CN117977734A - Charging system, voltage control device and voltage control method thereof - Google Patents

Abstract

The invention discloses a charging system, a voltage control device and a voltage control method thereof. The charging device is used for charging the battery module to a specific voltage at constant current-constant voltage when the voltage of the battery module is low to a recharging voltage. The voltage control device comprises a temperature sensor, a voltage sensor, a timer and a controller, wherein the temperature sensor is used for detecting the temperature of the battery module, and the voltage sensor is used for detecting the voltage. The timer is used for counting the accumulated time accumulated by different temperatures when the upper voltage limit of the battery module is set at a specific voltage. The controller is used for setting a specific threshold and notifying the charging device to increase the specific voltage or the recharging voltage based on the accumulated time reaching the specific threshold.

Description

Charging system, voltage control device and voltage control method thereof

Technical Field

The present invention relates to a charging system, a voltage control device and a voltage control method thereof, and more particularly, to a charging system, a voltage control device and a voltage control method thereof capable of prolonging the service life of an uninterruptible power system.

Background

Please refer to fig. 1A, which is a block diagram of a conventional uninterruptible power system. Uninterruptible power system 100, for example and without limitation, may be a backup battery unit (Backup Battery Unit; BBU) or uninterruptible power device (Uninterruptible Power Supply; UPS), typically used to power a backup source, for example and without limitation, data center 200 (DATA CENTER). The standby power supply mode is mainly to charge the battery module 100-1 when the main power supply is normal, so as to store the standby power in the battery module 100-1 in advance. When the main power supply is powered off, the uninterruptible power system 100 can convert the electric quantity stored by the battery module 100-1 into electric power required by the operation of the data center 200 to provide a function of supplying power from a standby source. However, some uninterruptible power systems 100 require strict discharge time and have limited space (e.g., uninterruptible power system 100 for data center 200 requires sufficient capacity to support the completion of backup when the main power supply is disconnected from battery module 100-1).

Fig. 1B is a schematic diagram showing the power supply capability of a battery module of the uninterruptible power system after several years of use, and fig. 1A is repeated. However, the longer the storage time, the more the battery cells of the internal battery of the battery module 100-1 are, the less the storage capacity is and the impedance is increased, resulting in a gradual decrease in the operation time (run time) of the battery module 100-1. The operation time refers to how much time the uninterruptible power system 100 can provide power to its connected devices (i.e., the data center 200) when power is interrupted. Thus, in fig. 1B, the battery Capacity (Capacity) of the battery module 100-1 after 4 years is obviously insufficient, and the operation time is too short (less than 4 minutes), which does not meet the minimum specification of the battery module 100-1 (i.e., the operation time is less than 4 minutes), and the battery module 100-1 must be out of service.

Therefore, how to design a charging system, a voltage control device and a voltage control method thereof for prolonging the service life of the uninterruptible power system so as to meet the requirement of the battery module inside the uninterruptible power system to meet the operation time specification as much as possible within the service life is a big subject to be studied by the inventor.

Disclosure of Invention

In order to solve the above-mentioned problems, the present invention provides a charging system with a prolonged service life of uninterruptible power systems to overcome the problems of the prior art.

Therefore, the charging system is electrically connected with the battery module of the uninterruptible power system, and comprises a charging device and a voltage control device. The charging device comprises a charging end and a communication end, wherein the charging end is used for electrically connecting the battery module, and when the voltage of the battery module is low to a recharging voltage, the battery module is charged to a specific voltage by constant current and constant voltage. The voltage control device comprises a temperature sensor, a voltage sensor, a timer and a controller. The temperature sensor is configured on the battery module and is used for detecting the temperature of the battery module. The voltage sensor is electrically connected with the battery module and is used for detecting voltage. The timer is used for counting the accumulated time accumulated by different temperatures when the upper voltage limit of the battery module is set at a specific voltage. The controller is electrically connected with the communication end, the temperature sensor, the voltage sensor and the timer and is used for setting a specific threshold. The controller notifies the charging device to increase the specific voltage or the recharging voltage through the communication terminal based on the accumulated time reaching the specific threshold.

