Secondary battery charging / discharging device

Abstract

A charging / discharging apparatus for a secondary battery according to an embodiment of the present application includes a chamber including one or more charging spaces in which a tray storing a secondary battery can be individually accommodated, and having a charging clamp electrically connected to the secondary battery in the charging space; a thermoelectric cooling unit including a thermoelectric element and a cooling fin arranged to transfer cool air of a cooling side of the thermoelectric element to its surroundings and cool air in the charging space at an upper portion of the charging space; a first fan sucking the cool air around the thermoelectric cooling unit at the upper portion of the charging space and blowing the cool air toward the secondary battery accommodated in the tray; and a second fan sucking air at a lower portion of the charging space in a manner parallel to a longitudinal direction of the secondary battery, such that the cool air flows along the longitudinal direction of the secondary battery.

Description

Technical Field

[0001] This invention relates to a secondary battery charging and discharging device, and more specifically, to a secondary battery charging and discharging device capable of eliminating temperature deviations between multiple secondary batteries being charged and discharged in a single tray.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0054667, filed on April 24, 2024, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] With the increasing demand for mobile devices and the widespread adoption of electric vehicles, the demand for secondary batteries as an energy source is rapidly increasing, with a particular focus on lithium secondary batteries with high capacity and high energy density.

[0004] Typically, 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 rectangular metal can or a bag-shaped housing made of aluminum laminate, and injecting an electrolyte into the electrode assembly.

[0005] Figure 1 This is a diagram used to illustrate a pouch-shaped secondary battery.

[0006] refer to Figure 1 The pouch-shaped secondary battery (1) includes: a pouch-shaped housing (2) having cavities; an electrode assembly (3) housed in the pouch-shaped housing (2); and 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-shaped housing (2). The electrode assembly (3) is obtained by sequentially stacking a negative electrode, a positive electrode, and a separator placed between the negative electrode and the positive electrode.

[0007] The first electrode lead (5) is obtained by connecting the positive terminals of the electrode assembly (3) together. The second electrode lead (6) is obtained by connecting the negative terminals of the electrode assembly (3) together.

[0008] The lithium secondary batteries thus manufactured must be activated by performing predetermined charging and discharging processes before they can be used as batteries. This process is called the formation process or activation process.

[0009] For this activation process, a charging and discharging device (90) is used. The charging and discharging device (90) can charge and discharge multiple secondary batteries (1) simultaneously to improve the productivity of the secondary battery mass production process.

[0010] Figure 2 and Figure 3This is a view used to illustrate the airflow during the operation of a blower fan in a conventional secondary battery charging and discharging device. Figure 2 A perspective view schematically showing a chamber having a tray containing multiple secondary batteries (1) and a charging space is shown. Figure 3 A schematic plan view of the charging space into which the tray is inserted is shown.

[0011] refer to Figure 2 The charging and discharging device (90) is installed in the activation chamber (R). The charging and discharging device includes: a chamber (10) having a plurality of charging spaces (11); a plurality of air supply fans (60, 70) installed in each charging space (11); and a pair of charging clamps (31, 32) installed in each charging space (11).

[0012] The chamber (10) is arranged such that the charging space (11) is open to the activation chamber (R). The chamber (10) is arranged such that each charging space (11) can accommodate a tray (20). A plurality of secondary batteries (1) are accommodated in the tray (20).

[0013] With multiple secondary batteries (1) housed in a tray (20), the secondary batteries (1) are charged in the charging space (11). During charging and discharging, the secondary batteries (1) undergo electrochemical reactions, generating heat (Q) in the process. This heat is a disruptive factor that directly affects the performance of the secondary batteries (1).

[0014] The heat (Q) generated during the charging and discharging of the secondary battery (1) is dissipated into the gap space (G) around the secondary battery (1). The gap space (G) is the space between two adjacent secondary batteries (1). The corresponding gap spaces (G) are each arranged between two secondary batteries (1) along the arrangement direction of the secondary batteries (1).

[0015] refer to Figure 3 The heat from the secondary battery (1) is concentratedly dissipated into the gap space (G). The heat (Q) generated during the charging and discharging of the multiple secondary batteries (1) has been dispersed by multiple air supply fans (60, 70) installed in the charging space (11). The air supply fans (60, 70) circulate air into the charging space (11).

[0016] If the temperature of the charging space (11) rises due to the heat (Q) generated during the charging and discharging of the secondary battery (1), the temperature of the air from the ventilation fans (60, 70) also rises. If the heat (Q) generated during the charging of the secondary battery (1) raises the temperature of the charging space (11), the temperature of the air from the ventilation fans (60, 70) also rises, which may reduce the heat exchange efficiency with the secondary battery (1).

[0017] In conventional activation equipment, multiple air supply fans (60, 70) supply air to the upper part and rear surface of the tray (20). In conventional activation equipment, the air from the air supply fans (60, 70) mainly flows to the outer contour of the tray (20), and has difficulty flowing to the gap space (G) in the center of the tray (20). The corresponding gap space (G) is arranged in the space between two secondary batteries (1) along the arrangement direction (W) of the secondary batteries (1).

[0018] Since the airflow from the blower (60, 70) is difficult to reach the center of the tray (20), a temperature difference will occur between the secondary battery (1) housed on the outer edge of the tray (20) and the secondary battery (1) housed in the center of the tray (20) during the charging process.

[0019] Traditional activation equipment operates in a state where it is impossible to fundamentally remove the heat (Q) generated by the secondary battery (1) during the charging and discharging process, making it difficult to control the temperature when charging the secondary battery (1).

[0020] Furthermore, after repeated aging, charging, and discharging, the capacity of the secondary battery (1) is checked, and the low voltage of the secondary battery (1) is screened by measuring the open-circuit voltage (OCV) of the secondary battery (1). The low voltage screening of the secondary battery (1) is a process performed to check whether the secondary battery (1) maintains a normal voltage range during charging or discharging.

[0021] During the charging and discharging of the secondary battery (1), the temperature deviation between multiple secondary batteries (1) will affect 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) will not operate normally or will have a short lifespan. Low voltage secondary batteries (1) have the risk of internal fire in case of overcharging or over-discharging. Summary of the Invention

[0022] Technical issues

[0023] The present invention aims to solve the above-mentioned problems and aims to provide a secondary battery charging and discharging device that can eliminate temperature deviations between the multiple secondary batteries by allowing cooling air to flow into the gap space of a tray containing multiple secondary batteries, thereby uniformly cooling the multiple secondary batteries.

