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 to Korean Patent Application No. 10-2022-0106043 filed on August 24, 2022, and all contents disclosed in the Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a charge / discharge device and a charge / discharge method thereof for maintaining an insulated environment without temperature deviation between battery cells in a chamber, and more particularly, to a charge / discharge device that applies a charge / discharge current in a chamber that maintains a constant temperature by air circulation, and solves the temperature deviation caused by the difference in cooling levels of battery cells in the chamber, and in the case of a high-power battery cell under high-rate discharge conditions that generate a lot of heat, the charge / discharge device and a charge / discharge method thereof for maintaining an insulated environment without temperature deviation between battery cells in a chamber, the charge / discharge device including a cylindrical insulation function for preventing temperature deviation caused by direct air circulation for practical performance analysis. [Background technology]

[0003] 2. Description of the Related Art As the safety and capacity of rechargeable lithium secondary batteries are improved and increased rapidly, the types of devices that use the lithium secondary batteries as their energy source are increasing.

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

[0005] For example, the lithium secondary batteries are not only widely used as energy sources for wireless mobile devices or wearable devices, which are multi-functional small products, but are also used as medium- to large-sized battery packs for use as energy sources or energy storage systems (ESS) for electric vehicles and hybrid electric vehicles, which are presented as alternatives to existing gasoline and diesel vehicles that cause air pollution.

[0006] The lithium secondary batteries are classified according to the shape of the battery case into cylindrical and prismatic secondary batteries in which an electrode assembly is built into a cylindrical or prismatic metal case, and pouch-type secondary batteries in which an electrode assembly is built into a pouch-type case made of an aluminum laminate sheet. Among these, cylindrical secondary batteries have the advantages of being relatively large in capacity and structurally safe.

[0007] An electrode assembly used in a cylindrical secondary battery is wound up in a substantially cylindrical shape so that it can be appropriately accommodated in a cylindrical can. To explain this in more detail, the cylindrical electrode assembly is formed by stacking a positive electrode, a separator, and a negative electrode and winding them up many times in a substantially cylindrical shape. Here, the positive electrode is formed by coating a positive electrode plate with a positive electrode active material (e.g., a layered compound containing lithium), the separator is made of porous polyethylene (PE) or polypropylene (PP) to allow the movement of lithium ions, and the negative electrode is formed by coating a negative electrode plate with a negative electrode active material (e.g., a carbon-based material). In addition, the positive electrode plate is connected to a positive electrode tab, and the negative electrode plate is connected to a negative electrode tab, and the positive electrode plate extends 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 above-mentioned advantages.

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

[0010] Overheating of a battery cell can shorten its 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 the battery cell is an important issue.

[0011] In such a charge / discharge 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 using 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 condition, temperature measurement is required using a charge / discharge device that can provide a heat insulating function on the outer casing of the battery cell.

[0013] Japanese Patent No. 3057556 discloses a method for charging and discharging a secondary battery, which comprises inserting and holding a secondary battery in a battery holding hole of a pallet having a plurality of bottomed battery holding holes with insertion holes for power terminals formed at the bottom, connecting power terminals to the lower end face and positive terminal of the secondary battery, pushing up the secondary battery inserted and held in the battery holding hole from below with a power terminal for charging and discharging so that the secondary battery protrudes from the upper face of the battery holding hole to the surface, holding the secondary battery in a state in which the surface of the secondary battery is exposed, and charging and discharging the secondary battery while blowing air on the exposed surface. However, no technology for a charging and discharging device that can solve the temperature deviation of a plurality of cylindrical batteries has been identified.

[0014] In Chinese Utility Model No. 207441892, a battery tray includes a clip assembly consisting of a base using a cooling material and a pair of clips, and one side of the clip assembly is provided with a semicircular groove. The two clips arranged facing each other form a cylindrical clip groove for positioning the battery, 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. A charging / discharging device is disclosed in which a battery pallet is arranged on the cold end surface of a cooling plate. However, no technology for a charging / discharging device that can solve the temperature deviation of multiple cylindrical batteries is identified.

