Battery charging device and battery formation system including same

Abstract

A battery charging device according to the present invention comprises: a current supply circuit configured to supply a charging current through a plurality of conducting wires respectively corresponding to a plurality of batteries; and a charging jig configured to support the plurality of batteries and provide a charging current supplied through the plurality of conducting wires to the plurality of batteries. The charging jig comprises: a plurality of connection pins electrically connecting the plurality of conducting wires to first electrode terminals of the plurality of batteries; a conductive plate commonly in contact with second electrode terminals of the plurality of batteries to allow the second electrode terminals to have the same potential; and a cooling structure having a cooling channel through which a cooling material moves and configured to cool the conductive plate.

Description

Battery charging device and battery formation system including the same

[0001] This application claims priority from Korean Patent Application No. 10-2024-0090752, filed on July 9, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a battery charging device and a battery formation system including the same, and more particularly, to a battery charging device for charging a plurality of rechargeable batteries, and a battery formation system for activating a battery manufactured using the battery charging device.

[0003] In general, a secondary battery refers to a battery that can be repeatedly charged and discharged, such as a lithium-ion battery, a lithium polymer battery, a nickel-cadmium battery, a nickel-hydrogen battery, or a nickel-zinc battery.

[0004] Recently, as batteries are applied to not only small devices such as mobile phones, tablet PCs, and laptops, but also large devices such as electric vehicles and ESS (Energy Storage Systems) that require high output voltage and large charging capacity, interest in and demand for battery manufacturing technologies that can improve manufacturing efficiency and safety of the manufacturing process are increasing.

[0005] Meanwhile, the battery manufacturing process includes an electrode process, an assembly process, and a formation process. The electrode process is a process for manufacturing the positive electrode and negative electrode applied to the battery. The assembly process is a process for placing an electrode assembly in which the positive and negative electrodes are laminated with a separator in between, and an electrolyte material into a case, and sealing the case. The formation process is a process for activating the assembled battery by repeatedly charging and discharging the assembled battery, and performing aging of the activated battery. Among these various processes, a charger is used in the formation process to charge the assembled battery.

[0006] However, existing technologies require a lot of cost to manufacture chargers because they use chargers with complex electrical connection structures to simultaneously charge multiple batteries, and there is a problem in that it is difficult to place a cooling structure that cools the electrical connection structure of the charger inside the charger.

[0007] As a result, existing technologies have problems in that cooling efficiency is low because they use a blower fan to reduce the internal temperature of the charger, and they cannot prevent overheating of the connecting member that is in direct contact with the electrode terminal of the battery to be charged and actually generates the most heat.

[0008] The technical problem to be solved by the present invention is to provide a battery charging device having a simplified electrical connection structure, reduced manufacturing cost, and an easily arranged cooling structure, and a battery formation system including the battery charging device.

[0009] In addition, another technical problem to be solved by the present invention is to provide a battery charging device capable of preventing overheating of a connecting member that directly contacts an electrode terminal of a battery to be charged and improving the safety of a battery charging process, and a battery formation system including such a battery charging device.

[0010] Furthermore, those skilled in the art will readily understand from the following description that various embodiments of the present invention can solve various technical problems not mentioned above.

[0011] According to one aspect of the present invention, a battery charging device is a device for charging a plurality of batteries, each of which has a first electrode terminal and a second electrode terminal, the device comprising: a current supply circuit configured to supply a charging current through a plurality of conducting wires corresponding to each of the plurality of batteries; and a charging jig configured to support the plurality of batteries and provide the charging current supplied through the plurality of conducting wires to the plurality of batteries, wherein the charging jig comprises: a plurality of connecting pins electrically connecting the plurality of conducting wires to first electrode terminals of the plurality of batteries; a conductive plate that is in common contact with the second electrode terminals of the plurality of batteries so that the second electrode terminals have the same potential; and a cooling structure having a cooling channel through which a cooling substance moves and configured to cool the conductive plate.

[0012] In one embodiment, the current supply circuit and the conductive plate of the charging jig may be configured to be connected to a common ground.

[0013] In one embodiment, the battery charging device further includes an enclosure that accommodates the current supply circuit and the charging jig, and the current supply circuit and the conductive plate may be configured to use the enclosure as the common ground.

[0014] In one embodiment, the housing may include a conductive layer and an insulating layer that are laminated with each other, and the current supply circuit and the conductive plate may be configured to be connected to the conductive layer of the housing.

