A sodium ion battery management system for rail transit

Abstract

The present invention discloses a sodium ion battery management system for rail transit, comprising a city power supply module, which is connected to the city power grid and is divided into a powered state and a power-off state. The powered state serves as the main power source for controlling rail transit communications; a track signal release module, which is composed of a signal light, a sensor, a monitor, and an alarm, and is responsible for transmitting rail transit status; and a sodium ion battery module, which includes three groups of sodium ion batteries and is used to power the track signal release module when the city power grid is out of power. When the humidity detection module detects that the sodium ion battery module is in an ambient humidity greater than 45%, the dehumidification module dehumidifies the sodium ion battery module until the ambient humidity is less than 45%. This can keep the sodium ion battery module in a dry state at all times, prevent the sodium ion battery module from being affected by moisture, and increase the service life of the sodium ion battery.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a sodium ion battery management system used in rail transportation. Background Art

[0002] Sodium-ion battery is a secondary battery that is usually used as a backup power source in rail transit. It mainly relies on the movement of sodium ions between the positive and negative electrodes to work. The raw materials of sodium-ion batteries are more abundant than those of lithium batteries, so the raw materials of sodium-ion batteries are cheaper. Aluminum foil can be used for both the positive and negative electrodes of sodium-ion batteries, which is low in cost. Sodium-ion batteries also charge quickly and are highly safe. They can adapt to high and low temperatures between -30 and 80 degrees Celsius without too much energy attenuation. They have also shown good stability through various impact and pressure tests such as needle puncture.

[0003] However, the existing sodium-ion batteries have a huge capacity and cannot be charged with a high-power charging device when using a single charger. Therefore, the charging speed is slow during the charging process of the sodium-ion batteries in rail transit, which is not conducive to use. Forcibly using a single high-power sodium-ion battery charging device will reduce the service life of the sodium ions and reduce the capacitance in the sodium-ion battery. In addition, sodium ions contain a large number of chemical elements, among which the raw materials of sodium ions are highly reactive and will react with water. Rail transit is usually underground and has heavy humidity all year round. Therefore, when the sodium-ion battery is corroded by moisture, the sodium in the sodium-ion battery will react with moisture, resulting in the loss of sodium elements in the sodium-ion battery, thereby reducing the service life of the sodium-ion battery. Summary of the Invention

[0004] The purpose of the present invention is to provide a sodium ion battery management system for rail transportation to solve the above-mentioned deficiencies in the technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sodium ion battery management system for rail transit, comprising a city power supply module, which is connected to the city power grid and is divided into a powered state and a powered-off state. The powered state serves as the main power source for controlling rail transit communications; a track signal release module, which is composed of a combination of signal lights, sensors, monitors, and alarms, and is responsible for transmitting rail transit status; a sodium ion battery module, which includes three groups of sodium ion batteries and is used to power the track signal release module when the city power grid is out of power; and a computer control unit, which is used to integrate and control the track signal release module, the city power supply module, and the sodium ion battery module.

[0006] Preferably, the computer control unit is connected to a power transmission module, the power transmission module is connected to a voltage stabilizing module, and the voltage stabilizing module is connected to a track signal release module; by receiving a release signal unit, the data required by the track signal release module can be transmitted to the computer control unit. When the computer control unit cuts off the power to the city power module, the electricity of the sodium ion battery module is input into the track signal release module through the power transmission module and the voltage stabilizing module.

[0007] Preferably, the sodium ion battery module is connected to a power metering module, which expresses the remaining power in the sodium ion battery module as a percentage. The sodium ion battery module has a safe reserve power of 5%-8%. The sodium ion battery module is connected to a sodium ion charging module, which is connected to a city power supply module. There are three groups of sodium ion charging modules.

[0008] Preferably, when the remaining power of the sodium ion battery module is ≥60% as obtained by the power metering module, the sodium ion battery module is not powered when the city power supply module has power; when the remaining power of the sodium ion battery module is ≤60% as obtained by the power metering module, the city power supply module charges the sodium ion battery module through the sodium ion charging module.

[0009] Preferably, the sodium ion charging module is provided with a BMS, and the sodium ion charging module is provided with a low-voltage DC conversion module. The three groups of sodium ion battery modules can balance the amount of electricity in the sodium ion battery during the charging process. When the amount of electricity in the sodium ion battery module is less than 90%, it continues to be charged through the sodium ion charging module. When the amount of electricity in the sodium ion module is ≥90%, it is charged through the low-voltage DC conversion module, and the sodium ion charging module switches to trickle mode, which is conducive to the recycling of the sodium ion battery module and improves the service life of the sodium ion battery module. By using three groups of sodium ion batteries with three groups of chargers, it is avoided that multiple groups of sodium ion batteries are used with a single charger, which prevents the battery capacity from being large and the charging power from being small, and the required charging time from being longer. Therefore, the charging time of the sodium ion battery module is shortened and the charging efficiency of the sodium ion battery module is improved.

