Charging / discharging device

Abstract

The charging and discharging device according to the present disclosure comprises: a plurality of external terminals including a first external terminal and a second external terminal for charging or discharging a battery cell; a first connection terminal electrically connected to the first external terminal; a bus bar electrically connected to the second external terminal; a second connection terminal spaced apart from the first connection terminal in a first horizontal direction and electrically connected to the second external terminal; and a third connection terminal spaced apart from the first connection terminal in a second horizontal direction perpendicular to the first horizontal direction, and electrically connected to the second external terminal through the bus bar.

Description

Technical Field

[0001] The present disclosure relates to a battery, and more particularly, to a charging and discharging device. Background Art

[0002] During the manufacturing process of a battery, formation processes are performed. The formation process is a process of repeatedly charging and discharging a battery cell multiple times to endow the battery cell with electrical characteristics. A charging and discharging device can perform the formation process. Battery cells can be manufactured in various specifications. Summary of the Invention

[0003] (I) Technical Problem to be Solved

[0004] An object of the present disclosure is to provide a charging and discharging device that can be compatible with battery cells of various specifications.

[0005] The present disclosure can be applied to green technology fields such as solar power generation and wind power generation. In addition, the present disclosure can be directly or indirectly applied to environmental protection devices such as electric vehicles and hybrid vehicles that prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0006] (II) Technical Solution

[0007] A charging and discharging device according to an embodiment of the present disclosure includes: a plurality of external terminals including a first external terminal and a second external terminal for charging or discharging a battery cell; a first connection terminal electrically connected to the first external terminal; a bus bar electrically connected to the second external terminal; a second connection terminal spaced apart from the first connection terminal in a first horizontal direction and electrically connected to the second external terminal; and a third connection terminal spaced apart from the first connection terminal in a second horizontal direction perpendicular to the first horizontal direction and electrically connected to the second external terminal through the bus bar.

[0008] In an embodiment, the first connection terminal may be electrically connected to a first electrode tab of the battery cell, and one of the second connection terminal and the third connection terminal may be electrically connected to a second electrode tab of the battery cell.

[0009] In an embodiment, when the first electrode tab and the second electrode tab protrude in the same direction, the second connection terminal may be electrically connected to the second electrode tab.

[0010] In an embodiment, when the first electrode tab and the second electrode tab protrude in opposite directions, the third connection terminal may be electrically connected to the second electrode tab.

[0011] In an embodiment, it may further include: a guide rail provided below the third connection terminal, and the third connection terminal can move along the second horizontal direction through the guide rail.

[0012] In an embodiment, the distance between the third connection terminal and the first connection terminal may be greater than the body length of the battery cell.

[0013] In an embodiment, it may further include: a base plate disposed below the plurality of external terminals, the first connection terminal, the second connection terminal, and the third connection terminal, and at least a part of the bus bar may be disposed below the base plate.

[0014] In an embodiment, the base plate may include an opening formed such that at least a part of the upper portion of the bus bar is exposed, and the opening may be located in a region between the third connection terminal and the first connection terminal.

[0015] In an embodiment, it may further include: a bus bar cover disposed between the first connection terminal and the third connection terminal, and the body of the battery cell is disposed on the bus bar cover.

[0016] In an embodiment, the bus bar cover may include: a cover member whose length is adjusted when the third connection terminal moves along the second horizontal direction; and a receiving portion that receives at least a part of the cover member.

[0017] In an embodiment, the receiving portion may include: a rotating shaft that winds or unwinds the cover member;

[0018] a latch coupled to the rotating shaft; a rod that prevents the latch from rotating in the winding direction of the cover member in the clockwise and counterclockwise directions; and a switch that moves the rod away from the latch to wind the cover member.

[0019] In an embodiment, the receiving portion may include: a spring member coupled to one end of the cover member, and the spring member winds the cover member by a restoring force after the cover member is unwound; a rod that contacts the cover member to prevent the cover member from winding; and a switch that moves the rod away from the cover member to wind the cover member by the spring member.

[0020] In an embodiment, at least one of the first connection terminal and the second connection terminal may include: a pressing portion disposed above a corresponding electrode tab of the first electrode tab and the second electrode tab of the battery cell that protrude in the same direction; a connection portion disposed below the corresponding electrode tab and electrically connected to a corresponding external terminal of the first external terminal and the second external terminal; and an adjusting portion that adjusts the height of the pressing portion so that the pressing portion presses the upper portion of the corresponding electrode tab, thereby electrically connecting the corresponding electrode tab to the connection portion.

[0021] In an embodiment, the third connection terminal may include: a pressing part disposed on an upper portion of a second electrode tab among the first electrode tab and the second electrode tab of the battery cell protruding in different directions; a connecting part disposed on a lower portion of the second electrode tab; and an adjusting part that adjusts a height of the pressing part to press the upper portion of the second electrode tab, so that the second electrode tab is electrically connected to the bus bar through the connecting part.

[0022] In an embodiment, the third connection terminal may further include an elastic member connected between the pressing part and the connecting part.

[0023] In an embodiment, the connecting part may be in a state of being separated from the bus bar or a state of being in contact with the bus bar according to an adjustment of the adjusting part.

[0024] (III) Advantageous Effects

[0025] Embodiments of the present disclosure may provide a charging and discharging device capable of being compatible with battery cells of various specifications.

[0026] Embodiments of the present disclosure may provide a charging and discharging device capable of protecting a bus bar. Description of the Drawings

[0027] Figure 1 is a block diagram for explaining a charging and discharging device according to an embodiment.

[0028] Figure 2 is a diagram for explaining a charging and discharging device according to an embodiment.

