KR20210133441A - container system for transportation and fast state of health assessment of reuse battery - Google Patents

Abstract

In order to improve economic feasibility, provided is a container system for reuse battery transportation and aging high-speed measurement. The system includes: a transportation container in which a plurality of reuse batteries are selectively stored; a plurality of socket parts placed in the transportation container while provided to enable each of the reuse batteries to be individually power-connected and communication-connected; a power supply part power-connected to each of the socket parts and provided to charge and discharge each of the reuse batteries with a power source for aging measurement; a distribution control part circuit-connected to the power supply part and performing a control operation so as to charge and discharge each of the reuse batteries, which are connected with each of the socket parts, with the power source; and an aging measurement calculation part measuring a voltage through the repetition of the charge/discharge of the reuse batteries connected with the socket parts, and calculating a total energy storage amount based on the measured voltage.

Description

Container system for transportation and aging high-speed measurement of reused batteries {container system for transportation and fast state of health assessment of reuse battery}

The present invention relates to a container system for high-speed measurement of reusable battery transportation and aging, and more particularly, to a container system for transportation of reused batteries and high-speed aging measurement with improved economic feasibility.

Recently, with the spread of electric vehicles, technologies for recycling battery packs of electric vehicles that have been used for the first time are being actively studied.

Here, for the smooth recycling of the electric vehicle battery pack, it is very important to properly diagnose the health condition of the battery pack that has been used for the first time, predict its residual value scientifically, and provide it to an appropriate application field for recycling.

In detail, a battery pack that has been used in an electric vehicle has a reduced total capacity for charging and discharging electric energy compared to a new battery pack, but still has enough energy storage performance to be safely used in many fields. At this time, a technology for measuring the total amount of energy stored inside a battery pack to be recycled and appropriately quantifying the utilization of the battery is required.

In this case, two methods are commonly used for measuring the total energy storage amount of the battery.

First, as the most common OCV method, there is a method of measuring using the correlation between the open circuit voltage (OCV) and the state of charge (SOC) of the battery. Here, a table or graph recording the correlation between OCV and SOC is provided by the battery manufacturer at the time of shipment. Although this method is a relatively simple method, if the battery is in a relatively healthy state before aging and the accurate OCV value is measured, the measurement accuracy is excellent. However, in order to accurately measure OCV, the voltage must be measured after the battery is stabilized in an open circuit state for a long period of time.

The second method is the Coulomb Counting Method, which continuously measures and integrates the amount of current used when the battery is fully charged, and then divides it by the total energy storage provided by the battery company to calculate the SOC. Although it is relatively accurate to measure the amount of energy used because it integrates the amount of current actually used, the total energy storage provided by the battery manufacturer decreases with the aging of the battery. There is a disadvantage in that it is inaccurate to predict the amount of remaining electric energy. When using the current integration method, the accuracy can be improved if the total energy storage of the battery is frequently measured and updated. It takes a lot of work, so in reality it is very difficult.

As described above, the method for monitoring the state of the battery according to the prior art takes a lot of time, and if it is not suitable for a vehicle used in real time, it is necessary to develop a method for measuring the state of the battery within a relatively short time.

Meanwhile, a container mounted on a vehicle is being researched and developed in order to transport reused batteries in bulk. Here, after loading the reusable battery in the container, the reusable battery was transported to a place to inspect the aging of the battery.

However, since the conventional container does not have a cooling function for managing the reused battery, there is a problem in that it is difficult to respond to an explosion due to an abnormal occurrence of the reused battery.

In addition, in the related art, since the aging test is carried out only after loading the reused battery in the container and then transporting it to a place for checking the deterioration, the total time required for transportation and inspection is long, thereby reducing economic efficiency.

Korean Patent Registration No. 10-2051009

In order to solve the above problems, an object of the present invention is to provide a container system for high-speed measurement of aging and transportation of reusable batteries with improved economic feasibility.

In order to solve the above problems, the present invention is a transport container in which a plurality of reused batteries are selectively stored; a plurality of socket units disposed inside the transport container and provided so that each of the reusable batteries is individually power-connected and communicatively connected; a power supply connected to each of the sockets and provided to charge and discharge power for aging measurement to each of the reused batteries; a distribution control unit circuit connected to the power supply unit and controlling the charging and discharging of power to each of the reused batteries connected to each of the socket units; and an aging measurement operation unit for measuring a voltage through repeated charging and discharging of each of the reuse batteries connected to the socket unit, and calculating a total energy storage amount based on the measured voltage. provide the system.

Through the above solution means, the present invention provides the following effects.

First, the total energy storage amount is calculated from the voltage measured through repeated charging and discharging of the reused battery being transported inside the transport container after the primary use is completed to determine the aging state, so the time for transporting the reused battery is checked for the reusable battery And the total time required by using it as a time for screening can be minimized, so that economic efficiency can be significantly improved.

