CN110600816B

CN110600816B - Battery management system and battery management method based on wireless communication control

Info

Publication number: CN110600816B
Application number: CN201910715759.0A
Authority: CN
Inventors: 杨乔逸; 陈烨然
Original assignee: Nanjing Sixiang New Energy Technology Co ltd
Current assignee: Nanjing Sixiang New Energy Technology Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2021-03-23
Anticipated expiration: 2039-08-05
Also published as: CN110600816A

Abstract

A battery management system and a battery management method based on wireless communication control are provided, the battery management system comprises: the wireless transmission system comprises a plurality of first battery management modules, a plurality of wireless transmission modules, a second battery management module, a wired transmission module and a control module; a first battery management module acquires the operation parameters of the corresponding single battery; a wireless transmission module wirelessly transmits the operation parameters output by the corresponding first battery management module; the second battery management module receives the multiple paths of operation parameters and calculates the residual capacity value according to the multiple paths of operation parameters; the wired transmission module carries out wired transmission on the residual capacity value; the control module receives the residual capacity value and generates a balance control signal according to the residual capacity value; each first battery management module receives the balance control signal and controls the corresponding single battery to charge or discharge according to the balance control signal; the operation parameters in the embodiment adopt a wireless transmission mode, so that the architecture design of the battery management system is simplified.

Description

Battery management system and battery management method based on wireless communication control

Technical Field

The application belongs to the technical field of battery control, and particularly relates to a battery management system and a battery management method based on wireless communication control.

Background

With the popularization of electronic equipment, the power supply safety of the electronic equipment becomes a key factor influencing the working efficiency of the electronic equipment; in order to keep the normal working state of the electronic equipment, a technician needs to adopt a stable power supply to output electric energy, so that the electronic equipment can access rated electric energy and maintain a rated running state, and the circuit function requirements of the technician are met; when a large number of batteries are used for controlling power supply to the large-scale integrated circuit, a Battery Management System (BMS) becomes a link between the batteries and users; the BMS can synchronously adjust the operating states of a plurality of batteries, and the BMS has been widely used in various industrial products such as electric vehicles, battery cars, robots, unmanned planes, and the like, and plays a very important and irreplaceable role.

However, in order to implement a synchronous control function for multiple power supplies in a BMS in the conventional art, the BMS often adopts a function of multi-path signal wired transmission; this results in the conventional BMS having at least the following problems:

1. the communication architecture is complicated, and the protocol conversion problem exists; in a general-scale battery management system, the number of power supply sources used in an energy storage cabinet and an automobile is large, so that the BMS framework is generally a multi-layer framework, wherein the communication is more cumbersome; the traditional technology totally uses a wired data transmission mode, and the problem of signal protocol conversion is bound to exist.

2. The wiring structure inside the BMS is complicated; in the practical application in-process, especially, it is fairly complicated to walk the line part, because the operational aspect of a plurality of powers is controlled to the BMS, if the quantity of power is more, then lead to a plurality of power connections too much, the inside of BMS is walked line equipment and is too loaded down with trivial details, and the space volume occupies great, increases the inside wiring cost of BMS.

3. The architecture of the BMS is single and inflexible; due to the limitation of the number and installation of the wire harnesses, the BMS can only be applied to the control process of the super-large-scale power supply so as to realize the synchronous control function; if the application object of the BMS has a small amount of power, this will result in low BMS control efficiency and large power input/output loss, resulting in low compatibility.

Disclosure of Invention

In view of this, embodiments of the present application provide a battery management system and a battery management method based on wireless communication control, which aim to solve the problems that an internal communication architecture of a BMS in a conventional technical scheme is complex, a communication information transmission control process is excessively complicated, the complexity of an internal routing structure of the BMS is increased, flexibility is low, and therefore the BMS cannot be universally applied to various scale power supply systems.

A first aspect of an embodiment of the present application provides a battery management system based on wireless communication control, including:

the battery management system comprises a plurality of first battery management modules, a plurality of second battery management modules and a plurality of battery management modules, wherein one first battery management module is connected with a plurality of single batteries and is used for acquiring the operating parameters of the corresponding single batteries;

the wireless transmission modules are connected with the first battery management modules in a one-to-one correspondence mode, and one wireless transmission module is used for wirelessly transmitting the operation parameters output by the corresponding first battery management module;

the second battery management module is connected with the plurality of wireless transmission modules, and is used for receiving the plurality of paths of operation parameters and calculating a residual capacity value according to the plurality of paths of operation parameters;

the wired transmission module is connected with the second battery management module and is used for carrying out wired transmission on the residual capacity value; and

the control module is connected with the wired transmission module and used for receiving the residual capacity value, generating a balance control signal according to the residual capacity value and feeding the balance control signal back to the first battery management module sequentially through the wired transmission module, the second battery management module and the wireless transmission module;

each first battery management module is further configured to control the corresponding single battery to charge or discharge according to the balancing control signal.

In one embodiment, the operating parameters of the single battery include: at least any one of an operating voltage, an operating current, and a temperature.

