An energy storage system with joint temperature monitoring function

Abstract

This application discloses an energy storage system with connector temperature monitoring function, comprising: a combiner cabinet, a battery management system, an alarm device, and multiple battery clusters. The combiner cabinet has a main copper busbar, and the battery clusters are connected to cables. A terminal block is provided at the end of each cable away from the battery cluster, and the terminal block is electrically connected to the main copper busbar. A temperature probe is installed on the terminal block. The battery management system and the temperature probes on each cable are connected for data transmission. The alarm device is wired / wirelessly connected to the battery management system. The energy storage system provided by this application can monitor changes in cable connector temperature in real time, promptly detect potential faults, such as providing early warning of cable head overheating accidents caused by poor contact, avoiding potential major losses, and improving the safety and reliability of system operation.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an energy storage system with a joint temperature monitoring function. Background Technology

[0002] With the continuous growth of electricity demand and the large-scale integration of new energy sources, energy storage systems are increasingly widely used in power systems. DC cables, as a key component of new energy electrochemical energy storage systems, directly affect the safety and reliability of the entire system. Among these, the DC cable head, as a crucial part of the cable connection, is subjected to high voltage and high current for extended periods, making it prone to overheating, which can lead to insulation damage or even fire in severe cases.

[0003] During long-term operation, cable heads are prone to overheating due to factors such as contact resistance and insulation aging. Excessive temperature not only accelerates the aging of insulation materials but can also lead to insulation breakdown, causing serious safety accidents. Therefore, real-time monitoring of DC cable head temperature changes is crucial for preventing faults and ensuring the safe operation of the system.

[0004] Traditional temperature monitoring methods mainly rely on manual inspections or simple temperature indicators. These methods suffer from problems such as untimely monitoring and low accuracy, making it difficult to meet the high requirements of safe operation in modern power systems. With the development of sensor and communication technologies, it has become possible to use advanced temperature monitoring systems for real-time monitoring of DC cable heads. By monitoring the cable head temperature in real time, potential faults can be detected promptly, preventative measures can be taken, and the risk of accidents can be effectively reduced. Utility Model Content

[0005] To solve one of the above-mentioned technical problems, this utility model provides an energy storage system with a joint temperature monitoring function.

[0006] The technical solution adopted in this application is as follows:

[0007] An energy storage system with junction temperature monitoring function includes:

[0008] The combiner cabinet has a main copper busbar;

[0009] Multiple battery clusters are provided, each battery cluster is connected to a cable, and a terminal is provided at the end of the cable away from the battery cluster. The terminal is electrically connected to the main copper busbar, and a temperature probe is provided on the terminal.

[0010] A battery management system, wherein the battery management system is connected to the temperature probes on each cable for data transmission;

[0011] An alarm device is provided, which is connected to the battery management system via wired / wireless connection.

[0012] Optionally, the terminal block includes a terminal sleeve and a terminal piece located at the end of the terminal sleeve, the terminal piece being connected to the terminal sleeve;

[0013] The connector is connected to the main copper busbar by fasteners;

[0014] The cable has multiple wires, each of which is inserted into the connector tube. The connector tube is deformed by compression to fix each of the wires.

[0015] The temperature probe is mounted on the junction box.

[0016] Optionally, the temperature probe is disposed on the side of the junction box opposite to the main copper busbar.

[0017] Optionally, the energy storage system with joint temperature monitoring function includes heat shrink tubing;

[0018] The heat shrink tubing is fitted onto the junction box, and the temperature probe is positioned between the heat shrink tubing and the junction box.

[0019] Optionally, the temperature probe is connected to a data cable, which extends out of the heat shrink tubing and connects to the battery management system.

[0020] Optionally, the data cable extends from the heat shrink tubing through a port on the side of the heat shrink tubing closest to the connector.

[0021] Optionally, the energy storage system with junction temperature monitoring function includes a temperature acquisition board;

[0022] The temperature probes on each terminal block are connected to the temperature acquisition board via data cables;

[0023] The temperature acquisition board is electrically connected to the battery management system.