Second, when the distribution control unit sequentially controls individual charging and discharging of power to a plurality of reusable batteries, the aging measurement operation unit sequentially measures the voltage of each reusable battery according to the charging and discharging execution and calculates the total energy storage amount, so Aging state discrimination can be performed independently of each other, so that inspection precision can be significantly improved.

Third, additional power for battery temperature management as it stores the discharged electricity generated in the process of determining the aging state of each reusable battery and calculating the total amount of stored energy in the buffer battery and supplies it as power to maintain the temperature inside the transport container Energy efficiency can be remarkably improved since the source is substantially not required.

1 is an exemplary view showing a container system for high-speed aging and transportation of reusable batteries according to an embodiment of the present invention.
Figure 2 is a block diagram showing a container system for high-speed aging and transportation of reusable batteries according to an embodiment of the present invention.
3 is a graph showing an open circuit voltage-battery state of charge characteristic curve of a reused battery in a container system for high-speed measurement of transport and aging of a reused battery according to an embodiment of the present invention.
Figure 4 is a graph showing a method of calculating the total energy storage of the reused battery in the container system for high-speed measurement of transport and aging of the reused battery according to an embodiment of the present invention.
5 is a graph showing a measurement position of a reuse battery management method in a container system for high-speed measurement of reused battery transportation and aging according to an embodiment of the present invention.
6 is a graph showing a measurement principle of a reuse battery management method in a container system for high-speed aging and transportation of reused batteries according to an embodiment of the present invention.
7 is a graph showing a reuse battery management method in a container system for high-speed measurement of transport and aging of reused batteries according to an embodiment of the present invention.
8 is a graph showing a reuse battery management method in a container system for high-speed measurement of reused battery transportation and aging according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a container system for transporting reused batteries and measuring aging at high speed according to a preferred embodiment of the present invention will be described in detail.

1 is an exemplary view showing a container system for high-speed measurement of reusable battery transportation and aging according to an embodiment of the present invention, and FIG. 2 is a container system for high-speed measurement of reused battery transportation and aging according to an embodiment of the present invention It is a block diagram.

Here, the reusable battery includes a secondary battery capable of charging electrons, such as a lead acid battery, a nickel cadmium battery, a lithium polymer battery, a lithium ion battery, a nickel hydride battery, and the like. In addition, it is preferable to understand that the reuse battery is used as a concept encompassing a battery pack, a battery module, and a battery cell. In this case, the battery module or battery cell may be used in a state in which the battery pack is unloaded.

In addition, the container system for transporting reusable batteries and measuring aging at high speed of the present invention transports batteries for recycling of batteries that have been used for primary use in electric vehicles, etc. It is a system for sorting reusable batteries.

In addition, the container system for transporting reusable batteries and measuring aging at high speed of the present invention is equipped with a temperature control function in the container for transporting the batteries recovered after the primary use is completed, so that it is possible to ensure the safe transportation of the batteries.

1 to 2, the container system 100 for high-speed measurement of reusable battery transportation and aging according to an embodiment of the present invention includes a transportation container 10, a socket unit 20, a power supply unit 30, It includes a distribution control unit 40 and an aging measurement operation unit 50 .

In detail, the transport container 10 has a receiving space therein so that a plurality of reused batteries 1 are selectively stored. Here, the transport container 10 may include a body having the accommodating space therein, and a door connected to the body and provided to selectively open the accommodating space. At this time, in an embodiment of the present invention, the case where the transport container 10 is provided in a freight vehicle is illustrated and described as an example, but is not limited thereto.

Here, each of the reusable batteries 1 is provided in plurality and may be loaded in the transport container 10 along the longitudinal direction, the transverse direction and the height direction. In addition, each of the reusable batteries 1 may be selectively fixed by a fixing means (not shown) arranged in alignment in the receiving space. In this case, the fixing means (not shown) may be provided so that each of the reused batteries 1 is stored inside the transport container 10 . In addition, in some cases, a shock absorbing means (not shown) may be further provided inside the transport container 10 to absorb shocks from the outside when the transport container 10 is transported.

On the other hand, the socket unit 20 is provided in plurality and arranged inside the transport container 10 so that each of the reusable batteries 1 is individually connected to power and communication through a cable. In this case, the cable may include a plurality of communication cables and a plurality of power charging/discharging high voltage cables.

Here, the socket unit 20 is a plurality of CAN communication inputs in which the other end of the communication cable having one end connected to each of the reuse batteries 1 is selectively connected to each of the reuse batteries 1 and CAN communication connection. It is preferable to include a socket 21 .