[0024] By way of an example of the present invention, it is intended to provide a secondary battery charging and discharging device that is capable of easily generating cold air for cooling within the chamber where the secondary battery is charged and discharged, and controlling the temperature of the cold air.

[0025] By way of one example of the present invention, it is intended to provide a secondary battery charging and discharging device in which effective cooling is performed by supplying cold air along the longitudinal direction of the gap space formed between the secondary batteries (i.e., the longitudinal direction of the secondary batteries).

[0026] By way of one example of the present invention, it is intended to provide a secondary battery charging and discharging device that effectively supplies cold air to the gap space between the secondary batteries by forming a forced downward flow of cold air toward one side of the secondary batteries and by forming a forced suction flow of air on the other side of the secondary batteries.

[0027] Technical solution

[0028] To achieve the above objectives, the secondary battery charging and discharging device has the following configuration and structure.

[0029] To achieve the above objectives, a secondary battery charging and discharging device according to an example of the present invention may include: a chamber comprising one or more charging spaces capable of individually accommodating a tray, the tray accommodating a secondary battery, and each charging space being equipped with a charging clamp arranged to be electrically connected to the secondary battery in each charging space; a thermoelectric cooling section comprising a thermoelectric element and a cooling fin arranged to transfer cold air from the cooling side of the thermoelectric element to the surrounding environment, and the thermoelectric cooling section being arranged to cool the air in the charging space at an upper portion of the charging space; and a first fan arranged to draw in cooling air from around the thermoelectric cooling section and blow the cooling air into the gap space between the secondary battery housed in the tray and the surrounding environment of the secondary battery.

[0030] Furthermore, according to an example of the present invention, a secondary battery charging and discharging device can be provided, the secondary battery charging and discharging device comprising: a chamber including one or more charging spaces capable of individually accommodating a tray, the tray accommodating a secondary battery, and each charging space being provided with a charging clamp arranged to be electrically connected to the secondary battery in the charging space; a thermoelectric cooling section including a thermoelectric element and a cooling fin, the cooling fin being arranged to transfer cold air from the cooling side of the thermoelectric element to the surrounding environment and to cool the air in the charging space at an upper portion of the charging space; a first fan provided to draw cooling air from around the thermoelectric cooling section at an upper portion of the charging space and blow the cooling air toward the secondary battery housed in the tray; and a second fan provided to draw air at a lower portion of the charging space in a manner parallel to the longitudinal direction of the secondary battery, thereby causing the cooling air to flow along the longitudinal direction of the secondary battery.

[0031] Furthermore, according to an example of the present invention, a secondary battery charging and discharging device can be provided, the secondary battery charging and discharging device comprising: a chamber including one or more charging spaces capable of individually accommodating a tray, the tray accommodating a secondary battery, and each charging space being provided with a charging clamp arranged to be electrically connected to the secondary battery in the charging space; a thermoelectric cooling section including a thermoelectric element and a cooling fin, the cooling fin being arranged to transfer cold air from the cooling side of the thermoelectric element to the surrounding environment, and being arranged to cool the air in the charging space at an upper portion on one side of the charging space; a first fan arranged to draw cooling air from the surroundings of the thermoelectric cooling section at an upper portion on one side of the charging space and blow the cooling air toward one side of the secondary battery housed in the tray; and a second fan arranged to draw air at a lower portion on the other side of the charging space in a manner parallel to the longitudinal direction of the secondary battery, thereby causing the cooling air to flow along the longitudinal direction of the secondary battery.

[0032] Furthermore, the first fan can be positioned at the upper part of the first open side of the tray, where the first electrode lead of the secondary battery is exposed. The first fan can be arranged to exhaust cooling air to the first open side of the tray. For example, the first fan can be arranged to exhaust cooling air to the first open side of the tray in a linear airflow parallel to the arrangement direction of the secondary battery.

[0033] Furthermore, the first fan may include a first blade, a first suction port, and a first discharge port. The first discharge port is located on a side different from the side where the first suction port is located and is formed in a slit shape. The first discharge port may be arranged in a slit shape parallel to the first blade. When the first blade rotates, the first fan can discharge cooling air to the first open side through the first discharge port by causing the cooling air to travel laterally in a direction parallel to the arrangement direction.

[0034] As an example, the first fan may include a crossflow fan.

[0035] Furthermore, the second fan can be arranged diagonally opposite to the first fan along both the longitudinal and vertical directions.

[0036] As an example, the second fan can be arranged to be in fluid communication with the gap space of the tray through a second open side of the tray, the second electrode lead of the secondary battery being exposed at the second open side of the tray, and the second fan can be arranged to draw 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 part of one side of the charging space can refer to the upper part of the first open side of the tray where the first electrode lead of the secondary battery is exposed, and the upper part of the other side of the charging space can refer to the upper part of the second open side of the tray where the second electrode lead of the secondary battery is exposed.

[0037] Furthermore, the thermoelectric cooling section can be located at the upper part of one side of the charging space, and the first fan can be configured to draw cooling air around the thermoelectric cooling section at the upper part of one side of the charging space and blow the cooling air toward one side of the secondary battery housed in the tray; and the second fan can be arranged at the lower part of the other side of the charging space to draw air in a manner parallel to the longitudinal direction of the secondary battery.

[0038] The second fan can be arranged to draw in the cooling air that has undergone heat exchange in the gap space along the longitudinal direction, and discharge the cooling air that has undergone heat exchange to the outside of the charging space in a direction different from the longitudinal direction.

[0039] Furthermore, the secondary battery charging and discharging device may include a fan shroud connecting the second suction port of the second fan and the second open side of the tray, thereby enabling fluid movement between the second suction port of the second fan and the second open side of the tray. The fan shroud can extend the suction force of the second fan to each spaced apart in the arrangement direction of the secondary batteries. The fan shroud may be arranged to direct the airflow of heat-exchanged cooled air from each space to the second suction port.

[0040] The fan cover can be configured to be spaced apart from the lower part of the charging clamp electrically connected to the secondary battery.

[0041] Additionally, the secondary battery charging and discharging device may include a temperature sensor arranged to sense the temperature of cooling air that has exchanged heat with the secondary battery in the charging space.

[0042] In addition, the secondary battery charging and discharging device may include a controller that controls the operation of the thermoelectric cooling unit and the first fan based on the temperature information from the temperature sensor.