[0010] Preferably, a humidity detection module is provided on one side of the sodium ion battery module, and the humidity detection module is provided with a dehumidification module.

[0011] Preferably, when the humidity detection module detects that the sodium ion battery module is in an ambient humidity of ≤45%, there is no need to process the sodium ion battery module. When the sodium ion battery module is in an ambient humidity of >45%, the dehumidification module dehumidifies the sodium ion battery module until the sodium ion battery module is in an ambient humidity of ≤45%. The sodium ion battery module can be kept in a dry state at all times, thereby preventing the sodium ion battery module from being affected by moisture and improving the service life of the sodium ion battery.

[0012] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0013] Three groups of sodium-ion batteries are charged through three groups of chargers, and the three groups of sodium-ion batteries are charged by balancing the three groups of chargers through the BMS. When the sodium-ion module power is ≥90%, the sodium-ion charging module is switched to trickle mode through the low-voltage DC conversion module, which is conducive to the recycling of the sodium-ion battery module and improves the service life of the sodium-ion battery module. By using three groups of sodium-ion batteries with three groups of chargers, it is avoided that multiple groups of sodium-ion batteries are used with a single charger, which prevents the battery capacity from being large and the charging power from being small, and the required charging time from being longer. Therefore, the charging time of the sodium-ion battery module is shortened and the charging efficiency of the sodium-ion battery module is improved.

[0014] When the humidity detection module detects that the sodium-ion battery module is in an ambient humidity greater than 45%, the dehumidification module dehumidifies the sodium-ion battery module until the ambient humidity of the sodium-ion battery module is less than or equal to 45%. This can keep the sodium-ion battery module in a dry state at all times, prevent the sodium-ion battery module from being affected by moisture, and increase the service life of the sodium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Example 1

[0019] Refer to the instruction manual Figure 1A sodium ion battery management system for rail transit includes a city power supply module, which is connected to the city power grid and is divided into a powered state and a power-off state. The powered state serves as the main power source to control rail transit communications; a rail signal release module, which is composed of a combination of signal lights, sensors, monitors and alarms, and is responsible for sending rail transit status; a sodium ion battery module, which includes three groups of sodium ion batteries and is used to power the rail signal release module when the city power grid is out of power; a computer control unit, which is used to integrate and control the rail signal release module, the city power supply module, and the sodium ion battery module, the computer control unit is connected to a power transmission module, the power transmission module is connected to a voltage stabilizing module, and the voltage stabilizing module is connected to the rail signal release module; by receiving the release signal unit, the data required by the rail signal release module can be transmitted to the computer control unit, and when the computer control unit cuts off the power of the city power module, the power of the sodium ion battery module is input into the rail signal release module through the power transmission module and the voltage stabilizing module.

[0020] Example 2

[0021] Refer to the instruction manual Figure 1 Based on the first embodiment, the sodium ion battery module is connected to a power metering module, which expresses the remaining power in the sodium ion battery module as a percentage. The sodium ion battery module has a safe reserve power of 5%-8%. The sodium ion battery module is connected to a sodium ion charging module, which is connected to a city power supply module. The sodium ion charging module is provided with three groups. When the remaining power of the sodium ion battery module is ≥60% as determined by the power metering module, the sodium ion battery module is not supplied with power when the city power supply module has power. When the remaining power of the sodium ion battery module is ≤60% as determined by the power metering module, the city power supply module charges the sodium ion battery module through the sodium ion charging module.

[0022] Example 3

[0023] Refer to the instruction manual Figure 1 Based on the first embodiment, the sodium ion charging module is provided with a BMS, and the sodium ion charging module is provided with a low-voltage DC power conversion module. The three groups of sodium ion battery modules can balance the charge in the sodium ion battery during the charging process. When the charge of the sodium ion battery module is less than 90%, the sodium ion charging module continues to charge. When the charge of the sodium ion module is ≥90%, the sodium ion charging module switches to a trickle mode through the low-voltage DC power conversion module, which is conducive to the recycling of the sodium ion battery module and improves the service life of the sodium ion battery module. By using three groups of sodium ion batteries with three groups of chargers, it is avoided that multiple groups of sodium ion batteries are used with a single charger, which prevents the battery capacity from being large and the charging power from being small, which requires a longer charging time. Therefore, the charging time of the sodium ion battery module is shortened and the charging efficiency of the sodium ion battery module is improved.

