Control method and system of battery equipment control system

Abstract

The invention provides a control method and system of a battery equipment control system. Wherein the control system comprises an energy exchanger and an energy control unit, the energy exchanger is connected with the output end of the battery module in series, and the energy exchanger can collect working parameters of the battery module, send the working parameters to the energy control unit and execute an adjusting instruction issued by the energy control unit; and the energy control unit controls bypass or conduction of part of the batteries based on working parameters of the batteries and realizes adjustment of input and output voltages of the batteries. The charging and discharging architecture and the control method of the battery system are improved, optimal control over the batteries is achieved without depending on interaction between base station battery equipment and power grid peak clipping and valley filling, the problems of safety, efficiency and the like caused by inconsistency of the batteries are reduced, and the operation economical efficiency of a communication station is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage control, and in particular to a control method and system for a battery equipment control system. Background Art

[0002] To ensure communication, each communication node is often equipped with a large number of backup batteries. However, under a stable power grid supply system, the utilization rate of communication batteries is extremely low, and they are currently only used as emergency starting power supplies when the city power is cut off. For example, the battery of the communication base station is directly mounted on the DC bus, and the switching power supply adjusts the DC bus voltage to control its charging and discharging state; the batteries in the communication building and data center are used for UPS, and their charging and discharging are controlled by the rectifier when performing AC-DC conversion.

[0003] In order to overcome the impact of battery self-discharge and ensure that the communication node backup power is fully charged, most of the time, the communication battery is in a floating charge state with continuous small current charging. The internal structure of the battery running in the floating charge state for a long time will change, and the imbalance between battery groups will deepen; this single control method ignores the differences between batteries. The different performance of each battery leads to large battery energy consumption during long-term operation, occupying the mains power, wasting resources, etc., and reliability, economy, and safety will all be affected. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a control method and system for a battery equipment control system.

[0005] The present invention provides a control method for a battery equipment control system, wherein the system comprises at least one battery control unit, wherein the battery control unit comprises at least one energy exchanger, wherein the energy exchanger is connected in series with an output end of at least one battery module; wherein the battery control unit further comprises an energy control unit, wherein the energy control unit is in communication connection with the energy exchanger; The method comprises: After the energy exchanger obtains the battery operating parameters of the battery module, it sends them to the energy control unit; The energy control unit controls the target battery module to bypass or conduct through the energy exchanger based on the battery operating parameters sent by the energy exchanger; It also includes that the energy control unit sends a control instruction to the energy exchanger based on the battery operating parameters sent by the energy exchanger or the control instruction sent by the remote platform, and the energy exchanger controls the input and output voltages of the target battery module.

[0006] Optionally, the method further comprises: The energy control unit also communicates with the remote platform, and upon receiving a control instruction sent by the remote platform, sends the control instruction to the energy exchanger to control the input and output voltages of the target battery module; When the energy control unit does not receive the control instructions sent by the remote platform, it calibrates the input and output voltages of the target battery module based on the battery health status SOH data obtained by calculating the battery operating parameters, and sends control instructions to the energy exchanger.

[0007] Optionally, the method further comprises: When receiving the control instruction, the energy exchanger controls the input and output voltages of the target battery module based on the control instruction; When the energy exchanger does not receive the control instruction, the energy exchanger does not correct the input and output voltages of the target battery module.

[0008] Optionally, the method further comprises: The energy control unit obtains the terminal voltage difference and the state of charge SOC difference of the battery module based on the battery operating parameters sent by the energy exchanger, and controls the target battery module to bypass through the energy exchanger after determining that the battery pack balance condition is not met based on the terminal voltage difference or the SOC difference; The battery pack balance condition includes: the terminal voltage difference of multiple battery modules in the same battery control unit does not exceed the set voltage balance interval value, and the SOC difference does not exceed the set SOC balance interval value

[0009] Optionally, the method further comprises: After the energy control unit determines that the battery pack balance condition is not met, the target battery module is controlled to bypass through the energy exchanger while the battery module is in a charging state; the target battery module includes a battery module whose terminal voltage or SOC is higher than a first threshold.

[0010] Optionally, the method further comprises: After the energy control unit determines that the battery pack balance condition is not met, the target battery module is controlled to bypass through the energy exchanger when the battery module is in a discharging state; the target battery module includes a battery module whose terminal voltage or SOC is lower than the second threshold

[0011] Optionally, the method further comprises: After the energy control unit determines that the battery pack balance condition is met, the energy exchanger controls the target battery module that is currently bypassed to be turned on.