In addition, the socket unit 20 includes a plurality of high voltage cable input sockets 22 to which the other end of the high voltage cable having one end connected to each reuse battery 1 is selectively connected so as to be connected to each of the reuse batteries 1 and high voltage power supply. ) is preferably included.

At this time, it is preferable that one can communication input socket 21 and one high voltage cable input socket 22 are set and connected to one reuse battery 1 .

Through this, each of the reusable batteries 1 is connected to the CAN communication input socket 21 through the communication cable and at the same time connected to the high voltage cable input socket 22 through the high voltage cable to the power supply unit 30 , the distribution control unit 40, the aging measurement operation unit 50 and the temperature measurement unit 61 may be connected to power or communication, respectively.

On the other hand, it is preferable that the power supply unit 30 includes a main battery 31 which is connected to the power supply to each of the socket units 20 and is provided to charge and discharge power for aging measurement to each of the reuse batteries 1 . . In this case, the main battery 31 may be provided as a battery pack, but is not limited thereto.

Here, the main battery 31 may be power-connected to each of the reused batteries 1 through each of the high voltage cable input socket 22 and each of the high voltage cables. Through this, the power stored in the main battery 31 may be charged and discharged to each of the reused batteries 1 to measure the aging of the batteries, and the aging of each of the reused batteries 1 may be measured. Detailed description will be given later.

In addition, it is preferable that the power supply unit 30 includes a buffer battery 32 that is connected to each of the socket units 20 with power and stores the discharge electricity generated during the aging measurement of each reuse battery 1 . In this case, the buffer battery 32 may be provided as a battery pack, but is not limited thereto.

Here, the buffer battery 32 may be power-connected to each of the reusable batteries 1 through each of the high voltage cable input socket 22 and each of the high voltage cables. Through this, as the electricity charged in each reuse battery 1 is discharged from the main battery 31 for battery aging measurement, it is stored in the buffer battery 32 .

At this time, the buffer battery 32 stores the discharge electricity generated during the aging measurement of each of the reuse batteries 1 to be described later by a temperature control device 60 , a display unit 70 , an internal camera 71 , and a fire extinguishing device. (72) and the like are provided to supply power.

That is, the discharging electricity of each reuse battery 1, which is a necessary process in measuring the aging of each reuse battery 1 and the total amount of storable energy storage, is temporarily stored in the buffer battery 32 to store the transport container (10) It is used as a function of maintaining an appropriate internal temperature, is used as an auxiliary power source necessary for driving the vehicle, and when the transport truck is an electric vehicle or a hydrogen fuel cell vehicle, a part of the driving energy can be supported so that electrical energy is wasted can be minimized. In addition, by measuring the aging of the reusable battery 1 during transport, it is possible to minimize the working time.

Here, the power supply unit 30 may be provided as a replaceable battery set, and when provided in a vehicle, it may be connected to a generator connected to the vehicle engine to receive power.

In addition, the container system 100 for high-speed measurement of reusable battery transportation and aging has an input terminal connected to an output terminal of the buffer battery 32 to convert high voltage DC power supplied from the buffer battery 32 into AC power. It is preferable to further include an AC inverter 62 . In this case, the DC-AC inverter 62 is preferably provided between the output terminal of the buffer battery 32 and the input terminal of the temperature control device 60 to be described later.

In addition, the container system 100 for transporting the reused battery and measuring aging at high speed is connected to the buffer battery 32 with the DC-AC inverter 62 through the power supply to receive the discharge electricity and the aging measurement operation unit 50 . and the temperature control device 60 for selectively cooling and heating so that the temperature inside the transport container 10 is maintained at a temperature within a preset range is preferably further included.

Here, the constant temperature control device 60 preferably includes a temperature measurement unit 61 , a temperature control unit 60a , and a cooling device 60b .

In detail, the temperature measuring unit 61 is circuit-connected to each of the socket units 20 and transmits a temperature signal from the BMS unit provided in the reusable battery 1 to measure the temperature of each reusable battery 1 . It is desirable to have a communication connection to receive.

In this case, the temperature measuring unit 61 may be communicatively connected to each of the reuse batteries 1 through each of the CAN communication input sockets 21 and each of the communication cables. In addition, in some cases, the temperature measuring unit 61 may further include a temperature sensor (not shown) for directly measuring the temperature inside the transport container 10 .

In addition, the temperature data of each reused battery 1 measured through the temperature measuring unit 61 may be transmitted to the temperature control unit 60a and the display unit 70 to be described later.

In addition, the temperature control unit 60a is preferably provided to selectively control cooling and heating so that the temperature inside the transport container 10 measured by the temperature measuring unit 61 is maintained at a temperature within a preset range.

