CN107394841A - A kind of storage device and its standby electric method for charging batteries and control device - Google Patents

Abstract

The present invention provides a storage device and its backup battery charging method and control device. When the backup battery is in the charging state, it is first judged whether the battery core temperature sampling value of the backup battery is greater than a preset threshold; if the battery core temperature If the sampling value is greater than the preset threshold, the cooling fan of the backup battery is controlled to increase the speed of rotation to reduce the ambient temperature of the backup battery, so that the backup battery can dissipate heat better, thereby reducing the temperature of its battery core. At the same time, by judging whether the time period during which the battery core temperature sampling value is greater than the preset threshold exceeds the preset time period, the control effect of reducing the ambient temperature on reducing the battery core temperature is obtained; if the battery core temperature sampling value is greater than the predetermined If the duration of the threshold exceeds the preset duration, it means that the heat dissipation capacity of the external environment cannot effectively control the temperature of the battery core. At this time, the charging current of the backup battery is controlled to decrease to reduce the temperature of the battery core and prevent the temperature of the battery core. Overheating will affect the life of the backup battery.

Description

A storage device and its backup battery charging method and control device

technical field

The invention relates to the technical field of power electronics, in particular to a storage device and a backup battery charging method and control device thereof.

Background technique

In the prior art, regarding the design of the power supply architecture of the storage device, the problem of data preservation in case of an unexpected power outage of the power grid is generally taken into consideration. For example, when the power grid fails, the grid power supply can be switched to the backup battery power supply to complete the data storage work of the storage device. When the power grid is restored, the backup battery will receive power from the grid for charging to meet the next backup power demand.

However, during the charging process of the backup battery, affected by its own characteristics, the magnitude of the charging current and the external heat dissipation environment, its battery core will generate more heat. In particular, when the charging current is too large and the external heat dissipation environment is poor, the battery core heats up more seriously; when the battery core overheats, it will have a serious impact on the service life of the battery.

Contents of the invention

The invention provides a storage device and its backup battery charging method and control device to solve the problem in the prior art that the service life of the backup battery is affected due to overheating of the battery core during charging.

In order to achieve the above object, the technical scheme provided by the application is as follows:

A method for charging a backup battery of a storage device, applied to a control device of a storage device, the method for charging a backup battery of a storage device includes:

Judging whether the battery core temperature sampling value of the backup battery is greater than the preset threshold;

If the temperature sampling value of the battery core is greater than the preset threshold, control the speed of the cooling fan of the backup battery to increase;

judging whether the time period during which the sampled value of the battery core temperature is greater than the preset threshold exceeds a preset time period;

If the time period in which the temperature sampling value of the battery core is greater than the preset threshold exceeds the preset time period, the charging current of the backup battery is controlled to decrease.

Preferably, the control of increasing the speed of the cooling fan of the backup battery includes:

calculating the difference between the sampled value of the battery core temperature minus the preset threshold;

The difference is adjusted by PID to control the speed of the cooling fan to increase.

Preferably, after the determination of whether the battery core temperature sampling value of the backup battery is greater than a preset threshold, the method further includes:

If the sampled value of the battery core temperature is less than or equal to the preset threshold, the cooling fan is controlled to rotate at a preset speed.

Preferably, before said judging whether the battery core temperature sampling value of the backup battery is greater than a preset threshold, it also includes:

The backup battery is controlled to be charged with the maximum current allowed by the battery core.

A control device for a storage device, comprising:

The first judging unit is used to judge whether the sampled value of the cell temperature of the backup battery is greater than a preset threshold;

A first control unit, configured to control the speed of the cooling fan of the backup battery to increase if the sampled value of the battery core temperature is greater than the preset threshold;

A second judging unit, configured to judge whether the time period during which the sampled value of the battery core temperature is greater than the preset threshold exceeds a preset time period;

The second control unit is configured to control the charging current of the backup battery to decrease if the time period in which the temperature sampled value of the battery core is greater than the preset threshold exceeds the preset time period.

Preferably, the first control unit includes:

A calculation module, configured to calculate the difference between the sampled value of the battery core temperature and the preset threshold;

The PID controller is used to perform PID adjustment on the difference to control the speed increase of the cooling fan.

Preferably, the first control unit is also used for:

If the sampled value of the battery core temperature is less than or equal to the preset threshold, the cooling fan is controlled to rotate at a preset speed.