In one embodiment, each of the first battery management modules includes:

the battery management system comprises at least two first battery management units, one first battery management unit is connected with at least two single batteries, and the other first battery management unit is used for acquiring the operating parameters of the at least two single batteries;

the isolation communication unit is connected with at least two first battery management units and is used for carrying out isolation transmission on the multiple paths of operation parameters;

the second battery management unit is connected with the isolation communication unit and the corresponding wireless transmission module and is used for receiving multiple paths of operation parameters and integrating the multiple paths of operation parameters;

each first battery management unit is further configured to receive the balancing control signal, and control the corresponding single battery to charge or discharge according to the balancing control signal.

In one embodiment, each of the first battery management modules further includes:

the temperature detection unit is connected with the first battery management unit and at least four single batteries and is used for detecting the temperatures of the at least four single batteries.

In one embodiment thereof, each of the temperature detection units comprises an NTC temperature probe;

each first battery management unit is realized by adopting a battery management chip with the model number of ISL 78610;

each wireless transmission module is realized by adopting an LTC5800 wireless transmission chip.

In one embodiment, each of the first battery management modules includes:

the third battery management unit is connected with the corresponding wireless transmission module and at least two single batteries and is used for performing AD sampling on the running voltage and the running current of the single batteries and detecting the temperature of the single batteries;

the third battery management unit integrates the at least two paths of operation parameters;

the third battery management unit is further configured to receive the balancing control signal, and control the corresponding single battery to charge or discharge according to the balancing control signal.

In one embodiment, the second battery management module is further configured to detect whether the corresponding single battery is in a fault state according to the operation parameter, and generate an alarm signal if the corresponding single battery is detected to be in the fault state according to the operation parameter;

the battery management system further includes:

the fault alarm branch is connected between the second battery management module and the control module and comprises a dry contact point, and the fault alarm branch is used for uploading the alarm signal to the control module when the dry contact point is conducted;

the control module is used for generating and outputting alarm prompt information according to the alarm signal.

A second aspect of the embodiments of the present application provides a battery management method based on the battery management system as described above, where the battery management method includes:

respectively acquiring the operating parameters of the single batteries by adopting a plurality of first battery management modules;

wirelessly transmitting a plurality of operating parameters to the second battery management module by using a plurality of wireless transmission modules;

calculating to obtain a residual capacity value according to the multiple paths of operation parameters by adopting the second battery management module;

the wired transmission module is adopted to transmit the residual capacity value to the control module in a wired mode;

generating a balance control signal by adopting the control module according to the residual capacity value;

and controlling the single battery to charge or discharge by adopting the first battery management module according to the balance control signal.

In one embodiment, the wirelessly transmitting the multiple operating parameters to the second battery management module by using the multiple wireless transmission modules specifically includes:

and transmitting the plurality of paths of operation parameters to the second battery management module in an SPI communication mode by adopting a plurality of wireless transmission modules.

In one embodiment, after the plurality of wireless transmission modules are used to wirelessly transmit the plurality of operating parameters to the second battery management module, the battery management method further includes:

detecting whether the single battery is in a fault state or not by using the second battery management module according to the multiple operating parameters, and generating an alarm signal if the single battery is judged to be in the fault state by using the second battery management module according to the multiple operating parameters;

conducting a main contact, and transmitting the alarm signal to the control module through a branch where the main contact is located;

and generating and outputting alarm prompt information according to the alarm signal by adopting the control module.

The battery management system based on wireless communication control can acquire the operation parameters of a plurality of single batteries in real time through a plurality of first battery management modules, compatibly output the multi-path operation parameters to a second battery management module in a wireless transmission mode, process and analyze the multi-path operation parameters through the second battery management module, and transmit the residual capacity value to a control module in a wired mode, so that the control module realizes balanced charging and balanced discharging control on the plurality of single batteries according to the residual capacity value to ensure the charging and discharging safety and the internal physical safety of the plurality of single batteries; therefore, the wireless transmission function of the operation parameters can be realized in the battery management system in the embodiment of the application, the internal architecture and the space wiring structure of the system are simplified, the space volume occupied by the battery management system is saved, the internal parameters of the battery management system keep higher transmission efficiency and precision, the battery management system can more accurately perform rated charge control and rated discharge control on a plurality of batteries, and the charge and discharge control safety of a plurality of single batteries is improved; furthermore, the battery management system can be suitable for the balance control process of the single batteries in various fields, the compatibility and the flexibility are high, and the structural design cost and the application cost of the battery management system are reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a battery management system based on wireless communication control according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first battery management module according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a first battery management module according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a first battery management module according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a battery management system based on wireless communication control according to an embodiment of the present application;

fig. 6 is a detailed flowchart of a battery management method according to an embodiment of the present application;

fig. 7 is another specific flowchart of a battery management method according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Referring to fig. 1, a schematic structural diagram of a battery management system 10 based on wireless communication control according to an embodiment of the present application is provided, where the battery management system 10 is connected to a plurality of single batteries (fig. 1 adopts 201, 202, … 20M, where M is a positive integer greater than or equal to 4), and the battery management system 10 can perform charge balancing control and discharge balancing control on the plurality of single batteries to ensure electrical energy storage safety and storage stability of the plurality of single batteries, and the battery management system 10 has a simplified signal transmission step inside, and has very high flexibility; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:

the battery management system 10 includes: the battery management system comprises a plurality of first battery management modules (indicated by 1011, 1012 and … 101N in fig. 1, wherein N is a positive integer greater than or equal to 2), a plurality of wireless transmission modules (indicated by 1021, 1022 and … 102N in fig. 1), a second battery management module 103, a wired transmission module 104 and a control module 105.

