KR102504019B1 - Secondary battery history management system for electric vehicle capable of detecting abnormal state of secondary battery and managing history of secondary battery to calculate life expectancy - Google Patents

Abstract

According to the present invention, a battery abnormal state detection device for an electric vehicle comprises: a plurality of short-circuit detection sensors for sensing whether a plurality of sequentially arranged conductive outer shells surrounding an electric vehicle battery are short-circuited; and an abnormal state determination unit for determining a degree of an abnormal state of the battery according to outputs of the plurality of short-circuit detection sensors.

Description

Secondary battery history management system for electric vehicles capable of detecting the abnormal state of secondary batteries and managing the history of secondary batteries to calculate life expectancy MANAGING HISTORY OF SECONDARY BATTERY TO CALCULATE LIFE EXPECTANCY}

The present invention relates to a device for accurately detecting an abnormal state due to expansion of a battery of an electric vehicle regardless of internal and external environments by detecting a short circuit using a battery case.

A lithium-based battery such as a lithium ion battery is mainly used as a power source of an electric vehicle. However, in a lithium-based battery, gas is generated due to a reaction of chemicals inside the battery in an over-charged, over-discharged state, or at an external temperature above an appropriate value. Swelling, in which the battery swells due to the resulting internal pressure, is observed. In this state, if overcharging and overdischarging continue, problems such as shortened battery life, reduced capacity, and reduced fuel efficiency of electric vehicles, as well as explosion or It can lead to failure, and safety accidents and safety concerns related to this follow one after another.

FIG. 1 is a diagram schematically illustrating such a battery fullness phenomenon, and shows how the battery surface expands in a dotted line shape due to gas inside the battery 10 .

In order to solve such a battery fullness phenomenon, conventionally, a system for monitoring an abnormal state of the battery by installing a stress sensor such as a strain gauge on the surface of the battery has been proposed. However, when a surface sensor such as a strain gauge is used, a problem arises in that the sensor must cover the entire surface of the battery.

In addition, conventional sensor systems have a problem in that it is difficult to know the exact stress state experienced by the battery because the output of these sensors changes depending on the battery or external temperature.

In addition, electric vehicle batteries have a high demand for charging by replacing the battery in addition to electrical charging and discharging, so in the case of conventional battery surface-attached sensors, there is a high risk of damage during frequent mounting and rubbing, and the conventional method of attaching the sensor to the battery surface has a problem that the lifetime of the sensor becomes the same as that of the battery.

Therefore, there is an urgent need to develop a battery abnormality detection device capable of accurately detecting an abnormal state of the battery regardless of the internal/external environment or usage environment of the battery.

An object to be solved by the present invention is to provide a device for accurately detecting an abnormal state due to expansion of a battery of an electric vehicle regardless of internal and external environments by detecting a short circuit using a battery case.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

An apparatus for detecting an abnormal state of an electric vehicle battery of the present invention for solving the above problems includes a plurality of short-circuit detection sensors for detecting whether a plurality of sequentially arranged conductive shells surrounding an electric vehicle battery are short-circuited; and an abnormality determining unit configured to determine a degree of an abnormality of the battery according to outputs of the plurality of short-circuit detection sensors.

The short circuit detection sensor may include a current detection means.

The determination unit may sequentially determine an abnormal state in consideration of an arrangement order of the plurality of short-circuited conductive shells.

The detection device may further include an abnormal state transmission unit for transmitting the abnormal state determined by the determination unit.

According to the present invention, it is possible to determine whether or not the battery is in an abnormal state without using a sensor attached to the surface of the battery. That is, the present invention has the advantage that it can be applied regardless of the battery by using a case that can be detachable from the outside of the battery for short circuit detection.

This advantage provides an additional advantage of not requiring attachment or replacement of a sensor when charging by replacing a battery.

In addition, the present invention has an advantage that the presence or absence of a battery abnormality can be accurately measured regardless of the sensitivity of the sensor by using the short circuit detection sensor for the degree of stress.