At this time, the temperature control unit 60a receives the temperature data from the BMS unit of the reuse battery 1 through the can communication through the temperature measurement unit 61 to control the cooling device 60b, and in case of an emergency, it will be described later. It is preferable to drive and control the fire extinguishing device 70 to be used.

The cooling device 60b is provided inside the transport container and is preferably driven by power supplied from the buffer battery 32 through the DC-AC inverter 62 .

Here, the temperature control unit 60a may apply a driving signal to the cooling device 60b when the temperature inside the transport container 10 measured by the temperature measuring unit 61 exceeds a preset temperature. .

Accordingly, when the temperature inside the transport container 10 measured by the temperature measuring unit 61 exceeds a preset temperature, the temperature control unit 60a applies a driving signal to the cooling device 60b to As the cooling device 60b is driven, the reusable battery 1 may be protected from fire risk.

Of course, in some cases, the temperature control device 60 may further include a heater (not shown). At this time, the temperature control unit 60a may apply a driving signal to the heater (not shown) when the temperature inside the transport container 10 measured by the temperature measuring unit 61 is less than a preset temperature. Accordingly, in an external low temperature environment such as winter, the temperature inside the transport container 10 is maintained in a temperature range above a preset temperature, so that the reused battery 1 can be safely transported.

On the other hand, the container system 100 for high-speed measurement of reusable battery transportation and aging is disposed inside the transportation container 10 and an internal camera 71 that acquires and transmits image data for the inside of the transportation container 10 in real time. may include

Here, the internal camera 71 may be mounted on the inner wall surface of the transport container 10 so as to be able to switch up, down, left, and right directions, and transmits the image data in real time to the external display unit 70a to be described later. desirable. In this case, the image data may include image data for the internal appearance of the transport container 10 and image data for the storage state of each of the reused batteries 1 .

In addition, the container system 100 for high-speed measurement of reusable battery transportation and aging may include a display unit 70 on which temperature data inside the transportation container 10 measured by the temperature measurement unit 61 is displayed. .

In detail, the display unit 70 may include an external display unit 70a disposed outside the movement container 10 and an internal display unit 70b disposed inside the transport container 10 .

Here, the temperature data inside the transport container 10 measured by the temperature measuring unit 61 is displayed on the external display unit 70a, and the image data obtained from the internal camera 71 is displayed, The voltage data calculated by the aging measurement operation unit 50 may be displayed.

In this case, the external display unit 70a may be installed in the driver's seat 11 of the vehicle. In addition, a touch manipulation unit (not shown) is further provided on the external display unit 70a to selectively control the direction change of the internal camera 71 .

And, the temperature data inside the transport container 10 measured by the temperature measurement unit 61 is displayed on the internal display unit 70b, and the voltage data calculated by the aging measurement operation unit 50 can be displayed. have.

Furthermore, a warning signal transmitted from the temperature control unit 60a may be displayed on the external display unit 70a and the internal display unit 70b when the temperature inside the transport container 10 exceeds a preset temperature. have.

On the other hand, the container system 100 for transporting reusable batteries and measuring aging at high speed is provided on the inner ceiling surface of the transport container 10 and is controlled by the temperature control unit 60a to spray gas extinguishing liquid for rapid cooling in case of fire. It may include a fire extinguishing device 72 provided.

Here, the temperature control unit 60a may drive and control the fire extinguishing device 72 when the temperature inside the transport container 10 measured by the temperature measuring unit 61 exceeds a safe temperature. At the same time, the temperature control unit 60a may transmit a fire warning signal to the external display unit 70a when the temperature inside the transport container 10 measured by the temperature measuring unit 61 exceeds a safe temperature. have.

Accordingly, when the temperature inside the transport container 10 exceeds the safe temperature due to overheating of the reusable battery 1, the gas extinguishing liquid for rapid cooling is automatically injected into each battery 1 to suppress the fire in the early stage. Therefore, the safety of use can be improved. Of course, in some cases, the fire extinguishing device 72 may be manually driven and controlled by a manual operation of a touch operation unit (not shown) of the external display unit 70a.

On the other hand, referring to FIG. 2 , the distribution control unit 40 is circuit-connected to the power supply unit 30 and controls to charge/discharge power to each of the reuse batteries 1 connected to each of the socket units 20 . desirable.

In addition, the aging measurement operation unit 50 sequentially and individually measures the voltage through repeated charging and discharging of each of the reuse batteries 1 connected to each of the socket units 20 , and based on the measured voltage, total energy It is preferable to calculate the amount of storage. At this time, it is preferable that the aging state measurement for each of the reused batteries 1 is performed independently of each other.

Here, it is preferable that the distribution control unit 40 controls to individually charge and discharge power to each of the reused batteries 1 in sequence. In addition, it is preferable that the aging measurement operation unit 50 sequentially and individually measures the voltage of each of the reused batteries 1 according to the charging and discharging of the power supply unit 30 .

