阅读说明：本技术 一种储能电站电池温度控制系统 (Battery temperature control system of energy storage power station ) 是由 郑春雷 梁安华 于 2021-11-03 设计创作，主要内容包括：一种储能电站电池温度控制系统,属于能源电池技术领域,主要解决电池舱内电池模块之间的温差较大从而影响电池寿命的问题,电池温度控制系统分为两级架构,包括控制单元和管理单元,一个控制单元连接多个管理单元,每个管理单元连接控制若干个风扇,控制单元从电池管理系统处收集电池模组温度,根据有效平均温度M,电池温度变换率Tgr和不同电池组的参考温度X之间的关系,控制各个电池模组内风扇的启停和转速。设置双级架构的温度控制系统,通过动态实时收集的温度,利用控制单元和管理单元双级分析处理,控制系统风扇的启停和各个电池模组内风扇的转速,均衡电池舱内各个电池模组的温差,实现各电池模组之间的温度一致,提高电池寿命。(The utility model provides an energy storage power station battery temperature control system, belong to energy battery technical field, thereby it is great to mainly solve the great problem that influences battery life of the difference in temperature between the battery module in the battery compartment, battery temperature control system divide into the two-stage framework, including the control unit and the administrative unit, a plurality of administrative unit is connected to a control unit, a plurality of fan of every administrative unit connection control, the control unit collects battery module temperature from battery management system department, according to effective average temperature M, relation between the reference temperature X of battery temperature transformation rate Tgr and different group batteries, the opening of fan stops and the rotational speed in each battery module of control. The temperature control system with the double-stage framework is arranged, the temperature is dynamically collected in real time, the control unit and the management unit are used for double-stage analysis and processing, the starting and stopping of the system fan and the rotating speed of the fan in each battery module are controlled, the temperature difference of each battery module in the battery cabin is balanced, the temperature consistency among the battery modules is realized, and the service life of the battery is prolonged.)

1. A battery temperature control system of an energy storage power station is characterized in that the battery temperature control system is divided into a two-stage architecture and comprises a control unit and a management unit, wherein one control unit is connected with a plurality of management units, each management unit is connected with and controls a plurality of fans, the control unit collects the temperature of a battery module from the battery management system, processes the temperature and sends the temperature to the management unit, and the management unit controls the starting, stopping and rotating speed of the fans after analyzing data;

each battery module is internally provided with a plurality of battery temperature data Tn, the control unit acquires the temperature data and then calculates the maximum value Tmax, the minimum value Tmin, the effective average value M after the maximum value Tmax and the minimum value Tmin are removed, and the battery temperature conversion rate Tgr, wherein the battery temperature conversion rate Tgr = T/Tn, T is the conversion amount of the same temperature within 30 seconds,

when M is larger than or equal to 30 ℃ and the number of Tn data in the battery module is larger than 5, the management unit controls the fan to start, and when the temperature in the battery module rises too fast, namely Tgr is larger than or equal to 50%, the management unit controls the fan to increase the rotating speed;

meanwhile, each group in the battery compartment is provided with a plurality of battery modules, the control unit also needs to calculate the effective average value Mn of each battery module after collecting data, calculates the arithmetic average value X of the group as the reference temperature of the group after removing two highest values Mmax1 and Mmax2, the management unit controls the rotating speed of the fan,

when Mn-X is more than or equal to 10 ℃, the rotating speed of the fan is 100 percent of the rated rotating speed, when Mn-X is more than or equal to 7 ℃ and less than 10 ℃, the rotating speed of the fan is 75 to 100 percent of the rated rotating speed, when Mn-X is more than or equal to 5 ℃ and less than 7 ℃, the rotating speed of the fan is 45 to 75 percent of the rated rotating speed, and when Mn-X is less than 5 ℃, the rotating speed of the fan is 20 to 40 percent of the rated rotating speed.

2. The energy storage power station battery temperature control system of claim 1, characterized in that four management units are connected to one control unit, each management unit controls 36 fans, each control unit and four management units form a complete fan control system, and the whole battery temperature control system has a plurality of fan control systems.

3. The system as claimed in claim 1, wherein the control unit comprises a first power module, a first micro control unit, a first display module, a first control module, a first interface module and a first reset module, the first display module, the first control module, the first interface module and the first reset module are arranged on the first micro control unit, the first power module is connected with the first micro control unit and the first display module, the first control module is debugged and controlled through the first display module, the first interface module is provided with two groups, namely a first access module and a first output module, the first access module is connected with the battery management system, and the first output module is connected with the management unit.

