Method for controlling power-on and power-off of battery cell control module and digital energy storage system

Abstract

The invention provides a control method for power-on and power-off of a battery cell control module and a digital energy storage system, the method comprises a power-on method and a power-off method of the battery cell control module, and the power-on method of the battery cell control module comprises the following steps: step 1, a host is powered on; step 2, instructing the slave to start up; 3, judging whether a signal that the ith slave is started up is received or not, and if yes, executing the step 4; if not, starting of the system fails; 4, judging whether i is less than N, if not, finishing system startup, if so, making i = i + 1, and returning to the step 3; according to the control method for starting up and shutdown of the battery cell control module and the digital energy storage system, the setting of the method can be optimized, accurate management and control of each battery cell in the battery pack can be realized, the flexibility and the stability of battery cell management and control can be improved, and the safety and the intelligence of battery cell management and control can be enhanced.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology for new energy power systems, and more specifically, to a control method for turning on and off a battery cell control module and a digital energy storage system. Background Technology

[0002] With the continuous expansion of new energy power generation capacity, energy storage systems require an increasing number of cells to be housed in individual battery packs. Therefore, the management and control methods for each individual cell are becoming increasingly important. Adding control modules to each cell for more refined control is becoming a development trend in digital energy storage systems. Currently, cells are encapsulated in a small space, making it impossible to directly add control modules to each cell. Even if control modules are added, effective on / off control of each cell is not possible. Therefore, researching how to add control modules to each cell while simultaneously enabling flexible on / off control of each cell has become a pressing issue in digital energy storage systems.

[0003] Patent CN118157258A discloses a lithium battery system and control method, including the following steps: initially, each battery compartment is in a dormant state, with only the CAN transceiver operating; when the CAN transceiver receives an external wake-up message, the battery management system powers on and performs a self-test, sending battery status information; after the self-test, the battery management system controls the passive dry contact switch to be in the on state, at which point the external charging or load components of the battery compartment are enabled and operate normally. The system also includes the following steps: when the battery management system detects a voltage or temperature fault in a battery compartment, it sends an alarm status via the CAN transceiver, and the external charging or load components receive the signal and operate at reduced power; when the battery management system detects a serious fault in a battery compartment, it controls the passive dry contact switch to be in the off state, thus disconnecting and disabling the enable control of the external charging or load components, stopping operation. This method enables the disconnection of the entire battery compartment, but it does not allow for flexible power on / off control of individual cells within the battery compartment. Summary of the Invention

[0004] In view of this, the present invention aims to propose a control method for turning on and off a battery cell control module and a digital energy storage system, in order to solve the problem that the traditional energy storage devices in the prior art only manage the battery cell module as a whole, resulting in poor precision in battery management; thereby optimizing the method settings, achieving precise management of each battery cell in the battery pack, improving the flexibility and stability of battery cell management, and enhancing the safety and intelligence of battery cell management.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] This invention relates to a control method for powering on and off a battery cell control module and a digital energy storage system. The control method for powering on and off the battery cell control module includes a power-on method and a power-off method. The power-on method for the battery cell control module includes the following steps:

[0007] Step 1: Power on the host and set the number of slave devices to N, where N is a positive integer;

[0008] Step 2, Powering on the slave device: The host pulls the electrical signal of hardware control signal line A high and sends a power-on command to the battery cell control module in the connected slave device; the current slave device number is recorded as i, where i is a positive integer, and i=1 is set;

[0009] Step 3: Determine if the signal indicating that the i-th slave device has completed power-on has been received. If yes, proceed to Step 4; otherwise, the system power-on fails.

[0010] Step 4: Determine if i < N. If no, the system boot is complete. If yes, set i = i + 1 and return to step 3.

[0011] Furthermore, the master unit is the controller inside the battery pack; the different slave units are the cell control modules installed on the corresponding battery cells.

[0012] Furthermore, the host and different slave devices are configured to use a serial connection method.

[0013] Furthermore, the host is connected to the slave device via communication lines and control signal lines respectively.

[0014] Furthermore, in step three, the operations performed by the slave device after receiving the power-on signal include:

[0015] After receiving hardware control signal A from the battery cell control module inside the machine, the MCU is powered on and the MCU power-on self-holding signal C is pulled high; after receiving the communication control command, the power module is powered on and the signal B is pulled high.

[0016] Furthermore, the cell control module includes an MCU and a power module; the MCU has a power-on self-holding signal C and a power supply signal B, and the MCU is connected to the power module.

[0017] Furthermore, step four includes: determining whether i < N; if no, the system power-on is complete; if yes, set i = i + 1; after the current slave module receives the communication control command, it pulls the hardware control signal line A in the next slave module connected to it high and sends a power-on command to the connected slave module; then return to step three.