At this time, the aging measurement operation unit 50 calculates the battery charge state (SOC) from the preset open circuit voltage-battery charge state (OCV-SOC) characteristic curve of the reused battery 1 according to the measured voltage, and each It is preferable that the total energy storage amount of the reusable battery 1 is sequentially individually calculated. At this time, the aging measurement operation unit 50 is provided as a relay circuit and can be circuit-connected to each of the reused batteries 1 , and through this, it is preferable that the aging state measurement for each of the reused batteries 1 is performed independently of each other.

In detail, when describing the process of calculating the total energy storage amount of each reuse battery 1 , first, the distribution control unit 40 provides the power supply unit 30 with a first charge/discharge and a second charge for each of the reuse batteries. Execute the discharging, and the aging measurement operation unit 50 calculates the first voltage according to the open circuit of the reused battery 1 after the first time elapses between immediately after the first charging and discharging and before reaching the voltage stabilization, and the second It is preferable to measure the second voltage according to the open circuit of the battery 1 for use after the lapse of a second time equal to the first time between immediately after charging and discharging and reaching the voltage stabilization.

And, the aging measurement operation unit 50 is a preset open circuit voltage of the reusable battery 1 - a first SOC value (SOC ₁ ) for the first voltage in the battery charge state (OCV-SOC) characteristic curve and the It is preferable to calculate a second SOC value (SOC ₂ ) for the second voltage, and to calculate the total energy storage amount of the reuse battery 1 using the first SOC value and the second SOC value.

In addition, the container system 100 for high-speed measurement of reusable battery transportation and aging preferably includes a data storage unit 41 that stores voltage, state of charge (SOC) value, and total energy storage as data at each measurement period. In this case, the data storage unit 41 may be circuit-connected to the display unit 70 to display charging and replacement times of the reused battery 1 to determine charging and replacement times.

On the other hand, FIG. 3 is a graph showing the open circuit voltage of the reused battery in the container system for high-speed measurement of the transport and aging of the reused battery according to an embodiment of the present invention-battery state of charge characteristic curve, and FIG. 4 is an embodiment of the present invention. It is a graph showing a method of calculating the total energy storage amount of a reused battery in a container system for high-speed measurement of recycling and aging of batteries according to It is a graph showing the measurement location of the management method, and FIG. 6 is a graph showing the measurement principle of the reuse battery management method in the container system for high-speed measurement of reused battery transportation and aging according to an embodiment of the present invention, and FIG. 7 is a graph of the present invention. It is a graph showing a reuse battery management method in a container system for high-speed aging measurement and transportation of a reused battery according to an embodiment, and FIG. 8 is a reuse battery management in a container system for high-speed measurement of a reused battery and aging according to an embodiment of the present invention. This is a graph showing the method.

On the other hand, in FIG. 3, an open circuit voltage (OCV)-state of charge (SOC) characteristic curve (hereinafter 'OCV-SOC characteristic curve') of a reusable battery (hereinafter 'battery') is shown. have. This characteristic curve is only an example and may vary for each battery. The battery has a characteristic of varying voltage depending on the state of charge (hereinafter referred to as 'SOC'), and this is indicated by the OCV-SOC characteristic curve. The OCV-SOC characteristic curve is provided by the battery manufacturer when the battery is shipped. If there is no OCV-SOC characteristic curve, it is possible to conduct an experiment on the battery in advance in a laboratory, etc. and obtain the OCV-SOC characteristic curve for the battery in its current state.

At this time, although this embodiment presents the OCV-SOC characteristic curve in the form of a graph, it is also provided in the form of a table. It goes without saying that an OCV-SOC characteristic curve can be created by matching the OCV and SOC values provided in the table. Using this OCV-SOC characteristic curve, the current SOC value of the battery can be estimated by measuring the open circuit voltage of the battery.

And, referring to FIG. 3 , it can be seen that the voltages in the charging and discharging states of the battery are non-linearly changing in the fully charged and discharged states. 3 shows the SOC value as a ratio (%) of the energy storage amount in the current state to the total energy storage amount in the buffer state.

Hereinafter, a general method of calculating the total energy storage amount of a battery will be described with reference to FIG. 4 .

First, as a method of measuring the total energy storage remaining in the battery, the SOC value (SOC ₁ ) at the first specific time and the SOC value at another second specific time ( A method _{of calculating SOC 2} ) and calculating the total energy storage amount (Q _max ) using Equation 1 below based on the difference has been proposed.

이다.here,

am.

