KR101962957B1 - Battery protecting system containing extension of battery life and protection of battery - Google Patents

Abstract

The present invention relates to a battery protection system having a battery temperature compensation function and a battery discharge prevention function. The batter protection system having a life extension function and a protection function of a battery according to the present invention comprises: a lead acid battery; and a thermocouple. The temperature of the lead acid battery can be determined from the thermocouple, and the lead acid battery is surrounded by carbon fibers, which is a carbon heating device, so that the temperature can be maintained.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery protection system,

The present invention relates to a temperature compensation function of a battery using a carbon heating element and a battery protection system including a battery discharge prevention function using a carbon super capacitor.

Energy storage devices are becoming a key component in next generation power supply networks such as distributed power and smart grid environment. Recently, researches on renewable energy such as solar power, solar heat, wind power, and bio have been actively conducted. As the energy storage device is a secondary battery, it can be charged and discharged many times. However, since its life is determined, it is necessary to schedule efficient charging and discharging according to usage environment and purpose. Do.

Energy storage devices are mainly used in data center and electric car fields. Data centers require a tremendous amount of power to maintain constant temperature and humidity, and must be prepared for emergency power outages. Thus, a power management system that can supply power independently for emergency power outages is being used while supplementing the enormous amount of power consumed for cooling electronic equipment through the energy storage device.

In this case, as long as the energy storage device stores sufficient energy, it is possible to achieve the purpose of using the energy storage device. In the field of electric vehicles, rapid charging is essential due to the characteristics of a moving means such as an automobile, and an energy storage device is used for supplying electric power stably to an electric vehicle.

In this regard, the energy storage device is mainly designed to reliably measure the state of charge remaining in the energy storage device and the charging method and charger hardware that can be efficiently charged in a short time.

Recently, the exhaustion of fossil fuels and the intensification of air pollution have raised the demand for environmentally friendly energy. Accordingly, commercialization of electric powered vehicles such as electric vehicles and hybrid vehicles that can be operated using electric energy supplied from a secondary battery has been actively promoted in developed countries.

When the electric drive vehicle is operated, the depth of discharge (DOD) of the secondary battery measures the travelable distance of the electric drive vehicle, and the Depth of discharge of the secondary battery is the driveability of the electric drive vehicle And is a necessary parameter for controlling the start and end of charging or discharging of the secondary battery.

FIG. 1 is a graph showing the relationship between the discharge depth of a lead-acid battery and the number of charge cycles.

Referring to FIG. 1, in the case of a lead-acid battery, the lifetime of the secondary battery, which is a lead-acid battery, is determined by the number of times of charging and discharging of the lead-acid battery. The number of times of charging and discharging can be determined by the Depth of Discharge (DOD) of the physical properties of the battery.

The discharge depth is a numerical value indicating how much of the capacity of the battery is discharged.

Therefore, even in the case of a lead-acid battery known as a secondary battery, the lifetime of the battery depends on the discharge depth (how much of the capacity is discharged).

Referring to FIG. 1, if a deep cycle battery discharges only 20%, it must be able to use more than 4000 times (i.e., 10 years or more, 365 times a year). For reference, a deep cycle battery is a lead-acid battery that is designed to discharge very heavily on a regular basis using most of its capacity.

In contrast, starter batteries (eg most automotive batteries) are designed to provide a short, high-current burst to crank the engine, which has the characteristic of discharging only part of the capacity frequently. This means that a deep cycle battery can be used as the starter battery, but a low crank current means that an extra large battery may be needed.

Deep cycle batteries are designed to discharge between 45% and 75% of capacity, depending on the manufacturer and battery configuration. These batteries can be cycled to 20% charge, but the maximum cost life is to maintain an average cycle of about 45% discharge.

That is, as shown in FIG. 1, there is an inverse correlation between the discharge depth (DOD) of the battery and the number of charge / discharge cycles.

However, in the case of currently installed batteries, many systems have a life span of less than 5 years. This is because it does not adopt a method for protecting the life of the battery. In the present invention, the need for providing such a protection function is reduced, and the present invention has been completed.

