Parallel battery management system and method

Abstract

The invention discloses a parallel battery management system and method. The system comprises a plurality of energy storage batteries, a plurality of cooling devices and a cover plate, the plurality of energy storage batteries are buried under the stratum at intervals, the plurality of cooling devices are buried in the stratum and are respectively positioned at the peripheries of the plurality of energy storage batteries, and the plurality of cooling devices are respectively attached to and close to the plurality of energy storage batteries for cooling; the cover plate is arranged on the surface of the ground layer and covers the energy storage batteries and the cooling devices in a sealing mode. The plurality of energy storage batteries and the plurality of cooling devices are buried in the stratum, so that the space occupied by the ground is effectively reduced, the construction cost is greatly reduced, meanwhile, the state grid, the wind power generation device and the solar power generation device can charge the energy storage batteries, the charging modes are diversified, and the charging efficiency is improved. And the state grid can only charge the energy storage battery in the valley-peak period or the flat-peak period, so that the cost of electric energy storage is greatly reduced.

Description

Technical Field

[0001] The present invention relates to battery management technology, and in particular to a parallel battery management system and method. Background Art

[0002] Electric energy is indispensable in people's life or work. In some environments with limited power supply, electric energy storage devices are usually needed to realize the storage, transportation, and time-sharing application of electric energy. At present, the common method is to convert electric energy into mechanical energy, chemical energy, electric field energy, etc. for storage. The energy density, power density, cost, and conversion efficiency of energy storage devices affect their application and promotion. Chemical energy storage has been widely used due to its advantages such as high power density, high energy density, high conversion efficiency, and low preparation and use costs. Batteries are the most widely used electric energy storage devices. Commonly used battery types include lead-acid batteries and lithium-ion batteries.

[0003] At present, energy storage stations generally use parallel battery management systems and methods. In the prior art, such parallel battery management systems are built on the ground as a whole, occupying a large ground space and having high construction costs. Moreover, such parallel battery management systems can usually only be connected to the national grid, which will charge the energy storage batteries of the parallel battery management system at any time, resulting in high energy storage costs. Therefore, it is necessary to improve the current parallel battery management system and methods. Summary of the invention

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a parallel battery management system and method, which can effectively solve the problems of high construction cost and high energy storage cost in the existing parallel battery management systems and methods.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A parallel battery management system comprises a plurality of energy storage batteries, a plurality of cooling devices and a cover plate; the plurality of energy storage batteries are buried in the ground at intervals, the plurality of cooling devices are buried in the ground and are respectively located at the peripheries of the plurality of energy storage batteries, and the plurality of cooling devices are respectively close to the plurality of energy storage batteries for cooling; the cover plate is arranged on the surface of the ground and seals directly above the plurality of energy storage batteries and the plurality of cooling devices, a charging management circuit and a power supply management circuit are arranged in the cover plate, the input end of the charging management circuit is connected to the national power grid, a wind power generation device and a solar power generation device, the output end of the charging management circuit is connected in parallel to the plurality of energy storage batteries, the input end of the power supply management circuit is connected in parallel to the plurality of energy storage batteries, and the output end of the power supply management circuit is connected to electrical equipment and the plurality of cooling devices.

[0007] Preferably, a plurality of accommodating grooves are concavely provided on the surface of the stratum, and the plurality of energy storage batteries are adapted to the plurality of accommodating grooves and are removably disposed in the accommodating grooves.

[0008] Preferably, the cover plate is provided with a plurality of windows for taking out or putting the energy storage batteries into the accommodating grooves, the windows are vertically connected to the accommodating grooves, and a cap is provided for each window to cover the window.

[0009] Preferably, a water retaining ring is protrudingly provided on the peripheral edge of the surface of the window, and the cover cap and the water retaining ring are sealed and fixed together.

[0010] Preferably, the energy storage battery is a lithium ion battery, a lead acid battery, a sodium ion battery or a flow battery.

[0011] A parallel battery management method, using a parallel battery management system, includes the following steps:

[0012] (1) The charging management circuit controls the connection to the national grid during off-peak or off-peak periods, and the national grid charges each energy storage battery individually or in combination through the charging management circuit. During windy periods and sunny periods, the wind power generation device and the solar power generation device are automatically started, and each energy storage battery is charged individually or in combination through the charging management circuit;

[0013] (2) During the charging or discharging process, the energy storage battery generates heat. The power management circuit supplies power to the cooling device, so that each cooling device starts to operate and dissipates heat quickly and timely for each energy storage battery, thereby improving the charging and discharging efficiency of the energy storage battery.

[0014] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0015] By burying multiple energy storage batteries and multiple cooling devices in the ground, the space occupied by the ground is effectively reduced, which greatly reduces the construction cost. At the same time, the national grid, wind power generation devices and solar power generation devices can all charge the energy storage batteries. The charging methods are diversified, and the national grid can only charge the energy storage batteries during off-peak hours or off-peak hours, which greatly reduces the cost of electricity storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0017] Figure 2 It is a circuit control schematic diagram of a preferred embodiment of the present invention.

[0018] Description of the accompanying drawings:

[0019] 10. Energy storage battery 20. Cooling device

[0020] 30. Cover plate 31. Charging management circuit

[0021] 32. Power supply management circuit 33. Cap

[0022] 301, window 302, water retaining ring

[0023] 40. Layer 41. Accommodation tank

[0024] 51. State Grid 52. Wind power generation equipment

[0025] 53. Solar power generation device 54. Electrical equipment DETAILED DESCRIPTION

[0026] Please refer to Figure 1 and Figure 2 As shown, it shows the specific structure of a parallel battery management system of a preferred embodiment of the present invention, including a plurality of energy storage batteries 10, a plurality of cooling devices 20 and a cover plate 30.

