A charging / discharging device that maintains an insulated environment without temperature deviation between battery cells in the chamber

Abstract

The present invention relates to a charging / discharging device that applies a charging / discharging current in a chamber that maintains a constant temperature by air circulation, and solves the temperature deviation caused by the difference in cooling level of battery cells in the chamber. In the case of a high-power battery cell under high-rate discharge conditions that generates a lot of heat, the present invention relates to a charging / discharging device and a charging / discharging method thereof that maintain an insulated environment in which no temperature deviation occurs between battery cells in a chamber, including a cylindrical insulation function for preventing temperature deviation caused by direct air circulation, for practical performance analysis.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0106043, filed August 24, 2022, and all contents disclosed in the Korean Patent Application are incorporated herein by reference.

[0002] The present invention relates to a charging / discharging device and a charging / discharging method for maintaining an insulated environment without temperature deviation between battery cells in a chamber, and more particularly, to a charging / discharging device that applies a charging / discharging current to a chamber that maintains a constant temperature through air circulation, and solves the temperature deviation caused by differences in cooling levels of battery cells in the chamber. For practical performance analysis of high-power battery cells under high-rate discharge conditions that generate a lot of heat, the charging / discharging device and a charging / discharging method for maintaining an insulated environment without temperature deviation between battery cells in the chamber include a cylindrical insulating function to prevent temperature deviation caused by direct air circulation. [Background technology]

[0003] As the safety and capacity of rechargeable lithium secondary batteries are rapidly improved, the types of devices that use the lithium secondary batteries as an energy source are increasing.

[0004] With technological development and increasing demand for electric vehicles, the demand for secondary batteries as an energy source is increasing rapidly.

[0005] For example, the lithium secondary battery is widely used as an energy source for wireless mobile devices or wearable devices, which are multifunctional small products, and is also used as a medium- to large-sized battery pack for use as an energy source or energy storage system (ESS) for electric vehicles and hybrid electric vehicles, which are presented as alternatives to existing gasoline and diesel vehicles that cause air pollution.

[0006] Lithium secondary batteries are classified into cylindrical and prismatic secondary batteries, in which an electrode assembly is housed in a cylindrical or prismatic metal case, and pouch-type secondary batteries, in which an electrode assembly is housed in a pouch-type case made of an aluminum laminate sheet, depending on the shape of the battery case. Among these, cylindrical secondary batteries have the advantages of relatively large capacity and structural safety.

[0007] An electrode assembly used in a cylindrical secondary battery is wound into a generally cylindrical shape so that it can be appropriately accommodated in a cylindrical can. More specifically, a cylindrical electrode assembly is formed by stacking a positive electrode, a separator, and a negative electrode and winding them multiple times into a generally cylindrical shape. The positive electrode is formed by coating a positive electrode plate with a positive electrode active material (e.g., a layered compound containing lithium), and the separator is made of porous polyethylene (PE) or polypropylene (PP) to allow lithium ions to move. The negative electrode is formed by coating a negative electrode plate with a negative electrode active material (e.g., a carbon-based material). A positive electrode tab is connected to the positive electrode plate, and a negative electrode tab is connected to the negative electrode plate, both of which extend outward by a predetermined length.

[0008] Recently, cylindrical lithium-ion batteries with high energy density have been widely used, and the demand for such secondary batteries is increasing due to the advantages mentioned above.

[0009] Meanwhile, secondary batteries are manufactured through a process of assembling cells and activating the batteries. During the battery activation stage, the battery cells are mounted on a designated jig and charged under the conditions required for activation.

[0010] Overheating of battery cells can shorten their lifespan, and if the battery cell explodes due to thermal runaway, it can also affect the device in which the battery cell is installed. Therefore, controlling the temperature of battery cells is an important issue.

[0011] In such a charging / discharging device for measuring temperature changes due to charging / discharging of a battery cell, there is a need to solve the phenomenon in which the cooling effect of the battery cell varies depending on the charging / discharging position of the battery cell in a method of convection on the sides or top and bottom of the chamber due to air circulation.

[0012] In addition, in order to prevent direct air circulation around the battery cell and maintain a constant temperature, temperature measurement is required using a charge / discharge device that can function as a heat insulator around the battery cell.

