Battery cell control protection system and method

Abstract

The invention provides a battery cell control protection system and method. The battery cell control protection system comprises a power supply module, a logic control module, a switching control module and a battery cell sampling equalization module, the power supply module is used for converting main power supply input into a plurality of output voltages to be used by relays in the logic control module and the switching control module; the logic control module is used for controlling a relay connected to a battery cell power channel corresponding to the battery cell to be closed, and controlling the relay connected to the battery cell power channel corresponding to the generated abnormal voltage to be disconnected when the battery cell sampling equalization module collects the abnormal voltage; and the battery cell sampling and balancing module is used for collecting the battery cell voltage of each battery cell through a plurality of sampling channels, carrying out passive balancing in each sampling channel, and feeding back the channel address corresponding to the abnormal voltage to the logic control module when the abnormal voltage is sampled. The method has controllability, expansibility and safety, and the application flexibility, safety and reliability of the energy storage system in multiple scenes are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy storage control, and more particularly, to a battery cell control and protection system and method. Background Art

[0002] With the rapid development of new energy storage technologies, energy storage systems have been widely used in fields such as power peak shaving, backup power supplies, and smart grids. Among them, modular and cascaded energy storage architectures have become the mainstream system construction methods due to their advantages such as flexible expansion and easy maintenance. However, in the design of existing energy storage products, each energy storage module of the cascaded energy storage system is connected in series or parallel through the main power path (main positive / main negative) to construct the overall system. However, most current systems lack the ability to automatically switch the main power path. Once a module fails or its performance deteriorates, manual disconnection or replacement is required, which is inconvenient to operate, easily leads to system downtime, and reduces the overall stability.

[0003] Moreover, during the product R & D and production testing phases, the energy storage system involves functions such as voltage acquisition, temperature monitoring, and equalization control of multiple battery cells. Currently, it often relies on single-channel sequential testing and cannot simultaneously verify multiple signals in parallel, resulting in low testing efficiency and a long development cycle. In addition, during the operation of the energy storage system, if a certain battery cell shows severe imbalance or abnormal voltage drop (such as short circuit or over-discharge), it is difficult for traditional systems to actively disconnect the abnormal path in a timely manner, posing potential risks of current backflow, energy imbalance, and even safety accidents. Although some systems have software protection mechanisms, they lack fast cutting-off capabilities at the hardware level and have insufficient reliability. Summary of the Invention

[0004] Embodiments of the present disclosure provide at least a battery cell control and protection system and method, which can combine controllability, scalability, and security, and improve the application flexibility, safety, and reliability of the energy storage system in multiple scenarios.

[0005] Embodiments of the present disclosure provide a battery cell control and protection system, including: a power supply module, a logic control module, a switching control module, and a battery cell sampling and equalization module;

[0006] The power supply module is configured to convert the main power supply input into multiple output voltages for use by the relays in the logic control module and the switching control module;

[0007] The logic control module is configured to control the relay connected to the corresponding battery cell power path of the battery cell to close, and when the battery cell sampling and equalization module acquires an abnormal voltage, control the relay connected to the battery cell power path corresponding to the abnormal voltage to open;

[0008] The battery cell sampling and balancing module is used to collect the battery cell voltages of each battery cell through multiple sampling channels and perform passive balancing in each of the sampling channels, and when the abnormal voltage is sampled, feedback the channel address corresponding to the abnormal voltage to the logic control module.

[0009] In an optional implementation manner, the logic control module includes a micro control unit, at least one decoder, and at least one driver. The micro control unit is specifically configured to:

[0010] Output a sampling and balancing control signal to the connected decoder through the micro control unit;

[0011] The decoder decodes the sampling and balancing control signal and outputs it to the driver, and the driver drives the relay to close.

[0012] In an optional implementation manner, the micro control unit is further specifically configured to:

[0013] When the micro control unit detects the abnormal voltage, output a protection control signal carrying the channel address corresponding to the abnormal voltage to the connected decoder;

[0014] The decoder resolves the sampling channel address into a specific channel selection and sends the specific channel selection to the connected driver;

[0015] The driver drives the corresponding relay to disconnect according to the specific channel selection.

