Charging and discharging device and control method thereof

Abstract

The present disclosure relates to a charging / discharging device and a control method therefor, the charging / discharging device comprising: a stage unit including a plurality of arrangement regions for accommodating a plurality of battery packs each of which consists of a part of adjacent battery cells among a plurality of battery cells, and a plurality of temperature sensor units for measuring temperatures of the plurality of arrangement regions; a charging and discharging module unit for charging and discharging the plurality of cells; a plurality of blowing units that cause air to flow to the plurality of placement regions; and a control unit for controlling the plurality of temperature sensor units and the plurality of air blowing units, the control unit individually changing the air volume per unit time air speed of the plurality of air blowing units in accordance with each measured temperature measured by the plurality of temperature sensor units. According to the charge-discharge device and the control method thereof, the efficiency of a battery cell manufacturing process can be improved.

Description

Technical Field

[0001] This disclosure relates to a charging and discharging device and its control method. Specifically, it relates to a charging and discharging device and its control method for improving the manufacturing process of secondary batteries. Background Technology

[0002] The conventional manufacturing process for secondary batteries (or cells) requires a charge-discharge process after cell assembly. A charge-discharge device is one of the devices used in this process. A conventional charge-discharge device draws in external air at a constant rate and supplies it to the cell to dissipate the heat generated during charging and discharging.

[0003] However, when external air is blown onto the battery cell at a constant speed, temperature and capacity deviations may occur depending on the cell's location. Cells with severe temperature and capacity deviations are considered defective, leading to a decrease in the efficiency of the battery cell manufacturing process. In particular, with the recent trend towards larger and higher-capacity chargers, managing temperature deviations based on cell location has become even more critical. Summary of the Invention

[0004] Technical issues

[0005] First, according to one aspect of this disclosure, the efficiency of the battery cell manufacturing process can be improved.

[0006] Secondly, according to another aspect of this disclosure, the technical problem to be solved is to provide a charging and discharging device that can charge and discharge more high-capacity battery cells simultaneously.

[0007] Third, according to another aspect of this disclosure, the technical problem to be solved is to reduce the temperature deviation based on the position of the battery cell in the charging and discharging device.

[0008] Fourth, according to another aspect of this disclosure, the technical problem to be solved is to reduce the capacity deviation based on the position of the battery cell in the charging and discharging device.

[0009] On the other hand, the battery cells manufactured in the charging and discharging apparatus according to this disclosure can be widely used in green technology fields, such as electric vehicles, battery charging stations, energy storage systems (ESS), and other battery-powered photovoltaic and wind power generation. Furthermore, the battery cells manufactured in the charging and discharging apparatus according to this disclosure can be used in eco-friendly mobility devices, including electric vehicles and hybrid vehicles that mitigate climate change by reducing air pollution and greenhouse gas emissions.

[0010] Technical solution

[0011] The charging and discharging apparatus according to this disclosure may include: a worktable section including multiple configuration areas for accommodating multiple battery packs that group adjacent battery cells together, and multiple temperature sensor sections for measuring the temperature of the multiple configuration areas; a charging and discharging module section for charging and discharging the multiple battery cells; multiple air supply sections for directing airflow to the multiple configuration areas; and a control section for controlling the multiple temperature sensor sections and the multiple air supply sections. Furthermore, the control section can individually change the airflow rate per unit time of the multiple air supply sections based on each measured temperature measured by the multiple temperature sensor sections.

[0012] In one embodiment, the workbench may include a first workbench, a second workbench, and a third workbench that respectively accommodate the plurality of battery cells, wherein the second workbench is disposed above the first workbench and the third workbench is disposed above the second workbench.

[0013] Furthermore, the plurality of configuration areas of the first workbench, the plurality of configuration areas of the second workbench, and the plurality of configuration areas of the third workbench each include: a first configuration area for accommodating a first battery pack in which a portion of the plurality of battery cells are grouped together in a predetermined first configuration quantity; a second configuration area for accommodating a second battery pack in which another portion of the plurality of battery cells are grouped together in a predetermined second configuration quantity; and a third configuration area located between the first configuration area and the second configuration area for accommodating a third battery pack in which the remaining battery cells are grouped together in a predetermined third configuration quantity. The plurality of temperature sensor units of the first workbench, the plurality of temperature sensor units of the second workbench, and the plurality of temperature sensor units of the third workbench may each include: a first temperature sensor unit for measuring the temperature of the first configuration area; a second temperature sensor unit for measuring the temperature of the second configuration area; and a third temperature sensor unit for measuring the temperature of the third configuration area.

[0014] In one embodiment, the control unit may control the air volume of each of the plurality of air supply units to a first air volume when the overall average temperature of the plurality of configuration areas measured by the plurality of temperature sensor units is above a preset first reference temperature, and control the air volume of each of the plurality of air supply units to a second air volume when the overall average temperature of the plurality of configuration areas is below a preset second reference temperature.

[0015] In one embodiment, when the overall average temperature of the plurality of configuration areas exceeds the second reference temperature but is less than the first reference temperature, the control unit can control the air volume of the plurality of air supply units by comparing the sum of the differences between the overall average temperature of the plurality of configuration areas and the average temperature of each of the plurality of configuration areas with a preset reference difference value.

[0016] On the other hand, in one embodiment, the control unit can control the air volume of the plurality of air supply units by comparing the average temperature of each of the plurality of configuration areas with a preset target temperature when the overall average temperature of the plurality of configuration areas exceeds the second reference temperature but is less than the first reference temperature.

[0017] On the other hand, the control unit can start charging through the charging and discharging module unit until a preset offset time is reached, and control the air volume of each of the plurality of air supply units to a preset offset air volume.

[0018] In addition, the control unit can repeatedly measure the temperature of the multiple configuration areas through the multiple temperature sensor units every preset measurement cycle.

