Charging / discharging device for secondary battery

Abstract

A charging / discharging device for a secondary battery, related to one embodiment of the present invention, comprises: a chamber including one or more charging spaces in which trays that store secondary batteries can be individually accommodated, and having a charging gripper electrically connected to the secondary battery in the charging space; a thermoelectric cooling unit which includes a thermoelectric element and a cooling fin that transfers, into the vicinity thereof, cold air of a cooling side of the thermoelectric element, and which cools the air in the charging space at the upper part of the charging space; a first fan which suctions the cooling air in the vicinity of the thermoelectric cooling unit at the upper part of the charging space and which blows the cooling air toward the secondary battery accommodated in the tray; and a second fan, which suctions the air in parallel to the longitudinal direction of the secondary battery at the lower part of the charging space so that the cooling air flows in the longitudinal direction of the secondary battery.

Description

Secondary battery charging and discharging device

[0001] The present invention relates to a charging / discharging device for a secondary battery, and more particularly, to a charging / discharging device for a secondary battery capable of eliminating temperature differences among a plurality of secondary batteries being charged / discharged in one tray.

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0054667, filed April 24, 2024, the entire contents of which are incorporated herein by reference.

[0003] As demand for mobile devices increases and the spread of electric vehicles and other devices expands, the demand for secondary batteries as an energy source is rapidly increasing, and among them, the demand for lithium secondary batteries with high capacity and energy density is high.

[0004] In general, lithium secondary batteries are manufactured by placing an electrode assembly consisting of a negative electrode, a positive electrode, and a separator in a cylindrical or square metal can or a pouch-shaped case made of aluminum laminate sheet, and injecting an electrolyte into the electrode assembly.

[0005] Figure 1 is a drawing for explaining a pouch-type secondary battery.

[0006] Referring to Fig. 1, a pouch-type secondary battery (1) includes a pouch-type case (2) having a gas pocket, an electrode assembly (3) housed in the pouch-type case (2), a first electrode lead (5) and a second electrode lead (6) connected to the electrode assembly (3) and protruding from both sides of the pouch-type case (2). The electrode assembly (3) is formed by sequentially stacking a negative electrode and a positive electrode with a separator as a medium.

[0007] The first electrode lead (5) connects the positive poles of the electrode assembly (3) into one. The second electrode lead (6) connects the negative poles of the electrode assembly (3) into one.

[0008] Lithium secondary batteries manufactured in this manner must undergo a prescribed cycle of charging and discharging to activate them before they can function as batteries. This process is called the formation process or activation process.

[0009] A charging / discharging device (90) is used in this activation process. The charging / discharging device (90) can simultaneously charge / discharge multiple secondary batteries (1) to increase productivity in the mass production process of secondary batteries.

[0010] Figures 2 and 3 are drawings for explaining the flow of wind when a blower fan is operated in a conventional secondary battery charging / discharging device. Figure 2 is a schematic perspective view of a chamber having a tray containing a plurality of secondary batteries (1) and a charging space, and Figure 3 is a schematic plan view of a charging space into which a tray is inserted.

[0011] Referring to Fig. 2, the charging / discharging device (90) is installed in an activation room (R). The activation device includes a chamber (10) having a plurality of charging spaces (11), a plurality of blower fans (60, 70) installed in each charging space (11), and a pair of charging grippers (31, 32) installed in each charging space (11).

[0012] The chamber (10) is provided so that the charging space (11) is opened to the activation room (R). The chamber (10) is provided so that each charging space (11) can accommodate one tray (20). A plurality of secondary batteries (1) are stored in one tray (20).

[0013] The above-described plurality of secondary batteries (1) are stored in the above-described single tray (20) and charged in the above-described charging space (11). When the secondary battery (1) is charged and discharged, an electrochemical reaction occurs, and heat (Q) is generated during this process. The heat is a factor that directly affects the performance of the secondary battery (1).

[0014] The heat (Q) generated during charging and discharging of the secondary battery (1) is dissipated to the gap space (G) surrounding the secondary battery (1). The gap space (G) is the space between two adjacent secondary batteries (1). The gap space (G) is provided between each two secondary batteries (1) along the arrangement direction of the secondary batteries (1).

[0015] Referring to Fig. 3, the heat of the secondary battery (1) is concentrated and dissipated into the gap space (G). The heat (Q) generated during charging and discharging of the plurality of secondary batteries (1) is dispersed through a plurality of blower fans (60, 70) installed in the charging space (11). The blower fans (60, 70) blow the air of the charging space (11).

[0016] When the temperature of the charging space (11) rises due to the heat (Q) generated during charging and discharging of the secondary battery (1), the temperature of the wind from the blower fan (60, 70) also rises. When the temperature of the charging space (11) rises due to the heat (Q) generated during charging of the secondary battery (1), the temperature of the wind from the blower fan (60, 70) also rises, which may lower the heat exchange efficiency with the secondary battery (1).

[0017] In a conventional activator, a plurality of blower fans (60, 70) blow wind toward the upper portion of the tray (20) and the rear portion of the tray (20). In the conventional activator, the wind of the blower fans (60, 70) mainly flows toward the outer portion of the tray (20) and has difficulty flowing into the gap space (G) in the center portion of the tray (20). The gap space (G) is a space provided between two secondary batteries (1) along the arrangement direction (W) of the secondary batteries (1).

[0018] The wind of the above blower fan (60, 70) has difficulty flowing to the center of the tray (20), so when charging the secondary battery (1), a temperature difference occurs between the secondary battery (1) stored in the outer part of the tray (20) and the secondary battery (1) stored in the center of the tray (20).

[0019] Conventional activating devices operate in a state where they cannot fundamentally remove the heat (Q) generated from the secondary battery (1) during the charging and discharging process, making it difficult to control the temperature when charging the secondary battery (1).

[0020] In addition, after repeating aging, charging, and discharging, the capacity of the secondary battery (1) is checked, and the low voltage of the secondary battery (1) is selected through measuring the OCV (Open-Circuit Voltage) of the secondary battery (1). The low voltage selection of the secondary battery (1) is a process performed to check whether the secondary battery (1) maintains a normal voltage range when charging or discharging.

[0021] The temperature difference between multiple secondary batteries (1) that occurs during charging and discharging of the secondary battery (1) affects the capacity and OCV (Open-Circuit Voltage) of the secondary battery (1). If the secondary battery (1) is in a low voltage state, the secondary battery (1) does not operate properly or has a defect that causes a short lifespan. The low voltage secondary battery (1) has a risk of internal fire when overcharged or overdischarged.