The controller informs the charging device to charge the battery module with the constant current-constant voltage through the communication terminal based on the voltage being lower than the recharging voltage, so as to charge the voltage to the specific voltage.

Wherein, this voltage control device still includes: the current sensor is electrically connected between the battery module and the charging end and is used for detecting a current of the charging device for charging the battery module.

The controller calculates battery aging experimental data of the battery module through an operation time algorithm to obtain a basic parameter, and the basic parameter is customized and adjusted to generate the specific threshold.

Wherein the temperature is inversely related to the accumulated time.

The controller predicts an operation time of the battery module based on the accumulated time and determines whether the operation time can be maintained at a minimum specification.

In order to solve the above-mentioned problems, the present invention provides a voltage control device with a function of prolonging the lifetime of a power-down system, so as to overcome the problems of the prior art.

Therefore, the voltage control device is electrically connected between the battery module of the uninterruptible power system and the charging device and comprises a temperature sensor, a voltage sensor, a timer and a controller. The temperature sensor is configured on the battery module and is used for detecting the temperature of the battery module. The voltage sensor is electrically connected with the battery module and is used for detecting voltage. The timer is used for counting the accumulated time accumulated by different temperatures when the upper voltage limit of the battery module is set at a specific voltage. The controller is electrically connected with the charging device, the temperature sensor, the voltage sensor and the timer and is used for setting a specific threshold. The controller notifies the charging device to raise a specific voltage or recharge voltage based on the accumulated time reaching a specific threshold.

The controller informs the charging device to charge the battery module with a constant current-constant voltage based on the voltage being lower than the recharging voltage, so as to charge the voltage to the specific voltage.

Wherein, include: and the current sensor is electrically connected between the battery module and the charging device and is used for detecting a current of the charging device for charging the battery module.

The controller calculates battery aging experimental data of the battery module through an operation time algorithm to obtain a basic parameter, and the basic parameter is customized and adjusted to generate the specific threshold.

Wherein the temperature is inversely related to an operating time of the battery module.

The controller predicts an operation time of the battery module based on the accumulated time and determines whether the operation time can be maintained at a minimum specification.

In order to solve the above-mentioned problems, the present invention provides a voltage control method for prolonging the lifetime of a power-down system, so as to overcome the problems of the prior art.

Therefore, the voltage control method of the invention is electrically connected between the battery module of the uninterruptible power system and the charging device through the voltage control device, and the voltage control method comprises the following steps: (a) setting a specific threshold and recharging voltage. (b) When the voltage of the battery module is low to the recharging voltage, the battery module is charged to a specific voltage with constant current-constant voltage. (c) detecting the temperature of the battery module. (d) When the upper voltage limit of the battery module is set at a specific voltage, the accumulated time of different temperatures is counted. (e) The charging device is notified to turn up a specific voltage or a recharging voltage based on the accumulated time reaching a specific threshold.

Wherein the method further comprises the following steps: an operating time of the battery module is predicted based on the accumulated time, and it is determined whether the operating time can be maintained at a minimum specification.

Wherein the method further comprises the following steps: calculating battery aging experimental data of the battery module through an operation time algorithm to obtain a basic parameter; and the basic parameter is customized and adjusted to generate the specific threshold; wherein the temperature is inversely related to the accumulated time.

Wherein the method further comprises the following steps: detecting the voltage; and notifying the charging device to charge the battery module at the constant current-constant voltage based on the voltage being lower than the recharging voltage, so as to charge the voltage to the specific voltage.

Wherein the method further comprises the following steps: detecting a current of the charging device for charging the battery module.

The main purpose and effect of the invention is that when the service life of the battery module in the uninterruptible power system is short, the controller informs the charging device to charge the battery module with a lower specific voltage, and when the service life of the battery module is gradually prolonged, the controller informs the charging device to adjust the specific voltage or the recharging voltage again, so as to achieve the effect of meeting the operation time specification in the service life as far as possible.

For a further understanding of the technology, means, and efficacy of the present invention, reference should be made to the following detailed description of the invention and to the accompanying drawings, which are included to provide a further understanding of the invention, and to the features and aspects of the invention, however, are given by way of illustration and not limitation.