[0019] On the other hand, as a control method for a charging and discharging device including a worktable section for accommodating multiple battery cells, a charging and discharging module section for charging and discharging the multiple battery cells respectively, and multiple air supply sections for blowing external air to the multiple battery cells through the multiple battery cells, the control method for the charging and discharging device according to the present disclosure includes: a step of measuring the temperature of each of the multiple configuration areas of a battery pack arranged in which adjacent battery cells are grouped together by a temperature sensor section disposed on the worktable section; and a step of controlling the air volume of the multiple air supply sections according to the measured temperature.

[0020] In one embodiment, the control method of the charging and discharging device according to the present disclosure may further include: the step of activating the plurality of air supply units and the charging and discharging module unit; and the step of controlling the air volume of the plurality of air supply units with a preset offset air volume within a preset offset time after the step of activating the plurality of air supply units and the charging and discharging module unit and before the step of measuring the temperature of each of the plurality of configuration areas.

[0021] In one embodiment, the control method of the charging and discharging device according to the present disclosure may further include: after controlling the air volume of the plurality of air supply units according to the measured temperature, confirming by the charging and discharging module whether the charging and discharging of the plurality of battery cells has ended; and after the charging and discharging of the plurality of battery cells has ended, turning off the operation of the plurality of air supply units and the charging and discharging module.

[0022] In addition, the control method of the charging and discharging device according to this disclosure can repeatedly execute the following steps during the charging and discharging process of the plurality of battery cells after a preset measurement cycle: measuring the temperature of each of the plurality of configuration areas; controlling the air volume of the plurality of air supply units according to the measured temperature; and confirming whether the charging and discharging of the plurality of battery cells has ended.

[0023] The control method of the charging and discharging device according to this disclosure may further include: after the step of turning off the operation of the plurality of air supply units and the charging and discharging module units, the step of judging the battery cells whose temperature deviation or capacity deviation exceeds a preset deviation temperature or a preset deviation capacity as defective.

[0024] In one embodiment, the control method of the charging and discharging device according to the present disclosure may, in the step of controlling the air volume of the plurality of air supply units, control the air volume of each of the plurality of air supply units to a first air volume when the overall average temperature of the plurality of configuration areas measured by the plurality of temperature sensor units is above a preset first reference temperature, and control the air volume of each of the plurality of air supply units to a second air volume when the overall average temperature of the plurality of configuration areas is below a preset second reference temperature.

[0025] In one embodiment, the first reference temperature may be 45°C and the second reference temperature may be 25°C.

[0026] In one embodiment, the control method of the charging and discharging device according to the present disclosure may, in the step of controlling the air volume of the plurality of air supply units, when the overall average temperature of the plurality of configuration areas exceeds the second reference temperature and is less than the first reference temperature, if the sum of the absolute values ​​of the differences between the overall average temperature of the plurality of configuration areas and the average temperatures of the plurality of configuration areas is greater than or equal to a preset reference difference, then the air volume of each of the plurality of air supply units shall be controlled as a third air volume; if the sum of the absolute values ​​of the differences between the overall average temperature of the plurality of configuration areas and the average temperatures of the plurality of configuration areas is less than the preset reference difference, then the air volume of each of the plurality of air supply units shall be controlled as a fourth air volume.

[0027] In one embodiment, the reference difference may be 0.2°C (temperature in Celsius).

[0028] Furthermore, according to the control method of the charging and discharging device disclosed herein, in the step of controlling the air volume of the plurality of air supply units, when the overall average temperature of the plurality of configuration areas exceeds the second reference temperature and is less than the first reference temperature, if the average temperature of each of the plurality of configuration areas is above the preset target temperature, then the air volume of each of the plurality of air supply units is controlled as a third air volume; if the average temperature of each of the plurality of configuration areas is below the target temperature, then the air volume of each of the plurality of air supply units is controlled as a fourth air volume.

[0029] Technical effect

[0030] First, according to one embodiment of this disclosure, the efficiency of the battery cell manufacturing process can be improved.

[0031] Secondly, according to another embodiment of this disclosure, a charging and discharging device capable of simultaneously charging and discharging more high-capacity battery cells can be provided.

[0032] Third, according to another embodiment of this disclosure, the temperature deviation based on the position of the battery cell in the charging and discharging device can be reduced.

[0033] Fourth, according to yet another embodiment of this disclosure, the capacity deviation due to the position of the battery cell in the charging and discharging device can be reduced. Attached Figure Description

[0034] Figure 1 This is a diagram showing an example of a charging and discharging device according to the present disclosure viewed from the front;

[0035] Figure 2 This is a schematic diagram showing an example of the workbench section according to this disclosure, viewed from the side;

[0036] Figure 3 A control block diagram of a charging and discharging device according to the present disclosure is shown;

[0037] Figure 4 This is a flowchart illustrating an example of a control method for a charging / discharging device according to the present disclosure;

[0038] Figure 5 This is a flowchart illustrating a specific example of controlling the airflow of multiple air supply units based on each measured temperature;

[0039] Figure 6 This is another flowchart illustrating a specific example of controlling the airflow of multiple air supply units based on each measured temperature.

[0040] Explanation of reference numerals in the attached figures

[0041] 90: Control Department

[0042] 100: Workbench Section

[0043] 110: Battery Cell

[0044] 140: Charge / Discharge Module Section

[0045] 150: Temperature Sensor Section

[0046] 200: Air Supply Department

[0047] 1000: Charging and discharging device Detailed Implementation

[0048] The present disclosure will now be described in detail with reference to the accompanying drawings. However, this is merely an example, and the present disclosure is not limited to the specific embodiments illustrated herein.

[0049] The terms "first," "second," "third," etc., used before the components described below are merely to avoid confusion and are unrelated to the order, importance, or hierarchical relationship between the components. For example, it is also possible to implement an invention that includes only the second component and omits the first component.

[0050] The singular expressions used in this disclosure include the plural expressions, unless the context clearly indicates otherwise.

[0051] On the other hand, in this disclosure, battery, secondary battery or core are used as terms having the same meaning as cell.

