Direct-current screen power supply equipment capable of working at-40 DEG C

Abstract

The utility model relates to the technical field of energy storage, in particular to direct-current screen power supply equipment capable of working at-40 DEG C. The system adopts a mode of combining a monitoring host and an acquisition module, and mainly comprises a sodium ion battery pack, the acquisition module, a charging and discharging function module, a data processing and logic control module, a power supply module and a direct-current load, the positive electrode of the sodium battery pack belongs to one of Prussian blue, polyanion and layered oxide, and the negative electrode is made of a hard carbon material. According to the system, a sensor network can be formed through a CAN bus in a downward mounting mode, and the functions of real-time acquisition of the running state of the storage battery / pack, automatic balance maintenance and online capacity checking are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a DC panel power supply device that can operate at -40°C. Background Art

[0002] As a core component of a station's DC system, battery packs are essential for the proper operation of the entire system and are directly linked to the quality of the current panel. However, in current practical applications, battery packs are prone to failure, including poor charge and discharge capabilities, short cycle life, and difficulty operating under extreme conditions. Fires and explosions caused by battery packs frequently lead to devastating disasters, resulting in significant manpower and material losses, as well as unforeseen losses. Operations and maintenance personnel are particularly susceptible to secondary injuries during repairs.

[0003] At present, relevant departments have formulated rules and regulations and relevant specifications for battery packs, and have made clear requirements for the safety of battery packs. Therefore, safety factors must be fully considered during the selection and production process of battery packs. In order to fully understand the performance status of the battery, extend the battery operating life and low-temperature resistance, it is necessary to overcome many difficulties to design a battery pack with superior performance to meet the needs of application scenarios. Ultimately, it is of great significance to achieve power grid safety and ensure product quality. Utility Model Content

[0004] The purpose of this utility model is to provide a DC panel power supply device that can operate at -40℃, which can be promoted and applied in the transformation or new construction projects of DC power battery packs in power plants and stations, while improving the power supply reliability of the battery packs and expanding the scope of application, providing technical means to ensure the normal operation of the product under low temperature conditions, and having the following good economic and social benefits.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a DC screen power supply device that can operate at -40°C, including a sodium ion battery pack and a DC load, the sodium ion battery pack is connected to an acquisition module, the acquisition module is connected to a BIMS monitoring host, and the BIMS monitoring host includes a charging and discharging function module, a data processing and logic control module and a power supply module.

[0006] Preferably, the positive electrode material of the sodium ion battery pack is layered oxide, and the negative electrode material is biomass hard carbon.

[0007] Preferably, the acquisition module can enable the system to monitor the voltage of each single battery.

[0008] Preferably, the power module can automatically or manually balance the battery voltage.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] By using sodium-ion battery packs as the power supply equipment for DC panels, the battery packs are low-cost, environmentally friendly, and suitable for large-scale applications. In addition, sodium-ion battery packs have high safety performance and will not catch fire or explode during overcharging, over-discharging, short circuiting, puncture, etc. They also have the advantage of a wide temperature range and still have a good capacity retention rate when tested at -40°C. This provides a technical means to ensure the normal operation of the product under low-temperature conditions and has the following good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is composed of an intelligent online battery monitoring device. DETAILED DESCRIPTION

[0012] See also Figure 1 A DC panel power supply device capable of operating at -40°C includes a sodium ion battery pack and a DC load. The sodium ion battery pack is connected to a data acquisition module, which is connected to a BIMS monitoring host. The BIMS monitoring host includes a charge and discharge function module, a data processing and logic control module, and a power module.

[0013] See also Figure 1 The positive electrode of the sodium battery pack is one of Prussian blue, polyanion, and layered oxide. The negative electrode uses hard carbon material. The PTC heater in the heating module is a positive temperature coefficient thermistor that can quickly and dynamically heat up. The surface of the material is insulated, safe and stable, and can work for a long time.

[0014] See also Figure 1 The positive electrode material of the sodium-ion battery pack is one of Prussian blue, polyanion, and layered oxide, and the negative electrode material is biomass hard carbon. After the battery is assembled, it can operate normally in extreme weather conditions of -40°C.

[0015] See also Figure 1 The acquisition module enables the system to monitor the voltage of each single cell to prevent the single cell voltage from exceeding the limit and determine the voltage balancing logic; detect the charge and discharge current of the single cell, reflect and analyze the relevant curves, and understand the health status of the battery; detect the total voltage of the battery pack to determine whether the system battery is overcharged or over-discharged; detect the battery temperature to reflect the actual changes inside the battery and timely understand and discover the thermal runaway battery; automatically measure the internal resistance of each battery regularly, automatically analyze its change trend, and issue early warnings for deteriorated batteries;

[0016] See also Figure 1 The power module can automatically or manually balance the battery voltage to make it consistent.

[0017] Example 1:

[0018] In a harsh environment of -40℃, the sodium ion batteries are assembled into battery packs and installed in battery boxes. Figure 1 As shown in the figure, the sodium ion battery pack plays a role of power supply in the system. In order to ensure the normal and safe operation of the DC panel, we placed the sodium ion battery pack in a low temperature environment of -40℃ to observe whether the working performance of the sodium ion battery pack changes. The experimental results show that the normal operation of the equipment can still be guaranteed even in a low temperature environment of -40℃. The sodium ion battery pack has no bulging, flatulence, leakage and other phenomena. It has good low temperature resistance and its fast charging and discharging capabilities are not affected. As the power supply equipment of the DC panel, the sodium ion battery pack has high safety, greatly reduces the accident rate, and reduces the burden on subsequent equipment maintenance work.

[0019] Example 2:

[0020] In an environment of -20℃, the sodium ion batteries are assembled into battery packs and installed in battery boxes. Figure 1 As shown in the figure, the sodium ion battery pack plays a role of power supply in the system. In order to ensure the normal and safe operation of the DC panel, we placed the sodium ion battery pack in a low temperature environment of -20℃ to observe whether the working performance of the sodium ion battery pack changes. The experimental results show that the sodium ion battery pack is not affected in the -20℃ environment, and there is no bulging, flatulence, leakage and other phenomena. It still maintains the ability to charge and discharge quickly. As the power supply equipment of the DC panel, the sodium ion battery pack has high safety, greatly reduces the accident rate, and reduces the burden on the subsequent equipment maintenance work.

[0021] Example 3:

[0022] In an environment of 20°C, assemble the sodium ion batteries into a battery pack and install them in a battery box. Figure 1 As shown in the figure, the sodium ion battery pack plays a role of power supply in the system. In order to ensure the normal and safe operation of the DC panel, we placed the sodium ion battery pack in a low temperature environment of 20℃ to observe whether the working performance of the sodium ion battery pack changes. The experimental results show that in an environment of 20℃, the sodium ion battery pack operates within the normal temperature range and exhibits good fast charging and discharging capabilities, long cycle life, high stability and high energy density.

[0023] In summary: This DC panel power supply equipment, which can operate at -40℃, adopts a combination of monitoring host and acquisition module in the system, and forms a sensor network through the CAN bus through the downward installation form (the acquisition module is installed in conjunction with the battery / group), so as to realize real-time acquisition of the battery / group operating status, automatic balancing maintenance and online capacity verification functions.

Claims

1. A DC panel power supply device capable of operating at -40°C, comprising a sodium ion battery pack and a DC load, characterized in that: The sodium ion battery pack is connected to a collection module, which is connected to a BIMS monitoring host. The BIMS monitoring host includes a charge and discharge function module, a data processing and logic control module, and a power supply module.

2. The DC power supply device capable of operating at -40°C according to claim 1, characterized in that: The positive electrode material of the sodium ion battery pack is layered oxide, and the negative electrode material is biomass hard carbon.

3. The DC power supply device capable of operating at -40°C according to claim 1, characterized in that: The acquisition module can enable the system to monitor the voltage of each single battery.

4. The DC power supply device capable of operating at -40°C according to claim 1, characterized in that: The power module can automatically or manually balance the battery voltage.

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