KR20180008215A - Battery cell temperature control system and method - Google Patents

Abstract

The present invention relates to a system and a method for controlling the temperature of a battery cell, and specifically, to a system and a method for controlling the temperature of a battery cell which measure the temperature of a battery cell, maintain the temperature of a battery at a predetermined level based on the measured temperature value, and enable a user to directly command a temperature control of a battery cell through a user terminal based on the measured temperature value. In addition, the present invention relates to a system and a method for controlling the temperature of a battery cell which controls the temperature of a battery cell, such that a user sets a time to use a vehicle through the user terminal in advance, and uses the vehicle at the set time, thereby driving the battery cell at the optimum temperature. The system for controlling the temperature of a battery cell comprises: a temperature measurement unit for measuring a battery cell; a temperature control unit for controlling the temperature of the battery cell; and a communication unit which provides the measured temperature value, and receives feedback data from a user terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to a battery cell temperature control system and method,

The present invention relates to a system and method for controlling the temperature of a battery cell, and more particularly, to a system and method for controlling a temperature of a battery cell, including a function of measuring a temperature of a battery cell and maintaining a temperature of the battery at an appropriate level based on the measured temperature value, And more particularly, to a temperature control system and method of a battery cell in which a user can direct temperature control of a battery cell through a user terminal.

In addition, it is also possible to set a time for the user to use the vehicle through the user terminal and to control the temperature of the battery cell in advance so that the user can use the vehicle immediately at the set time, To a temperature control system and method for a battery cell.

Secondary batteries having high electrical properties such as high energy density and high ease of application according to the product group can be used not only as a portable device but also as an electric vehicle (EV), a hybrid vehicle (HV), a hybrid vehicle (ESS) and uninterruptible power supply (UPS) systems using medium to large batteries for industrial use.

Such a secondary battery is not only a primary advantage that the use of fossil fuel can be drastically reduced, but also produces no by-products resulting from the use of energy, and thus is attracting attention as a new energy source for enhancing environmental friendliness and energy efficiency.

The secondary battery may not necessarily be realized by a battery of a portable terminal or the like. However, as described above, a battery applied to an electric vehicle, an energy storage source, or the like generally has a plurality of unit secondary battery cells Thus increasing the suitability for high capacity environments.

Since the secondary battery cells used in the form of a plurality of the secondary batteries are repeatedly charged and discharged, their functions are degraded and their service life is gradually reduced. Therefore, it is essential to manage the secondary battery cells to prevent this. In particular, when the secondary battery cell is used when the temperature of the secondary battery cell is excessively high or low, the service life of the secondary battery cell can be drastically shortened.

Therefore, it is necessary to check and manage the temperature of the secondary battery cell before using the secondary battery cell. It is also necessary to maintain the temperature of the secondary battery cell so that the temperature of the secondary cell does not increase excessively or decrease.

Korean Patent Publication No. 10-2001-0072530

It is an object of the present invention to provide a temperature control system and method for a battery cell that measures the temperature of a battery cell and maintains the temperature of the battery cell at an appropriate level based on the measured temperature value, .

It is another object of the present invention to provide a temperature control method and apparatus and a method for controlling a temperature of a battery cell by directly instructing temperature control of a battery cell through a user terminal, The present invention also provides a temperature control system and method for a battery cell that can set a time for using the vehicle through a predetermined time and control the temperature of the battery cell in advance so that the user can immediately use the vehicle at a set time.

A temperature control system for a battery cell according to an embodiment of the present invention includes: a temperature measurement unit for measuring a temperature of a battery cell; A temperature controller for controlling a temperature of the battery cell based on the measured temperature value; And a communication unit that provides the measured temperature value to the user terminal and receives feedback data from the user terminal as a response to the temperature value, and when the feedback data is received, The temperature of the battery cell can be controlled corresponding to the feedback data.

Wherein the temperature controller diagnoses the state of the battery to a first temperature state when the measured temperature value is equal to or greater than a first reference value of the temperature of the battery cell, And a diagnostic unit for diagnosing a state of the subject.

Wherein the temperature control unit comprises: A first control circuit capable of decreasing a temperature of the battery cell when a diagnosis result of the diagnosis unit corresponds to the first temperature state; And a second control circuit capable of increasing the temperature of the battery cell when the diagnosis result of the diagnosis unit corresponds to the second temperature state.

