collection unit n, the electric quantity collection unit 1 is connected with the electric storage unit 1, the electric quantity collection unit 2 is connected with the electric storage unit 2, the electric quantity collection unit n is connected with the electric storage unit n, the electric quantity collection unit 1 collects voltage information and/or current information of the electric storage unit 1 and transmits the voltage information and/or current information to the level conversion unit 220, the electric quantity collection unit 2 collects voltage information and/or current information of the electric storage unit 2 and transmits the voltage information and/or current information to the level conversion unit 220.

Alternatively, the number of the level conversion units 220 may be one, and when the number of the power collection units 210 may be one, the single level conversion unit 220 includes at least two conversion interfaces, and at least two collection interfaces of the single power collection unit 210 are respectively connected with at least two conversion interfaces in a one-to-one correspondence manner; when the number of the electric quantity collection units 210 can be at least two, the at least two electric quantity collection units 210 are respectively connected with the at least two conversion interfaces one by one.

Illustratively, when the number of the level converting units 220 is one and the number of the power collecting units 210 is one, as shown in fig. 4, the power collecting units 210 include a collecting interface 1, collecting interfaces 2, …, and a collecting interface n, and the level converting units 220 include a converting interface 1, converting interfaces 2, …, and a converting interface n. The acquisition interface 1 is connected with the conversion interface 1, the acquisition interface 2 is connected with the conversion interface 2, and the acquisition interface n is connected with the conversion interface n. The acquisition interface 1 acquires voltage information and/or current information of the power storage unit 1 and then transmits the voltage information and/or the current information to the conversion interface 1; the acquisition interface 2 acquires voltage information and/or current information of the power storage unit 2 and then transmits the voltage information and/or the current information to the conversion interface 2; the acquisition interface n transmits the voltage information and/or the current information of the electric storage unit n to the conversion interface n after the acquisition of the voltage information and/or the current information.

Illustratively, when the number of the level converting units 220 is one and the number of the power collecting units 210 may be at least two, as shown in fig. 5, the power collecting units 210 include a power collecting unit 1, a power collecting unit 2, …, and a power collecting unit n, and the level converting units 220 include a converting interface 1, a converting interface 2, …, and a converting interface n. The electric quantity acquisition unit 1 is connected with the conversion interface 1, the electric quantity acquisition unit 2 is connected with the conversion interface 2, and the electric quantity acquisition unit n is connected with the conversion interface n. The electric quantity acquisition unit 1 acquires voltage information and/or current information of the electric storage unit 1 and then transmits the voltage information and/or the current information to the conversion interface 1; the electric quantity acquisition unit 2 acquires voltage information and/or current information of the electric storage unit 2 and then transmits the voltage information and/or the current information to the conversion interface 2; the electric quantity acquisition unit n acquires voltage information and/or current information of the electric storage unit n and then transmits the voltage information and/or the current information to the conversion interface n.

Alternatively, the number of the level conversion units 220 may be at least two, and when the number of the electric quantity collection units 210 may be one, at least two collection interfaces of a single electric quantity collection unit 210 are respectively connected with at least two level conversion units 220 in a one-to-one correspondence manner; when the number of the power collecting units 210 may be at least two, the at least two power collecting units 210 are respectively connected to the at least two level converting units 220 one by one.

Illustratively, when the number of the level shift units 220 is at least two and the number of the power acquisition units 210 is one, as shown in fig. 6, the power acquisition units 210 include an acquisition interface 1, an acquisition interface 2, …, and an acquisition interface n, and the level shift units 220 include a level shift unit 1, a level shift unit 2, …, and a level shift unit n. The acquisition interface 1 is connected with the level conversion unit 1, the acquisition interface 2 is connected with the level conversion unit 2, and the acquisition interface n is connected with the level conversion unit n. The acquisition interface 1 acquires voltage information and/or current information of the power storage unit 1 and then transmits the voltage information and/or the current information to the level conversion unit 1; the acquisition interface 2 acquires voltage information and/or current information of the power storage unit 2 and then transmits the voltage information and/or the current information to the level conversion unit 2; the acquisition interface n transmits the voltage information and/or the current information of the electric storage unit n to the level conversion unit n after acquiring the voltage information and/or the current information.