[0018] Furthermore, the shutdown method for the battery cell control module includes the following steps:

[0019] Step S1: Power on the host;

[0020] Step S2: The host pulls the electrical signal of hardware control signal line A low and sends a broadcast shutdown command;

[0021] Step S3: After receiving the broadcast command, the power module inside the slave device pulls the electrical signal B low, which causes the MCU power-on self-holding signal C to be pulled low.

[0022] Step S4: After the master waits for ts, it sends a shutdown confirmation command and determines whether the master has received a reply from all slaves. If yes, the system shutdown fails; if no reply is received from the cell control module in the slave after ts, the system shutdown succeeds.

[0023] Furthermore, the value of t is 10.

[0024] A digital energy storage system includes a control method for turning a cell control module on and off, the method being applied to the cell control module inside a battery pack included in the system.

[0025] Compared with existing technologies, the control method for powering on and off a battery cell control module and the digital energy storage system described in this invention have the following advantages:

[0026] By setting the above method in the digital energy storage system, the method settings can be optimized, enabling precise control of each cell in the battery pack, improving the flexibility and stability of cell control, and enhancing the safety and intelligence of cell control. Attached Figure Description

[0027] The accompanying drawings, which constitute a part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of the battery cell control module topology.

[0029] Figure 2 This is a schematic diagram of the internal topology of the battery pack;

[0030] Figure 3 This is a flowchart illustrating the power-on process.

[0031] Figure 4 This is a flowchart illustrating the shutdown process. Detailed Implementation

[0032] The inventive concepts of this disclosure will be described below using terminology commonly used by those skilled in the art to communicate the essence of their work to others skilled in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] To address the issue that traditional energy storage devices in existing technologies only manage the entire cell module, resulting in poor precision in battery control, this embodiment proposes a control method for powering on and off a cell control module and a digital energy storage system. The control method for powering on and off the cell control module includes a power-on method and a power-off method. The power-on method for the cell control module includes the following steps:

[0036] Step 1: Power on the host and set the number of slave devices to N, where N is a positive integer;

[0037] Step 2, Powering on the slave device: The host pulls the electrical signal of hardware control signal line A high and sends a power-on command to the battery cell control module in the connected slave device; the current slave device number is recorded as i, where i is a positive integer, and i=1 is set;

[0038] Step 3: Determine if the signal indicating that the i-th slave device has completed power-on has been received. If yes, proceed to step 4; otherwise, the system power-on fails.

[0039] Step 4: Determine if i < N. If no, the system boot is complete. If yes, set i = i + 1 and return to step 3.

[0040] By setting the above methods in the digital energy storage system, the method settings can be optimized to achieve precise control over each cell in the battery pack, improve the flexibility and stability of cell control, and enhance the safety and intelligence of cell control.

[0041] The master unit is the controller within the battery pack. The slave units are cell control modules installed on their respective battery cells. The master unit and the slave units are connected serially. The master unit is connected to the slave units via communication lines and control signal lines. Adjacent slave units are connected via communication lines and control signal lines, respectively. Each cell control module is powered by the corresponding installed battery cell.

[0042] Through the coordinated design of the internal structures of the master and slave units, specifically, the various cell-level control modules are serially connected in a daisy-chain manner. Communication and control signal lines connect the master and slave units, as well as among the slave units themselves. The power supply for each cell-level control module is provided by the individual cells. The module can be powered on or off simultaneously via communication signals and hardware control signals. The cell control module has a power-off retention function; if only one signal triggers a shutdown command, it will have no effect. For the cell control module to power on normally, both the control signal line and the communication power-on signal must be provided simultaneously. For the cell to power off normally, the hardware must disconnect the control signal line, and a shutdown command must be broadcast via communication. Similarly, the cell module's reset function requires a reset command broadcast via communication for the cell to execute the reset action. This method enables flexible, precise, and stable control of the compactly packaged cell-level control modules, paving the way for large-scale cell-level control at the system level.

[0043] In step three, the operations performed by the slave device after receiving the power-on signal include:

[0044] After receiving hardware control signal A from the battery cell control module inside the machine, the MCU is powered on and the MCU power-on self-holding signal C is pulled high; after receiving the communication control command, the power module is powered on and the signal B is pulled high.

[0045] The slave-side battery cell control module includes an MCU and a power module. The MCU has a power-on self-hold signal C and a power-on signal B, and the MCU is connected to the power module.

[0046] By implementing the operations in step three, the corresponding battery cell can be effectively and flexibly powered on, improving the operational stability and reliability of the method. Furthermore, adding a power self-holding signal enhances the stability of the battery cell-level module power supply unit.