Wherein the communication unit includes: a divergence unit for diverging a position detection signal of a certain distance radius; And a position detector for detecting whether the user terminal is located within a detection distance of the signal.

The communication unit may receive the pre-temperature control data from the user terminal, and the temperature control unit may control the temperature of the battery cell at a time corresponding to the time setting data included in the received pre-temperature control data.

When the feedback data is received, the feedback data may be set to the highest priority and the temperature control unit may be controlled based on the feedback data.

A method of controlling a temperature of a battery cell according to an embodiment of the present invention includes: a temperature measurement step of measuring a temperature of the battery cell; A temperature control step of controlling a temperature of the battery cell based on the measured temperature value; And a receiving step of providing the user terminal with the measured temperature value and receiving feedback data from the user terminal as a response to the temperature value, The temperature control unit may control the temperature of the battery cell corresponding to the feedback data.

The temperature control step diagnoses the state of the battery to a first temperature state when the measured temperature value is equal to or higher than a first reference value of the temperature of the battery cell and if the measured temperature value is equal to or lower than a second reference value, And diagnosing the first temperature state to a second temperature state.

Wherein the temperature control step includes: decreasing a temperature of the battery cell when the diagnosis result of the diagnosis unit corresponds to the first temperature state; And increasing the temperature of the battery cell when the diagnosis result of the diagnosis unit corresponds to the second temperature state.

The receiving step may include detecting whether the user terminal is located within a detection distance of a position detection signal of a certain distance radius.

The receiving step may further include receiving pre-temperature control data from the user terminal, wherein the temperature control step includes a step of controlling the temperature of the battery cell at a time corresponding to the time setting data included in the pre- And controlling the temperature of the gas.

The temperature control step may further include, when the feedback data is received, setting the feedback data to a highest priority and controlling the temperature control unit based on the feedback data.

According to an aspect of the present invention, there is provided a temperature control system for a battery cell that measures the temperature of a battery cell and maintains the temperature of the battery cell at an appropriate level based on the measured temperature value, And methods.

In addition, the user provides the measured temperature value to the user, and the user who is provided with the temperature value directs the temperature control of the battery cell through the user terminal, so that the user can manually control the temperature of the battery cell, The time for using the vehicle through the user terminal is set in advance and the temperature of the battery cell is controlled in advance so that the user can immediately use the vehicle at the set time, Accordingly, it is possible to provide a temperature control system and method of a battery cell that allows an automobile to collect information and efficiently manage the temperature of the battery.

1 is a schematic view of an electric vehicle to which a temperature control system for a battery cell according to an embodiment of the present invention can be applied.
2 and 3 are views schematically showing a temperature control system of a battery cell according to an embodiment of the present invention.
4 to 6 are flowcharts for explaining a method of controlling a temperature of a battery cell according to an embodiment of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Further, the term "part" in the description means a unit for processing one or more functions or operations, which may be implemented by hardware, software, or a combination of hardware and software.

1 is a schematic view of an electric vehicle to which a temperature control system for a battery cell according to an embodiment of the present invention can be applied.

Although the temperature control system for a battery cell according to an embodiment of the present invention is applied to the electric vehicle 1 in FIG. 1, the temperature control system for a battery cell according to an embodiment of the present invention is not limited to an electric vehicle, Or a secondary battery such as an industrial energy storage system (ESS) or an uninterruptible power supply (UPS) system can be applied to any technology field.

The electric vehicle 1 may include a battery 10, a BMS (Battery Management System) 20, an ECU (Electronic Control Unit) 30, an inverter 40 and a motor 50.

The battery 10 is an electric energy source that drives the electric vehicle 1 by providing a driving force to the motor 50. [ The battery 10 can be charged or discharged by the inverter 40 in accordance with the driving of the motor 50 and / or the internal combustion engine (not shown).

Here, the type of the battery 10 is not particularly limited and may be a lithium ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel hydride battery, a nickel zinc battery, or the like.

The battery 10 is formed of a battery pack in which a plurality of battery cells are connected in series and / or in parallel. At least one such battery pack may be provided to form the battery 10.

The BMS 20 estimates the state of the battery 10 and manages the battery 10 using the estimated state information. For example, estimates and manages state information of the battery 10 such as a state of charge (SOC) of the battery 10, a state of health (SOH), a maximum input / output power allowable amount, and an output voltage. By using this state information, it is possible to control the charging or discharging of the battery 10, and furthermore, to estimate the replacement time of the battery 10.