Illustratively, when the number of the level shift units 220 is at least two and the number of the power acquisition units 210 is at least two, as shown in fig. 7, the power acquisition units 210 include a power acquisition unit 1, a power acquisition unit 2, …, a power acquisition unit n, and the level shift units 220 include a level shift unit 1, a level shift unit 2, …, and a level shift unit n. The electric quantity acquisition unit 1 is connected with the level conversion unit 1, the electric quantity acquisition unit 2 is connected with the level conversion unit 2, and the electric quantity acquisition unit n is connected with the level conversion unit n. The electric quantity acquisition unit 1 acquires voltage information and/or current information of the electric storage unit 1 and then transmits the information to the level conversion unit 1; the electric quantity acquisition unit 2 acquires voltage information and/or current information of the electric storage unit 2 and then transmits the information to the level conversion unit 2; the electric quantity acquisition unit n acquires voltage information and/or current information of the electric storage unit n and then transmits the voltage information and/or the current information to the level conversion unit n.

Alternatively, the communication unit 230 and the level conversion unit 220 may adopt a master-multiple-slave communication manner when transmitting data, that is, different receiving periods are set according to the priority of the power storage unit 142, that is, each receiving period corresponds to one power storage unit 142, so that transmission of multiple sets of data is implemented on one communication transmission link, for example, in one receiving period, the power storage unit 1 corresponds to the period 1, the power storage unit 2 corresponds to the period 2, the power storage unit n corresponds to the period n, and the communication unit 230 receives the second signal of the power storage unit 1 transmitted by the level conversion unit 220 in the period 1 of one receiving period; receiving the second signal of the electric storage unit 2 transmitted by the level conversion unit 220 in the period 2 of one reception cycle; the second signal of the electric storage unit n transmitted by the level conversion unit 220 is received in the period n of one reception cycle.

According to the electric quantity acquisition circuit, the electric quantity acquisition unit and the level conversion unit are arranged, the electric quantity acquisition unit is respectively connected with the electric storage unit and the level conversion unit, the level conversion unit is used for filtering common-mode voltage in current and voltage signals of the electric storage unit acquired by the electric quantity acquisition unit, normal communication can be carried out with the communication unit after information such as voltage and/or current of each electric storage unit is acquired when the electric storage units are connected in series, and therefore the communication unit can acquire information such as voltage and/or current of each electric storage unit, and real-time monitoring is conveniently carried out on each electric storage unit in series connection of multiple electric storage units.

Fig. 8 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application. As shown in fig. 8, the at least two electric storage units 142 include a first electric storage unit 1421 and at least one second electric storage unit 1422, wherein the negative electrode of the first electric storage unit 1421 is connected with the ground, and the at least one second electric storage unit 1422 is sequentially connected in series with the positive electrode of the first electric storage unit 1421; the electric quantity collection unit 210 specifically includes a first electric quantity collection unit 211 and at least one second electric quantity collection unit 212, where the first electric quantity collection unit 211 is configured to collect a current and/or a voltage of the first electric storage unit 1421, output a first signal corresponding to the first electric storage unit 1421, and use the first signal corresponding to the first electric storage unit 1421 to communicate with the communication unit 230; the at least one second power collection unit 212 is configured to collect a current and/or a voltage of each second electric storage unit 1422, and output at least one first signal corresponding to the at least one second electric storage unit 1422; the level conversion unit 220 is connected to the at least one second power collection unit 212, and is specifically configured to receive at least one first signal corresponding to the at least one second power storage unit 1422, filter a common mode voltage of each at least one first signal corresponding to the at least one second power storage unit 1422, and output at least one second signal.

Because the negative electrode of the first electric storage unit 1421 is directly connected to the ground, the common mode voltage included in the voltage signal and/or the current signal of the first electric storage unit 1421 acquired by the first electric quantity acquisition unit 211 is zero, so that the first electric quantity acquisition unit 211 can be directly connected to the communication unit 230 without performing level conversion by the level conversion unit 220, thereby reducing the number of devices of the electric quantity acquisition circuit and reducing the volume of the electric quantity acquisition circuit.

Fig. 9 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application. As shown in fig. 9, based on the power collection circuit shown in fig. 3, the power collection circuit may further include a first control unit 240, where the first control unit 240 is connected to the level conversion unit 220, and the first control unit 240 is configured to receive at least two second signals output by the level conversion unit 220, and output the at least two second signals to the communication unit 230 according to a preset signal transmission rule.