The first battery management module is connected with the plurality of single batteries and used for acquiring the operating parameters of the corresponding single batteries.

Optionally, the single battery is an electrochemical battery, the single battery has a function of storing electric quantity, and the single battery can supply power to an external load, so that the external load can realize a normal circuit control function.

Each first battery management module can be in communication interconnection with a plurality of single batteries, and the first battery management modules have the function of information acquisition, so that the running states of the corresponding single batteries can be acquired through the first battery management modules, and the functions of accurately monitoring the charging and discharging states of the single batteries in real time are realized; the self-adaption and high-efficiency power management control of each battery is realized based on the operation parameters of the single batteries, and the information acquisition precision and the charging and discharging control efficiency of a plurality of single batteries are improved.

The plurality of wireless transmission modules are connected with the plurality of first battery management modules in a one-to-one correspondence mode, and one wireless transmission module is used for wirelessly transmitting the operation parameters output by the corresponding first battery management module.

Illustratively, each wireless transmission module can realize wireless transmission functions of 4G or 5G and the like for corresponding operating parameters, and the accuracy and compatibility of the parameters in the transmission process can be maintained through the wireless transmission module.

The wireless transmission module has a signal wireless transmission function, transmission efficiency and transmission precision of the operation parameters are guaranteed through the wireless transmission module, so that the operation parameters can keep a compatible transmission function of signals in various working environments, and the anti-interference performance of communication is high; compare in wired transmission mode, adopt wireless transmission mode to the operating parameter of a plurality of first battery management module outputs, not only be favorable to saving the cost of parameter transmission control, improve battery management system 10's internal communication compatibility and flexibility, carry out wireless compatible transmission to multichannel operating parameter moreover, the inside of having simplified battery management system 10 is walked the line structure, the framework of system is more nimble, can realize more accurate control function to a plurality of batteries according to the operating parameter after the wireless transmission, practical value is higher.

The second battery management module 103 is connected to the plurality of wireless transmission modules, and the second battery management module 103 is configured to receive the multiple operating parameters and calculate a remaining capacity value (SOC) according to the multiple operating parameters.

The method includes the steps that a residual capacity value is used as a characteristic index for measuring the electric energy storage state of a single battery, the value range of the residual capacity value is 0-1, when the residual capacity value is 0, the single battery is completely discharged, and no electric quantity is stored in the single battery; when the residual capacity value is 1, the single battery is fully charged, and the single battery cannot be charged any more; therefore, the present embodiment can accurately determine the actual electric energy storage state of each unit cell according to the remaining capacity value, so as to implement a more accurate charge and discharge control function for the unit cell.

The second battery management module 103 in this embodiment has a centralized control and analysis function of multiple operating parameters, and when the second battery management module 103 receives the multiple operating parameters wirelessly, the second battery management module 103 can realize a function of accurately monitoring the charge and discharge states of the plurality of single batteries, and further the actual charge and discharge requirements of the plurality of single batteries can be obtained more accurately through the residual capacity value output by the second battery management module 103, so as to provide a more reasonable and selectable basis for the charge control process of the plurality of single batteries; the battery management system 10 in the present embodiment therefore has higher accuracy and efficiency of charge and discharge control for a plurality of unit batteries.

The wired transmission module 104 is connected to the second battery management module 103, and the wired transmission module 104 is configured to perform wired transmission on the remaining capacity value.

Optionally, the wired transmission module 104 implements a wired transmission function by using a CAN (Controller Area Network) bus, RS485, RS232, or Modbus (serial communication), and then the wired transmission module 104 implements a more compatible transmission function for the residual capacity value, and CAN maintain a compatible transmission function in each communication environment.

When the second battery management module 103 obtains the remaining capacity value, the wired transmission module 104 can forward and transmit the remaining capacity value in real time, and the wired transmission mode can ensure the anti-interference performance and the power integrity of the remaining capacity value, the remaining capacity value can maintain a compatible and stable transmission function in the battery management system 10, and the precision of signal transmission is high.

The control module 105 is connected with the wired transmission module 104, and the control module 105 is configured to receive the remaining capacity value, generate a balancing control signal according to the remaining capacity value, and feed back the balancing control signal to the first battery management module through the wired transmission module 104, the second battery management module 103, and the wireless transmission module in sequence.

Optionally, the control module 105 is a PLC (Programmable Logic Controller), wherein the control module 105 has functions of Logic operation and centralized control, and obtains equalization control information after processing the remaining capacity value by the control module 105, and the equalization control signal can implement an equalization charge and discharge control function for a plurality of single batteries, so that the control precision is extremely high; therefore, the control module 105 can realize the balanced charging and discharging control function according to the actual electric energy storage state of the single batteries, so that the charging and discharging management precision and efficiency of the battery management system 10 for the plurality of single batteries are guaranteed, and the controllability is strong.