[0052] Figure 1 This is a diagram showing an example of a charging and discharging device according to the present disclosure viewed from the front.

[0053] The charging and discharging apparatus 1000 according to this disclosure may include: a worktable 100 that accommodates a plurality of battery cells 110 (see [reference]). Figure 2); Charge / discharge module 140 (see Figure 3 ( ), used to charge and discharge the plurality of battery cells 110 respectively; and a plurality of air supply units 200, blowing external air to the plurality of battery cells 110 through the plurality of battery cells 110.

[0054] The charging and discharging device 1000 can refer to a battery cell charging and discharging device used to charge and discharge the battery cell in the online or offline process of the battery cell.

[0055] In this disclosure, the type of the plurality of battery cells 110 is described with a pouch shape as an example, but it is not limited thereto. The type of the plurality of battery cells 110 may also be circular or prismatic.

[0056] The workbench section 100 can accommodate the plurality of battery cells 110. See also Figure 1 As an example, the workbench section 100 may be in the form of three stacked sections along the height direction (Z direction) of the charging and discharging device 1000. That is, the workbench section 100 may include a first workbench 10, a second workbench 20 and a third workbench 30 respectively accommodating the plurality of battery cells 110, with the second workbench 20 disposed on the upper part of the first workbench 10 and the third workbench 30 disposed on the upper part of the second workbench 20.

[0057] However, this is just one example, and the number of stacked segments of the workbench section 100 can be varied in many ways.

[0058] The workbench 100 can be supported by the support 60.

[0059] The plurality of air supply units 200 can supply air by drawing in external air to the plurality of battery cells 110. The plurality of air supply units 200 can be arranged along the width direction (X direction) of the charging and discharging device 1000, separated from the worktable portion 100.

[0060] The plurality of air supply units 200 can supply air by drawing in external air to each worktable of the workbench unit 100. See, for example... Figure 1 The plurality of air supply units 200 may include: a first air supply unit 210, which blows external air to the first workbench 10; a second air supply unit 220, which blows external air to the second workbench 20; and a third air supply unit 230, which blows external air to the third workbench 30.

[0061] It may have a plurality of first air supply units 210, which are arranged side by side with the first worktable 10 along the front-rear direction of the charging and discharging device 1000.

[0062] It may have a plurality of second air supply sections 220, which are arranged side by side with the second worktable 20 along the front-rear direction of the charging and discharging device 1000.

[0063] Similarly, there may be multiple third air supply units 230, which are arranged side by side with the third worktable 30 along the front-rear direction of the charging and discharging device 1000.

[0064] The plurality of air supply units 200 may include: an electric motor (not shown) that generates rotational force; an air supply fan 21 connected to the rotating shaft of the electric motor; and an air supply duct 25 that supplies external air drawn in by the air supply fan 21 to the plurality of battery cells 110.

[0065] Furthermore, the central portion of the air supply fan 21 can be coupled to the rotating shaft of the motor. The control unit 90, described later, can control the airflow of the plurality of air supply units 200. The airflow can be defined as the amount of air moving from any air supply unit 200 through the air supply fan 21 to the worktable unit 100 per unit time. When the plurality of air supply units 200 include the air supply fan 21, the airflow will be proportional to the rotational speed of the air supply fan 21.

[0066] On the other hand, the charging and discharging apparatus 1000 according to this disclosure may also include an air supply frame 50 supporting the plurality of air supply sections 200. Since the plurality of air supply sections 200 are arranged across the worktable section 100, the air supply frame 50 may include a first air supply frame 51 located on the left side (L direction) of the worktable section 100 and a second air supply frame 52 located on the right side (R direction) of the worktable section 100.

[0067] Figure 2 This is a schematic diagram showing an example of the workbench section according to this disclosure, viewed from the side.

[0068] As described above, the worktable section 100 may include a plurality of worktables 10, 20, 30 stacked along the height direction of the charging and discharging device 1000. Figure 2 Three workbenches are shown, but this is just an example, and the number of workbenches is not limited to three.

[0069] The workbench 100 may include: a plurality of configuration areas AR for accommodating a plurality of battery groups that group adjacent cells 110 together; and a plurality of temperature sensor units 150 for measuring the temperature of the plurality of configuration areas AR.

[0070] The plurality of battery cells 110 can be grouped together in a predetermined number to form multiple battery packs. The multiple battery packs can be respectively housed in the configuration area of ​​any one of the plurality of worktables 10, 20, and 30. That is, the plurality of configuration areas AR refers to the space accommodating the plurality of battery packs.

[0071] As an example, see Figure 2 The plurality of configuration areas A11, A12, A13 of the first workbench 10, the plurality of configuration areas A21, A22, A23 of the second workbench 20, and the plurality of configuration areas A31, A32, A33 of the third workbench 30 may respectively include: a first configuration area A11, A21, A31, which accommodates a first battery pack in which a portion of the plurality of battery cells 110 are grouped together in a predetermined first configuration quantity; a second configuration area A12, A22, A32, which accommodates a second battery pack in which another portion of the plurality of battery cells 110 are grouped together in a predetermined second configuration quantity; and a third configuration area A13, A23, A33, which is located between the first configuration area A11, A21, A31 and the second configuration area A12, A22, A32, and accommodates a third battery pack in which the remaining battery cells 110 are grouped together in a predetermined third configuration quantity.

[0072] On the other hand, in each of the worktables 10, 20, and 30, along the front-to-back direction (Y direction), the length of the third configuration area A13, A23, and A33 can be longer than the length of the first configuration area A11, A21, and A31 and the length of the second configuration area A12, A22, and A32.

[0073] Therefore, in each of the worktables 10, 20, and 30, the number of the third configuration can be greater than the number of the first configuration and the number of the second configuration.

[0074] The workbench 100 may further include clamps 101 and 102 that detachably support the plurality of battery cells 110. That is, a battery cell 110 may be disposed between the clamps 101 and 102.