[0015] Korean Patent Publication No. 10-2387606 discloses a cylindrical battery cell charging / discharging jig for charging / discharging at least one cylindrical battery cell in order to test the at least one cylindrical battery cell, the jig including a body member and a cylindrical battery cell charging / discharging jig including a panel member, a battery cell receiving member, a battery cell current unit, and a lifting unit. However, no technology for a charging / discharging device that can solve the temperature deviation of 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 a 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, and is intended to solve the temperature deviation caused by the difference in cooling levels of battery cells in a chamber in a charging and discharging device that applies a charging and discharging current in 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 actual performance analysis does not suggest a charging and discharging device configuration that maintains an insulated environment where no temperature deviation occurs between battery cells in a chamber, including a cylindrical insulation function to prevent temperature deviation due to direct air circulation. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] Patent No. 3057556 [Patent Document 2] China Utility Model No. 207441892 [Patent Document 3] Korean Patent 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 chamber in a charge / discharge device that applies a charge / discharge current in a chamber that maintains a constant temperature through air circulation. In the case of a high-power battery cell under high-rate discharge conditions that generates a lot of heat, the present invention aims to provide a charge / discharge device and a charge / discharge method thereof that maintains an insulated environment in which no temperature deviation occurs between battery cells in a chamber, including a cylindrical insulation function to prevent temperature deviation due to direct air circulation, for actual performance analysis. [Means for solving the problem]

[0019] To achieve this object, a 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 for charging or discharging the battery cells formed in the main frame, 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 an upper charging / discharging portion and a lower charging / discharging portion of the charging / discharging means and mounted on the main frame.

[0021] The transfer means can transfer a plurality of jigs simultaneously to place or remove them at fixed 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 subframe to which a plurality of the jig supports are fixed.

[0023] The transport 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 blowing means may be provided on one or more sides of the chamber.

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

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

[0027] The jig may be of insulating material.

[0028] To achieve the above object, a charging / discharging method of 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 subframe to which the jig support is fixed to position the jig on an outer surface of the battery cells; a fourth step of operating a blowing 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 formed to reduce a temperature deviation between the battery cells.

[0029] The fifth step may include controlling charging or discharging of the charging / discharging means by a charging / discharging control unit, collecting data on one or more of the voltage, resistance, temperature, charge / discharge cycle, and capacity of the battery cell by a data measurement unit, and outputting or displaying the data to the outside by a data display unit.

[0030] Moreover, the present invention can also be provided in the form of a combination of various means for solving the above problems. Effect of the Invention

[0031] As described above, the charge / discharge device according to the present invention performs charge / discharge 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] Also, a battery cell assembly with improved safety can be provided by quickly and accurately determining the state of the cylindrical battery cells. [Brief description of the drawings]

[0033] [Figure 1] 4 is a conceptual diagram of a state in which a battery cell and a jig of the charging / discharging device according to the present invention are separated. FIG. [Diagram 2] 1 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; [Diagram 3] 13 is a conceptual diagram of a state in which a jig has been moved and coupled to a battery cell of the charging / discharging device according to the present invention. FIG. [Figure 4] 1 is a graph showing the end temperature of a rest period after discharge according to charge / discharge positions in a chamber before and after application of a jig according to the present invention in Comparative Example and Example. [Diagram 5] 1 is a table showing the end temperatures 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 6] 1 is a graph showing a change in capacity due to charging cycles before and after application of the jig according to the present invention in a comparative example and an example. [Figure 7] 1 is a table showing capacity changes due to charging cycles before and after application of the jig according to the present invention in comparative examples and examples. [Figure 8] 2 is a perspective view of a state in which a battery cell and a jig of the charging / discharging device according to the present invention are separated. FIG. [Figure 9] 4 is a perspective view of a state in which a battery cell and a jig of the charging / discharging device according to the present invention are coupled together; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, in which a person having ordinary skill in the art to which the present invention pertains can 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] In addition, the same reference numerals are used throughout the drawings for parts having similar functions and actions. Throughout the specification, when a part is said to be connected to another part, this includes not only the case where the part is directly connected to another part, but also the case where the part is indirectly connected via another element between the two parts. In addition, when a part includes a certain component, it does not mean that the other component is excluded, but that the part may further include the other component, unless otherwise specified.

[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] In addition, 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 a battery cell and a 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 for charging or discharging the battery cells formed in the main frame, a jig that is placed on or removed from an outer surface of the battery cells to reduce a 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 in the space within the chamber must be uniform. If there is no uniformity in the temperature and there is a hot spot in a specific area, an error 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 in order to mount and remove the battery cells, perform charging and discharging using a charging and discharging means after mounting, and add a heat insulating effect to the battery cells using a jig before charging and discharging the battery cells.

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

[0045] There may be a battery cell case connected to the main frame formed in a plate shape having a predetermined area and housing the cylindrical battery cell therein.

[0046] There may be a battery cell current-carrying unit that presses an upper portion of the cylindrical battery cell so that the cylindrical battery cell housed in the battery cell case is fixed, thereby causing the cylindrical battery cell to be electrically connected to an external power source.