Drawings

FIG. 1A is a circuit block diagram of a prior art uninterruptible power system;

FIG. 1B is a schematic diagram of the power supply capability of a battery module of an uninterruptible power system after years of use;

FIG. 2 is a circuit block diagram of a charging system with an extended uninterruptible power system life of the present invention;

FIG. 3A is a graph showing the capacity recovery rate of the charging system of the present invention at different temperatures and the same voltage;

FIG. 3B is a graph showing the rate of increase of the internal resistance of the charging system according to the present invention at different temperatures and the same voltage;

FIG. 3C is a graph showing capacity recovery rate of the charging system of the present invention at the same temperature and different voltages;

FIG. 3D is a graph showing the rate of increase of the internal resistance of the charging system according to the present invention at the same temperature and different voltages;

FIG. 4A is a schematic diagram of a charging strategy of a charging system with an increased lifetime of the uninterruptible power system according to the present invention;

FIG. 4B is a schematic diagram of a voltage regulation scheme of a first embodiment of the present invention with extended life of the uninterruptible power system;

FIG. 4C is a schematic diagram showing the power supply capability of the battery module of the uninterruptible power supply system of the invention after several years of use;

FIG. 5 is a flow chart illustrating a specific threshold parameter setting of the charging system according to the present invention;

FIG. 6 is a flow chart of a method for controlling voltage of a charging system with an increased lifetime of the uninterruptible power system; and

FIG. 7 is a schematic diagram of a voltage regulation scheme of a second embodiment of the present invention with extended life of the uninterruptible power system.

Wherein, the reference numerals:

100 … uninterruptible power system

100-1 … Battery module

200 … Data center

300 … Charging system

1 … Charging device

12 … Charging terminal

14 … Communication terminal

2 … Voltage control device

22 … Temperature sensor

24 … Voltage sensor

26 … Timer

28 … Controller

30 … Current sensor

32 … Memory module

St … temperature signal

Sv … voltage signal

Voltage of Vb …

Vs … specific voltage

Vre … recharge voltage

Ve … discharge termination voltage

RT … run time

(S100) - (S280) … steps

Detailed Description

The technical content and detailed description of the present invention are described below with reference to the drawings:

Fig. 2 is a circuit block diagram of a charging system with a prolonged service life of an uninterruptible power supply according to the present invention, and fig. 1A-1B are combined. The charging system 300 is electrically connected to the battery module 100-1 of the uninterruptible power system 100, and is used for performing charging control on the battery module 100-1 to adjust the voltage level for charging the battery module 100-1 based on the usage status of the battery module 100-1. Specifically, the charging system 300 includes a charging device 1 and a voltage control device 2. The charging system 300 is generally configured with the uninterruptible power system 100 and the data center 200 to form a complete cloud device, and the uninterruptible power system 100 generally includes a plurality of ac/dc converters. That is, the charging system 300 may be a unidirectional or bidirectional power converter, and may be a dc/dc converter in the uninterruptible power system 100 or an ac/dc converter disposed outside the uninterruptible power system 100.

The charging device 1 includes a charging terminal 12 and a communication terminal 14, and the charging terminal 12 is electrically connected to the battery module 100-1. When the battery module 100-1 is new or the amount of electricity stored in the battery module 100-1 is too low, the charging device 1 generally charges the battery module 100-1 in a constant current charging manner to charge the battery module 100-1 to a specific amount of electricity (typically 70-80% of the full charge can be set). Then, the charging device 1 charges the battery module 100-1 to a full charge by constant current-constant voltage (CC-CV) charging, and then stops the charging. Finally, when the electric quantity of the battery module 100-1 is reduced to the default recharging voltage (Recharge voltage) due to natural internal consumption, the battery module 100-1 is charged in a constant-current-constant-voltage charging mode, so as to maintain the electric quantity of the battery module 100-1 between the full electric quantity and the recharging voltage. In the battery module 100-1, since the degradation speed of the battery module 100-1 is closely related to the stored electricity and the temperature, it is generally difficult to make the battery module 100-1 meet the operating time standard in the service life in the above-mentioned charging manner, and the specific voltage control manner of the present application must be used to make the battery module 100-1 meet the operating time standard as will be further described below.