(0001) Korean Patent Laid-Open Publication No. 10-2013-0074046, a method and system for controlling charge / discharge of an energy storage device

In order to solve the above problems, an object of the present invention is to minimize a capacity drop due to a temperature drop of the lead-acid battery by applying a temperature compensation function when using a secondary battery such as a lead- The present invention provides a battery protection system using a temperature compensation system that does not provide a general heater as a method for temperature compensation, and can operate in a heat-efficient dimension with less power consumption during heat generation.

In addition, there is no dielectric substance, which is a unique material used in conventional capacitors. Also, active carbon having a large surface area, which does not use a chemical reaction for charging and discharging, is used, and the distance of the dielectric is shortened. Supercapacitor which can get large electrostatic capacitance is over 20% instantaneous DOD by over current for electric device which consumes over power due to momentary overcurrent like LAMP, electric signboard, warning light, siren, speaker amplifier Another object of the present invention is to provide a battery protection system that uses a super capacitor as a first power source to prevent a lead acid battery that is a secondary battery and is highly affected by a high current in charging and discharging characteristics.

According to an aspect of the present invention, there is provided a battery protection system including a battery life extension function and a protection function, the battery protection system comprising: a lead acid battery which is a secondary battery capable of performing a charging function and a discharging function; And the discharge function are opposite to each other. In order to maximize the recovery, it is necessary to protect the lead-acid battery, which is a secondary battery.

For this, two methods are used in the present invention. First, attention is paid to the characteristic that the depth of discharge of the lead-acid battery changes depending on the temperature, so that the carbon that can perform the temperature compensation function (Compensation of Temperature) A method of directly heating the carbon heating device including the fiber to the outer circumferential surface of the lead accumulator and transferring the heat generated from the carbon heating device to the lead accumulator battery is used so that the lead accumulator has a temperature of less than -10 ° C (DOD) which is deteriorated due to the presence of the battery.

Particularly, when the surface heating element including carbon fiber as the carbon heating device and the temperature control method for controlling the temperature of the lead accumulator are controlled by PIV (Proportional Integral Derivative) control, the carbon heating device is heated The temperature of the lead-acid battery can be immediately improved. When the temperature reaches 0 ° C, the step of heating the carbon heating device is interrupted to minimize energy waste through unnecessary heating.

In this case, the temperature range for turning on the carbon heating device at -10 ° C and the temperature for turning off the carbon heating device at 0 ° C are arbitrary. For example, they can be changed to turn on at 35 ° C and turn off at 45 ° C.

In one embodiment of the present invention, the use of the first capacitor, which is the first battery, is performed by measuring the current flowing through the first battery, .

Here, the steady current refers to a current which can not be more than 20% of the discharge depth of the lead-acid battery which is the main battery in the present invention due to the instantaneous overcurrent. If the current flowing through the lead accumulator exceeds the discharge depth of 20%, the current is such that the life of the battery may be reduced as the number of times of charge and discharge of the battery is reduced. It is preferable to control so as to control the drive selection of the first battery and the second battery.

In one embodiment of the present invention, the battery protection system including the battery life extension and protection function prevents the lead acid battery from reaching the freezing point and stopping the use of the battery in consideration of the discharge depth and freezing point characteristics of the lead acid battery It can be done.

In a method of operating a battery protection system including a function of extending a life of a battery and protecting the battery according to an embodiment of the present invention, a method of using a LAMP, an electric signboard, a warning light, a siren or a speaker amp In this case,

(1) a step (s10) of protecting a lead-acid battery which is a second battery from an overcurrent flow by using a supercapacitor which is a first battery; (2) a step of driving using a second lead battery when a steady- (3) In order to prevent a decrease in the depth of discharge of the lead-acid battery due to the ambient temperature drop of the lead-acid battery during the use of the lead-acid battery, (S30) of enclosing the carbon heating device including the carbon heating device and electrically connecting the lead accumulator and the carbon heating device through a relay to check the temperature of the lead accumulator (s30); and (4) (S40) of driving the carbon heating apparatus when it is less than or equal to a predetermined value; And (5) stopping the driving of the carbon heating device including the carbon fibers when the temperature of the lead accumulator is 0 ° C or more (S50). However, it is directly related to the number of times of charging / discharging of the lead accumulator The lead accumulator, which is the second battery, may be stopped and operated in response to the phenomenon that the freezing point of the lead accumulator is increased by checking the discharge depth in real time.