[0013] Japanese Patent No. 3057556 discloses a method for charging and discharging a secondary battery, which comprises inserting and holding secondary batteries in a pallet having a plurality of bottomed battery holding holes with insertion holes for power terminals formed in the bottom, connecting power terminals to the bottom end faces and positive terminals of the secondary batteries, and charging and discharging the secondary batteries by pushing the secondary batteries inserted and held in the battery holding holes from below with the power terminals for charging and discharging so that they protrude from the upper faces of the battery holding holes and are held in a state where the surfaces of the secondary batteries are exposed, and charging and discharging are performed while blowing air over the exposed surfaces of the secondary batteries. However, no technology has been identified for a charging and discharging device that can solve the temperature deviation of multiple cylindrical batteries.

[0014] In Chinese Utility Model Patent No. 207441892, a battery tray includes a clip assembly consisting of a base made of a cooling material and a pair of clips, with a semicircular groove on one side of the clip assembly. The two clips, arranged facing each other, form a cylindrical clip groove for positioning the batteries, and the two clips, arranged facing each other, include a fixed block and a movable block. The base of the clamp assembly passes through a pusher column, both ends of the pusher column are fixed to the base, and adjacent clamp assemblies are connected to each other by springs. The document also discloses a charging / discharging device in which a battery pallet is disposed on the cold end surface of a cooling plate. However, no technology has been identified for a charging / discharging device that can resolve the temperature deviation of multiple cylindrical batteries.

[0015] Korean Patent Publication No. 10-2387606 discloses a cylindrical battery cell charging / discharging jig for charging / discharging at least one cylindrical battery cell for testing the battery cell, the jig including a body member and a cylindrical battery cell charging / discharging jig, the cylindrical battery cell charging / discharging jig including a panel member, a battery cell receiving member, a battery cell current-carrying unit, and a lifting unit. However, no technology related to a charging / discharging device that can resolve temperature deviations among multiple cylindrical batteries has been identified.

[0016] Thus, Japanese Patent No. 3057556 is a technology for charging and discharging cylindrical battery cells while exposing their surfaces to a fan, Chinese Utility Model No. 207441892 is a charging and discharging technology including a base and cooling plate using a cooling material, and Korean Patent No. 10-2387606 is a technology for a current-carrying fixture for charging and discharging cylindrical battery cells. The technology aims to resolve temperature deviations that occur due to differences in cooling levels between battery cells in a charging and discharging device that applies charging and discharging current within a chamber that maintains a constant temperature through air circulation. However, in the case of high-power battery cells under high-rate discharge conditions that generate a lot of heat, the current does not suggest a charging and discharging device configuration that maintains an insulated environment that does not cause temperature deviations between battery cells within a chamber, including a cylindrical insulating function to prevent temperature deviations due to direct air circulation, for actual performance analysis. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] Patent No. 3057556 [Patent Document 2] China Utility Model Patent No. 207441892 [Patent Document 3] Korean Patent Registration No. 10-2387606 Summary of the Invention [Problem to be solved by the invention]

[0018] The present invention has been made to solve the above problems, and aims to solve the temperature deviation caused by the difference in cooling levels of battery cells in a charging / discharging device that applies a charging / discharging current in a chamber that maintains a constant temperature through air circulation. In the case of high-power battery cells under high-rate discharge conditions that generate a lot of heat, the present invention aims to provide a charging / discharging device and a charging / discharging method that maintains an insulated environment where no temperature deviation occurs between battery cells in a chamber, including a cylindrical insulating function to prevent temperature deviation caused by direct air circulation for actual performance analysis. [Means for solving the problem]

[0019] To achieve this object, the charging / discharging device according to the present invention may include a chamber, a main frame on which a plurality of cylindrical battery cells formed in the chamber are mounted, a charging / discharging means formed in the main frame for charging or discharging the battery cells, a jig that is placed on or removed from the outer surface of the battery cells to reduce temperature deviation between the battery cells, a transport means for transporting the jig, and a blower means for circulating air within the chamber.

[0020] The battery cells may be coupled to the upper and lower charging / discharging portions of the charging / discharging means and mounted on the main frame.

[0021] The transfer means can simultaneously transfer a plurality of jigs to place or remove them at predetermined positions on the outer surfaces of the cylindrical battery cells.

[0022] The transport means may include a jig support that supports the jig, and a sub-frame to which a plurality of the jig supports are fixed.

[0023] The transporting means may include a rotating section that rotates the jig support and a moving section that moves the sub-frame.

[0024] One or more of the air blowing means may be provided on one or more sides of the chamber.

[0025] The jig may have a structure for accommodating the battery cell.

[0026] The jig may be formed in the same shape as the outer shape of the battery cell, and may expose 5% to 60% of the outer area of the battery cell.