[0027] The multiple energy storage batteries 10 are buried under the stratum 40 at intervals, the multiple cooling devices 20 are buried under the stratum 40 and are respectively located at the periphery of the multiple energy storage batteries 10, and the multiple cooling devices 20 are respectively close to the multiple energy storage batteries 10 for cooling. In an embodiment, a plurality of accommodating grooves 41 are concavely provided on the surface of the stratum 40, and the multiple energy storage batteries 10 are adapted to the multiple accommodating grooves 41 and can be placed in the accommodating grooves 41 to facilitate the replacement of the energy storage batteries 10. In addition, the energy storage battery 10 is a lithium ion battery, a lead storage battery, a sodium ion battery or a flow battery, without limitation.

[0028] The cover plate 30 is disposed on the surface of the stratum 40 and covers the plurality of energy storage batteries 10 and the plurality of cooling devices 20. A charging management circuit 31 and a power supply management circuit 32 are disposed in the cover plate 30. The input end of the charging management circuit 31 is connected to the national power grid 51, the wind power generation device 52 and the solar power generation device 53. The output end of the charging management circuit 31 is connected in parallel to each energy storage battery 10. The input end of the power supply management circuit 32 is connected in parallel to each energy storage battery 10. The output end of the power supply management circuit 32 is connected to the electrical equipment 54 and each cooling device 20. In this embodiment, the cover plate 30 is provided with a plurality of windows 301 for the energy storage battery 10 to be taken out of or put into the receiving groove 41. The windows 301 are connected to the receiving groove 41 in a vertically opposite manner. A cap 33 is disposed for each window 301, and the cap 33 covers the window 301. In addition, a water retaining ring 302 is protruding from the periphery of the surface of the window 301 , and the cover cap 33 and the water retaining ring 302 are sealed and fixed together to achieve waterproof sealing.

[0029] The present invention also discloses a parallel battery management method, which adopts the aforementioned parallel battery management system and includes the following steps:

[0030] (1) The charging management circuit 31 controls the connection to the national grid 51 during off-peak hours or off-peak hours, and the national grid 51 charges each energy storage battery 10 individually or in combination through the charging management circuit 31. During windy hours and sunny hours, the wind power generation device 52 and the solar power generation device 53 are automatically started, and each energy storage battery 10 is charged individually or in combination through the charging management circuit 31.

[0031] (2) During the charging or discharging process, the energy storage battery 10 generates heat. The power supply management circuit 32 supplies power to the cooling device 20, so that each cooling device 20 starts to operate and dissipates heat quickly and timely for each energy storage battery 10, thereby improving the charging and discharging efficiency of the energy storage battery 10.

[0032] The design focus of the present invention is: by burying multiple energy storage batteries and multiple cooling devices in the stratum, the space occupied by the ground is effectively reduced, thereby greatly reducing the construction cost. At the same time, the national grid, wind power generation devices and solar power generation devices can all charge the energy storage batteries, and the charging methods are diversified. The national grid can only charge the energy storage batteries during off-peak hours or off-peak hours, which greatly reduces the cost of electric energy storage.

[0033] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A parallel battery management system, characterized in that: The invention comprises a plurality of energy storage batteries, a plurality of cooling devices and a cover plate; the plurality of energy storage batteries are buried in the ground at intervals, the plurality of cooling devices are buried in the ground and are respectively located at the periphery of the plurality of energy storage batteries, and the plurality of cooling devices are respectively close to the plurality of energy storage batteries for cooling; the cover plate is arranged on the surface of the ground and seals directly above the plurality of energy storage batteries and the plurality of cooling devices, a charging management circuit and a power supply management circuit are arranged in the cover plate, the input end of the charging management circuit is connected to the national power grid, the wind power generation device and the solar power generation device, the output end of the charging management circuit is connected in parallel to the plurality of energy storage batteries, the input end of the power supply management circuit is connected in parallel to the plurality of energy storage batteries, and the output end of the power supply management circuit is connected to the electrical equipment and the plurality of cooling devices.

2. A parallel battery management system according to claim 1, characterized in that: A plurality of accommodating grooves are concavely arranged on the surface of the stratum, and the plurality of energy storage batteries are adapted to the plurality of accommodating grooves and can be removed and placed in the accommodating grooves.

3. A parallel battery management system as claimed in claim 2, characterized in that: The cover plate is provided with a plurality of windows for taking out or putting the energy storage batteries into the accommodating grooves, the windows are vertically connected to the accommodating grooves, and a cap is provided for each window to cover the window.

4. A parallel battery management system as claimed in claim 3, characterized in that: A water retaining ring is convexly arranged on the peripheral edge of the surface of the window, and the cover cap and the water retaining ring are sealed and sleeved together and fixed together.

5. A parallel battery management system as claimed in claim 1, characterized in that: The energy storage battery is a lithium ion battery, a lead storage battery, a sodium ion battery or a flow battery.

6. A parallel battery management method, characterized in that: A parallel battery management system according to any one of claims 1 to 5 is used, comprising the following steps: (1) The charging management circuit controls the connection to the national grid during off-peak or off-peak periods, and the national grid charges each energy storage battery individually or in combination through the charging management circuit. During windy periods and sunny periods, the wind power generation device and the solar power generation device are automatically started, and each energy storage battery is charged individually or in combination through the charging management circuit; (2) During the charging or discharging process, the energy storage battery generates heat. The power management circuit supplies power to the cooling device, so that each cooling device starts to operate and dissipates heat quickly and timely for each energy storage battery, thereby improving the charging and discharging efficiency of the energy storage battery.

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