[0012] The present invention also provides a control system for a battery device, the system comprising at least one group of battery control units; The battery control unit includes at least one energy exchanger, which is connected in series with the output end of at least one battery module and obtains the battery operating parameters of the battery module; The battery control unit also includes an energy control unit, which is communicatively connected to the energy exchanger and is used to control the bypass or conduction of the target battery module through the energy exchanger based on the battery operating parameters sent by the energy exchanger. It is also used to send control instructions to the energy exchanger based on the battery operating parameters sent by the energy exchanger or the control instructions sent by the remote platform, and the energy exchanger controls the input and output voltages of the target battery module.

[0013] Optionally, the energy exchanger includes a blade-type circuit breaker to control the conduction or bypass of the target battery module; The energy exchanger also includes a DCDC direct current converter for controlling the input and output voltages of the target battery module.

[0014] Optionally, the energy control unit communicates with the energy exchanger, and the energy exchanger communicates with the battery module via RS485 or CAN.

[0015] Optionally, the battery operating parameters include voltage, current and temperature.

[0016] The present invention provides a control method and system for a battery equipment control system. The control system includes an energy exchanger and an energy control unit. The energy exchanger is connected in series with the output end of the battery module, and can collect the working parameters of the battery module, send them to the energy control unit, and execute the adjustment instructions issued by the energy control unit; the energy control unit controls part of the battery to bypass or conduct based on the working parameters of the battery, and adjusts the input and output voltages of the battery. The present invention improves the charging and discharging architecture and control method of the battery system itself, and achieves optimized control of the battery without relying on the interaction between the base station battery equipment and the power grid to shave peaks and fill valleys, reduces safety and efficiency problems caused by inconsistent batteries, and improves the economic efficiency of communication site operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1A schematic diagram of the control system structure of a battery device provided by an embodiment of the present invention.

[0019] Figure 2 A flow chart of a control method provided for an embodiment of the invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] There are few studies on the control of battery equipment for communication in the existing technology. Some have proposed estimating the change of battery capacity based on the monitoring of battery terminal voltage and charge and discharge current, and then combining algorithms to perform peak-shifting and equalized charging of batteries; some have proposed adjusting the load power of the switching power supply and its rectifier module, and replacing the rectifier module in rotation; and some have proposed connecting the power supply equipment to the cloud platform, so that the batteries of the communication site can cooperate with new energy sources such as photovoltaic and wind power, and realize intelligent and integrated management in the cloud.

[0022] In the above research technologies, the method of adding a time-controlled switch on the power supply line side or connecting multiple battery groups to the switching power supply through a battery combiner, and controlling the battery group's overall withdrawal and peak-shifting charging through the switching power supply needs to be combined with the communication site's participation in grid interaction and the grid's peak-shaving and valley-filling policies. It lacks the flexibility of the communication site's main body, and the overall management and control of the battery group is not sophisticated enough; considering the way of coordinated control of the power supply as a whole by the access of new energy, there is a lack of consideration and design of the communication battery itself and its system. In fact, the existing network communication battery equipment is connected to the communication power supply system in the form of series-parallel groups. Whether it is the series-parallel battery group itself or the battery group and the load, there is a lack of devices for equalization between batteries and voltage regulation at the battery output end. During use, as the battery ages and its performance changes, the various parameters of the battery will differ, resulting in a short board effect, affecting the efficiency and economy of the battery system, and even causing safety problems in severe cases.

[0023] From the perspective of battery management, the various embodiments of the present invention use the control architecture of energy storage batteries in communication battery systems, changing the direct hanging architecture of traditional communication batteries. The various embodiments of the present invention take into account the differences in batteries and provide an optimization control system and control method for battery equipment. A modular energy management device is connected to the communication battery equipment, and the device cooperates with the control strategy to perform fine control on the charge and discharge state and input and output voltage of each battery, which can achieve control optimization of communication batteries, efficiently and intelligently manage battery energy consumption, and improve the service life and operating economy of the battery pack.