The control module 105 in the present embodiment can accurately acquire the operating state of each battery cell according to the value of the remaining capacity, and implement feedback control for the plurality of first battery management modules, so that the battery management system 10 has better signal transmission stability.

And each first battery management module receives the signals to control the corresponding single battery to charge or discharge according to the balance control signals.

The wired transmission module 104 outputs the equalization control signal to the second battery management module 103, and each wireless transmission module wirelessly transmits the equalization control signal to the corresponding first battery management module; therefore, in this embodiment, a bidirectional signal transmission function can be realized among the internal circuit modules of the battery management system 10, and when the control module 105 obtains the balancing control signal according to the actual electric energy storage state of the single battery, the circuit modules in the battery management system 10 can feed back and output the balancing control signal to the plurality of first battery management modules, so as to realize an adaptive charging and discharging control function for the plurality of single batteries 201.

The first battery management module in this embodiment further has a charge and discharge control function, and when receiving the equalization control signal, the first battery management module can analyze charge and discharge control information in the equalization control signal, and the first battery management module can implement an adaptive charge and discharge control function for the plurality of single batteries according to the equalization control signal, so that the plurality of single batteries implement higher charge and discharge control equalization and high efficiency; the electric energy stored in the single batteries has higher balance and stability, and the working efficiency of the load is guaranteed.

In the structural schematic of the battery management system 10 shown in fig. 1, in combination with a plurality of first battery management modules, the operation parameters of a plurality of single batteries can be accurately collected in real time, and a wireless transmission function of the operation parameters is implemented to ensure the accuracy and stability of charging and discharging control of the plurality of single batteries; because the wireless transmission function of the multiple operating parameters is respectively realized by the multiple wireless transmission modules 102, the transmission steps and the communication flow of the operating parameters are simplified, so that the second battery management module 103 can compatibly receive the operating parameters, and the internal wiring structure of the system is greatly simplified by a wireless transmission mode, the internal architecture of the battery management system 10 has higher compatibility and flexibility, the space volume of the battery management system 10 is saved, and the internal signal transmission cost and the wiring structure manufacturing cost of the battery management system 10 are reduced; after the control module 105 processes and analyzes the residual capacity value, the charging and discharging control states of the plurality of first battery management modules can be controlled in a feedback mode according to the balance control signal, so that the balance charging and discharging control function of the plurality of single batteries is achieved, and the safety and the stability of electric energy storage of the plurality of single batteries are guaranteed; therefore, the battery management system 10 in this embodiment can perform the balanced charge and discharge control on the single batteries according to the actual electric energy storage state of each single battery, thereby preventing the single batteries from being overcharged and overdischarged; in addition, the battery management system 10 in this embodiment can perform adaptive charge and discharge control on various different numbers of single batteries, and implement a wireless transmission function on the operation parameters, so that the battery management system 10 can be applied to various different industrial technical fields, and the electric energy storage safety and the power supply efficiency of a plurality of single batteries are ensured; therefore, the problems that in the traditional technology, the communication processing of the BMS is too complex, the steps of internal signal transmission are complex, the flexibility is poor, the wiring structure in the traditional BMS is complex, self-adaptive balanced charging and discharging control cannot be realized for a plurality of single batteries, and the compatibility is low are effectively solved.

As an alternative embodiment, the operation parameters of the single battery include: any at least one of operating voltage, operating current, and temperature.

The actual electric energy input and output states of the single batteries can be accurately obtained by combining the running current and the running voltage of the single batteries so as to accurately obtain the electric quantity storage states of the single batteries, and the actual physical safety performance of the single batteries can be obtained through the temperature of the single batteries so as to ensure the physical safety performance of the single batteries in the charging and discharging processes; therefore, the operation parameters of the single battery in the embodiment include various operation information, and the function of accurately regulating and controlling the charge and discharge states of the single battery is realized.

As an optional implementation manner, the operation parameters of the single batteries include an operation current and an operation voltage, and thus, the real-time adaptive monitoring of the electric energy storage states of the plurality of single batteries can be performed by each first battery management module.

Referring to fig. 2, fig. 2 shows a schematic structure of first battery management modules provided in the present embodiment, where each first battery management module includes: at least two first battery management units (represented in fig. 2 by 2011, 2012, …, 201P, where P is a positive integer greater than or equal to 2), an isolation communication unit 202, and a second battery management unit 203.

The first battery management unit is connected with the at least two single batteries and used for acquiring the operating parameters of the at least two single batteries.

Optionally, in each first battery management module, at least two single batteries are in a cascade transmission mode, where a first battery management unit is connected to the isolation communication unit 202, and after each first battery management unit performs parameter acquisition on a corresponding single battery, the first battery management unit transmits an operation parameter acquired by the first battery management unit to a previous adjacent first battery management unit, and further transmits multiple operation parameters acquired by all the first battery management units to the isolation communication unit 202 through the first battery management unit, so as to ensure acquisition accuracy and transmission efficiency of the multiple first battery management units.