[0075] The clamps 101 and 102 can be located inside the air supply duct 25.

[0076] On the other hand, the charging and discharging device 1000 according to this disclosure may include a plurality of temperature sensor units 150 for measuring the temperature of the plurality of configuration regions AR.

[0077] As an example, the plurality of temperature sensor units 150 may each include a plurality of temperature sensors in the plurality of configuration areas AR to better measure the temperature of the plurality of configuration areas AR. That is, the number of temperature sensors configured in any configuration area may be multiple.

[0078] Therefore, the temperature measured by the plurality of temperature sensors in any configuration area can be the average value of the plurality of temperature sensors.

[0079] As an example, the plurality of configuration areas A11, A12, A13 of the first workbench 10, the plurality of configuration areas A21, A22, A23 of the second workbench 20, and the plurality of configuration areas A31, A32, A33 of the third workbench 30 may respectively include: a first configuration area A11, A21, A31, which accommodates a first battery pack in which a portion of the plurality of battery cells 110 are grouped together in a predetermined first configuration quantity; a second configuration area A12, A22, A32, which accommodates a second battery pack in which another portion of the plurality of battery cells 110 are grouped together in a predetermined second configuration quantity; and a third configuration area A13, A23, A33, located between the first configuration area A11, A21, A31 and the second configuration area A12, A22, A32, and accommodating a third battery pack in which the remaining battery cells 110 are grouped together in a predetermined third configuration quantity.

[0080] Additionally, the plurality of temperature sensor units 150 of the first workbench 10, the plurality of temperature sensor units 150 of the second workbench 20, and the plurality of temperature sensor units 150 of the third workbench 30 may each include: a first temperature sensor unit 151 for measuring the temperature of the first configuration areas A11, A21, and A31; a second temperature sensor unit 152 for measuring the temperature of the second configuration areas A12, A22, and A32; and a second temperature sensor unit 153 for measuring the temperature of the third configuration areas A13, A23, and A33.

[0081] In addition, the first temperature sensor unit 151, the second temperature sensor unit 152 and the third temperature sensor unit 153 may each include a plurality of temperature sensors.

[0082] The plurality of temperature sensor units 150 may be located in the lower part of the fixtures 101 and 102 in the worktable part 100. Therefore, the plurality of temperature sensor units 150 may be located in the lower part of one side of the fixtures 101 and 102 or on the bottom surface of the fixtures 101 and 102 in each of the worktables 10, 20 and 30.

[0083] Additionally, see Figure 1 and Figure 2The worktable 10 may have multiple first air supply sections 210. A portion of the multiple first air supply sections 210 may blow air into a first configuration area A11 of the first worktable 10, another portion of the multiple first air supply sections 210 may blow air into a second configuration area A12 of the first worktable 10, and the remaining portion of the multiple first air supply sections 210 may blow air into a third configuration area A13 of the first worktable 10.

[0084] Additionally, the system may have multiple second air supply sections 220. A portion of the multiple second air supply sections 220 may blow air into a first configuration area A21 of the second workbench 20, another portion of the multiple second air supply sections 220 may blow air into a second configuration area A22 of the second workbench 20, and the remaining portion of the multiple second air supply sections 220 may blow air into a third configuration area A23 of the second workbench 20.

[0085] Similarly, multiple third air supply units 230 may be provided. A portion of the multiple third air supply units 230 may blow air into the first configuration area A31 of the third workbench 30, another portion of the multiple third air supply units 230 may blow air into the second configuration area A32 of the third workbench 30, and the remaining portion of the multiple third air supply units 230 may blow air into the third configuration area A33 of the third workbench 30.

[0086] Figure 3 A control block diagram of a charging and discharging device according to the present disclosure is shown.

[0087] According to the charging and discharging device 1000 of this disclosure (see also...) Figure 1 This may include: workbench section 100 (see...) Figure 1 The system includes multiple configuration areas AR for accommodating multiple battery packs that group adjacent battery cells 110 together, and multiple temperature sensor units 150 for measuring the temperature of the multiple configuration areas AR; a charge / discharge module unit 140 for charging and discharging the multiple battery cells 110; multiple air supply units 200 for directing airflow to the multiple configuration areas AR; and a control unit 90 for controlling the multiple temperature sensor units 150 and the multiple air supply units 200. Furthermore, based on the measured temperatures obtained by the multiple temperature sensor units 150, the control unit 90 can individually change the airflow rate per unit time of the multiple air supply units 200.

[0088] The control unit 90 can measure the temperature of each configured area through the plurality of temperature sensor units 150 every preset measurement cycle, and then control the plurality of air supply units 200 based on this.

[0089] As an example, the plurality of air supply units 200 may include twelve air supply fans 21 arranged side by side with each of the worktables 10, 20, and 30 (see [link to documentation]). Figure 1 Each of the worktables 10, 20, and 30 includes two fans 21 in its first configuration areas A11, A21, and A31 and its second configuration areas A12, A22, and A32, and the third configuration areas A13, A23, and A33 of each worktable 10, 20, and 30 may include eight fans 21.

[0090] In addition, for the plurality of temperature sensor units 150, the first temperature sensor unit 151 and the second temperature sensor unit 152 of each worktable 10, 20, 30 may each include two temperature sensors, and the third temperature sensor unit 153 may include six temperature sensors.

[0091] However, this is just one example, and the number of the plurality of air supply units 200 and the plurality of temperature sensor units 150 can be varied according to the design.

[0092] The control unit 90 can charge and discharge the plurality of battery cells 110 housed in the workbench unit 100 by controlling the charge and discharge module unit 140. The charge and discharge module unit 140 can charge and discharge a certain number of the plurality of battery cells 110. Therefore, multiple charge and discharge module units 140 can be provided for charging and discharging the plurality of battery cells 110.

[0093] In addition, the control unit 90 can confirm whether the charging and discharging of the plurality of battery cells 110 has ended through the charging and discharging module unit 140.