[0024] Figure 1 A schematic diagram of the control system structure of a battery device provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, in the embodiment of the present invention, a battery control unit is added to the direct hanging structure of a battery device for communication, Figure 1 The system includes two groups of battery control units. Each group of battery control units includes at least one energy exchanger, which is connected in series with the battery output terminal and connected to the PCS or communication DC load from the bus side. The energy exchanger is connected in series with the output terminal of at least one battery module. For example, one energy exchanger can control two battery modules and obtain the battery operating parameters of the battery module.

[0025] Specifically, the energy exchanger has the function of online collection and local storage of battery module charging and discharging current, battery module port voltage, and battery module temperature. The energy exchanger is also used to control the conduction or bypass of the target battery module, as well as the input and output voltages of the target battery module. Its built-in blade-type circuit breaker can control the conduction or bypass of the corresponding target battery module to achieve energy flow distribution, and its built-in DCDC DC converter can control the input and output voltages of the corresponding target battery module. The energy exchanger is equipped with anti-reverse connection function, current limiting and protection circuit, communicates with the energy control unit through CAN or RS485, uploads current, voltage, and temperature information for the energy control unit to make decisions, or receives and executes the decision signal issued by the energy control unit, and realizes the optimized control of the communication battery equipment by the on and off of the blade-type circuit breaker and the voltage regulation of the DCDC DC converter.

[0026] The battery control unit also includes an energy control unit, which is communicatively connected to the energy exchanger and is used to control the bypass or conduction of the target battery module through the energy exchanger based on the battery operating parameters sent by the energy exchanger. The energy control unit is communicatively connected to the energy exchanger via CAN or RS485. For example, one energy control unit can control five energy exchangers, i.e., 10 battery modules. The energy exchanger and the battery module can also communicate via RS485 or CAN.

[0027] The control system of the battery equipment provided by the present invention includes an energy exchanger and an energy control unit. The energy exchanger is connected in series with the output end of the battery module, and can collect the working parameters of the battery module, send them to the energy control unit, and execute the adjustment instructions issued by the energy control unit; the energy control unit controls part of the battery to bypass or conduct based on the working parameters of the battery, and adjusts the input and output voltages of the battery. The present invention improves the charging and discharging architecture and control method of the battery system itself, and achieves optimized control of the battery without relying on the interaction between the base station battery equipment and the power grid to shave peaks and fill valleys, reduces safety and efficiency problems caused by inconsistent batteries, and improves the economic efficiency of communication site operation.

[0028] Furthermore, the energy control unit is also in communication with a remote platform, and is used to send the control instruction to the energy exchanger to control the input and output voltages of the target battery module when receiving the control instruction sent by the remote platform. The energy control unit is also used to calibrate the input and output voltages of the target battery module based on the battery health status SOH data obtained by calculating the battery operating parameters when not receiving the control instruction sent by the remote platform, and send the control instruction to the energy exchanger.

[0029] Specifically, the energy control unit calculates the health status (SOH) and charge status (SOC) of the battery module based on the current, voltage, temperature and other information uploaded by the energy exchanger, thereby identifying the balance of the controlled battery pack and determining whether it is necessary to turn on the battery pack balance; the on-off control of the battery module and the voltage adjustment value are calculated according to the built-in algorithm, and the decision signal (such as control command) is sent to the energy exchanger, and the communication battery equipment is optimized through the on-off of the blade-type circuit breaker built into the energy exchanger and the voltage adjustment of the DCDC DC converter. In addition, if there is a remote platform such as a cloud platform or a dynamic environment system, the energy control unit can upload information to the cloud platform or the dynamic environment system, and receive instructions transmitted from the cloud platform or the dynamic environment system.

[0030] Correspondingly, the energy exchanger is also used to control the input and output voltages of the target battery module based on the control instruction when the control instruction is received; when the control instruction is not received, the energy exchanger does not correct the input and output voltages of the target battery module.

[0031] Furthermore, the energy control unit is specifically used to obtain the terminal voltage difference and the state of charge SOC difference of the battery module based on the battery operating parameters (such as current, voltage, temperature, etc.) sent by the energy exchanger, and after determining that the battery pack balance condition is not met based on the terminal voltage difference or the SOC difference, control the target battery module to bypass through the energy exchanger; wherein the battery pack balance condition includes: the terminal voltage difference of multiple battery modules in the same battery control unit does not exceed the set voltage balance interval value, and the SOC difference does not exceed the set SOC balance interval value.