In addition, the present invention has an advantage that the degree of deformation of the battery can be measured with a sensor having a simple structure by detecting the staged deformation of the battery.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a diagram schematically showing a battery fullness phenomenon occurring in a lithium-based secondary battery.
2 is a diagram schematically showing an example of a battery housing mountable in an electric vehicle according to the present invention.
FIG. 3 is a diagram showing a battery and a battery case mounted in the battery housing 1000 of FIG. 2 according to an embodiment of the present invention.
4 is a perspective view showing an example of a shell structure of a battery case according to an embodiment of the present invention.
5 is a planar view showing the structure of a battery case according to an embodiment of the present invention.
6 and 7 are views each exemplarily showing the shape of a spacer according to an embodiment of the present invention.
8 is a schematic diagram for explaining a principle of measuring deformation of a battery according to an embodiment of the present invention.
9 is a schematic diagram for explaining a principle for measuring deformation of a battery according to another embodiment of the present invention.
10 is a diagram schematically illustrating an apparatus for detecting an abnormal state of a battery according to an embodiment of the present invention.
11 is a table listing abnormal state information that can be provided according to the output value of the short-circuit detection sensor according to the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only these embodiments are intended to complete the disclosure of the present invention, and are common in the art to which the present invention belongs. It is provided to fully inform the person skilled in the art of the scope of the invention, and the invention is only defined by the scope of the claims.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprises" and/or "comprising" does not exclude the presence or addition of one or more other elements other than the recited elements. Like reference numerals throughout the specification refer to like elements, and “and/or” includes each and every combination of one or more of the recited elements. Although "first", "second", etc. are used to describe various components, these components are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first element mentioned below may also be the second element within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings commonly understood by those skilled in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

Referring to FIG. 2 , the inside of the battery housing 1000 is partitioned into a plurality of battery cells 1100 . As will be described later, each battery cell 1100 is equipped with a battery case according to the present invention.

As shown, in the battery housing 1000 of the present invention, a plurality of cells 1100 are opened to one side of the housing 1000. This structure is intended to facilitate insertion of the battery assuming that it is mounted under the seat of a vehicle. Of course, otherwise, the other side of the battery housing 1000 partitioned and opened may be used.

Referring to FIG. 3 , in the present invention, a conventional lithium-based secondary battery including a lithium ion battery and a lithium polymer battery may be used as the battery 10 . As shown, the battery 10 is inserted and mounted into the battery seating space (A) of the battery case 100 of the present invention.

It is preferable that the (+) and (-) terminals 12 and 14 of the battery are exposed to the outside of the case 100 to facilitate operation during charging/discharging or mounting and dismounting. In addition, the surface material of the battery may be made of a conductive metal material such as aluminum or steel. In addition, the conductive metal material on the surface of the battery may be grounded through an appropriate means, and since anyone skilled in the art to which the present invention belongs can know, a detailed description thereof will be omitted.

The battery case 100 is composed of a plurality of conductive envelopes surrounding the battery 10, which will be described in more detail with reference to FIGS. 4 and 5 below.

Referring to the drawings, the battery case 100 is composed of three shells 110, 120, and 130. Each outer shell has a hexahedral shape with one side opened for mounting a battery. An opening is prepared for insertion of a battery. However, it will be appreciated by anyone that the outer shell shape of the present invention is exemplary and may have an arbitrary shape according to the shape of the battery. In addition, in the present invention, the shell of the battery case 100 may be used with both sides opened for battery insertion.

In the present invention, the material of the shells 110, 120, and 130 is not particularly limited as long as it has conductivity, but it is preferable to be designed to have rigidity enough not to be damaged during installation and detachment of the battery. For example, a conductive metal material or conductive metal alloy such as aluminum or iron having an appropriate thickness may be used.

In the present invention, each shell of the battery case 100 is sequentially increasing in size from the battery seating space (A). In addition, each outer shell is arranged at regular intervals.

In the above example, the case in which the conductive outer shell is composed of three sheets has been described, but the present invention is not limited thereto, and a battery case composed of two or four conductive outer shells may also be used.

Referring to FIG. 5 , an exemplary series of sheaths 110 , 120 , 130 are spaced at appropriate intervals δ1 , δ2 by spacers 140 , 150 , 160 . As shown, in the present invention, the inner spacer 140 tightly supports the battery 10 . Of course, in the present invention, the conductive shell 110 may be designed to directly contact the battery without using the inner spacer 140 . However, when the inner spacer is used, a short-circuit detection sensor can be added between the conductive surface of the battery 10 and the conductive shell 110 .