[0094] In addition, the control unit 90 can control the input / output unit 190, which is used to receive user commands or display execution status and execution results.

[0095] Figure 4 This is a flowchart illustrating an example of a control method for a charging and discharging device according to the present disclosure.

[0096] See Figure 2 and Figure 4 As a workbench section 100 that accommodates multiple battery cells 110 and a charge / discharge module section 140 for charging and discharging the multiple battery cells 110 respectively (see...) Figure 3 ) and multiple air supply units 200 that blow external air to the multiple battery cells 110 through the multiple battery cells 110 (see Figure 1The control method of the charging and discharging device 1000 according to the present disclosure may include: step S30, measuring the temperature of each of the plurality of configuration areas AR in which a battery pack consisting of adjacent cells 110 of the plurality of cells 110 is configured by a temperature sensor unit 150 disposed on the worktable unit 100; and step S40, controlling the air volume of the plurality of air supply units 200 according to the measured temperature.

[0097] The control method of the charging and discharging device 1000 according to this disclosure may further include: step S10 of activating the plurality of air supply units 200 and the charging and discharging module unit 140; and step S20 of controlling the air volume of the plurality of air supply units 200 with a preset offset air volume within a preset offset time period before step S30 of measuring the temperature of each of the plurality of configuration areas AR after step S10 of activating the plurality of air supply units 200 and the charging and discharging module unit 140.

[0098] In step S10, which involves activating the plurality of air supply units 200 and the charging / discharging module unit 140, the control unit 90 can begin operation by receiving a start input from the charging / discharging device 1000. That is, the user can start the operation of the charging / discharging device 1000 through the input / output unit 190.

[0099] Step S20, which controls the air volume of the plurality of air supply units 200 with the offset air volume, is used to control the air volume of the plurality of air supply units 200 within the offset time required for warming up after the charging and discharging device 1000 is started and reaches the steady state.

[0100] That is, the control unit 90 can start charging and discharging through the charging and discharging module unit 140 until a preset offset time is reached, and control the air volume of each of the plurality of air supply units 200 to a preset offset air volume.

[0101] As an example, the offset time could be 10 minutes.

[0102] Additionally, the offset airflow can be an airflow setting value set for individually controlling the airflow of the plurality of air supply units 200. As an example, in the offset airflow, the control unit 90 can adjust the airflow of the first air supply unit 210 (see...) Figure 1 The airflow of the second air supply section 220 (see [reference]) is controlled to 100% of the maximum airflow of the first air supply section 210. Figure 1 The airflow of the third air supply section 230 is controlled to 100% of the maximum airflow of the second air supply section 220, and the airflow of the third air supply section 230 (see...) is controlled to 100% of the maximum airflow of the second air supply section 220. Figure 1The air volume is controlled to be 50% of the maximum air volume of the third air supply unit 230.

[0103] Additionally, the control method of the charging and discharging device 1000 according to this disclosure may further include: after step S40 of controlling the air volume of the plurality of air supply sections 200 according to the measured temperature, step S50 of confirming by the charging and discharging module section 140 whether the charging and discharging of the plurality of battery cells 110 has ended; and step S60 of turning off the operation of the plurality of air supply sections 200 and the charging and discharging module section when the charging and discharging of the plurality of battery cells 110 has ended.

[0104] In step S50, which confirms whether the charging and discharging of the plurality of battery cells 110 has ended, the control method of the charging and discharging device 1000 of this disclosure can be used to turn off the plurality of air supply units 200 and the charging and discharging module unit after the charging and discharging module unit 140 confirms that the charging and discharging of the plurality of battery cells 110 has ended.

[0105] In addition, according to the control method of the charging and discharging device 1000 disclosed herein, when a preset measurement cycle (S55) has elapsed during the charging and discharging process of the plurality of battery cells 110, the following steps are repeatedly executed: step S30 of measuring the temperature of each of the plurality of configuration areas AR, step S40 of controlling the air volume of the plurality of air supply units 200 according to the measured temperature, and step S50 of confirming whether the charging and discharging of the plurality of battery cells 110 has ended.

[0106] That is, the control unit 90 can repeatedly measure the temperature of the multiple configuration areas AR through the multiple temperature sensor units 150 every preset measurement cycle.

[0107] Furthermore, the control unit 90 can control the air volume of the plurality of air supply units 200 according to each measured temperature, and the charging and discharging module unit 140 can confirm whether the charging and discharging of the plurality of battery cells 110 has ended.

[0108] At this time, according to the control method of the charging and discharging device 1000 of this disclosure, the charging and discharging module 140 can confirm that the charging and discharging of the plurality of battery cells 110 has not ended. When the charging and discharging process of the plurality of battery cells 110 passes through a preset measurement cycle (S55), the following steps are repeatedly executed: step S30 of measuring the measurement temperature of each of the plurality of configuration areas AR, step S40 of controlling the air volume of the plurality of air supply units 200 according to the measurement temperature, and step S50 of confirming whether the charging and discharging of the plurality of battery cells 110 has ended.

[0109] Since the step S30 of measuring the temperature of each of the plurality of configuration areas AR, the step S40 of controlling the air volume of the plurality of air supply units 200 according to the measured temperature, and the step S50 of confirming whether the charging and discharging of the plurality of battery cells 110 has ended are repeatedly executed by the measurement cycle, the control method of the charging and discharging device 1000 of this disclosure can effectively manage the temperature deviation and capacity deviation of the plurality of battery cells.

[0110] As an example, the measurement period could be 30 seconds.

[0111] In addition, the control method of the charging and discharging device 1000 according to this disclosure may further include: after step S60 of turning off the operation of the plurality of air supply units 200 and the charging and discharging module unit 140, step S70 of judging the battery cells 110 whose temperature deviation or capacity deviation exceeds a preset deviation temperature or a preset deviation capacity as defective.