That is, in the operation of the battery protection system including the life extension and protection function of the battery, which is one embodiment of the present invention, it is possible to estimate the discharge depth which can be used for the charge / discharge characteristics of the lead acid battery used as the battery It is possible to determine the freezing point of the battery, which is a lead-acid battery, in advance and control the driving state of the battery accordingly.

In the case where a super capacitor (carbon super capacitor) is provided as the overcurrent protecting means according to the present invention, even if a large overload is given as a starting power, the super capacitor serving as the first battery for the over power can be used. Discharge cell, which is the second battery, to thereby maximize the battery operation.

The lead-acid battery has characteristics of varying the discharge depth according to temperature. As a means for supplementing the temperature characteristic, a method of covering a heat generating device including carbon fibers on the outer peripheral surface of the lead- It is possible to increase the energy saving effect by using the method of radiating the far infrared ray and providing the radiant heat instead of using the joule heating method of heating the nickel wire while using the lead storage battery as the driving means for the heating device including the fiber In addition, since it uses heat transfer method directly to lead acid batteries, it is possible to save power capacity because it is not necessary to use latent heat for heating the lead acid battery, and it is possible to immediately respond to temperature change characteristics of lead acid batteries.

FIG. 1 is a graph showing the relationship between the discharge depth of a lead-acid battery and the number of charge cycles.
FIG. 2 is a photograph schematically showing an outer appearance of a lead-acid battery which is a secondary battery according to an embodiment of the present invention, surrounded by a carbon heating device including carbon fibers.
3 is a graph showing a capacity change curve of the lead-acid battery according to the temperature change.
Fig. 4 is a schematic view showing the operation principle of a lead-acid battery when an aqueous sulfuric acid solution is used as an electrolyte.
5 is a graph showing the freezing point characteristics of the lead-acid battery according to the progress of charge / discharge process.
FIG. 6 is a block diagram schematically showing a connection state between a lead accumulator, which is a secondary battery, a carbon fiber as a heating device, and a CPU and a controller, which are control devices, according to an embodiment of the present invention.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

Generally, a battery converts chemical energy into electrical energy using a contact potential difference between suitable materials, and the kind thereof is very diverse. As a technical classification of the battery, a primary battery, a lead-acid battery and a Ni-MH battery, which are made of a negative electrode active material, such as a manganese battery, an alkaline battery, a mercury battery and an oxidized silver battery, (Nickel-metal hydride) batteries, milled nickel-cadmium batteries and lithium metal batteries, lithium-ion batteries, and lithium-polymer batteries. A fuel cell for converting the heat of combustion of hydrocarbon into electricity, and a solar cell for converting light energy into electrical energy.

Description of the Related Art [0002] In recent years, not only has a portable electronic device such as a VTR camera, an integrated VTR, an audio, a laptop type personal computer, a portable phone, or a memory card capable of storing and storing vast amounts of data, BACKGROUND ART [0002] Batteries are attracting attention as a new energy source and a power storage device due to the miniaturization, light weight, and accelerated cordlessization of devices. The development of a battery useful as the above-mentioned use should improve the energy density, improve the performance, increase the capacity, and prevent the environment from being contaminated.

The dual primary cell has a low capacity, a short life span, and is not recycled, thereby causing environmental pollution. However, the secondary battery can be recharged and used for a long period of time, and the voltage is superior to that of the primary battery, the efficiency is high, the generation of waste is low, and the environment protection is also excellent.

Among the secondary batteries, the present invention aims at controlling the characteristics of the lead-acid battery having a long life span as an object, and therefore, the description will be limited to this.

2 is a view showing that a carbon heating device 300 including carbon fibers surrounds the outer circumferential surface of the lead-acid battery 110 to reinforce the temperature compensation characteristic of the lead-acid battery according to an embodiment of the present invention.

Referring to FIG. 2, the carbon heating device 300 including carbon fibers may receive power from an external power source. Even if an external power source is used as described above, the power required to maintain a constant temperature in the carbon heating apparatus 300 including carbon fibers is reduced to 1/4 or less compared with the case where tungsten is used as a heating element have.