Preferably, the second control unit is also used for:

Before the first judging unit judges whether the sampled value of the cell temperature of the backup battery is greater than a preset threshold, the backup battery is controlled to be charged with the maximum current allowed by the cell.

A storage device comprising:

Main circuit for data storage;

A backup battery, used for providing backup power supply for the main circuit to save data when the grid is powered off;

A control device for any of the storage devices described above;

The charging and discharging circuit is used to make the backup battery discharge according to the control of the control device when the grid is powered off, and to charge the backup battery according to the control of the control device after the grid is powered off and restored.

Preferably, it also includes:

A battery core temperature sensor, configured to detect the battery core temperature of the backup battery, generate a battery core temperature sampling value, and send it to the control device of the storage device;

The ambient temperature sensor is used to detect the ambient temperature of the backup battery, generate a sampled value of the ambient temperature, and send it to the control device of the storage device.

The backup battery charging method of the storage device provided by the present invention first judges whether the battery core temperature sampling value of the backup battery is greater than a preset threshold when the backup battery is in a charging state; if the battery core temperature sampling value is greater than The preset threshold value controls the speed of the heat dissipation fan of the backup battery to increase to reduce the ambient temperature of the backup battery, so that the backup battery can dissipate heat better, thereby reducing the temperature of its battery core. At the same time, by judging whether the time period during which the battery core temperature sampling value is greater than the preset threshold exceeds the preset time period, the control effect of reducing the ambient temperature on reducing the battery core temperature is obtained; if the battery core temperature sampling value is greater than the predetermined If the duration of the threshold exceeds the preset duration, it means that the heat dissipation capacity of the external environment cannot effectively control the temperature of the battery core. At this time, the charging current of the backup battery is controlled to decrease to reduce the temperature of the battery core and prevent the temperature of the battery core. Overheating will affect the life of the backup battery.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flowchart of a method for charging a backup battery of a storage device according to an embodiment of the present invention;

2 is a flowchart of a method for charging a backup battery of a storage device according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a control device for a storage device provided by another embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a control device for a storage device provided by another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a storage device provided by another embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a storage device provided by another embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The invention provides a backup battery charging method of a storage device to solve the problem in the prior art that the service life of the backup battery is affected due to overheating of the battery core during charging.

The backup battery charging method of the storage device is applied to the control device of the storage device; specifically, referring to FIG. 1, the backup battery charging method of the storage device includes:

S101. Determine whether the sampled value of the cell temperature of the backup battery is greater than a preset threshold;

In a specific practical application, the battery core temperature of the backup battery can be detected by the battery core temperature sensor, and the battery core temperature sampling value T2 is generated, and sent to the control device of the storage device, and the preset threshold value T1 in the control device Make comparative judgments.

If T2≤T1, it is enough to control the normal charging of the backup battery and the cooling fan to rotate at a preset speed; the preset speed can be set according to the specific application environment, such as zero, that is, when the battery cell of the backup battery When the temperature is within the normal range, the cooling fan can be controlled to stop rotating; of course, the preset rotating speed can also be other values, which are not specifically limited here, and are within the protection scope of the present application. And if T2>T1, execute step S102;

S102, controlling the speed of the cooling fan of the backup battery to increase;

When T2>T1, the speed of the cooling fan in the external environment can be increased first to accelerate the heat dissipation of the external environment, so that the temperature of the battery core can gradually approach the preset threshold T1.

Preferably, as shown in FIG. 2, step S102 may specifically include:

S201. Calculate and obtain the difference T2-T1 of the sampled value of the battery core temperature minus the preset threshold;

S202. Perform PID adjustment on the difference T2-T1 to control the speed of the cooling fan to increase.

By performing PID adjustment on the difference T2-T1, the speed of the cooling fan can be related to the temperature of the battery core. The fan rotates at 80% of the normal speed, and when the temperature of the battery core is too high by 2°C, the cooling fan can be set to rotate at 90% of the normal speed, and so on; this is just an example , is not necessarily limited thereto, and may also depend on its specific application environment, all of which are within the protection scope of the present application.

In a specific practical application, the speed control of the cooling fan is not necessarily obtained only through the PID adjustment of the difference T2-T1, but also depends on the specific application environment, all of which are within the protection scope of the present application.