4. The energy storage power station battery temperature control system of claim 3, characterized in that the management unit comprises a battery module II, a micro control unit II and a control module II arranged on the micro control unit II, an access module II, an output module II and a reset module II, wherein the battery module II is connected with the micro control unit II, the access module II is connected with the output module I of the control unit, and the output module II is connected with the fan.

5. The energy storage power station battery temperature control system of claim 3, characterized in that the first micro control unit is further provided with an Ethernet interface, and the Ethernet interface is connected with the operation monitoring system to upload the operation state of the fan to the operation monitoring system.

6. The energy storage power station battery temperature control system of any one of claims 3 or 4, characterized in that the access and exit modules of the control and management units are connected using RS-485 bus interfaces.

7. The energy storage power station battery temperature control system of claim 3, characterized in that the display device is a touch display screen, the user can view the running state of the fan controlled by the whole system through the display screen, and can set all the threshold values of the software part through the display screen.

Technical Field

The invention belongs to the technical field of energy batteries, and particularly relates to a battery temperature control system of an energy storage power station.

Background

The current fan of energy storage power station is controlled through battery management system, use the mode of a sword cutting, control all fans and open simultaneously through battery management system in the same cluster and open, the opening of the every battery module of unable accurate control corresponds the electric fan stops, the battery module that leads to high temperature in the battery compartment and the battery module of low temperature are acted on by fan cold wind simultaneously, and can not open and stop of fan on rotational speed and the independent control module according to module temperature intelligent regulation module fan, cause the unable accurate battery module that generates heat that acts on of cold air in the battery compartment, the difference in temperature between the different modules has been led to the battery container and has been lasted great with the cluster, the fan can influence the life-span of battery under the great environment of difference in temperature.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a battery temperature control system of an energy storage power station, which is provided with a control unit and a management unit, and is provided with a unique temperature management control program, so that the temperature of each battery module is consistent with the working temperature, and the rotating speed of fans of different battery modules is controlled according to the temperature, so that the temperature difference among the battery modules is reduced.

A battery temperature control system of an energy storage power station is characterized in that the battery temperature control system is divided into a two-stage architecture and comprises a control unit and a management unit, wherein one control unit is connected with a plurality of management units, each management unit is connected with and controls a plurality of fans, the control unit collects the temperature of a battery module from the battery management system, processes the temperature and sends the temperature to the management unit, and the management unit controls the starting, stopping and rotating speed of the fans after analyzing data;

the battery temperature control method comprises the steps that a plurality of battery temperature data Tn are arranged in each battery module, a control unit collects the temperature data and then calculates the maximum value Tmax and the minimum value Tmin of the internal temperature of the battery module, the effective average value M obtained after the maximum value Tmax and the minimum value Tmin are removed and the battery temperature conversion rate Tgr, wherein the battery temperature conversion rate Tgr = T/Tn, T is the conversion amount of the same temperature within 30 seconds, when the M is larger than or equal to 30 ℃ and the Tn in the battery module is larger than 5, a management unit controls a fan to start, when the internal temperature of the battery module is heated too fast, namely the Tgr is larger than or equal to 50%, the management unit controls the fan to increase the rotating speed;

meanwhile, each group in the battery compartment is provided with a plurality of battery modules, the effective average Mn of each battery module is calculated after data are collected, the two highest values Mmax1 and Mmax2 are removed, and the calculated average X of the group is calculated to be used as the reference temperature of the group, when Mn-X is more than or equal to 10 ℃, the rotating speed of the fan is 100% of the rated rotating speed, when Mn-X is more than or equal to 7 ℃ and less than 10 ℃, the rotating speed of the fan is 75% -100% of the rated rotating speed, when Mn-X is more than or equal to 5 ℃ and less than 7 ℃, the rotating speed of the fan is 45% -75% of the rated rotating speed, and when Mn-X is less than 5 ℃, the rotating speed of the fan is 20% -40% of the rated rotating speed.

Furthermore, the control unit is connected with four management units, each management unit controls 36 fans, each control unit and the four management units form a finished fan control system, and the whole battery temperature control system is provided with a plurality of fan control systems.

The control unit is through handling the temperature data who collects, behind data transmission to the administrative unit after will handling, by the fan of administrative unit control battery module behind the data analysis of transmission, start-stop of administrative unit control fan, set up the fan of a plurality of battery modules of multiunit administrative unit control simultaneously, can adjust the fan rotational speed of each battery module according to the difference in temperature flexibility between the different battery modules, according to the different fan rotational speeds of different temperature control, with this temperature difference between the battery modules of adjusting.

