TWI669876B - Power supply system and its operating method - Google Patents

Abstract

A power supply system and an operation method thereof. The power supply system is used to supply power to a load. The power supply system includes a plurality of power storage units and a control device, wherein the power storage unit is electrically connected to the load, and each power storage unit has a positive terminal and a negative terminal ; The control device is electrically connected to the positive and negative terminals of each storage unit, the control device detects the parameter value of each storage unit, and when the detected parameter value is less than the predetermined value, it outputs supplementary energy to the corresponding storage unit The positive and negative terminals of the unit enable the supplementary energy and the energy of the storage unit to supply power to the load, thereby making the storage unit more economical and not affect the whole when one of the storage units is damaged or the performance is reduced Power supply device.

Description

Power supply system and its operating method

The invention relates to the supply of load power; in particular, it refers to a power supply system and its operation method.

Fig. 1 is a schematic diagram of a conventional power supply device that supplies power to a load L. The power supply device includes at least one battery pack 1, and the battery pack 1 is composed of a plurality of battery cells 1a connected in series. It can be composed of parallel connections.

Taking a battery pack 1 as an example, when the battery pack 1 has a battery cell 1a with poor performance, the battery cell 1a with poor performance will make the battery pack 1 supply power to the load L less efficient. Therefore, when the manufacturer produces the battery pack 1, All the battery cells 1a will be tested, and the battery cells 1a with similar characteristics will be matched to make the battery pack 1 to avoid the situation of poor efficiency of the battery pack 1 at the factory, but the process of testing the battery pack 1 takes a lot of time , Resulting in poor production efficiency.

In addition, although the battery cell 1a has been tested at the factory, the battery cell 1a may still be aged or damaged. When the performance of the battery pack 1 is reduced, and only one of the battery cells is included in the battery pack 1 1a damage or reduced performance will cause the battery pack 1 to be replaced, which is extremely environmentally friendly and not in line with economic benefits.

Please refer to FIG. 2 for another conventional power supply device, which includes a plurality of battery packs 2 connected in series. If one of the battery packs 2 becomes worse or damaged, the performance of the entire power supply device will also be affected.

In view of this, the object of the present invention is to provide a power supply system and an operation method thereof, which can provide an additional energy that supplements the insufficient output of the power storage unit to the load when the power storage unit is damaged or the performance is reduced.

In order to achieve the above object, the present invention provides a power supply system for supplying power to a load, including: a plurality of power storage units and a control device, wherein the power storage units are electrically connected to the load, each of the power storage The unit has a positive terminal and a negative terminal; the control device is electrically connected to the positive terminal and the negative terminal of the power storage units, the control device detects a parameter value of each power storage unit, and detects When the parameter value is less than a predetermined value, a supplementary electrical energy is output to the positive terminal and the negative terminal of a corresponding one of the power storage units, so that the supplementary electrical energy and the electrical energy of the power storage units jointly supply power to the load.

The present invention provides an operation method of a power supply system for supplying power to a load. The power supply system includes a plurality of power storage units and a control device, wherein the control device is electrically connected to one of the power storage units Positive terminal and a negative terminal; the operation method includes the following steps A. The control device detects a parameter value of each of the power storage units; B. Determines whether a parameter value of any power storage unit is less than a predetermined value: No, the electrical energy from the electrical storage units is output to the load; if it is, a supplementary electrical energy is output to the electrical storage unit whose parameter value is less than the predetermined value, and the electrical energy is supplied to the electrical load from the electrical energy of the electrical storage units The load. .

The effect of the present invention is that the control device can detect the parameter value of each power storage unit, and the control device can determine whether the power storage unit needs supplemental power according to the parameter value, and output supplemental power to the power storage unit when power supplement is needed, The power supply system can supply power to the load stably, and will not affect the entire power supply system when one of the power storage units is damaged or the performance is reduced, so that the power supply system can achieve energy saving and environmental protection and meet economic benefits.

In order to explain the present invention more clearly, the preferred embodiments are described in detail below with reference to the drawings. Please refer to FIG. 3, which is the power supply system of the first preferred embodiment of the present invention for supplying a load L, and the power supply system includes a battery pack 3 and a control device 10, and the battery pack 3 is electrically connected to the Under load L, the battery pack 3 includes a plurality of battery cells 20 connected in series. The battery cells 20 constitute a plurality of power storage units in this embodiment, and each battery cell 20 has a positive terminal 20a and a negative terminal 20b.