Illustratively, one first battery management unit is connected with 10 single batteries; each first battery management unit can synchronously acquire the running states of a plurality of single batteries so as to realize the accurate control function of the plurality of single batteries; therefore, the first battery management unit in the embodiment has an accurate parameter acquisition function, and the acquisition precision and efficiency of the operation states of the plurality of single batteries are guaranteed.

The isolation communication unit 202 is connected with at least two first battery management units, and the isolation communication unit 202 is used for carrying out isolation transmission on multiple operating parameters.

The isolation communication unit 202 can realize the isolation transmission function of the operation parameters, that is, the internal signal transmission efficiency and precision of each first battery management module are ensured, and the isolation communication mode can prevent the two circuit modules from interfering with each other; in the embodiment, the isolation communication unit 202 can respectively ensure the independence of the isolation communication unit 202 and the second battery management unit 203 in the communication process, and the first battery management module has higher communication compatibility inside, so that the second battery management unit 203 can more compatibly receive multiple operating parameters.

The second battery management unit 203 is connected to the isolated communication unit 202 and the corresponding wireless transmission module, and the second battery management unit 203 is configured to receive multiple operating parameters and integrate the multiple operating parameters.

The second battery management unit 203 has a parameter fusion function for the multiple operating parameters, and after the multiple operating parameters are integrated through the second battery management unit 203, the corresponding wireless transmission module wirelessly transmits the integrated operating parameters to the second battery management module; in the embodiment, the operation parameters of the single batteries can be collected and transmitted through the first battery management units, so that the phenomenon that the operation parameters are lost in the transmission process can be prevented after the multi-channel parameters are integrated through the second battery management unit 203; each first battery management module realizes higher sampling precision and higher parameter transmission precision for the operation parameters of a plurality of single batteries.

Each first battery management unit receives the equalization control signal and controls the corresponding single battery to be charged or discharged according to the equalization control signal.

Specifically, when the control module 105 acquires actual charge and discharge requirements of the plurality of single batteries according to the residual capacity value and generates a balance control signal, the second battery management unit wirelessly receives the balance control signal in each first battery management module, the isolation communication unit transmits the balance control signal to each first battery management unit in an isolation manner, and the first battery management unit performs balance charge and discharge control on at least two single batteries according to the balance control signal so as to ensure the charge and discharge control safety and efficiency of the plurality of single batteries; therefore, the present embodiment utilizes the charge and discharge control functions of the plurality of first battery management units to realize the adaptive power transmission control function for each single battery; the electric energy storage safety and the balance of the single batteries are further improved, and each first battery management module has higher control flexibility.

As an optional implementation manner, the operation parameters of the single battery include an operation current, an operation voltage and a temperature, and further, the actual operation state of the single battery can be comprehensively monitored through the operation parameters; fig. 3 shows another structural schematic of the first battery management module provided in this embodiment, and compared with the structural schematic of the first battery management module in fig. 2, the first battery management module in fig. 3 further includes: and at least one temperature detection unit (301, 302 and … in fig. 3), wherein the temperature detection unit is connected with the first battery management unit and the at least four single batteries, and is used for detecting the temperatures of the at least four single batteries.

Therefore, the operation parameters of the first battery management unit in this embodiment include: operating current, and temperature; therefore, when the isolation communication unit transmits the multiple operating parameters to the second battery management unit in an isolated manner, the second battery management unit can fuse the operating information of the multiple single batteries in various aspects, so that the battery management system 10 can realize a better charging and discharging control function for the multiple single batteries; the first battery management module in this embodiment can not only collect the electric energy storage states of a plurality of single batteries, but also obtain the internal physical safety states of the single batteries, thereby improving the monitoring accuracy of the battery management system 10 on the single batteries.

As an alternative embodiment, each temperature detection unit includes: an NTC (Negative Temperature CoeffiCient) Temperature probe; the resistance characteristic of the NTC temperature probe has an exponential relationship with the variation of the temperature, so that the NTC temperature probe can sensitively sense the temperatures of the plurality of single batteries to ensure the accuracy and efficiency of temperature detection.

As an alternative embodiment, each first battery management unit is implemented by using a battery management chip with model number ISL 78610.

In the embodiment, the operation parameters of a plurality of single batteries are collected through an ISL78610 battery management chip; for example, the voltage acquisition range is 0-5V, the sampling frequency of each single battery is greater than 1khz, the communication time interval for transmitting the operation parameters to the control module 105 is less than 1 second, and the sampling error is 10 mV; therefore, the first battery management unit in the embodiment has higher acquisition efficiency and acquisition accuracy for the operation states of the plurality of single batteries, and the control sensitivity for the charge and discharge states of the plurality of single batteries is ensured.

As an optional implementation manner, each wireless transmission module is implemented by using a wireless transmission chip with a model number LTC 5800.