[0024] Optionally, the temperature probe is connected to a wireless module, and the wireless module is wirelessly connected to the battery management system.

[0025] Optionally, the energy storage system with junction temperature monitoring function includes a back-end device connected to the battery management system. The back-end device includes a storage device, a display device, and the alarm device.

[0026] Optionally, the energy storage system with junction temperature monitoring function includes a high-voltage box, which is electrically connected to the battery cluster and the combiner cabinet respectively. A circuit breaker is installed in the combiner cabinet, and a contactor is installed in the high-voltage box. The battery management system is electrically connected to the circuit breaker and the contactor respectively, and is used to control the on / off state of the circuit breaker and the contactor according to the temperature signal input by the temperature probe.

[0027] By adopting the above technical solution, this application has the following beneficial effects:

[0028] The energy storage system provided in this application can monitor the temperature changes of cable joints in real time, and can detect potential faults in a timely manner, such as warning of cable head overheating accidents caused by poor contact, thus avoiding possible major losses and improving the safety and reliability of system operation.

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0031] Figure 1 This is a partial structural schematic diagram of an energy storage system with joint temperature monitoring function provided in an embodiment of this application;

[0032] Figure 2 This application provides an embodiment of the cooperative structure of cables, main copper busbars, and temperature probes in an energy storage system with connector temperature monitoring function.

[0033] Figure 3 This is a schematic diagram of the connection structure of multiple cables and main copper busbars in an energy storage system with connector temperature monitoring function provided in this application embodiment;

[0034] Figure 4 This is a schematic diagram of the connection structure of a single cable and main copper busbar in an energy storage system with connector temperature monitoring function provided in this application embodiment.

[0035] In the diagram: 1. Combiner cabinet; 11. Main copper busbar; 2. Cable; 21. Terminal block; 211. Connector tube; 212. Connector piece; 3. Temperature probe; 4. Battery management system; 5. Fastener; 6. Heat shrink tubing; 7. Data cable; 8. Temperature acquisition board; 9. Energy storage PCS.

[0036] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0038] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] like Figures 1 to 4 As shown in the illustration, this application provides an energy storage system with connector temperature monitoring function, including: a combiner cabinet 1, a battery management system 4, an alarm device, and multiple battery clusters. The combiner cabinet 1 has two main copper busbars 11 for connecting the current. Each battery cluster is connected to a cable 2, and a terminal block 21 is provided at the end of the cable 2 away from the battery cluster. The terminal block 21 is electrically connected to the main copper busbar 11, and a temperature probe 3 is provided on the terminal block 21 for monitoring its temperature. The battery management system 4 is data-connected to the temperature probes 3 on each cable 2, and generates corresponding control signals based on the monitored temperature data of the terminal blocks 21, such as controlling the alarm device to sound an alarm or controlling the display screen to display a signal. The alarm device is wired / wirelessly connected to the battery management system 4. The battery management system 4 can be a BMS. The BMS is used for intelligent management and maintenance of each battery cell, monitoring the battery status, preventing overcharging and over-discharging, and extending the battery's lifespan.

[0041] The energy storage system also includes a power conversion system (PCS9). The output of combiner cabinet 1 is connected to the PCS9, which in turn is connected to the power grid. The PCS9 is the core component of the energy storage system, primarily used to control the charging and discharging process of the battery and to achieve bidirectional energy conversion. The battery management system 4 and the PCS9 are communicatively connected, allowing for data exchange between them.

[0042] The energy storage system provided in this application can monitor the temperature change of the cable 2 connector in real time, and can detect potential faults in a timely manner, such as warning of cable head overheating accidents caused by poor contact, thus avoiding possible major losses and improving the safety and reliability of system operation.

[0043] In practical applications, the energy storage system equipped with a DC cable head (terminal 21) and temperature probe 3 exhibits excellent performance. Analysis of long-term operational data allows for accurate understanding of temperature changes in the cable head, enabling timely detection of potential faults. For example, in a case study of a new energy storage power station, the system successfully issued an early warning of a cable head overheating accident caused by poor contact, preventing potentially significant losses.