[0015] In one embodiment, the conductive plate has a first contact surface with which the second electrode terminals of the plurality of batteries are in common contact, and a second contact surface with which the cooling structure is in contact, and the first contact surface may have a plurality of mounting grooves in which the plurality of batteries are respectively mounted.

[0016] In one embodiment, the conductive plate is made of a metal plate, and the plurality of seating grooves can be formed by bending or folding a plurality of portions of the metal plate.

[0017] In one embodiment, the device may further include a fastening member that mutually couples the conductive plate and the cooling structure.

[0018] In one embodiment, the conductive plate may have a through hole, and the fastening member may include a fastening rod having an outer surface with a thread formed thereon, one end of which is fixed to the cooling structure and the other end of which passes through the through hole of the conductive plate and is positioned outside the through hole; and a nut screwed to the other end of the fastening rod.

[0019] In another embodiment, the conductive plate and the cooling structure may be formed integrally.

[0020] In one embodiment, the first electrode terminal may be a positive terminal, and the second electrode terminal may be a negative terminal.

[0021] In one embodiment, the battery charging device may further include a chiller configured to provide the cooling material to the cooling channel of the cooling structure and cool the cooling material discharged from the cooling channel.

[0022] A battery formation system according to another aspect of the present invention includes the battery charging device described above.

[0023] According to the present invention, a charging jig of a battery charging device for charging a plurality of batteries is configured to electrically connect the plurality of batteries to a current supply circuit using a conductive plate that is in common contact with electrode terminals of the plurality of batteries, thereby simplifying the electrical connection structure of the battery charging device, reducing manufacturing costs, and facilitating the arrangement of a cooling structure for cooling the battery charging device.

[0024] In addition, a cooling structure having a cooling channel through which a cooling material moves is configured to cool the conductive plate, thereby preventing overheating of the conductive plate in direct contact with the electrode terminal of the battery to be charged, and improving the safety of the battery charging process.

[0025] In addition, since the current supply circuit that provides the charging current and the conductive plate are configured to use the outer case of the battery charging device as a common ground, the amount of cable used in the battery charging device can be reduced, and as a result, heat, line resistance, parasitic reactance, etc. generated when using the cable can be reduced, and the charging voltage and charging current can be stabilized.

[0026] Furthermore, those skilled in the art will readily understand from the following description that various embodiments of the present invention can provide various technical advantages not mentioned above.

[0027] FIG. 1 is a block diagram showing a battery charging device according to one embodiment of the present invention.

[0028] Figure 2 is a perspective view showing an example of a rechargeable battery according to the present invention.

[0029] Figure 3 is a cross-sectional view of the battery illustrated in Figure 2.

[0030] FIG. 4 is a drawing schematically showing an electrical connection relationship between a current supply circuit and a charging jig of a battery charging device according to one embodiment of the present invention.

[0031] FIG. 5 is a perspective view showing a state in which a conductive plate and a cooling structure of a battery charging device according to a modified embodiment are mutually coupled.

[0032] Fig. 6 is an exploded perspective view showing the conductive plate and cooling structure shown in Fig. 5 separated.

[0033] FIG. 7 is a perspective view showing a conductive plate and a cooling structure according to another modified embodiment.

[0034] FIG. 8 is a drawing showing the internal structure of a battery charging device according to one embodiment of the present invention.

[0035] Figure 9 is an enlarged view showing part A1 of Figure 8.

[0036] FIG. 10 is a block diagram illustrating a battery formation system according to one embodiment of the present invention.

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings to clarify solutions corresponding to the technical challenges of the present invention. However, when describing the present invention, descriptions of related known technologies may be omitted if they obscure the gist of the present invention. Furthermore, the terms used in this specification are defined in consideration of their functions in the present invention, and these may vary depending on the intentions or practices of designers, manufacturers, etc. Therefore, the definitions of terms described below should be based on the contents throughout this specification.

[0038] FIG. 1 is a block diagram showing a battery charging device (100) according to one embodiment of the present invention.

[0039] As illustrated in FIG. 1, a battery charging device (100) according to the present invention is configured to receive power from an external power source (2) and charge a plurality of batteries. To this end, the battery charging device (100) includes a current supply circuit (110) and a charging jig (120).

[0040] The current supply circuit (110) is configured to supply charging current to a plurality of batteries through a plurality of conductors, each corresponding to a plurality of batteries. For example, the current supply circuit (110) may convert power transmitted from a power source (2) to generate charging current and supply the charging current to a charging jig (120) described below. To this end, the current supply circuit (110) may include at least one of an AC-DC converter and a DC-DC converter.