In the embodiment, the electric energy sampling function and the charging and discharging control function of the single battery are realized through the battery management chip with the model number of ISL78610, the operation is simple and convenient, and the sensitivity is high; and the wireless transmission function of the multi-channel operation parameters is realized through the LTC5800 wireless transmission chip, the transmission precision and accuracy of the operation parameters are guaranteed, the internal communication framework and the signal transmission steps of the battery management system 10 are simplified, and the wireless transmission module has lower circuit design cost and manufacturing cost.

As an alternative embodiment, the operation parameters of the single battery include: operating voltage, operating current, and temperature; fig. 4 shows another structural schematic diagram of the first battery management modules provided in this embodiment, please refer to fig. 4, each of the first battery management modules includes: the third battery management unit 401 is connected with the corresponding wireless transmission module and at least two single batteries, and the third battery management unit 401 is used for performing AD sampling on the running voltage and the running current of the single batteries and detecting the temperature of the single batteries; the third battery management unit 401 integrates at least two operating parameters.

And the third battery management unit receives the balance control signal and controls the corresponding single battery to be charged or discharged according to the balance control signal.

The temperature, the operating voltage and the operating current of the plurality of single batteries can be directly collected in real time through the third battery management unit 401 in this embodiment, so that the internal circuit module structure of the first battery management module is further simplified, the operation parameter collection steps of the single batteries are reduced, the internal space volume of the battery management system 10 is saved, and the application cost of the third battery management unit 401 is reduced.

Illustratively, the third battery management unit 401 includes a single chip microcomputer control chip, and further the third battery management unit 401 in this embodiment can perform all-around acquisition on the operation parameters of the plurality of single batteries, and can perform balanced charge and discharge control on the plurality of single batteries according to a balanced control signal, so that the control is flexible and simple, and the battery management system 10 has higher compatibility and parameter acquisition stability.

As an alternative implementation, fig. 5 shows another structural schematic of the battery management system 10 provided in this embodiment, and compared with the structural schematic of the battery management system 10 in fig. 1, the battery management system 10 in fig. 5 further includes a fault alarm branch.

The second battery management module 103 detects whether the corresponding single battery is in a fault state according to the operation parameters, and generates an alarm signal if the corresponding single battery is in the fault state according to the operation parameters.

Specifically, when the second battery management module 103 detects that the corresponding single battery is not in a fault state according to the operation parameters, the alarm signal is not generated.

When the second battery management module 103 receives the multiple operating parameters, the second battery management module 103 determines whether the corresponding single battery is in a fault state according to the operating parameters; if the battery is in a fault state, the single battery is in an unsafe electric energy storage state, and at the moment, the fault processing function is realized on the single battery in the fault state through the alarm signal so as to realize the safety control function on the single battery; the plurality of single batteries in the embodiment have higher charge and discharge safety performance.

The fault alarm branch is connected between the second battery management module 103 and the control module 105, the fault alarm branch comprises a dry contact 106, and the fault alarm branch is used for uploading an alarm signal to the control module 105 when the dry contact 106 is conducted; the control module 105 is configured to generate and output an alarm prompt message according to the alarm signal.

It should be noted that the dry contact has two states of on and off, and the dry contact can realize the quick and compatible transmission function of the signal; the connection mode of the dry contact point has diversity, and the compatible regulation and control of the connection state can be realized; therefore, the dry contact point can greatly improve the transmission efficiency of signals and the control response precision.

In the embodiment, the alarm signal is transmitted to the control module 105 in time through the dry contact 106, so as to drive the control module 105 to realize the fault control response function; illustratively, the alarm prompt message is a light signal or an acoustic signal; when the second battery management module 103 detects that the single battery has a fault, the fault information of the single battery is immediately notified to the control module 105, so that the control module 105 sends out audible and visual prompt information, technicians can intuitively know the fault state of the single battery and perform fault removal operation on the single battery, and the physical safety of the single battery is prevented from being damaged due to the fact that the single battery is in the fault state for a long time; therefore, in the present embodiment, the dry contact 106 ensures the response speed of the control module 105 to the fault state of the single battery, and the battery management system 10 can implement the fault detection and fault processing functions for each single battery, thereby ensuring the safe charging and discharging control function for a plurality of single batteries.

As an alternative embodiment, the operating parameters of the cells include the operating current; the second battery management module 103 detects whether the corresponding single battery is in an overcurrent state according to the operation parameters, and generates an overcurrent alarm signal if the corresponding single battery is detected to be in the overcurrent state according to the operation parameters.

Illustratively, when the operating current of the single battery is greater than the preset safe current, the second battery management module determines that the corresponding single battery is in an overcurrent state, and generates an overcurrent alarm signal.

When the running current of the single battery is smaller than or equal to the preset safe current, the second battery management module judges that the corresponding single battery is not in an overcurrent state and does not generate an overcurrent alarm signal.

The fault alarm branch is used for uploading an overcurrent alarm signal to the control module 105; the control module 105 is configured to generate and output an over-current prompt message according to the over-current alarm signal.

Therefore, the embodiment can monitor the over-current state of the single battery in real time through the second battery management module 103, and control and respond to the over-current state through the control module 105, thereby ensuring the safety and reliability of the running current of the single battery.

