Efficient thermal management battery array and energy storage system

Abstract

According to the efficient heat management battery array and the energy storage system, the efficient temperature conduction and exchange heat pipe laths are adopted, and the semiconductor refrigeration module and the electric heating piece are innovatively arranged on the two sides of the heat conduction fin respectively, so that efficient and energy-saving refrigeration and heating and cold and warm bidirectional heat energy rapid exchange are realized; through the designed efficient system architecture and component connection relation, the formed system is simple, convenient and efficient, the operation and maintenance cost and the whole-life investment cost are reduced, the system efficiency and safety are improved, particularly, heat pipe battens are installed on the two sides of a battery pack string formed by connecting batteries in series in a clinging mode, the heat conduction distance is greatly shortened, energy consumption of temperature adjustment is reduced, and the service life of the system is prolonged. Cold and warm two-way heat energy rapid exchange is achieved, and the defects and deficiencies of the technical scheme are overcome; while the heat exchange effect is guaranteed, the heat pipe utilization rate is improved, and the overall investment of a heat management and temperature control system is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery energy storage, and in particular relates to a battery array and energy storage system with high efficiency thermal management. Background Art

[0003] Large-scale battery energy storage systems currently in use generally have hidden safety risks in the operation of the batteries themselves, which are mainly manifested in the defects in the operation control of the consistency and temperature characteristics of the batteries, that is, the consistency of the batteries themselves and the control and the temperature difference during operation increase the inconsistency between batteries, which further challenges the safety of the battery energy storage system. Therefore, it is necessary to effectively improve the thermal management and battery temperature consistency control capabilities to ensure that the battery modules in the battery energy storage system meet the temperature consistency requirements during operation and improve the safety of the battery energy storage system.

[0004] In order to meet the battery temperature consistency requirements during the operation of the battery energy storage system and improve the safety and operating efficiency of the battery energy storage system, the main problems that the industry needs to solve are:

[0005] 1) Efficient thermal management and control of battery module operating temperature to meet the battery operating temperature range requirements and avoid battery damage and failure;

[0007] 2) Control the temperature consistency between batteries in battery strings and battery modules to reduce short-circuit effects and battery damage;

[0008] 3) Improve the temperature control efficiency of thermal management and temperature control systems, simplify the operation mechanism of temperature control systems, reduce the maintenance cost of temperature control systems, and reduce investment in temperature control systems.

[0009] In the research and application of battery energy storage systems, the existing technology has carried out corresponding innovations and practices, and proposed many technical solutions. The use of liquid cooling technology and systematic solution to the temperature control of battery energy storage systems is one of the technical routes. For example, the patent (CN114171822A) published by the State Intellectual Property Office, "Lithium-ion battery energy storage system based on liquid cooling plate heat dissipation", according to the content of its solution, the solution uses a liquid cooling plate installed at the bottom of the battery pack and battery module PACK, and the excess heat generated during battery operation is transferred from the bottom of the battery to the heat dissipation fins, and then the heat dissipation fins are cooled by the liquid cooling plate and the connected liquid cooler to complete the heat dissipation of the battery module. The defects of its solution are very obvious, mainly manifested in:

[0010] 1) The center of heat generated by battery operation is at the upper end of the battery and gradually conducts to the bottom of the battery. This solution installs the heat dissipation fins at the bottom of the battery, which requires heat conduction inside the battery, significantly reducing the timeliness of heat dissipation;

[0011] 2) The use of liquid cooling and liquid cooling pipe pump circulation system facilities reduces the overall reliability and safety of the energy storage system, and increases the difficulty of operation and maintenance and the investment cost of the system throughout its life cycle;

[0012] 3) The battery energy storage system needs to meet the requirements of different temperature ranges for battery stagnation and operation, that is: when the temperature is higher than the required range, efficient cooling is required; when the temperature is lower than the required range, efficient heating is required; when heating is required, this solution can only heat the bottom of the battery, which makes it difficult to achieve the effect of rapid heating of the entire battery. Summary of the invention

[0013] In order to overcome the defects and shortcomings of the existing technical solutions, the present invention adopts heat pipe elements that utilize efficient temperature conduction and exchange, and innovatively installs semiconductor refrigeration modules and electric heating plates on both sides of the heat-conducting fins to achieve efficient refrigeration and heating as well as rapid exchange of cold and warm bidirectional heat energy, designs an efficient system architecture and component connection relationship, and constitutes a simple and efficient system, reduces operation and maintenance costs and full life investment costs, and improves system efficiency and safety. The specific scheme of the present invention is: a battery array and energy storage system with efficient thermal management, which uses heat pipe strips with efficient refrigeration and heating components installed and a battery string connected in series with batteries to form a battery array, and multiple battery arrays are connected in series to a DC bus, and the DC bus is connected to an energy storage inverter through an electric control switch and a protection circuit to form a battery energy storage system. The battery thermal management method is that the battery manager monitors the temperature of the heat-conducting fins through a temperature sensor, and when the heat-conducting fins are higher than the set temperature, the semiconductor refrigeration module is controlled to cool down; when the heat-conducting fins are lower than the set temperature, the electric heating plate is controlled to heat up, forming a battery array and energy storage system with efficient thermal management.