[0041] The above charging jig (120) supports the plurality of batteries and is configured to provide charging current supplied through a plurality of conductors to the plurality of batteries.

[0042] As will be described again below, the charging jig (120) includes a plurality of connecting pins, a conductive plate, and a cooling structure.

[0043] The plurality of connecting pins are configured to electrically connect a plurality of conductors corresponding to the plurality of batteries, respectively, to the first electrode terminals of the plurality of batteries.

[0044] The conductive plate is configured to be in common contact with the second electrode terminals of the plurality of batteries. The conductive plate in contact with the second electrode terminals causes the second electrode terminals to have the same potential.

[0045] The above cooling structure has a cooling channel through which a cooling material moves and is configured to cool the conductive plate.

[0046] In one embodiment, the battery charging device (100) may further include an enclosure (130) that accommodates a current supply circuit (110) and a charging jig (120). The enclosure (130) may be made of a metal plate.

[0047] In one embodiment, the battery charging device (100) may further include a chiller (140) that provides a cooling substance to the cooling structure of the charging jig (120) and collects and cools the cooling substance discharged from the cooling structure. In this case, the chiller (140) may be placed outside the outer case (130). In addition, the cooling substance may be coolant, or a refrigerant such as hydro-fluoro-olefin (HFO), hydro-fluoro-carbon (HFC), or chloro-fluoro-carbon (CFC).

[0048] Figure 2 is a perspective view showing an example of a rechargeable battery according to the present invention.

[0049] As illustrated in FIG. 2, a battery charging device (100) according to the present invention can charge a battery (20) having a first electrode terminal and a second electrode terminal that are positioned spaced apart from each other. The first electrode terminal may be a positive terminal, and the second electrode terminal may be a negative terminal.

[0050] Although a cylindrical battery is illustrated in FIG. 2, it is to be understood that the battery charging device (100) according to the present invention may be configured to charge other types of batteries, such as pouch-type batteries, square batteries, etc.

[0051] The above battery (20) has a cylindrical case (22) forming an outer body. This case (22) has an upper surface (22a) and a lower surface (22b), and a rivet (24a) that functions as a first electrode terminal may be provided at the center of the upper surface (22a). In addition, an insulation gasket (26) may be provided between the upper surface (22a) of the case (22) and the rivet (24a).

[0052] The lower surface (22b) of the case (22) may be configured to perform the function of a second electrode terminal. In this case, the first electrode terminal may be a positive terminal, and the second electrode terminal may be a negative terminal.

[0053] Figure 3 is a cross-sectional view of the battery (20) illustrated in Figure 2.

[0054] As illustrated in FIG. 3, the case (22) of the battery (20) accommodates an electrode assembly (24) and an electrolyte material. The electrode assembly (24) has a laminated structure in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween. For example, the electrode assembly (24) may have a jelly-roll shape. In this case, a hollow space (H1) may be formed in the center of the electrode assembly (24).

[0055] Additionally, the lower surface (22b) of the case (22) may be provided with a venting structure (22c) configured to discharge gas generated inside the battery (20).

[0056] An insulator (28) may be placed between the upper bare portion of the electrode assembly (24) electrically connected to the rivet (24a) and the upper surface (22a) of the case (22).

[0057] The battery (20) assembled in this way can be activated by repeating charging and discharging.

[0058] FIG. 4 is a drawing schematically showing an electrical connection relationship between a current supply circuit (110) and a charging jig (120) of a battery charging device according to one embodiment of the present invention.

[0059] As illustrated in FIG. 4, the current supply circuit (110) is configured to supply charging current through a plurality of conductors corresponding to a plurality of batteries (20), respectively. To this end, the current supply circuit (110) may be provided with a plurality of terminal pairs (112, 114) corresponding to a plurality of batteries (20), respectively. Each terminal pair may include a first circuit terminal (112) corresponding to a first electrode terminal of a corresponding battery, and a second circuit terminal (114) corresponding to a second electrode terminal of the corresponding battery.

[0060] This current supply circuit (110) can convert power transmitted from a power source (2) to generate a charging current and supply the charging current to a charging jig (120).

[0061] The charging jig (120) supports the plurality of batteries (20) and can provide charging current supplied through a plurality of conductors to the plurality of batteries (20). To this end, the charging jig (120) includes a plurality of connecting pins (122), a conductive plate (126), and a cooling structure (128).

