Power distribution terminal backup power supply performance management method

Abstract

The invention provides a power distribution terminal back-up power supply performance management method, which comprises the following steps: configuring a dehumidifier to adjust the environment humidity and configuring a temperature control box body or / and attaching a cooling material to adjust the environment temperature based on the peripheral environment of a power distribution terminal back-up power supply; based on a storage battery in the power distribution terminal backup power supply, a power supply management module is configured on a specified monitoring host to carry out on-line monitoring on the voltage, internal resistance and temperature of the storage battery, carry out on-line monitoring on environment humidity and environment humidity, and further carry out parameter setting and on-line monitoring on floating charge, equalized charge and activation of the storage battery. By implementing the system, floating charge, equalized charge and activation of the storage battery can be managed, and the voltage, internal resistance, temperature, environment humidity and environment temperature of the storage battery can be monitored on line.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a method for managing the performance of a backup power supply of a power distribution terminal. Background Art

[0002] In order to further improve the success rate of self-healing and rapid power restoration of the distribution network, lean management and reliability improvement of the distribution terminal backup power supply operation and maintenance are becoming increasingly important.

[0003] However, the existing backup power supply management of distribution terminals is limited to online monitoring of battery voltage, internal resistance, temperature and ambient temperature, but lacks management of other battery performance (such as floating charge, equalizing charge and activation performance) and ambient temperature management.

[0004] Therefore, it is necessary to propose a new method for performance management of backup power supply for distribution terminals, which can not only manage battery floating charge, equalization charge and battery activation, but also monitor battery voltage, internal resistance, temperature, ambient humidity and ambient temperature online. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a method for managing the performance of a backup power supply for a distribution terminal, which can not only manage the floating charge, equalization charge and activation of the battery, but also monitor the battery voltage, internal resistance, temperature, ambient humidity and ambient temperature online.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for managing the performance of a backup power supply of a power distribution terminal, the method comprising the following steps:

[0007] Based on the peripheral environment where the backup power supply of the power distribution terminal is located, a dehumidifier is configured to adjust the ambient humidity, and a temperature control box or / and attached cooling materials are configured to adjust the ambient temperature;

[0008] Based on the battery in the backup power supply of the distribution terminal, a power management module is configured on the designated monitoring host to perform online monitoring of the battery voltage, internal resistance and temperature, and online monitoring of the ambient humidity and ambient temperature, as well as further parameter setting and online monitoring of the battery floating charge, equalization charge and activation.

[0009] Wherein, the temperature control box is composed of a bottom box and an upper cover; wherein,

[0010] The bottom box is a semi-enclosed structure surrounded by a bottom wall and four side walls, and is used to accommodate the backup power supply of the distribution terminal; each side wall and the bottom wall are a three-layer structure formed by an outer layer, an intermediate layer and an inner layer, and each outer layer and each inner layer are injection molded by high temperature resistant and fireproof plastic, and each intermediate layer is filled with a heat insulating medium;

[0011] The bottom box is provided with a controller and a temperature sensor, a cooling plate and / or a fan connected thereto on at least one side wall; wherein the controller is used to send a control instruction to the cooling plate and / or the fan to start cooling when it is determined that the temperature measured by the temperature sensor is greater than a set temperature;

[0012] The upper cover is arranged directly above the bottom box and is provided with a vent hole for discharging the gas produced by the internal storage battery in the backup power supply of the power distribution terminal.

[0013] Wherein, the cooling material is a film-type material with a four-layer structure; wherein,

[0014] The thin film material includes a bottom layer, a second layer, a third layer and a top layer arranged in order from bottom to top; wherein the bottom layer is a metal polyethylene fluoride film layer; the second layer is a composite layer formed by doping polyethylene film with SiC nanoparticles; the third layer is a silicon oxide film layer with metal aluminum on the upper surface or a silicon nitride film layer with metal aluminum on the upper surface; and the top layer is an infrared emitting ethylene gas plate layer.