[0016] In an optional implementation manner, the power supply module is specifically configured to:

[0017] Convert the main power supply input into a first power supply source, and the first power supply source outputs a first voltage for the use of the micro control unit and a second voltage for the use of the decoder;

[0018] Convert the main power supply input into a second power supply source, and the second power supply source outputs a third voltage for the use of the driver and the relay.

[0019] In an optional implementation manner, the control signal output pin of the micro control unit is connected to the signal input pin of the decoder, and the enable output pin of the micro control unit is connected to the enable pin of the decoder;

[0020] The signal output pin of the decoder is connected to the signal input pin of the driver;

[0021] Each signal output pin of the driver is respectively connected to one end of the relay coil in the corresponding relay, and the other end of the relay coil is connected to the third voltage.

[0022] In an alternative embodiment, the battery cell sampling and balancing module includes an AFE chip and a passive balancing circuit;

[0023] The AFE chip has a plurality of the sampling channels, and each of the sampling channels corresponds to sampling one of the battery cells;

[0024] The passive balancing circuit is provided between two adjacent ones of the sampling channels.

[0025] In an alternative embodiment, for a cascaded energy storage system, the relay is disposed on the positive main power path or the negative main power path of the battery output.

[0026] The embodiments of the present disclosure further provide a battery cell control and protection method, which is applied to the logic control module in any one of the battery cell control and protection systems as described in the above embodiments. The battery cell control and protection system further includes the switching control module and the battery cell sampling and balancing module. The method includes:

[0027] In a normal working state, controlling the relay included in the switching control module to close, so as to trigger the battery cell sampling and balancing module to perform sampling and passive balancing for each battery cell;

[0028] Real-time monitoring the battery cell voltages sampled by the battery cell sampling and balancing module, and when detecting that the battery cell voltages are abnormal, controlling the relay connected to the power path of the battery cell corresponding to the abnormal voltage to disconnect.

[0029] The embodiments of the present disclosure further provide an electronic device, including: a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the electronic device runs, the processor communicates with the memory through the bus. When the machine-readable instructions are executed by the processor, the steps in the above battery cell control and protection method are executed.

[0030] The embodiments of the present disclosure further provide a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, the steps in the above battery cell control and protection method are executed.

[0031] The embodiments of the present disclosure further provide a computer program product, including a computer program / instructions. When the computer program and instructions are executed by a processor, the steps in the above battery cell control and protection method are implemented.

[0032] The disclosed embodiment provides a cell control and protection system and method, wherein the cell control and protection system includes: a power supply module, a logic control module, a switching control module, and a cell sampling and balancing module; the power supply module is used to convert the main power supply input into multiple output voltages for use by the relays in the logic control module and the switching control module; the logic control module is used to control the closure of the relay connected to the cell power path corresponding to the cell, and when the cell sampling and balancing module collects an abnormal voltage, control the disconnection of the relay connected to the cell power path corresponding to the abnormal voltage; the cell sampling and balancing module is used to collect the cell voltage of each cell through multiple sampling channels and perform passive balancing in each of the sampling channels, and when the abnormal voltage is sampled, feed back the channel address corresponding to the abnormal voltage to the logic control module. It can have both controllability, scalability, and safety, and improve the application flexibility and safety and reliability of the energy storage system in multiple scenarios.

[0033] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. The drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and, together with the specification, are used to illustrate the technical solutions of the present disclosure. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without inventive effort.

[0035] Figure 1 A schematic diagram of a battery cell control and protection system provided by an embodiment of the present disclosure is shown;

[0036] Figure 2 A schematic diagram of another battery cell control and protection system provided by an embodiment of the present disclosure is shown;

[0037] Figure 3 A schematic diagram of a cell sampling and balancing module provided in an embodiment of the present disclosure is shown;

[0038] Figure 4 A flow chart of a cell control and protection method provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only some, but not all, of the embodiments of the present disclosure. The components of the embodiments of the present disclosure described and illustrated herein can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but merely represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0040] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] As used herein, the term "and / or" merely describes an associated relationship and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" as used herein means any one of a plurality or any combination of at least two of a plurality. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set composed of A, B, and C.