[0014] The battery array and energy storage system with high efficiency thermal management are characterized in that the battery array comprises: heat pipe strips connected to heat conducting fins to form a fast heat conduction component based on heat pipes; temperature sensors are installed on the heat conducting fins to monitor the temperature of the heat conducting fins; semiconductor refrigeration modules and electric heating plates are installed on both sides of the heat conducting fins respectively;

[0015] The invention is also characterized in that the heat pipe strips are installed close to the battery and the two sides of the battery pack in which multiple batteries are connected in series, forming a path for rapid heat exchange between the battery and the heat pipe strips;

[0016] The invention is also characterized in that the battery manager is connected to each battery and the temperature sensor, the cooling power switch and the heating power switch through a communication line, so as to form a control link for temperature monitoring and efficient thermal management.

[0017] The battery array and energy storage system with high efficiency thermal management is characterized in that the semiconductor refrigeration module and electric heating plate installed on both sides of the thermal fin are connected to the cold and hot power supply through the cooling power switch and the heating power switch respectively, forming a power supply path for cooling and heating of the thermal fin.

[0018] The battery array and energy storage system with high efficiency thermal management is characterized in that the battery manager adopts one of an embedded controller, an industrial computer and a PLC controller, presets a control program and based on the temperature data monitored by the temperature sensor, when the temperature is higher than the preset temperature value, starts the semiconductor refrigeration module for cooling and cooling through the refrigeration power switch, and when the temperature is lower than the preset temperature value, starts the electric heating plate for heating and heating through the heating power switch.

[0019] The present invention discloses a battery array and energy storage system with high efficiency thermal management, which adopts heat pipe strips for high efficiency temperature conduction and exchange, and innovatively installs semiconductor refrigeration modules and electric heating plates on both sides of heat-conducting fins, respectively, to achieve high efficiency and energy-saving refrigeration and heating as well as rapid exchange of cold and warm two-way thermal energy. Through the designed high efficiency system architecture and component connection relationship, the system is simple and efficient, operation and maintenance costs and full life cycle investment costs are reduced, and system efficiency and safety are improved. In particular, heat pipe strips are closely installed on both sides of the battery string composed of each battery connected in series, which greatly shortens the heat conduction distance, not only reduces the energy consumption of temperature control, but also realizes rapid exchange of cold and warm two-way thermal energy, and overcomes the defects and shortcomings of the technical solution; while ensuring the heat exchange effect, the utilization rate of the heat pipe is improved, and the overall investment in thermal management and temperature control system is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic block diagram of the principle of a battery array and energy storage system with efficient thermal management.

[0023] Figure 2 It is a schematic block diagram of the battery array principle with efficient thermal management.

[0024] Figure 3 It is a front view schematic diagram of the heat pipe strip.

[0025] Figure 4 It is a top view of the heat pipe strip. DETAILED DESCRIPTION

[0029] As an implementation example, a battery array and energy storage system with high efficiency thermal management are described in conjunction with the accompanying drawings. However, the described embodiment is a partial embodiment of the present invention applied to a battery array and energy storage system with high efficiency thermal management, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; the technology and solutions of the present invention are not limited to the contents given in this implementation example.

[0030] like Figure 1 As shown, a battery array and energy storage system with high efficiency thermal management is provided. A battery array (100) is formed by using a battery string in which a heat pipe strip (5) equipped with high efficiency cooling and heating components is connected in series with a battery (6). A plurality of battery arrays (100) are connected in series to a DC bus (400), and the DC bus (400) is connected to an energy storage inverter through an electric control switch and a protection circuit to form a battery energy storage system. The battery thermal management method is as follows: a battery manager (7) monitors the temperature of a heat conducting fin (1) through a temperature sensor (4). When the temperature of the heat conducting fin (1) is higher than a set temperature, a semiconductor refrigeration module (2) is controlled to cool down; when the temperature of the heat conducting fin (1) is lower than a set temperature, an electric heating plate (3) is controlled to heat up, thereby forming a battery array and energy storage system with high efficiency thermal management.

[0031] like Figure 2 As shown, the battery array and energy storage system with high efficiency thermal management is characterized in that the battery array (100) comprises: a heat pipe strip (5) connected to a heat conducting fin (1) to form a fast heat conduction component based on a heat pipe; a temperature sensor (4) is installed on the heat conducting fin (1) to monitor the temperature of the heat conducting fin (1); a semiconductor refrigeration module (2) and an electric heating plate (3) are installed on both sides of the heat conducting fin (1);

[0015] The invention is also characterized in that the heat pipe strips (5) are installed close to the battery (6) and both sides of a battery pack in which a plurality of batteries are connected in series, forming a path for rapid heat exchange between the battery and the heat pipe strips (5);

[0016] The invention is also characterized in that the battery manager (7) is connected to each battery (6) and the temperature sensor (4), the cooling power switch (20), and the heating power switch (30) through a communication line (8), thereby forming a control link for temperature monitoring and efficient thermal management.

