CN219204170U - A low-temperature solar power storage system - Google Patents

Abstract

The utility model discloses a low-temperature solar power storage system, which comprises a solar cell, a storage battery group and a charging control module; the storage battery group includes a first storage battery and a second storage battery, and the first storage battery takes power from the solar battery. The second storage battery is provided with a power supply terminal; the charging control module is configured to control the second storage battery to take power from the first storage battery in response to ambient temperature. Realized the stable storage and discharge of solar power storage system in low temperature environment.

Description

A low-temperature solar power storage system

technical field

The utility model relates to the field of low-temperature power storage, in particular to a solar low-temperature power storage system, in particular to a solar low-temperature power storage system applied to a high-precision positioning system.

Background technique

Most of the high-precision equipment relying on power storage is installed in places with harsh environments, and often have low-temperature working environments. The solar energy storage and power supply for high-precision equipment usually faces two problems. One is the poor stability of solar energy charging to the battery, and the light collection efficiency of solar panels changes from time to time, which is greatly affected by climate factors, resulting in poor stability of the entire power system. This will further affect the working status of high-precision equipment; second, the cost of large-capacity low-temperature batteries is high. Usually, a high-precision detection terminal needs to be equipped with a low-temperature battery with a capacity of at least 100AH. Increase.

Utility model content

The technical problem to be solved by the utility model is: how to realize the stable power storage and discharge of the solar power storage system in a low temperature environment.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

In the first aspect, there is provided a solar low-temperature power storage system, including a solar cell, a storage battery pack, and a charging control module; the storage battery pack includes a first storage battery and a second storage battery, and the first storage battery takes power from the solar battery, The second storage battery is provided with a power supply terminal; the charging control module is configured to control the second storage battery to take power from the first storage battery in response to ambient temperature.

Further, the charging control module is further configured to control the second storage battery to take power from the first storage battery when the ambient temperature is greater than or equal to a preset temperature.

Further, the first battery is a low-temperature charge-discharge battery, the charging temperature is greater than or equal to a first minimum charging temperature, and the first minimum charging temperature is less than or equal to the preset temperature. Furthermore, the first minimum charging temperature is less than or equal to -30 degrees Celsius. Still further, the charging temperature range of the low-temperature charge-discharge battery is -30-70 degrees Celsius, and the discharge temperature range is -30-70 degrees Celsius.

Or, further, the second storage battery is a normal temperature charge low temperature discharge battery, the charging temperature is greater than or equal to the second minimum charging temperature, the second minimum charging temperature is greater than or equal to the preset temperature; the discharge temperature is greater than or equal to the first A minimum discharge temperature, the first minimum discharge temperature is less than or equal to the preset temperature. Furthermore, the second lowest charging temperature is greater than or equal to 0 degrees Celsius; further, the first lowest discharging temperature is less than or equal to 0 degrees Celsius. Still further, the charging temperature range of the normal-temperature charging and low-temperature discharging battery is 0-55 degrees Celsius, and the discharging temperature range is 0-55 degrees Celsius.

Specifically, the preset temperature is greater than or equal to 0 degrees Celsius and less than or equal to 5 degrees Celsius.

Further, the battery capacity of the first battery is less than or equal to 50% of the battery capacity of the battery pack.

Specifically, the battery capacity of the first battery is 5-50% of the battery capacity of the battery pack.

Specifically, the battery capacity of the first battery is 5AH, and the battery capacity of the battery pack is 100AH.

Further, a temperature sensor is also included for detecting the ambient temperature; the charging control module includes a charging management module and a switch controller, and the switch controller is configured to monitor the temperature sensor data and control the charging management in response to the ambient temperature module, the charging management module is configured to control the second storage battery to take power from the first storage battery.

In the second aspect, a solar low-temperature power storage system applied to a high-precision positioning system is further provided.

The beneficial effect of the utility model is that: in the technical solution of the utility model, the storage battery pack is divided into at least two parts, wherein the first storage battery takes power from the solar battery, and the second storage battery is provided with a power supply terminal to supply power to the electrical equipment, that is, to supply power to the battery The charging and discharging energy storage parts of the group are physically isolated to avoid the impact of unstable charging of solar cells on the back-end electrical equipment. storage and output stability.

Description of drawings

Fig. 1 shows a schematic diagram of a solar low-temperature power storage system according to an embodiment of the present invention.

Fig. 2 shows a flowchart of a control method of a solar low-temperature power storage system according to an embodiment of the present invention.

Fig. 3 shows a schematic diagram of a solar low-temperature power storage system according to another embodiment of the present invention.