A series of spacers 150 and 160 closely support the inner conductive shells 110 and 120, respectively. In the present invention, the outermost conductive shell 130 is in contact with the battery housing, and although not separately shown, an additional spacer may be used on the outer circumference to avoid direct contact.

In the present invention, the spacers 140, 150 and 160 are made of an insulating material. For example, any material having insulating properties such as plastic and rubber may be used. Also, in the present invention, the spacers 140 , 150 , and 160 may be designed to have rigidity and a support structure capable of effectively suppressing deformation of the shell due to battery load when the battery 10 is mounted. For example, it may be preferable that the outer spacer has a wider contact area with the conductive shell than the inner spacer in order to structurally stably support the battery.

As shown, the spacers 140, 150, and 160 support the edges of the conductive shells 110, 120, and 130, and most of the sides of the conductive shells 110, 120, and 130 are not supported. is maintained as This is to allow the adjacent conductive shells 110, 120, and 130 to contact each other by deformation of each side of the conductive shell when the battery is full. In the present invention, it is preferable that the contact area of the spacers 140, 150, and 160 with the conductive shell is reduced as much as possible as long as the battery can be supported in the seating space.

In the present invention, the distances δ1 and δ2 between the conductive outer shells 110, 120, and 130 determined by the thickness of the spacer may be properly designed, and for example, the following method may be used.

In the present invention, the degree of fullness of the battery is determined from the electrical short-circuit state caused by the contact between the conductive shells 110, 120, and 130. That is, the battery state abnormality detection device of the present invention issues different state information such as 'Caution', 'Warning', and 'Urgent' according to an appropriate level of danger in consideration of the degree of swelling of the battery.

To this end, it is necessary to quantify the degree of deformation (the degree of fullness) up to the explosion pressure of the battery in advance and divide the risk level into appropriate stages. This can be obtained from data on the correlation of battery pressure and battery strain. From this correlation data, it is possible to calculate the amount of deformation corresponding to the boundary of each pressure section, and the amount of deformation can be used as a basis for setting the distance between the conductive outer shells 110, 120 and 130 described above.

For example, when the pressure of the battery is less than 1 kgf/cm 2 , it can be identified as the initial stage of battery deformation. In addition, a battery pressure in the range of 1 to 5 kgf/cm2 may be set as a step requiring battery management and battery replacement, and a battery pressure in the range of 1 to 5 kgf/cm2 may be set as a step in which battery replacement is essential. Separation intervals (eg, δ1 and δ2) may be set based on the amount of deformation corresponding to each of the boundary values of the pressure intervals.

Referring to FIG. 6 , the spacer 150 surrounds a portion of the internal conductive shell 110 and is designed as a 'L'-shaped pillar extending along the corner of the conductive shell. Accordingly, most of the side surfaces of the conductive outer shell may be designed to be open and contactable with an adjacent conductive outer shell.

Referring to FIG. 7 , the spacers 150 each have a 'ㅁ' shape extending along the top edge or bottom edge of the conductive shell 110 . Also in this case, side surfaces of the conductive sheath are opened so that adjacent spacers can be contacted.

6 and 7 illustrate the present invention by way of example, and otherwise, any structure capable of firmly supporting a battery in a battery cell may be employed. For example, although the spacer 150 in FIGS. 6 and 7 is composed of several physically separated members, each member constituting the spacer may be connected and integrally formed.

The battery case 100 of the present invention described above is useful in many aspects. The battery case composed of a series of conductive shells can provide information on abnormal conditions according to the degree of fullness of the battery, and has the advantage of being able to replace only the battery while leaving the battery case as it is because it is detachable from the battery.

The battery case 100 of the present invention composed of the above-described conductive outer shell and the spacer supports the battery and enables detection of a gradual amount of deformation according to the degree of deformation of the battery.

Below, this will be described in detail.

8 is a schematic diagram for explaining a principle of measuring deformation of a battery according to an embodiment of the present invention.

As described above, the conductive sheaths 110, 120, and 130 are spaced at appropriate intervals. Detection sensors S1 and S2 are connected to each conductive shell. In the present invention, as the short-circuit detection sensors S1 and S2, a conventional current monitoring means for monitoring the energization state or any short-circuit detection means such as a means capable of displaying a short-circuit state such as an LED may be employed.

