TWI405383B - Intelligent charge and discharge system - Google Patents

Abstract

An intelligent charging and discharging system comprises a digital signal processor (DSP) chip module, a control circuit module, and a plurality of battery sets. By the collocation of the above modules, an in-parallel charging and in-series discharging circuit system can be constructed. A digital signal processor (DSP) is used to detect the voltage of each battery set and, based on this, to calculate the total battery capacity. With the set usage mode, fuzzy logic algorithm is used to predict the number of prior discharging battery sets and the number of prior charging battery sets, and after the discharging battery sets inputting to a serious voltage regulation module through the control circuit module, producing a voltage output to a motor or other power system. And the charging battery sets are to receive power in a parallel manner through the control circuit module and output voltage for charging via the voltage regulation module, and thus the balance charging and discharging of intelligent batteries can be achieved.

Description

Intelligent charging and discharging system

The invention relates to an intelligent charging and discharging system, in particular to a smart charging and discharging system capable of automatically adjusting the priority charging, discharging and balancing charging and discharging functions of the battery.

According to the battery, in the production process, there is a general difference in the chemical composition ratio, and even if the battery with the same performance at the factory, the storage time and environmental factors may cause the client to use the same specification and label when using it for the first time. The battery has also had a difference in performance.

Therefore, how to balance the battery charge and discharge, extend its service life, and make the power system more reliable is an important issue. There are various solutions for battery equalization charging and discharging in the market, generally starting toward hardware (ie, circuit design), including the use of capacitors, inductors or transformers to achieve passive or active balanced charge and discharge. Although the above solution can solve the problem of balanced charging and discharging of the battery, it is still not a smart system.

Therefore, the present invention is directed to research in this direction, and further proposes a smart system based on software and hardware, and hopes to provide a more complete and efficient charging and discharging system.

One of the objects of the present invention is to solve the above problems and provide a smart charging and discharging system, which utilizes a digital signal processor (DSP) chip module to infer the number of preferentially discharged battery packs and the number of preferentially charged battery packs, and transmits the control circuit module. After the discharge battery pack is connected in series to the voltage regulator module, the output voltage is supplied to the power demand system, and the rechargeable battery pack receives a power supply system in parallel through the control circuit module, and is charged through the output voltage of the voltage regulator module, and has an automatic Adjust the function of battery priority charging and discharging and battery equalization charging and discharging.

The second object of the present invention is that the intelligent charging and discharging system of the present invention can automatically adjust the number of charging and discharging batteries according to the operation mode set by the user. When the system does not need large power, the number of discharged battery packs is reduced, so that the system can Maximize power and extend battery life.

For the purpose of the foregoing, the present invention comprises: a digital signal processor (DSP) chip module, a control circuit module and a plurality of battery packs, wherein the above modules are combined to form a parallel charging and series discharging circuit. The system uses the digital signal processor to detect the voltage of each battery pack, and calculates the total battery power according to the setting, and uses the fuzzy logic algorithm to estimate the number of battery packs with priority discharge and the number of battery packs that are preferentially charged. And the control circuit module connects the discharge battery pack into the voltage regulator module in series, and outputs the voltage to a motor or other power demand system, and the rechargeable battery pack receives a power supply system in parallel through the control circuit module. The output voltage of the voltage regulator module is charged to achieve the effect of balanced charging and discharging of the smart battery.

The above and other objects and advantages of the present invention will be readily understood from

Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings.

Referring to Figures 1 through 3, the structure of the embodiment selected for use in the present invention is for illustrative purposes only and is not limited by such structure in the patent application.

As shown in the first to second embodiments, the following is an embodiment of the intelligent charging and discharging system of the present invention, which mainly includes: a digital signal processor (DSP) chip module 1, a control circuit module 2, and a plurality The battery pack 3, by the combination of the above modules, can form a circuit system of parallel charging and series discharging.

The digital signal processor (DSP) chip module 1 is, in this embodiment, a TMS320F2812 digital signal processor.

In the smart charging and discharging system, each of the battery packs 3 is formed by connecting at least two batteries in series, and is individually connected to the control circuit module 2 to form a plurality of (set to N) battery packs 3 in parallel with each other.