[0022] The present invention has been devised to solve the above-mentioned problems, and the purpose of the present invention is to provide a secondary battery charging / discharging device capable of eliminating temperature differences between a plurality of secondary batteries by uniformly cooling the plurality of secondary batteries by flowing cooling air into the gap space of a tray in which a plurality of secondary batteries are stored.

[0023] Through one embodiment of the present invention, it is intended to provide a secondary battery charging / discharging device capable of easily generating cold air for cooling within a chamber where charging / discharging of a secondary battery is performed and controlling the temperature of the cold air.

[0024] Through one embodiment of the present invention, it is intended to provide a secondary battery charging / discharging device capable of performing effective cooling by supplying cold air in the longitudinal direction of a gap space formed between secondary batteries, i.e., in the longitudinal direction of the secondary battery.

[0025] Through one embodiment of the present invention, it is intended to provide a secondary battery charging / discharging device that can effectively supply cold air to a gap space between secondary batteries by forming a forced downward cold air flow toward one side of the secondary battery and forming a forced suction air flow at the other side of the secondary battery.

[0026] In order to achieve the purpose described above, the charging and discharging device of the secondary battery has the following configuration and structure.

[0027] In order to achieve the above-described object, a charging / discharging device for a secondary battery according to one embodiment of the present invention may include a chamber in which a tray in which a secondary battery is stored includes one or more individually accommodating charging spaces, and in which a charging gripper is mounted so as to be electrically connected to the secondary battery in each charging space, a thermoelectric cooling unit including a thermoelectric element and cooling fins provided to transfer cold air from a cooling side of the thermoelectric element to the surroundings and provided to cool air in the charging space at an upper portion of the tray, and a first fan provided to suck in cooling air from the surroundings of the thermoelectric cooling unit and blow the cooling air to the secondary battery stored in the tray and a gap space surrounding the secondary battery.

[0028] In addition, according to one embodiment of the present invention, a charging and discharging device for a secondary battery may be provided, including a chamber in which a tray for storing a secondary battery includes one or more individually accommodating charging spaces, a charging gripper provided in the charging space to be electrically connected to the secondary battery, a thermoelectric cooling unit provided at an upper portion of the charging space to cool air in the charging space, a first fan provided to suck in cooling air from the periphery of the thermoelectric cooling unit at an upper portion of the charging space and blow the cooling air toward the secondary battery stored in the tray, and a second fan provided to suck in air in a direction parallel to the longitudinal direction of the secondary battery at a lower portion of the charging space so that the cooling air flows along the longitudinal direction of the secondary battery.

[0029] In addition, according to one embodiment of the present invention, a charging and discharging device for a secondary battery may be provided, including a chamber in which a tray for storing a secondary battery includes at least one individually accommodating charging space, a charging gripper provided in the charging space so as to be electrically connected to the secondary battery, a thermoelectric cooling unit provided at an upper portion of one side of the charging space and configured to cool air in the charging space, a first fan provided to suck in cooling air from the vicinity of the thermoelectric cooling unit at an upper portion of one side of the charging space and blow the cooling air toward one side of the secondary battery stored in the tray, and a second fan provided to suck in air in a direction parallel to the longitudinal direction of the secondary battery at a lower portion of the other side of the charging space so that the cooling air flows along the longitudinal direction of the secondary battery.

[0030] Additionally, the first fan may be positioned above the first open side of the tray where the first electrode lead of the secondary battery is exposed. The first fan may be configured to exhaust the cooling air to the first open side of the tray. For example, the first fan may be configured to exhaust the cooling air to the first open side of the tray in a linear flow parallel to the arrangement direction of the secondary batteries.

[0031] Additionally, the first fan may include a first blade, a first intake port, and a first exhaust port formed in a slit shape on a side other than the first intake port. The first exhaust port may be formed in a slit shape parallel to the first blade. The first fan may cause the cooling air to traverse in a direction parallel to the arrangement direction when the first blade rotates and exhaust the cooling air to the first open side through the first exhaust port.

[0032] For example, the first fan may include a cross flow fan.

[0033] Additionally, the second fan may be arranged diagonally with the first fan along the length direction and height direction.

[0034] For example, the second fan may be configured to be fluidly movable through a gap space of the tray through a second open side of the tray where the second electrode lead of the secondary battery is exposed, and to suck the cooling air from the first open side to the second open side along the longitudinal direction of the secondary battery. In this document, the upper side of one side of the charging space may refer to the upper side of the first open side of the tray where the first electrode lead of the secondary battery is exposed, and the upper side of the other side of the charging space may refer to the upper side of the second open side of the tray where the second electrode lead of the secondary battery is exposed.

[0035] In addition, the thermoelectric cooling unit may be arranged at an upper portion of one side of the charging space, and a first fan may be provided to suck in cooling air around the thermoelectric cooling unit at an upper portion of one side of the charging space and blow the cooling air toward one side of the secondary battery stored in the tray, and the second fan may be provided to suck in air parallel to the longitudinal direction of the secondary battery at a lower portion of the other side of the charging space.

[0036] The second fan may be arranged to suck in the heat-exchanged cooling air in the gap space along the longitudinal direction and exhaust the heat-exchanged cooling air to the outside of the charging space in a direction different from the longitudinal direction.

[0037] In addition, the charging / discharging device of the secondary battery may include a fan hood that fluidly connects the second suction port of the second fan and the second open side of the tray. The fan hood may expand the suction force of the second fan to each gap space spaced apart in the arrangement direction of the secondary batteries. The fan hood may be arranged to guide the flow of heat-exchanged cooling air of each gap space to the second suction port.

[0038] The above fan hood may be spaced apart from the lower portion of the charging gripper that is electrically connected to the secondary battery.

[0039] Additionally, the charging / discharging device of the secondary battery may include a temperature sensor configured to detect the temperature of cooling air heat-exchanged with the secondary battery in the charging space.

[0040] Additionally, the charging / discharging device of the secondary battery may include a controller that controls the operation of the thermoelectric cooling unit and the first fan based on temperature information of the temperature sensor.

[0041] The above thermoelectric cooling unit may include a heat dissipation fin provided to transfer heat from the heating side of the thermoelectric element to the surroundings.

[0042] Additionally, the charging / discharging device of the secondary battery may include a third fan mounted in the chamber to suck in hot air around the heat dissipation fins of the thermoelectric cooling unit in the charging space and exhaust it to a chamber duct outside the charging space.

