KR20200002302A - battery management system - Google Patents

Abstract

The present invention relates to a battery replacement management system and, more particularly, to a battery replacement management system capable of managing a history of a battery used in an electric vehicle and managing a difference in value by evaluating the value of a new battery and the battery to be replaced through value evaluation. The battery replacement management system comprises a battery history management unit, a current value evaluation unit, a current region value evaluation unit, an actual battery value calculation unit, a unit for storing value of a battery before replacement, a unit for storing value of a battery after replacement, and a battery value management server.

Description

Battery replacement management system {battery management system}

The present invention relates to a battery replacement management system, and more particularly, to manage the history of a battery used in an electric vehicle and evaluate the value of a battery to be replaced with a battery that is used before replacement at the time of battery replacement through a valuation. The present invention relates to a battery replacement management system that can be managed.

Global warming is accelerating, causing meteorological disasters and threatening lives by severe climate change.

In response to this, there are voices of strong carbon dioxide regulations around the world, and in response to these environmental and social demands, the automotive industry is entering a new phase. There is a growing interest in green cars.

Such eco-friendly vehicles include hybrid electric vehicles (HEVs) that use both internal combustion engines and electric energy according to power sources, electric vehicles (EVs) using only electric energy, and fuel cell vehicles (FCEVs) using fuel cells; Fuel cell electric vehicles).

In Korea, the demand and supply of electric vehicles are expected to increase rapidly, in response to the global trend to reduce carbon dioxide emissions.

In addition, electric vehicles such as Plug-in-Hybrid Electric Vehicles (PHEVs) have advantages such as low energy consumption and low air pollution.

Such electric vehicles play an important role in solving environmental pollution and energy savings, especially in the paradigm of the smart grid. With the rapid use of electric vehicles, many of the effects of electric vehicle loads on the power grid can be found. Research has been ongoing.

Meanwhile, a conventional charging system of an electric vehicle, as shown in FIG. 1, includes a battery pack 10 in which a plurality of cells are connected according to a required amount of electric energy, and the battery pack 10 of the battery pack 10. Voltage measuring unit 11 for measuring the voltage, a battery management system 12 (BMS: Battery Management System) for uniformly maintaining the voltage difference between the cells in the battery pack 10, and converts the commercial power into a chargeable form It was made to include a charging circuit (13).

The charging system of the electric vehicle has been developed only to charge the battery, but the research for replacing the battery pack is insufficient.

Currently, large electric vehicle manufacturers are showing the technology to replace the battery pack itself in order to significantly reduce the long charging time for charging the battery, and the technology for replacing the battery pack is being demonstrated, but the battery pack through the valuation Since there is no technology for managing the difference in value between the livers, it was an obstacle to using replacement technology specifically.

For example, a user with a relatively good battery pack may be obsessed with replacing the poor battery pack when replacing the battery pack, and it often happens.

Conversely, there may be damage to the service providers who are in charge of replacing poor quality battery packs with good ones.

Therefore, it is necessary to develop a technology that can solve the problems between the two by providing the difference between the obsession and damage consciousness between the user and the operator through an objective valuation.

Accordingly, the battery replacement management system that manages the history of the battery used in the electric vehicle and evaluates the value of the battery to be replaced before the replacement of the battery when the battery is replaced through a valuation is proposed a battery replacement management system that can manage the difference will be.

Republic of Korea Patent Publication No. 10-2015-0064378 (2015.06.11)

Accordingly, the present invention has been made to solve the above conventional problems,

An object of the present invention is to provide a difference through an objective valuation of obsession and damage consciousness between the user and the operator to solve the problem between the two.

Another object of the present invention is to provide an objective value estimate (evaluation) of a battery pack in use, such as the remaining life (residual value) of the life expectancy (lifetime) It is to calculate the value of the battery level (remaining electricity).

Another object of the present invention is to implement a policy of expanding the installation of a fast charging type charging station for the expansion of the current electric vehicle, if the value of the battery to be replaced can be accurately calculated, the battery pack replacement method is more economical, Since expansion of the supply can be easily made, an alternative is provided.

In order to achieve the problem to be solved by the present invention, the battery replacement management system according to an embodiment of the present invention,

Battery history management unit 110 for managing the history of any one or more of the temperature of the battery, the voltage of the battery, the number of charge and discharge of the battery, the date of manufacture of the battery; and

Present value evaluation unit 120 for evaluating the present value using any one or more of the number of charge and discharge, the current charge amount; and

Local value evaluation unit 130 to calculate the electric value of the local area to reflect this; and

A battery real value calculation unit 140 for calculating a real value of a battery through at least one of the battery history management unit, the present value evaluation unit, and a local value evaluation unit;

A pre-battery value storage unit 150 for storing the real value of the pre-replacement battery calculated by the battery real value calculation unit; and

Replacement battery value storage unit 160 for storing the actual value of the battery being prepared for replacement; And

It is configured to include a battery value management server 100 comprising a; battery difference conversion unit 170 for converting the value difference between the real value of the battery before the replacement and the real value of the battery after the replacement to a converted value, The problem of this invention is solved.