The digital signal processor (DSP) chip module 1 can detect the voltage V _k (k=1, 2, . . . N) of each battery pack 3, and calculate the total battery power Q according to this, and compare the two according to the two. The voltage level is sorted, and the set usage mode M _j (j=1, 2,...m) is used to estimate the number of discharged battery packs (N _d ) and the number of rechargeable battery packs (NN _d ) by fuzzy logic algorithm. And after the discharge battery pack is serially input into a voltage regulator module R1 through the control circuit module 2, the output voltage V1 is output to a motor or other power demand system 4.

Among them, the calculation formula is converted into the total electricity quantity Q as follows:

Where N is the number of battery packs, V _full is the saturation voltage, and V _end is the discharge termination voltage.

The logic operation function of the digital signal processor (DSP) chip module 1 is sorted according to the voltage level, and is ambiguously written by the digital signal processor (DSP) chip module 1 according to the operation mode set by the user. The logical algorithm estimates the number of priority discharge battery packs (N _d ) and the number of priority rechargeable battery packs NN _d .

In this embodiment, the charging and discharging can be based on the fuzzy rule table structure of Annex 1, wherein Q1, Q2, ..., Q5 are a range of intervals (such as Q1=0~10, Q2=10~20, Q3=20~50). , Q4=50~80, Q5=80~100). Now if the motor operation mode is M ₂ , the current total battery pack power is Q ₂ %, and the fuzzy logic algorithm programmed in the digital signal processor (DSP) chip module 1 will be according to the rule table of Annex 1. To automatically determine the number of discharge batteries required to be N _d = N ₇ , the number of battery packs that can be used for charging is NN _d = NN ₇ . And the digital signal processor (DSP) chip module 1 outputs a control signal to the control circuit module 2 to perform a switching operation, thereby automatically adjusting the number of preferential charge and discharge battery packs, and controlling the battery pack with a higher voltage. The discharge operation is preferentially performed, and is input to the motor or other power demand system 4 through the voltage regulator module R1.

The rechargeable battery pack receives the main power system 5 (for example, indoor power supply, outdoor charging column, charging station, etc.) or the auxiliary power supply system 6 through the control circuit module 2 in parallel (for example, the motor kinetic energy recovery conversion power supply, The power generator power supply or the small wind power generator power supply, etc.) is charged by the voltage output voltage V2 of the voltage regulator module R2 to achieve the function of charging and discharging the smart battery. The indoor main power supply AC/DC and the auxiliary power supply system will also be input to the lower voltage battery pack through the voltage regulator module R2 (if the motor kinetic energy is recovered, also through the voltage regulator module R2), when the battery pack is charged. When full, the power supply is input to the motor or other power demand system 4 by the voltage regulator module R1.

The digital signal processor (DSP) chip module 1 can monitor the voltage of each group of batteries. When it is determined that one of the battery voltages is insufficient, the control signal is output to the control circuit module 2, so that the switching operation is performed. Switch the battery pack to the charging state, and the remaining groups continue to discharge. Furthermore, a plurality of (set to N) battery packs can be simultaneously discharged, and half-charge, half-discharge, etc. can be set.

In addition, during the charging and discharging process, the digital signal processor (DSP) chip module 1 can calculate the voltage difference ΔV of each battery pack 3, when the voltage difference ΔV is less than the preset value E (the E value can be set by the user) It can be determined that each battery pack 3 is in a balanced state. When the voltage between the battery packs 3 is different and greater than the preset value E, the battery pack 3 can be switched to the charging state by itself, so as to average and stabilize the voltage between the batteries to achieve a balanced battery charge. The purpose of the discharge is to enable the intelligent battery to automatically adjust the priority of charge and discharge and the function of battery equalization charge and discharge. And when the system detects that more than half of the battery pack 3 is under voltage, it will send a signal and inform the user that the battery is low and must be charged immediately.

Therefore, regardless of whether the battery pack 3 only needs to be charged, only needs to be discharged, or needs to be discharged and charged at the same time, with the digital signal processor (DSP) chip module 1, the system will have battery automatic adjustment priority charging and discharging and battery equalization. Charge and discharge function.

The invention can also automatically adjust the number of charge and discharge batteries according to the operation mode set by the user. When the system does not need large power, the number of discharged battery packs is reduced, so that the system can maximize the effect and prolong the service life of the battery.

In addition, the intelligent charging and discharging system of the present invention can be applied to peripheral applications such as a solar power generation system, a small wind power generation system, an electric or hybrid electric locomotive or an automobile, and a light electric vehicle.