[0015] Among them, in the power management module, the parameters required to configure the battery float charge include the float charge voltage range and the corresponding change step, and the first boundary condition for triggering the battery float charge; wherein,

[0016] The first boundary condition is that the voltage value output by the battery pack in the backup power supply of the power distribution terminal at a certain moment is within the floating charge voltage range.

[0017] Among them, in the power management module, the parameters required to configure the battery equalization charging include the equalization charging current range and the corresponding change step, the equalization charging voltage range and the corresponding change step, the second boundary condition for triggering the battery equalization charging, and the process parameters after the battery equalization charging is started; Among them,

[0018] The second boundary condition is any one of the first to third conditions; wherein the first condition is that the output voltage value of the battery pack in the distribution terminal backup power supply after discharge is less than the first preset voltage value; the second condition is that the operation time of the distribution terminal backup power supply exceeds the first preset time threshold; the third condition is that the voltage difference between at least two battery cells in the distribution terminal backup power supply is greater than the second preset voltage value;

[0019] The process parameters include a constant equalizing charging current value used in the constant current and voltage limited equalizing charging process, a constant equalizing charging voltage value used to enter the constant voltage and current limited equalizing charging process from the constant current and voltage limited equalizing charging process, and a floating charging current value used to enter the floating charging state from the constant voltage and current limited equalizing charging process; the equalizing charging current value is within the equalizing charging current range, and its value is 1 / 10 of the output current value of the battery pack in the backup power supply of the distribution terminal; the equalizing charging voltage value is within the equalizing charging voltage range; the floating charging current value is 1 / 100 of the output current value of the battery pack.

[0020] Among them, in the power management module, the parameters required to configure the battery activation include the third boundary condition for triggering battery activation, the number of activations, and the discharge activation process parameters; wherein,

[0021] The third boundary condition is that the battery pack in the backup power supply of the power distribution terminal has been in service for a preset period of time;

[0022] The activation times are determined by the service life of the battery pack;

[0023] The discharge activation process parameters include an activation period and a corresponding change step, an activation completion voltage range and a corresponding change step, and a discharge time range and a corresponding change step.

[0024] Wherein, the battery cells in the battery pack are lithium iron phosphate batteries or sodium ion batteries.

[0025] Implementing the embodiments of the present invention has the following beneficial effects:

[0026] The present invention adjusts the ambient humidity by configuring a dehumidifier and adjusts the ambient temperature by configuring a temperature control box or / and attaching cooling materials, and configures a power management module on a designated monitoring host to monitor the battery voltage, internal resistance and temperature online, and to monitor the ambient humidity online, and further sets parameters and performs online monitoring on the battery floating charge, equalizing charge and activation, thereby not only being able to manage the battery floating charge, equalizing charge and activation, but also being able to monitor the battery voltage, internal resistance, temperature, ambient humidity and ambient temperature online. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0028] Figure 1A flow chart of a method for managing the performance of a backup power supply for a power distribution terminal provided by an embodiment of the present invention;

[0029] Figure 2 A front view of a temperature control box in a method for managing the performance of a backup power supply for a power distribution terminal provided by an embodiment of the present invention;

[0030] Figure 3 A cross-sectional view of a cooling material in a method for managing performance of a backup power supply for a power distribution terminal provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown in the figure, a method for managing the performance of a backup power supply for a power distribution terminal is proposed in an embodiment of the present invention, and the method comprises the following steps:

[0033] Step S1: Based on the peripheral environment of the backup power supply of the power distribution terminal, a dehumidifier is configured to adjust the ambient humidity, and a temperature control box is configured and / or a cooling material is attached to adjust the ambient temperature;

[0034] Step S2: Based on the battery in the backup power supply of the distribution terminal, a power management module is configured on the designated monitoring host to perform online monitoring of the battery voltage, internal resistance and temperature, and to perform online monitoring of the ambient humidity and ambient temperature, and further perform parameter setting and online monitoring of the battery floating charge, equalization charge and activation.