Battery replacement management system according to the present invention,

The difference between the obsession and damage consciousness between the user and the operator through objective valuation is provided to provide an effect that can solve the problem between the two.

In addition, it provides the effect of calculating the value of the remaining life (residual value) and the remaining battery capacity (remaining electricity) of the battery's life expectancy (life time) such as manufacturing process and quality history, number of charges and usage history of the battery. .

That is, it provides an objective value estimation (evaluation) of the battery pack in use.

In addition, the current policy is to expand the installation of fast charging stations to expand the supply of electric vehicles.However, if the value of the battery to be replaced can be accurately estimated, the replacement of the battery pack will be more economical and easier to expand. This may provide an alternative.

1 is a configuration diagram schematically showing a system for charging a battery of a conventional electric vehicle.
2 is an overall configuration diagram of a battery replacement management system according to an embodiment of the present invention.
3 is a block diagram of a battery value management server of a battery replacement management system according to an exemplary embodiment of the present invention.
4 is an exemplary view illustrating a battery valuation data field stored in a battery value management server of a battery replacement management system according to an exemplary embodiment of the present invention.

Battery replacement management system according to an embodiment of the present invention,

Battery history management unit 110 for managing the history of any one or more of the temperature of the battery, the voltage of the battery, the number of charge and discharge of the battery, the date of manufacture of the battery; and

Present value evaluation unit 120 for evaluating the present value using any one or more of the number of charge and discharge, the current charge amount; and

Local value evaluation unit 130 to calculate the electric value of the local area to reflect this; and

A battery real value calculation unit 140 for calculating a real value of a battery through at least one of the battery history management unit, the present value evaluation unit, and a local value evaluation unit;

A pre-battery value storage unit 150 for storing the real value of the pre-replacement battery calculated by the battery real value calculation unit; and

Replacement battery value storage unit 160 for storing the actual value of the battery being prepared for replacement; And

And a battery value management server 100 configured to include; a battery difference conversion unit 170 for converting a real value of the battery before the replacement and a value difference between the real value of the battery after the replacement into a converted value. It features.

Hereinafter, an embodiment of the battery replacement management system according to the present invention will be described in detail.

In recent years, it has taken a long time to charge a car's battery, so the perception of electric vehicles has not been very positive for the general public.

Therefore, there is a need for a method of replacing the battery in order to save charging time and smooth operation.

Automotive batteries typically use lithium polymer batteries.

To change from rechargeable to replaceable, cylindrical batteries are bundled and replaced in tray-type packs.

As a result, systems for quickly replacing the battery pack with the battery pack have been developed. In the present invention, when the battery pack is replaced, the obsession and damage consciousness between the user and the operator are provided through an objective valuation to provide a difference. It has a purpose to solve liver problems.

2 is an overall configuration diagram of a battery replacement management system according to an embodiment of the present invention.

As shown in FIG. 2, the inventors of the battery replacement management system of the present invention manage a current history such as the number of charge / discharge cycles of a battery, the date of manufacture of a battery, and the like, when the battery is replaced with respect to a specific vehicle 10. Characterized in that comprises a battery value management server 100 that provides a function for evaluating the.

In particular, the battery value management server 100, which is a key component of the present invention, as shown in Figure 3, will have the following configuration.

That is, the battery value management server 100 is a battery history management unit 110, the present value evaluation unit 120, the local value evaluation unit 130, the battery real value calculation unit 140, the battery value storage before replacement 150, the replacement battery value storage unit 160, and the battery difference conversion unit 170 will be configured.

Specifically, the battery history management unit 110 performs a function of managing the history of any one or more of the temperature of the battery, the voltage of the battery, the number of charge and discharge of the battery, the date of manufacture of the battery.

In other words, it manages the history of the battery temperature, voltage, date of manufacture and the like, in particular by additionally managing the number of charge and discharge of the battery, it is to use as a basic data to evaluate the value of the battery.

In particular, the value of the battery is evaluated through the operation of the following components.

That is, the present value evaluation unit 120 is to evaluate the present value using any one or more of the number of charge and discharge, the current charge amount.

For example, the current value can be evaluated based on the number of charge / discharge cycles, which decreases the performance of the battery depending on the number of charge / discharge cycles.

Therefore, the number of charge and discharge cycles can be used as a reference point for evaluating the present value.

In addition, in the present invention, as an indicator indicating the current state of charge, it is found that it is related to the stability of a battery and an electric vehicle.

Looking at the current integration method as a method of estimating the current charge amount, the current integration method is expressed through the current charge initial value and the integrated value of the sensed current.