[0027] The jig may be made of insulating material.

[0028] To achieve the above object, a charging / discharging method for a charging / discharging device according to the present invention includes a first step of mounting a plurality of cylindrical battery cells on a main frame within a chamber; a second step of rotating a jig fixed to a jig support to position the jig at an equal distance from the battery cells; a third step of using a transport means to move a sub-frame to which the jig support is fixed, thereby positioning the jig on the outer surface of the battery cells; a fourth step of operating a blower means to circulate air; and a fifth step of charging or discharging the battery cells in a predetermined cycle using a charging / discharging means, wherein the jig can be configured to reduce temperature deviation between the battery cells.

[0029] In the fifth step, the charge or discharge of the charge / discharge means is controlled by a charge / discharge control unit, one or more data of the voltage, resistance, temperature, charge / discharge cycle, and capacity of the battery cell is collected by a data measurement unit, and the data is output or displayed externally by a data display unit.

[0030] Furthermore, the present invention can also be provided in the form of various combinations of means for solving the above problems. [Effects of the Invention]

[0031] As described above, the charging / discharging device according to the present invention performs charging / discharging without temperature deviation between cylindrical battery cells due to the heat insulating effect, and therefore can accurately measure the temperature of the cylindrical battery cells.

[0032] Furthermore, by quickly and accurately determining the state of the cylindrical battery cells, a battery cell assembly with improved safety can be provided. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a conceptual diagram of a state in which the battery cell and the jig of the charging / discharging device according to the present invention are separated. [Figure 2] 10 is a conceptual diagram of a state in which a jig is rotated and positioned to be coupled to a battery cell of a charging / discharging device according to the present invention; [Figure 3] 10 is a conceptual diagram of a state in which a jig has moved and coupled to a battery cell of the charging / discharging device according to the present invention. FIG. [Figure 4] 10 is a graph showing the end temperature of a rest period after discharge at different charge / discharge positions in a chamber before and after application of a jig according to the present invention in Comparative Examples and Examples. [Figure 5] 10 is a table showing the end temperatures of the rest period after discharge at different charge / discharge positions in the chamber before and after application of the jig according to the present invention in Comparative Examples and Examples. [Figure 6] 1 is a graph showing the change in capacity due to charging cycles before and after application of the jig according to the present invention in Comparative Examples and Examples. [Figure 7] 1 is a table showing the change in capacity due to charging cycles before and after application of the jig according to the present invention in Comparative Examples and Examples. [Figure 8] 1 is a perspective view of a charging / discharging device according to the present invention with a battery cell and a jig separated from each other; [Figure 9] 1 is a perspective view of a state in which a battery cell and a jig of a charging / discharging device according to the present invention are coupled together; DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, with reference to the accompanying drawings, a detailed description will be given of an embodiment of the present invention that will enable a person skilled in the art to easily carry out the present invention. However, in describing the operation principle of the preferred embodiment of the present invention in detail, detailed description of related well-known functions or configurations will be omitted if it is determined that such detailed description may unnecessarily obscure the gist of the present invention.

[0035] Furthermore, the same reference numerals are used throughout the drawings for parts that have similar functions and actions. Throughout the specification, when a part is said to be connected to another part, this includes not only a direct connection but also an indirect connection via another element between them. Furthermore, unless otherwise specified, "including a certain element" does not mean that other elements are excluded, but that other elements may also be included.

[0036] Furthermore, descriptions that limit or add specific elements are applicable to all inventions and are not limited to a particular invention unless otherwise specified.

[0037] Furthermore, throughout the description of the present invention and the claims, the singular includes the plural unless otherwise stated.

[0038] Furthermore, throughout the description of the present invention and the claims, unless otherwise stated, "or" includes "and." Thus, "including A or B" means the three cases of including A, including B, or including both A and B.

[0039] The invention will now be explained with reference to the drawings and in conjunction with detailed embodiments.

[0040] FIG. 1 is a conceptual diagram of a charging / discharging device according to the present invention in a state where the battery cell and the jig are separated.

[0041] The charging / discharging device according to the present invention may include a chamber, a main frame on which a plurality of cylindrical battery cells formed in the chamber are mounted, a charging / discharging means formed in the main frame for charging or discharging the battery cells, a jig that is placed on or removed from the outer surface of the battery cells to reduce temperature deviation between the battery cells, a transport means for transporting the jig, and a blower means for circulating air within the chamber.