Of course, there are many examples of the invention, with only minor variations in the details. Please refer to FIG. 3 , which is a second embodiment of the present invention, wherein the smart charging and discharging system can be applied to a foot-powered electric bicycle, and the logical operation function of the digital signal processor (DSP) chip module 1 is estimated. The number of preferentially discharged battery packs (N _d ) and the number of preferentially charged battery packs NN _d , and the digital signal processor (DSP) chip module 1 outputs a control signal to the control circuit module 2 to perform a switching operation. Automatically adjust the number of priority charging and discharging battery packs, and control the battery pack with higher voltage to preferentially perform discharge operation, input to the motor 41 through the voltage regulator module R1, and the rechargeable battery pack is accepted in parallel through the control circuit module 2 The main power system 51 (for example, indoor power supply, outdoor charging column, charging station, etc.) or the auxiliary power supply system 61 (for example, motor kinetic energy recovery conversion power supply) is charged by the voltage output V2 of the voltage regulator module R2 to achieve a smart battery. Balance the function of charging and discharging.

Among them, a plurality of (set to N) battery packs can be discharged at the same time, and half-charge, half-discharge, etc. can be set, and the switching mode can be divided into an economic mode (flat speed or downhill deceleration, etc.), normal. Modes (flat terrain, etc.) and motion modes (climbing or acceleration, etc.), these three modes can switch the charge and discharge status of each battery pack.

Moreover, when the system determines that the driving state is the fixed speed of the economy mode, the system automatically discharges with less battery packs and switches the battery packs that need to be charged.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objects and is in accordance with the provisions of the Patent Law.

(customized part)

no

(part of the invention)

1. . . Digital signal processor (DSP) chip module

2. . . Control circuit module

3. . . Battery

4. . . Electric motors and other power demand systems

41. . . electric motor

5, 51. . . Main power system

6, 61. . . Auxiliary power system

R1, R2. . . Voltage regulator module

Figure 1 is a block diagram of the present invention.

Figure 2 is a flow chart of the present invention.

Figure 3 is a block diagram of a second embodiment of the present invention.

1. . . Digital signal processor (DSP) chip module

2. . . Control circuit module

3. . . Battery

4. . . Electric motors and other power demand systems

5. . . Main power system

6. . . Auxiliary power system

R1, R2. . . Voltage regulator module

Claims (5)

A smart charging and discharging system, comprising: a digital signal processor (DSP) chip module, a control circuit module and a plurality of battery packs, wherein the above modules are combined to form a parallel charging and series discharging circuit The system uses the digital signal processor (DSP) chip module to detect the voltage of each battery pack, and calculates the total battery power according to this, and the formula for calculating the total power is as follows: Where Q is the total amount of electricity, N is the number of battery packs, V _K is the voltage, V _full is the saturation voltage, and V _end is the discharge termination voltage; and is used in conjunction with the set usage mode by writing to the digital signal processor (DSP) The fuzzy logic algorithm of the chip module estimates the number of battery packs that are preferentially discharged and the number of battery packs that are preferentially charged, and then uses the digital signal processor (DSP) chip module to monitor the voltage of each group of batteries when determining one of the batteries. When the voltage is insufficient, the control signal is output to the control circuit module, so that the switching operation is performed to switch the battery pack to the charging state, and the remaining groups continue to discharge, and then the discharge battery pack is serially input through the control circuit module. After the voltage regulator module, the output voltage is applied to a motor or other power demand system, and the rechargeable battery pack receives a power supply system in parallel through the control circuit module, and is charged by the output voltage of the voltage regulator module to reach the smart battery. Balanced charge and discharge function, wherein the set usage mode includes at least one economic mode, a normal mode, and a motion mode, and when set When the economy mode, the system automatically with less discharge of the battery needs to be charged and the switching charges the battery pack. According to the intelligent charging and discharging system of claim 1, wherein each of the battery packs is formed by connecting at least two batteries in series, and is individually connected to the control circuit module to form a plurality of battery packs connected in parallel with each other. status. The intelligent charging and discharging system according to claim 1, wherein the power system is a main power system, and the main power system is an indoor power source, an outdoor charging column or a charging station. The intelligent charging and discharging system according to claim 1, wherein the power system is an auxiliary power system, and the auxiliary power system is a motor kinetic energy recovery conversion power source, a power generator power source or a small wind power generator power source. . The intelligent charging and discharging system according to the first aspect of the patent application, wherein the intelligent charging and discharging system is applied to a solar power generation system, a small wind power generation system, an electric or hybrid electric locomotive or a car, and a light electric vehicle. Peripheral applications.