As an alternative embodiment, the operating parameters of the cells include the operating voltage; the second battery management module 103 detects whether the corresponding single battery is in an overvoltage state according to the operation parameters, and generates an overvoltage alarm signal if the corresponding single battery is detected to be in the overvoltage state according to the operation parameters.

Illustratively, when the operating voltage of the single battery is greater than the preset upper limit voltage, the second battery management module determines that the corresponding single battery is in an overvoltage state, and generates an overvoltage alarm signal.

When the operating voltage of the single battery is less than or equal to the preset upper limit voltage, the second battery management module judges that the corresponding single battery is not in an overvoltage state and does not generate an overvoltage alarm signal.

The fault alarm branch is used for uploading an overvoltage alarm signal to the control module 105; the control module 105 is configured to generate and output an overvoltage prompt message according to the overvoltage alarm signal.

Therefore, the embodiment can monitor the overvoltage state of the single battery in real time through the second battery management module 103, and control and respond to the overvoltage state through the control module 105, thereby ensuring the safety and reliability of the operating voltage of the single battery.

As an alternative embodiment, the operating parameters of the cells include the operating voltage; the second battery management module 103 detects whether the corresponding battery cell is in an under-voltage state according to the operation parameter, and generates an under-voltage alarm signal if the corresponding battery cell is detected to be in the under-voltage state according to the operation parameter.

For example, when the operating voltage of the single battery is less than the preset lower limit voltage, the second battery management module 103 determines that the corresponding single battery is in an under-voltage state, and generates an under-voltage alarm signal.

When the operating voltage of the single battery is greater than or equal to the preset lower limit voltage, the second battery management module 103 determines that the corresponding single battery is not in an undervoltage state, and does not generate an undervoltage alarm signal.

The fault alarm branch is used for uploading the undervoltage alarm signal to the control module 105; the control module 105 is configured to generate and output an under-voltage prompt message according to the under-voltage alarm signal.

Therefore, the embodiment can monitor the under-voltage state of the single battery in real time through the second battery management module 103, and control and respond to the under-voltage state through the control module 105, thereby ensuring the charging and discharging control efficiency and the electric energy storage stability of the single battery.

As an alternative embodiment, the operating parameters of the cells include temperature; the second battery management module 103 detects whether the corresponding single battery is in an over-temperature state according to the operation parameters, and generates an over-temperature alarm signal if the corresponding single battery is detected to be in the over-temperature state according to the operation parameters.

For example, when the temperature of the single battery is greater than the preset safety temperature, the second battery management module 103 determines that the corresponding single battery is in an over-temperature state, and generates an over-temperature alarm signal.

When the temperature of the single battery is less than or equal to the preset safe temperature, the second battery management module 103 determines that the corresponding single battery is not in an over-temperature state, and does not generate an over-temperature alarm signal.

The fault alarm branch is used for uploading an over-temperature alarm signal to the control module 105; the control module 105 is configured to generate and output an over-temperature prompt message according to the over-temperature alarm signal.

Therefore, the over-temperature state of the single battery can be monitored in real time through the second battery management module 103, and the control module 105 can perform timely control response on the over-temperature state, so that the physical safety, the charging and discharging control stability and the reliability of the single battery are guaranteed.

Therefore, in this embodiment, the over-temperature, over-current, over-voltage and under-voltage conditions of the plurality of single batteries are detected by the second battery management module 103, and are reported to the control module 105 in a dry contact manner in time, so as to effectively protect the safety and reliability of the single batteries in the charging and discharging processes; the battery management system 10 has more comprehensive charge and discharge control performance for the single battery.

In summary, the battery management system 10 in this embodiment can implement a wireless transmission function of the operation parameters, simplify the internal wiring structure of the battery management system 10, and reduce the wiring cost; the architecture of the battery management system 10 is simple and flexible; the battery management system 10 in this embodiment has higher transmission efficiency and transmission accuracy for the operation parameters, and avoids control errors for the single batteries; the control module 105 realizes a fault alarm function, and realizes the safety protection function on a plurality of single batteries; therefore, the battery management system 10 in the embodiment is more simplified and concentrated in function, and is suitable for the characteristics of distributed energy storage, the passive equalization function, the voltage acquisition function, the wireless communication function and the like are deeply designed, so that the control and monitoring alarm at the system level is achieved, the cost is low, the overall architecture is simple, the cost performance is high, the space and the design cost can be greatly saved in a wireless transmission mode with the lowest architecture, and the effect of making the best use of things can be achieved; the problem of BMS's intercom framework among the traditional art too complicated, the flexibility is lower effectively solved to BMS's internal wiring is loaded down with trivial details, has promoted BMS's intercom cost and manufacturing cost, can't generally be applicable is solved.

Fig. 6 shows a specific implementation flow of the battery management method provided in this embodiment, where the battery management method is based on the battery management system 10 as described above, and the battery management method can implement accurate charging and discharging control for multiple single batteries, and the control steps are simplified; referring to fig. 6, the battery management method specifically includes the following steps:

step S601: and respectively acquiring the operating parameters of the single batteries by adopting the first battery management modules.