However, the OCV-SOC characteristic curve is used to calculate the SOC value (SOC ₁ ) at the first specific time and the SOC value (SOC _{2 ) at the second specific time.} As shown in Fig. 4, in a state in which charging and discharging of the battery does not occur, the voltage must go through a voltage stabilizer in which the voltage is stabilized to a constant value.

Therefore, since at least two voltage stabilization times must pass to measure the SOC value at the first specific time (SOC ₁ ) and the SOC value at the second specific time (SOC ₂ ), the total energy storage of the battery (Q _max ) It takes a lot of time to calculate.

And, referring to FIG. 4 , it can be seen that the voltage of the battery rapidly drops while the first discharge is performed, and when the first discharge is stopped, the voltage rises rapidly and then reaches the voltage stabilizer very slowly. At this time, the SOC value (SOC ₁ ) at the first specific time is calculated through the OCV-SOC characteristic curve. After that, when the second discharge is applied again and stopped, the voltage rises again very slowly, and then reaches the voltage stabilizer again, and the SOC value (SOC ₂ ) at the second specific time is again calculated through the OCV-SOC characteristic curve. As described above, it can be seen that it takes a lot of time to calculate _{the total energy storage amount (Q max} ) of the battery because at least two voltage stabilization times must pass.

Accordingly, the present invention proposes a method for efficiently managing a battery by calculating the total energy storage amount remaining in the battery by minimizing the time for calculating the _{SOC 1} value and the SOC _{2 value.}

Hereinafter, a measurement principle of the battery management method will be described with reference to FIGS. 5 and 6 .

Here, FIG. 5 shows that the measurement steps are set according to the level of the SOC value according to the battery management method according to the present embodiment. In Measurement I, the SOC value of the battery is about 90%, and in Measurement II, the SOC value of the battery is 70%. In degree, measurement III means that the state of the battery is checked by calculating the total energy storage when the SOC value of the battery is about 40%.

6 is a diagram for explaining a measurement principle of the battery management method according to the present embodiment. According to the applicant's experiment, when the second discharge is executed again without much time passing after the first discharge, as shown in FIG. 6 , the voltage is recovered immediately after the first discharge and immediately after the second discharge. It was found that the patterns were the same or similar.

In this case, the meaning of 'the second discharge is executed again without a long period of time after the first discharge' means that the time difference between the execution of the first discharge and the execution of the second discharge is not large. This means that the discharge and the second discharge are performed at positions having similar SOC value levels. For example, it means that the first discharge and the second discharge must be performed in each of Measurement I, Measurement II, and Measurement III.

Here, although the recovery pattern of 'discharge' is shown in FIG. 6, the recovery pattern of voltage is the same or similar when performing the second charging again without much time elapse after performing the first charging, that is, even in 'charging' .

On the other hand, according to Equation 1, it can be seen that the total energy storage amount can be calculated by knowing the difference (SOC ₁ -SOC _{2 ) between the SOC 1} value at the first specific time and the SOC _{2 value at the second specific time.} have.

According to a general method, as shown in FIG. 6 , after performing the first discharge, the voltage is measured at the voltage stabilizer _{to calculate the SOC 1} value, and after performing the second discharge, the voltage is measured again at the voltage stabilizer to measure the voltage SOC ₂ The value is calculated and the total energy storage amount is calculated according to Equation 1 as the difference between the two values. When the second discharge is executed again without much time elapse after the first discharge, the pattern in which the voltage is recovered is the same or Because they are very similar, without calculating the SOC value from the voltage stabilizer, the voltage is measured at the same voltage recovery time immediately after the first discharge and the second discharge, and SOC ₁ ′ and SOC ₂ ′ are calculated through this, and the difference is expressed in Equation 1 above. Accordingly, the total energy storage amount can be calculated.

Hereinafter, a battery management method according to the present embodiment will be described with reference to FIG. 7 according to this principle.

First, a first charge/discharge is performed on the battery. Here, when 'charging/discharging' refers to charging or discharging the battery, if 'charging' is performed in the first charging/discharging execution step, the same 'charging' is performed in the second charging/discharging execution step, , when 'discharge' is performed in the first charging/discharging execution step, the same 'discharging' is performed in the second charging/discharging execution step. In this embodiment, the description will be focused on the execution of 'discharge'.

On the other hand, in the present embodiment, the meaning of 'executing charging/discharging' is not only when 'charging' or 'discharging' is artificially applied to the battery in order to check the state of the battery, but also naturally occurring during use of the battery. Also includes 'charge' or 'discharge'. For example, in the case of a battery used in an electric vehicle or a hybrid vehicle, the management status of the battery can be checked using 'charge' or 'discharge' that occurs naturally in the battery while the vehicle is running. Next, the first voltage according to the open circuit of the battery is measured after a first time period between immediately after the first charging and discharging and before reaching the voltage stabilization. Referring to FIG. 7 , the first voltage according to the open circuit of the battery is measured at a point in time when the voltage before reaching the voltage stabilizer is rapidly recovered after performing the first discharge. According to a general method, the first voltage is measured at the voltage stabilizer after the first discharge, but in this embodiment, the first voltage is measured immediately after the first charging/discharging and immediately before reaching the voltage stabilizer without delaying much time after the first discharge is executed.