[0043] In addition, the charging / discharging device of the secondary battery includes an exhaust duct installed in a charging space at the top of the tray, and the thermoelectric cooling unit can be mounted on the exhaust duct such that the heat dissipation fins are exposed to the duct space of the exhaust duct and the cooling fins are exposed to the charging space from the outer surface of the exhaust duct.

[0044] The above heat dissipation fins may be arranged parallel to the flow direction of hot air in the duct space.

[0045] The above thermoelectric cooling unit may be arranged so that the arrangement direction of the heat dissipation fins and the arrangement direction of the cooling fins are orthogonal.

[0046] The above exhaust duct may include a chamber duct in which the duct space is partitioned from the charging space and a duct fan mounted in the chamber so as to be fluidly movable, and mounted at the outlet of the exhaust duct to exhaust hot air in the duct space to the chamber duct.

[0047] In addition, the charging / discharging device of the secondary battery may include a heat dissipation unit having heat dissipation fins and installed outside the charging space, and a heat pipe that connects the heat dissipation unit and the thermoelectric cooling unit and is arranged to transfer heat from the thermoelectric cooling unit to the heat dissipation unit.

[0048] The above cooling fins and the first fan may be provided within the charging space. In particular, they may be provided at an upper portion of one side of the charging space. In addition, the front of the chamber may be opened, through which a tray storing a secondary battery may be inserted and removed. In addition, external air may be cooled by being introduced between the first fan and the cooling fins through the upper portion of the front of the chamber by the air discharge pressure of the first fan.

[0049] The cooling temperature of the above cooling fins can be controlled by controlling the thermoelectric element. Consequently, the temperature of the cooling air can be controlled. Therefore, even without a separate refrigeration cycle, controllable cooling air can be generated and supplied within the charging space.

[0050] Meanwhile, multiple secondary batteries can be arranged in parallel on a tray. Accordingly, the gap spaces between the secondary batteries can also form multiple lanes. Cooling air needs to be evenly supplied and exhausted across the multiple lanes.

[0051] To this end, it is preferable that the first fan be a cross-flow fan for evenly supplying cool air to all inlets of the plurality of lanes. In addition, it is preferable that a duct be provided at the front end of the second fan for evenly drawing air from all outlets of the plurality of lanes.

[0052] Through the cooling fins of these thermoelectric elements and the positional characteristics of the first and second fans, a secondary battery charging / discharging device capable of providing compact, controllable, and effective cooling performance can be provided.

[0053] A charging / discharging device for a secondary battery having the configuration and structure described above has the following effects.

[0054] The charging / discharging device of the secondary battery can eliminate temperature differences between the secondary batteries depending on their locations in the tray when charging / discharging the secondary batteries by uniformly cooling the secondary batteries by flowing cooling air into the gap space of the tray in which the secondary batteries are stored.

[0055] In addition, the charging / discharging device of the secondary battery can eliminate temperature deviations of a plurality of secondary batteries that are charged / discharged under the same conditions, thereby achieving uniformity of performance and capacity of the plurality of secondary batteries, and can also improve the low-voltage selection capability of the secondary battery.

[0056] In addition, the charging / discharging device of the secondary battery can flow the cooling air into the gap space of the tray through two fans, i.e., a first fan and a second fan, thereby promoting compactness of the device.

[0057] In addition, the charging / discharging device of the secondary battery can save air conditioning costs for temperature control of the activation room by exhausting cooling air that has exchanged heat with the secondary battery in the charging space to the activation room to lower the temperature of the activation room.

[0058] In addition, the charging / discharging device of the secondary battery can improve the air conditioning efficiency within the charging space by discharging hot air that has absorbed heat generated in the process of cooling the air within the charging space through the chamber duct.

[0059] In addition, the charging / discharging device of the secondary battery can charge / discharge the plurality of secondary batteries under optimized conditions by adjusting the cooling temperature of the thermoelectric cooling unit to a preset temperature based on temperature information of the cooling air heat-exchanged in the charging space, thereby improving the capacity and performance of the secondary batteries.

[0060] Figure 1 is a drawing for explaining a pouch-type secondary battery.

[0061] FIG. 2 and FIG. 3 are drawings for explaining the flow of wind when a blower fan is operated in a conventional charging / discharging device for a secondary battery. FIG. 2 is a schematic perspective view of a charging / discharging device having a tray in which a plurality of secondary batteries are stored and a charging space, and FIG. 3 is a schematic plan view of a charging space in which a tray is inserted.

[0062] Figures 4 to 7 are drawings for explaining a charging and discharging device for a secondary battery according to the first embodiment of the present invention.

[0063] Figure 4 schematically illustrates a state in which a tray is stored in a chamber according to the first embodiment of the present invention.

[0064] Figure 5 schematically illustrates a plan view of a charging / discharging device for a secondary battery according to the first embodiment of the present invention.

[0065] Figure 6 schematically illustrates a side view of a charging / discharging device for a secondary battery according to the first embodiment of the present invention.

[0066] FIG. 7 is a drawing for explaining the arrangement of the first fan, the second fan, and the third fan and the flow of air for the tray according to the first embodiment of the present invention.

[0067] FIG. 8 and FIG. 9 are drawings for explaining a charging and discharging device for a secondary battery according to a second embodiment of the present invention.

[0068] Fig. 10 is a drawing for explaining a charging / discharging device for a secondary battery according to a third embodiment of the present invention.

[0069] FIG. 11 and FIG. 12 are drawings for explaining a charging / discharging device of a secondary battery according to the fourth embodiment of the present invention.

[0070] Hereinafter, with reference to the attached drawings, a charging / discharging device for a secondary battery according to one embodiment of the present invention will be described.

[0071] FIGS. 4 to 7 are drawings for explaining a charging / discharging device for a secondary battery according to a first embodiment of the present invention, wherein FIG. 4 schematically illustrates a state in which a tray is stored in a chamber, FIG. 5 schematically illustrates a plan view of a charging / discharging device for a secondary battery, FIG. 6 schematically illustrates a side view of a charging / discharging device for a secondary battery, and FIG. 7 is a drawing for explaining the arrangement of a first fan, a second fan, and a third fan and the flow of air for a tray according to the first embodiment of the present invention.

[0072] The charging / discharging device (100) of the secondary battery related to the first embodiment of the present invention includes one or more charging spaces (111, 112, 113, 114) in which a tray (120) for storing a secondary battery (1) can be individually accommodated, and includes a chamber (110) in which a charging gripper (191, 192) is mounted so as to be electrically connected to the secondary battery (1) in each charging space (111, 112, 113, 114). In addition, a tray (120, 120a, 120b, 120c) can be accommodated in each charging space (111, 112, 113, 114).