Alternatively, the foregoing signal transmission rule may be that the first control unit 240, after receiving at least two second signals output by the level conversion unit 220 by using a master-multiple-slave communication manner, combines the at least two second signals according to a time axis of one reception period to form a set of target signals including the at least two second signals, so as to transmit the target signals to the communication unit 230.

Illustratively, when the number of the level converting units 220 is one, the converting interface 1 of the level converting unit 220, upon receiving the current information and/or the voltage information of the electric storage unit 1, transmits the second signal 1 for representing the current information and/or the voltage information of the electric storage unit 1 to the first control unit 240 at the time period 1 of one receiving period; when the conversion interface 2 of the level conversion unit 220 receives the current information and/or the voltage information of the electric storage unit 2, the second signal 2 for representing the current information and/or the voltage information of the electric storage unit 2 is transmitted to the first control unit 240 at the time of the time period 2 of one reception cycle; when the conversion interface n of the level conversion unit 220 receives the current information and/or the voltage information of the electric storage unit n, a second signal n for representing the current information and/or the voltage information of the electric storage unit n is transmitted to the first control unit 240 at the time period n of one reception cycle. When the number of the level converting units 220 is at least two, the level converting unit 2201 transmits the second signal 1 for representing the current information and/or the voltage information of the electric storage unit 1 to the first control unit 240 at the time period 1 of one reception cycle when receiving the current information and/or the voltage information of the electric storage unit 1; when the level conversion unit 2202 receives the current information and/or the voltage information of the electric storage unit 2, it transmits a second signal 2 indicating the current information and/or the voltage information of the electric storage unit 2 to the first control unit 240 at the time of the time period 2 of one reception cycle; when the level conversion unit 220n receives the current information and/or the voltage information of the electric storage unit n, a second signal n indicating the current information and/or the voltage information of the electric storage unit n is transmitted to the first control unit 240 at the time period n of one reception cycle. After receiving the at least two second signals, the first control unit 240 integrates the at least two second signals into a target signal according to the sequence of the received time periods, and sends the target signal to the communication unit 230.

Fig. 10 is a schematic structural diagram of an electric quantity acquisition circuit according to an embodiment of the present application. As shown in fig. 10, based on the power collecting circuit shown in fig. 8, the power collecting circuit may further include a second control unit 241, where the second control unit 241 is connected to the first power collecting unit 211 and the level converting unit 220, respectively, and the second control unit 241 is configured to receive the first signal output by the first power collecting unit 211 and at least two second signals output by the level converting unit 220, and output the first signal and the at least two second signals to the communication unit 230 according to a preset signal transmission rule.

Alternatively, the foregoing signal transmission rule may be that the second control unit 241, after receiving the first signal output by the first power collecting unit 211 and the at least two second signals output by the level converting unit 220 by using a communication manner of one master and multiple slaves, combines the first signal and the at least two second signals according to a time axis of one receiving period to form a set of target signals including the first signal and the at least two second signals, so as to transmit the target signals to the communication unit 230.

Fig. 11 is a schematic structural diagram of a level shifter according to an embodiment of the present application. As shown in fig. 11, the level conversion unit 220 may include a data synchronization processing module 222 and a clock synchronization processing module 221, where the data synchronization processing module 222 is connected to the cathodes of the at least two power storage units 142 and the power collection unit 210, and the clock synchronization processing module 221 is connected to the cathodes of the at least two power storage units 142, the data synchronization processing module 222, and the power collection unit 210, respectively; the data synchronization processing module 222 is configured to generate a corresponding second signal according to a magnitude relation between a signal amplitude variation and a variation threshold value at any two adjacent moments of each first signal; the clock synchronization processing module 221 is configured to keep the sampling frequency of the power acquisition unit 210 consistent with the frequency of the clock signal of the communication unit 230, and the reciprocal of the sampling frequency is the same as the difference between any two adjacent moments of each first signal.