For example, in the case of a tungsten heating element, a heating method is a resistive heating method, not a radiant heating method of the present invention, and a power of 2 to 3 A at 45 V is required to be used in an embodiment of the present invention In the case of the carbon heating device 300 including the carbon fibers, the temperature of the lead-acid battery 110 according to the present invention can be maintained, The temperature of the lead-acid battery can be maintained at 45 占 폚.

  First, let us first examine the tendency that the discharge depth changes by the temperature of the lead acid battery

3 is a graph showing a capacity change curve of the lead-acid battery according to the temperature change.

Referring to FIG. 3, it can be seen that the battery is 100% charged at 25 DEG C, which is a normal temperature. If the temperature of the lead-acid battery 110 drops in such a state, the usable capacity has a characteristic that it varies greatly depending on the temperature.

That is, at 0 ° C, the battery rated capacity is reduced to 85%, and when the temperature is -20 ° C, the usable capacity is reduced to about 40%.

Therefore, in order to use the lead-acid battery 110 as a secondary battery, it is necessary to use the lead-acid battery 110 at a temperature of -10 ° C or lower to prevent a decrease in the depth of discharge due to the temperature drop.

In this respect, the battery life protection function of the battery protection system 100 including the battery life extension and protection function according to an embodiment of the present invention can be achieved in terms of temperature.

In addition, in the case of the lead-acid battery 110, since the battery protection system 100 does not operate when the freezing point is reached, it is necessary to consider the above.

In order to understand this principle, it will be necessary to study the operation principle of the lead-acid battery 110.

Lead Acid Battery (110) is a secondary battery that has been used for a long time. The positive electrode active material of this battery is PbO 2, and the active material of the negative electrode is Pb, and an aqueous solution of sulfuric acid (H 2 SO 4) is used as an electrolyte.

PbSO4 can be generated when both of these positive electrodes are discharged.

The reaction formula at each electrode can be expressed as shown in reaction formula 1.

[Reaction Scheme 1]

As shown in the reaction formula 1, when the battery is charged (← direction), sulfuric acid is generated due to the reaction, and therefore, the concentration of sulfuric acid is increased. On the contrary, when discharged, .

Fig. 4 is a schematic view showing the operation principle of a lead-acid battery when an aqueous sulfuric acid solution is used as an electrolyte.

 Referring to FIG. 4, it can be seen that the discharging process is performed while the aqueous solution of sulfuric acid is changed to PbSO 4, and the charging process is performed while the PbSO 4 is changed to the aqueous sulfuric acid solution.

In this way, it can be easily predicted that the freezing point of the electrolyte solution will change from the change of the amount of H 2 O and the aqueous sulfuric acid solution during the charging / discharging process.

5 is a graph showing the freezing point characteristics of the lead-acid battery according to the progress of charge / discharge process.

Referring to FIG. 5, at the time of complete discharge, the aqueous sulfuric acid solution is almost converted to PbSO4, so that the freezing point depression phenomenon due to ionization (addition of sulfate ion to water) occurs little, Experimentally, the freezing point is generated at -8 ° C. On the contrary, it can be easily predicted that in the charge reaction in which sulfuric acid is produced, the freezing point occurs at -57 ° C.

As can be seen from the freezing point characteristic curve shown in Fig. 5, when the capacity is only 60%, a freezing point, which is a freezing point at -30 캜, is generated. As described above with reference to FIG. 3, when a slight discharge occurs due to a state in which 40% of the capacity is lost at -20 ° C., the lead storage battery 110 becomes a freezing point and the battery protection system 100 can be stopped The situation is unfolded.

Therefore, in order for the solution contained in the lead acid battery 110 to drive the battery protection system 100, the temperature compensation for the lead acid battery 110 must be performed.

The meaning of temperature compensation may vary slightly depending on the element used. However, the concept of temperature compensation in electronic circuits and components is a function of temperature, The temperature compensation is built in the control circuit to help the constant performance regardless of the ambient temperature change.