[0035] The specific process is as follows: in step S1, considering that the backup power supply of the distribution terminal is often installed in the ring network cabinet, a dehumidifier is usually used to adjust the environmental humidity. It can be understood that the intelligent control of the dehumidifier is generally controlled by a controller or other monitoring equipment, and the present invention is implemented by a designated monitoring host connected to the dehumidifier.

[0036] Furthermore, the design reduces the ambient temperature of the backup power supply of the distribution terminal; among them, the solutions for reducing the ambient temperature of the backup power supply of the distribution terminal include: first, using a small temperature control box; second, attaching cooling materials; and third, selecting non-lead-acid batteries with a wide temperature range.

[0037] At this time, if Figure 2 As shown, the temperature control box body is composed of a bottom box 11 and an upper cover 12; wherein the bottom box 11 is a semi-enclosed structure surrounded by a bottom wall 111 and four side walls 112, and is used to accommodate the backup power supply of the power distribution terminal; each side wall 112 and the bottom wall 111 are three-layer structures formed by an outer layer, an intermediate layer and an inner layer (not shown), and each outer layer and each inner layer are injection molded by high temperature resistant and fireproof plastic, and each intermediate layer is filled with a heat insulating medium;

[0038] The bottom box 11 is provided with a controller 13 and a temperature sensor 14, a cooling plate 15 and / or a fan 16 connected thereto on at least one side wall 112; wherein the controller 13 is used to send a control instruction to the cooling plate 15 and / or the fan 16 to start cooling when it is determined that the temperature measured by the temperature sensor 14 is greater than a set temperature (such as one of 25° C. to 40° C.), and the cooling is stopped when the temperature measured by the temperature sensor 14 is less than the set temperature; of course, the bottom box 11 is also designed with a waterproof quick-plug terminal with a self-locking function to connect the internal and external power supply wiring;

[0039] The upper cover 12 is arranged right above the bottom box 11 and is provided with a vent hole 121 for discharging the gas generated by the internal storage battery in the backup power supply of the power distribution terminal.

[0040] It is understandable that the temperature control box can effectively reduce the impact of ambient temperature on the battery.

[0041] At this time, if Figure 3 As shown, the cooling material is a film-type material with a four-layer structure; wherein the film-type material includes a bottom layer 21, a second layer 22, a third layer 23 and a top layer 24 arranged in order from bottom to top; wherein the bottom layer 21 is a metal polyethylene fluoride film layer; the second layer 22 is a composite layer formed by doping a polyethylene film with SiC nanoparticles; the third layer 23 is a silicon oxide film layer with metal aluminum on the upper surface or a silicon nitride film layer with metal aluminum on the upper surface; and the top layer 24 is an infrared emitting ethylene gas plate layer.

[0042] It can be understood that the attached cooling material can have high reflectivity to sunlight and selective high emissivity of the atmospheric window, and can continuously transfer the heat on the surface of objects under sunlight in the form of electromagnetic waves, thereby achieving a cooling effect.

[0043] At this time, the battery cells in the battery pack are lithium iron phosphate batteries or sodium ion batteries. Among them, lithium iron phosphate batteries are a type of lithium ion batteries, which refers to lithium ion batteries that use lithium iron phosphate as the positive electrode material. They are characterized by strong safety and stability, high temperature resistance, and good cycle performance. New energy vehicle power batteries basically use lithium ion batteries, with an energy density of 175-180Wh / kg, a cycle life of 2,000 times, and the battery structure does not change during the charge and discharge process. The self-discharge rate is small and can be applied to the operating temperature range of -20°C to 60°C.

[0044] Sodium-ion batteries work in a similar way to lithium-ion batteries. Compared with lithium-ion batteries, they do not have over-discharge characteristics, are lower in cost, and are suitable for operating temperatures between -40°C and 80°C. Sodium-ion batteries are safer and will not catch fire or explode in safety tests such as puncture, extrusion, overcharging, and over-discharging.