It should be appreciated that, the data synchronization processing module 222 operates synchronously with the clock synchronization processing module 221, so that after the data synchronization processing module 222 acquires the first signal in the electric quantity acquisition unit 210, the conversion of the second signal may operate synchronously with the acquisition of the first signal, where the conversion process of the second signal may be that the signal amplitude variation amount of any two adjacent moments of the first signal is determined in real time, when the signal amplitude variation amount of the first signal in any two moments exceeds the variation threshold, the data synchronization processing module 222 is triggered to generate a corresponding second signal, for example, when the signal amplitude of the first signal in the moment t0 is at a first low potential voltage, the signal amplitude in the moment t0+1 becomes a first high potential voltage, for example, the first low potential voltage includes a differential mode low voltage vln+vcn of the first signal corresponding to the common mode voltage Vcn of the power storage unit 142, and the first high potential voltage includes a differential mode high voltage vhn+vcn of the first signal corresponding to the common mode voltage Vcn, and the data synchronization processing module 222 is triggered to generate a second high potential voltage for communication with the second potential unit 230 in response to the signal amplitude of the first signal in the moment t 0+1; when the signal amplitude of the first signal at time t0 is at the first high potential voltage vhn+vcn and the signal amplitude at time t0+1 becomes the first low potential voltage vln+vcn, the data synchronization processing module 222 generates the second low potential voltage in response to the trigger signal of the signal amplitude change of the first signal at time t0+1, and the amplitude of the second low potential voltage is available for communication with the communication unit 230.

Optionally, the data synchronization processing module 222 may include a first trigger and a second trigger, where an input end of the first trigger is connected to the communication unit 230, and an output end of the first trigger is connected to the electric quantity acquisition unit 210, and is configured to send a data request signal sent by the communication unit 230 to the electric quantity acquisition unit 210; the input end of the second trigger is connected with the electric quantity acquisition unit 210, and the output end of the second trigger is connected with the communication unit 230, and is used for converting at least two first signals sent by the electric quantity acquisition unit 210 into at least two second signals.

It should be understood that the first flip-flop and the second flip-flop are both supplied with a second high potential voltage, for example, 3.3V or 1.8V, and a second low potential voltage, for example, ground GND, so that the first flip-flop or the second flip-flop outputs the second high potential voltage and the second low potential voltage, thereby forming the second signal in combination with the clock signal.

Optionally, the clock synchronization processing module 221 includes a third trigger, an input end of the third trigger is connected to the communication unit 230, and an output end of the third trigger is connected to the power collecting unit 210, so as to send the clock signal sent by the communication unit 230 to the power collecting unit 210, so as to ensure synchronization of the clock signals between the communication unit 230 and the power collecting unit 210.

It should be noted that, the above-mentioned synchronous communication protocol for implementing the clock signal and the data signal between the communication unit 230 and the power acquisition unit 210 adopts conventional technical means, such as an integrated circuit bus (Inter-INTEGRATED CIRCUIT, I2C), a serial peripheral interface (SERIAL PERIPHERAL INTERFACE, SPI), a universal asynchronous receiver/Transmitter (Universal Asynchronous Receiver/Transmitter, UART), etc., which are set by those skilled in the art according to actual needs, and will not be repeated herein.

Fig. 12 is a schematic structural diagram of a level shifter according to an embodiment of the present application. As shown in fig. 12, based on the level shift unit 220 shown in fig. 11, the level shift unit 220 may further include a controller 223, a first switch 224, and a second switch 225, the negative electrode of the electric storage unit 142 is connected to the clock synchronization processing module 221 via the first switch 224, the negative electrode of the electric storage unit 142 is connected to the data synchronization processing module 222 via the second switch 225, and the controller 223 is connected to the communication unit 230, the data synchronization processing module 222, the first switch 224, and the second switch 225, respectively; the controller 223 is configured to receive the start-up instruction sent by the communication unit 230, generate and send a first on instruction to the first switch 224 and a second on instruction to the second switch 225 based on the start-up instruction; the first switch 224 is configured to receive a first turn-on instruction, and control the negative electrode of the electric storage unit 142 to be in a connection state with the clock synchronization processing module 221; the controller 223 is further configured to send at least two second signals output by the data synchronization processing module 222 to the communication unit 230.

It should be understood that, in the initial state, the first switch 224 and the second switch 225 are in the off state, the data synchronization processing module 222 and the clock synchronization processing module 221 are in the low level state, the communication unit 230 and the power collecting unit 210 cannot be in the communication state, and after the communication unit 230 sends the start command to the level converting unit 220, the controller 223 generates the first on command sent to the first switch 224 and the second on command sent to the second switch 225, so that the data synchronization processing module 222 and the clock synchronization processing module 221 are in the high level state, and the communication operation between the communication unit 230 and the power collecting unit 210 can be performed.