Label description:

1. Solar cells;

2. Storage battery pack; 21. First storage battery; 22. Second storage battery;

3. Charging control module; 31. Charging management module; 32. Switch controller;

4. Temperature sensor;

Detailed ways

In order to describe the technical content, the achieved purpose and the effect of the present utility model in detail, the following will be described in conjunction with the embodiments and accompanying drawings.

Words such as "comprising" and "comprising" indicate that in addition to the units and steps that are directly and explicitly stated in the specification, the technical solution of the present utility model does not exclude other units and steps that are not directly or explicitly stated situation. Words such as "first" and "second" do not denote the order of elements in terms of time, space, size, etc. but are merely used to distinguish elements.

Please refer to Fig. 1, an embodiment of the utility model provides a low-temperature solar power storage system, including solar cells, a battery pack and a charging control module; the battery pack includes a first battery and a second battery, and the first battery is from The solar battery takes power, and the second storage battery is provided with a power supply terminal; the charging control module is configured to control the second storage battery to take power from the first storage battery in response to ambient temperature.

As can be seen from the above description, the beneficial effect of the utility model is that: in the technical solution of the utility model, the storage battery pack is divided into at least two parts, wherein the first storage battery takes power from the solar cell, and the second storage battery is provided with a power supply end as an electric device Power supply, that is, the physical isolation of the charging and discharging energy storage part of the battery pack, avoiding the impact of unstable charging of solar cells on the back-end electrical equipment, and at the same time, controlling the power from the second storage battery to the first storage battery , to further improve the storage and output stability of the battery pack.

A "solar cell" is generally understood as a device that converts light energy into electrical energy through the photoelectric effect, and its specific structure includes at least a solar panel that generates photovoltage, and does not necessarily include energy storage components.

"Battery" is generally understood as an electrical storage device that directly converts chemical energy into electrical energy, including but not limited to common secondary batteries, more specifically lithium-ion batteries, etc.

"Charging control module" is generally understood as a circuit module with charging control function, at least including the control of whether the battery is charged or the specific charging process according to the preset charging rule or battery charging characteristic curve.

Further, the charging control module is further configured to control the second storage battery to take power from the first storage battery when the ambient temperature is greater than or equal to a preset temperature.

As can be seen from the above description, in view of the poor charge and discharge performance of batteries in low temperature environments, in order to reduce the impact of charging temperature on the output stability of the power supply terminal, the charging control module is set to charge the second battery when the temperature is higher than the preset temperature. to charge.

Further, the first battery is a low-temperature charge-discharge battery, the charging temperature is greater than or equal to a first minimum charging temperature, and the first minimum charging temperature is less than or equal to the preset temperature. Furthermore, the first minimum charging temperature is less than or equal to -30 degrees Celsius. Still further, the charging temperature range of the low-temperature charge-discharge battery is -30-70 degrees Celsius, and the discharge temperature range is -30-70 degrees Celsius.

It can be seen from the above description that setting the first storage battery electrically connected to the solar cell as a low-temperature charge-discharge battery can avoid the problem of a sharp increase in cost caused by the use of low-temperature charge-discharge batteries for the entire battery pack, and at the same time ensure In a low temperature environment, it is ensured that the solar cell can efficiently charge the battery pack under low temperature conditions.

Or, further, the second storage battery is a normal temperature charge low temperature discharge battery, the charging temperature is greater than or equal to the second minimum charging temperature, the second minimum charging temperature is greater than or equal to the preset temperature; the discharge temperature is greater than or equal to the first A minimum discharge temperature, the first minimum discharge temperature is less than or equal to the preset temperature. Furthermore, the second lowest charging temperature is greater than or equal to 0 degrees Celsius; further, the first lowest discharging temperature is less than or equal to 0 degrees Celsius. Still further, the charging temperature range of the normal-temperature charging and low-temperature discharging battery is 0-55 degrees Celsius, and the discharging temperature range is 0-55 degrees Celsius.

It can be seen from the above description that the second storage battery electrically connected to the back-end electrical equipment is set as a low-temperature charging battery charged at room temperature. Since the cost of the low-temperature charging battery charged at room temperature is much lower than that of the low-temperature charging battery, it is avoided that the entire battery pack is charged at low temperature. The problem of a sharp increase in cost caused by the discharge of the battery, at the same time, its low-temperature discharge performance ensures stable output at low temperature, and it can be charged above the preset temperature to obtain stable power supplement.

Specifically, the preset temperature is greater than or equal to 0 degrees Celsius and less than or equal to 5 degrees Celsius.