[0042] It has been found through research that in the design of existing energy storage products, each energy storage module of a cascaded energy storage system is connected in series or parallel through a main power path (main positive / main negative) to construct the overall system. However, most current systems lack the ability to automatically switch the main power path. Once a module fails or its performance deteriorates, it is necessary to rely on manual disconnection or replacement, which is inconvenient to operate, easily leads to system downtime, and reduces overall stability. Moreover, during the product R & D and production test stages, the energy storage system involves functions such as voltage acquisition, temperature monitoring, and equalization control of multiple battery cells. Currently, it often relies on single-channel sequential testing and cannot simultaneously verify multiple signals in parallel, resulting in low test efficiency and a long development cycle. In addition, during the operation of the energy storage system, if a battery cell experiences severe imbalance or abnormal voltage drop (such as short circuit or over-discharge), it is difficult for traditional systems to actively disconnect the abnormal path in a timely manner, posing potential risks of current backflow, energy imbalance, and even safety accidents. Although some systems have software protection mechanisms, they lack fast cut-off capabilities at the hardware level and have insufficient reliability.

[0043] Based on the above research, the present disclosure provides a battery cell control and protection system and method, the battery cell control and protection system includes: a power supply module, a logic control module, a switching control module and a battery cell sampling and balancing module; the power supply module is used to convert the main power supply input into multiple output voltages for use by the relays in the logic control module and the switching control module; the logic control module is used to control the closure of the relay connected to the battery cell power path corresponding to the battery cell, and when the battery cell sampling and balancing module collects an abnormal voltage, controls the disconnection of the relay connected to the battery cell power path corresponding to the abnormal voltage; the battery cell sampling and balancing module is used to collect the battery cell voltage of each battery cell through multiple sampling channels and perform passive balancing in each of the sampling channels, and when the abnormal voltage is sampled, the channel address corresponding to the abnormal voltage is fed back to the logic control module. It can have both controllability, scalability and safety, and improve the application flexibility and safety and reliability of the energy storage system in multiple scenarios.

[0044] To facilitate understanding of this embodiment, a cell control and protection system disclosed in the embodiment of the present disclosure is first described in detail. Figure 1 , which is a schematic diagram of a battery cell control and protection system provided by an embodiment of the present disclosure.

[0045] like Figure 1 As shown in , the battery cell control and protection system provided in the embodiment of the present application includes: a power supply module, a logic control module, a switching control module and a battery cell sampling and balancing module.

[0046] Specifically, the power supply module is used to convert the main power supply input into multiple output voltages for use by the logic control module and the relays in the switching control module; the logic control module is used to control the closure of the relay connected to the power path of the battery cell corresponding to the battery cell, and when the battery cell sampling and balancing module collects an abnormal voltage, controls the disconnection of the relay connected to the power path of the battery cell corresponding to the abnormal voltage; the battery cell sampling and balancing module is used to collect the battery cell voltage of each battery cell through multiple sampling channels and perform passive balancing in each sampling channel, and when an abnormal voltage is sampled, the channel address corresponding to the abnormal voltage is fed back to the logic control module.

[0047] In practice, the power supply module converts the main power input into multiple output voltage levels. These output voltages provide operating voltages for the microcontroller unit (MCU) and decoder in the logic control module, as well as driving power for the relays and drivers in the switching control module. The logic control module also controls the on / off switching of relays connected to the cell power path based on a control strategy.

[0048] Here, when the cell sampling and balancing module does not detect any abnormality, the logic control module controls the relay to close, and the cell voltage signal can be input normally; when the cell sampling and balancing module detects an abnormal voltage in a certain cell, the logic control module receives the feedback channel address and controls the relay on the corresponding cell power path to disconnect, so as to achieve the isolation and protection of the faulty cell.