The voltage control device 2 is electrically connected between the charging device 1 and the battery module 100-1, specifically, electrically connected to the communication terminal 14 of the charging device 1 through a communication interface, and the voltage control device 2 includes a temperature sensor 22, a voltage sensor 24, a timer 26 and a controller 28. The temperature sensor 22 is disposed on the battery module 100-1 and is used for detecting the temperature of the battery module 100-1 to provide a temperature signal St. The voltage sensor 24 is electrically connected to the battery module 100-1, and is configured to detect a voltage Vb of the battery module 100-1 to provide a voltage signal Sv. The battery module 100-1 may include at least one battery, and the temperature sensor 22 is mainly configured on a cell of the battery to sense a temperature of the cell. The controller 28 is electrically connected to the communication terminal 14 of the charging device 1, the voltage sensor 24 of the temperature sensor 22 and the timer 26, and is used for setting a specific threshold and recharging voltage. The timer 26 is electrically connected to the controller 28, and is used for counting the accumulated time of different temperatures when the upper voltage limit of the battery module 100-1 is set at a specific voltage. The specific threshold, recharging voltage, specific voltage and accumulated time will be further described below.

Referring back to fig. 2, the voltage control apparatus 2 further includes a current sensor 30. The current sensor 30 is, for example but not limited to, a current sensing resistor, and may be electrically connected to the positive (+) or negative (-) electrode of the charging terminal 12. The current sensor 30 mainly detects the current of the charging device 1 for charging the battery module 100-1 to confirm whether the charging device 1 is operating normally during the charging of the battery module 100-1. In another aspect, the voltage control apparatus 2 may include a memory module 32. The memory module 32 is electrically connected to the controller 28 and is used for storing necessary information such as, but not limited to, a specific threshold, a recharging voltage, a specific voltage, and/or a cumulative time. However, if the controller 28 already includes a module having a data storage function, such as, but not limited to, a cache, the voltage control apparatus 2 may not include the memory module 32.

Fig. 3A is a graph of capacity recovery rate of the charging system of the present invention at the same voltage at different temperatures, and fig. 3B is a graph of internal resistance increase rate of the charging system of the present invention at the same voltage at different temperatures, with reference to fig. 2. Since the operation time degradation speed of the battery module 100-1 is closely related to the stored power and temperature, the higher the charged voltage or the higher the operating environment temperature, the faster the operation time of the battery module 100-1 is reduced. It can be seen from the graph of fig. 3A that the capacity recovery rate can be higher than 90% when the cell operating temperature is maintained at 25 ℃ and the operating time exceeds 1 thousand 6 hundred days, assuming that the specific voltage Vs is set at 4.05V (i.e., full charge). However, if the cell operating temperatures are maintained at 40 ℃ and 50 ℃ respectively, and the operating time exceeds 1 thousand 6 hundred days, the capacity recovery rate is already lower than 90%. Especially when the working temperature of the battery cell is maintained at 50 ℃, the capacity recovery rate is already low to 80%. It is apparent that the lower the operating temperature of the battery cells, the less the capacity recovery rate is excessively attenuated, and the operating time of the battery module 100-1 can be prolonged.

Also, assuming that the specific voltage Vs is set at 4.05V (i.e., full charge), it can be seen from the graph of fig. 3B that the internal resistance increase rate is almost maintained at 1% if the cell operating temperature is maintained at 25 ℃ and the operating time exceeds 1 thousand 8 hundred days. However, if the operating temperatures of the cells are maintained at 40 ℃ and 50 ℃ respectively, and the operating time exceeds 1 thousand 8 hundred days, the internal resistance increase rate is already higher than 2.5%. Especially when the working temperature of the battery cell is maintained at 50 ℃, the internal resistance increase rate is higher than 3 percent. It is thus apparent that the lower the operating temperature of the battery cells, the less the internal resistance increase rate increases excessively, and the operating time of the battery module 100-1 can be prolonged.