[0043] The thermoelectric cooling unit may include heat sinks arranged to transfer hot air from the heating side of the thermoelectric element to the surrounding environment.

[0044] Additionally, the secondary battery charging and discharging equipment may include a third fan installed in the chamber to draw hot air around the heat sink of the thermoelectric cooling unit in the charging space, thereby discharging the hot air to the chamber duct outside the charging space.

[0045] Furthermore, the secondary battery charging and discharging device may include a discharge pipe installed in the charging space at the top of the tray, and the thermoelectric cooling unit may be installed in the discharge pipe such that the heat sink is exposed to the pipe space of the discharge pipe, and the cooling fin is exposed to the charging space from the outer surface of the discharge pipe.

[0046] The heat sink can be configured to be parallel to the direction of hot air flow in the duct space.

[0047] The thermoelectric cooling section can be arranged such that the arrangement direction of the heat sink and the arrangement direction of the cooling fins are orthogonal.

[0048] The discharge duct may be installed in the chamber to be in fluid communication with the chamber duct, wherein the duct space is separated from the charging space, and the discharge duct may include a duct fan arranged to discharge hot air from the duct space into the chamber duct by means of an outlet of the discharge duct.

[0049] In addition, the secondary battery charging and discharging device may include: a heat dissipation section having heat sinks and being installed outside the charging space; and a heat pipe connecting the heat dissipation section and the thermoelectric cooling section and being arranged to transfer heat from the thermoelectric cooling section to the heat dissipation section.

[0050] The cooling fin and the first fan can be disposed inside the charging space. Specifically, the cooling fin and the first fan can be disposed on the upper part of one side of the charging space. Furthermore, the front surface of the chamber can be opened, through which a tray containing the secondary battery can be inserted and removed. Then, by the exhaust pressure of the first fan, outside air can be introduced between the first fan and the cooling fin through the upper front part of the chamber and cooled.

[0051] The cooling temperature of the cooling fins can be controlled by controlling the thermoelectric element. Therefore, the temperature of the cooling air can be controlled. Thus, even without providing a separate cooling cycle, controllable cooling air can be easily generated and supplied within the charging space.

[0052] Simultaneously, multiple secondary batteries can be arranged in parallel on the tray. Therefore, the gaps between the secondary batteries can also form multiple channels. Cooling air needs to be supplied and discharged evenly into these multiple channels.

[0053] Therefore, preferably, the first fan is a crossflow fan for uniformly supplying cool air to all inlets of the multiple channels. Furthermore, preferably, a duct is provided at the front end of the second fan for uniformly drawing air from all outlets of the multiple channels.

[0054] By utilizing the positional characteristics of the cooling fins of the thermoelectric element, along with the first and second fans, a secondary battery charging and discharging device capable of providing compact, controllable, and efficient cooling performance can be provided.

[0055] Beneficial effects

[0056] The secondary battery charging and discharging device having the above-described structure and configuration has the following effects.

[0057] The secondary battery charging and discharging device can uniformly cool the multiple secondary batteries by allowing cooling air to flow into the gap space of the tray in which the multiple secondary batteries are housed, thereby eliminating temperature deviations between the multiple secondary batteries according to their positions in the tray during charging and discharging.

[0058] Furthermore, the secondary battery charging and discharging equipment can eliminate temperature deviations between multiple secondary batteries that are charged and discharged under the same conditions, thereby achieving uniformity in the performance and capacity of the multiple secondary batteries, and also improving the low-voltage screening capability of the secondary batteries.

[0059] Furthermore, the secondary battery charging and discharging device can use two fans (i.e., a first fan and a second fan) to allow cooling air to flow into the gap space of the tray, thereby achieving a compact device.

[0060] In addition, the secondary battery charging and discharging equipment can discharge the cooling air that has overheated with the secondary battery in the charging space to the activation chamber to reduce the temperature of the activation chamber, thereby saving the air conditioning cost for temperature control of the activation chamber.

[0061] Furthermore, the secondary battery charging and discharging equipment can discharge hot air (which has absorbed the heat generated during the cooling of the air in the charging space) into the chamber duct, thereby improving the air conditioning efficiency in the charging space.

[0062] Furthermore, the secondary battery charging and discharging device can adjust the cooling temperature of the thermoelectric cooling section to a preset temperature based on the temperature information of the cooling air that undergoes overheating exchange in the charging space, so as to charge and discharge multiple secondary batteries under optimized conditions, thereby improving the capacity and performance of the secondary batteries. Attached Figure Description

[0063] Figure 1 This is a view used to illustrate a pouch-type secondary battery.

[0064] Figure 2 and Figure 3 This is a view used to illustrate the airflow during the operation of a blower fan in a conventional secondary battery charging and discharging device, wherein... Figure 2 A perspective view schematically illustrates a charging and discharging device having a tray in which multiple secondary batteries are housed and a charging space. Figure 3 A schematic plan view of the charging space in which the tray is inserted is shown.

[0065] Figures 4 to 7 This is a view used to illustrate the secondary battery charging and discharging device according to the first example of the present invention.

[0066] Figure 4 The illustration schematically shows the state in which the tray is contained in the chamber according to the first example of the invention.

[0067] Figure 5 A schematic plan view of a secondary battery charging and discharging device according to a first example of the present invention is shown.

[0068] Figure 6 A side view of a secondary battery charging and discharging device according to a first example of the invention is shown schematically.

[0069] Figure 7 It is a view used to illustrate the arrangement and airflow of the first fan, second fan and third fan of the tray according to the first example of the present invention.

[0070] Figure 8 and Figure 9 This is a view used to illustrate the secondary battery charging and discharging device according to the second example of the present invention.

[0071] Figure 10 This is a view used to illustrate the secondary battery charging and discharging device according to the third example of the present invention.

[0072] Figure 11 and Figure 12 This is a view used to illustrate the secondary battery charging and discharging device according to the fourth example of the present invention. Detailed Implementation

[0073] In the following description, a secondary battery charging and discharging device according to an example of the present invention will be described with reference to the accompanying drawings.

[0074] Figures 4 to 7 This is a view used to illustrate the secondary battery charging and discharging device according to a first example of the present invention, wherein, Figure 4 The illustration schematically shows the state in which the tray is contained within the chamber. Figure 5 A schematic plan view of the secondary battery charging and discharging equipment is shown. Figure 6 A schematic side view of a secondary battery charging and discharging device is shown. Figure 7 It is a view used to illustrate the arrangement and airflow of the first fan, second fan and third fan of the tray according to the first example of the present invention.