[0047] Step four includes: determining whether i < N; if no, the system is powered on; if yes, set i = i + 1; after the current slave module receives the communication control command, it pulls the hardware control signal line A in the next slave module connected to it high and sends a power-on command to the connected slave module; then return to step three.

[0048] By repeating steps three and four, it can be accurately determined that all cell control modules can be powered on normally. Furthermore, by sending a power-on confirmation command from the host until power-on completion signals are received from all slave modules, the entire system is confirmed to be powered on normally, effectively improving the safety and intelligence of the method's operation.

[0049] The shutdown method for the battery cell control module includes the following steps:

[0050] Step S1: Power on the host;

[0051] Step S2: The host pulls the electrical signal of hardware control signal line A low and sends a broadcast shutdown command;

[0052] Step S3: After receiving the broadcast command, the power module inside the slave device pulls the electrical signal B low, which causes the MCU power-on self-holding signal C to be pulled low.

[0053] Step S4: After waiting for ts, the master unit sends a shutdown confirmation command and checks whether it has received responses from all slave units. If yes, the system shutdown fails; otherwise, if the master unit has not received a response from the cell control module within the slave unit after ts, it considers the system to have shut down normally. The system shutdown is successful. Here, t is set to 10.

[0054] Through cell-level control and management methods in digital energy storage systems, more refined system control can be achieved, thereby improving the system's intelligence and stability, and ultimately making the system safer and more reliable. It also enables the control of large-capacity battery cells in digital energy storage systems. Furthermore, the use of both software and hardware signals in the switching methods allows for more flexible and convenient cell control.

[0055] A digital energy storage system includes a control method for turning a cell control module on and off, the method being applied to the cell control module inside a battery pack included in the system.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the power on and off of a battery cell control module, characterized in that, This includes power-on and power-off methods for the battery cell control module. The power-on method for the battery cell control module includes the following steps: Step 1: Power on the host and set the number of slave devices to N, where N is a positive integer; Step 2, Powering on the slave device: The host pulls the electrical signal of hardware control signal line A high and sends a power-on command to the battery cell control module in the connected slave device; the current slave device number is recorded as i, where i is a positive integer, and i=1 is set; Step 3: Determine if the signal indicating that the i-th slave device has completed power-on has been received. If yes, proceed to Step 4; otherwise, the system power-on fails. Step 4: Determine if i < N. If no, the system boot is complete. If yes, set i = i + 1 and return to step 3.

2. The control method for powering on and off a battery cell control module according to claim 1, characterized in that, The master unit is the controller inside the battery pack; the different slave units are the cell control modules installed on the corresponding battery cells.

3. The control method for powering on and off a battery cell control module according to claim 1, characterized in that, The host and different slave devices are configured to be connected in a serial manner.

4. The control method for powering on and off a battery cell control module according to claim 1, characterized in that, The host is connected to the slave via communication lines and control signal lines.

5. The control method for powering on and off a battery cell control module according to claim 1, characterized in that, In step three, the operations performed by the slave device after receiving the power-on signal include: After receiving hardware control signal A from the battery cell control module inside the machine, the MCU is powered on and the MCU power-on self-holding signal C is pulled high; after receiving the communication control command, the power module is powered on and the signal B is pulled high.

6. The control method for powering on and off a battery cell control module according to claim 5, characterized in that, The cell control module includes an MCU and a power module; the MCU has a power-on self-holding signal C and a power supply signal B, and the MCU is connected to the power module.

7. The control method for powering on and off a battery cell control module according to claim 1, characterized in that, Step four includes: determining whether i < N; if no, the system is powered on; if yes, set i = i + 1; after the current slave module receives the communication control command, it pulls the hardware control signal line A in the next slave module connected to it high and sends a power-on command to the connected slave module; then return to step three.

8. The control method for powering on and off a battery cell control module according to claim 1, characterized in that, The shutdown method of the battery cell control module includes the following steps: Step S1: Power on the host; Step S2: The host pulls the electrical signal of hardware control signal line A low and sends a broadcast shutdown command; Step S3: After receiving the broadcast command, the power module inside the slave device pulls the electrical signal B low, which causes the MCU power-on self-holding signal C to be pulled low. Step S4: After the master waits for ts, it sends a shutdown confirmation command and determines whether the master has received a reply from all slaves. If yes, the system shutdown fails; if no reply is received from the cell control module in the slave after ts, the system shutdown succeeds.

9. The control method for powering on and off a battery cell control module according to claim 8, characterized in that, The value of t is 10.

10. A digital energy storage system, characterized in that, The system includes a control method for turning on and off a cell control module according to any one of claims 1-9, wherein the method is applied to the cell control module inside the battery pack included in the system.

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