Please refer to fig. 3C for a graph of capacity recovery rates of the charging system of the present invention at the same temperature and different voltages, and fig. 3D for a graph of internal resistance increase rates of the charging system of the present invention at the same temperature and different voltages, in combination with fig. 1A to 3B. Since the operation time degradation speed of the battery module 100-1 is closely related to the stored power and temperature, the higher the charged voltage or the higher the operating environment temperature, the faster the operation time of the battery module 100-1 is reduced. It can be seen from the graph of fig. 3C that the capacity recovery rate can be higher than 85% when the specific voltage Vs is set to 3.95V and the operating time exceeds 1 thousand 6 hundred days, assuming that the cell operating temperature of the battery is maintained at 40 ℃. However, if the specific voltage Vs is set at 4.05V (i.e., full charge), and the operating time exceeds 1 thousand 6 hundred days, the capacity recovery rate is already lower than 85%. Therefore, it is apparent that if the specific voltage Vs is set to be lower than the full charge, the capacity recovery rate is not excessively attenuated, and the operation time of the battery module 100-1 can be prolonged.

It is also assumed that the cell operating temperature of the battery is maintained at 40 ℃, and as can be seen from the graph of fig. 3D, if the specific voltage Vs is set at 3.95V and the operating time exceeds 1 thousand 8 hundred days, the internal resistance increase rate is lower than 1.5%. However, if the specific voltage Vs is set at 4.05V and the operating time exceeds 1 thousand 8 hundred days, the internal resistance increase rate is already higher than 2%. Therefore, it is apparent that, if the specific voltage Vs is set to be lower than the full charge, the internal resistance increase rate does not excessively increase, and the operation time of the battery module 100-1 can be prolonged. Thus, as can be seen from the graphs shown in fig. 3A-3D, the influencing factors of the cell operating temperature and the charging voltage control the extent of capacity fade and internal resistance increase.

Fig. 4A is a schematic diagram of a charging strategy of a charging system with a life extension of the uninterruptible power supply according to the present invention, and fig. 4B is a schematic diagram of a voltage adjustment method according to a first embodiment of the present invention with a life extension of the uninterruptible power supply according to the present invention, in combination with fig. 2 to 3D. In order to extend the operation time specification of the battery module 100-1 from less than 4 years of the prior art to as long as possible, for example, but not limited to, 5 years, the charging strategy of the present invention is shown in fig. 4A to 4B. After the charging device 1 charges the battery module 100-1 to a recharging voltage in a constant current charging manner, the charging strategy of the present invention starts to be used.

When the battery module 100-1 has a short life (e.g., without limitation, 1 year of use), the controller 28 informs the charging device 1 to charge the battery module 100-1 with a lower specific voltage Vs (e.g., without limitation, a specific voltage Vs whose upper voltage limit of the battery module 100-1 is set at 3.95V). That is, when the voltage Vb of the battery module 100-1 is as low as the recharging voltage Vre set at that time (3.9V), the controller 28 informs the charging device 1 to charge the battery module 100-1 with constant current-constant voltage through the communication terminal 14 to charge the voltage Vb to the specific voltage Vs (3.95V). Wherein the specific voltage Vs is set at a voltage less than full charge (e.g., without limitation, 4V) and greater than the recharging voltage Vre (e.g., without limitation, 3.9V). When the uninterruptible power system 100 is in power interruption, the uninterruptible power system 100 converts the amount of power stored by the battery module 100-1 into power required for the operation of the data center 200, so that the voltage Vb of the battery module 100-1 starts to decrease. Until the voltage Vb of the battery module 100-1 drops to the discharge End voltage Ve (End-off voltage) (for example, but not limited to 2.6V), the uninterruptible power system 100 stops the discharge operation of the battery module 100-1, and when the situation permits (for example, but not limited to double-charging, etc.), the charging device 1 restarts to charge the battery module 100-1 to the specific voltage Vs in a constant-current-constant-voltage manner. The time when the voltage Vb is discharged from the specific voltage Vs to the electric termination voltage Ve is the operation time RT.