Furthermore, the control unit comprises a first power supply module, a first micro control unit, a first display module, a first control module, a first interface module and a first reset module, wherein the first display module, the first control module, the first interface module and the first reset module are arranged on the first micro control unit, the first power supply module is connected with the first micro control unit and the first display module, the first control module is used for debugging and controlling through the first display module, the two groups of interface modules are respectively an access module I and an output module I, the access module is connected with the battery management system, and the output module I is connected with the management unit.

The control unit is provided with an independent micro control unit for processing data, the interface module receives and outputs data, the display module is matched with the control module for setting a temperature detection program and displaying the running state of a controlled fan, the first power supply module provides running driving electric energy for the display module and the first micro control unit, and the first reset module is used for recovering a running circuit.

Furthermore, the management unit comprises a battery module II, a micro control unit II and a control module II arranged on the micro control unit II, an access module II, a connection module II and a reset module II, wherein the battery module II is connected with the micro control unit II, the access module II is connected with the connection module I of the control unit, and the connection module II is connected with the fan. The management unit is provided with an independent micro control unit II for receiving the data transmitted by the analysis control unit, transmitting a control signal to the control module II and then controlling the operation of the fan through the connecting-out module II, and the resetting module II is used for recovering the operation circuit.

Furthermore, an Ethernet interface is further arranged on the first micro control unit, the first micro control unit is connected with the operation monitoring system through the Ethernet interface, and the operation state of the fan is uploaded to the operation monitoring system. And an Ethernet interface is arranged for uploading the running state of the fan to a running monitoring system, so that centralized management is facilitated.

Furthermore, the interface modules of the control unit and the management unit are connected by using an RS-485 bus interface. Because the RS-485 interface has the advantages of good noise interference resistance, long transmission distance, multi-station capability and the like, the interface module needs to be connected with a plurality of subordinate units, and the RS-485 interface is selected.

Furthermore, the display device is a touch display screen, a user can check the running state of the fan controlled by the whole system through the display screen, and can set all the threshold values of the software part through the display screen.

Compared with the prior art, the beneficial effects of the invention are as follows: setting a temperature control system with a double-stage framework, and controlling the operation of the whole system through double-stage analysis processing of a control unit and a management unit; meanwhile, a plurality of temperature data are collected in each battery module, and after the collected temperature data are analyzed and processed, the start and stop of the fan and the rotating speed of the fan in each battery module are controlled according to the relation between the effective average temperature M, the battery temperature conversion rate Tgr and the reference temperature X of different battery packs, the temperature difference of each battery module in the battery cabin is balanced, the temperature consistency among the battery modules is realized, and the service life of the battery is prolonged; simultaneously, temperature data are real-time collection, and each reference temperature is dynamic real-time calculation and derives, therefore the temperature that detects among the entire system is all more accurate, does not have the delay, and the balanced reference temperature that the calculation was derived is fit for the module more, the temperature of adjustment battery module that can be faster.

Drawings

Fig. 1 is a system complementary diagram of a battery temperature control system of an energy storage power station according to the present invention;

FIG. 2 is a general layout of a control unit according to the present invention;

FIG. 3 is a general layout of a management unit according to the present invention;

FIG. 4 is a software flow diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the technical solutions of the present invention is provided with a specific embodiment in conjunction with the accompanying drawings.

As shown in fig. 1, an energy storage power station battery temperature control system, battery temperature control system divide into two-stage framework, including the control unit and the administrative unit, a control unit is connected with four administrative unit, 36 fans of every administrative unit control, every control unit constitutes a set of complete fan control system with four administrative unit, whole battery temperature control system has a plurality of fan control system, the battery decision of storing according to the energy storage power station, and simultaneously, still be provided with the operation monitoring system at whole battery temperature control system, monitor the fan in the whole system, convenient centralized management.

The control unit collects the temperature of the battery module from the battery management system, processes the temperature and sends the processed temperature to the management unit, and the management unit controls the starting, stopping and rotating speed of the fan after analyzing data; the temperature of the battery module is collected by a battery management system, the battery module is analyzed by the control unit and then sends data to the management unit, and the management unit sends a control command after analyzing the data according to a threshold value set by software.