[0042] The chamber is a space that houses the main components of a charging / discharging device for charging / discharging cylindrical battery cells. The temperature within the chamber must be uniform. If this temperature uniformity is not maintained and there are hot spots in specific areas, errors may occur in the sensing data of the charging / discharging device.

[0043] The main frame is a frame on which cylindrical battery cells for charging and discharging are mounted. The operation of other components is performed according to the position of the battery cells on the main frame to install and remove the battery cells, perform charging and discharging using a charging and discharging device after installation, and add thermal insulation to the battery cells using a jig before charging and discharging.

[0044] It goes without saying that the charging / discharging means is not limited to any particular form as long as it can charge and discharge the battery cells.

[0045] A battery cell case may be connected to the main frame formed in a plate shape with a predetermined area and house the cylindrical battery cells therein.

[0046] There may be a battery cell energization unit that presses the upper side of the cylindrical battery cell so that the cylindrical battery cell accommodated in the battery cell case is fixed, thereby allowing the cylindrical battery cell to be electrically connected to an external power source.

[0047] The battery pack may include a lifting unit connected to the main frame, which lowers the battery cell current-carrying unit toward the cylindrical battery cells so that the cylindrical battery cells are pressed by the battery cell current-carrying unit, or which lifts the battery cell current-carrying unit from the cylindrical battery cells so that the pressure on the cylindrical battery cells by the battery cell current-carrying unit is released.

[0048] With the cylindrical battery cell housed in the battery cell case, the battery cell current-carrying unit is lowered by the lifting unit to simultaneously press the positive terminal, which can be placed on the upper side of the cylindrical battery cell, and the negative terminal, which can be placed on either the upper or lower side of the cylindrical battery cell; with the negative terminal and the positive terminal of the cylindrical battery cell simultaneously pressed by the battery cell current-carrying unit, the external power source is applied to the battery cell current-carrying member, and current is passed between the external power source and the cylindrical battery cell via the battery cell current-carrying unit, thereby enabling charging and discharging of the cylindrical battery cell.

[0049] Here, in order to further improve the heat insulation effect of the battery cells, charging and discharging can be performed with the jig surrounding the battery cells.

[0050] The battery cell current-carrying unit may include a negative terminal current-carrying unit that can energize the negative terminal of the cylindrical battery cell and the negative electrode of the external power source by pressing an upper edge or a bottom of the cylindrical battery cell on which the negative terminal of the cylindrical battery cell is formed.

[0051] The cylindrical battery cell may include a positive terminal current-carrying unit that can energize the positive terminal of the cylindrical battery cell and the positive electrode of the external power source by pressing an upper center portion of the cylindrical battery cell where the positive terminal of the cylindrical battery cell is formed.

[0052] When the negative electrode terminal current-carrying unit contacts the top of the cylindrical battery cell, an insulating unit may be disposed between the negative electrode terminal current-carrying unit and the positive electrode terminal current-carrying unit.

[0053] An elastic body may be formed at a predetermined position of the insulating unit, the negative electrode terminal current-carrying unit, or the positive electrode terminal current-carrying unit to provide elastic force between the insulating unit, the negative electrode terminal current-carrying unit, or the positive electrode terminal current-carrying unit and the battery cell.

[0054] The elastic body may be in the form of a spring.

[0055] The power supply may further include a negative electrode voltage sensor that can sense the negative electrode voltage when the negative electrode terminal current-carrying unit or the positive electrode terminal current-carrying unit is in contact with the negative electrode terminal and the positive electrode terminal, respectively, to conduct electricity, and a positive electrode voltage sensor that can sense the positive electrode voltage.

[0056] Furthermore, the battery pack may include a temperature sensor at a predetermined position of the battery cell, capable of sensing the temperature of the battery cell during charging and discharging.

[0057] The negative electrode terminal current-carrying unit or the positive electrode terminal current-carrying unit is not limited to a specific shape as long as it can contact the terminal of the battery cell. Preferably, the negative electrode terminal current-carrying unit or the positive electrode terminal current-carrying unit may have a terminal contact surface on which a plurality of protrusions are formed.

[0058] For temperature uniformity of the cylindrical battery cells, the battery cells may be rotated or periodically repositioned during charging and discharging.

[0059] A battery cell rotation unit may be included for rotating and periodically repositioning the battery cells.

[0060] The lifting unit may include an external force applying body to which an external force is applied, and an elevating body connected between the external force applying body and the positive electrode terminal current-carrying unit, the elevating body receiving the external force applied to the external force applying body and lifting the positive electrode terminal current-carrying unit.