[0049] Among them, the cell sampling and balancing module includes multiple sampling channels, and each sampling channel is used to collect the voltage signal of the corresponding cell. At the same time, a passive balancing circuit is set between adjacent channels to achieve voltage equalization adjustment between cells. When a certain channel detects voltage abnormality (such as too low voltage or abnormal fluctuation), the module feeds back the address information of this channel to the logic control module so that the latter can execute the disconnection operation of the corresponding relay.

[0050] In this way, through the above structure and working mode, precise control and fault protection of single cells can be achieved, especially suitable for scenarios with high requirements for cell safety in energy storage systems. At the same time, this system supports modular expansion and fast response, and has good engineering adaptability and practical application value.

[0051] Further, refer to Figure 2 shown, which is a schematic diagram of another cell control and protection system provided by an embodiment of the present disclosure. As Figure 2 shown in, the cell control and protection system provided by an embodiment of the present application includes: a power supply module, a logic control module, a switching control module, and a cell sampling and balancing module (not shown in the figure). The logic control module includes a micro control unit, at least one decoder, and at least one driver.

[0052] Specifically, the micro control unit is specifically used to output a sampling and balancing control signal to the connected decoder through the micro control unit; the decoder decodes the sampling and balancing control signal and outputs it to the driver, and the driver drives the relay to close. When the micro control unit detects an abnormal voltage, it outputs a protection control signal carrying the channel address corresponding to the abnormal voltage to the connected decoder; the decoder resolves the sampling channel address into a specific channel selection and sends the specific channel selection to the connected driver; the driver drives the corresponding relay to disconnect according to the specific channel selection. The power supply module is specifically used to: convert the main power supply input into a first power supply, and the first power supply outputs a first voltage for the micro control unit to use and a second voltage for the decoder to use; convert the main power supply input into a second power supply, and the second power supply outputs a third voltage for the driver and the relay to use.

[0053] Here, the control signal output pin of the microcontroller unit is connected to the signal input pin of the decoder, and the enable output pin of the microcontroller unit is connected to the enable pin of the decoder; the signal output pin of the decoder is connected to the signal input pin of the driver; each signal output pin of the driver is respectively connected to one end of the relay coil in the corresponding relay, and the other end of the relay coil is connected to the third voltage.

[0054] In a specific implementation, the microcontroller unit is used to output a sampling equalization control signal to the connected decoder. The decoder decodes the sampling equalization control signal and outputs it to the driver, and the driver further drives the target relay to close to realize the connection of the power path of the target battery cell. When the microcontroller unit detects an abnormal voltage signal from the battery cell sampling equalization module, the microcontroller unit outputs a protection control signal including the sampling channel address corresponding to the abnormal voltage to the decoder. After receiving the control signal, the decoder resolves the channel address into a specific channel selection signal and outputs it to the connected driver, and the driver drives the corresponding relay to open to realize the hardware isolation of the power path of the battery cell with the abnormality, ensuring the safe operation of the system.

[0055] Here, the power supply module is configured to: convert the main power supply input into a first power supply source, and output two voltages from the first power supply source, namely the first voltage (such as +3.3V) for the microcontroller unit to use and the second voltage (such as +5V) for the decoder to use; at the same time, convert the main power supply input into a second power supply source, and output a third voltage (such as +12V or VCC) from this power supply source to provide a driving power supply for the driver and the relay coil.

[0056] Furthermore, the microcontroller unit has multiple groups of output pins, specifically including: control signal output pins (such as M1~M3, M7~M9), which are used to output sampling equalization control signals and are connected to the data input pins of the decoder one by one, and enable output pins (such as M4~M6) are used to output enable signals to the enable end of the decoder to enable or disable the decoding function of the decoder.