Optionally, after the first switch 224 and the second switch 225 are in the on state, the controller 223 may further receive an access instruction sent by the communication unit 230, so as to feed back the open/close states of the first switch 224 and the second switch 225 to the communication unit 230, so that the communication unit 230 controls the working states of the data synchronization processing module 222 and the clock synchronization processing module 221.

Optionally, the controller 223 may further receive a close instruction sent by the communication unit 230 to generate a first open instruction sent to the first switch 224 and a second open instruction sent to the second switch 225, so that the communication unit 230 controls the data synchronization processing module 222 and the clock synchronization processing module 221 to be in an inactive state, and cannot perform a communication operation between the communication unit 230 and the power collection unit 210.

Optionally, the controller 223 may include an instruction controller, a switch, and a data controller, where the instruction controller is connected to the communication unit 230, the data controller, the switch, the first switch 224, and the second switch 225, and the data controller is further connected to the switch, the communication unit 230, and the data synchronization processing module 222; the instruction controller is configured to receive the start instruction sent by the communication unit 230, generate and send a first on instruction to the first switch 224 and a second on instruction to the second switch 225 based on the start instruction; the instruction controller is configured to receive the access instruction sent by the communication unit 230, generate and send a switch on/off state signal to the communication unit 230 based on the access instruction; the change-over switch is used for sending a switch on-off state signal or a second signal to the communication unit 230; the data controller is used for outputting a control signal of the change-over switch so that the change-over switch transmits a second signal or a switch on-off state signal.

For example, taking the communication between the communication unit 230 and the power collection unit 210 through I2C as shown in fig. 13, the communication unit 230 includes two I2C interfaces including a clock signal interface SCL and a data signal interface SDA, the power collection unit 210 includes two I2C interfaces including a 210 clock signal interface scl_bat and a data signal interface sda_bat, the communication unit 230 sends a start command to the LS I2C Controller, the LS I2C Controller generates and sends a first on command to the first switch S1 and sends a second on command to the second switch S2 based on the start command, the scl_bat and the sda_bat are connected to the negative electrode BAT2n+vbat_i2 of the corresponding power storage unit through a pull-up resistor, the communication unit 230 guarantees clock signal synchronization between SCL and scl_bat through the first trigger D1, the second trigger D2 guarantees data signal synchronization between scl_bat, the second trigger D2 outputs a second signal to the second Controller SDAController, SDA, and the second switch S2 is controlled to switch the second switch S3, and the second switch S2 is controlled to switch the second switch is turned on. If the communication unit 230 needs to access the internal register of the LS I2C to control the opening and closing of the first switch S1 and the second switch S2 after the first switch S1 and the second switch S2 are turned on, the communication unit 230 sends an access command to the LS I2C and SDAController to enable the LS I2C to output the internal register data sda_ls and SDAController to output the control signal sda_sel to the switch S3, so that the output of the switch S3 becomes sda_ls. If communication unit 230 transmits a closing instruction to generate a first opening instruction transmitted to first switch S1 and a second opening instruction transmitted to second switch S2 to disconnect the connection between the negative electrode of the electric storage unit and scl_bat and sda_bat.

Fig. 14 is a schematic structural diagram of an electric quantity collection unit according to an embodiment of the present application. As shown in fig. 14, the electric quantity collection unit 210 may include a first sampling resistor Rs1 and a first sampling circuit, where the first sampling circuit includes a first voltage sampling end, a first current sampling end, and a second current sampling end, one end of the first sampling resistor Rs1 is connected to the negative electrode of the electric storage unit 142 and the first current sampling end, and the second current sampling end is connected to the other end of the first sampling resistor Rs1, and the first voltage sampling end is connected to the positive electrode of the electric storage unit 142.

Optionally, the first sampling circuit may include a differential current detection module and an electric quantity detection module, where a reference voltage of the differential current detection module is a voltage of the first voltage sampling end, a first input end of the differential current detection module is connected to the first current sampling end, and a second input end of the differential current detection module is connected to the second current sampling end, so that the differential current detection module outputs a current signal of the electric storage unit 142, and the electric quantity detection module calculates the electric quantity signal of the electric storage unit 142 according to the voltage of the first voltage sampling end after receiving the current signal.