When the battery is not deformed, the conductive shells 110, 120, and 130 maintain their initial spacing, but when the battery surface expands due to the internal pressure of the battery, the adjacent first shell 110 moves toward the second shell 120 ( See the dotted line), and ultimately is electrically shorted with the second shell 120.

At this time, the short-circuit detection sensor S1 detects the current applied from the power source, and when the battery is further deformed, the first shell 110, the second shell 120, and the third shell 140 electrically contact each other. And the short-circuit current is also detected in the short-circuit detection sensor S2.

Therefore, according to the present invention, the degree of deformation of the battery can be grasped clearly at a glance by the sequential operation of the short-circuit detection sensors S1 and S2.

9 is a schematic diagram for explaining a principle of measuring strain of a battery according to another embodiment of the present invention.

In this embodiment, three short-circuit detection sensors S1, S2, and S3 are used. The short-circuit detection sensors S1 , S2 , and S3 monitor electrical short-circuit states between the ground G and the first shell 110 , the second shell 120 , and the third shell 130 , respectively. A conductive surface of a battery may be used as the ground, for example. In this case, each of the spacers 140, 150, and 160 described with reference to FIG. 4 may be used to separate the surface of the battery from each conductive shell. In some cases, unlike the illustrated drawings, the voltage polarity between the battery surface G and the outer shells 110, 120, and 130 may be reversed, and such design matters fall within the normal creative scope of those skilled in the art.

10 is a diagram schematically illustrating an apparatus for detecting a state abnormality of a battery according to an embodiment of the present invention.

Referring to the drawing, short circuit detection sensors S1, S2, and S3 are connected to the battery case 100. As described above, the short-circuit detection sensors S1, S2, and S3 are electrically connected to each conductive sheath to detect whether each conductive sheath is short-circuited.

Outputs of the short circuit detection sensors S1 , S2 , and S3 are transmitted to the abnormal state determining unit 200 . The abnormal state determining unit determines the degree of the abnormal state from the outputs of the short circuit detection sensors S1, S2, and S3.

Hereinafter, the abnormal state determining operation of the abnormal state determining unit 200 according to the present invention will be described in detail.

First, the abnormal state determination unit 200 determines whether a short detection signal is transmitted from the first short detection sensor S1. When a short circuit is detected from the first short circuit detection sensor S1, the determination unit 200 may determine that an initial satiety phenomenon of the battery has occurred and determine the degree of the abnormal state as, for example, a "caution" state.

Similarly, when a short circuit signal is detected from the second short circuit detection sensor S2, the determining unit 200 determines that the battery is in a more dangerous state (eg, "warning") by determining that the fullness of the battery has progressed further. can do.

In addition, when a short circuit is detected by the third short circuit detection sensor S3, the determination unit 200 may determine that the battery is in an “emergency” state, i.e., on the verge of explosion, due to the internal gas pressure of the battery.

In this way, the battery abnormal state detection device of the present invention can detect the short circuit of the conductive sheets arranged step by step according to the degree of battery fullness to determine the abnormal state of the battery.

As described with reference to FIGS. 8 and 9 , the short-circuit detection sensors S1 , S2 , and S3 of the present invention monitor the current based on the inner conductive sheath 110 or the common ground G. Accordingly, when a short signal is detected from the short sensor (eg, S2 or S3) located on the outer side, the inner short sensor (eg, S1 or S2) detects a natural short signal. If not, it is necessary to check the abnormality of the short circuit detection sensor, and in this case, it is possible to additionally determine that “check” of the short circuit detection sensor is required in addition to the corresponding alarm. 11 is a table listing information that the determination unit 200 can provide according to the output value of the short-circuit detection sensor in the present invention.

Meanwhile, the device for detecting an abnormal state of the battery of the present invention may further include a transmitter 300 for transmitting the abnormal state information of the determination unit 200 to the outside. In the present invention, the transmitter 300 may communicate battery state information using any communication method such as wired or wireless.

Through this, the battery abnormal state detection device of the present invention can share abnormal state information of the battery with a battery management system (BMS) inside the vehicle, an external electric vehicle charge/discharge monitoring system, and the like.