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

[0048] With the cylindrical battery cell accommodated 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 part of the cylindrical battery cell, and the negative terminal, which can be placed on either the upper or lower part, and with the negative terminal and 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, thereby causing current to flow 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 cell, charging and discharging can be performed with the jig surrounding the battery cell.

[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 while 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 while 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 an upper portion of the cylindrical battery cell, the battery may include an insulating unit 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 an 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 capable of detecting the negative electrode voltage when the negative electrode terminal current-passing unit or the positive electrode terminal current-passing unit is in contact with the negative electrode terminal and the positive electrode terminal, respectively, to pass current therethrough.

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

[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 has a terminal contact surface on which a plurality of protrusions are formed.

[0058] For temperature uniformity in 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 changing the position of the battery cells.

[0060] The lifting unit may include an external force application body to which an external force is applied, and a lifting body connected between the external force application body and the positive electrode terminal current-carrying unit and configured to receive the external force applied to the external force application body and lift the positive electrode terminal current-carrying unit.

[0061] When an external force is applied to the external force applicator with the cylindrical battery cells housed in the battery cell case and the lifting body is initially lowered, the positive terminal current-carrying unit connected to the lifting body is lowered together with the insulating part and the negative terminal current-carrying unit, so that the upper edges of the cylindrical battery cells come into contact with the alignment inclined 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 tilt body, the lifting body is lowered a second time, and the insulating part and the positive terminal current-carrying unit can be further lowered relative to each other.

[0063] As 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 is able to 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 charging and discharging the cylindrical battery cell.

[0066] The battery cells may be coupled to an upper charging / discharging portion and a lower charging / discharging portion 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 a state in which the jig has been moved and coupled to the battery cell of the charge / discharge device according to the present invention.

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

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

[0071] The transport 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 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 receiving the battery cell.

[0075] The shape of the jig may be circular, rectangular, or hemispherical, but is not limited thereto 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 5% to 60% of the outer area of ​​the battery cell may be exposed.

[0077] The jig may be of insulating material.

[0078] The jig may have ease of moldability, temperature resistance, chemical resistance and electrical insulation properties.

[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, which are provided 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 to which the jig was applied were charged and discharged in a channel equipped with five charge / discharge means. After the discharge was completed, a rest period of 45 minutes was allowed, 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 the temperature deviation is small.

[0084] Figure 5 shows the end-of-life temperature after discharge of each channel according to the increase in cycles of the battery cell in which the jig is applied to create an insulating environment. It can be seen that there is no significant difference in the temperature value of the battery cell for each channel according 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] 5 shows the end-of-rest temperature after discharge of each channel as the number of cycles increases for a battery cell in which no jig is applied and there is no thermal insulation environment. It can be seen that there is a large difference in the temperature value of the battery cell of each channel as the number of cycles increases compared to Example 1. In particular, it can be seen that in the case of channel 1, a relatively low end-of-rest temperature appears as the number of cycles increases.

[0088] <Example 2> The cylindrical battery cell to which the jig was applied was charged and discharged in a channel equipped with a charging and discharging means. The insulated cylindrical battery cell was charged and discharged up to 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 cone-shaped jig reflected thereon does not decrease significantly within 128 cycles.

[0091] It can be seen from FIG. 7 that the battery cell of Example 2 in which the thermal insulation 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, it can be seen that the capacity of the battery cells that were not exposed to the cone-shaped jig is significantly reduced 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 appreciate that various applications and modifications within the scope of the present invention will be possible 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 Division 160 Air Blowing 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 or removed from an outer surface of the battery cell to reduce a temperature difference between the battery cells; A transport means for transporting the jig; and a blower means for circulating air within the chamber.

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

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

4. The transport 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 transport 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 according to claim 7 , wherein the jig is formed in the same shape as an outer shape of the battery cell and exposes 5% to 60% of an outer area of ​​the battery cell.

9. The charging and 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 at least one of a voltage, a resistance, a temperature, a charge / discharge cycle, and a 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 outside source.

11. 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 a uniform distance from the battery cells; a third step of disposing the jig on an outer surface of the battery cell by moving a subframe to which the jig support is fixed by a transport means; A fourth step of operating the blowing means to circulate air; and a fifth step of charging or discharging the battery cell in a predetermined cycle by a charging / discharging means; The jig is formed to reduce a temperature deviation between the battery cells.

12. The fifth stage comprises: A charge / discharge control unit controls charging or discharging of the charge / discharge means; a data measuring unit for collecting at least one of data on 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 , further comprising outputting or displaying the data to the outside by a data display unit.

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