It should be understood that, in the above-mentioned electric quantity collection unit 210, the first sampling resistor Rs1 is connected to the negative electrode of the electric storage unit 142, and then the voltage Vrs across the first sampling resistor Rs can be sampled by the first current sampling terminal and the second current sampling terminal, the current information Isen flowing through the electric storage unit 142 can be obtained through isen=vrs/Rs, and the voltage information Vsen of the electric storage unit 142 can be obtained by the first voltage sampling terminal connected to the positive electrode of the electric storage unit 142, where the voltage information Vsen and the current information Isen both include the common mode voltage of the electric storage unit 142.

Fig. 15 is a schematic structural diagram of an electric quantity collection unit according to an embodiment of the present application. As shown in fig. 15, the electric quantity collection unit 210 may include a second sampling resistor Rs2 and a second sampling circuit, where the second sampling circuit includes a second voltage sampling end and a third current sampling end, one end of the second sampling resistor Rs2 is connected to the third current sampling end, and the other end of the second sampling resistor Rs2 is respectively connected to the second voltage sampling end and the positive electrode of the electric storage unit.

Optionally, the second sampling circuit may include a differential current detection module and an electric quantity detection module, where a reference voltage of the differential current detection module is a voltage of the second voltage sampling end, a first input end of the differential current detection module is connected to the third current sampling end, and a second input end of the differential current detection module is connected to the second voltage sampling end, so that the differential current detection module outputs a current signal of the electric storage unit, and the electric quantity detection module calculates the electric quantity signal of the electric storage unit according to the voltage of the second voltage sampling end after receiving the current signal.

It should be understood that, in the above-mentioned electric quantity collection unit 210, the second sampling resistor Rs2 is connected to the positive electrode of the electric storage unit, and then the voltage Vrs at two ends of the second sampling resistor Rs can be sampled by the second voltage sampling end and the third current sampling end, and the current information Isen flowing through the battery is obtained through isen=vrs/Rs.

Through the description of the above embodiments, it can be understood by a person skilled in the art that, for convenience and brevity of description, only the division of the above functional modules is illustrated, in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the circuit is divided into different functional modules, or the above functional allocation may be performed by the same functional module, that is, the internal structure of the circuit is integrated into one functional module, so as to complete all or part of the functions described above.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely an embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electric quantity collection circuit, characterized in that it is applied to an electronic device including at least two electric storage units connected in series with each other, said circuit comprising:

the electric quantity acquisition unit is connected with the at least two electric storage units and used for acquiring the current and/or the voltage of each electric storage unit in the at least two electric storage units and generating at least two first signals, and each first signal is used for indicating the current and/or the voltage of the corresponding electric storage unit;

The level conversion unit is connected with the electric quantity acquisition unit and is used for receiving part or all of the first signals, filtering the common mode voltage of each first signal in the part or all of the first signals and outputting at least two second signals, wherein the at least two second signals correspond to the at least two first signals one by one;

and the communication unit is used for receiving the at least two second signals.

2. The circuit of claim 1, wherein the number of power harvesting units is at least two, the at least two power harvesting units being connected in one-to-one correspondence with the at least two power storage units to generate the at least two first signals.

3. The circuit according to claim 1 or 2, wherein the number of the level shift units is at least one, wherein in the case where the number of the electric quantity collection units is at least two and the number of the level shift units is one, the level shift units include at least two shift interfaces, which are connected in one-to-one correspondence with the at least two electric quantity collection units; and under the condition that the number of the electric quantity acquisition units is at least two and the number of the level conversion units is at least two, the at least two level conversion units are connected with the at least two electric quantity acquisition units in a one-to-one correspondence manner.

4. The circuit of claim 1, wherein the at least two electrical storage units comprise a first electrical storage unit and at least one second electrical storage unit, the negative electrode of the first electrical storage unit being connected to ground, the positive electrode of the first electrical storage unit being connected to the at least one second electrical storage unit;

The electric quantity acquisition unit specifically comprises a first electric quantity acquisition unit and at least one second electric quantity acquisition unit, wherein:

The first electric quantity acquisition unit is used for acquiring current and/or voltage of the first electric storage unit and outputting a first signal corresponding to the first electric storage unit, and the first signal corresponding to the first electric storage unit is used for communicating with the communication unit;

the at least one second electric quantity acquisition unit is used for acquiring the current and/or the voltage of each second electric storage unit and outputting at least one first signal corresponding to the at least one second electric storage unit;

the level conversion unit is connected with the at least one second electric quantity acquisition unit, and is specifically configured to receive the at least one first signal corresponding to the at least one second electric storage unit, filter the common mode voltage of the at least one first signal corresponding to the at least one second electric storage unit, and output at least one second signal.