[0057] Here, the decoder is a 3-to-8 structure (such as 74HC138), its data input terminals are correspondingly connected to the control signal output pins of the microcontroller unit (such as M1~M3, M7~M9), the enable input terminal G1 is connected to the enable output pin of the microcontroller unit, and G2A and G2B are grounded or at a low level; the output terminals are connected to the input terminals of the driver, and output signals to the driver according to the specific channel selection (D1~D16) to control the specific channels. When the microcontroller unit outputs a sampling equalization control signal (data bit + enable), the decoder pulls down one corresponding output channel, and the rest remain high level.

[0058] Here, the driver is a Darlington transistor array chip (such as ULN2003A), which is used to convert the low-level signal output by the decoder into a large-current signal to drive the relay. The input end of the driver is correspondingly connected to the output end of the decoder, and the output ends of the driver are respectively connected to one end of the relay coil. A freewheeling diode is integrated in each relay coil corresponding to the output. The other end of the relay coil is connected to the third voltage VCC (such as +12V) provided by the power supply module. When the signal of a certain input (D1 - D16) is at a low level, the corresponding output pin conducts to form a loop, and the relay is attracted.

[0059] Among them, the relay is installed in each cell power path to control whether the cell is connected to the cell sampling and balancing module. One end of each relay coil is connected to the driver output, and the other end is connected to VCC.

[0060] Exemplarily, in the normal sampling state, the microcontroller outputs a certain control address such as M1 - M3 as "011", and the decoder outputs a low level at the output terminal Y3; the input terminal IN4 of the driver receives a low level, the output terminal OUT4 conducts, and the corresponding relay K4 coil forms a loop, the relay is attracted, the cell is connected to the cell sampling and balancing module, and the voltage signal is normally input to the sampling channel. In the abnormal protection state, the microcontroller detects that the voltage of a certain channel (such as the 3rd channel) is abnormal, outputs a protection signal with the channel address "010", the decoder output terminal Y2 outputs a low level, the input terminal IN3 of the driver is triggered, the output terminal OUT3 is pulled low, the relay K3 is released (disconnected), the cell is disconnected from the sampling module, forming electrical isolation, and at the same time, an alarm mechanism or a redundancy switching mechanism can be triggered.

[0061] It should be noted that the decoder and the driver can be selected according to actual needs, and no specific limitation is made here. For the cascaded energy storage system, the relay can be set on the positive main power path or the negative main power path of the battery output. In the cascaded energy storage system, if backup batteries are placed at the same time, the cell control and protection system can directly switch to the backup energy storage battery product to reduce the system application risk of the cascaded energy storage product (for example, if one or more of the cascaded units are found to have problems, at this time, the cell control and protection system switches to the backup battery product, and the system can still work normally).

[0062] Further, as shown in Figure 3 is a schematic diagram of a cell sampling and balancing module provided by an embodiment of the present disclosure. As shown in Figure 3 , the cell sampling and balancing module includes an AFE chip and a passive balancing circuit; the AFE chip has multiple sampling channels, and each sampling channel corresponds to sampling one cell; a passive balancing circuit is provided between two adjacent sampling channels.

[0063] In a specific implementation, the cell sampling and balancing module includes an AFE chip (analog front-end chip), such as TI's bq769x0 series, which has multiple built-in sampling channels, each channel corresponding to a cell, and a balancing control output port for controlling the on / off of an external balancing circuit. The passive balancing circuit is arranged between two adjacent cells, and the structure includes the following components: a power balancing resistor (such as R10, R15, R20, etc.), one end of which is connected to the positive pole of the corresponding cell and the other end is grounded through a switching device; a switching device (such as NPN transistor Q4 / Q6 / Q7 / Q8), the base of which is connected to the AFE control signal, the collector of which is connected to the cell, and the emitter of which is grounded; an indicator diode (such as D1~D8), which is used to display whether the balancing channel is in the on state during the balancing process; a protection resistor and a filter capacitor (such as R6 / R11 and C4 / C5) for front-end impedance matching and noise filtering of the sampling channel to improve sampling accuracy.