[0044] The technical solution provided in this application is applied to the field of energy storage technology, effectively overcoming the limitations of traditional temperature monitoring methods. Through theoretical analysis and practical application verification, the feasibility and effectiveness of the method have been proven. The application of this system not only improves the safety and reliability of DC cable operation but also provides new ideas for the intelligent management of energy storage systems.

[0045] The effectiveness of this application through the addition of temperature probe 3 is mainly reflected in the following aspects: First, real-time temperature monitoring greatly improves the timeliness of fault early warning. Second, accurate temperature data provides a reliable basis for assessing the condition of the cable head (terminal 21). Finally, it increases the automation level of the energy storage system and reduces the workload of manual inspection.

[0046] In some possible implementations, the terminal block 21 of this application can be a commercially available bullnose connector. The terminal block 21 includes a terminal sleeve 211 and a terminal piece 212 located at the end of the terminal sleeve 211. The terminal piece 212 is connected to the terminal sleeve 211 and is connected to the main copper busbar 11 by a fastener 5, which can be a bolt. The terminal piece 212 is fixed to the main copper busbar by the bolt, which can ensure good connection stability. The cable 2 usually has multiple wires, each of which is inserted into the terminal sleeve 211. The terminal sleeve 211 is deformed by compression to fix each wire. However, in this connection method, improper compression of the terminal sleeve 211 can lead to unstable connection between the terminal sleeve 211 and the wires, causing the wires to loosen and easily fall off, resulting in poor contact and overheating. Excessive temperature can not only accelerate the aging of the insulation material but may also cause insulation breakdown, leading to serious safety accidents. In this embodiment, a temperature probe 3 is placed on the terminal sleeve 211. The junction box 211 is the location where the heat is directly generated and the temperature is the highest. The junction box 211 provides a large space and is also convenient for the installation of the temperature probe 3.

[0047] In some possible implementations, the temperature probe 3 is disposed on the side of the junction box 211 opposite to the main copper busbar. This facilitates the placement of the temperature probe 3 on the junction box 211 and avoids interference between the temperature probe 3 and the main copper busbar, which could lead to damage to the temperature probe 3.

[0048] In some possible real-time solutions, the energy storage system with connector temperature monitoring function includes a heat shrink tubing 6, which is sleeved on the junction box 211, and the temperature probe 3 is located between the heat shrink tubing 6 and the junction box 211. The heat shrink tubing 6 covers the temperature probe 3 and the junction box 211, serving to fix and protect the temperature probe 3.

[0049] In some possible implementations, the temperature probe 3 is connected to a data cable 7, which extends out of the heat shrink tubing 6 and connects to the battery management system 4. A clearance hole can be provided in the heat shrink tubing 6 to facilitate the extension of the data cable 7.

[0050] In some possible implementation schemes, combined Figure 3 and Figure 4 As shown, the data cable 7 extends from the heat shrink tubing 6 at one end near the connector 212. That is, there is no need to make a separate clearance hole on the heat shrink tubing 6. The data cable 7 extends directly to the end of the heat shrink tubing 6 and extends smoothly out of the heat shrink tubing 6. The absence of a separate clearance hole on the heat shrink tubing 6 is beneficial to the integrity of the heat shrink tubing 6 structure, good structural strength, and high stability.

[0051] In some possible implementations, the energy storage system with connector temperature monitoring function includes a temperature acquisition board 8. Temperature probes 3 on each terminal 21 are connected to the temperature acquisition board 8 via data cables 7. The temperature acquisition board 8 is electrically connected to the battery management system 4. Since there are many cables 2 requiring current collection, and each cable 2 has a temperature sensor at one end, a temperature acquisition board 8 can be used to facilitate wiring and signal transmission. The temperature acquisition board 8 has multiple temperature sensor interfaces, supports simultaneous acquisition of multiple temperature signals, and is suitable for monitoring complex environmental temperatures.

[0052] In some possible implementations, the temperature probe 3 is connected to a wireless module, which is wirelessly connected to the battery management system 4. The wireless module can be a ZigBee module or a LoRa module. Using a wireless module avoids the need for physical wiring harnesses, simplifying wiring arrangement.