The BMS 20 may include a temperature control system (100 of FIG. 2) of the battery cell according to an embodiment of the present invention to be described later or may be operatively connected to the temperature control system of the battery cell. The BMS 20 can diagnose the state of the battery cell 10 through the temperature control system of the battery cell and adjust the temperature of the battery cell 10 to an appropriate level based on the diagnosis result.

The ECU 30 is an electronic control device for controlling the state of the electric vehicle 1. [ For example, it determines the degree of torque based on information such as an accelerator, a break, and a speed, and controls the output of the motor 50 to match the torque information.

The ECU 30 also sends a control signal to the inverter 40 so that the battery 10 can be charged or discharged by the BMS 20.

The inverter 40 causes the battery 10 to be charged or discharged based on the control signal of the ECU 30. [

The motor 50 drives the electric vehicle 1 based on control information (for example, torque information) transmitted from the ECU 30 using the electric energy of the battery 10.

Hereinafter, a temperature control system for a battery cell according to an embodiment of the present invention will be described with reference to FIGS. 2 to 5. FIG.

2 and 3 are views schematically showing a temperature control system of a battery cell according to an embodiment of the present invention.

2 and 3, a temperature control system 100 for a battery cell according to an embodiment of the present invention includes a temperature measurement unit 110 for measuring a temperature of a battery cell 10, A temperature controller 120 for controlling the temperature of the cell of the battery 10 and a communication unit 130 for providing the measured temperature value to the user terminal 140 and receiving feedback data from the user terminal 140, .

The temperature control system 100 of the battery cell shown in Figs. 2 and 3 is according to one embodiment, and its components are not limited to the embodiment shown in Figs. 2 and 3, Changed or deleted.

The temperature measuring unit 110 may be connected to the cell of the battery 10 to measure the temperature of the cell of the battery 10. For example, the temperature measuring unit 110 may be a temperature sensing device or a circuit including one or more temperature sensing devices.

The temperature control unit 120 may control the temperature of the battery cell 10 based on the temperature measured by the temperature measuring unit 110. To this end, the temperature control unit 120 may include a diagnosis unit 121, a first control circuit 122, and a second control circuit 123.

The diagnosis unit 121 may compare the temperature measured by the temperature measuring unit 110 and the reference value of the battery 10 cell to determine whether or not the cell of the battery 10 is abnormal.

In one embodiment, the diagnostic unit 121 diagnoses the state of the battery 10 to the first temperature state when the temperature value measured through the temperature measurement unit 110 is equal to or greater than the first reference value, When the temperature is below the second reference value, the state of the battery 10 can be diagnosed as the second temperature state. Here, the first and second reference values may be changed according to the size and type of the battery 10 and the demand of the user. For example, the battery 10 may be a lithium ion battery, and the first reference value may be 60 degrees, which is the maximum allowable temperature for the lithium ion battery to be stably driven, and the second reference value, Lt; RTI ID = 0.0 > -20 < / RTI >

The first control circuit 122 may decrease the temperature of the battery cell 10 when the diagnosis result of the diagnosis unit 121 corresponds to the first motion state. As an example, the first control circuit 122 may be a circuit comprising one or more fans (FAN).

The second control circuit 123 may increase the temperature of the battery cell 10 when the diagnosis result of the diagnosis unit 121 corresponds to the second motion state. In one example, the second control circuit 122 may be a circuit including one or more hot lines.

The communication unit 130 may provide the measured temperature value from the temperature measuring unit 110 to the user terminal 140 and receive feedback data from the user terminal 140 as a response to the provided temperature value. Here, the feedback data may be data for controlling the on / off state of the first control circuit and the second control circuit so that the user provided with the temperature value from the temperature measuring unit 110 directly controls the temperature of the battery 10 cell .

Also, the communication unit 130 may receive the pre-temperature control data through the user terminal 140 and provide the pre-temperature control data to the temperature control unit 120. The temperature control unit 120 provided with the pre-temperature control data can control the temperature of the battery 10 cell at a time corresponding to the time setting data included in the pre-temperature control data.