S103, judging whether the time period during which the battery core temperature sampling value is greater than the preset threshold exceeds the preset time period;

In general, if T2>T1, after going through step S102, with the improvement of the heat dissipation capacity of the external environment, the temperature of the battery core should gradually drop, and then tend to the preset threshold T1; in special cases, such as the characteristics of the backup battery change , or the ambient temperature is too high, after step S102, the rising trend of the battery core temperature has not been alleviated, or the rate of decline is too small, resulting in the maintenance of T2>T1 exceeding the preset time, then further measures are required Measures to ensure effective control of battery core temperature.

That is, if the time period for which the battery core temperature sampling value is greater than the preset threshold exceeds the preset time period, step S104 is executed;

S104. Control the charging current of the backup battery to decrease.

At the beginning of the power grid recovery, the control device can start to control the backup battery to charge; during the charging process, if the temperature of the battery core cannot be reduced by improving the environmental cooling capacity, it can be realized by reducing the charging current Effective control of battery core temperature.

In addition, on the basis of FIG. 1, preferably, as shown in FIG. 2, before step S101, it also includes:

S100. Control the backup battery to be charged with the maximum current allowed by the battery core.

For the charging process of the backup battery, it can be divided into two parts: constant current charging and constant voltage charging. These two parts are determined by the characteristics of the battery; during constant current charging, the temperature of the battery core is relatively high. Therefore, the backup battery charging method of the storage device provided in this embodiment firstly controls the backup battery to be charged with the maximum current allowed by the battery core, and continuously detects the temperature of the battery core; When the sampling value exceeds the preset value, the method of accelerating the heat dissipation of the external environment is first used to dissipate heat, so that the temperature of the battery core can be maintained at a predetermined temperature. If the battery core temperature remains high, the battery core temperature can be maintained within a predetermined range by reducing the charging current.

The backup battery charging method of the storage device provided in this embodiment includes two closed-loop controls. When the sampled value of the battery core temperature is greater than a preset threshold, the inner loop controls the cooling fan of the backup battery to increase the speed to reduce the The ambient temperature of the backup battery enables the backup battery to dissipate heat better, thereby reducing the temperature of its battery core. And, by judging whether the time when the battery core temperature sampling value is greater than the preset threshold exceeds the preset time length, the control effect of reducing the ambient temperature on reducing the battery core temperature is obtained; , it means that the heat dissipation capacity of the external environment can no longer effectively control the temperature of the battery core. At this time, the charging current of the backup battery can be controlled to decrease through the outer loop to reduce the temperature of the battery core and prevent the overheating of the battery core from affecting the life of the backup battery. .

Another embodiment of the present invention also provides a control device for a storage device, as shown in FIG. 3 , including:

The first judging unit 101 is configured to judge whether the sampled value of the battery core temperature of the backup battery is greater than a preset threshold;

The first control unit 102 is configured to control the speed of the cooling fan of the backup battery to increase if the sampled value of the battery core temperature is greater than a preset threshold;

The second judging unit 103 is configured to judge whether the time period during which the battery core temperature sampling value is greater than a preset threshold exceeds a preset time period;

The second control unit 104 is configured to control the charging current of the backup battery to decrease if the time period for which the sampled value of the battery core temperature is greater than the preset threshold exceeds the preset time period.

Preferably, referring to FIG. 4, the first control unit 102 includes:

Calculation module 201, configured to calculate the difference between the sampled value of the battery core temperature minus the preset threshold;

The PID controller 202 is configured to perform PID adjustment on the difference, so as to control the speed of the cooling fan to increase.

Preferably, the second control unit 104 is also used for:

Before the first judging unit 101 judges whether the sampled value of the cell temperature of the backup battery is greater than a preset threshold, the backup battery is controlled to be charged with the maximum current allowed by the battery cell.

The specific working principles are the same as those of the above-mentioned embodiments, and will not be repeated here.

It is worth noting that in specific practical applications, the control device of the storage device can be realized by a single-chip microcomputer or an integrated control chip; and it should also include the receiving and processing function of the battery core temperature sampling value, and this part can be converted through analog to digital device, but is not limited thereto, and may also be determined depending on the specific environment, all within the scope of protection of the present application.

Another embodiment of the present invention also provides a storage device, see FIG. 5, including:

The main circuit 400 is used for data storage;

The backup battery 200 is used to provide backup power supply for data storage to the main circuit 300 when the grid is powered off;

The control apparatus 100 of the storage device in any of the above-mentioned embodiments;

The charging and discharging circuit 300 is used to discharge the backup battery 200 according to the control of the control device 100 when the power grid is powered off, and to charge the backup battery 200 according to the control of the control device 100 after the power grid is restored.

