CN-122025920-A - Thermal management control system and energy storage equipment

CN122025920ACN 122025920 ACN122025920 ACN 122025920ACN-122025920-A

Abstract

The application provides a thermal management control system and energy storage equipment, wherein the thermal management control system is used for managing a battery cell module of an energy storage power supply and comprises a temperature monitoring module, a heating module and a controller, the temperature monitoring module comprises a plurality of temperature sensors distributed in different areas of the battery cell module and used for collecting real-time temperature signals of all parts of the battery cell module, the heating module comprises a plurality of independently controllable heating films, the plurality of heating films are laid in the plurality of different areas of the battery cell module, and the controller is coupled to the temperature monitoring module and the heating module and used for dynamically and independently regulating the power applied to all the heating films based on the real-time temperature signals of all the parts of the battery cell module, collected by the plurality of temperature sensors, so that the temperature of all the areas of the battery cell module approaches to a target temperature and the maximum temperature difference converges to be within a first temperature difference threshold. The thermal management control system can improve the temperature uniformity, the charge and discharge efficiency and the use safety of the battery cell module of the energy storage power supply at low temperature.

Inventors

HU SHAOYONG
ZHAO HONGLIANG
LUO FEIYAN
SHEN GAOSONG

Assignees

深圳市华宝新能源股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260126

Claims (15)

1. A thermal management control system for management of a battery cell module of an energy storage power source, comprising: the temperature monitoring module comprises a plurality of temperature sensors distributed in different areas of the battery cell module and is used for acquiring real-time temperature signals of all parts of the battery cell module; The heating module comprises a plurality of independently controllable heating films, and the heating films are coated on a plurality of different areas of the battery cell module; And the controller is coupled to the temperature monitoring module and the heating module and is used for dynamically and independently adjusting the power applied to each heating film based on real-time temperature signals of each part of the cell module acquired by a plurality of temperature sensors so as to enable the temperature of each region of the cell module to approach to the target temperature and enable the maximum temperature difference to be converged within a first temperature difference threshold value.
2. The thermal management control system of claim 1, wherein a plurality of the heating films are disposed on top, bottom, and sidewalls of the cell module; The plurality of temperature sensors are arranged at the top, the bottom and the side walls of the battery cell module.
3. The thermal management control system of claim 1, wherein the controller is periodically operated and is specifically configured to: Acquiring heating power of the current period; Calculating a first temperature difference between the target temperature and a real-time temperature signal acquired by a current temperature sensor in the current period; Calculating the temperature average value of real-time temperature signals acquired by each temperature sensor in the current period; Calculating a second temperature difference between a real-time temperature signal acquired by the current temperature sensor in the current period and the temperature average value; and calculating the heating power of the next period based on the heating power of the current period, the first temperature difference and the second temperature difference, and heating by using a heating film corresponding to the current temperature sensor in the next period based on the calculated heating power.
4. A thermal management control system according to claim 3, wherein the controller is further specifically configured to: Calculating the maximum temperature difference between the maximum value and the minimum value of the real-time temperature signals acquired by each temperature sensor in the current period; and if the maximum value of the real-time temperature signal reaches the target temperature and the maximum temperature difference is smaller than a first temperature difference threshold value, stopping heating by the heating film in the next period.
5. The thermal management control system of claim 3 wherein the controller is further specifically configured to calculate a heating power for a next cycle based on the heating power for the current cycle, the first temperature difference, a first weight corresponding to the first temperature difference, the second temperature difference, a second weight corresponding to the second temperature difference; the method comprises the steps of acquiring a real-time temperature signal in a current period by a current temperature sensor, wherein if the real-time temperature signal acquired by the current temperature sensor in the current period is larger than a first temperature threshold, the first weight is a first basic value, and the second weight is a second basic value, and if the real-time temperature signal acquired by the current temperature sensor in the current period is not larger than the first temperature threshold, the first weight is smaller than the first basic value, and the second weight is larger than the second basic value.
6. The thermal management control system of claim 5, further comprising an ambient temperature sensor for sensing an ambient temperature of the battery cell module; the controller is coupled to the environmental temperature sensor, and is specifically further configured to increase the second weight corresponding to the temperature sensors distributed on the side surface of the battery cell module if the environmental temperature is less than a second temperature threshold, decrease the first weight corresponding to the temperature sensors distributed on the side surface of the battery cell module, and decrease the calculated heating power or stop applying power for the next period for the heating film corresponding to each temperature sensor if the environmental temperature is greater than a third temperature threshold, wherein the third temperature threshold is greater than the second temperature threshold.
7. The thermal management control system of claim 6, wherein the controller is further specifically configured to: Determining the target temperature and heating power change interval based on the ambient temperature and a first curve, wherein the first curve indicates the change relation of the target temperature and the heating power change interval along with the ambient temperature; and correcting the calculated heating power of the next period by using the heating power change interval.
8. A thermal management control system according to claim 3, wherein the controller is further specifically configured to: Based on a real-time temperature signal acquired by the current temperature sensor in the current period and the heating power of the heating film in the current period, predicting the internal temperature of the battery cell module in the next period; And if the fourth temperature difference between the real-time temperature signal of the current period and the internal temperature is greater than a second temperature difference threshold, reducing the calculated heating power of the next period.
9. The thermal management control system of claim 8, wherein the controller is specifically configured to: Acquiring the thermal resistance and the heat capacity of the battery cell module; And predicting the internal temperature of the battery cell module in the next period by using a resistance-capacitance thermal model based on the thermal resistance, the heat capacity, the real-time temperature signal acquired by the current temperature sensor in the current period and the heating power of the heating film in the current period.
10. The thermal management control system of claim 1, further comprising: the heat conduction gasket is arranged between the battery cell module and the heating film and used for heat transfer between the battery cell module and the heating film; the heat preservation layer is arranged outside the heating film and used for preserving heat of the battery cell module.
11. The thermal management control system of claim 10 further comprising a floating thermally conductive sheet floatingly disposed between said thermally conductive gasket and said cell module.
12. The thermal management control system of claim 1, further comprising a current meter and a voltage meter disposed on each of said heating films; the controller is specifically further configured to: Determining a loop power of the heating film based on the loop voltage sensed by the voltmeter and the loop current of the heating film sensed by the ammeter; Based on the real-time temperature signals sensed in each period, determining the temperature rise speed of the corresponding heating film; And if the loop power is larger than the preset loop power or the temperature rise speed is larger than the preset speed, determining that the corresponding heating film is aged.
13. The thermal management control system of claim 1, wherein the controller is further specifically configured to: And if the real-time temperature signal acquired by the temperature sensor is greater than a fourth temperature threshold value, disconnecting a power application loop of the heating film corresponding to the temperature sensor.
14. The thermal management control system of claim 1, further comprising an open circuit sensor disposed at the heating film; the controller is specifically further configured to: and if the open circuit sensor senses that the power application loop of the heating film is open, generating an alarm message.
15. An energy storage device, comprising: An energy storage power supply; the thermal management control system of any one of claims 1-14.