The data analysis and processing process of the control unit comprises the following steps: the control unit collects the temperature data and then calculates the maximum value Tmax and the minimum value Tmin of the internal temperature of the battery module, the effective average value M after the maximum value Tmax and the minimum value Tmin are removed, and a battery temperature conversion rate Tgr, wherein the battery temperature conversion rate Tgr = T/Tn, T is the conversion amount of the same temperature within 30 seconds,

after the data are sent to the management unit, the management unit analyzes the data processed by the control unit, when the temperature M is more than or equal to 30 ℃ and the number of Tn in the battery module is more than 5, the management unit controls the fan to start, and when the temperature in the battery module rises too fast, namely Tgr is more than or equal to 50%, the management unit controls the fan to increase the rotating speed;

meanwhile, each group in the battery compartment is provided with a plurality of battery modules, in order to ensure that the temperature difference of each battery module of the group is not too large, the effective average value Mn of each battery module is calculated by the control unit after data are collected, the arithmetic average value X of the group is calculated after two highest values Mmax1 and Mmax2 in the group are removed and is used as the reference temperature of the group, and the relation between the rotating speed of the fan and the temperature difference is shown in the following table 1:

table 1: relationship table of fan speed and temperature difference

Further, as shown in fig. 2, the control unit includes a first power module, a first micro control unit, and a first display module, a first control module, an interface module and a first reset module which are disposed on the first micro control unit, the first power module is connected to the first micro control unit and the display module, the first control module is debug-controlled by the display module, the interface modules are provided with two groups, which are respectively a first access module and a first output module, the first access module is connected to the battery management system, and the first output module is connected to the management unit.

The micro control unit processes the data, the interface module receives and outputs the data, the display module is matched with the control module to set a temperature detection threshold and display the running state of the controlled fan, and the first power supply module provides running driving electric energy for the display module and the first micro control unit.

Furthermore, an Ethernet interface is further arranged on the first micro control unit and connected with the operation monitoring system through the Ethernet interface.

Furthermore, the display device is a touch display screen, a user can check the running state of the fan controlled by the whole system through the display screen, and all the threshold values of the software part can be set through the display screen.

Further, as shown in fig. 3, the management unit includes a battery module ii, a micro control unit ii, and a control module ii disposed on the micro control unit ii, the access module ii, the connection module ii, and the reset module ii, the battery module ii is connected to the micro control unit ii, the access module ii is connected to the connection module i of the control unit, and the connection module ii is connected to the fan.

The second micro control unit receives the data transmitted by the analysis control unit, transmits a control signal to the second control module and then controls the operation of the fan through the second connecting-out module, and the second reset module is used for recovering the operation circuit.

In the invention, because one control unit controls four management units and one management unit controls 36 fans, the interface modules of the control unit and the management units are connected by using an RS-485 bus interface, the RS-485 interface has the advantages of good noise interference resistance, long transmission distance, multi-station capability and the like, can meet the requirements of the project,

a micro control unit: the micro control unit of the control unit and the management unit adopts STM32F767IG6, the chip adopts ARM-M7 kernel, and the highest performance theoretical value of M7 kernel: 216MHz, and fully meets the system requirements.

A power supply module: the whole battery temperature control system needs to be externally connected with 220V, a power adapter for converting 220V alternating current into direct current and 10V direct current is adopted, and 10V direct current voltage is connected to a power module in the board. The first power supply module and the second power supply module both adopt an MP2359 chip and an AMS1117-3.3 chip, wherein the former can convert 10V voltage into 5V, and the latter can convert 5V voltage into 3.3V, so as to respectively supply power for the micro control unit, other peripheral circuits, the display device and the like.

An interface module: since the RS-485 level can not be directly connected to the STM32 chip, a level conversion chip is needed, and the interface module of the control unit adopts SP3485 (maximum support 32 devices) level conversion to realize the connection and communication between the management unit and the battery management system; the interface module on the management unit uses SN75LBC184 (maximum support 64 devices) to communicate with the RS-485 connection of the fan.

A reset module: since the chip used by the micro-control unit is low-level reset, the reset circuit is also a low-level reset circuit.

A control module: the module needs to carry one SWD debugging interface, 3 lines (GND, SWDCLK and SWDIO) are needed, and ST LINK is used.

As shown in fig. 4, the working flow of the present invention is: the display screen through the control unit carries out the procedure presetting to the data processing of the control unit and the data processing and the action instruction of the management unit in advance, the procedure is preset and is accomplished the back, battery management system sends the control unit department after collecting the temperature data that is located the battery module in the battery compartment, the control unit carries out analysis processes to the temperature data who collects, data after analysis processes is sent to the management unit again, behind the data that management unit analysis processes received, fan operation and the rotational speed of each battery module in the battery compartment according to the action instruction of presetting, and according to the continuous adjustment of the fan rotational speed of the temperature data of dynamic real-time collection to battery module, shorten the temperature difference between each battery module, improve battery life.

The above-mentioned embodiments are only used for illustrating the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.