[0061] When an external force is applied to the external force applicator and the lifting body descends initially while the cylindrical battery cells are housed in the battery cell case, the positive electrode terminal current-carrying unit connected to the lifting body descends together with the insulating part and the negative electrode terminal current-carrying unit, so that the upper edges of the cylindrical battery cells come into contact with the alignment tilting body.

[0062] When an external force is further applied to the external force applicator with the upper edge of the cylindrical battery cell in contact with the alignment tilter, the lifting body descends a second time, and the insulating part and the positive terminal current-carrying unit can further descend relatively.

[0063] When the negative terminal current-carrying unit rises while pressing the negative terminal formed on the upper edge of the cylindrical battery cell, a restoring force is accumulated in the elastic body on the negative terminal current-carrying unit side, and the positive terminal pressing body can press the positive terminal of the cylindrical battery cell.

[0064] Therefore, the negative terminal current-carrying unit and the positive terminal current-carrying unit can simultaneously press the negative terminal and the positive terminal of the cylindrical battery cell.

[0065] With the negative terminal current-carrying unit and the positive terminal current-carrying unit simultaneously pressing the negative terminal and the positive terminal of the cylindrical battery cell, the negative terminal current-carrying unit and the positive terminal current-carrying unit conduct electricity to the negative electrode of the external power source and the positive electrode of the external power source, thereby enabling the cylindrical battery cell to be charged and discharged.

[0066] The battery cells may be coupled to the upper and lower charging / discharging portions of the charging / discharging means and mounted on the main frame.

[0067] FIG. 2 is a conceptual diagram of a state in which a jig is rotated and positioned to be coupled to a battery cell of a charging / discharging device according to the present invention.

[0068] FIG. 3 is a conceptual diagram of the state in which the jig has moved and coupled to the battery cell of the charging / discharging device according to the present invention.

[0069] The transfer means can simultaneously transfer a plurality of jigs to place or remove the plurality of cylindrical battery cells at a predetermined position on the outer surface of the plurality of cylindrical battery cells.

[0070] The transport means may include a jig support that supports the jig, and a sub-frame to which a plurality of the jig supports are fixed.

[0071] The transporting means may include a rotating section that rotates the jig support and a moving section that moves the sub-frame.

[0072] One or more of the air blowing means may be provided on one or more sides of the chamber.

[0073] The blowing means may be a fan capable of circulating air.

[0074] The jig may have a structure for accommodating the battery cell.

[0075] The shape of the jig may be circular, rectangular, or hemispherical, but is not limited to these shapes as long as it can accommodate the battery cells and provide a heat insulating effect.

[0076] The jig may be formed in the same shape as the outer shape of the battery cell, and may expose 5% to 60% of the outer area of the battery cell.

[0077] The jig may be made of insulating material.

[0078] The jig may be easily molded, temperature resistant, chemical resistant, and electrically insulating.

[0079] The jig may be made of plastic, preferably a thermosetting resin, and more preferably a Bakelite material.

[0080] The present invention will be described below with reference to examples, but these are for easier understanding of the present invention and are not intended to limit the scope of the present invention.

[0081] Example 1 The cylindrical battery cells with the jig applied were charged and discharged in a channel equipped with five charge / discharge means. After the discharge was completed, there was a rest period of 45 minutes, and then the rest end temperature of each battery cell was measured.

[0082] The charging conditions were 3.6C, 2.4C, 1.2C, 0.6C and 4.225V, and the discharging conditions were 2.5C and 2.5V.

[0083] The triangular graph of chamber 1 in Figure 4 shows that the jig was applied, and it can be seen that the temperature deviation is small.

[0084] Figure 5 shows the end-of-rest temperature after discharge of each channel as the number of cycles increases for a battery cell with a thermal insulation environment created by applying a jig. It can be seen that there is no significant difference in the temperature value of the battery cell for each channel due to the cycles.

[0085] <Comparative Example 1> An experiment was carried out under the same conditions as in Example 1, except that the jig was not applied to the cylindrical battery cell.

[0086] 4, it can be seen that the temperature deviation of the battery cells is relatively large compared to Example 1.

[0087] Figure 5 shows the end-of-rest temperature after discharge of each channel as the number of cycles increases for a battery cell without a fixture and without an insulating environment. It can be seen that there is a significant difference in the temperature values of the battery cell for each channel as the number of cycles increases compared to Example 1. In particular, it can be seen that a relatively low end-of-rest temperature appears as the number of cycles increases for Channel 1.