Step S602: and a plurality of wireless transmission modules are adopted to wirelessly transmit the plurality of paths of operation parameters to the second battery management module.

Step S603: and calculating the residual capacity value by adopting a second battery management module according to the multi-path operation parameters.

Step S604: and the wired transmission module is adopted to transmit the residual capacity value to the control module in a wired mode.

Step S605: and generating a balance control signal by adopting a control module according to the residual capacity value.

Step S606: and controlling the single battery to charge or discharge by adopting the first battery management module according to the balance control signal.

As an optional implementation manner, fig. 7 shows another specific implementation flow of the battery management method provided in this embodiment, and compared with the specific implementation flow of the battery management method in fig. 6, in the specific implementation flow of the battery management method shown in fig. 7, after step S602, the battery management method further includes:

step S607: and detecting whether the single battery is in a fault state or not by adopting the second battery management module according to the multi-path operation parameters, and generating an alarm signal if the single battery is judged to be in the fault state by adopting the second battery management module according to the multi-path operation parameters.

Step S608: and conducting the dry contact, and transmitting the alarm signal to the control module through the branch where the dry contact is located.

Step S609: and generating and outputting alarm prompt information by adopting a control module according to the alarm signal.

It should be understood that, the sequence numbers of the steps in the foregoing battery management method embodiment do not imply an order of execution, and the order of execution of the steps should be determined by their functions and inherent logic, and should not limit the implementation process of the embodiment of the present application.

As an optional implementation manner, step S602 specifically includes:

and a plurality of wireless transmission modules are adopted to transmit the multi-path operation parameters to the second battery management module in a Serial Peripheral Interface (SPI) communication mode.

The SPI communication has the characteristics of wireless high-speed transmission and full-duplex support, so that the operation parameters can be transmitted in an SPI communication mode in the embodiment to ensure the transmission efficiency and transmission precision of the operation parameters; on the basis of the operation parameters, a safer charging and discharging control function can be realized for the plurality of single batteries, and the flexibility is higher; and the wiring communication cost of the second battery management module can be simplified through SPI communication, the control reliability of a plurality of single batteries is improved on the basis of guaranteeing the parameter transmission precision, and the battery management method can be suitable for different communication environments.

Optionally, step S604 specifically includes:

and the battery management method is transmitted to the control module in a CAN bus, RS485, RS232 or Modbus mode.

It should be noted that the battery management method in fig. 6 to 7 corresponds to the battery management system in fig. 1 to 5, and therefore, the embodiment of each specific step of the battery management method in fig. 6 to 7 can refer to the embodiment in fig. 1 to 5, and will not be described again here.

In the battery management method provided by this embodiment, after the operation parameters of the plurality of single batteries are accurately collected, the second battery management module can wirelessly receive the operation parameters, so as to implement deep processing and calculation on the operation parameters to obtain the residual capacity value, obtain the actual operation states of the plurality of single batteries according to the residual capacity value, implement a balanced charge and discharge control function on the plurality of single batteries, and ensure the charge and discharge safety of the plurality of single batteries; therefore, the battery management method in the embodiment can realize a wireless transmission function for the operation parameters, improve the flexibility and controllability of parameter communication, reduce the application cost of the battery management method, and achieve the flexible and self-adaptive control function for the single batteries based on the operation state acquisition results of the plurality of single batteries, and the battery management method has a higher application range and practical value; therefore, the problems that the traditional battery management method is high in application cost, low in flexibility and difficult to generally apply due to the fact that the traditional technology is too complicated in battery charging and discharging control steps and inconvenient to operate are effectively solved.

Various embodiments are described herein for various devices, circuits, apparatuses, systems, and/or methods. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.

Reference throughout the specification to "various embodiments," "in an embodiment," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without presuming that such combination is not an illogical or functional limitation. Any directional references (e.g., plus, minus, upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above …, below …, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the embodiments.

Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the disclosure.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A battery management system based on wireless communication control, comprising:

each first battery management module is further used for controlling the corresponding single battery to charge or discharge according to the balance control signal;

each of the first battery management modules includes:

2. The battery management system of claim 1, wherein the operating parameters of the cells comprise: at least any one of an operating voltage, an operating current, and a temperature.

3. The battery management system of claim 2, wherein each of the first battery management modules further comprises:

4. The battery management system of claim 3,

each temperature detection unit comprises an NTC temperature probe;

5. The battery management system of claim 2, wherein each of the first battery management modules comprises:

6. The battery management system according to claim 1, wherein the second battery management module is further configured to detect whether the corresponding single battery is in a fault state according to the operation parameter, and generate an alarm signal if the corresponding single battery is detected to be in the fault state according to the operation parameter;

the battery management system further includes:

7. A battery management method based on the battery management system according to any one of claims 1 to 6, wherein the battery management method comprises:

8. The battery management method according to claim 7, wherein the wireless transmission module is configured to wirelessly transmit the plurality of operating parameters to the second battery management module, specifically:

9. The battery management method of claim 7, wherein after the plurality of wireless transmission modules are used to wirelessly transmit the plurality of operating parameters to the second battery management module, the battery management method further comprises: