A lead-carbon battery energy storage cabinet

Abstract

This utility model provides a lead-carbon battery energy storage cabinet, relating to the field of battery energy storage technology. It comprises a management compartment and an energy compartment. The management compartment houses an energy management module, and the energy compartment houses an energy storage module. Each energy storage module includes a support frame and individual lead-carbon battery cells. The support frame has limiting areas, and multiple lead-carbon battery cells are placed sideways in their respective limiting areas to form a lead-carbon battery pack. The partitioned installation and sideways placement of the lead-carbon battery cells achieves a reasonable distribution density, avoiding poor heat dissipation due to close contact. Furthermore, it reduces the volume of the energy storage module, improving its compactness and laying the foundation for designing high-voltage energy storage cabinets. In addition, the power distribution structure composed of supercapacitors and energy storage modules provides smooth and stable power to the DC bus, extending the lifespan of the energy storage modules. Therefore, this lead-carbon battery energy storage cabinet has advantages such as compact structure, small footprint, high safety, and long service life.

Description

Technical Field

[0001] This utility model relates to the field of battery energy storage technology, specifically a lead-carbon battery energy storage cabinet. Background Technology

[0002] With the rapid development of new energy storage technology, energy storage systems are playing an increasingly important role in communication base stations and data center industries. In indoor communication base stations, data centers, and other application scenarios, lead-carbon battery energy storage has the following advantages over lithium battery energy storage: Economic advantages: The construction cost of lead-carbon batteries (0.35-1 yuan / Wh) is only 43%-50% of that of lithium-ion batteries, and the production process is compatible with existing lead-acid battery production lines, resulting in significant economies of scale. Its economic advantages in the field of electrochemical energy storage, combined with its 100% recyclability, make it a preferred solution for scenarios such as new energy consumption and grid peak shaving. Safety: Compared to lithium batteries, lead-carbon batteries have no risk of thermal runaway. Data center energy storage systems need to achieve a thermal runaway interruption time of ≥30 minutes. The modular isolation architecture has a fault isolation rate of 99.99%. The safety distance for lead-carbon batteries is only 1 meter (lithium batteries require 3 meters), making them more suitable for indoor deployment. In densely populated places or high-value equipment rooms, lead-carbon batteries are more applicable than lithium batteries.

[0003] Cycle life: Traditional lead-acid batteries have a short lifespan (only 300 cycles) due to sulfation of the negative electrode, while lead-carbon batteries increase the cycle life by 6 times to more than 1600 cycles by inhibiting the growth of lead sulfate crystals through carbon materials. The charging time is shortened to 90 minutes, and the power density reaches 300-400W / kg, which is close to the level of lithium batteries.

[0004] Based on the above analysis, this solution designs a lead-carbon battery energy storage cabinet. Utility Model Content

[0005] The purpose of this utility model is to provide a lead-carbon battery energy storage cabinet with a compact structure, small footprint, and long service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A lead-carbon battery energy storage cabinet includes a cabinet and a door. At least one side of the cabinet has an opening, and the door is located at the opening to close the cabinet. The cabinet contains a management compartment and an energy compartment. The management compartment contains an energy management module, and the energy compartment contains multiple energy storage modules. Each energy storage module includes a support frame and lead-carbon battery cells. The upper surface of the support frame has a limiting area, and multiple lead-carbon battery cells are placed sideways in their respective limiting areas to form a lead-carbon battery pack.

[0007] As a preferred embodiment of this application, the support frame is provided with a fastener for mounting it in the cabinet. The fastener is a threaded hole or a slide rail. When it is a slide rail, a guide rail corresponding to the slide rail is provided at a corresponding position on the side wall of the cabinet.

[0008] As a preferred embodiment of this application, the power management module includes at least a bidirectional DC-DC converter, a supercapacitor, and a switching device. The supercapacitor and the energy storage module are connected to the same DC bus, and the DC bus is connected to the power grid or a load. The bidirectional DC-DC converter is installed between the supercapacitor and the DC bus, and the switching device is installed between the energy storage module and the DC bus.

[0009] As a preferred embodiment of this application, the switching element is a contactor or a circuit breaker.

[0010] As a preferred embodiment of this application, the support frame is provided with a fixing strip, which is arranged along the length of the support frame to bind and reinforce the lead-carbon battery pack.

[0011] As a preferred embodiment of this application, each lead-carbon battery cell constituting the lead-carbon battery pack is equipped with an equalization module, and each lead-carbon battery cell is connected in series via a wiring harness.

[0012] As a preferred embodiment of this application, both the cabinet door and the top of the cabinet are provided with heat dissipation holes.

[0013] As a preferred embodiment of this application, an electrolyte leakage sensor and / or a humidity sensor are arranged at the bottom of the cabinet.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This design proposes a lead-carbon battery energy storage cabinet. The cabinet contains a management compartment and an energy compartment. The management compartment houses an energy management module, while the energy compartment contains an energy storage module. Each energy storage module comprises a support frame and individual lead-carbon battery cells. The support frame is divided into limiting zones by partitions to restrict the movement of the individual lead-carbon battery cells. Multiple individual lead-carbon battery cells are placed sideways in their respective limiting zones to form a lead-carbon battery pack. This partitioned installation and sideways placement of the individual lead-carbon battery cells achieves a reasonable distribution density, preventing poor heat dissipation due to close contact, and also reduces the size of the energy storage module. Improving the compactness of the energy storage module lays the foundation for designing high-voltage energy storage cabinets. Furthermore, this solution utilizes a power distribution structure comprised of supercapacitors and energy storage modules within the power management module to provide a smooth and stable power supply to the DC bus, reducing the impact of high current on the lead-carbon battery. This, in turn, extends the lifespan of the energy storage module and enhances the overall safety of the energy storage cabinet. Therefore, this lead-carbon battery energy storage cabinet offers advantages such as compact structure, small footprint, high safety, and long service life, making it a promising alternative to lithium battery energy storage cabinets with considerable market potential and economic benefits. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the lead-carbon battery energy storage cabinet provided by this utility model.

[0016] Figure 2 This is a schematic diagram showing the disassembled state of the cabinet and energy storage module provided by this utility model.

[0017] Figure 3a This is a schematic diagram of the overall structure of an energy storage module provided by this utility model.

[0018] Figure 3b Provided by this utility model Figure 3a A magnified view of a portion of point A in the middle.

[0019] Figure 4a A schematic diagram of the overall structure of another energy storage module provided by this utility model.

[0020] Figure 4b Provided by this utility model Figure 4a A magnified view of a portion of point B in the middle.

[0021] Figure 5a A schematic diagram of a cabinet door structure provided for this utility model.

[0022] Figure 5b This is a schematic diagram of another cabinet door structure provided by this utility model.

[0023] Figure 6 This is a front view of the internal structure of the cabinet provided by this utility model.

[0024] Figure 7 A structural diagram of the power management module provided by this utility model.

[0025] Figure Labels

[0026] 10 is the cabinet; 11 is the cabinet door; 12 is the heat dissipation hole; 20 is the energy storage module; 21 is the support frame; 22 is the lead-carbon battery cell; 23 is the fixing strip; 24 is the threaded hole; 25 is the slide rail; 26 is the equalization module; 27 is the wiring harness; 28 is the partition block; 30 is the power management module; 31 is the DC bus; 32 is the bidirectional DC-DC converter; 33 is the electricity meter; 34 is the switch; 35 is the shunt; 41 is the electrolyte leakage sensor; 42 is the humidity sensor. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0028] This embodiment provides a lead-carbon battery energy storage cabinet, such as Figure 1-2 As shown, the system includes a cabinet 10 and a cabinet door 11. The cabinet 10 is a standard cabinet with dimensions of 600mm*800mm*2000mm. At least one side of the cabinet 10 has an opening; in this embodiment, openings are preferably located on opposite sides of the cabinet 10. The cabinet door 11 is positioned at this opening to close the cabinet 10. The cabinet 10 contains a management compartment and an energy compartment. Preferably, the management compartment is located above the energy compartment, near the top of the cabinet 10. The management compartment contains a power management module 30, which monitors and maintains the stability of electrical parameters such as power and voltage within the energy compartment. The energy compartment contains multiple energy storage modules 20 arranged along its height. Each energy storage module 20 includes a support frame 21 and lead-carbon battery cells 22. The support frame 21 is welded from channel steel. Preferably, the upper surface of the support frame 21 is divided by... The partition 28 is divided into limiting areas that can limit the position of the lead-carbon battery cells 22. It is understood that the size of the limiting area should correspond to the size of the lead-carbon battery cells 22 in order to achieve effective placement of the lead-carbon battery cells 22. Multiple lead-carbon battery cells 22 are placed sideways in their respective limiting areas to form a lead-carbon battery pack. In this embodiment, placing the lead-carbon battery cells 22 sideways helps to reduce the overall height of the energy storage module 20, thereby increasing the amount of energy storage modules 20 that the cabinet 10 can store. This solves the problem of low operating voltage of the energy storage cabinet due to the low energy density of the lead-carbon battery cells 22. In addition, the use of limiting areas to fix the lead-carbon battery cells 22 in this embodiment helps to ensure that the spacing between the lead-carbon battery cells 22 in the lead-carbon battery pack is constant and uniform, avoiding the problem of poor heat dissipation due to the close arrangement of adjacent lead-carbon battery cells 22, which would affect the normal operation of the energy storage module 20.

[0029] As a preferred embodiment, the support frame 21 is provided with a fixing member for mounting it inside the cabinet 10. This fixing member is either a threaded hole 24 or a slide rail 25. Figures 3a-3b As shown in 4a-4b; when it is a threaded hole 24, a threaded hole 24 is provided on the channel steel on both sides of the width direction of the support frame 21. The threaded hole 24, together with the bolt, can fix the support frame 21 inside the cabinet 10; when it is a slide rail 25, an outwardly extending inverted "L"-shaped edge plate is welded on the channel steel on both sides of the width direction of the support frame 21. The inverted "L"-shaped edge plate serves as the slide rail 25. At the same time, a guide rail (not shown in the figure) corresponding to the slide rail 25 is provided at the corresponding position on the side wall of the cabinet 10. It can be understood that the structure of the guide rail should be adapted to the inverted "L"-shaped edge plate to ensure that it can support the inverted "L"-shaped edge plate and slide relative to it. As a specific implementation of this embodiment, the structure of the guide rail is a steel groove, and the end of the inverted "L"-shaped edge plate can be inserted into the groove and slide relative to the groove. Alternatively, the structure of the guide rail is a mirror structure of "L" shape, and the two are nested and interlocked with each other, such as Figure 4b As shown.

[0030] Understandably, in this embodiment, the assembly method of the energy storage module 20 is selected according to the actual structure of the fastener. When it is a threaded hole 24, the support frame 21 can be fixed to the corresponding position of the cabinet 10 with bolts first, and then the lead-carbon battery cell 22 can be installed on the support frame 21. When it is a slide rail 25, the lead-carbon battery cell 22 can be installed on the support frame 21 to form the energy storage module 20, and then the entire support frame 21 can be fixed in the cabinet 10 through the cooperation of the slide rail 25 and the guide rail.

[0031] As a preferred embodiment, the power management module includes, in addition to, the following: Figure 7In addition to the bidirectional DC-DC converter 32, supercapacitor, and switch 34 shown, the system also includes a meter 33 and a shunt 35. The supercapacitor and energy storage module 20 are connected to the same DC bus 31, which is connected to the power grid or load. The supercapacitor and energy storage module 20 provide a stable and smooth power source to the DC bus 31 in stages. The bidirectional DC-DC converter 32 is installed between the supercapacitor and the DC bus 31. This DC-DC converter acts as a controller for the supercapacitor, controlling its charging, discharging, and stopping states. The switch 34 is installed between the lead-carbon battery pack and the DC bus 31. This switch 34 is a circuit breaker or contactor; in this embodiment, it is preferably an air circuit breaker (referred to as an air switch), which serves as the control switch for the lead-carbon battery pack. In this embodiment, the power management module is electrically connected to the existing battery energy management system (EMS). The battery energy management system (EMS) can monitor the power changes required by the DC bus 31 in real time. When a large instantaneous power fluctuation is required or occurs during charging and discharging, in order to avoid the energy storage module 20 being subjected to a large current impact, the voltage can be boosted or bucked through a DC-DC converter, so that the supercapacitor can operate within a wide voltage range and always provide a stable voltage to the DC bus 31. When the power is in a stable state, the energy storage module 20 is started through the circuit breaker to provide stable power to the DC bus 31. The use of this power management module in this embodiment can extend the service life of the energy storage module 20, i.e., the lead-carbon battery. At the same time, it can also improve the response speed of the lead-carbon battery energy storage cabinet and ensure the safety of the lead-carbon battery energy storage cabinet.

[0032] like Figures 3a-3b As shown in Figures 4a-4b, this is a schematic diagram of the overall structure of the energy storage module 20 provided in this embodiment. The energy storage module 20 includes a support frame 21 and a lead-carbon battery pack composed of multiple lead-carbon battery cells 22. In this embodiment, the support frame 21 is preferably divided into four sets of limiting areas by cross-shaped dividing blocks to limit the position of the lead-carbon battery pack. Multiple lead-carbon battery cells 22 are placed sideways in the corresponding limiting areas to form the lead-carbon battery pack. In order to further ensure the stability of the lead-carbon battery installation, it is preferable to provide a fixing strip 23 on the support frame 21. The fixing strip 23 is arranged along the length of the support frame 21 to bind and reinforce the lead-carbon battery pack. The fixing strip 23 can not only fix the lead-carbon battery pack, but also prevent the battery pack from expanding and bulging during long-term use. It can be understood that the fixing strip 23 can be a traditional flexible insulating tape or a rigid insulating clip, which can be selected according to the actual installation needs.

[0033] As a preferred embodiment, an equalization module 26 is installed on each lead-carbon battery cell 22 constituting the lead-carbon battery pack, and each lead-carbon battery cell 22 is connected in series through a wiring harness 27. By installing the equalization module 26, the following functions can be achieved: First, to achieve dynamic equalization during charging, discharging and resting processes, so that the voltages of each lead-carbon battery cell 22 in the lead-carbon battery pack are as close as possible; Second, to detect the status of the lead-carbon battery pack, including voltage, current, temperature, etc., and to provide alarm prompts to the user.

[0034] As a preferred embodiment, both the cabinet door 11 and the top of the cabinet are provided with heat dissipation holes 12. The heat dissipation holes 12 on the cabinet door 11 can be mesh holes or round holes, such as... Figures 5a-5b The cabinet door 11 shown has a rectangular heat dissipation hole 12 on the top of the cabinet. In this embodiment, by setting the heat dissipation hole 12 on the cabinet door 11 and the top of the cabinet, an effective heat dissipation channel can be formed, which improves the safety of the cabinet 10.

[0035] As a preferred embodiment, an electrolyte leakage sensor 41 and / or a humidity sensor 42 are arranged on the inner side of the bottom of the cabinet 10. Preferably, both the electrolyte leakage sensor 41 and the humidity sensor 42 are arranged simultaneously in this embodiment. Figure 6 As shown, the electrolyte leakage sensor 41 is a VOC sensor. Through the coordinated operation of the two sensors, electrolyte leakage in the cabinet 10 can be detected in a timely manner, thereby improving the safety of the cabinet 10.

[0036] In summary, the lead-carbon battery energy storage cabinet in this embodiment achieves a reasonable distribution density of lead-carbon batteries by using partitioned installation and lateral placement of the individual lead-carbon battery cells 22, avoiding poor heat dissipation due to close contact. Furthermore, it reduces the volume of the energy storage module 20, improving its compactness and laying the foundation for designing high-voltage energy storage cabinets. In addition, the power distribution structure composed of supercapacitors and energy storage modules 20 in the power management module provides smooth and stable power to the DC bus 31, reducing the impact of high current on the lead-carbon batteries, thereby improving the service life of the energy storage module 20 and the overall safety of the energy storage cabinet. Therefore, the lead-carbon battery energy storage cabinet in this embodiment has advantages such as compact structure, small footprint, high safety, and long service life, making it a good alternative to lithium battery energy storage cabinets with certain market prospects and economic benefits.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lead-carbon battery energy storage cabinet, comprising a cabinet and a door, characterized in that, The cabinet has an opening on at least one side, and the cabinet door is located at the opening to close the cabinet. The cabinet also has a management compartment and an energy compartment. The management compartment has a power management module, and the energy compartment has multiple energy storage modules. Each energy storage module includes a support frame and lead-carbon battery cells. The upper surface of the support frame has a limiting area, and multiple lead-carbon battery cells are placed sideways in their respective limiting areas to form a lead-carbon battery pack.

2. The lead-carbon battery energy storage cabinet according to claim 1, characterized in that, The support frame is provided with a fastener for mounting it in the cabinet. The fastener is either a threaded hole or a slide rail. When it is a slide rail, a guide rail corresponding to the slide rail is provided at a corresponding position on the side wall of the cabinet.

3. The lead-carbon battery energy storage cabinet according to claim 1, characterized in that, The power management module includes at least a bidirectional DC-DC converter, a supercapacitor, and a switching device. The supercapacitor and the energy storage module are connected to the same DC bus, and the DC bus is connected to the power grid or a load. The bidirectional DC-DC converter is installed between the supercapacitor and the DC bus, and the switching device is installed between the energy storage module and the DC bus.

4. The lead-carbon battery energy storage cabinet according to claim 3, characterized in that, The switching device is a contactor or a circuit breaker.

5. The lead-carbon battery energy storage cabinet according to claim 1, characterized in that, The support frame is equipped with fixing strips, which are arranged along the length of the support frame to bind and reinforce the lead-carbon battery pack.

6. The lead-carbon battery energy storage cabinet according to claim 1, characterized in that, Each lead-carbon battery cell constituting the lead-carbon battery pack is equipped with an equalization module, and the lead-carbon battery cells are connected in series via a wiring harness.

7. The lead-carbon battery energy storage cabinet according to claim 1, characterized in that, Both the cabinet door and the top of the cabinet are equipped with ventilation holes.

8. The lead-carbon battery energy storage cabinet according to claim 1, characterized in that, An electrolyte leakage sensor and / or humidity sensor are installed at the bottom of the cabinet.

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