[0062] The above plurality of connecting pins (122) are configured to electrically connect a plurality of conductors corresponding to each of the plurality of batteries (20) to the first electrode terminals of the plurality of batteries (20).

[0063] In one embodiment, the charging jig (120) may further include a support structure (124) that supports the plurality of connection pins (122). In this case, the support structure (124) may be configured to contact each connection pin (122) to a first electrode terminal of a corresponding battery.

[0064] The conductive plate (126) is configured to be in common contact with the second electrode terminals of the plurality of batteries (20). The conductive plate (126) in contact with the second electrode terminals causes the second electrode terminals to have the same potential.

[0065] In one embodiment, the first electrode terminal of each battery (20) may be a positive electrode terminal, and the second electrode terminal may be a negative electrode terminal.

[0066] The cooling structure (128) has a cooling channel (128a) through which a cooling substance moves and is configured to contact a conductive plate (126) to cool the conductive plate (126). The chiller (140) described with reference to FIG. 1 can provide a cooling substance to the cooling channel (128a) of the cooling structure (128) and cool the cooling substance discharged from the cooling channel (128a) again.

[0067] In one embodiment, the conductive plate (126) and cooling structure (128) of the charging jig (120) may be formed integrally.

[0068] Meanwhile, the current supply circuit (110) and the conductive plate (126) of the charging jig (120) may be configured to be connected to a common ground (CG). As will be described again below, the current supply circuit (110) and the conductive plate (126) may be configured to use the aforementioned enclosure (130) as a common ground.

[0069] FIG. 5 is a perspective view showing a state in which a conductive plate (126') and a cooling structure (128') of a battery charging device according to a modified embodiment are mutually coupled.

[0070] As illustrated in FIG. 5, the conductive plate (126') may have a first contact surface to which the second electrode terminals of a plurality of batteries are in common contact. The first contact surface of the conductive plate (126') may have a plurality of mounting grooves (126'a) in which the plurality of batteries are respectively mounted.

[0071] Additionally, the conductive plate (126') may have a second contact surface with which a cooling structure (128') comes into contact. The cooling structure (128') may come into contact with the conductive plate (126') and cool the conductive plate (126').

[0072] In this case, the cooling structure (128') may have a plate shape corresponding to the conductive plate (126'). In addition, as described with reference to FIG. 4, the cooling structure (128') may be provided with a cooling channel therein that provides a movement path of a cooling substance. This cooling structure (128') may be provided with an inlet (128'b) through which the cooling substance is introduced, and an outlet (128'c) through which the cooling substance is discharged.

[0073] As described with reference to FIG. 1, the chiller (140) of the battery charging device (100) can inject a cooling substance cooled to a predetermined temperature or lower into the inlet (128'b) of the cooling structure (128'), and collect the cooling substance discharged from the outlet (128'c) of the cooling structure (128) and cool it again.

[0074] Meanwhile, the battery charging device (100) may include a fastening member (129) that mutually connects the conductive plate (126') and the cooling structure (128').

[0075] Fig. 6 is an exploded perspective view showing the conductive plate (126') and cooling structure (128') illustrated in Fig. 5 separated.

[0076] As illustrated in Fig. 6, the conductive plate (126') may have a plurality of through holes (126'b). In addition, the fastening member (129) that mutually connects the conductive plate (126') and the cooling structure (128') may include a fastening rod (129a) and a nut (129b).

[0077] The above-mentioned fastening rod (129a) has an outer surface with a thread formed thereon, and one end thereof is fixed to a cooling structure (128'), and the other end thereof can be configured to pass through a through hole (126'b) of a conductive plate (126') and be located outside of the through hole (126'b), i.e., above the through hole (126'b).

[0078] The above nut (129b) can be configured to be screw-connected to the other end of the fastening rod (129a) located at the upper portion of the through hole (126'b) by passing through the through hole (126b').

[0079] In one embodiment, the conductive plate (126') may be manufactured from a metal plate. In addition, the plurality of seating grooves (126'a) of the conductive plate (126') may be formed by bending or folding a plurality of portions of the metal plate. For example, the plurality of seating grooves (126'a) may be formed through a press process or a deep drawing process.

[0080] In this case, on the bottom surface (second contact surface) of the conductive plate (126'), which is opposite to the top surface (first contact surface) of the conductive plate (126') on which the plurality of settling grooves (126'a) are formed, a plurality of protrusions corresponding to the plurality of settling grooves (126'a) are formed. In order to increase the contact area between the conductive plate (126') and the cooling structure (128'), a plurality of insertion grooves (128'd), into which the plurality of protrusions are respectively inserted and fitted, may be provided on the top surface of the cooling structure (128') that contacts the bottom surface (second contact surface) of the conductive plate (126').