[0073] In addition, the charging / discharging device (100) of the secondary battery includes a thermoelectric element (141) and a cooling fin (147) provided to transfer cold air from the cooling side of the thermoelectric element (141) to the surroundings, and includes a thermoelectric cooling unit (240) provided to cool the air of the charging space (111) at the upper portion of the tray (120).

[0074] In addition, the secondary battery charging / discharging device (100) includes a first fan (150) that is arranged to suck in cooling air (CA) around the thermoelectric cooling unit (240) and blow the cooling air (CA) to the secondary battery (1) stored in the tray (120) and the gap space (G) around the secondary battery (1).

[0075] In this document, the symbol H represents the height direction, the symbol L represents the length direction of the secondary battery, and the symbol W represents the arrangement direction of the secondary battery on the tray.

[0076] The chamber (110) is installed in an activation room (R). The chamber (110) is provided such that each charging space (111, 112, 113, 114) is open to the outside. The chamber (110) may have a multi-layer structure in which two or more charging spaces (111, 112, 113, 114) are spaced apart from each other along the height direction (H).

[0077] The chamber (110) may include a power supply unit (115) for supplying electricity to the charging grippers (191, 192) of the charging spaces (111 and 112) on the first floor, and a power supply unit (116) for supplying electricity to the charging grippers (191, 192) of the charging spaces (113 and 114) on the second floor, for each floor.

[0078] The chamber (110) is provided with a chamber duct (117) between two charging spaces (111). The chamber duct (117) extends in the height direction (H) of the chamber (110) and can be fluidly connected to each of the charging spaces (111, 112, 113, 114) and the power supply unit (115, 116).

[0079] The secondary battery (1) may include a first electrode lead (5) and a second electrode lead (6) spaced apart from the first electrode lead (5) in the longitudinal direction (L) of the secondary battery (1). The secondary battery (1) according to the present embodiment may be a pouch-type secondary battery (1) illustrated in FIG. 1.

[0080] The above tray (120) has an open box structure having a tray bottom surface (121), a first support (125), and a second support (126). The tray (120) has a first open side (122) and a second open side (123).

[0081] The first open side (122) is an open portion between one side of the first support (125) and one side of the second support (126). The second open side (123) is an open portion between the other side of the first support (125) and the other side of the second support (126). The second open side (123) faces the first open side (122).

[0082] The first support (125) may have a first hole (125a) and a second hole (125b). In addition, the second support (126) may have a third hole (126a) and a fourth hole (126b). The first hole (125a) and the third hole (126a) are openings that are connected to the first open side (122) of the tray. The second hole (125b) and the fourth hole (126b) are openings that are connected to the second open side (123) of the tray.

[0083] Each secondary battery (1) is stored in the tray (120) between the first support (125) and the second support (126), with the first electrode lead (5) exposed to the first open side (122) and the second electrode lead (6) exposed to the second open side (123). The plurality of secondary batteries (1) are stored spaced apart from each other in the array direction (W) in the tray (120).

[0084] In the above tray (120), a plurality of gap spaces (G) are provided by the plurality of secondary batteries (1). The gap space (G) is a space between two adjacent secondary batteries (1) along the array direction (W).

[0085] The charging gripper electrically connected to the secondary battery (1) in the charging device of the secondary battery (1) is a known technology, and therefore, in this embodiment, a description of the detailed configuration and structure of the first charging gripper (191) and the second charging gripper (192) will be omitted.

[0086] The first charging gripper (191) enters the first open side (122) of the tray and is electrically connected to the first electrode leads (5) of the plurality of secondary batteries (1). In addition, the second charging gripper (192) enters the second open side (123) of the tray and is electrically connected to the second electrode leads (6) of the plurality of secondary batteries (1).

[0087] A plurality of secondary batteries (1) are stored in a single tray (120) and can be simultaneously charged and discharged in a charging space (111) of a chamber (110). The secondary batteries (1) generate heat through an electrochemical reaction during the charging and discharging process. The heat of the secondary batteries (1) is dissipated to an adjacent gap space (G). The gap space (G) is heated due to the heat of the secondary batteries (1).

[0088] As the temperature of the above gap space (G) increases, heat exchange between the heat of the secondary battery (1) and the air in the gap space (G) does not occur smoothly. If the heat of the secondary battery (1) is not properly dissipated, it causes a decrease in the performance and capacity of the secondary battery (1).

[0089] To solve this problem, the secondary battery charging / discharging device (100) can uniformly cool the temperatures of a plurality of secondary batteries (1) being simultaneously charged / discharged in the tray (120) through a thermoelectric cooling unit (140) provided to cool the air of the charging space (111) at the upper portion of the tray (120), and a first fan (150) provided to blow the cooling air (CA) to the secondary batteries (1) stored in the tray (120) and the gap space (G) surrounding the secondary batteries (1).

[0090] The thermoelectric cooling unit (140) is mounted in the charging space (111) so as to be spaced apart from the upper portion of the first open side (122) of the tray (120). The thermoelectric cooling unit (140) is provided to cool the air in the charging space (111). The thermoelectric cooling unit (140) includes a thermoelectric element (141), a plurality of cooling fins (147), and a plurality of heat dissipation fins (148).

[0091] The thermoelectric element (141) is an electrical element having two conductors made of different metals, and configured to absorb ambient heat from one conductor and release heat to the surroundings from the other conductor when current is applied. For example, the thermoelectric element (141) may be a Peltier element.

[0092] The plurality of cooling fins (147) are mounted on the cooling side of the thermoelectric element (141) and absorb heat from the surroundings. The plurality of heat dissipation fins (148) are mounted on the heating side of the thermoelectric element (141) and dissipate heat to the surroundings.

[0093] The above cooling fin (147) and the above heat dissipation fin (148) may be made of a metal with excellent thermal conductivity, for example, copper or aluminum.

[0094] The first fan (150) may be placed at the upper portion (111a) of the charging space (111). Specifically, the first fan (150) is placed at the upper portion (111a) of the first open side (122) of the tray (120) where the first electrode lead (5) of the secondary battery (1) is exposed. The first fan (150) may be arranged to exhaust the cooling air (CA) to the first open side (122) of the tray (120) in a linear flow parallel to the arrangement direction (W) of the secondary battery (1).

[0095] The first fan (150) may be a rod-shaped fan. The first fan (150) may include a cross flow fan.

[0096] The first fan (150) includes a first blade (153), a first intake port (151), and a first exhaust port (152) provided in a slit shape parallel to the first blade (153) on a side other than the first intake port (151).