For example, when the user sets a time for using the vehicle through the user terminal 140, the set time setting data can be transmitted to the communication unit 130 in the temperature control system 100 of the battery cell. The time setting data transmitted to the communication unit 130 is input to the temperature control unit 120 and controls the temperature of the battery cell 10 before the time the user wishes to use the vehicle so that the user can use the vehicle immediately The appropriate temperature of the cell of the battery 10 can be controlled in advance.

In addition, the communication unit 130 may detect the position of the user terminal 140 and control the temperature of the battery 10 cell when the user terminal 140 is located at a certain distance radius of the vehicle. For this, the communication unit 130 may include a diverging unit 131 and a position detecting unit 132.

The divergence unit 131 may emit a position detection signal having a predetermined radius. Here, the predetermined distance radius may be 700 cm, which is the recognition range of the smart key.

The position detection unit 132 can detect whether the user terminal 140 is located within the detection distance of the position detection signal emitted from the divergence unit 131. [

The temperature control system 100 of the battery cell operates to measure the temperature of the battery 10 in the temperature measuring unit 110. The temperature measuring unit 110 detects the temperature of the battery 10, The temperature of the battery 10 can be adjusted between the first and second reference values through the temperature control unit 120. [

The user terminal 140 may wirelessly connect the user with the temperature control system 100 of the battery cell. For example, the user terminal 140 may be a smart terminal or a mobile terminal equipped with an application capable of performing a smart key function.

The user terminal 140 can receive the temperature value from the communication unit 130 and can provide the feedback data to the temperature controller 120 through the communication unit 130 based on the temperature value. When the temperature control unit 120 receives feedback data through the user terminal 140, the temperature control unit 120 sets the feedback data to the highest priority and controls the first control circuit 122 and the second control circuit 122 based on the feedback data. The temperature of the battery 10 can be controlled by driving the control circuit 123. For example, when the first control circuit 122 and the second control circuit 123 are operating based on the temperature value measured by the temperature measuring unit 110, the user can operate the feedback data of the user terminal 140 The first control circuit 122 and the second control circuit 123 which are operating can be stopped. Also, when the measured temperature value is in a steady state in the first and second reference value ranges, the user operates the first control circuit 122 and the second control circuit 123 by operating the feedback data of the user terminal 140 . Unlike the method of performing the temperature control when the abnormal temperature of the battery 10 is generated, this method directly manages the temperature of the battery 10 cell based on the measured temperature value by the user,

The temperature of the battery 10 cell can be adjusted before the temperature of the battery 10 cell increases to be equal to or higher than the first reference value or decreases to be equal to or lower than the second reference value. This makes it possible to more reliably perform the temperature control of the battery 10 cell to prevent the life of the battery 10 from being shortened.

Hereinafter, a method of controlling a temperature of a battery cell according to an embodiment of the present invention will be described with reference to FIGS. 4 to 6. FIG.

4 to 6 are flowcharts for explaining a method of controlling a temperature of a battery cell according to an embodiment of the present invention.

4 to 6, a method for controlling a temperature of a battery cell according to an exemplary embodiment of the present invention includes a temperature measurement step S200 for measuring a temperature of the battery cell, A control step (S300) of controlling the temperature of the battery cell based on the measured temperature value, a step of providing a measured temperature value to the user terminal, and a step of receiving the feedback data from the user terminal as a response to the temperature value (S400).

When the temperature control method of the battery cell according to an embodiment of the present invention starts, the temperature of the battery cell is measured (S200).

If the temperature value measured in step S200 is equal to or greater than the first reference value of the temperature of the battery cell, the diagnostic unit diagnoses the state of the battery to the first temperature state. If the temperature is less than the second reference value, The temperature is diagnosed (S301).

Thereafter, the first control circuit is driven when the first temperature state corresponds to the diagnosis result in step S301, and the second control circuit is driven when the second temperature state is satisfied (S302).

In addition, the measured temperature value in step S200 is transmitted to the user terminal (S401), and the user transmits feedback data using the user terminal (S402).

Upon receiving the feedback data through step S402, the temperature control step S300 sets the feedback data to the highest priority and performs temperature control of the battery cell based on the feedback data (S303).

In the receiving step S400, it is detected whether the user terminal is located within the detection distance of the position detection signal of a certain distance radius (S403). If there is a user terminal within the range, the temperature measurement step S200 and the temperature control step (S300).

The receiving step (S400) receives the pre-temperature control data from the user terminal (S404). The temperature of the battery cell can be controlled at a time corresponding to the time setting data included in the pre-temperature control data received in step S404.