[0075] A secondary battery charging and discharging device (100) associated with a first example of the present invention includes a chamber (110) comprising one or more charging spaces (111, 112, 113, 114), each capable of individually accommodating a tray (120) in which a secondary battery (1) is housed, and each of the charging spaces (111, 112, 113, 114) is provided with a charging clamp (191, 192) arranged to be electrically connected to the secondary battery (1). Furthermore, the tray (120, 120a, 120b, 120c) can be housed within each charging space (111, 112, 113, 114).

[0076] Furthermore, the secondary battery charging and discharging device (100) includes a thermoelectric cooling section (140), which includes a thermoelectric element (141) and a cooling plate (147). The cooling plate (147) is arranged to transfer cold air from the cooling side of the thermoelectric element (141) to the surrounding environment. The thermoelectric cooling section (140) is arranged to cool the air in the charging space (111) above the tray (120).

[0077] In addition, the secondary battery charging and discharging device (100) includes a first fan (150) configured to draw cooling air (CA) from around the thermoelectric cooling section (140) and blow the cooling air (CA) to the secondary battery (1) housed in the tray (120) and the gap space (G) around the secondary battery (1).

[0078] In this paper, the symbol H represents the height direction, the symbol L represents the longitudinal direction of the secondary battery, and the symbol W represents the arrangement direction of the secondary batteries on the tray.

[0079] The chamber (110) is installed in the activation chamber (R). The chamber (110) is arranged such that each charging space (111, 112, 113, 114) is open to the outside. The chamber (110) may have a multi-layer structure, wherein two or more charging spaces (111, 112, 113, 114) are arranged to be spaced apart from each other along the height direction (H).

[0080] The chamber (110) may include: a power supply unit (115) for supplying power to the charging clamps (191, 192) of the first charging space (111 and 112); and a power supply unit (116) for supplying power to the charging clamps (191, 192) of the second charging space (113 and 114).

[0081] The chamber (110) has a chamber conduit (117) arranged between two charging spaces (111). The chamber conduit (117) extends in the height direction (H) of the chamber (110) and can be in fluid communication with the corresponding charging spaces (111, 112, 113, 114) and power supply units (115, 116).

[0082] The secondary battery (1) may include a first electrode lead (5) and a second electrode lead (6), wherein the second electrode lead (6) is spaced apart from the first electrode lead (5) in the longitudinal direction (L) of the secondary battery (1). The secondary battery (1) according to this example may be as follows: Figure 1 The pouch-type secondary battery shown is (1).

[0083] The tray (120) has an open box-like structure, including a 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).

[0084] The first open side (122) is an open portion located between one side of the first support member (125) and one side of the second support member (126). The second open side (123) is an open portion located between the other side of the first support member (125) and the other side of the second support member (126). The second open side (123) faces the first open side (122).

[0085] The first support member (125) may have a first hole (125a) and a second hole (125b). Additionally, the second support member (126) may have a third hole (126a) and a fourth hole (126b). The first hole (125a) and the third hole (126a) are openings communicating with a first open side (122) of the tray. The second hole (125b) and the fourth hole (126b) are openings communicating with a second open side (123) of the tray.

[0086] Each secondary battery (1) is housed in the tray (120) and positioned between the first support (125) and the second support (126), such that the first electrode lead (5) is exposed on the first open side (122) and the second electrode lead (6) is exposed on the second open side (123). A plurality of secondary batteries (1) are spaced apart from each other along an arrangement direction (W) and housed in the tray (120).

[0087] In the tray (120), multiple gap spaces (G) are formed by multiple secondary batteries (1). The gap space (G) is the space between two adjacent secondary batteries (1) along the arrangement direction (W).

[0088] In the charging device for the secondary battery (1), the charging clamps electrically connected to the secondary battery (1) are known technologies. Therefore, in this example, the detailed configuration and structure of the first charging clamp (191) and the second charging clamp (192) will be omitted.

[0089] The first charging clamp (191) enters the first open side (122) of the tray to electrically connect to the first electrode leads (5) of the plurality of secondary batteries (1). Then, the second charging clamp (192) enters the second open side (123) of the tray to electrically connect to the second electrode leads (6) of the plurality of secondary batteries (1).

[0090] Multiple secondary batteries (1) can be housed in a tray (120) so that charging and discharging can occur simultaneously in the charging space (111) of the chamber (110). The secondary batteries (1) generate heat through electrochemical reactions during the charging and discharging process. The heat from the secondary batteries (1) is dissipated into adjacent gap spaces (G). The gap spaces (G) are heated due to the heat from the secondary batteries (1).

[0091] As the gap space (G) is heated, heat exchange between the secondary battery (1) and the air in the gap space (G) cannot proceed smoothly. If the heat of the secondary battery (1) is not properly dissipated, the performance and capacity of the secondary battery (1) will decrease.

[0092] To address this problem, the secondary battery charging and discharging device (100) can uniformly cool the temperature of multiple secondary batteries (1) that are simultaneously charging and discharging in the tray (120) via the thermoelectric cooling unit (140) and the first fan (150). The thermoelectric cooling unit (140) is arranged to cool the air in the charging space (111) above the tray (120), and the first fan (150) is arranged to blow cooling air (CA) to the secondary batteries (1) housed in the tray (120) and the gap space (G) around the secondary batteries (1).

[0093] The thermoelectric cooling unit (140) is installed in the charging space (111) and spaced apart from the upper part of the first open side (122) of the tray (120). The thermoelectric cooling unit (140) is arranged 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 sinks (148).

[0094] The thermoelectric element (141) is an electrical element having two conductors made of different metals, and is arranged such that when an electric current is applied, one conductor absorbs heat from the surroundings while the other conductor releases heat to the surroundings. For example, the thermoelectric element (141) may be a Peltier element.

[0095] Multiple cooling fins (147) are mounted on the cooling side of the thermoelectric element (141) and absorb heat from the surroundings. Multiple heat sinks (148) are mounted on the heating side of the thermoelectric element (141) and release heat to the surroundings.

[0096] The cooling fins (147) and heat sinks (148) may be made of metals with excellent thermal conductivity, such as copper or aluminum.

[0097] The first fan (150) may be disposed at the upper part (111a) of the charging space (111). Specifically, the first fan (150) is disposed at the upper part (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 such that cooling air (CA) is discharged to the first open side (122) of the tray (120) in a linear airflow parallel to the arrangement direction (W) of the secondary battery (1).