[0112] After the charging and discharging of the plurality of battery cells 110 is completed, if the measured temperature of each of the plurality of battery cells 110 measured by the temperature sensor unit 150 exceeds a predetermined number of median values, the battery cell 110 having a final temperature deviation exceeding the predetermined number of median values ​​can be judged as defective according to the control method of the charging and discharging device 1000 of this disclosure.

[0113] As an example, the predetermined quantity can be 30, and the final temperature deviation can be 2.5℃ (Celsius).

[0114] Figure 5 This is a flowchart illustrating a specific example of controlling the airflow of multiple air supply units based on each measured temperature.

[0115] See Figure 5 Step S40, which controls the air volume of the plurality of air supply units 200 according to the measured temperatures, may include: step S41, which controls the air volume of the plurality of air supply units 200 according to the overall average temperature of the plurality of configuration areas AR; and step S45, which controls the air volume of the plurality of air supply units 200 according to the absolute value of the difference between the average temperature of each of the plurality of configuration areas AR and the overall average temperature.

[0116] In step S41, which controls the airflow of the plurality of air supply units 200 based on the overall average temperature of the plurality of configuration areas AR, the control method of the charging and discharging device 1000 of this disclosure can control the airflow of each of the plurality of air supply units 200 to a first airflow when the overall average temperature T_avg_A of the plurality of configuration areas AR measured by the plurality of temperature sensor units 150 is above a preset first reference temperature (S411), and control the airflow of each of the plurality of air supply units 200 to a second airflow when the overall average temperature T_avg_A of the plurality of configuration areas AR is below a preset second reference temperature (S415) (S414).

[0117] In one embodiment, the first reference temperature may be 45°C and the second reference temperature may be 25°C.

[0118] The first reference temperature and the second reference temperature may vary depending on the number of the plurality of configuration areas AR and the number of stacked worktables of the worktable section 100.

[0119] Similar to the offset air volume, the first air volume and the second air volume can be air volume setting values ​​set for individually controlling the air volume of the plurality of air supply units 200.

[0120] As an example, in the first air volume, the control unit 90 can control the first air supply unit 210 (see...) Figure 1 The airflow of the second air supply section 220 (see [reference]) is controlled to 100% of the maximum airflow of the first air supply section 210. Figure 1 The airflow of the third air supply section 230 is controlled to 100% of the maximum airflow of the second air supply section 220, and the airflow of the third air supply section 230 (see...) is controlled to 100% of the maximum airflow of the second air supply section 220. Figure 1 The air volume control is for the third air supply unit 230 (see...) Figure 1 50% of the maximum air volume.

[0121] As an example, in the second air volume, the control unit 90 can control the air volume of the first air supply unit 210 to 20% of the maximum air volume of the first air supply unit 210, control the air volume of the second air supply unit 220 to 20% of the maximum air volume of the second air supply unit 220, and control the air volume of the third air supply unit 230 to 20% of the maximum air volume of the third air supply unit 230.

[0122] Furthermore, in step S45, which controls the airflow of the plurality of air supply units 200 based on the absolute value of the difference between the average temperature T_avg_x of the plurality of configuration areas AR and the overall average temperature T_avg_A, the control method of the charging and discharging device 1000 of this disclosure allows for the following: when the overall average temperature of the plurality of configuration areas AR exceeds the second reference temperature but is less than the first reference temperature, when the sum of the absolute values ​​of the differences between the overall average temperature of the plurality of configuration areas AR and the average temperatures of the plurality of configuration areas AR is greater than or equal to a preset reference difference (S451), the airflow of the plurality of air supply units 200 is controlled as a third airflow (S452); and when the sum of the absolute values ​​of the differences between the overall average temperature of the plurality of configuration areas AR and the average temperatures of the plurality of configuration areas AR is less than the preset reference difference, the airflow of the plurality of air supply units 200 is controlled as a fourth airflow (S454).

[0123] In one embodiment, the reference difference may be 0.2°C (temperature in Celsius). The reference difference may vary depending on the number of the plurality of configuration areas AR and the number of stacked worktables in the worktable section 100.

[0124] The third and fourth air volumes can also be air volume setting values ​​set to individually control the air volume of the plurality of air supply units 200 under given conditions.

[0125] As an example, in the third air volume, the control unit 90 can control a plurality of first air supply units 210 (see...). Figure 1 The airflow of the second air supply section 220 (see [reference]) is controlled to 100% of the maximum airflow of the first air supply section 210. Figure 1 The airflow of the third air supply section 230 is controlled to 100% of the maximum airflow of the second air supply section 220. The airflow of the third air supply section 230, which discharges air to the first configuration area A31 of the third workbench 30 and the third air supply section 230, which discharges air to the second configuration area A32 of the third workbench 30, is controlled to 70% of the maximum airflow of each of the third air supply sections 230. Furthermore, the airflow of the third air supply section 230, which discharges air to the third configuration area A33 of the third workbench 30, can be controlled to 50% of the maximum airflow of the third air supply section 230.

[0126] As an example, in the second air volume, the control unit 90 can control the air volume of the first air supply unit 210 to 20% of the maximum air volume of the first air supply unit 210, control the air volume of the second air supply unit 220 to 20% of the maximum air volume of the second air supply unit 220, and control the air volume of the third air supply unit 230 to 20% of the maximum air volume of the third air supply unit 230.

[0127] [Table 1]

[0128]

[0129] Table 1 summarizes the utilization Figure 5 When the control method shown (Example 1) controls the air volume of the plurality of air supply units 200, the sum of the final temperature deviations of the plurality of battery cells 110 respectively contained in each of the worktables 10, 20, and 30 is the sum of the final temperature deviations of Comparative Example 1 (the case where there is no air volume control of the plurality of air supply units 200).

[0130] The final temperature deviation refers to the sum of the absolute values ​​of the differences between the individual temperatures of the plurality of battery cells 110 contained in each of the worktables 10, 20, and 30 and the total average temperature of the plurality of battery cells 110 at the end of the charging and discharging process.