In addition, although the battery abnormal state detection device of the present invention described above has been described as having a separate configuration, it is obvious that it is not limited thereto and can be implemented as part of a battery management system.

The history of the secondary battery of the present invention can be managed by a secondary battery history management system (not shown) for electric vehicles described below. A secondary battery history management system for an electric vehicle includes a secondary battery, a reader device, an information collection server, and a history management server.

First, a secondary battery is an electric vehicle battery that includes an RFID tag storing tag data for each battery and an RF antenna attached to a predetermined location to transmit and receive RF signals. This tag data is unique ID information of each secondary battery. (Secondary battery life expectancy) and 'initial secondary battery information' such as manufacturer, production date, vehicle information (vehicle model) of the first installed vehicle (first vehicle), driver information, and first installed date and place.

At this time, the RFID tag may receive and store updated or added secondary battery information from the reader device. In addition, a predetermined number of RF antennas are installed inside the secondary battery, and after a specific antenna operates for 2 to 4 seconds, the next antenna can switch and operate. This is to prevent failure due to heat generation caused by the operation of one antenna.

In addition, the reader device receives tag data from the secondary battery and displays unique ID information and secondary battery information accordingly. After updating or adding battery information, it performs a function of transmitting the unique ID information and secondary battery information (initial secondary battery information and updated secondary battery information) to the information collection server, tag data recognition unit, user It includes a request information receiving unit, a display unit, a secondary battery information management unit and a communication unit.

Specifically, the tag data recognizing unit performs a function of wirelessly receiving tag data of a secondary battery through an RF antenna and transmitting updated secondary battery information to an RFID tag through a secondary battery information management unit.

The user request information reception unit performs a function of receiving various user request information for inputting and confirming secondary battery information.

The display unit performs a function of displaying all information processed in conjunction with the secondary battery and the information collection server. In this embodiment, the user request information receiving unit and the display unit are set to a keypad and a liquid crystal display, respectively, but the present invention is not limited thereto, and when the display unit is set to a touch pad, the user request information receiving unit can be omitted.

The secondary battery information management unit performs a function of updating and storing secondary battery information included in the tag data (ie, storing initial secondary battery information and updated secondary battery information), as shown in FIG. It includes a battery information update module and a secondary battery information database module.

The secondary battery information updating module updates secondary battery information based on the user request information received through the user request information receiving unit when the secondary battery is moved after receiving tag data from the tag data recognizing unit.

The secondary battery information database module stores secondary battery information updated from the secondary battery information update module. At this time, the updated secondary battery information includes vehicle information (vehicle model) of the moved vehicle (second vehicle), driver information, date and place where the secondary battery was moved and installed, mileage of the previous vehicle (first vehicle), including the repair history of (the same applies to the 2nd to 3rd cars).

The communication unit performs a function of transmitting tag data including secondary battery information updated through the secondary battery information management unit to the information collection server in real time.

Meanwhile, the reader device according to the present invention can be variously set to a mobile phone, a portable reader, a fixed device, and the like.

Also, the information collection server receives and stores tag data including updated or added secondary battery information from the communication unit.

In addition, the history management server generates and manages various information such as the replacement time (life) of the secondary battery by searching and checking the history of each secondary battery using tag data including secondary battery information stored in the information collection server. do. Accordingly, the user can check the replacement time of the secondary battery through the history management server.

The tag data recognizing unit of the reader device wirelessly receives tag data from the RFID tag through the RF antenna of the secondary battery (a step in which the tag data recognizing unit of the reader device wirelessly receives tag data from the RFID tag through the RF antenna of the secondary battery). ), when the movement of the secondary battery occurs, the user request information receiving unit receives user request information for updating the secondary battery information (when the movement of the secondary battery occurs, the user request information receiving unit updates the secondary battery information) step of receiving information). Then, based on the received user request information, the secondary battery information management unit updates and stores the secondary battery information included in the tag data (the secondary battery information management unit processes the user request information received from the user request information reception unit and stores it). Renewing and storing the secondary battery information included in the tag data). Next, the tag data recognition unit transmits the updated secondary battery information to the RFID tag of the secondary battery (transmitting the tag data recognition unit updated secondary battery information to the RFID tag), and the RFID tag receives the updated secondary battery information. and store (receiving and storing the secondary battery information for which the RFID tag has been updated). In addition, the communication unit of the reader device transmits the tag data including the updated secondary battery information to the information collection server in real time (the communication unit of the reader device transmits the tag data including the updated secondary battery information to the information collection server). ). Thereafter, the history management server searches and confirms the history of each secondary battery by using the tag data including the unique ID information of the secondary battery stored in the information collection server, the initial secondary battery information, and the updated secondary battery information. Battery replacement timing is created (a step of generating timing using tag data including unique ID information stored in the information collection server, initial secondary battery information, and updated secondary battery information in the history management server).