It can be seen from the above description that under normal circumstances, the preset temperature is set to meet the requirements of solar panels to obtain relatively sufficient photoelectric conversion efficiency, low-temperature charging and discharging batteries to obtain relatively stable power storage, and normal temperature charging and low-temperature discharging batteries. Working under low temperature can improve the stability of the system. In particular, the reasonable selection of the preset temperature is helpful for the selection of batteries for normal temperature charging and low temperature discharging. Based on the working conditions and environment combined with the cost of low-temperature charging and discharging batteries at normal temperature, comprehensively determining the value of the preset temperature within the range of 0-5°C is a better condition for realizing some embodiments of the present invention. For example, the preset temperature can be a specific point value, for example, 0°C, 1°C, 2°C, 3°C, 4°C or 5°C; it can also be a range of values, for example, 0-5°C, 0-4°C, 1-5°C, 1-3°C, etc.

Further, the battery capacity of the first battery is less than or equal to 50% of the battery capacity of the battery pack.

It can be seen from the above description that in order to further reduce the cost of the storage battery pack and ensure that the capacity of the second storage battery participating in the direct power supply can meet the working requirements of the rear-end power-demanding equipment, in some embodiments of the utility model, the capacity of the first storage battery is less than or equal to that of the second storage battery. way of battery capacity.

Specifically, the battery capacity of the first battery is 5-50% of the battery capacity of the battery pack.

It can be seen from the above description that, compared with the battery capacity of the second battery, the battery capacity of the first battery can be appropriately reduced under actual working conditions. The design capacity considerations include but are not limited to the charging capacity of the solar battery, The chargeable electric quantity in one charging cycle, the power supply electric quantity of the second storage battery in one charging cycle, etc. After repeated tests by the inventor, the battery capacity of the first battery is finally selected to be 5-50% of the battery capacity of the battery pack, which can better meet most working conditions.

Specifically, the battery capacity of the first battery is 5AH, and the battery capacity of the battery pack is 100AH. That is, the battery capacity of the second storage battery may be 95AH. Because the low-temperature charge-discharge battery is a special application battery, the price is high, and the cost per AH capacity of the low-temperature charge-discharge battery is basically about 100 times the cost per AH capacity of the ordinary battery. In order to ensure at least 1 day of energy storage required by the load equipment, while taking into account the cost, the inventor finally selected the combination of the 5AH low-temperature charge-discharge battery and the 95AH room-temperature charge-low temperature discharge battery after repeated experiments.

Further, a temperature sensor is also included for detecting the ambient temperature; the charging control module includes a charging management module and a switch controller, and the switch controller is configured to monitor the temperature sensor data and control the charging management in response to the ambient temperature module, the charging management module is configured to control the second storage battery to take power from the first storage battery. Preferably, the charging management module is configured as a low dropout charging management solution.

In the second aspect, a solar low-temperature power storage system applied to a high-precision positioning system is further provided.

The above-mentioned low-temperature solar power storage system of the utility model is described in the following specific implementation modes:

Embodiment one

Please refer to Figures 1 and 2. This embodiment provides a preferred implementation of a solar low-temperature power storage system, including a solar cell 1, a storage battery pack 2, and a charging control module 3; the storage battery pack 2 includes a first storage battery 21 and a second storage battery 21. Battery 22.

The first storage battery 21 takes power from the solar cell 1 , that is, stores the electric energy formed by the solar cell 1 through conversion of received sunlight into the first storage battery 21 . The second storage battery 22 is provided with a power supply terminal (not shown in the figure). The power supply end is used for electrical connection with the back-end power-demanding equipment to provide electric energy therefor. The charging control module 3 is configured to control the second storage battery 22 to take power from the first storage battery 21 in response to the ambient temperature. Preferably, the charging control module is further configured to control the second storage battery to take power from the first storage battery when the ambient temperature is greater than or equal to a preset temperature. Specifically, in this embodiment, the preset temperature is set to all integer values within the numerical range of 0-5°C. In this solution, the temperature sensor 4 is used to obtain the ambient temperature, and the corresponding temperature signal is transmitted to the charging control module to control whether the first storage battery supplies power to the second storage battery.

Preferably, the first battery 21 is a low-temperature charge-discharge battery, the charging temperature is greater than or equal to a first minimum charging temperature, and the first minimum charging temperature is less than or equal to a preset temperature. Specifically, the charging temperature range of the low-temperature charge-discharge battery is -30°C to 70°C, and the discharge temperature range is -30°C to 70°C. Preferably, the second storage battery is a low temperature discharge battery charged at normal temperature, the charging temperature is greater than or equal to the second minimum charging temperature, and the second minimum charging temperature is greater than or equal to the preset temperature; the discharge temperature is greater than or equal to the first minimum discharge temperature, and the first minimum The discharge temperature is less than or equal to the preset temperature. Specifically, the charge temperature range of the normal temperature charge and low temperature discharge battery is 0-55 degrees Celsius, and the discharge temperature range is 0-55 degrees Celsius.