[0131] The notes in Table 1 show the percentage value of the difference between Comparative Example 1 and Example 1 divided by Comparative Example 1 and multiplied by 100. As can be seen from Table 1, when the charging and discharging device 1000 is controlled using Example 1, the temperature deviation of the multiple battery cells 110 contained in each of the worktables 10, 20, and 30 is reduced compared to Comparative Example 1.

[0132] Table 1 shows the results of one example of using a charging and discharging device 1000 including three worktables 10, 20, and 30. The charging and discharging device 1000 according to this disclosure is not limited to three worktables.

[0133] Figure 6 This is another flowchart illustrating a specific example of controlling the airflow of multiple air supply units based on each measured temperature.

[0134] See Figure 6 Step S40, which controls the air volume of the plurality of air supply units 200 according to the measured temperatures, may include: step S41, which controls the air volume of the plurality of air supply units 200 according to the overall average temperature of the plurality of configuration areas AR; and step S42, which controls the air volume of the plurality of air supply units 200 according to the average temperature of the plurality of configuration areas AR and a preset target temperature.

[0135] The explanation of step S41 regarding controlling the air volume of the multiple air supply units 200 based on the overall average temperature of the multiple configuration areas AR is as follows: Figure 5 The description is the same as above, therefore the description is omitted.

[0136] In step S42, which controls the airflow of the plurality of air supply units 200 based on the average temperature T_avg_x of each of the plurality of configuration areas AR and the preset target temperature, according to the control method of the charging and discharging device 1000 of this disclosure, when the overall average temperature of the plurality of configuration areas AR exceeds the second reference temperature but is less than the first reference temperature, when the average temperature T_avg_x of each of the plurality of configuration areas AR is above the preset target temperature (S421), the airflow of each of the plurality of air supply units 200 is controlled as a third airflow (S422), and when the average temperature of each of the plurality of configuration areas AR is less than the target temperature, the airflow of each of the plurality of air supply units 200 is controlled as a fourth airflow (S424).

[0137] The third and fourth air volumes can also be air volume setting values ​​set to individually control the air volume of the plurality of air supply units 200 under given conditions.

[0138] As an example, in the third air volume, the control unit 90 can control a plurality of first air supply units 210 (see...). Figure 1 The airflow of the second air supply section 220 (see [reference]) is controlled to 100% of the maximum airflow of the first air supply section 210. Figure 1 The airflow of the third air supply section 230 is controlled to 100% of the maximum airflow of the second air supply section 220. The airflow of the third air supply section 230, which discharges air to the first configuration area A31 of the third workbench 30 and the third air supply section 230, which discharges air to the second configuration area A32 of the third workbench 30, is controlled to 70% of the maximum airflow of each of the third air supply sections 230. Furthermore, the airflow of the third air supply section 230, which discharges air to the third configuration area A33 of the third workbench 30, can be controlled to 50% of the maximum airflow of the third air supply section 230.

[0139] As an example, in the second air volume, the control unit 90 can control the air volume of the first air supply unit 210 to 20% of the maximum air volume of the first air supply unit 210, control the air volume of the second air supply unit 220 to 20% of the maximum air volume of the second air supply unit 220, and control the air volume of the third air supply unit 230 to 20% of the maximum air volume of the third air supply unit 230.

[0140] In contrast, in step S42, which controls the airflow of the plurality of air supply units 200 based on the average temperature of each of the plurality of configuration areas AR and a preset target temperature, the control method of the charging and discharging device 1000 of this disclosure can control the airflow of each of the plurality of air supply units 200 to a fifth airflow when the overall average temperature of the plurality of configuration areas AR exceeds the second reference temperature but is less than the first reference temperature, and when the average temperature of each of the plurality of configuration areas AR is above the preset target temperature (S421), and when the average temperature of each of the plurality of configuration areas AR is less than the target temperature, control the airflow of each of the plurality of air supply units 200 to a sixth airflow.

[0141] The fifth and sixth air volumes can also be air volume setting values ​​set to individually control the air volume of the plurality of air supply units 200 under given conditions.

[0142] [Table 2]

[0143]

[0144] Table 2 summarizes the utilization Figure 6 When the control method shown (Example 2) controls the air volume of the plurality of air supply units 200, the sum of the final capacity deviations of the plurality of battery cells 110 respectively contained in each of the worktables 10, 20, and 30 is the sum of the final capacity deviations of Comparison 1 (the case where there is no air volume control of the plurality of air supply units 200).

[0145] The final capacity deviation refers to the sum of the absolute values ​​of the differences between the individual capacities of the plurality of battery cells 110 respectively contained in each of the worktables 10, 20, and 30 and the total average capacity of the plurality of battery cells 110 at the end of charging and discharging.

[0146] The notes in Table 2 show the percentage value of the difference between Comparative Example 2 and Example 2 divided by Comparative Example 2 and multiplied by 100. Referring to Table 2, it can be seen that when the charging and discharging device 1000 is controlled using Example 2, the capacity deviation of the multiple battery cells 110 contained in each of the worktables 10, 20, and 30 is reduced compared to Comparative Example 2.

[0147] Table 2 shows the results of one example of using a charging and discharging device 1000 comprising three worktables 10, 20, and 30. The charging and discharging device 1000 according to this disclosure is not limited to three worktables.

[0148] The above description is merely an example of applying the principles of this disclosure, and other components may be included without departing from the scope of this invention.

Claims

1. A charging and discharging device, comprising: The worktable includes multiple configuration areas for accommodating multiple battery packs that form a group of adjacent cells among multiple battery cells, and multiple temperature sensor units for measuring the temperature of the multiple configuration areas. A charging and discharging module is used for charging and discharging the plurality of battery cells; Multiple air supply units allow air to flow to the multiple configuration areas; as well as The control unit controls the plurality of temperature sensor units and the plurality of air supply units. The control unit individually changes the air volume, which is the wind speed per unit time of the plurality of air supply units, based on the measured temperature measured by the plurality of temperature sensors.