The control device 10 is electrically connected to the load L, and includes a detection module 12 and a supplementary electricity module 14, wherein the detection module 12 is electrically connected to the supplementary electricity module 14 and the positive end 20a and negative of each battery cell 20 End 20b; a power supply side 14a of the charging module 14 is electrically connected to a power supply P, a load side 14b of the charging module 14 and the positive terminal 20a and the negative terminal 20b of each battery cell 20.

Please refer to FIG. 4 again. The detection module 12 is used to detect a parameter value between the positive terminal 20a and the negative terminal 20b of each battery cell 20. In this embodiment, the parameter value includes each battery cell 20 Between the positive terminal 20a and the negative terminal 20b. In other embodiments, the parameter value may further include the voltage difference between the positive terminal 20a and the negative terminal 20b of the battery cell 20, but not limited to this.

Please refer to FIG. 5 again. In this embodiment, the charging module 14 detects the parameter value of each battery cell 20 according to the detection module 12 and decides whether to output a supplemental electric energy to the positive end of the corresponding battery cell 20 20a and the negative terminal 20b, and in this embodiment, the supplemental electrical energy is current.

The operation method of this embodiment can be performed by the structure of the power supply system described above. The operation method includes the following steps shown in FIG. 6:

First, in step S1, the detection module 12 detects the parameter value of each battery cell 20. In this embodiment, the detection module 12 detects the current between the positive terminal 20a and the negative terminal 20b of the battery cell 20.

In step S2, the charging module 14 compares each parameter value acquired by the detection module 12 with a predetermined value stored in the control device 10, and determines whether a parameter value of any battery cell 20 is less than the predetermined value. In this embodiment, the predetermined value refers to a current value, where the current value is the lowest current that the battery cell 20 can tolerate in the power supply system, for example, it can be set to 80% of the rated current value of the battery cell 20. In other embodiments, corresponding to different types of parameter values (voltage difference, power), the predetermined value may be a voltage value or a power value.

If the parameter value of any battery cell 20 is less than the predetermined value, step S3 is executed, and the replenishment module 14 outputs supplemental electric energy to the positive terminal 20a and the negative terminal 20b of the battery cell 20 whose parameter value is less than the predetermined value The core 20 and the supplemental electrical energy will jointly supply power to the load L, whereby the supplementary electrical energy can supplement the electrical energy of the battery core 20 that is insufficient to power the load L. In other embodiments, the supplemental electrical energy may also be a voltage, and the supplemental voltage is to stabilize the voltage.

If no parameter value of the battery cell 20 is less than the predetermined value, step S4 is executed to directly supply power to the load L from the battery cells 20.

With the power supply system and the operation method of the first preferred embodiment of the present invention described above, when the power supply system supplies power to the load, the power supply module can supplement the electric energy of the battery cell with deteriorated or damaged performance, so that the power supply system does not It will affect the overall power supply performance due to the deterioration or damage of the battery cells, so that the power supply system can be used for a longer period of time.

7 shows a power supply system according to a second preferred embodiment of the present invention. The power supply system includes a plurality of battery packs 4, and in this embodiment, the load side 10a of the control device 10 is electrically connected to the battery packs 4 has a positive terminal 4a and a negative terminal 4b, and the power supply side 10b of the control device 10 is electrically connected to a power supply P. The operation method of the power supply system is the same as the previous embodiment, that is, the control device 10 also includes a detection module 12 and a recharge module 14, wherein the detection module 12 is used to detect the positive terminal 4a and negative of each battery pack 4 When the parameter value between the terminals 4b is determined by the charging module 14 to be less than a predetermined value, the charging module 14 outputs supplemental power, whereby the supplementary power can supplement the power when at least one battery pack 4 is degraded In order to maintain the power supply system at a certain power supply level, the overall power supply level of the power supply system will not be reduced due to the decline in the performance of at least one battery pack 4.

In summary, the power supply system and the operation method of the present invention detect the power storage units by the detection module, and supplement the power to the power storage unit by the power supplement module, so that the power supply system can be maintained at A certain level of power supply, more specifically, when the performance of the power storage unit is reduced or damaged, the power supply system of the present invention will supplement the power of the power storage unit by the power supply module, so that the power supply system can supply power to the load stably. It will not affect the entire power supply system when one of the power storage units is damaged or the performance is reduced. By this, the power supply system can achieve energy saving and environmental protection, and is in line with economic benefits.