Next, after the first charge/discharge, a second charge/discharge is performed on the battery. As described above, after performing the first discharge, a long time does not pass and the second discharge is performed again. That is, the second discharge is performed at the SOC value level at which the pattern in which the voltage recovers after the discharge is performed may appear the same or similar.

At this time, when checking the management status of the battery using 'charge' or 'discharge' that occurs naturally in the battery, the first discharge or second discharge that occurs naturally during the use of the battery without much time elapses This step can be carried out by selecting either discharging or secondary charging.

In the present embodiment, as shown in FIG. 7 , the second discharge is performed on the battery at a certain point in the original voltage stabilizer after the first discharge is performed to shorten the calculation time of the SOC value.

Next, the second voltage according to the open circuit of the battery is measured after a second time equal to the first time between immediately after the second charging and discharging and before reaching the voltage stabilizer. Referring to FIG. 7 , the second voltage according to the open circuit of the battery is measured after a second time equal to the first time has elapsed at a point in time when the voltage before reaching the voltage stabilizer is rapidly recovered after performing the second discharge. The voltage measured by the voltage stabilizer according to the first discharge and the second discharge by measuring the second voltage at the second time during the voltage recovery according to the second discharge in the same way as the first time during the voltage recovery according to the first discharge will have a difference in voltage in the same proportion as the difference in

As such, even if the voltage stabilization is not reached after the first discharge is performed, the SOC value and the total energy storage amount (Q _max ) calculation time can be greatly reduced by performing the second discharge and measuring each voltage.

Next, in the preset OCV-SOC characteristic curve of the battery, the first SOC (State Of Charge) value for the first voltage (SOC ₁ ) and the second SOC (State Of Charge) value for the second voltage (SOC) ₂ ) is calculated. Using the OCV-SOC characteristic curve or table, the first SOC (State Of Charge) _{value corresponding to the first voltage value (SOC 1} ) and the second SOC (State Of Charge) value for the second voltage corresponding to the second voltage value Charge) value (SOC ₂ ) is calculated.

Then, the total energy storage amount Qmax of the battery is calculated using the first SOC value SOC ₁ and the second SOC value SOC _{2 .} The total energy storage amount Qmax of the battery can be calculated through Equation 1 described above. First, the amount of energy change ΔQ of the battery according to the second discharge is calculated according to the current integration method.

As described above, even if the first voltage and the second voltage are not measured in the voltage stabilizer according to the first discharge and the second discharge, according to Equation 1, the total energy storage amount Qmax is Since it can be determined by the difference (SOC ₁ -SOC ₂ ) between the SOC _{1 value of , and the SOC 2} value at the second specific time point, it is possible to more accurately calculate the _{total energy storage amount (Q max ).}

Accordingly, the total energy storage amount Q _max of the battery calculated as described above is a value that reflects the degree of deterioration of the battery, and the charging or replacement time of the battery may be determined using this value.

In this case, the above battery management method may be applied not only to vehicles such as electric vehicles and hybrid vehicles, but also to various electronic devices using batteries.

Meanwhile, FIG. 8 is a diagram for explaining a battery management method according to another embodiment of the present invention. In the present embodiment, unlike the above-described embodiment, the calculation time of _{the total energy storage amount (Q max} ) of the battery may be further reduced by performing the second charging/discharging period faster than the second charging/discharging period.

In detail, in the above embodiment, as shown in Fig. 7, the second discharge was performed on the battery at some point in the original voltage stabilizer after the first discharge was executed, but in this embodiment, as shown in Fig. 8, After the first time, which is the voltage measurement time according to the first charging/discharging, before reaching the voltage stabilizer according to the first charging/discharging, that is, at the point in time when the voltage is rapidly recovered, the calculation time of the SOC value is calculated by executing the second charging/discharging on the battery. greatly shortened. Referring to FIG. 8 , it can be seen that the first voltage is measured after a first time elapses after the first discharge is performed, and the second discharge is immediately performed. Also in this embodiment, the second voltage according to the open circuit of the battery is measured after a second time equal to the first time between immediately after the second discharge and before reaching the voltage stabilization.

Accordingly, according to the present embodiment, by calculating the SOC1 value and the SOC2 value for the first voltage and the second voltage, respectively, it is possible to significantly shorten the measurement time of the total energy storage amount of the battery.