[0032] Optionally, after determining that the battery pack balance condition is not met, the target battery module is controlled to bypass through the energy exchanger when the battery module is in a charging state; the target battery module includes a battery module whose terminal voltage or SOC is higher than a first threshold. Wherein, the first threshold can be set based on actual conditions, for example, controlling the bypass of a battery module with an SOC higher than 85%. The first threshold can be a fixed value or a dynamically changing value. For example, the first threshold can be determined based on the SOC mean of all battery modules controlled by the energy control unit, and can be determined as the SOC mean, or the SOC mean is increased by 3% as the first threshold. If the terminal voltage is taken as an example, the first threshold can be determined based on the terminal voltage mean of all battery modules controlled by the energy control unit, and can be determined as the terminal voltage mean, or the terminal voltage mean is increased by 100mV as the first threshold.

[0033] And, when the battery module is in a discharging state, the target battery module is controlled to be bypassed through the energy exchanger; the target battery module includes a battery module whose terminal voltage or SOC is lower than a second threshold. Wherein, the second threshold can be set based on actual conditions, for example, a battery module whose SOC is controlled to be lower than 25% is bypassed. The second threshold can be a fixed value or a dynamically changing value. For example, the second threshold can be determined based on the SOC mean of all battery modules controlled by the energy control unit, and can be determined as the SOC mean, or the SOC mean is lowered by 3% as the second threshold. If the terminal voltage is taken as an example, the second threshold can be determined based on the terminal voltage mean of all battery modules controlled by the energy control unit, and can be determined as the terminal voltage mean, or the terminal voltage mean is lowered by 100mV as the second threshold.

[0034] Optionally, the energy control unit is further used to control the target battery module that is currently bypassed to be turned on through the energy exchanger after determining that the battery pack balance condition is met.

[0035] Figure 2 A flow chart of a control method provided by an embodiment of the invention, such as Figure 2 As shown, the control method provided by the embodiment of the present invention can be used as follows Figure 1 In the control system of the battery device shown, the method includes the energy exchanger acquiring the battery operating parameters of the battery module and sending them to the energy control unit, the energy control unit controlling the bypass or conduction of the target battery module through the energy exchanger based on the battery operating parameters sent by the energy exchanger, and the energy control unit sending control instructions to the energy exchanger based on the battery operating parameters sent by the energy exchanger and the control instructions sent by the remote platform, and the energy exchanger controls the input and output voltages of the target battery module.

[0036] In the embodiment of the method of the present invention, the optimization control of the communication battery equipment is mainly realized by the state acquisition of the energy exchanger, the state calculation of the battery by the energy control unit, the voltage adjustment judgment, the balance judgment and the instruction issuance of the energy control unit, the circuit breaker of the energy exchanger and the voltage adjustment. The execution logic is shown as follows Figure 2 .

[0037] S1: The energy exchanger collects the voltage, current, temperature and other status information of the battery module at a set time interval and uploads it to the energy control unit.

[0038] S2: The energy control unit calculates the battery's SOC and SOH: Given the voltage, current, and temperature of the battery, there are multiple methods for calculating the SOC and SOH of the battery. For simplicity in engineering use and in combination with the device architecture proposed in this application, SOH can be calculated by online identification of internal resistance and online correction of capacity, and SOC can be calculated by time integration and OCV-SOC mapping correction. The embodiments of the present invention do not limit the specific SOC and SOH calculation methods.

[0039] S3: Voltage regulation judgment: (1) If there is command control from the cloud platform or the dynamic environment system, the energy control unit sends a voltage adjustment command to the energy exchanger according to the command setting value; if there is no cloud platform command control, the energy control unit calibrates the battery input / output voltage according to the calculated battery SOH data and sends a voltage adjustment command to the energy exchanger.

[0040] (2) If the energy exchanger receives a voltage adjustment instruction from the energy control unit, the process proceeds to step S4; if the energy exchanger does not receive a voltage adjustment instruction from the energy control unit, the process proceeds to step S5.

[0041] S4: The built-in DCDC converter of the energy exchanger is activated to adjust the battery input and output voltages to the set value or calibration value.

[0042] S5: The energy exchanger does not operate, that is, the input and output voltages of the target battery module are not corrected, and the battery is input according to the output bus voltage, or output according to its own terminal voltage.