[0081] FIG. 7 is a perspective view showing a conductive plate (126") and a cooling structure (128") according to another modified embodiment.

[0082] As illustrated in FIG. 7, the conductive plate (126") and the cooling structure (128") may be formed integrally. In this case, a plurality of mounting grooves (126"a) in which batteries to be charged are mounted may be provided on the upper surface of the conductive plate (126").

[0083] In addition, the cooling structure (128") formed integrally with the conductive plate (126") may have an inlet (128"b) through which a cooling substance is introduced, and an outlet (128"c) through which a cooling substance that has moved along a cooling channel provided inside the cooling structure (128") is discharged.

[0084] In this way, when the conductive plate (126") and the cooling structure (128") are formed integrally, the fastening member (129) described with reference to FIGS. 5 and 6 is omitted.

[0085] FIG. 8 is a drawing showing the internal structure of a battery charging device (100) according to one embodiment of the present invention.

[0086] As illustrated in FIG. 8, a battery charging device (100) according to one embodiment of the present invention may further include an outer case (130) that accommodates the above-described current supply circuit (110) and charging jig (120). This outer case (130) may be manufactured from a metal plate.

[0087] The current supply circuit (110) housed inside the outer case (130) can supply the charging current required to charge a plurality of batteries (20) using power provided from an external power source. To this end, the current supply circuit (110) can include a main circuit (110a) and a plurality of channel circuits (110b).

[0088] In this case, the main circuit (110a) may be configured to primarily convert power provided from an external power source. For example, the main circuit (110a) may be configured to rectify and compress power provided from an external power source and transmit it to a plurality of channel circuits (110b). To this end, the main circuit (110a) may include at least one of an AC-DC converter and a DC-DC converter.

[0089] Additionally, each channel circuit (110b) may be configured to secondary convert the power transmitted from the main circuit (110a). For example, each channel circuit (110b) may be configured to appropriately convert the DC power transmitted from the main circuit (110a) to generate a charging current and supply the charging current to one or more batteries (20). For this purpose, the channel circuit (110b) may include a DC-DC converter.

[0090] The current supply circuit (110) is configured to supply a charging current required for charging a plurality of batteries (20) through a plurality of conductors, and to supply a charging current through a plurality of conductors corresponding to each of the plurality of batteries. For example, the current supply circuit (110) may convert power transmitted from a power source (2) to generate a charging current, and supply the charging current to a charging jig (120) described below. To this end, the current supply circuit (110) may include at least one of an AC / DC converter and a DC / DC converter.

[0091] The charging jig (120) supports the plurality of batteries (20) and is configured to provide charging current supplied from the current supply circuit (110) to the plurality of batteries (20).

[0092] As mentioned above, the current supply circuit (110) and the conductive plates (126, 126', 126") of the charging jig (120) described above may be configured to be connected to a common ground (CG). In this case, the current supply circuit (110) and the conductive plates (126, 126', 126") may be configured to use the enclosure (130) as a common ground.

[0093] Figure 9 is an enlarged view showing part A1 of Figure 8.

[0094] As illustrated in FIG. 9, the outer case (130) may be manufactured from a metal plate coated with an insulating material. As a result, the outer case (130) may include a conductive layer (132) and an insulating layer (134, 136) that are laminated with each other. In this case, the current supply circuit (110) and the conductive plates (126, 126', 126") may be configured to be connected to the conductive layer (132) of the outer case (130).

[0095] FIG. 10 is a block diagram showing a battery formation system (10) according to one embodiment of the present invention.

[0096] As illustrated in FIG. 10, a battery formation system (10) according to one embodiment of the present invention may include the battery charging device (100) described above. This battery formation system (10) may charge batteries using the battery charging device (100) described above or activate the batteries by repeating charging and discharging.

[0097] In one embodiment, the battery formation system (10) according to the present invention may further include an aging device (200). The aging device (200) may be configured to optimize the electrochemical state of activated batteries by storing them in an environment with a predetermined temperature and / or humidity for a predetermined period of time. To this end, the aging device (200) may include a chamber for accommodating the batteries and a control device for controlling the temperature and / or humidity of the chamber.