The above is only the preferred and feasible embodiments of the present invention, and any equivalent changes in applying the description of the present invention and the scope of patent application should be included in the patent scope of the present invention.

〔Convention〕

1‧‧‧ battery pack

1a‧‧‧Battery cell

2‧‧‧ battery pack

〔this invention〕

3‧‧‧ battery pack

4‧‧‧ battery pack

4a‧‧‧End

4b‧‧‧Negative

10‧‧‧Control device

10a‧‧‧load side

10b‧‧‧Power side

12‧‧‧Detection module

14‧‧‧Charge module

14a‧‧‧Power side

14b‧‧‧ Load side

20‧‧‧ battery cell

20a‧‧‧end

20b‧‧‧Negative

L‧‧‧load

P‧‧‧Power

Fig. 1 is a schematic diagram of a conventional power supply device supplying power to a load; Fig. 2 is a schematic diagram of another conventional power supply device supplying power to a load; Fig. 3 is a block diagram of a power supply system according to a first preferred embodiment of the present invention; Schematic diagram, which indicates that the detection module detects each parameter value of each battery cell, and sends a supplementary electrical signal to the rechargeable unit; FIG. 5 is a schematic diagram illustrating that the rechargeable unit recharges each battery cell; FIG. 6 is the first Flow chart of the operation method of the power supply system of the preferred embodiment; FIG. 7 is a block diagram of the power supply system of the second preferred embodiment of the present invention.

Claims (9)

A power supply system for supplying power to a load includes: a plurality of power storage units, electrically connected to the load, each of the power storage units has a positive terminal and a negative terminal; a control device, electrically connected to the storage units The positive end and the negative end of the electric unit, the control device detects a parameter value of each of the electric storage units, and outputs a supplemental electric energy to the corresponding one of the storage when the detected parameter value is less than a predetermined value The positive terminal and the negative terminal of the electric unit complement the corresponding electric energy storage unit which is insufficient for the load, so that the supplemental electric energy and all the electric energy of the electric storage units jointly supply power to the load. The power supply system according to claim 1, wherein the control device further includes a detection module and a supplementary power module, the detection module is electrically connected to the supplementary module and the positive ends of the power storage units and The negative terminal, the detection module detects each parameter value of the electric storage unit; the electric charging module is electrically connected to a power source and the positive and negative terminals of the electric storage units, and the electric charging module When the parameter value detected by the detection module is less than the predetermined value, the supplementary electrical energy is output to the positive terminal and the negative terminal of a corresponding power storage unit. The power supply system according to claim 1, wherein the parameter value of each power storage unit is the current between the positive terminal and the negative terminal, and the supplementary electrical energy is a current. The power supply system according to claim 1, wherein the power storage units are connected in series. The power supply system according to claim 1 includes a battery pack including a plurality of battery cells connected in series, and the battery cells constitute the power storage units. The power supply system according to claim 1, wherein the power storage units are a plurality of battery packs. An operation method of a power supply system for supplying power to a load, the power supply system includes a plurality of power storage units and a control device, wherein the control device is electrically connected to a positive end of each power storage unit and a Negative terminal; The operation method includes the following steps: A. The control device detects a parameter value of each power storage unit; B. Determines whether any of the power storage unit parameter values are less than a predetermined value: if not, by The electrical energy of the electrical storage units is output to the load; if it is, a supplemental electrical energy is output to the positive and negative ends of the electrical storage unit whose parameter value is less than the predetermined value to complement the corresponding electrical storage unit is insufficient for supply The electrical energy of the load is supplied to the load by the supplementary electrical energy and the electrical energy of all the storage units together. The operation method of the power supply system according to claim 7, wherein the control device includes a detection module and a supplementary power module; wherein, in step A, the detection module detects the parameter of each power storage unit Value; In step B, the supplementary electrical energy is output by the supplementary electricity module. The operation method of the power supply system according to claim 7, wherein the parameter value described in step A is the current between the positive terminal and the negative terminal of each power storage unit; and described in step B The supplementary electrical energy is current.