[0032] like Figure 3 and Figure 4 As shown, the battery array and energy storage system with high efficiency thermal management is characterized in that the semiconductor refrigeration module (2) and the electric heating plate (3) installed on both sides of the thermal conductive fin (1) are connected to the cold and hot power supply (10) through the cooling power switch (20) and the heating power switch (30) respectively, forming the power supply path for cooling and heating the thermal conductive fin (1).

[0018] The battery array and energy storage system with high efficiency thermal management is characterized in that the battery manager (7) adopts one of an embedded controller, an industrial computer and a PLC controller, presets a control program and based on the temperature data monitored by the temperature sensor (4), when the temperature is higher than a preset value, starts the semiconductor refrigeration module (2) for cooling and cooling through a refrigeration power switch (20), and when the temperature is lower than a preset value, starts the electric heating plate (3) for heating and raising the temperature through a heating power switch (30).

[0019] The present invention discloses a battery array and energy storage system with high-efficiency thermal management, which adopts heat pipe strips for high-efficiency temperature conduction and exchange, and innovatively installs semiconductor refrigeration modules and electric heating plates on both sides of heat-conducting fins, respectively, to achieve high-efficiency and energy-saving refrigeration and heating as well as rapid exchange of cold and warm two-way thermal energy. The design realizes a high-efficiency system architecture and component connection relationship, and the system is simple and efficient, reduces operation and maintenance costs and full-life investment costs, and improves system efficiency and safety. In particular, heat pipe strips are closely installed on both sides of a battery series string composed of each battery connected in series, which greatly shortens the heat conduction distance, not only reduces the energy consumption of temperature control, but also realizes rapid exchange of cold and warm two-way thermal energy, and overcomes the defects and shortcomings of the technical solution; while ensuring the heat exchange effect, the utilization rate of the heat pipe is improved, and the overall investment in thermal management and temperature control systems is reduced.

[0039] Specific implementation methods are given above, but the present invention is not limited to the described implementation methods. For those skilled in the art, it does not require creative work to design various modified layouts, combinations, formulas, and parameters according to the technical solution of the present invention, and changes, modifications, substitutions, and variations of the implementation methods without departing from the principles and conceptual framework of the present invention still fall within the protection scope of the present invention.

Claims

1. A battery array and energy storage system with efficient thermal management, which uses heat pipe strips with efficient cooling and heating components installed and battery strings connected in series to form a battery array, and multiple battery arrays are connected in series to a DC bus, which is connected to an energy storage inverter through an electronically controlled switch and a protection circuit to form a battery energy storage system. The battery thermal management method is that the battery manager monitors the temperature of the thermal fins through a temperature sensor, and when the thermal fins are higher than the set temperature, controls the semiconductor refrigeration module to cool down; when the thermal fins are lower than the set temperature, controls the electric heating plate to heat up, thereby forming a battery array and energy storage system with efficient thermal management.

2. A battery array and energy storage system with high efficiency thermal management according to claim 1, characterized in that: The battery array includes: heat pipe strips connected to heat conducting fins to form a fast heat conduction component based on heat pipes; temperature sensors are installed on the heat conducting fins to monitor the temperature of the heat conducting fins; semiconductor refrigeration modules and electric heating sheets are installed on both sides of the heat conducting fins; The invention is also characterized in that the heat pipe strips are installed close to the battery and the battery pack with multiple batteries connected in series on both sides, forming a path for rapid heat exchange between the battery and the heat pipe strips; The invention is also characterized in that the battery manager is connected to each battery and the temperature sensor, the cooling power switch and the heating power switch through a communication line, so as to form a control link for temperature monitoring and efficient thermal management.

3. A battery array and energy storage system with high efficiency thermal management according to claim 1, characterized in that The semiconductor refrigeration module and the electric heating plate installed on both sides of the heat-conducting fin are connected to the cold and hot power supplies through the cooling power switch and the heating power switch respectively, forming a power supply path for cooling and heating the heat-conducting fin.

4. A battery array and energy storage system with high efficiency thermal management according to claim 1, characterized in that The battery manager uses one of an embedded controller, an industrial computer and a PLC controller, presets a control program and based on the temperature data monitored by the temperature sensor, when the temperature is higher than the preset temperature value, starts the semiconductor refrigeration module to cool down through the refrigeration power switch, and when the temperature is lower than the preset temperature value, starts the electric heating plate to heat up through the heating power switch.

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