In this way, the container system 100 for high-speed measurement of reusable battery transportation and aging according to the present invention is measured through repeated charging and discharging of the reusable battery 1 being transported inside the transportation container 10 after the primary use is completed. The aging state is determined by calculating the total energy storage by voltage. Therefore, the total time required by using the time for transporting the reusable battery as the time for inspecting and screening the reusable battery can be minimized, and thus economic efficiency can be remarkably improved. That is, the total time required for the process of sorting and transporting the reusable reusable battery 1 can be significantly shortened, so that economic efficiency can be remarkably improved.

In addition, when the distribution control unit 40 sequentially controls individual charging and discharging of power to the plurality of reused batteries 1 loaded inside the transport container 10 , the aging measurement and calculation unit 50 controls the power supply unit 30 ) by sequentially and individually measuring the voltage of each reused battery 1 according to the charging and discharging execution to calculate the total energy storage. can be

In particular, the discharge electricity generated in the process of determining the aging state of each of the reused batteries 1 and calculating the total amount of storable energy is stored in the buffer battery 32 as a power source for maintaining the temperature inside the transport container 10 Therefore, an additional power source for battery temperature management is not substantially required, and energy efficiency can be significantly improved.

In addition, the temperature control device 60 that is connected to the buffer battery 32 to receive discharge electricity and driven independently from the aging measurement and calculation unit 50 is provided so that the temperature inside the transport container 10 is adjusted. Since it is selectively cooled so as to be maintained at a temperature within a preset range, storage safety during transportation of each of the reused batteries 1 can be improved.

In this case, terms such as "include", "comprise" or "comprise" described above mean that the corresponding component may be inherent unless otherwise stated, so other components are excluded. Rather, it should be construed as being able to include other components further. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

As described above, the present invention is not limited to each of the above-described embodiments, and modifications can be implemented by those of ordinary skill in the art to which the present invention pertains without departing from the scope of the claims of the present invention. and such modifications are within the scope of the present invention.

100: Container system for high-speed measurement of reusable batteries and aging
10: transport container 20: socket part
30: power supply unit 40: distribution control unit
50: aging measurement operation unit 60: temperature control device
60a: temperature control unit 60b: cooling device
61: temperature measuring unit 62: DC-AC inverter
70: display unit 71: internal camera
72: fire extinguishing system

Claims (5)

a transport container in which a plurality of reusable batteries are selectively stored;
a plurality of socket units disposed inside the transport container and provided so that each of the reusable batteries is individually power-connected and communicatively connected;
a power supply connected to each of the sockets and provided to charge and discharge power for aging measurement to each of the reused batteries;
a distribution control unit circuit connected to the power supply unit and controlling the charging and discharging of power to each of the reuse batteries connected to each of the socket units; and
A container system for high-speed measurement of reusable batteries and aging including an aging measurement operation unit that measures a voltage through repeated charging and discharging of each of the reused batteries connected to the socket unit, and calculates a total energy storage amount based on the measured voltage . The method of claim 1,
The distribution control unit controls to sequentially charge and discharge power to each of the reused batteries independently of each other,
The aging measurement operation unit sequentially and individually measures the voltage of each reused battery according to the charging and discharging of the power supply unit,
Reuse battery transportation, characterized in that the battery charge state is calculated from the preset open circuit voltage-battery charge state characteristic curve of each reused battery according to the measured voltage, and the total energy storage amount of each reused battery is sequentially and individually calculated and a container system for high-speed aging measurement. The method of claim 1,
The power supply unit includes a buffer battery that is connected to the power supply to each of the socket units and stores discharge electricity generated when measuring the aging of each of the reused batteries,
Further comprising a temperature control device connected to the buffer battery to receive the discharge electricity, driven independently of the aging measurement and calculating unit, and selectively cooled so that the temperature inside the transport container is maintained at a temperature within a preset range Container system for high-speed measurement of reusable batteries and aging characterized. 4. The method of claim 3,
The temperature control device is circuit-connected to each of the sockets, and a temperature measuring unit that receives a temperature signal from the BMS unit provided in the reusable battery to measure the temperature of the reusable battery;
Reuse battery transportation and aging container system, characterized in that it comprises a temperature control unit for selectively cooling control so that the temperature inside the transport container measured by the temperature measurement unit is maintained at a temperature within a preset range. 5. The method of claim 4,
The input terminal is connected to the output terminal of the buffer battery further comprising a DC-AC inverter for converting the DC power supplied from the buffer battery into AC power, wherein the DC-AC inverter is provided between the buffer battery and the temperature control device becomes,
The temperature control device is a container system for high-speed measurement of reusable battery transport and aging, characterized in that it includes an electrically driven cooling device provided inside the transport container.

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