[0045] In step S2, first, a power management module is configured on the monitoring host, and different functional sub-modules are configured to realize online monitoring of different data, including but not limited to battery voltage online monitoring, battery internal resistance online monitoring, battery temperature online monitoring sub-module, ambient humidity online monitoring sub-module, ambient humidity online monitoring sub-module, battery float charge online monitoring sub-module, battery equalization charge online monitoring sub-module and battery activation online monitoring sub-module, etc.

[0046] At this time, according to the condition and standard requirements of new technologies such as floating charge, equalizing charge and activation of fixed storage batteries, different parameters are configured in the corresponding sub-modules in the power management module to realize online monitoring.

[0047] For example, the corresponding battery float charge parameters configured in the battery float charge online monitoring submodule include the float charge voltage range (such as 26.4V~27.6V) and the corresponding change step (such as 0.1V), as well as the first boundary condition for triggering the battery float charge; wherein the first boundary condition is that the voltage value output by the battery group in the backup power supply of the distribution terminal at a certain moment is within the set float charge voltage range.

[0048] For another example, the battery equalization charging online monitoring submodule corresponding to the battery equalization charging parameters includes the equalization charging current range (such as 1.8A-4A) and the corresponding change step (such as 0.1A), the equalization charging voltage range (such as 27.7V-28.7V) and the corresponding change step (such as 0.1V), the second boundary condition for triggering the battery equalization charging, and the process parameters after the battery equalization charging is triggered; wherein,

[0049] The second boundary condition is to satisfy any one of the first to third conditions; wherein the first condition is that the output voltage value of the battery pack in the distribution terminal backup power supply after discharge is less than the first preset voltage value (such as 13V after deep discharge); the second condition is that the operation time of the distribution terminal backup power supply exceeds the first preset time threshold (such as three months of operation); the third condition is that the voltage difference between at least two battery cells in the distribution terminal backup power supply is greater than the second preset voltage value (such as 1.5V);

[0050] The process parameters include a constant equalizing current value used in the constant-current and voltage-limited equalizing charging process, a constant equalizing voltage value used to enter the constant-voltage and current-limited equalizing charging process from the constant-current and voltage-limited equalizing charging process, and a floating charge current value used to enter the floating charge state from the constant-voltage and current-limited equalizing charging process; the equalizing current value is within the equalizing current range, and its value is 1 / 10 of the output current value of the battery pack in the backup power supply of the distribution terminal; the equalizing voltage value is within the equalizing voltage range; the floating charge current value is 1 / 100 of the output current value of the battery pack.

[0051] In one example, (1) a 12V 20Ah battery is charged at a constant current and voltage limit of 2A. When the battery pack voltage reaches 28.2V, it enters the constant voltage and current limit process. When the current decreases to 0.2A, it enters the floating charge state.

[0052] (2) The 12V 24Ah battery is charged at a constant current and voltage limit of 2.4A. When the battery pack voltage reaches 28.2V, it enters the constant voltage and current limit process. When the current decreases to 0.24A, it enters the floating charge state.

[0053] (3) The 12V 38Ah battery is charged at a constant current and voltage limit of 3.8A. When the battery pack voltage reaches 28.2V, it enters the constant voltage and current limit process. When the current decreases to 0.38A, it enters the floating charge state.

[0054] For another example, the battery activation online monitoring submodule corresponding to the battery activation configuration parameters include the third boundary condition for triggering battery activation, the number of activations, and the discharge activation process parameters; wherein,

[0055] The third boundary condition is that the service life of the battery pack in the backup power supply of the distribution terminal reaches the preset service life (such as two years); the number of activations is determined by the service life of the battery pack (such as once every six months in the second year and once every three months in the third year); the discharge activation process parameters include the activation cycle (such as 1 to 12 months) and the corresponding change step (such as 1 month), the activation completion voltage range (such as 22V to 27V) and the corresponding change step (such as 0.1V), and the discharge time range (such as 0 to 6 hours) and the corresponding change step (such as 0.1 hour).