[0053] In some possible implementations, the energy storage system with junction temperature monitoring function includes a back-end device connected to the battery management system 4, the back-end device including a storage device, a display device and the alarm device.

[0054] The alarm device can be a speaker or display on a backend device; for example, the display device and the alarm device can be the same, both having the same structure. Alternatively, the display device and the alarm device can have different structures. A storage device can be used to store temperature data.

[0055] The data collected by temperature probe 3 can be transmitted to the battery management system 4 of the energy storage system. A communication point for temperature data transmission can be added to the battery management system 4 for data acquisition and processing. The backend equipment has functions such as real-time data display, historical data storage, and abnormal alarms.

[0056] In some possible implementations, the energy storage system with junction temperature monitoring includes a high-voltage box electrically connected to both the battery cluster and the combiner cabinet 1. The combiner cabinet 1 contains a circuit breaker, and the high-voltage box contains a contactor. The battery management system 4 is electrically connected to both the circuit breaker and the contactor, controlling their operation based on temperature signals input from the temperature probe 3. The battery management system 4 can automatically determine the temperature based on a preset threshold. When an abnormal temperature is detected, it will issue an alarm and take corresponding protective measures, such as reducing overall power, disconnecting the circuit breaker in the combiner cabinet 1, and disconnecting the high-voltage box contactor of the battery system, to prevent DC-side accidents and potential fires in the energy storage system.

[0057] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An energy storage system having a joint temperature monitoring function, characterized by, include: The combiner cabinet has a main copper busbar; Multiple battery clusters are provided, each battery cluster is connected to a cable, and a terminal is provided at the end of the cable away from the battery cluster. The terminal is electrically connected to the main copper busbar, and a temperature probe is provided on the terminal. A battery management system, wherein the battery management system is connected to the temperature probes on each cable for data transmission; An alarm device is provided, which is connected to the battery management system via wired / wireless connection.

2. The energy storage system with joint temperature monitoring function according to claim 1, characterized in that, The terminal block includes a terminal cylinder and a terminal piece located at the end of the terminal cylinder, the terminal piece being connected to the terminal cylinder; The connector is connected to the main copper busbar by fasteners; The cable has multiple wires, each of which is inserted into the connector tube. The connector tube is deformed by compression to fix each of the wires. The temperature probe is mounted on the junction box.

3. The energy storage system with joint temperature monitoring function according to claim 2, characterized in that, The temperature probe is positioned on the side of the junction box opposite to the main copper busbar.

4. The energy storage system with joint temperature monitoring function according to claim 2, characterized in that, Including heat shrink tubing; The heat shrink tubing is fitted onto the junction box, and the temperature probe is positioned between the heat shrink tubing and the junction box.

5. The energy storage system with joint temperature monitoring function according to claim 4, characterized in that, The temperature probe is connected to a data cable, which extends out of the heat shrink tubing and connects to the battery management system.

6. The energy storage system with joint temperature monitoring function according to claim 5, characterized in that, The data cable extends from the heat shrink tubing at one end near the connector.

7. The energy storage system with joint temperature monitoring function according to claim 1, characterized in that, Including temperature acquisition board; The temperature probes on each terminal block are connected to the temperature acquisition board via data cables; The temperature acquisition board is electrically connected to the battery management system.

8. The energy storage system with joint temperature monitoring function according to claim 1, characterized in that, The temperature probe is connected to a wireless module, and the wireless module is wirelessly connected to the battery management system.

9. The energy storage system with joint temperature monitoring function according to any one of claims 1-8, characterized in that, It includes a back-end device, which is connected to the battery management system, and the back-end device includes a storage device, a display device, and an alarm device.

10. The energy storage system with joint temperature monitoring function according to any one of claims 1-8, characterized in that, The system includes a high-voltage box, which is electrically connected to the battery cluster and the combiner cabinet. A circuit breaker is installed in the combiner cabinet, and a contactor is installed in the high-voltage box. The battery management system is electrically connected to the circuit breaker and the contactor, and is used to control the on / off state of the circuit breaker and the contactor based on the temperature signal input from the temperature probe.

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