As the service life of the battery module 100-1 becomes longer (e.g., without limitation, use for more than 1 year), the battery capacity and the operating time RT of the battery module 100-1 gradually decrease, and the battery capacity and the operating time RT of the battery module 100-1 do not meet the minimum specification of the battery module 100-1, the controller 28 then informs the charging device 1 to increase the specific voltage Vs or the recharging voltage Vre to increase the battery capacity and the operating time RT, which do not meet the minimum specification of the battery module 100-1. The controller 28 is mainly based on the accumulated time reaching the specific threshold, which means that the operation time RT cannot be maintained at the minimum specification (4 minutes), so the controller 28 notifies the charging device 1 to increase the specific voltage Vs or the recharging voltage Vre through the communication terminal 14. When the service life of the battery module 100-1 approaches the upper limit (e.g., without limitation, the service life has exceeded 3 years), the controller 28 uses the same operation to inform the charging device 1 to increase the specific voltage Vs to, for example, but not limited to, a full-charge voltage (e.g., without limitation, 4V) or to increase the recharging voltage Vre (if there is still an up-regulation margin) when the accumulated time reaches the specific threshold, so that the operation time RT can be continuously maintained above the minimum specification (i.e., 4 minutes) of the battery module 100-1.

Further, the accumulated time refers to the time accumulated by the battery module 100-1 at each temperature (e.g., without limitation, 25 ℃,30 ℃, 40 ℃, etc.), not in the unit of "year" described above. A particular threshold refers to a preset threshold, primarily by, for example, but not limited to, a particular algorithm to obtain a default threshold. Therefore, the above adjustment according to the number of years of use is merely for example, and the accumulated time reaches a specific threshold when the time happens to be a certain year.

As can be seen from the schematic diagram of the power supply capability of the battery module of the uninterruptible power supply system of fig. 4B and 4C after several years of use, under the same usage conditions, when the battery capacity of the battery module 100-1 is still sufficient after the service life of the battery module 100-1 reaches 4 years, and when the uninterruptible power supply system 100 is in power interruption, the time (i.e. the operation time RT) for the voltage Vb of the battery module 100-1 to drop from the specific voltage Vs to the discharge termination voltage Ve can still be more than the minimum specification (i.e. 4 minutes) of the battery module 100-1 without putting out the battery. Thus, the operation time of the battery module 100-1 can be greatly increased beyond the upper limit of 4 years.

Please refer to fig. 5, which is a flowchart illustrating a specific threshold parameter setting of the charging system according to the present invention, and further refer to fig. 2-4C. In step (S100), a series of cell aging experiments are performed before the cells of the battery module 100-1 are shipped. And performing the aging test of the battery cell under different temperature, namely voltage conditions to obtain the aging test data of the battery cell. In step (S120), the basic parameters are obtained from the cell aging test data by operation time calculation. The controller 28 calculates the battery aging test data of the battery cells (configured in the battery module 100-1) by the operation time algorithm to obtain the basic parameters. The operation time algorithm is a common algorithm in the industry, and will not be described herein. Then, the base parameters are customized to generate specific thresholds (S140). Because the basic parameters mainly correspond to parameters before the battery cell leaves the factory, and the use environment of the client is usually different from that of the manufacturing end, the voltage and temperature adjustment threshold must be established according to the requirements of the client to generate a specific threshold suitable for the client. Finally, a specific threshold is written to the controller (S160). After the specific threshold is obtained, the specific threshold may be written into and stored in the controller 28 by means of programming/data transmission, so that the controller 28 can regulate the voltage control device 2 through the specific threshold.

Thus, controller 28 may record the time that battery module 100-1 accumulates at each temperature (e.g., without limitation, 25 ℃, 30 ℃,40 ℃, etc.), and each temperature may accumulate separately, or by weighting through the curves of fig. 3A-3D (e.g., without limitation, 25 ℃ weighted 1, 40 ℃ weighted 2, etc.). That is, the accumulated time and the specific threshold can be a single parameter or a plurality of parameters according to the needs of the user. When the accumulated time reaches a specific threshold, the controller 28 notifies the charging device 1 to increase the specific voltage Vs or the recharging voltage Vre through the communication terminal 14, so that the operation time RT can be maintained above the minimum specification of the battery module 100-1.