[0098] The first fan (150) may be a rod-shaped fan. The first fan (150) may include a cross-flow fan.

[0099] The first fan (150) includes a first blade (153), a first suction port (151) and a first discharge port (152), wherein the first discharge port (152) is arranged on a side different from the side where the first suction port (151) is located, and is formed as a slit parallel to the first blade (153).

[0100] The first discharge port (152) is an opening located on a side different from the side where the first suction port (151) is located. The first discharge port (152) is a slit opening with a long length and a short width and a rectangular cross-section.

[0101] The first fan (150) is arranged such that the first suction port (151) faces the cooling side of the thermoelectric cooling section (140), and the first discharge port (152) faces the first open side (122) of the tray (120).

[0102] The first fan (150) can cause the cooling air (CA) to travel laterally in a direction parallel to the arrangement direction (W) when the first blade (153) rotates, and discharge the cooling air (CA) to the first open side (122) through the first discharge port (152).

[0103] The first fan (150) can blow cooling air (CA) downwards along the height direction (H) toward the first open side (122) of the tray (120) in a linear airflow parallel to the arrangement direction (W) of the secondary battery (1).

[0104] Furthermore, the secondary battery charging and discharging device (100) may be equipped with a second fan (160) on the second open side (123) of the tray, so that cooling air (CA) flows from the first open side (122) to the second open side (123) along the longitudinal direction (L) of the secondary battery (1).

[0105] The second fan (160) is installed in the charging space (111) to be in fluid communication with the second open side (123) of the tray (120). The second fan (160) may be located at the lower part (111b) of the charging space (111). The second fan (160) is arranged to draw 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).

[0106] The second open side (123) of the tray (120) is the portion that exposes the second electrode leads (6) of the plurality of secondary batteries (1). The second open side (123) of the tray (120) is the open portion facing the first open side (122) of the tray (120) in the longitudinal direction (L) of the secondary batteries (1).

[0107] The second fan (160) may be arranged diagonally opposite to the first fan (150) along the longitudinal direction (L) and the height direction (H).

[0108] The second fan (160) can be arranged to draw in the cooling air (CA1) that has undergone heat exchange in the gap space (G) along the longitudinal direction (L), and to discharge the heat-exchanged cooling air (CA1) to the outside of the charging space (111) in a direction different from the longitudinal direction (L).

[0109] The second fan (160) includes a second suction port (161), a second blade (162), and a second discharge port (163). The second fan (160) is configured such that the second suction port (161) is in fluid communication with a second open side (123) of the tray (120), and the second fan (160) is mounted in the chamber (110) such that the second discharge port (163) is in fluid communication with the outside of the charging space (111). The second fan (160) may include a centrifugal fan.

[0110] When the second fan (160) is running, cooling air (CA) flows from the first open side (122) of the tray (120) toward the second open side (123) through each gap space (G) and can exchange heat with multiple secondary batteries (1). The cooled air (CA1) after heat exchange can be drawn into the charging space (111) through the second suction port (161) and discharged to the outside of the charging space (111) through the second discharge port (163).

[0111] A fan cover (180) may be installed on the second suction port (161) of the second fan (160).

[0112] The fan cover (180) can extend the suction force of the second fan (160) to a plurality of gap spaces (G) spaced apart in the arrangement direction (W) of the secondary battery (1).

[0113] The fan shroud (180) is arranged to direct the airflow of heat-exchanged cooling air (CA1) in each gap space (G) to the second suction port (161).

[0114] The fan shroud (180) connects the second suction port (161) of the second fan (160) and the second open side (123) of the tray (120), thereby allowing fluid to move between the second suction port (161) of the second fan (160) and the second open side (123) of the tray (120), and the fan shroud (180) is disposed in the lower part (111b) of the charging space (111) in a manner parallel to the arrangement direction (W) of the secondary battery (1).

[0115] When the second fan (160) is running, the fan shroud (180) can guide the airflow of heat-exchanged cooling air (CA1) from each gap space (G) in the tray (120) to the second suction port (161).

[0116] The fan shroud (180) has a funnel structure. The fan shroud (180) has a shroud opening (181) and a shroud passage (182). The width of the shroud opening (181) is greater than the width of the tray (120), and the height of the shroud opening (181) is less than the height of the tray (120). The shroud passage (182) is arranged such that its cross-sectional area narrows from the shroud opening (181) to the second suction port (161) of the second fan (160).

[0117] The fan cover (180) can be configured such that the opening (181) of the cover is parallel to the arrangement direction (W) of the secondary battery (1). The fan cover (180) can be disposed at the lower part of the second charging clamp (192). The fan cover (180) can be disposed at the lower part (111b) of the charging space (111) and located between the second open side (123) of the tray (120) and the second charging clamp (192). As an example, the second fan (160) can be disposed at the lower part (111b) of the charging space (111) and located between the second open side (123) and the second charging clamp (192).

[0118] The secondary battery charging and discharging device (100) with this configuration and structure blows cooling air (CA) into a plurality of gap spaces (G) in a linear airflow parallel to the arrangement direction (W) of the secondary battery by the first fan (150), and draws cooling air (CA) along the longitudinal direction (L) of the secondary battery by the second fan (160), so that the cooling air (CA) can flow from the first open side (122) of the tray (120) toward the second open side (123) in each gap space (G).

[0119] Therefore, the secondary battery charging and discharging device (100) can uniformly regulate the temperature of the multiple secondary batteries (1) during charging and discharging. Furthermore, the secondary battery charging and discharging device (100) can achieve uniformity in the performance and capacity of the multiple secondary batteries (1) housed in a tray (120). In addition, the secondary battery charging and discharging device (100) can discharge the cooled air (CA1) after heat exchange to the outside of the charging space (111), thereby reducing the air conditioning cost of the activation chamber (R).

[0120] Furthermore, the secondary battery charging and discharging device (100) can improve the cooling efficiency of the charging space (111) by installing a third fan (170) on the heat-generating side of the thermoelectric cooling section (140).

[0121] The third fan (170) is disposed on the opposite side of the first fan (150) and located around the heat-generating side of the thermoelectric cooling unit (140). The third fan (170) is arranged to draw hot air (HA) from the heat-generating side of the thermoelectric cooling unit (140) at the upper part of the charging space (111) and discharge the hot air (HA) to the outside of the charging space (111). The third fan (170) may include a centrifugal fan.