In this case, the information collection server may process the expected life of the secondary battery, initial secondary battery information, and updated secondary battery information to generate an exchange time. For example, the information collection server groups initial secondary battery information and updated secondary battery information for each previous vehicle, and uses at least one of the initial secondary battery information and updated secondary battery information in each of a plurality of groups to obtain driver information and installation period. After generating the mileage and repair history, the secondary battery shortened lifespan is generated in each of a plurality of groups, and then the replacement time can be generated by arithmetically subtracting the sum of the secondary battery shortened lives of the plurality of groups from the expected lifespan.

In this case, in order to calculate the shortened lifespan in each of the plurality of groups, the information collection server pre-processed shortened lifespan in inverse proportion to the installation period in each of the plurality of groups (the pre-processed shortened lifespan for each installation period is preset according to the type of secondary battery stored in the database), then

The first exponent value (a natural number equal to or greater than 1 that is directly proportional to the value obtained by dividing the mileage by the installation period; taking into account the fact that the longer the mileage, the shorter the lifespan even with the same installation period)

2nd exponent value (a value between 0 and a natural number 1 that is inversely proportional to the driver's age calculated from driver information; even if the driver has the same installation period, if the driver's age is young, the life of the secondary battery is quickly shortened due to inexperienced driving or excessive driving considering) and

The 3rd index value (a natural number greater than 1 that is directly proportional to the value obtained by adding a natural number 1 to the number of repairs calculated from the repair history; taking into account the fact that the life of a secondary battery is shortened faster as the number of repairs increases even during the same installation period) and

The first weight value (value obtained by dividing the value obtained by adding natural number 1 to the number of repairs by the driver's age is a value obtained by adding natural number 1 to the number of repairs when the value is less than the predetermined first specific value, and has a value of natural number 1 when it is greater than or equal to the predetermined first specific value) A value exceeding 1, a natural number that is directly proportional to the value divided by the driver's age; even if the number of repairs is the same, if the driver's age is young, considering that the repair is a fatal major part) by arithmetically multiplying the pretreatment shortened lifespan, The shortened lifespan can be calculated.

Second weight value (when the value of the ratio corresponding to winter in the installation period is less than the predetermined second specific value, it has a value of 1, and when it is greater than the predetermined second specific value, it is directly proportional to the value of the ratio corresponding to winter in the installation period A value exceeding 1, a natural number for which; consider that the life of a secondary battery is quickly shortened in winter even during the same installation period)

In addition, since a body inclination sensor is built in each of the plurality of groups, the sensor information may be transmitted to the information collection server as input of user request information directly or by wireless communication means. The information collection server analyzes the sensor information, and when the number of times the tilt angle of the vehicle exceeds the preset third specific value exceeds the preset specific number, a natural number of 1 or more that is directly proportional to the number of times the tilt angle of the vehicle exceeds the preset third specific value The shortened lifespan can be calculated by arithmetically multiplying the fourth index value, which is a value, by the preprocessing shortened lifespan (considering that the lifespan of a secondary battery is quickly shortened when excessive cornering driving exceeds a threshold value).