Preferably, referring to Figure 6, the storage device further includes:

The battery core temperature sensor 500 is used to detect the battery core temperature of the backup battery 200, generate a battery core temperature sample value, and send it to the control device 100 of the storage device.

Preferably, referring to Figure 6, the storage device further includes:

The ambient temperature sensor 600 is used to detect the ambient temperature of the backup battery 200, generate a sampled value of the ambient temperature, and send it to the control device 100 of the storage device.

The specific working principles are the same as those of the above-mentioned embodiments, and will not be repeated here.

Each embodiment of the present invention is described in a progressive manner, each embodiment focuses on the differences from other embodiments, and the same and similar parts of the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the methods and technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent of equivalent change Example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, which do not deviate from the technical solution of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. the standby electric method for charging batteries of a kind of storage device, it is characterised in that described applied to the control device of storage device The standby electric method for charging batteries of storage device includes：

Judge whether the battery temperature sampling value of standby battery is more than predetermined threshold value；

If the battery temperature sampling value is more than the predetermined threshold value, the rotating speed of the radiator fan of the standby battery is controlled Rise；

Judge whether the battery temperature sampling value exceedes preset duration more than the duration of the predetermined threshold value；

If the duration that the battery temperature sampling value is more than the predetermined threshold value exceedes the preset duration, control described standby The charging current of battery reduces.

2. the standby electric method for charging batteries of storage device according to claim 1, it is characterised in that the control is described standby The rotating speed rise of the radiator fan of battery, including：

The difference that the battery temperature sampling value subtracts the predetermined threshold value is calculated；

The difference is subjected to PID regulations, to control the rotating speed of the radiator fan to raise.

3. the standby electric method for charging batteries of storage device according to claim 1, it is characterised in that judge standby electricity described Whether the battery temperature sampling value of battery is more than after predetermined threshold value, in addition to：

If the battery temperature sampling value is less than or equal to the predetermined threshold value, the radiator fan is controlled to enter with preset rotation speed Row rotates.

4. the standby electric method for charging batteries of storage device according to any one of claims 1 to 3, it is characterised in that described Judge whether the battery temperature sampling value of standby battery is more than before predetermined threshold value, in addition to：

The maximum current that control the standby battery is allowed with battery is charged.

A kind of 5. control device of storage device, it is characterised in that including：

First judging unit, for judging whether the battery temperature sampling value of standby battery is more than predetermined threshold value；

First control unit, if being more than the predetermined threshold value for the battery temperature sampling value, control the standby electricity electricity The rotating speed rise of the radiator fan in pond；

Second judging unit, for judging that whether the battery temperature sampling value is more than the duration of the predetermined threshold value more than pre- If duration；

Second control unit, if the duration for being more than the predetermined threshold value for the battery temperature sampling value exceedes described preset Duration, then the charging current of the standby battery is controlled to reduce.

6. the control device of storage device according to claim 5, it is characterised in that first control unit includes：

Computing module, the difference of the predetermined threshold value is subtracted for the battery temperature sampling value to be calculated；

PID controller, for the difference to be carried out into PID regulations, to control the rotating speed of the radiator fan to raise.

7. the control device of storage device according to claim 5, it is characterised in that first control unit is also used In：

If the battery temperature sampling value is less than or equal to the predetermined threshold value, the radiator fan is controlled to enter with preset rotation speed Row rotates.

8. according to the control device of any described storage device of claim 5 to 7, it is characterised in that second control is single Member is additionally operable to：

Before first judging unit judges whether the battery temperature sampling value of standby battery is more than predetermined threshold value, control The maximum current that the standby battery is allowed with battery is charged.

A kind of 9. storage device, it is characterised in that including：

Main circuit, for carrying out data storage；

Standby battery, provides the stand-by power supply of data preservation work during for electric network power-fail for the main circuit；

The control device of any described storage device of claim 5 to 8；

Charge-discharge circuit, for making the standby battery be discharged in electric network power-fail according to the control of the control device, And charged after electric network power-fail recovery according to the control of the control device.

10. storage device according to claim 9, it is characterised in that also include：

Battery temperature sensor, for being detected to the battery temperature of the standby battery, generation battery temperature is adopted Sample value, and send to the control device of the storage device；

Environment temperature sensor, for being detected to the environment temperature of the standby battery, build environment temperature sampling value, and Send to the control device of the storage device.