[0122] The third fan (170) includes a third suction port (171), a third blade (172), and a third discharge port (173).

[0123] The third fan (170) can be installed in the chamber (110) such that the third suction port (171) is disposed around the heating side of the thermoelectric cooling section (140) and the third discharge port (173) is in fluid communication with the chamber pipe (117).

[0124] When the third fan (170) is running, hot air (HA) is drawn into the internal space of the third fan (170) through the third suction port (171) and discharged to the third discharge port (173) through the third blades (172). The hot air (HA) is discharged to the chamber duct (117) through the third discharge port (173).

[0125] The chamber conduit (117) is a conduit arranged to be separated from the charging space (111). The chamber conduit (117) is a conduit arranged to exhaust hot air (HA) to the outside of the charging space (111).

[0126] Furthermore, the secondary battery charging and discharging device (100) may include temperature sensors (135, 135a) arranged to sense the temperature of cooling air (CA1) that exchanges heat with the secondary battery (1) in the charging space (111). The temperature sensors may be located in each charging space.

[0127] In addition, the secondary battery charging and discharging device (100) 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 sensors (135, 135a).

[0128] The temperature sensor (135) can be mounted around the second open side (123) of the tray (120) to sense the temperature of the cooling air (CA1) that has undergone heat exchange.

[0129] The controller (101) can control the operation of each of the thermoelectric cooling units (140, 140a), the first fan (150, 150a), the second fan (160, 160a), and the third fan (170, 170a) based on the temperature information of the temperature sensors (135, 135a) set in each charging space (111, 112), so that the temperature in each charging space (111, 112) becomes a preset temperature.

[0130] For example, when a temperature sensor (135) located in any of the charging spaces (111) senses that the temperature of the cooling air (CA1) after heat exchange is higher than the preset air conditioning temperature, the controller (101) can reduce the cooling temperature of the thermoelectric cooling unit (140) and increase the intensity of the first fan (150) to the third fan (170).

[0131] When the temperature sensor (135) senses that the temperature of the cooled air (CA1) after heat exchange is lower than the preset air conditioning temperature, the controller (101) can increase the cooling temperature of the thermoelectric cooling unit (140) and reduce the intensity of the first fan (150) to the third fan (170).

[0132] refer to Figure 5 The thermoelectric cooling unit (140a), first fan (150a), second fan (160a), third fan (170a), and fan cover (180a) installed in another charging space (112) can be arranged symmetrically with the thermoelectric cooling unit (140), first fan (150), second fan (160), third fan (170), and fan cover (180) installed in one charging space (111). Furthermore, in the other charging space (112), a temperature sensor (135a) is mounted on a tray (120a) to sense the temperature of the cooled air (CA1) that has undergone heat exchange flowing towards the second fan (160a).

[0133] Hot air (HA) from one charging space (111) can be discharged into the chamber duct (117) via the third fan (170), and hot air (HA) from another charging space (112) can be discharged into the chamber duct (117) via the third fan (170a).

[0134] Cooling air (CA1) that has undergone heat exchange in one charging space (111) is discharged into the activation chamber (R) through the second exhaust port (163) of the second fan (160), and cooling air (CA1) that has undergone heat exchange in another charging space (112) is discharged into the activation chamber (R) through the second exhaust port (163a) of the second fan (160a). The cooling air (CA1) that has undergone heat exchange is discharged from each charging space (111, 112) into the activation chamber (R), thereby raising the temperature of the activation chamber (R).

[0135] The secondary battery charging and discharging device (100) can achieve uniformity of the performance and capacity of the multiple secondary batteries (1) by eliminating temperature deviations between them.

[0136] Furthermore, when the secondary battery (1) is being charged, the secondary battery charging and discharging device (100) reduces temperature fluctuations between the multiple secondary batteries (1) by uniformly maintaining the temperature of the multiple secondary batteries (1), thereby improving low voltage screening efficiency.

[0137] Figure 8 and Figure 9 This is a view used to illustrate the secondary battery charging and discharging device according to the second example of the present invention.

[0138] In the following text, reference will be made to Figure 8 and Figure 9 A secondary battery charging and discharging device according to a second example of the present invention is described.

[0139] The secondary battery charging and discharging device (200) according to the second example may include: a chamber (210) having at least one charging space (211); a pair of charging clamps (291, 292); a thermoelectric cooling section (240); a temperature sensor; a first fan (250); and a second fan (260). Furthermore, the secondary battery charging and discharging device (200) may include a fan shroud (280).

[0140] The paired charging clamps (291, 292), thermoelectric cooling unit (240), temperature sensor, first fan (250) and second fan (260) are installed in each charging space (211). A tray (220) containing a plurality of secondary batteries (1) is housed in the charging space (211).

[0141] According to this example, the tray (220), chamber (210), paired charging clamps (291, 292), temperature sensor, first fan (250) and second fan (260) have the same function and structure as the tray (120), chamber (110), paired charging clamps (191, 192), temperature sensor (135), first fan (150) and second fan (160) in the first example above.

[0142] To avoid repeating the description in this example, a thermoelectric cooling section (240) different from the first example above will be described.

[0143] refer to Figure 8 and Figure 9 The thermoelectric cooling section (240) includes a cooling side (242), a heat dissipation section (243), and a heat pipe (249).

[0144] 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 installed in the charging space (211) and absorbs ambient heat through the plurality of cooling fins (247) when an electric current is applied.

[0145] The heat dissipation unit (243) includes a plurality of heat sinks (248). The heat dissipation unit (243) is installed from the outside of the charging space (211) to the chamber (210). The heat dissipation unit (243) releases the heat transferred from the heat pipe (249) to the surrounding environment through the plurality of heat sinks (248). In order to dissipate the hot air (HA) around the heat sinks (248), a fan (80) can be installed around the plurality of heat sinks (248).

[0146] 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) may be made of copper or aluminum material with excellent thermal conductivity.

[0147] The heat pipe (249) transfers heat from the cooling side (242) of the thermoelectric cooling unit to the heat dissipation unit (243) via a 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 gaseous. The gaseous working fluid flows along the heat pipe (249) from the cooling side (242) of the thermoelectric cooling unit to the heat dissipation unit (243), and condenses into a liquid state while releasing heat at the heat dissipation unit (243). The liquid working fluid flows along the heat pipe (249) to the cooling side (242) of the thermoelectric cooling unit.