[0064] During the cell sampling phase, the AFE chip collects the voltage of each cell through its multiple channels. The sampling frequency is configurable, such as 10ms to 100ms per sample, and the sampling results are transmitted to the microcontroller unit (MCU). During the balancing phase, the AFE outputs a control signal to the base of the corresponding transistor. When the transistor turns on, the connected balancing resistor forms a loop. The high-voltage cell releases some of its energy to ground through the balancing resistor, achieving a consistent voltage drop across the cells. During the balancing process, an LED indicator lights up for manual identification.

[0065] A cell control and protection system provided by an embodiment of the present disclosure includes: a power supply module, a logic control module, a switching control module, and a cell sampling and balancing module; the power supply module is used to convert the main power supply input into multiple output voltages for use by the relays in the logic control module and the switching control module; the logic control module is used to control the closure of the relay connected to the cell power path corresponding to the cell, and when the cell sampling and balancing module collects an abnormal voltage, control the disconnection of the relay connected to the cell power path corresponding to the abnormal voltage; the cell sampling and balancing module is used to collect the cell voltage of each cell through multiple sampling channels and perform passive balancing in each of the sampling channels, and when the abnormal voltage is sampled, the channel address corresponding to the abnormal voltage is fed back to the logic control module. It can have both controllability, scalability and safety, and improve the application flexibility and safety and reliability of the energy storage system in multiple scenarios.

[0066] Secondly, based on the same inventive concept, a cell control and protection method disclosed in an embodiment of the present disclosure is described in detail. The execution subject of the cell control and protection method provided in the embodiment of the present disclosure is as follows: Figure 1 - Figure 2The logic control module in the cell control and protection system is shown in . In some possible implementations, the cell control and protection method can be implemented by a processor calling a computer-readable instruction stored in a memory.

[0067] See also Figure 4 As shown, it is a flow chart of a cell control protection method provided by an embodiment of the present disclosure, which is applied to Figure 1 - Figure 2 The logic control module in the cell control and protection system shown in FIG. , the cell control and protection system further includes the switching control module and the cell sampling and balancing module, and the method includes steps S101 to S102, wherein:

[0068] S101 . In a normal working state, controlling the relay included in the switching control module to close, so as to trigger the cell sampling and balancing module to perform sampling and passive balancing on each cell.

[0069] S102 , monitoring the cell voltage sampled by the cell sampling and balancing module in real time, and controlling the relay connected to the cell power path corresponding to the cell generating the abnormal voltage to be disconnected when an abnormal cell voltage is detected.

[0070] The embodiment of the present disclosure provides a cell control and protection method, which is applied to the logic control module in the cell control and protection system. The cell control and protection system also includes the switching control module and the cell sampling and balancing module. In normal working state, the relay included in the switching control module is controlled to close to trigger the cell sampling and balancing module to sample and passively balance each cell; the cell voltage sampled by the cell sampling and balancing module is monitored in real time, and when the cell voltage is detected to be abnormal, the relay connected to the cell power path corresponding to the abnormal voltage is controlled to disconnect. It can have both controllability, scalability and safety, and improve the application flexibility and safety and reliability of the energy storage system in multiple scenarios.

[0071] Those skilled in the art will understand that in the above-mentioned method of the specific implementation method, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0072] The present disclosure also provides a computer-readable storage medium having a computer program stored thereon. When executed by a processor, the computer program executes the steps of the cell control and protection method described in the above method embodiment. The storage medium may be a volatile or non-volatile computer-readable storage medium.

[0073] The embodiments of the present disclosure also provide a computer program product, which includes computer instructions. When the computer instructions are executed by a processor, the steps of the battery cell control and protection method described in the above method embodiments can be executed. For details, reference can be made to the above method embodiments and will not be elaborated herein.

[0074] Among them, the above computer program product can be specifically implemented in the form of hardware, software, or a combination thereof. In an alternative embodiment, the computer program product is specifically embodied as a computer storage medium. In another alternative embodiment, the computer program product is specifically embodied as a software product, such as a Software Development Kit (SDK), etc.

[0075] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described device can refer to the corresponding process in the foregoing method embodiments and will not be elaborated herein. In several embodiments provided by the present disclosure, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. Also, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces, and the indirect coupling or communication connection of the device or unit can be in an electrical, mechanical, or other form.