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (1)

As a system for managing the history of secondary batteries for electric vehicles that store tag data,
Secondary battery abnormal state detection device;
Receives tag data from the secondary battery, displays unique ID information and secondary battery information accordingly, and updates the secondary battery information when the secondary battery is moved, and then transfers the unique ID information and secondary battery information to the information collection server A reader device that transmits to;
an information collection server that receives and stores tag data including updated secondary battery information from the reader device; and
A history management server for creating a replacement time of the secondary battery by searching and checking the history of each secondary battery using tag data including secondary battery information stored in the information collection server;
The secondary battery abnormal state detection device includes a short-circuit detection sensor for detecting whether or not a short circuit exists in the conductive shell surrounding the secondary battery and an abnormal state determining unit for determining an abnormal state of the secondary battery according to an output of the short-circuit detection sensor,
The secondary battery includes an RFID tag storing tag data and an RF antenna attached to transmit and receive RF signals, and the RFID tag receives and stores updated secondary battery information from the reader device,
The reader device includes a tag data recognizing unit that wirelessly receives tag data; a user request information receiving unit that receives various user request information for inputting and confirming secondary battery information; a display unit displaying all information processed in conjunction with the secondary battery and the information collection server; a secondary battery information management unit that updates and stores battery information included in tag data; a communication unit that transmits tag data including secondary battery information updated through the secondary battery information management unit to an information collection server in real time; including,
The tag data recognition unit transmits the secondary battery information updated through the secondary battery information management unit to the RFID tag;
The history management system of the secondary battery for the electric vehicle,
wirelessly receiving tag data from the RFID tag through the RF antenna of the secondary battery by the tag data recognizing unit of the reader device;
receiving user request information for updating secondary battery information by a user request information reception unit of the reader device when the secondary battery is moved;
processing the user request information received from the user request information receiver of the reader device by the secondary battery information management unit of the reader device to update and store secondary battery information included in the tag data;
transmitting the updated secondary battery information to the RFID tag by the tag data recognition unit of the reader device;
Receiving and storing secondary battery information for which the RFID tag has been updated;
transmitting tag data including updated secondary battery information to the information collection server by the communication unit of the reader device;
managing the history of the secondary battery by using tag data including unique ID information stored in the information collection server, initial secondary battery information, and updated secondary battery information in the history management server; do,
The unique ID information includes the life expectancy of the secondary battery,
The initial secondary battery information includes the manufacturer, production date, vehicle information and driver information of the first installed vehicle, and the first installed date and place,
The updated secondary battery information includes vehicle information and driver information of the vehicle to which the secondary battery was moved, the date and place where the secondary battery was moved and installed, the mileage of the previous vehicle, and the repair history in the previous vehicle,
The history management server groups the initial secondary battery information and updated secondary battery information for each previous vehicle, and uses the initial secondary battery information and updated secondary battery information in each of a plurality of groups to provide driver information, installation period, mileage, and repair After generating a history, generating a shortened secondary battery life in each of a plurality of groups, and then arithmetically subtracting the sum of the secondary battery shortened lives of the plurality of groups from the expected life of the secondary battery to generate an exchange time,
The history management server generates a preprocessing shortened lifespan in inverse proportion to the installation period in each of a plurality of groups in order to calculate a shortened lifespan in each of a plurality of groups, and then a first index value and a second index value in the preprocessing shortened lifespan. And arithmetically multiplying all of the third index value, the fourth index value, and the first weight value to calculate a shortened lifespan in each of a plurality of groups,
The first index value is a value equal to or greater than 1, which is a natural number that is directly proportional to the value obtained by dividing the mileage by the installation period,
The second index value is a value between 0 and a natural number 1, which is inversely proportional to the driver's age calculated from driver information,
The third index value is a value equal to or greater than 1, which is a natural number that is directly proportional to the value obtained by adding 1 natural number to the number of repairs calculated from the repair history;
The first weight value is a value obtained by dividing the number of repairs plus natural number 1 by the driver's age when the value is less than a preset first specific value, the value is a natural number 1, and when it is greater than or equal to the preset first specific value, the value obtained by adding a natural number 1 to the number of repairs is a value exceeding 1, a natural number that is directly proportional to the value divided by the driver's age,
A body tilt sensor is built into each car of a plurality of groups, and sensor information is transmitted to the information collection server as input of user request information,
The fourth index value is a natural number 1 or more that is directly proportional to the number of times the tilt angle of the vehicle is equal to or greater than the preset third specific value when the number of times the tilt angle of the vehicle is equal to or greater than the preset third specific value exceeds the preset specific number. A history management system for secondary batteries for electric vehicles.

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