[0088] <Example 2> The cylindrical battery cell with the jig applied was charged and discharged in a channel equipped with a charging and discharging means. The insulated cylindrical battery cell was charged and discharged for 128 cycles, and the capacity change of the battery cell was measured.

[0089] The charging conditions were 1.5C and 4.2V, and the discharging conditions were 2.5C and 2.5V.

[0090] In Figure 6, it can be seen that the capacity of the battery cell with the conical jig reflected on it did not decrease significantly within 128 cycles.

[0091] It can be seen from FIG. 7 that the battery cell of Example 2 in which the heat insulating environment was formed maintained 77.8% of its capacity even after 128 cycles.

[0092] <Comparative Example 2> Except for not using the jig, the cylindrical battery cell was charged and discharged in a channel equipped with a charge / discharge means under the same conditions as in Example 2. The insulated cylindrical battery cell was charged and discharged up to 200 cycles, and the capacity change of the battery cell was measured.

[0093] In Figure 6, we can see that the capacity of the battery cells that were not exposed to the conical jig decreased significantly from 100 out of 200 cycles.

[0094] In FIG. 7, it can be seen that battery cell 1 of Comparative Example 2, in which an insulating environment was not formed, maintained 41.4% of its capacity after 200 cycles, and battery cell 2 maintained 43.3% of its capacity after 200 cycles.

[0095] Those skilled in the art will be able to make various applications and modifications within the scope of the present invention based on the above content. [Explanation of symbols]

[0096] 100 Charging and discharging equipment 110 Chamber 120 Mainframe 130 Charging and discharging means 131 Upper charging / discharging section 132 Lower charge / discharge section 140 Jig 150 Means of transport 151 Jig Support 152 subframe 153 Rotating part 154 Mobile Unit 160 Ventilation means 170 battery cells

Claims

1. A chamber; a main frame on which a plurality of cylindrical battery cells formed in the chamber are mounted; a charging / discharging means for charging or discharging the battery cells formed on the main frame; a jig that is placed on or removed from the outer surface of the battery cell to reduce temperature deviation between the battery cells; a transport means for transporting the jig; and a blower for circulating air within the chamber.

2. 2. The charging / discharging device according to claim 1, wherein the battery cells are coupled to the upper and lower charging / discharging portions of the charging / discharging means and mounted on the main frame.

3. The charging / discharging device according to claim 1 , wherein the transfer means simultaneously transfers a plurality of jigs to place or remove them at fixed positions on the outer surfaces of the plurality of cylindrical battery cells.

4. The transfer means is a jig support for supporting the jig; The charging / discharging device according to claim 3 , further comprising: a subframe to which the plurality of jig supports are fixed.

5. The transfer means is a rotating unit that rotates the jig support; The charging / discharging device according to claim 4 , further comprising: a moving unit that moves the subframe.

6. The charging / discharging device according to claim 1 , wherein one or more of the air blowing means are provided on one or more surfaces of the chamber.

7. The charging / discharging device according to claim 1 , wherein the jig has a structure for accommodating the battery cell.

8. The charging / discharging device of claim 7 , wherein the jig is formed in the same shape as the outer shape of the battery cell, and exposes 5% to 60% of the outer area of the battery cell.

9. The charging / discharging device according to claim 1 , wherein the jig is made of a heat insulating material.

10. a charge / discharge control unit that controls charging or discharging of the charge / discharge means; a data measurement unit that collects data on one or more of the voltage, resistance, temperature, charge / discharge cycle, and capacity of the battery cell; The charging / discharging device according to claim 1 , further comprising: a data display unit that outputs or displays the data to an external device.

11. a first step of mounting a plurality of cylindrical battery cells on a main frame within a chamber; a second step of rotating the jig fixed to the jig support to position the jig at the same distance from the battery cell; a third step of disposing the jig on the outer surface of the battery cell by moving the subframe to which the jig support is fixed using a transport means; a fourth step of operating the blowing means to circulate air; a fifth step of charging or discharging the battery cells in a predetermined cycle by a charging / discharging means; The jig is formed to reduce temperature deviation between the battery cells.

12. The fifth stage is a charge / discharge control unit controls charging or discharging of the charge / discharge means; a data measurement unit for collecting data on one or more of the voltage, resistance, temperature, charge / discharge cycle, and capacity of the battery cell; The charging / discharging method using the cylindrical battery cell charging / discharging device according to claim 11 , wherein the data is output or displayed externally by a data display unit.

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