In this embodiment, the battery capacity of the first battery 21 is selected as 5AH, the battery capacity of the battery pack 1 is 100AH, and the battery capacity of the second battery 22 is selected as 95AH.

In addition, the solar low-temperature power storage system of the above scheme is applied to a high-precision positioning system as a power supply device.

In this solution, the first aspect solves the problem of battery charging and discharging of high-precision positioning equipment in low-temperature environments. When the ambient temperature is low, the 5AH low-temperature charging and discharging battery is used for energy storage. The power of the charging and discharging battery is transferred to the 95AH normal temperature charging and low temperature discharging battery for storage. Solve the system maximum 100AH energy storage, which can ensure the normal operation of the equipment in continuous rainy days.

The second aspect solves the problem of high price of low-temperature charge-discharge batteries. The design cost of 100AH low-temperature charge-discharge batteries is extremely high, which is not conducive to commercial promotion. Using 5AH low-temperature charge-discharge batteries and 95AH normal-temperature charge-discharge batteries for replacement can greatly reduce cost.

In the third aspect, all the power supply of the system is taken from 95AH normal temperature charging and low temperature discharging batteries. Since the charging of 95AH normal-temperature charging and low-temperature discharging batteries is supplied by 5AH low-temperature charging and discharging batteries, the voltage is stable, and the unstable factors of high and low charging voltage caused by natural factors such as cloud cover during the solar charging process are avoided.

Embodiment two

Please refer to FIG. 3 , this embodiment provides a preferred implementation of a solar low-temperature power storage system, including a solar cell 1, a storage battery pack 2 and a charging control module 3; the storage battery pack 2 includes a first storage battery 21 and a second storage battery 22 . The charging control module 3 specifically includes a charging management module 31 and a switch controller 32 . The temperature sensor 4 is used to obtain the ambient temperature, and the switch controller 32 monitors the temperature sensor 4 to obtain ambient temperature data. At the same time, the switch controller 32 opens or closes the charging management module 31 according to the ambient temperature value, so as to realize charging from the first storage battery 21 to the second storage battery 22. charging control.

To sum up, the solar low-temperature power storage system provided by the utility model divides the solar charging side and the battery discharging side into two relatively independent controllable parts by physically dividing the battery pack and according to the operating temperature. Small cost realizes stable low-temperature charging and storage. On the other hand, stable power supply is realized with large-capacity normal-temperature charging and low-temperature discharging batteries.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent transformations made by using the utility model specification and accompanying drawings, or directly or indirectly used in related technical fields, are all the same. The theory is included in the patent protection scope of the present utility model.

Claims (8)

1. The solar low-temperature power storage system is characterized by comprising a solar battery, a storage battery pack and a charging control module; the storage battery pack comprises a first storage battery and a second storage battery, the first storage battery takes electricity from the solar battery, and the second storage battery is provided with a power supply end; the charge control module is configured to control the second battery to draw power from the first battery in response to an ambient temperature;

the first storage battery is a low-temperature charging and discharging battery, the charging temperature is greater than or equal to a first minimum charging temperature, and the first minimum charging temperature is less than or equal to a preset temperature;

the second storage battery is a normal-temperature charging low-temperature discharging battery, the charging temperature is greater than or equal to a second lowest charging temperature, and the second lowest charging temperature is greater than or equal to the preset temperature; the discharge temperature is greater than or equal to a first minimum discharge temperature, which is less than or equal to the preset temperature.

2. The solar cryogenic power storage system of claim 1, wherein the charge control module is further configured to control the second battery to draw power from the first battery when the ambient temperature is greater than or equal to a preset temperature.

3. The solar low-temperature electrical storage system according to claim 2, wherein the preset temperature is 0 degrees celsius or more and 5 degrees celsius or less.

4. The solar low-temperature power storage system according to any one of claims 1 to 3, wherein a battery capacity of the first storage battery is 50% or less of a battery capacity of the battery pack.

5. The solar cryogenic power storage system of claim 4, wherein the battery capacity of the first battery is 5-50% of the battery capacity of the battery pack.

6. The solar low-temperature power storage system according to claim 4, wherein the battery capacity of the first battery is 5AH and the battery capacity of the battery pack is 100AH.

7. The solar low-temperature electrical storage system according to any one of claims 1 to 3, 5, and 6, further comprising a temperature sensor for detecting the ambient temperature; the charge control module includes a charge management module and a switch controller configured to monitor temperature sensor data and control the charge management module in response to an ambient temperature, the charge management module configured to control the second battery to draw power from the first battery.

8. A solar low-temperature electric power storage system applied to a high-precision positioning system, characterized in that the solar low-temperature electric power storage system is the solar low-temperature electric power storage system according to any one of claims 1 to 7.

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