[0098] As described above, according to the present invention, a charging jig of a battery charging device for charging a plurality of batteries is configured to electrically connect the plurality of batteries to a current supply circuit using a conductive plate that is in common contact with electrode terminals of the plurality of batteries, thereby simplifying the electrical connection structure of the battery charging device, reducing manufacturing costs, and facilitating the arrangement of a cooling structure for cooling the battery charging device.

[0099] In addition, a cooling structure having a cooling channel through which a cooling material moves is configured to cool the conductive plate, thereby preventing overheating of the conductive plate in direct contact with the electrode terminal of the battery to be charged, and improving the safety of the battery charging process.

[0100] In addition, since the current supply circuit that provides the charging current and the conductive plate are configured to use the outer case of the battery charging device as a common ground, the amount of cable used in the battery charging device can be reduced, and as a result, heat, line resistance, parasitic reactance, etc. generated when using the cable can be reduced, and the charging voltage and charging current can be stabilized.

[0101] Furthermore, it goes without saying that embodiments according to the present invention can solve various technical problems other than those mentioned throughout this specification, not only in the relevant technical field but also in related technical fields.

[0102] The present invention has been described with reference to specific embodiments. However, those skilled in the art will clearly understand that various modifications can be implemented within the technical scope of the present invention. Therefore, the embodiments disclosed above should be considered illustrative rather than limiting. In other words, the true scope of the present invention is set forth in the claims, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

[0103] [Explanation of symbols]

[0104] 10: Battery formation system

[0105] 100: Battery charging device

[0106] 110: Current supply circuit

[0107] 112: First circuit terminal

[0108] 114: Second circuit terminal

[0109] 120: Charging jig

[0110] 122: Connecting pin

[0111] 124: Support structure

[0112] 126, 126', 126": Conductive Plate

[0113] 128, 128', 128": Cooling structure

[0114] 129: Absence of a binding

[0115] 130: Outer case

[0116] 140: Chiller

Claims

1. A battery charging device for charging a plurality of batteries, each having a first electrode terminal and a second electrode terminal, A current supply circuit configured to supply charging current through a plurality of conductors corresponding to each of the plurality of batteries; and A charging jig configured to support the plurality of batteries and provide charging current supplied through the plurality of conductors to the plurality of batteries, The above charging jig is, A plurality of connecting pins electrically connecting the plurality of conductors to the first electrode terminals of the plurality of batteries; A conductive plate that is in common contact with the second electrode terminals of the plurality of batteries so that the second electrode terminals have the same potential; and A battery charging device comprising a cooling structure having a cooling channel through which a cooling material moves and configured to cool the conductive plate.

2. In paragraph 1, A battery charging device, characterized in that the conductive plate of the current supply circuit and the charging jig are configured to be connected to a common ground.

3. In paragraph 2, The battery charging device further includes an enclosure that accommodates the current supply circuit and the charging jig, A battery charging device characterized in that the current supply circuit and the conductive plate are configured to use the housing as the common ground.

4. In paragraph 3, The above-mentioned case includes a conductive layer and an insulating layer laminated with each other, A battery charging device characterized in that the current supply circuit and the conductive plate are configured to be connected to the conductive layer of the outer case.

5. In paragraph 1, The conductive plate has a first contact surface with which the second electrode terminals of the plurality of batteries are in common contact, and a second contact surface with which the cooling structure is in contact, A battery charging device, characterized in that the first contact surface has a plurality of mounting grooves in which the plurality of batteries are each mounted.

6. In paragraph 5, The above conductive plate is manufactured from a metal plate, A battery charging device characterized in that the plurality of fixing grooves are formed by bending or folding a plurality of parts of the metal plate.

7. In paragraph 1, A battery charging device further comprising a fastening member that mutually connects the conductive plate and the cooling structure.

8. In paragraph 7, The above conductive plate has a through hole, The above fastening member is, A fastening rod having an outer surface formed with threads, one end of which is fixed to the cooling structure and the other end of which passes through a through hole of the conductive plate and is located outside the through hole; and A battery charging device characterized by including a nut screwed to the other end of the above-mentioned fastening rod.

9. In paragraph 1, A battery charging device, characterized in that the conductive plate and the cooling structure are formed integrally.

10. In paragraph 1, The above first electrode terminal is a positive terminal, A battery charging device, characterized in that the second electrode terminal is a negative terminal.

11. In paragraph 1, A battery charging device characterized in that it further includes a chiller configured to provide the cooling material to the cooling channel of the cooling structure and cool the cooling material discharged from the cooling channel.

12. A battery formation system comprising a battery charging device according to any one of claims 1 to 11.

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