Description

Thermal management control system and energy storage equipment Technical Field The application relates to the technical field of energy storage, in particular to a thermal management control system and energy storage equipment. Background In a low-temperature environment, the electrochemical reaction rate of a cylindrical cell module of the energy storage power supply is obviously reduced, the internal resistance is increased to reduce the charge and discharge efficiency, and potential safety hazards such as lithium precipitation and the like are easily caused. The existing heating scheme aiming at the battery cell module adopts a single-point control mode, adjusts heating power only by depending on the overall average temperature, has the problems of uneven temperature distribution, incapability of responding to real-time temperature difference of each area and poor temperature uniformity, and is difficult to ensure the low-temperature use performance and safety of the battery cell module. Disclosure of Invention The embodiment of the application provides a thermal management control system and energy storage equipment, which aim to improve the temperature uniformity, charge and discharge efficiency and use safety of an energy storage power supply cell module at low temperature. In view of the foregoing, a first aspect of the present application provides a thermal management control system for managing a battery module of an energy storage power source, including: The temperature monitoring module comprises a plurality of temperature sensors distributed in different areas of the battery cell module and is used for acquiring real-time temperature signals of all parts of the battery cell module; The heating module comprises a plurality of independently controllable heating films, and the plurality of heating films are laid in a plurality of different areas of the battery cell module; And the controller is coupled to the temperature monitoring module and the heating module and is used for dynamically and independently adjusting the power applied to each heating film based on the real-time temperature signals of each part of the cell module acquired by the plurality of temperature sensors so as to enable the temperature of each area of the cell module to approach the target temperature and the maximum temperature difference to be converged within a first temperature difference threshold value. In some embodiments of the present application, optionally, a plurality of heating films are disposed on the top, bottom and sidewalls of the battery cell module; the plurality of temperature sensors are arranged at the top, the bottom and each side wall of the battery cell module. In some embodiments of the present application, the controller is optionally periodically operated, and is specifically configured to: Acquiring heating power of the current period; Calculating a first temperature difference between a target temperature and a real-time temperature signal acquired by a current temperature sensor in a current period; calculating the temperature average value of real-time temperature signals acquired by each temperature sensor in the current period; Calculating a second temperature difference between a real-time temperature signal acquired by the current temperature sensor in the current period and a temperature average value; And calculating the heating power of the next period based on the heating power of the current period, the first temperature difference and the second temperature difference, and heating the heating film corresponding to the current temperature sensor in the next period based on the calculated heating power. In some embodiments of the present application, optionally, the controller is specifically further configured to: calculating the maximum temperature difference between the maximum value and the minimum value of the real-time temperature signals acquired by each temperature sensor in the current period; And if the maximum value of the real-time temperature signal reaches the target temperature and the maximum temperature difference is smaller than the first temperature difference threshold value, stopping heating by the heating film in the next period. In some technical schemes of the application, the controller is also used for calculating the heating power of the next period based on the heating power of the current period, the first temperature difference, the first weight corresponding to the first temperature difference, the second temperature difference and the second weight corresponding to the second temperature difference; The method comprises the steps of acquiring a real-time temperature signal in a current period by a current temperature sensor, wherein if the real-time temperature signal acquired in the current period by the current temperature sensor is larger than a first temperature threshold value, the first weight is a first basic value, and the second weight is a seco