[0043] S6: Battery balance judgment: (1) The energy control unit calculates the terminal voltage difference and SOC difference of the same group of batteries under its control. The maximum terminal voltage difference of the same group of batteries under the control of an energy control unit shall not exceed the set voltage balancing interval value (generally not more than 100mV), and the maximum SOC difference shall not exceed the set SOC balancing interval value (generally not more than 3%). (2) If the voltage balance and state of charge balance of the battery group meet the requirements, that is, the maximum difference in terminal voltages of the same group of batteries controlled by an energy control unit does not exceed the set voltage balance interval value, and the maximum SOC difference does not exceed the set SOC balance interval value, proceed to step S11; (3) If the battery group voltage balance and state of charge balance do not meet the requirements, that is, the maximum difference in terminal voltages of the same group of batteries controlled by an energy control unit exceeds the set voltage balance interval value, or the maximum SOC difference exceeds the set SOC balance interval value, go to step S7.

[0044] S7: Battery charge and discharge judgment: The energy control unit determines the charge and discharge state of the battery according to the voltage and current information of the battery: if the battery is in the charging state, it proceeds to step S8; if the battery is in the discharging state, it proceeds to step S9.

[0045] S8: Sending charging equalization instructions and equalization adjustment: When the battery pack meets the balanced start-up conditions and is in the charging state, the energy control unit sends a charging balanced instruction to the energy exchanger, and the blade-type circuit breaker built into the energy exchanger is activated to bypass the battery with a high terminal voltage or SOC, charge the low-energy battery first, and stop charging the high-energy battery, so that the charge state of each battery in the battery pack is balanced during the charging process. Enter step S10.

[0046] S9: Discharge balancing instruction issuance and balancing adjustment: When the battery pack meets the balanced start-up conditions and is in the discharge state, the energy control unit sends a discharge balance instruction to the energy exchanger, and the blade-type circuit breaker built into the energy exchanger operates, and selects the number of batteries m to be turned on according to the load needs (assuming that the total number of batteries controlled by an energy control unit is n), turns on m batteries with high terminal voltage or SOC, bypasses nm batteries with low terminal voltage or SOC, discharges high-energy batteries first, and stops discharging low-energy batteries, so that the charge state of each battery in the battery pack is balanced during the discharge process and maintains balanced and consistent output. Enter step S10.

[0047] S10: After setting the time interval, repeat S2 to S9.

[0048] S11: Battery bypass judgment: When the voltage balance and state of charge balance of the battery pack meet the requirements, and the batteries of the same group controlled by an energy control unit are in a highly consistent state, the blade-type circuit breaker built into the energy exchanger should be fully turned on, and all batteries in the battery pack should be charged and discharged at the adjusted set voltage. This step is executed to check whether the blade-type circuit breaker built into the energy exchanger is fully turned on, that is, whether there are batteries that have been bypassed and not reconnected to the circuit during the pre-operation. If there are batteries that are still in the bypass state, go to step S12; if there are no batteries in the bypass state, go to step S10.

[0049] S12: The energy exchanger’s built-in blade circuit breaker operates to reconnect the bypass battery to the circuit.

[0050] The various embodiments of the present invention improve the charging and discharging architecture and control strategy of the communication battery system itself, and achieve optimal control of the battery without relying on the interaction between the base station battery equipment and the power grid to shaving peaks and filling valleys; the various embodiments of the present invention use the energy storage management architecture in the communication backup battery system, which is universal for battery floating charge, equalization charge and discharge scenarios, and can accurately manage each battery module; the battery is selectively charged and discharged according to the voltage balance and the charge state balance, which can reduce the energy consumption of the battery during charging and keep the battery balanced in real time during discharging, thereby improving the safety, economy and service life of the communication battery system.