However, the current integration method has a disadvantage in that the accumulated current charge amount error occurs over time due to an error generated during hardware and current sensing.

In order to solve the drawback of the integration error over time, it is divided into the method of resetting the initial value of the current charge amount and the method of accurately sensing the current. The error generated during the current sensing is hard to improve because it occurs in the hardware.

Among various methods of resetting the initial value of the current charge amount, the method of resetting the current charge amount by using the open circuit voltage requires a long pause in the algorithm operation but has the highest accuracy. .

However, in order to derive the open circuit voltage, a long down time of at least 30 minutes is required even in a unit cell battery, so the method of resetting the current charge amount using the open circuit voltage is not applicable while driving an electric vehicle. .

However, in the present invention, after the battery is replaced, the open circuit voltage is measured using the idle period of the replaced battery after the replacement, and the history is stored in the battery value management server 100 so that the history of the battery can be managed later. .

(수식 1)Therefore, it is possible to calculate the current charge amount of the battery with an accurate value.

(Formula 1)

T ₀ in Equation 1 denotes a time point when resetting the previous SOC, t time point when resetting the current, i denotes a current amount, and C denotes an effective current.

It is also possible to assess the present value based on the state of charge of the battery, for example based on the state of battery capacity.

Referring to FIG. 4, when the battery identifier is ROK-2828-007, the number of charge / discharge cycles of the battery is converted into 92 points of battery capacity state information when the charge is 32 times.

However, when the battery identifier is ROK-2237-775, the battery charge / discharge frequency is converted into 96 points of the battery capacity status information when the battery is charged 17 times.

At this time, in the example of the present invention, the present value evaluation unit evaluated the present value based on the above charge / discharge frequency information.

The local area value evaluation unit 130 calculates and reflects the electric value of the local area.

For example, estimating the electric value of the region where the battery is replaced may result in a price including the electricity price of the battery charging the electricity.

This allows weighting of the current value of the battery to the regionally different electric value, which allows the objective introduction of the electric value of the charging to the region.

In addition, the battery real value calculation unit 140 is to calculate the real value of the battery through at least one of the information from the battery history management unit, the current value evaluation unit and the local value evaluation unit.

At this time, the battery real value calculation unit stores the calculated real value of the pre-replacement battery in the pre-replacement battery value storage unit 150.

For example, a real value of 272,000 won is stored in a battery.

At this time, the battery value storage unit 160 after replacing the actual value of the battery being prepared for replacement.

However, the actual value of 272,000 won before the replacement may be calculated after measuring the current charge amount through the open circuit voltage after replacement.

For example, the actual value of a battery that is being prepared for replacement is stored at 325,000 won.

The battery difference converting unit 170 converts the value difference between the real value of the battery before the replacement and the real value of the battery after the replacement to the converted value.

For example, subtracting 272,000 won from 325,000 won converts the value difference of 53,000 won, which is provided to the driver who replaces the battery.

Of course, there is a disadvantage that there is a time difference, but it may be reflected later by storing it in the battery value management server (100).

Through the present invention, by providing the difference through the objective valuation of obsession and damage consciousness between the user and the operator to provide an effect that can solve the problem between the two.

In addition, it provides the effect of calculating the value of the remaining life (residual value) and the remaining battery capacity (remaining electricity) of the battery's life expectancy (life time) such as manufacturing process and quality history, number of charges and usage history of the battery. .

That is, it provides an objective value estimation (evaluation) of the battery pack in use.

In addition, although the current policy is to expand the installation of quick charging stations to expand the supply of electric vehicles, it is more economical and easier to expand the battery pack if the value of the battery to be replaced can be accurately calculated. This may provide an alternative.

Those skilled in the art to which the present invention pertains as described above may understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not restrictive.

10: vehicle
100: battery value management server

Claims (1)

In the battery replacement management system,
Battery history management unit 110 for managing the history of any one or more of the temperature of the battery, the voltage of the battery, the number of charge and discharge of the battery, the date of manufacture of the battery; and
Present value evaluation unit 120 for evaluating the present value using any one or more of the number of charge and discharge, the current charge amount; and
Local value evaluation unit 130 to calculate the electric value of the local area to reflect this; and
A battery real value calculation unit 140 for calculating a real value of a battery through at least one of the battery history management unit, the present value evaluation unit, and a local value evaluation unit; and
A pre-battery value storage unit 150 for storing the real value of the pre-replacement battery calculated by the battery real value calculation unit; and
Replacement battery value storage unit 160 for storing the actual value of the battery being prepared for replacement; And
And a battery value management server 100 configured to include; a battery difference conversion unit 170 for converting a real value of the battery before the replacement and a value difference between the real value of the battery after the replacement into a converted value. Battery replacement management system.

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