[0148] During operation of the cooling side (242) of the thermoelectric cooling unit, the heat generated is transferred to the heat dissipation unit (243) via the heat pipe (249). The heat released at the heat dissipation unit (243) is dispersed into the surrounding environment by the wind blowing towards the plurality of heat sinks (248).

[0149] The cold air generated on the cooling side (242) of the thermoelectric cooling section is discharged to the first open side (222) of the tray (220) by the first fan (250). The first fan (250) includes a first blade (253), a first suction port (251), and a first discharge port (252). Then, while the cooling air (CA) flows along the longitudinal direction (L) of the secondary battery (1) from the first open side (222) to the second open side (223) of the tray (220) by the second fan (260), the cooling air (CA) exchanges heat with the secondary battery (1). The second fan (260) includes a second suction port (261), a second blade (262), and a second discharge port (263). The cooled air (CA1) after heat exchange can be discharged by the second fan (260) to the activation chamber (R) located outside the charging space (211).

[0150] The secondary battery charging and discharging device (200) can cool the heat generated during the charging and discharging of the multiple secondary batteries (1) using the above-described structure and operating method. The secondary battery charging and discharging device (200) can eliminate the temperature deviation between the multiple secondary batteries (1) during charging, thereby achieving uniformity in the performance and capacity of the multiple secondary batteries (1).

[0151] In the following text, see references Figure 10 The following will describe a secondary battery charging and discharging device according to a third example of the present invention.

[0152] Figure 10 This is a view used to illustrate the secondary battery charging and discharging device (300) according to the third example of the present invention.

[0153] The secondary battery charging and discharging device (300) according to the third example includes: a chamber (310) having at least one charging space (311, 312); a pair of charging clamps (not shown); temperature sensors (335, 335a); thermoelectric cooling units (340, 340a); a first fan (350, 350a); a second fan (360, 360a); and a third fan (370, 370a). Furthermore, the secondary battery charging and discharging device (300) may include fan covers (380, 380a).

[0154] The temperature sensors (335, 335a), thermoelectric cooling units (340, 340a), first fans (350, 350a), second fans (360, 360a), and third fans (370, 370a) described in the third example have the same structure and function as the temperature sensors (135, 135a), thermoelectric cooling units (140, 140a), first fans (150, 150a), second fans (160, 160a), and third fans (170, 170a) described in the first example above. Therefore, their detailed descriptions will be omitted in this example to avoid repetition.

[0155] The chamber (110) according to the first example, as described above, has a structure in which a power supply unit (115) and a chamber conduit (117) are disposed between two adjacent charging spaces (111, 112); while the chamber (310) according to the third example has a structure in which multiple charging spaces (311, 312) are continuously disposed for each layer.

[0156] The chamber (310) is arranged such that the charging spaces (311, 312) are fluidly connected to the chamber passage of the activation chamber (R). In the chamber (310) according to this example, a power supply unit (315) may be installed on the opposite side of the entrance side of the charging spaces (311, 312), through which the trays (320, 320a) enter the charging spaces (311, 312).

[0157] The power supply unit (315) is electrically connected to a pair of charging clamps (not shown), which are mounted in the charging spaces (311, 312) and located on the rear surface of the charging spaces (311, 312). The arrangement of the pair of charging clamps (not shown) is the same as that in the first example described above.

[0158] The thermoelectric cooling unit (340) cools the air in the charging space (311) to a preset cooling temperature. Cooling air (CA) is blown toward the first open side of the tray (320) by the first fan (350) in a manner parallel to the arrangement direction (W) of the secondary battery (1).

[0159] When the first fan (350) and the second fan (360) are running, cooling air (CA) flows along each gap space (G) between the plurality of secondary batteries. In each gap space (G), the cooling air (CA) flows along the longitudinal direction (L) of the secondary battery from the first open side to the second open side of the tray (320), while simultaneously exchanging heat with the secondary battery (1). The cooled air (CA1) after heat exchange can be discharged through the second fan (360) to the passage (309) of the activation chamber (R) outside the charging space (311).

[0160] When the thermoelectric cooling unit (340) is in operation, the heat generated in the thermoelectric cooling unit (340) can be discharged to the activation chamber (R) outside the charging space (311) through the third fan (370).

[0161] In the following text, reference will be made to Figure 11 and Figure 12 This describes a secondary battery charging and discharging device according to a fourth example of the present invention.

[0162] Figure 11 and Figure 12 This is a view used to illustrate the secondary battery charging and discharging device according to the fourth example of the present invention.

[0163] The secondary battery charging and discharging device (400) according to this example includes: a chamber (410) having at least one charging space (411); a thermoelectric cooling section (440); a temperature sensor (435); a discharge pipe (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) in the first example described above. The chamber (410) has a pair of charging clamps (not shown) installed in each charging space (411) and is arranged to charge and discharge a plurality of secondary batteries (1) in each charging space (411).

[0165] The plurality of secondary batteries (9) are spaced apart and housed in a tray (420) with gap space (G). For example, the secondary battery (9) may be a cylindrical battery cell. The secondary battery (9) is housed upright in the tray (420) such that the positive terminal (8) with a vent is exposed on the upper part of the tray (420).

[0166] In the charging space (411), multiple secondary batteries (9) can be charged simultaneously. In this example, the description of the configuration of the charging clamp (not shown) electrically connected to the multiple secondary batteries (9) and the power supply unit (not shown) supplying power to the charging clamp will be omitted.

[0167] The discharge conduit (450) is installed in each charging space (411) of the chamber (410). The discharge conduit (450) is spaced apart from the upper part of the tray (420). The discharge conduit (450) is connected in fluid communication with the chamber conduit (417).

[0168] A duct fan (459) is installed at the outlet (452) of the discharge duct (450). The duct fan (459) is arranged to discharge hot air (HA) from the duct space (451) into the chamber duct (417).

[0169] A thermoelectric cooling unit (440) is installed in the discharge pipe (450). Reference Figure 11 The thermoelectric cooling section (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 sinks (448) mounted on the heating side (443) of the thermoelectric element (441).

[0170] The thermoelectric cooling unit (440) can be installed in the discharge pipe (450) such that the heat sink (148) is exposed to the pipe space (451) of the discharge pipe (450) and the cooling fin (147) is exposed from the outer surface of the discharge pipe (450) to the charging space (111).