2. The charging and discharging device according to claim 1, wherein: The workbench section includes a first workbench, a second workbench, and a third workbench, which respectively accommodate the plurality of battery cells. The second workbench is positioned above the first workbench. The third workbench is positioned above the second workbench.

3. The charging and discharging device according to claim 2, wherein: The plurality of configuration areas of the first workbench, the plurality of configuration areas of the second workbench, and the plurality of configuration areas of the third workbench respectively include: The first configuration area accommodates a first battery pack in which a portion of the multiple battery cells are grouped together in a predetermined first configuration quantity. The second configuration area accommodates a second battery pack that groups another portion of the plurality of battery cells together in a predetermined second configuration quantity; and The third configuration area, located between the first configuration area and the second configuration area, accommodates a third battery pack in which the remaining cells from the plurality of battery cells are grouped together in a predetermined third configuration quantity. The multiple temperature sensor units of the first worktable, the multiple temperature sensor units of the second worktable, and the multiple temperature sensor units of the third worktable respectively include: The first temperature sensor measures the temperature of the first configuration area; The second temperature sensor measures the temperature of the second configuration area; and The third temperature sensor measures the temperature of the third configuration area.

4. The charging and discharging device according to any one of claims 1 to 3, wherein: When the overall average temperature of the multiple configuration areas measured by the multiple temperature sensors is above a preset first reference temperature, the control unit controls the air volume of each of the multiple air supply units to a first air volume; when the overall average temperature of the multiple configuration areas is below a preset second reference temperature, the control unit controls the air volume of each of the multiple air supply units to a second air volume.

5. The charging and discharging device according to claim 4, wherein: When the overall average temperature of the multiple configuration areas exceeds the second reference temperature but is less than the first reference temperature, the control unit controls the air volume of the multiple air supply units by comparing the sum of the differences between the overall average temperature of the multiple configuration areas and the average temperature of each of the multiple configuration areas with a preset reference difference value.

6. The charging and discharging device according to claim 5, wherein: When the overall average temperature of the multiple configuration areas exceeds the second reference temperature but is less than the first reference temperature, the control unit controls the air volume of the multiple air supply units by comparing the average temperature of each of the multiple configuration areas with a preset target temperature.

7. The charging and discharging device according to any one of claims 1 to 3, wherein: The control unit starts charging through the charging and discharging module until a preset offset time is reached, and controls the air volume of each of the plurality of air supply units to a preset offset air volume.

8. The charging and discharging device according to any one of claims 1 to 3, wherein: The control unit repeatedly measures the temperature of the multiple configuration areas through the multiple temperature sensors every preset measurement cycle.

9. A method for controlling a charging and discharging device, comprising a worktable section for accommodating a plurality of battery cells, a charging and discharging module section for charging and discharging the plurality of battery cells respectively, and a plurality of air supply sections for blowing external air onto the plurality of battery cells through the plurality of battery cells, the method comprising: The step of measuring the temperature of each of the multiple configuration areas of a battery pack in which the multiple cells are grouped together by means of a temperature sensor unit configured on the workbench. as well as The steps of controlling the air volume of the plurality of air supply units based on the measured temperatures.

10. The control method for the charging and discharging device according to claim 9, wherein, Also includes: After the step of controlling the air volume of the plurality of air supply units according to the measured temperature, the step of confirming whether the charging and discharging of the plurality of battery cells is completed by the charging and discharging module unit. as well as The step of shutting down the multiple air supply units and the charging / discharging module unit when the charging / discharging of the multiple battery cells is completed.

11. The control method for the charging and discharging device according to claim 9 or 10, wherein, The following process is repeated every preset measurement cycle during the charging and discharging of the multiple battery cells: The steps for measuring the temperature of each of the multiple configuration areas; The steps of controlling the air volume of the plurality of air supply units according to the measured temperatures; and The step of confirming whether the charging and discharging of the multiple battery cells has ended.

12. The control method for the charging and discharging device according to claim 10, wherein, Also includes: After the steps of shutting down the multiple air supply units and the charging and discharging module units, the step of judging the battery cells whose temperature deviation or capacity deviation exceeds the preset deviation temperature or preset deviation capacity as defective.

13. The control method for the charging and discharging device according to claim 9 or 10, wherein: In the step of controlling the air volume of the plurality of air supply units When the overall average temperature of the multiple configuration areas measured by the multiple temperature sensors is above a preset first reference temperature, the airflow of each of the multiple air supply units is controlled to a first airflow. When the overall average temperature of the multiple configuration areas is below a preset second reference temperature, the air volume of each of the multiple air supply units is controlled to the second air volume.

14. The control method for the charging and discharging device according to claim 13, wherein: In the step of controlling the air volume of the plurality of air supply units When the overall average temperature of the multiple configuration areas exceeds the second reference temperature but is less than the first reference temperature, and when the sum of the absolute values ​​of the differences between the overall average temperature of the multiple configuration areas and the average temperatures of each of the multiple configuration areas is greater than or equal to a preset reference difference, the airflow of each of the multiple air supply units is controlled to a third airflow. When the sum of the absolute values ​​of the differences between the overall average temperature of the multiple configuration areas and the average temperature of each of the multiple configuration areas is less than a preset reference difference, the air volume of each of the multiple air supply units is controlled as a fourth air volume.

15. The control method for the charging and discharging device according to claim 13, wherein: In the step of controlling the air volume of the plurality of air supply units When the overall average temperature of the multiple configuration areas exceeds the second reference temperature but is less than the first reference temperature, and when the average temperature of each of the multiple configuration areas is above a preset target temperature, the airflow of each of the multiple air supply units is controlled to a third airflow. When the average temperature of each of the plurality of configuration zones is lower than the target temperature, the air volume of each of the plurality of air supply units is controlled to a fourth air volume.

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