[0056] Secondly, the monitoring host receives the voltage, current and temperature of the battery cells in the backup power supply of the distribution terminal in real time through the temperature sensor, voltage sensor and current sensor, so as to realize online monitoring of the battery voltage, internal resistance and temperature through the power management module;

[0057] The monitoring host receives the ambient humidity and ambient temperature obtained by the humidity sensor and temperature sensor in the ring network cabinet, so as to realize online monitoring of the ambient humidity and ambient temperature through the power management module;

[0058] The monitoring host receives the voltage and current of the battery in the distribution terminal backup power supply during floating charge, equalizing charge and activation in real time through the voltage sensor and current sensor, so as to realize parameter setting and online monitoring of the battery floating charge, equalizing charge and activation through the power management module.

[0059] It should be noted that in addition to implementing the management of the backup power supply performance of the distribution terminal by configuring the power management module, it is also necessary to strengthen the manual management of the backup power supply performance of the distribution terminal.

[0060] For example, conduct a battery inspection every three months to check whether the battery connection bolts are hot, check whether the battery appearance is abnormally deformed, check whether the connecting wires and bolts are loose or corroded, and tighten the loose bolts in time, and clean the corroded joints in time. Test the battery cell voltage and battery pack voltage. If the battery has been shelved for more than three months, it must be recharged before it is put into use.

[0061] Another example is to strengthen the equipment of battery operation and maintenance tools and instruments. First, accurately find the inflection point of battery degradation in the early stage of battery degradation. Second, effectively manage the operation curve of the battery (internal resistance curve or capacity change curve). Third, be able to intelligently start the regular operation and maintenance strategy of the battery.

[0062] For example, first, we went to the base of battery manufacturers to learn about the working principle, internal structure, detection and packaging, factory testing and other related knowledge of batteries, and have a deep understanding of batteries. Second, we invited the skill experts of the substation relay protection power supply class to jointly formulate a two-year systematic training plan for batteries, carry out a series of training, and cultivate a group of personnel with good distribution network power supply operation and maintenance skills. Third, we invited technical personnel from distribution network power supply management related manufacturers to carry out distribution network power supply operation and maintenance management improvement training to understand the advanced equipment and advanced operation and maintenance methods related to distribution network power supply.

[0063] Implementing the embodiments of the present invention has the following beneficial effects:

[0064] The present invention adjusts the ambient humidity by configuring a dehumidifier and adjusts the ambient temperature by configuring a temperature control box or / and attaching cooling materials, and configures a power management module on a designated monitoring host to monitor the battery voltage, internal resistance and temperature online, and to monitor the ambient humidity online, and further sets parameters and performs online monitoring on the battery floating charge, equalizing charge and activation, thereby not only being able to manage the battery floating charge, equalizing charge and activation, but also being able to monitor the battery voltage, internal resistance, temperature, ambient humidity and ambient temperature online.

[0065] A person skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, CD-ROM, etc.

[0066] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for managing the performance of a backup power supply for a power distribution terminal, characterized in that: The method comprises the following steps: Based on the peripheral environment where the backup power supply of the power distribution terminal is located, a dehumidifier is configured to adjust the ambient humidity, and a temperature control box or / and attached cooling materials are configured to adjust the ambient temperature; Based on the battery in the backup power supply of the distribution terminal, a power management module is configured on the designated monitoring host to perform online monitoring of the battery voltage, internal resistance and temperature, and online monitoring of the ambient humidity and ambient temperature, as well as further parameter setting and online monitoring of the battery floating charge, equalization charge and activation.