[0097] The first exhaust port (152) is an opening on a different side from the first intake port (151). The first exhaust port (152) is a slit opening having a long length and a narrow rectangular cross-section.

[0098] The first fan (150) is arranged so that the first intake port (151) faces the cooling side of the thermoelectric cooling unit (140) and the first exhaust port (152) faces the first open side (122) of the tray (120).

[0099] The first fan (150) can traverse the cooling air (CA) in a direction parallel to the arrangement direction (W) when the first blade (153) rotates, and exhaust the cooling air (CA) to the first open side (122) through the first exhaust port (153).

[0100] The above cooling air (CA) can be blown downward toward the first open side (122) of the tray (120) along the height direction (H) in a linear flow parallel to the arrangement direction (W) of the secondary battery (1) through the first fan (150).

[0101] In addition, the charging / discharging device (100) of the secondary battery can install a second fan (160) on the second open side (123) of the tray to cause the cooling air (CA) to flow from the first open side (122) to the second open side (123) along the longitudinal direction (L) of the secondary battery (1).

[0102] The second fan (160) is installed in the charging space (111) so as to be fluidly movable with the second open side (123) of the tray (120). The second fan (160) may be placed in the lower part (111b) of the charging space (111). The second fan (160) is arranged to suck the cooling air (CA) from the first open side (122) to the second open side (123) along the longitudinal direction (L) of the secondary battery (1).

[0103] The second open side (123) of the tray (120) is a portion where the second electrode leads (6) of the plurality of secondary batteries (1) are exposed. The second open side (123) of the tray (120) is a portion that is opened to face the first open side (122) of the tray (120) along the longitudinal direction (L) of the secondary battery (1).

[0104] The second fan (160) may be diagonally arranged with the first fan (150) along the length direction (L) and height direction (H).

[0105] The second fan (160) may be arranged to suck in the heat-exchanged cooling air (CA1) in the gap space (G) along the longitudinal direction (L) and exhaust the heat-exchanged cooling air (CA1) to the outside of the charging space (111) in a direction different from the longitudinal direction (L).

[0106] The second fan (160) includes a second intake port (161), a second blade (162), and a second exhaust port (163). The second fan (160) is mounted in the chamber (110) such that the second intake port (161) is fluidly movable with the second open side (123) of the tray (120), and the second exhaust port (163) is fluidly movable with the outside of the charging space (111). The second fan (160) may include a centrifugal fan.

[0107] When the second fan (160) is in operation, the cooling air (CA) can exchange heat with the plurality of secondary batteries (1) while flowing through each gap space (G) from the first open side (122) of the tray (120) toward the second open side (123). The heat-exchanged cooling air (CA1) can be sucked into the charging space (111) through the second suction port (161) and exhausted to the outside of the charging space (111) through the second fan (160).

[0108] A fan hood (180) may be mounted on the second intake port (161) of the second fan (160).

[0109] The above fan hood (180) can expand the suction power of the second fan (160) to a plurality of gap spaces (G) spaced apart in the arrangement direction (W) of the secondary battery (1).

[0110] The above fan hood (180) is provided to guide the flow of heat-exchanged cooling air (CA1) of each gap space (G) to the second intake port (161).

[0111] The fan hood (180) fluidly connects the second suction port (161) of the second fan (160) and the second open side (123) of the tray (120), and is arranged at the lower part (111b) of the charging space (111) parallel to the arrangement direction (W) of the secondary battery (1).

[0112] The above fan hood (180) can guide the flow of the heat-exchanged cooling air (CA1) from each gap space (G) within the tray (120) to the second suction port (161) when the second fan (160) is in operation.

[0113] The fan hood (180) has a funnel structure. The fan hood (180) has a hood opening (181) and a hood passage (182). The hood opening (181) has a width greater than the width of the tray (120) and a height less than the height of the tray (120). The hood passage (182) is designed so that its cross-sectional area becomes narrower from the hood opening (181) toward the second suction port (161) of the second fan (160).

[0114] The fan hood (180) may be arranged such that the hood opening (181) is parallel to the arrangement direction (W) of the secondary battery (1). The fan hood (180) may be arranged at the lower portion (111b) of the second charging gripper (192). The fan hood (180) may be arranged at the lower portion (111b) of the charging space (111) between the second open side (123) of the tray (120) and the second charging gripper (192). For example, the second fan (160) may be arranged at the lower portion (111b) of the charging space (111) between the second open side (123) and the second charging gripper (192).

[0115] A secondary battery charging / discharging device (100) having the above-described configuration and structure evenly blows cooling air (CA) through a first fan (150) into a plurality of gap spaces (G) in a linear flow parallel to the arrangement direction (W) of the secondary batteries, and sucks the cooling air (CA) in the longitudinal direction (L) of the secondary batteries through the second fan (160), thereby allowing the cooling air (CA) to flow from the first open side (122) of the tray (120) toward the second open side (123) in each gap space (G).

[0116] Through this, the secondary battery charging / discharging device (100) can uniformly control the temperature of the plurality of secondary batteries (1) when charging / discharging the plurality of secondary batteries (1). In addition, the secondary battery charging / discharging device (100) can promote uniformity of performance and capacity of the plurality of secondary batteries (1) stored in one tray (120). In addition, the secondary battery charging / discharging device (100) can exhaust the heat-exchanged cooling air (CA1) to the outside of the charging space (111), thereby reducing the air conditioning cost of the activation room (R).

[0117] In addition, the secondary battery charging / discharging device (100) can improve the cooling efficiency of the charging space (111) by installing a third fan (170) on the heating side of the thermoelectric cooling unit (140).

[0118] The third fan (170) is arranged around the heat-generating side of the thermoelectric cooling unit (140) on the opposite side of the first fan (150). The third fan (170) is arranged to suck in hot air (HA) from the heat-generating side of the thermoelectric cooling unit (140) from the upper portion of the charging space (111) and exhaust the hot air (HA) to the outside of the charging space (111). The third fan (170) may include a centrifugal fan.

[0119] The third fan (170) includes a third intake port (171), a third blade (172), and a third exhaust port (173).

[0120] The third fan (170) may be mounted in the chamber (110) such that the third intake port (171) is positioned around the heat-generating side of the thermoelectric cooling unit (140), and the third exhaust port (173) is fluidly movable with the chamber duct (117).

[0121] When the third fan (170) is operated, the hot air (HA) is sucked into the internal space of the third fan (170) through the third intake port (171) and exhausted to the third exhaust port (173) through the third blade (172). The hot air (HA) is exhausted to the chamber duct (117) through the third exhaust port (173).