[0024] Example 4

[0025] Refer to the instruction manual Figure 1 Based on the first embodiment, a humidity detection module is provided on one side of the sodium ion battery module, and the humidity detection module is provided with a dehumidification module. When the humidity detection module detects that the sodium ion battery module is in an ambient humidity of 45% or less, the sodium ion battery module does not need to be processed. When the sodium ion battery module is in an ambient humidity of more than 45%, the dehumidification module dehumidifies the sodium ion battery module until the ambient humidity of the sodium ion battery module is in an ambient humidity of 45% or less. This can keep the sodium ion battery module in a dry state at all times, prevent the sodium ion battery module from being affected by moisture, and increase the service life of the sodium ion battery.

[0026] Working principle of the present invention:

[0027] Refer to the instruction manual Figure 1 , when the city power supply is not in a short supply state, the computer control unit gives the track signal release module an empty point, and at the same time, when the sodium ion battery module is ≤60%, it is charged through the sodium ion charging module, and the three groups of sodium ion batteries are charged by three groups of chargers. The three groups of sodium ion batteries are charged by the three groups of chargers through the BMS balance. When the sodium ion module power is ≥90%, the sodium ion charging module is switched to trickle mode through the low-voltage DC conversion module, which is conducive to the recycling of the sodium ion battery module and improves the service life of the sodium ion battery module. By using three groups of sodium ion batteries with three groups of chargers, it is avoided that multiple groups of sodium ion batteries are used with a single charger to prevent the battery capacity from being large and the charging power from being small, and the charging time required is longer. Therefore, the charging time of the sodium ion battery module is shortened and the charging efficiency of the sodium ion battery module is improved. After the sodium ion battery is fully charged, 5%-8% of the battery remaining is retained to ensure the safety effect of the sodium ion battery module. After the source power supply module is powered off, power is supplied to the computer control unit and the track signal release module through the sodium ion battery module. When the track signal release module needs to work, the power is input into the computer control unit through the receiving release signal unit. The computer control unit inputs the power of the sodium ion battery module to the track signal module through the power transmission module and the voltage stabilizing module to ensure the normal operation of the track signal release module. The voltage stabilizing module can protect the track signal release module from overload and improve its service life. When the humidity detection module detects that the sodium ion battery module is in an ambient humidity of ≤45%, the sodium ion battery module does not need to be processed. When the sodium ion battery module is in an ambient humidity of >45%, the dehumidification module dehumidifies the sodium ion battery module until the ambient humidity is ≤45%. This can keep the sodium ion battery module in a dry state at all times, prevent the sodium ion battery module from being affected by moisture, and improve the service life of the sodium ion battery.

[0028] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A sodium ion battery management system for rail transportation, characterized in that The system includes: a city power supply module, which is connected to the city power grid and has two states: powered and unpowered. The powered state serves as the main power source for controlling rail transit communications; a track signal release module, which is composed of signal lights, sensors, monitors, and alarms and is responsible for transmitting rail transit status; a sodium ion battery module, which includes three groups of sodium ion batteries and is used to power the track signal release module when the city power grid is out of power; and a computer control unit, which is used to integrate and control the track signal release module, the city power supply module, and the sodium ion battery module. The computer control unit is connected to a power transmission module, which is connected to a voltage stabilizing module, and the voltage stabilizing module is connected to a track signal release module. By receiving the release signal unit, the data required by the track signal release module can be transmitted to the computer control unit. When the computer control unit cuts off the power of the city power module, the power of the sodium ion battery module is input into the track signal release module through the power transmission module and the voltage stabilizing module. The sodium ion battery module is connected to a power metering module, which expresses the remaining power in the sodium ion battery module as a percentage. The sodium ion battery module has a safe reserve power of 5%-8%. The sodium ion battery module is connected to a sodium ion charging module, which is connected to a city power supply module. The sodium ion charging module is provided with three groups; When the remaining power of the sodium ion battery module is greater than 60% as determined by the power metering module, the sodium ion battery module is not supplied with power when the city power supply module has power. When the remaining power of the sodium ion battery module is less than or equal to 60% as determined by the power metering module, the city power supply module charges the sodium ion battery module through the sodium ion charging module. The sodium ion charging module is provided with a BMS, and the sodium ion charging module is provided with a low-voltage DC power conversion module. The three groups of sodium ion battery modules can balance the power in the sodium ion battery during the charging process. When the power of the sodium ion battery module is less than 90%, it continues to be charged through the sodium ion charging module. When the power of the sodium ion module is ≥90%, it is charged through the low-voltage DC power conversion module, and the sodium ion charging module switches to trickle mode; A humidity detection module is provided on one side of the sodium ion battery module, and the humidity detection module is provided with a dehumidification module; When the humidity detection module detects that the sodium ion battery module is in an ambient humidity of ≤45%, the sodium ion battery module does not need to be processed. When the sodium ion battery module is in an ambient humidity of >45%, the dehumidification module dehumidifies the sodium ion battery module until the sodium ion battery module is in an ambient humidity of ≤45%.

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