2. The method for managing the performance of backup power supply for distribution terminals according to claim 1, characterized in that: The temperature control box is composed of a bottom box and an upper cover; wherein, The bottom box is a semi-enclosed structure surrounded by a bottom wall and four side walls, and is used to accommodate the backup power supply of the distribution terminal; each side wall and the bottom wall are a three-layer structure formed by an outer layer, an intermediate layer and an inner layer, and each outer layer and each inner layer are injection molded by high temperature resistant and fireproof plastic, and each intermediate layer is filled with a heat insulating medium; The bottom box is provided with a controller and a temperature sensor, a cooling plate and / or a fan connected thereto on at least one side wall; wherein the controller is used to send a control instruction to the cooling plate and / or the fan to start cooling when it is determined that the temperature measured by the temperature sensor is greater than a set temperature; The upper cover is arranged directly above the bottom box and is provided with a vent hole for discharging the gas produced by the internal storage battery in the backup power supply of the power distribution terminal.

3. The method for managing the performance of backup power supply for distribution terminals according to claim 1, characterized in that: The cooling material is a film-type material with a four-layer structure; wherein, The thin film material includes a bottom layer, a second layer, a third layer and a top layer arranged in order from bottom to top; wherein the bottom layer is a metal polyethylene fluoride film layer; the second layer is a composite layer formed by doping polyethylene film with SiC nanoparticles; the third layer is a silicon oxide film layer with metal aluminum on the upper surface or a silicon nitride film layer with metal aluminum on the upper surface; and the top layer is an infrared emitting ethylene gas plate layer.

4. The method for managing the performance of backup power supply for distribution terminals according to claim 1, characterized in that: In the power management module, the parameters required to configure the battery float charge include the float charge voltage range and the corresponding change step, as well as the first boundary condition for triggering the battery float charge; wherein, The first boundary condition is that the voltage value output by the battery pack in the backup power supply of the power distribution terminal at a certain moment is within the floating charge voltage range.

5. The method for managing the performance of backup power supply for distribution terminals according to claim 1, characterized in that: In the power management module, the parameters required to configure the battery equalization charging include the equalization charging current range and the corresponding change step, the equalization charging voltage range and the corresponding change step, the second boundary condition for triggering the battery equalization charging, and the process parameters after the battery equalization charging is started; wherein, The second boundary condition is any one of the first to third conditions; wherein the first condition is that the output voltage value of the battery pack in the distribution terminal backup power supply after discharge is less than the first preset voltage value; the second condition is that the operation time of the distribution terminal backup power supply exceeds the first preset time threshold; the third condition is that the voltage difference between at least two battery cells in the distribution terminal backup power supply is greater than the second preset voltage value; The process parameters include a constant equalizing charging current value used in the constant current and voltage limited equalizing charging process, a constant equalizing charging voltage value used to enter the constant voltage and current limited equalizing charging process from the constant current and voltage limited equalizing charging process, and a floating charging current value used to enter the floating charging state from the constant voltage and current limited equalizing charging process; the equalizing charging current value is within the equalizing charging current range, and its value is 1 / 10 of the output current value of the battery pack in the backup power supply of the distribution terminal; the equalizing charging voltage value is within the equalizing charging voltage range; the floating charging current value is 1 / 100 of the output current value of the battery pack.

6. The method for managing the performance of backup power supply for distribution terminals according to claim 1, characterized in that: In the power management module, the parameters required to configure the battery activation include the third boundary condition for triggering battery activation, the number of activations, and the discharge activation process parameters; wherein, The third boundary condition is that the battery pack in the backup power supply of the power distribution terminal has been in service for a preset period of time; The activation times are determined by the service life of the battery pack; The discharge activation process parameters include an activation period and a corresponding change step, an activation completion voltage range and a corresponding change step, and a discharge time range and a corresponding change step.

7. The method for managing the performance of backup power supply for distribution terminals according to any one of claims 1 to 6, characterized in that: The battery cells in the battery pack are lithium iron phosphate batteries or sodium ion batteries.

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