The above-described method of controlling the temperature of the battery cell has been described with reference to the flowchart shown in the drawings. While the above method has been shown and described as a series of blocks for purposes of simplicity, it is to be understood that the invention is not limited to the order of the blocks, and that some blocks may be present in different orders and in different orders from that shown and described herein And various other branches, flow paths, and sequences of blocks that achieve the same or similar results may be implemented. Also, not all illustrated blocks may be required for the implementation of the methods described herein

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken as limitations. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Battery
110: Temperature measuring unit
120: Temperature control unit
130:
140: User terminal

Claims (12)

A temperature measuring unit for measuring a temperature of the battery cell;
A temperature controller for controlling a temperature of the battery cell based on the measured temperature value; And
And a communication unit for providing the measured temperature value to the user terminal and receiving feedback data from the user terminal as a response to the temperature value,
Wherein when the feedback data is received, the temperature control unit controls the temperature of the battery cell in response to the feedback data.
Temperature control system for battery cells.
The method according to claim 1,
The temperature control unit includes:
Diagnosing the state of the battery to a first temperature state when the measured temperature value is equal to or higher than a first reference value of the temperature of the battery cell and diagnosing the state of the battery to a second temperature state when the measured temperature value is lower than a second reference value, And < RTI ID = 0.0 >
Temperature control system for battery cells.
3. The method of claim 2,
The temperature control unit includes:
A first control circuit capable of decreasing a temperature of the battery cell when a diagnosis result of the diagnosis unit corresponds to the first temperature state; And
And a second control circuit that can increase the temperature of the battery cell when the diagnosis result of the diagnosis unit corresponds to the second temperature state.
Temperature control system for battery cells.
The method according to claim 1,
Wherein,
A divergence part for diverging a signal for detecting a position of a certain distance radius; And
And a position detector for detecting whether the user terminal is located within a detection distance of the signal.
Temperature control system for battery cells.
The method according to claim 1,
Wherein,
Receiving pre-temperature control data from the user terminal,
The temperature control unit includes:
And controls the temperature of the battery cell at a time corresponding to the time setting data included in the received pre-set temperature control data.
Temperature control system for battery cells.
The method according to claim 1,
And when the feedback data is received, sets the feedback data to the highest priority and controls the temperature control unit based on the feedback data.
Temperature control system for battery cells.
A temperature measuring step of measuring a temperature of the battery cell by the temperature measuring unit;
A temperature control step of controlling a temperature of the battery cell based on the measured temperature value; And
And a receiving step of providing the used terminal with the measured temperature value and receiving feedback data from the user terminal as a response to the temperature value,
Wherein the temperature control step includes the step of controlling the temperature of the battery cell in response to the feedback data when the feedback data is received.
A method of controlling temperature of a battery cell.
8. The method of claim 7,
Wherein the temperature control step comprises:
Wherein the diagnosis unit diagnoses the state of the battery to a first temperature state when the measured temperature value is equal to or greater than a first reference value of the temperature of the battery cell and diagnoses the state of the battery to a second temperature state when the measured temperature value is equal to or less than a second reference value Comprising the steps < RTI ID = 0.0 > of: <
A method of controlling temperature of a battery cell.
9. The method of claim 8,
Wherein the temperature control step comprises:
Decreasing a temperature of the battery cell when the diagnosis result of the diagnosis unit corresponds to the first temperature state; And
And increasing the temperature of the battery cell when the diagnosis result of the diagnosis unit is in the second temperature state.
A method of controlling temperature of a battery cell.
8. The method of claim 7,
Wherein the receiving step comprises:
And detecting whether the user terminal is located within a detection distance of a position detection signal of a predetermined distance radius.
A method of controlling temperature of a battery cell.
8. The method of claim 7,
Wherein the receiving step comprises:
Further comprising receiving pre-temperature control data from the user terminal,
Wherein the temperature control step comprises:
Further comprising the step of controlling the temperature of the battery cell at a time corresponding to the time setting data included in the pre-temperature control data.
A method of controlling temperature of a battery cell.
8. The method of claim 7,
Wherein the temperature control step comprises:
Further comprising setting the feedback data to a highest priority and controlling the temperature control unit based on the feedback data when the feedback data is received.
A method of controlling temperature of a battery cell.

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