5. A circuit as claimed in any one of claims 1 to 3, further comprising a first control unit connected to the level shift unit, the first control unit being configured to receive the at least two second signals output by the level shift unit and output the at least two second signals to the communication unit according to a preset signaling rule.

6. The circuit of claim 4, further comprising a second control unit connected to the first power collecting unit and the level converting unit, respectively, the second control unit being configured to receive the first signal output by the first power collecting unit and the at least two second signals output by the level converting unit, and output the first signal and the at least two second signals to the communication unit according to a preset signal transmission rule.

7. The circuit according to any one of claims 1 to 4, wherein the level conversion unit includes a data synchronization processing module and a clock synchronization processing module, the data synchronization processing module is connected to the negative poles of the at least two electric storage units and the electric quantity acquisition unit, respectively, and the clock synchronization processing module is connected to the negative poles of the at least two electric storage units, the data synchronization processing module, and the electric quantity acquisition unit, respectively;

the data synchronization processing module is used for generating a corresponding second signal according to the magnitude relation between the signal amplitude variation of any two adjacent moments of each first signal and the variation threshold;

The clock synchronization processing module is used for keeping the sampling frequency of the electric quantity acquisition unit consistent with the frequency of the clock signal of the communication unit, and the reciprocal of the sampling frequency is the same as the difference value between any two adjacent moments of each first signal.

8. The circuit of claim 7, wherein the data synchronization processing module comprises a first flip-flop and a second flip-flop;

The input end of the first trigger is connected with the communication unit, and the output end of the first trigger is connected with the electric quantity acquisition unit and is used for sending a data request signal sent by the communication unit to the electric quantity acquisition unit;

the input end of the second trigger is connected with the electric quantity acquisition unit, and the output end of the second trigger is connected with the communication unit and is used for converting the at least two first signals sent by the electric quantity acquisition unit into the at least two second signals.

9. The circuit according to claim 7 or 8, wherein the clock synchronization processing module comprises a third trigger, an input end of the third trigger is connected with the communication unit, and an output end of the third trigger is connected with the electric quantity acquisition unit and is used for sending a clock signal sent by the communication unit to the electric quantity acquisition unit.

10. The circuit of claim 9, wherein the level shift unit further comprises a controller, a first switch, and a second switch, the negative electrode of the electric storage unit is connected to the clock synchronization processing module via the first switch, the negative electrode of the electric storage unit is connected to the data synchronization processing module via the second switch, and the controller is connected to the communication unit, the data synchronization processing module, the first switch, and the second switch, respectively;

The controller is used for receiving a starting instruction sent by the communication unit, generating and sending a first conduction instruction to the first switch and a second conduction instruction to the second switch based on the starting instruction;

The first switch is used for receiving the first conduction instruction and controlling the negative electrode of the electric storage unit to be in a connection state with the clock synchronization processing module;

the second switch is used for receiving the second conduction instruction and controlling the negative electrode of the electric storage unit to be in a connection state with the data synchronization processing module;

The controller is further configured to send the at least two second signals output by the data synchronization processing module to the communication unit.

11. The circuit of any one of claims 1-10, wherein the electrical quantity collection unit comprises a first sampling resistor and a first sampling circuit, the first sampling circuit comprises a first voltage sampling end, a first current sampling end and a second current sampling end, one end of the first sampling resistor is respectively connected with the negative electrode of the electric storage unit and the first current sampling end, the second current sampling end is connected with the other end of the first sampling resistor, and the first voltage sampling end is connected with the positive electrode of the electric storage unit; or alternatively, the first and second heat exchangers may be,

The electric quantity acquisition unit comprises a second sampling resistor and a second sampling circuit, the second sampling circuit comprises a second voltage sampling end and a third current sampling end, one end of the second sampling resistor is connected with the third current sampling end, and the other end of the second sampling resistor is respectively connected with the second voltage sampling end and the positive electrode of the electric storage unit.

12. An electronic device comprising the electrical quantity collection circuit of any one of claims 1 to 11.