If a conventional electric heater such as tungsten (W) is used to compensate the temperature, the power consumption is too high (in the above example, the temperature must be compensated by the condition of consuming the voltage of 45V and the current of 2 to 3A) However, in the battery system 100 including the life extension and protection function of the battery of the present invention, the carbon heating device 300 including carbon fibers using a voltage of 12 V and a power of less than 1 A, It is possible to heat the lead acid battery 110 by a radiation method other than joule heating so that it is possible to compensate the temperature of the lead acid battery 110 which is an efficient battery compared to the power consumption and the use capacity of the lead acid battery 110 increases In addition, the battery protection system 100 can be normally operated for a long time.

At this time, when the used capacity of the lead acid battery 110 becomes 85% or less, the lead battery 110 and the battery protection system 100 apply the self-protection algorithm to keep the discharge capacity of the lead acid battery within 20% The lifetime of the lead-acid battery 110 can be prolonged.

The carbon heating device 300 includes a carbon fiber yarn and a carbon fiber yarn. The carbon fiber yarn 300 is formed on a part or a plurality of parts of the heating part. The carbon fiber yarn 300 is woven with a carbon fiber yarn to conduct heat to the heating part. And the carbon portion is applied to the conductive portion to strengthen the bonding force of the conductive portion, so that the stability of the shape can be maintained as long as the excessive physical force is not applied.

Wherein the regular fiber yarns of the heat generating portion are twisted to form a twisted twisted portion and the carbon fiber yarn is passed through the twisted portion of the normal fiber yarn so that the interval and the number of twists of the normal fiber yarn and the arrangement And the density and the calorific value of the heating unit can be adjusted according to the temperature of the heating unit.

Since the carbon fiber yarn can be heated by radiant heating, it is possible to heat and heat the lead-acid battery 110 without reducing the energy consumption by latent heat while reducing current consumption. 110 can achieve a temperature compensation effect with a small amount of power consumption.

In particular, since the power is supplied through the relay 230, the temperature of the lead-acid battery 110 can be freely adjusted according to the required temperature.

The temperature compensation of the lead acid battery 110 is freely performed, so that it is possible to achieve a function of ensuring battery life in a lead acid battery, which is a deep cycle battery.

The second function is to describe the Depth of Discharge by the instantaneous overcurrent flow. It is possible to use the LAMP, the electric signboard, the warning light, An example is the use of a siren or speaker amp.

That is, when the discharge capacity (DOD) is 20% or more, the number of times of charging the lead acid battery 110 is reduced and the life of the lead acid battery 110 is reduced.

As a countermeasure thereto, a carbon super capacitor is used in the present invention. Such a supercapacitor can be referred to as a first battery.

A super capacitor is a capacitor with a very high capacitance. It is called an ultra capacitor or a supercapacitor in Korean. In academic terms, it is distinguished from an electrostatic or electrolytic capacitor and is called an electrochemical capacitor. Unlike a battery using a chemical reaction, a supercapacitor utilizes a phenomenon caused by a simple ion movement or surface chemical reaction between an electrode and an electrolyte interface. As a result, it can be rapidly charged and discharged, and it is attracting attention as a next generation energy storage device which can be used as a secondary battery or a battery replacement due to high charge / discharge efficiency and semi-permanent cycle life characteristics.

This next generation energy storage device, supercapacitor, can store and use a large amount of electricity quickly, can use it, and it is 100 times more power than secondary battery and it can be used semi-permanently, and various applications such as cell phone digital camera flash and hybrid automobile are various .

In other words, supercapacitors are considered to be important as new and renewable energy storage devices such as sunlight, wind power, and hydrogen fuel cell, which are eco-friendly clean alternative energy that does not emit carbon dioxide by replacing petroleum.

The super capacitor has no dielectric material, which is a unique material used in conventional capacitors, and does not utilize a chemical reaction in charge and discharge like a battery. The feature is that it uses a large surface area activated carbon and shortens the distance of the dielectric to obtain a very large electrostatic capacity in F unit and does not affect the lifetime like overcharged or overdischarged battery, .

Since it can be attached by solder as an electronic component, short circuit and connection instability do not occur like a secondary battery. Compared with a secondary battery using a conventional electrochemical reaction, the super capacitor uses a method of physically storing the charge itself, so that the charge / discharge time can be controlled, and a long lifetime and high energy density can be obtained.