[0076] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0077] In addition, in each embodiment of the present disclosure, the functional units can be integrated in one processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0078] When the above-mentioned functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such an understanding, the technical solution of the present disclosure, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0079] Finally, it should be noted that the above-mentioned embodiments are only specific embodiments of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present disclosure can still modify the technical solutions described in the foregoing embodiments or easily conceive of changes, or equivalently replace some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should all be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A battery cell control and protection system, characterized in that, Comprising: A power supply module, a logic control module, a switching control module, and a cell sampling and balancing module; The power supply module is used to convert the main power supply input into multiple output voltages for use by the relay in the logic control module and the switching control module; The logic control module is used to control the closing of the relay connected to the corresponding cell power path of the cell, and when the cell sampling and balancing module detects an abnormal voltage, control the relay connected to the cell power path corresponding to the abnormal voltage to open; The cell sampling and balancing module is used to collect the cell voltages of each cell through multiple sampling channels and perform passive balancing in each sampling channel, and when the abnormal voltage is sampled, feedback the channel address corresponding to the abnormal voltage to the logic control module.

2. The battery cell control and protection system according to claim 1, wherein The logic control module includes a microcontroller unit, at least one decoder, and at least one driver. The microcontroller unit is specifically used for: Outputting a sampling and balancing control signal to the connected decoder through the microcontroller unit; The decoder decodes the sampling and balancing control signal and outputs it to the driver, and the driver drives the relay to close.

3. The cell control and protection system according to claim 2, characterized in that, The microcontroller unit is specifically further used for: When the microcontroller unit detects the abnormal voltage, output a protection control signal carrying the channel address corresponding to the abnormal voltage to the connected decoder; The decoder resolves the channel address into a specific channel selection and sends the specific channel selection to the connected driver; The driver drives the corresponding relay to open according to the specific channel selection.

4. The cell control and protection system according to claim 2, wherein The power supply module is specifically used for: Converting the main power supply input into a first power supply source, and the first power supply source outputs a first voltage for use by the microcontroller unit and a second voltage for use by the decoder; Converting the main power supply input into a second power supply source, and the second power supply source outputs a third voltage for use by the driver and the relay.

5. The cell control and protection system according to claim 4, wherein: The control signal output pin of the microcontroller unit is connected to the signal input pin of the decoder, and the enable output pin of the microcontroller unit is connected to the enable pin of the decoder; The signal output pin of the decoder is connected to the signal input pin of the driver; Each signal output pin of the driver is respectively connected to one end of the relay coil in the corresponding relay, and the other end of the relay coil is connected to the third voltage.

6. The cell control and protection system according to claim 1, wherein The cell sampling and balancing module includes an AFE chip and a passive balancing circuit; The AFE chip has multiple sampling channels, and each sampling channel is correspondingly used for sampling one cell; The passive balancing circuit is arranged between two adjacent sampling channels.

7. The cell control and protection system according to claim 1, wherein: For a cascaded energy storage system, the relay is arranged on the positive main power path or the negative main power path of the battery output.

8. A method for controlling and protecting an electric core, characterized in that The logic control module applied to the cell control and protection system as described in any one of claims 1-7, the cell control and protection system further includes the switching control module and the cell sampling and equalization module, and the method includes: In the normal working state, control the relay included in the switching control module to close, so as to trigger the cell sampling and equalization module to sample and passively equalize each cell; Real-time monitor the cell voltage sampled by the cell sampling and equalization module, and when the cell voltage is detected to be abnormal, control the relay connected to the cell power path corresponding to the abnormal voltage to disconnect.

9. An electronic device, characterized in that, Including: A processor, a memory and a bus, the memory stores machine-readable instructions executable by the processor, when the electronic device runs, the processor communicates with the memory through the bus, and when the machine-readable instructions are executed by the processor, the steps of the cell control protection method as described in claim 8 are executed.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is run by the processor, the steps of the cell control protection method as described in claim 8 are executed.

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