[0051] The solutions provided by the embodiments of the present invention can be used for battery equipment for communication, and can also be used for large-scale energy storage frequent, deep, and large-capacity charging and discharging scenarios. The present invention is aimed at the backup battery of the communication site, which has an extremely low utilization rate throughout its life cycle and is in a floating charge state for most of the time. There are problems such as occupying the mains and increasing the energy consumption of the site. It can not only manage the energy consumption of the floating charge battery, but also adopt similar logic to balance the battery during discharge, reduce safety and efficiency problems caused by battery inconsistency, and improve the economic efficiency of communication site operation; coupled with the control function of the DCDC DC converter on the battery voltage, it can also make the transformation of the communication site compatible with cascade batteries and old batteries. At the same time, this management method is universal for battery charging and discharging scenarios, and can accurately manage each battery module. Therefore, it can be combined with the operating status of the communication battery, through information management and integrated control, so that the communication battery can be used in peak shaving, demand response, virtual power plant, new energy consumption and other scenarios, reduce the distributed management cost of operators, and have a good market prospect.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a battery equipment control system, characterized in that: The system includes at least one battery control unit, the battery control unit includes at least one energy exchanger, the energy exchanger is connected in series with the output end of at least one battery module; the battery control unit also includes an energy control unit, the energy control unit is in communication with the energy exchanger; The method comprises: After the energy exchanger obtains the battery operating parameters of the battery module, it sends them to the energy control unit; The energy control unit controls the target battery module to bypass or conduct through the energy exchanger based on the battery operating parameters sent by the energy exchanger; It also includes that the energy control unit sends a control instruction to the energy exchanger based on the battery operating parameters sent by the energy exchanger or the control instruction sent by the remote platform, and the energy exchanger controls the input and output voltages of the target battery module.

2. The control method of the battery equipment control system according to claim 1, characterized in that: The method further comprises: The energy control unit also communicates with the remote platform, and upon receiving a control instruction sent by the remote platform, sends the control instruction to the energy exchanger to control the input and output voltages of the target battery module; When the energy control unit does not receive the control instructions sent by the remote platform, it calibrates the input and output voltages of the target battery module based on the battery health status SOH data obtained by calculating the battery operating parameters, and sends control instructions to the energy exchanger.

3. The control method of the battery equipment control system according to claim 1, characterized in that: The method further comprises: When receiving the control instruction, the energy exchanger controls the input and output voltages of the target battery module based on the control instruction; When the energy exchanger does not receive the control instruction, the energy exchanger does not correct the input and output voltages of the target battery module.

4. The control method of the battery equipment control system according to claim 1, characterized in that: The method further comprises: The energy control unit obtains the terminal voltage difference and the state of charge SOC difference of the battery module based on the battery operating parameters sent by the energy exchanger, and controls the target battery module to bypass through the energy exchanger after determining that the battery pack balance condition is not met based on the terminal voltage difference or the SOC difference; The battery pack balancing condition includes: the terminal voltage difference of multiple battery modules in the same battery control unit does not exceed the set voltage balancing interval value, and the SOC difference does not exceed the set SOC balancing interval value.

5. The control method of the battery equipment control system according to claim 4, characterized in that: The method further comprises: After the energy control unit determines that the battery pack balance condition is not met, the target battery module is controlled to bypass through the energy exchanger while the battery module is in a charging state; the target battery module includes a battery module whose terminal voltage or SOC is higher than a first threshold.

6. The control method of the battery equipment control system according to claim 4, characterized in that: The method further comprises: After the energy control unit determines that the battery pack balance condition is not met, when the battery module is in a discharging state, the target battery module is controlled to bypass through the energy exchanger; the target battery module includes a battery module whose terminal voltage or SOC is lower than a second threshold.

7. The control method of the battery equipment control system according to any one of claims 1 to 6, characterized in that: The method further comprises: After the energy control unit determines that the battery pack balance condition is met, the energy exchanger controls the target battery module that is currently bypassed to be turned on.

8. A control system for a battery device, characterized in that: The system includes at least one battery control unit; The battery control unit includes at least one energy exchanger, which is connected in series with the output end of at least one battery module and obtains the battery operating parameters of the battery module; The battery control unit also includes an energy control unit, which is communicatively connected to the energy exchanger and is used to control the bypass or conduction of the target battery module through the energy exchanger based on the battery operating parameters sent by the energy exchanger. It is also used to send control instructions to the energy exchanger based on the battery operating parameters sent by the energy exchanger or the control instructions sent by the remote platform, and the energy exchanger controls the input and output voltages of the target battery module.

9. The control system of the battery device according to claim 8, characterized in that: The energy exchanger includes a blade-type circuit breaker to control the conduction or bypass of the target battery module; The energy exchanger also includes a DCDC direct current converter for controlling the input and output voltages of the target battery module.

10. The control system of the battery equipment according to claim 8 or 9, characterized in that: The energy control unit communicates with the energy exchanger, and the energy exchanger communicates with the battery module via RS485 or CAN.

11. The control system of the battery equipment according to claim 8 or 9, characterized in that: The battery operating parameters include voltage, current and temperature.

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