Table 1 is a table comparing characteristics of various electric energy storage devices.

Comparison table of electric energy storage devices Compare lead Nickel cadmium Super capacitor Power density (W / kg) 100-130 100-160 10-300 Energy density (Wh / Kg) 40-45 45-53 (memory effect) 2-4 (15-40) Discharge depth (%) 50-70 80-100 94-100 Cycle life 300-1000 300-500 10000- Charging efficiency -0.82 -0.72 -0.95 Remainder measurement Difficulty (~ 30%) Difficulty (~ 25%) Easy (~ 10%) Charging time 5-10 hr 15min-8hr 3-30sec

As shown in Table 1, in recent years, the secondary battery has superior charging / discharging speed and cycle life compared to secondary batteries, and is attracting attention as a combined use of secondary batteries and an alternative energy storage device. A super capacitor is used as the first battery when the LAMP, the electric signboard, the warning light, the siren or the speaker amp, which is expected to consume electric power due to the overcurrent, is used as the first battery, (A current which does not generate a DOD of 20% or more) through the measurement of the current flowing through the first battery after the occurrence of the DOD of 20% or more at the moment), the lead battery 110 ) Can be applied.

When the battery protection system 100 including the extension and protection function of the battery is mounted by mounting a super capacitor serving as a first battery on one side of the lead battery 110 as the second battery, .

Hereinafter, an operation method of the battery protection system including the battery life extension and protection function, which is one embodiment of the present invention, will be discussed.

The battery protection system 100 including the battery life extension function and the protection function may be configured such that when using the LAMP, the electric signboard, the warning light, the siren or the speaker amp, The step (s10) of protecting the lead acid battery 110, which is the second battery, from the overcurrent flow may be performed using the super capacitor as the first battery. This process is the means for extending the life of the second lead battery 110 as described above.

When a predetermined time passes after the transient current flows, the operation proceeds to step s20 where a normal current flows. At this time, the operation of the super capacitor serving as the first battery is stopped and the operation of the lead battery 110 Can be achieved.

In the case of the lead-acid battery 110, there is a specific temperature characteristic. Thus, in the middle of driving the second battery, a temperature measurement means (mainly a thermocouple can be used) for the second battery And temperature compensation can be performed.

6 is a block diagram showing the overall configuration of a battery protection system 100 equipped with a battery life extension and protection function according to an embodiment of the present invention.

Referring to FIG. 6, a lead battery 110, which is a secondary battery capable of performing a charging function and a discharging function, and the charging function and the discharging function are opposite to each other. In order to maximize the number of times of recovery, A carbon heating device 300 capable of protecting a lead-acid battery that is a battery, and a controller 200 capable of adjusting the driving state of the carbon heating device 300. [

The controller 200 may include a central control unit 220 and a relay 230.

The relay 230 is electrically connected to the carbon heating device 300 and can perform an ON / OFF function. The battery protection system 100 can be protected (s20-s50) by maintaining the temperature of the lead acid battery 110 at -10 to 0 DEG C by using a PID (Proportional Integral Derivative) method as a control method.

At this time, in response to the phenomenon that the freezing point of the lead-acid battery 110 becomes high by checking the discharge depth (DOD) which is directly related to the number of times of charging / discharging of the lead-acid battery 110 in real time, The battery protection system 100 can be protected by stopping the operation of the lead acid battery 110. [

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

100: Battery protection system 110: Lead-acid battery
120: On / Humidity sensor 200: Controller
210: Temperature and humidity sensor connecting means 220: CPU
230: Relay 300; Carbon heating device

Claims (4)