[0171] The thermoelectric cooling unit (440) can be arranged such that the arrangement direction of the heat sink (448) is orthogonal to the arrangement direction of the cooling fins (447). The heat sink (448) can be configured to be parallel to the flow direction of hot air (HA) in the pipe space (451).

[0172] The fan (460) is located at the lower part of the cooling fin (447). The fan (460) draws in cooling air (CA) around the cooling fin (447) and blows it toward the tray (420). As the cooling air (CA) is blown from the top to the bottom of the charging space (411) by the fan (460), the cooling air (CA) flows through the gap space (G) that serves as the space between the plurality of secondary batteries (1).

[0173] Within the gap space (G), cooling air (CA) can dissipate the heat generated during the charging and discharging of each secondary battery (1) while simultaneously exchanging heat with it. The cooling air that exchanges heat as it flows through the gap space (G) can be discharged into the activation chamber (R).

[0174] Multiple heat sinks (448) can be mounted on the heating side (443) of the thermoelectric element (441) orthogonal to the arrangement direction of the multiple cooling fins (447). Multiple heat sinks (448) can be mounted in the pipe space (451) parallel to the longitudinal direction (L) of the discharge pipe (450).

[0175] When the thermoelectric cooling section (440) is in operation, the heating side (443) of the thermoelectric element (441) releases heat at a plurality of heat sinks (448).

[0176] When the duct fan (459) is running, the hot air (HA) around the heat sink (448) is discharged into the chamber duct (417) through the duct fan (459) while flowing along the longitudinal direction (L) of the exhaust duct (450).

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

[0178] The preferred examples of the invention described above are disclosed for illustrative purposes. Those skilled in the art can make various modifications, alterations, and additions within the spirit and scope of the invention, and such modifications, alterations, and additions should be considered to fall within the scope of the appended claims.

[0179] Industrial applicability

[0180] According to a secondary battery charging and discharging device associated with an example of the present invention, the multiple secondary batteries can be uniformly cooled by allowing cooling air to flow into the gap space of a tray in which multiple secondary batteries are contained.

Claims

1. A secondary battery charging and discharging device, comprising: The chamber includes one or more charging spaces capable of individually accommodating a tray containing a secondary battery, and each charging space is provided with a charging clamp arranged to be electrically connected to the secondary battery in the charging space. A thermoelectric cooling unit, comprising a thermoelectric element and a cooling plate, the cooling plate being arranged to transfer cold air from the cooling side of the thermoelectric element to the surrounding environment, and the thermoelectric cooling unit being arranged to cool the air in the charging space at the upper part of the charging space; A first fan is configured to draw cooling air from around the thermoelectric cooling section at the upper part of the charging space and blow the cooling air toward the secondary battery housed in the tray. as well as A second fan is configured to draw air at the lower part of the charging space in a manner parallel to the longitudinal direction of the secondary battery, thereby causing the cooling air to flow along the longitudinal direction of the secondary battery.

2. The secondary battery charging and discharging device according to claim 1, wherein, The first fan is located at the upper part of the first open side of the tray, the first electrode lead of the secondary battery is exposed at the first open side of the tray, and the first fan is arranged to exhaust the cooling air to the first open side of the tray.

3. The secondary battery charging and discharging device according to claim 2, wherein, The first fan includes a first blade, a first suction port, and a first discharge port. The first discharge port is located on a side different from the side where the first suction port is located and is formed into a slit shape. As the first blade rotates, the first fan discharges the cooling air to the first open side through the first discharge port by causing the cooling air to traverse in a direction parallel to the arrangement direction of the secondary battery.

4. The secondary battery charging and discharging device according to claim 3, wherein, The first fan includes a crossflow fan.

5. The secondary battery charging and discharging device according to claim 2, wherein, The second fan is arranged to be in fluid communication with the gap space of the tray through the second open side of the tray, the second electrode lead of the secondary battery is exposed at the second open side of the tray, and the second fan is arranged to draw the cooling air from the first open side to the second open side along the longitudinal direction of the secondary battery.

6. The secondary battery charging and discharging device according to claim 2, wherein, The thermoelectric cooling unit is located on the upper part of one side of the charging space. The first fan is configured to draw cooling air from the area surrounding the thermoelectric cooling section at the upper part of one side of the charging space and blow the cooling air toward one side of the secondary battery housed in the tray; and The second fan is arranged at the lower part on the other side of the charging space to draw air in a manner parallel to the longitudinal direction of the secondary battery.

7. The secondary battery charging and discharging device according to claim 5, wherein, The second fan is positioned diagonally opposite to the first fan along the longitudinal and vertical directions.

8. The secondary battery charging and discharging device according to claim 5, wherein, The second fan is arranged to draw in the cooled air that has undergone heat exchange in the gap space along the longitudinal direction, and to discharge the cooled air that has undergone heat exchange to the outside of the charging space in a direction different from the longitudinal direction.

9. The secondary battery charging and discharging device according to claim 5 further includes: A fan shroud connects the second suction port of the second fan to the second open side of the tray, thereby allowing fluid to move between the second suction port of the second fan and the second open side of the tray. The fan shroud is arranged to direct the airflow of cooled air that has undergone heat exchange in each gap space to the second suction port.

10. The secondary battery charging and discharging device according to claim 9, wherein, The fan cover is configured to be spaced apart from the lower part of the charging clamp that is electrically connected to the secondary battery.

11. The secondary battery charging and discharging device according to claim 1, further comprising: A temperature sensor is arranged in the charging space to sense the temperature of cooling air that has undergone heat exchange with the secondary battery.

12. The secondary battery charging and discharging device according to claim 11, further comprising: A controller that controls the operation of the thermoelectric cooling unit and the first fan based on the temperature information from the temperature sensor.

13. The secondary battery charging and discharging device according to claim 1, wherein, The thermoelectric cooling unit also includes heat sinks, which are arranged to transfer hot air from the heating side of the thermoelectric element to the surrounding environment.

14. The secondary battery charging and discharging device according to claim 13, further comprising: A third fan is installed in the chamber to draw hot air around the heat sink of the thermoelectric cooling unit in the charging space, thereby discharging the hot air to the chamber duct outside the charging space.

15. The secondary battery charging and discharging device according to claim 1, further comprising: A heat dissipation unit, having heat sinks, is mounted outside the charging space. A heat pipe connects the heat dissipation section and the thermoelectric cooling section, and is arranged to transfer heat from the thermoelectric cooling section to the heat dissipation section.

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