It should be noted that, since the voltage Vb of the battery module 100-1 is between the specific voltage Vs and the recharging voltage Vre when the main power is normal, the operation time RT of the battery module 100-1 (i.e. the time for the specific voltage Vs to discharge to the electric termination voltage Ve) cannot be directly measured without actual discharge. Therefore, the controller 28 predicts the operation time RT using the accumulated time and the specific threshold, and compensates/adjusts the difference (i.e. the difference between the actual value and the estimated value) when the battery module 100-1 is actually discharged. Specifically, controller 28 predicts the current operating time RT of battery module 100-1 based on the current accumulated time of battery module 100-1, in conjunction with the basic parameters and the data such as the curves of fig. 3A-3D, and determines whether operating time RT can be maintained at the minimum specification (i.e., 4 minutes). In addition, referring to fig. 3A to 3D, it can be seen that the temperature of the battery cell is generally inversely related to the accumulated time, so that the time required for adjusting the specific voltage Vs is generally shortened when the temperature of the battery cell is higher. Conversely, if the temperature of the battery cells is lower, the time required for the specific voltage Vs to be adjusted will be prolonged, so that the battery module 100-1 will also be prolonged in accordance with the operating time specification.

Fig. 6 is a flowchart of a voltage control method of a charging system with a service life of an uninterruptible power supply according to the present invention, and fig. 2 to 5 are also shown. The voltage control method of the charging system is mainly to extend the operation time RT of the battery module 100-1 as much as possible to improve the utilization rate of the battery module 100-1. Specifically, the voltage control method includes recording an operating temperature, a voltage and a time of an internal cell of the battery module (S200). In a preferred embodiment, the temperature sensor 22 is used to detect the temperature of the battery module 100-1, and the voltage sensor 24 is used to detect the voltage Vb of the battery module 100-1. Meanwhile, the controller 28 is utilized to preset a specific voltage Vs, a recharging voltage Vre and a specific threshold, and the controller 28 records the accumulated time of different temperatures under the charging condition of the specific voltage Vs.

Then, the operation time is predicted (S220). Preferably, the controller 28 predicts the operation time RT using the accumulated time tc and a specific threshold TH. Optionally, the controller 28 may compensate/adjust the difference (i.e., the difference between the actual value and the estimated value) when the battery module 100-1 is actually discharged. Then, it is determined whether the operation time can be maintained at the minimum specification (S240). The controller 28 predicts the operation time RT using the accumulated time and the specific threshold, and when the accumulated time reaches the specific threshold, it indicates that the operation time RT cannot be maintained at the minimum specification (4 minutes), so that the specific voltage or the recharging voltage is turned up (S260), and returns to step (S200) to perform continuous detection and determination. Otherwise, if the step (S240) is no, the current specific voltage and the recharging voltage are maintained (S280), and the step (S200) is returned to perform continuous detection and determination.

Fig. 7 is a schematic diagram showing a voltage adjustment mode according to a second embodiment of the present invention for prolonging the lifetime of the uninterruptible power system, and fig. 2 to 6 are combined. The voltage adjustment method in the embodiment of fig. 7 is different from the voltage adjustment method in fig. 4B in that the voltage adjustment method in fig. 7 is based on stepwise adjustment every year. Taking fig. 7 as an example, the specific voltage Vs from the first year to the fourth year may be adjusted in a step manner of 3.95V, 3.97V, 4V, 4.2V, for example, but not limited thereto. Or into finer, more advanced adjustment schemes. Likewise, the recharging voltage Vre can also be multi-level adjusted in this manner. In this way, the battery module 100-1 can be made to meet the operating time specification as much as possible within the service life.

However, the above detailed description and drawings of the preferred embodiments of the present invention are merely illustrative, and the present invention is not limited thereto, but the scope of the present invention is defined by the following claims, and all embodiments falling within the spirit and scope of the present invention and similar changes thereto should be included in the scope of the present invention, and any changes and modifications easily recognized by those skilled in the art are included in the present invention as defined by the following claims.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (17)

1. A charging system electrically connected to a battery module of an uninterruptible power system, the charging system comprising:

The charging device comprises a charging end and a communication end, wherein the charging end is used for electrically connecting the battery module, and when the voltage of the battery module is lower than a recharging voltage, the battery module is charged to a specific voltage by a constant current-constant voltage;

A voltage control apparatus comprising:

A temperature sensor configured on the battery module and used for detecting a temperature of the battery module;

a voltage sensor electrically connected to the battery module for detecting the voltage;

A timer for counting an accumulated time accumulated by different temperatures when an upper voltage limit of the battery module is set at the specific voltage; and

The controller is electrically connected with the communication end, the temperature sensor, the voltage sensor and the timer and is used for setting a specific threshold;

The controller notifies the charging device to increase the specific voltage or the recharging voltage through the communication terminal based on the accumulated time reaching the specific threshold.