A lead-acid battery which is a secondary battery capable of performing charging and discharging functions;
A thermocouple which is a temperature sensor capable of measuring the temperature of the lead-acid battery;
The temperature of the lead-acid battery can be determined from the thermocouple,
The carbon heating device including the carbon fibers is wound around the outer circumferential surface of the lead accumulator to increase the heat retaining performance of the lead accumulator and directly transmit the heat generated from the heating device to the lead accumulator, The discharge depth of the lead-acid battery is prevented from being lowered,
The carbon heating element is electrically connected to the lead accumulator through a relay so that power can be supplied to and disconnected from the lead accumulator and the carbon heating device is connected to the outer surface of the lead accumulator The battery can be heated and transferred to the lead-acid battery without energy storage due to latent heat, so that current consumption of the lead-acid battery can be reduced,
The relay supplies electric power to the carbon fiber, which is the carbon heating device, at -10 ° C according to the temperature measurement result of the thermocouple connected to one side of the lead acid battery, When the temperature of the lead-acid battery reaches 0 ° C, the PID (Proportional Integral Derivative) method of cutting off power supplied to the carbon fiber, which is the carbon heating device, ),
A method of directly heating the carbon heating device including carbon fiber to the outer circumferential surface of the lead accumulator and transferring the heat generated from the carbon heating device directly to the lead accumulator,
The temperature compensation function of the lead-acid battery is realized,
When a lamp, an electric signboard, a warning light, a siren, or a speaker amp, which is expected to consume power instantaneously due to an overcurrent, is used at one side of the lead acid battery,
A super capacitor can be used as the first battery by using the LAMP, the electric signboard, the warning light, the siren or the speaker amp so that a depth of discharge (DOD) of 20% Can be prevented. However,
The use of the supercapacitor as the first battery is performed by measuring a current flowing through the first battery, a normal current (here, a normal current refers to a discharge current of 20% or more when the lead- The super capacitor, which is the first battery, is stopped,
By driving the lead battery which is the second battery,
The lead-acid battery is prevented from reaching a freezing point and the use of the battery is stopped.
delete delete A thermocouple which is a temperature sensor capable of measuring the temperature of the lead accumulator battery, a thermocouple capable of judging the temperature of the lead acid battery from the thermocouple, The carbon heat generating device including carbon fiber is wound around the outer circumferential surface of the lead accumulator to increase the heat retaining performance of the lead accumulator and directly transmit the heat generated from the carbon heating device to the lead accumulator, The discharge depth of the lead-acid battery is prevented from being lowered, The carbon heating element is electrically connected to the lead accumulator through a relay so that power can be supplied to and disconnected from the lead accumulator and the carbon heating device is connected to the outer surface of the lead accumulator The battery can be heated and transferred to the lead-acid battery without energy storage due to latent heat, so that current consumption of the lead-acid battery can be reduced, The relay supplies electric power to the carbon fiber, which is the carbon heating device, at -10 ° C according to the temperature measurement result of the thermocouple connected to one side of the lead acid battery, When the temperature of the lead-acid battery reaches 0 ° C, the PID (Proportional Integral Derivative) method of cutting off power supplied to the carbon fiber, which is the carbon heating device, ) Is controlled so that the carbon heating device including the carbon fibers is wound around the outer circumferential surface of the lead accumulator and the heat generated by the carbon heating device is directly transferred to the lead accumulator. It includes the life extension and protection function of the battery which realizes the temperature compensation function of the lead acid battery below -10 ℃. Is a method of operating a battery protection system,
Power consumption due to overcurrent is expected instantly at one side of the lead-acid battery When a LAMP, an electric signboard, a warning light, a siren or a speaker amp is used,
(1) a step (s10) of protecting a lead-acid battery which is a second battery from an overcurrent flow by using a supercapacitor which is a first battery;
(2) a step (s20) of driving using a second lead acid battery when a normal current flows;
(3) During the use of the lead-acid battery, in order to prevent a decrease in the depth of discharge of the lead-acid battery due to the ambient temperature drop of the lead-acid battery, a carbon heating device A step (s30) of checking the temperature of the lead accumulator battery by electrically connecting the lead accumulator and the carbon heating device through relays;
(4) driving the carbon heating device when the temperature of the lead accumulator is not higher than -10 ° C (s40); And
(5) stopping the driving of the carbon heating device including the carbon fibers when the temperature of the lead accumulator is 0 DEG C or more (s50)
The operation of the lead accumulator, which is the second battery, is stopped in response to the phenomenon that the discharge depth of the lead accumulator is directly related to the number of times of charge and discharge of the lead accumulator, Extending and protecting the battery.

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