[0122] The above chamber duct (117) is a duct provided to be separated from the charging space (111). The above chamber duct (117) is a duct provided to exhaust the hot air (HA) to the outside of the activation room (R).

[0123] In addition, the charging / discharging device (100) of the secondary battery may include a temperature sensor (135, 135a) provided to detect the temperature of cooling air (CA1) heat-exchanged with the secondary battery (1) in the charging space (111). The temperature sensor may be provided in each charging space.

[0124] In addition, the charging / discharging device (100) of the secondary battery may include a controller (101) that controls the operation of the thermoelectric cooling unit (140) and the first fan (150) based on the temperature information of the temperature sensor (135, 135a).

[0125] The above temperature sensor (135) is mounted around the second open side (123) of the tray (120) and can detect the temperature of the heat-exchanged cooling air (CA1).

[0126] The controller (101) can control the operation of the thermoelectric cooling unit (140, 140a), the first fan (150, 150a), the second fan (160, 160a), and the third fan (170, 170a) so that the temperature within each charging space (111, 112) becomes a preset temperature based on the temperature information of the temperature sensor (135, 135a) provided in each charging space (111, 112).

[0127] For example, if the temperature of the heat-exchanged cooling air (CA1) detected by the temperature sensor (135) provided in any one of the charging spaces (111) is higher than the preset air conditioning temperature, the controller (101) can lower the cooling temperature of the thermoelectric cooling unit (140) and strongly adjust the speed of the first fan (150) to the third fan (170).

[0128] The controller (101) can increase the cooling temperature of the thermoelectric cooling unit (140) and weaken the speed of the first fan (150) to the third fan (170) when the temperature of the heat-exchanged cooling air (CA1) detected by the temperature sensor (135) is lower than the preset air conditioning temperature.

[0129] Referring to FIG. 5, a thermoelectric cooling unit (140a), a first fan (150a), a second fan (160a), a third fan (170a), and a fan hood (180a) installed in another charging space (112) may be arranged symmetrically with a thermoelectric cooling unit (140), a first fan (150), a second fan (160), a third fan (170), and a fan hood (180) installed in one charging space (111). In addition, in another charging space (112), a temperature sensor (135a) is mounted on a tray (120a) to detect the temperature of heat-exchanged cooling air (CA1) flowing to the second fan (160a).

[0130] Hot air (HA) of one charging space (111) can be exhausted to the chamber duct (117) through the third fan (170), and hot air (HA) of another charging space (112) can be exhausted to the chamber duct (117) through the third fan (170a).

[0131] Cooling air (CA1) heat-exchanged in one charging space (111) is exhausted to the activation room (R) through the second exhaust port (163) of the second fan (160), and cooling air (CA1) heat-exchanged in another charging space (112) is exhausted to the activation room (R) through the second exhaust port (163a) of the second fan (160a). The heat-exchanged cooling air (CA1) is exhausted from each charging space (111, 112) to the activation room (R), thereby lowering the temperature of the activation room (R).

[0132] The secondary battery charging / discharging device (100) can eliminate the temperature difference between the plurality of secondary batteries (1) and thereby achieve uniformity of performance and capacity of the plurality of secondary batteries (1).

[0133] In addition, the secondary battery charging / discharging device (100) can maintain the temperature of the plurality of secondary batteries (1) uniformly when charging the secondary battery (1), thereby reducing the temperature dispersion between the plurality of secondary batteries (1), thereby improving the low-voltage selection efficiency.

[0134]

[0135] FIG. 8 and FIG. 9 are drawings for explaining a charging and discharging device for a secondary battery according to a second embodiment of the present invention.

[0136] Hereinafter, a charging / discharging device for a secondary battery according to a second embodiment of the present invention will be described with reference to FIGS. 8 and 9.

[0137] A charging / discharging device (200) for a secondary battery according to a second embodiment may include a chamber (210) having at least one charging space (211), a pair of charging grippers (291, 292), a thermoelectric cooling unit (240), a temperature sensor, a first fan (250), and a second fan (260). In addition, the charging / discharging device (200) for a secondary battery may include a fan hood (280).

[0138] The above pair of charging grippers (291, 292), the thermoelectric cooling unit (240), the temperature sensor, the first fan (250) and the second fan (260) are mounted in each charging space (211). A tray (220) containing a plurality of secondary batteries (1) is accommodated in the charging space (211).

[0139] The tray (220), the chamber (210), the pair of charging grippers (291, 292), the temperature sensor, the first fan (250) and the second fan (260) according to the present embodiment have the same function and structure as the tray (120), the chamber (110), the pair of charging grippers (191, 192), the temperature sensor (135), the first fan (150) and the second fan (160) of the first embodiment described above.

[0140] In this embodiment, in order to avoid repetition of explanation, a thermoelectric cooling unit (240) different from that of the first embodiment described above will be described.

[0141] Referring to FIGS. 8 and 9, the thermoelectric cooling unit (240) includes a cooling side (242) of the thermoelectric cooling unit, a heat dissipation unit (243), and a heat pipe (249).

[0142] The cooling side (242) of the thermoelectric cooling unit includes a plurality of cooling fins (247). The cooling side (242) of the thermoelectric cooling unit is mounted in the charging space (211) and absorbs surrounding heat through the plurality of cooling fins (247) when current is applied.

[0143] The heat dissipation unit (243) includes a plurality of heat dissipation fins (248). The heat dissipation unit (243) is mounted in the chamber (210) outside the charging space (211). The heat dissipation unit (243) releases heat transferred from the heat pipe (249) to the surroundings through the plurality of heat dissipation fins (248). In order to disperse hot air (HA) around the heat dissipation fins (248), a blower fan (80) may be installed around the plurality of heat dissipation fins (248).

[0144] The heat pipe (249) connects the cooling side (242) of the thermoelectric cooling unit and the heat dissipation unit (243). The heat pipe (249) can transfer heat from the cooling side (242) of the thermoelectric cooling unit to the heat dissipation unit (243). The heat pipe (249) can have a copper or aluminum material with excellent thermal conductivity.

[0145] The heat pipe (249) transfers heat from the cooling side (242) of the thermoelectric cooling unit to the heat dissipation unit (243) through the working fluid. In the heat pipe (249), the working fluid is heated by the heat from the cooling side (242) of the thermoelectric cooling unit and becomes a gaseous state. The gaseous working fluid flows from the cooling side (242) of the thermoelectric cooling unit to the heat dissipation unit (243) along the heat pipe (249), and condenses into a liquid state while releasing heat from the heat dissipation unit (243). The liquid working fluid flows to the cooling side (242) of the thermoelectric cooling unit along the heat pipe (249).