2. The charging system according to claim 1, wherein the controller notifies the charging device to charge the battery module with the constant current-constant voltage through the communication terminal to charge the voltage to the specific voltage based on the voltage being lower than the recharging voltage.

3. The charging system of claim 1, wherein the voltage control means further comprises:

The current sensor is electrically connected between the battery module and the charging end and is used for detecting a current of the charging device for charging the battery module.

4. The charging system of claim 1, wherein the controller calculates a battery aging test data of the battery module by an operation time algorithm to obtain a base parameter, and the base parameter is adjusted by a customized algorithm to generate the specific threshold.

5. The charging system of claim 4, wherein the temperature is inversely related to the integration time.

6. The charging system according to claim 1, wherein the controller predicts an operation time of the battery module based on the accumulated time, and determines whether the operation time can be maintained at a minimum specification.

7. The utility model provides a voltage control device, electric connection does not cut off power supply system's a battery module and a charging device between, its characterized in that, and this voltage control device includes:

A temperature sensor configured on the battery module and used for detecting a temperature of the battery module;

the voltage sensor is electrically connected with the battery module and is used for detecting a voltage of the battery module;

A timer for counting an accumulated time accumulated by different temperatures when an upper voltage limit of the battery module is set at a specific voltage; and

The controller is electrically connected with the charging device, the temperature sensor, the voltage sensor and the timer and is used for setting a specific threshold;

The controller notifies the charging device to turn up the specific voltage or the controller defaults to recharge the voltage based on the accumulated time reaching the specific threshold.

8. The voltage control apparatus of claim 7, wherein the controller informs the charging device to charge the battery module with the constant current-constant voltage to charge the voltage to the specific voltage based on the voltage being lower than the recharging voltage.

9. The voltage control apparatus according to claim 7, comprising:

and the current sensor is electrically connected between the battery module and the charging device and is used for detecting a current of the charging device for charging the battery module.

10. The voltage control apparatus of claim 7, wherein the controller calculates a battery aging test data of the battery module by an operation time algorithm to obtain a base parameter, and the base parameter is customized to generate the specific threshold.

11. The voltage control apparatus of claim 10 wherein the temperature is inversely related to an operating time of the battery module.

12. The voltage control apparatus of claim 7, wherein the controller predicts an operating time of the battery module based on the accumulated time and determines whether the operating time can be maintained at a minimum specification.

13. The voltage control method is electrically connected between a battery module and a charging device of an uninterruptible power system through a voltage control device, and is characterized by comprising the following steps:

Setting a specific threshold and recharging voltage;

Charging the battery module to a specific voltage at a constant current-constant voltage when a voltage of the battery module is low to a recharging voltage;

Detecting a temperature of the battery module;

Counting an accumulated time accumulated by different temperatures when an upper voltage limit of the battery module is set at the specific voltage; and

Notifying the charging device to turn up the specific voltage or the recharging voltage based on the accumulated time reaching the specific threshold.

14. The method of claim 13, further comprising the steps of:

An operating time of the battery module is predicted based on the accumulated time, and it is determined whether the operating time can be maintained at a minimum specification.

15. The method of claim 13, further comprising the steps of:

calculating battery aging experimental data of the battery module through an operation time algorithm to obtain a basic parameter; and

Generating the specific threshold by a customized adjustment of the base parameter;

Wherein the temperature is inversely related to the accumulated time.

16. The method of claim 13, further comprising the steps of:

Detecting the voltage; and

The charging device is informed to charge the battery module at the constant current-constant voltage based on the voltage being lower than the recharging voltage to charge the voltage to the specific voltage.

17. The method of claim 13, further comprising the steps of:

detecting a current of the charging device for charging the battery module.