[0146] The heat generated during the operation of the cooling side (242) of the thermoelectric cooling unit is transferred to the heat dissipation unit (243) through the heat pipe (249). The heat released from the heat dissipation unit (243) is dispersed to the surroundings by the wind blowing through the plurality of heat dissipation fins (248).

[0147] The cold air generated on the cooling side (242) of the thermoelectric cooling unit is exhausted to the first open side (222) of the tray (220) through the first fan (250). The first fan (250) includes a first blade (253), a first intake port (251), and a first exhaust port (252). In addition, the cooling air (CA) flows from the first open side (222) of the tray (220) to the second open side (223) along the longitudinal direction (L) of the secondary battery (1) through the second fan (260) and exchanges heat with the secondary battery (1). The second fan (260) includes a second intake port (261), a second blade (262), and a second exhaust port (263). The heat-exchanged cooling air (CA1) can be exhausted to the activation room (R), which is outside the charging space (211), through the second fan (260).

[0148] The secondary battery charging / discharging device (200) can cool the heat generated during charging / discharging of the plurality of secondary batteries (1) through the structure and operation method described above. The secondary battery charging / discharging device (200) can eliminate the temperature difference between the plurality of secondary batteries (1) during charging of the secondary batteries (1), thereby promoting uniformity of performance and capacity of the plurality of secondary batteries (1).

[0149]

[0150] Hereinafter, with reference to FIG. 10, a charging / discharging device for a secondary battery according to a third embodiment of the present invention will be described.

[0151] FIG. 10 is a drawing for explaining a charging / discharging device (300) of a secondary battery according to a third embodiment of the present invention.

[0152] A secondary battery charging / discharging device (300) according to a third embodiment includes a chamber (310) having at least one charging space (311, 312), a pair of charging grippers (not shown), a temperature sensor (335, 335a), a thermoelectric cooling unit (340, 340a), a first fan (350, 350a), a second fan (360, 360a), and a third fan (370, 370a). In addition, the secondary battery charging / discharging device (300) may include a fan hood (380, 380a).

[0153] The temperature sensor (335, 335a), the thermoelectric cooling unit (340, 340a), the first fan (350, 350a), the second fan (360, 360a), and the third fan (370, 370a) according to the third embodiment have the same structure and function as the temperature sensor (135, 135a), the thermoelectric cooling unit (140, 140a), the first fan (150, 150a), the second fan (160, 160a), and the third fan (170, 170a) according to the first embodiment described above, so that a detailed description thereof will be omitted in this embodiment to avoid repetition of explanation.

[0154] The chamber (110) according to the first embodiment described above has a structure in which a power supply unit (115) and a chamber duct (117) are arranged between two adjacent charging spaces (111, 112), whereas the chamber (310) according to the third embodiment has a structure in which a plurality of charging spaces (311, 312) are arranged continuously for each layer.

[0155] The chamber (310) is provided such that the charging space (311, 312) is fluidly movable with the room passage of the activation room (R). In the chamber (310) according to the present embodiment, the power supply unit (315) can be installed on the opposite side of the entry side of the charging space (311, 312) through which the tray (320, 320a) enters the charging space (311, 312).

[0156] The power supply unit (315) is electrically connected to a pair of charging grippers (not shown) mounted in the charging space (311, 312) at the rear of the charging space (311, 312). The arrangement of the pair of charging grippers (not shown) is the same as in the first embodiment described above.

[0157] The above thermoelectric cooling unit (340) cools the air in the charging space (311) to a preset cooling temperature. The cooling air (CA) is blown toward the first open side of the tray (320) parallel to the arrangement direction (W) of the secondary batteries (1) through the first fan (350).

[0158] When the first fan (350) and the second fan (360) are operated, the cooling air (CA) flows along each gap space (G) between the plurality of secondary batteries. The cooling air (CA) exchanges heat with the secondary batteries (1) while flowing from the first open side of the tray (320) toward the second open side along the longitudinal direction (L) of the secondary batteries in each gap space (G). The heat-exchanged cooling air (CA1) can be exhausted to the passage (309) of the activation room (R), which is outside the charging space (311), through the second fan (360).

[0159] When the thermoelectric cooling unit (340) is in operation, the heat generated in the thermoelectric cooling unit (340) can be exhausted to the activation room (R), which is outside the charging space (311), through the third fan (370).

[0160]

[0161] Hereinafter, a charging / discharging device for a secondary battery according to a fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12.

[0162] FIG. 11 and FIG. 12 are drawings for explaining a charging / discharging device of a secondary battery according to the fourth embodiment of the present invention.

[0163] A charging / discharging device (400) of a secondary battery according to the present embodiment includes a chamber (410) having at least one charging space (411), a thermoelectric cooling unit (440), a temperature sensor (435), an exhaust duct (450), a duct fan (459), and a plurality of blower fans (460).

[0164] The chamber (410) may have the same structure as the chamber (110) of the first embodiment described above. The chamber (410) is equipped with a pair of charging grippers (not shown) for each charging space (411), and is arranged to perform charging and discharging of the plurality of secondary batteries (1) for each charging space (411).

[0165] The above-described plurality of secondary batteries (9) are spaced apart and stored in a tray (420) with a gap space (G). For example, the secondary battery (9) may be a cylindrical battery cell. The secondary battery (9) is stored upright in the tray (420) so that the positive terminal (8) having a vent portion is exposed to the upper portion of the tray (420).

[0166] The above-described plurality of secondary batteries (9) can be simultaneously charged in the charging space (411). In this example, a description of the configuration of a charging gripper (not shown) electrically connected to the plurality of secondary batteries (9) and a power supply unit (not shown) that supplies electricity to the charging gripper will be omitted.

[0167] The above exhaust duct (450) is installed in each charging space (411) of the chamber (410). The exhaust duct (450) is spaced apart from the upper portion of the tray (420). The exhaust duct (450) is fluidly connected to the chamber duct (417).

[0168] A duct fan (459) is mounted at the outlet (452) of the exhaust duct (450). The duct fan (459) is provided to exhaust hot air (HA) of the duct space (451) to the chamber duct (117).

[0169] The above exhaust duct (450) is equipped with the thermoelectric cooling unit (440). Referring to Fig. 11, the thermoelectric cooling unit (440) includes a thermoelectric element (441), a plurality of cooling fins (447) mounted on the cooling side (442) of the thermoelectric element (441), and a plurality of heat dissipation fins (448) mounted on the heating side (443) of the thermoelectric element (441).

[0170] The above thermoelectric cooling unit (240) can be mounted on the exhaust duct (450) so that the heat dissipation fin (148) is exposed to the duct space (451) of the exhaust duct (450) and the cooling fin (147) is exposed from the outer surface of the exhaust duct (450) to the charging space (111).

[0171] The above thermoelectric cooling unit (440) may be arranged such that the arrangement direction of the heat dissipation fins (448) and the arrangement direction of the cooling fins (447) are orthogonal. The heat dissipation fins (448) may be arranged parallel to the flow direction of hot air (HA) in the duct space (451).

[0172] A blower fan (460) is positioned below the cooling fins (447). The blower fan (460) sucks in cooling air (CA) around the cooling fins (447) and blows it toward the tray (420). The cooling air (CA) is blown from the top to the bottom of the charging space (411) through the blower fan (460), and flows through the gap space (G) between the plurality of secondary batteries (1).

[0173] In the above gap space (G), the cooling air (CA) can dissipate heat generated during charging and discharging of the secondary battery (1) while exchanging heat with each secondary battery (1). The cooling air that has exchanged heat while flowing in the gap space (G) can be exhausted to the activation room (R).

[0174] The plurality of heat dissipation fins (448) may be mounted on the heat generating side (443) of the thermoelectric element (441) orthogonal to the arrangement direction of the plurality of cooling fins (447). The plurality of heat dissipation fins (448) may be mounted in the duct space (451) parallel to the longitudinal direction (L) of the exhaust duct (450).

[0175] When the above thermoelectric cooling unit (440) is in operation, the heating side (443) of the thermoelectric element (441) releases heat to the plurality of heat dissipation fins (448).

[0176] When the above duct fan (459) is in operation, the hot air (HA) around the heat dissipation fin (448) flows along the longitudinal direction (L) of the exhaust duct (450) and is exhausted to the chamber duct (417) through the exhaust duct (450) fan.

[0177] The secondary battery charging / discharging device (400) can cool the heat generated during charging / discharging of the plurality of secondary batteries (1) through the structure and operation method described above. The secondary battery charging / discharging device (400) can eliminate the temperature difference between the plurality of secondary batteries (1) during charging of the secondary batteries (1), thereby promoting uniformity of performance and capacity of the plurality of secondary batteries (1).

[0178] The preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims.

[0179] According to a charging / discharging device for a secondary battery according to one embodiment of the present invention, a plurality of secondary batteries can be uniformly cooled by flowing cooling air into a gap space of a tray in which a plurality of secondary batteries are stored.

Claims

1. A chamber including one or more individually accommodating charging spaces for storing secondary batteries, and a charging gripper electrically connected to the secondary batteries in the charging spaces; A thermoelectric cooling unit comprising a thermoelectric element and cooling fins arranged to transfer cold air from the cooling side of the thermoelectric element to the surroundings, and arranged to cool the air of the charging space at an upper portion of the charging space; A first fan provided to suck in cooling air around the thermoelectric cooling unit from the upper portion of the charging space and blow the cooling air toward the secondary battery stored in the tray; and A secondary battery charging / discharging device including a second fan that sucks air parallel to the longitudinal direction of the secondary battery from the lower portion of the charging space so that the cooling air flows along the longitudinal direction of the secondary battery.

2. In paragraph 1, A secondary battery charging / discharging device in which the first fan is positioned on the upper side of the first open side of the tray where the first electrode lead of the secondary battery is exposed, and is arranged to exhaust the cooling air to the first open side of the tray.

3. In paragraph 2, The first fan includes a first blade, a first intake port, and a first exhaust port provided in the form of a slit on a side other than the first intake port, A secondary battery charging / discharging device that crosses the cooling air in a direction parallel to the arrangement direction of the secondary battery when the first blade rotates and exhausts it to the first open side through the first exhaust port.

4. In paragraph 3, The above first fan is a charging / discharging device for a secondary battery including a cross flow fan.

5. In paragraph 2, A secondary battery charging / discharging device wherein the second fan is fluidly movable through the gap space of the tray through the second open side of the tray where the second electrode lead of the secondary battery is exposed, and is arranged to suck the cooling air from the first open side to the second open side along the longitudinal direction of the secondary battery.

6. In paragraph 2, The above thermoelectric cooling unit is placed on the upper side of one side of the charging space, The first fan is provided to suck in cooling air around the thermoelectric cooling unit from the upper side of one side of the charging space and blow the cooling air toward one side of the secondary battery stored in the tray. A secondary battery charging / discharging device in which the second fan is arranged to suck air parallel to the longitudinal direction of the secondary battery from the lower side of the other side of the charging space.

7. In paragraph 5, A charging / discharging device for a secondary battery, wherein the second fan is arranged diagonally with the first fan along the longitudinal and height directions.

8. In paragraph 5, A secondary battery charging / discharging device in which the second fan is arranged to suck in the heat-exchanged cooling air in the gap space along the longitudinal direction and exhaust the heat-exchanged cooling air to the outside of the charging space in a direction different from the longitudinal direction.

9. In paragraph 5, Additionally comprising a fan hood fluidly connecting the second intake of the second fan and the second open side of the tray, The above fan hood is a secondary battery charging / discharging device provided to guide the flow of heat-exchanged cooling air of each gap space to the second intake port.

10. In paragraph 9, The above fan hood is a charging / discharging device for a secondary battery, which is spaced apart from the lower portion of a charging gripper that is electrically connected to the secondary battery.

11. In paragraph 1, A secondary battery charging / discharging device further comprising a temperature sensor configured to detect the temperature of cooling air exchanged with the secondary battery in the charging space.

12. In paragraph 11, A secondary battery charging / discharging device further comprising a controller that controls the operation of the thermoelectric cooling unit and the first fan based on temperature information of the temperature sensor.

13. In paragraph 1, A secondary battery charging / discharging device, wherein the thermoelectric cooling unit further includes a heat dissipation fin configured to transfer heat from the heating side of the thermoelectric element to the surroundings.

14. In paragraph 13, A secondary battery charging / discharging device further comprising a third fan mounted in the chamber to suck in hot air around the heat dissipation fins of the thermoelectric cooling unit in the charging space and exhaust it to a chamber duct outside the charging space.

15. In paragraph 1, A heat dissipation unit having heat dissipation fins and installed outside the charging space; and A secondary battery charging / discharging device further comprising a heat pipe that connects the heat dissipation unit and the thermoelectric cooling unit and is arranged to transfer heat from the thermoelectric cooling unit to the heat dissipation unit.

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