[0029] Figure 3 is for explaining separation from Figure 2 a state of separating a bus bar cover from the charging and discharging device.

[0030] Figure 4 is a diagram for explaining a cross-section of a charging and discharging device according to an embodiment.

[0031] Figure 5 is a diagram showing a state in which a charging and discharging device according to an embodiment is combined with a first type of battery cell.

[0032] Figure 6 is a diagram showing a state in which a third connection terminal according to an embodiment moves.

[0033] Figure 7 is a diagram showing a state in which a charging and discharging device according to an embodiment is combined with a first type of battery cell.

[0034] Figure 8It is a diagram showing the state in which a charge-discharge device according to an embodiment is combined with a second type of battery cell.

[0035] Figure 9 It is a diagram for explaining the connection terminals of a charge-discharge device according to an embodiment.

[0036] Figure 10 It is a diagram for explaining the connection terminals of a charge-discharge device according to an embodiment.

[0037] Figure 11 It is a diagram for explaining the bus bar cover of a charge-discharge device according to an embodiment.

[0038] Explanation of reference numerals:

[0039] 100: Charge-discharge device

[0040] 110: Base plate

[0041] 120a, 120b: External terminals

[0042] 130a, 130b, 130c: Connection terminals

[0043] 140: Bus bar

[0044] 150: Guide rail

[0045] 160: Bus bar cover

[0046] 200: Battery cell Detailed implementation manners

[0047] The description of the structure or function of the embodiments disclosed in this specification or application is only for the purpose of illustrating the embodiments according to the technical idea of the present invention, and the embodiments according to the technical idea of the present invention can also be implemented in various forms other than the embodiments disclosed in this specification or application, and the technical idea of the present invention should not be construed as being limited to the embodiments described in this specification or application.

[0048] Figure 1 It is a block diagram for explaining a charge-discharge device according to an embodiment.

[0049] Referring to Figure 1 , the charge-discharge device 100 according to an embodiment can charge or discharge a battery cell. For example, the charge-discharge device 100 can be a device for a formation process that activates or evaluates the electrical characteristics of a battery cell in the manufacturing process of the battery cell.

[0050] The battery cell can be a secondary battery capable of charging and discharging electrical energy multiple times. For example, the secondary battery can be one of various types such as a lithium-ion battery, a lithium polymer battery, a nickel-metal hydride battery, a nickel-cadmium battery, a sodium battery, etc. The battery cell can include a main body and a pair of electrode tabs. The pair of electrode tabs can include a first electrode tab and a second electrode tab. The first electrode tab and the second electrode tab can be electrode tabs of different polarities. For example, the first electrode tab can be a positive electrode tab and the second electrode tab can be a negative electrode tab. Alternatively, the first electrode tab can be a negative electrode tab and the second electrode tab can be a positive electrode tab.

[0051] In an embodiment, the charge and discharge device 100 can include a plurality of external terminals 120a, 120b, a plurality of connection terminals 130a - 130c, and a bus bar 140. In an embodiment, the charge and discharge device 100 can include a charge and discharge module. The charge and discharge module can be electrically connected to the plurality of external terminals 120a, 120b. The charge and discharge module can charge or discharge the electrically connected battery cell through the plurality of external terminals 120a, 120b. For example, the charge and discharge module can supply an alternating current (or direct current) for charging or discharging to the battery cell through the plurality of external terminals 120a, 120b.

[0052] The plurality of external terminals 120a, 120b can include a first external terminal 120a and a second external terminal 120b for charging or discharging the battery cell. Each of the plurality of external terminals 120a, 120b can include a conductive material. For example, the conductive material can be one or a combination of copper, gold, and silver. However, this is only one embodiment, and the conductive material can be implemented with various materials as long as it has a conductivity above a predetermined value.

[0053] The plurality of connection terminals 130a - 130c can include a first connection terminal 130a, a second connection terminal 130b, and a third connection terminal 130c. The first connection terminal 130a can be electrically connected to the first external terminal 120a. The second connection terminal 130b can be electrically connected to the second external terminal 120b. The third connection terminal 130c can be electrically connected to the bus bar 140. Each of the plurality of connection terminals 130a - 130c can include a conductive material.

[0054] The first connection terminal 130a can be electrically connected to the first electrode tab of the battery cell. In this case, the first electrode tab of the battery cell can be electrically connected to the first external terminal 120a through the first connection terminal 130a.

[0055] One of the second connection terminal 130b and the third connection terminal 130c can be electrically connected to the second electrode tab of the battery cell. That is, the second electrode tab of the battery cell can be selectively connected to one of the second connection terminal 130b and the third connection terminal 130c. In this case, the second electrode tab of the battery cell can be electrically connected to the second external terminal 120b through one of the second connection terminal 130b and the third connection terminal 130c.

[0056] The bus bar 140 can be electrically connected to the second external terminal 120b. That is, the third connection terminal 130c can be electrically connected to the second external terminal 120b through the bus bar 140. For example, the second electrode tab of the battery cell can be electrically connected to the second external terminal 120b through the third connection terminal 130c and the bus bar 140. The bus bar 140 can include a conductive material.

[0057] Figure 2 is a diagram for explaining a charge-discharge device according to an embodiment. Figure 3 is for explaining from Figure 2 the state of separating the bus bar cover from the charge-discharge device. Figure 4 is a diagram for explaining a cross-section of a charge-discharge device according to an embodiment. Figure 4 100-A1, 100-B1, 100-C1 of Figure 2 successively show the cross-sections of parts A1, B1, C1 of

[0058] Referring to Figures 2 to 4 , the charge-discharge device 100 according to an embodiment can include a plurality of external terminals 120a, 120b, a plurality of connection terminals 130a to 130c, and a bus bar 140. In an embodiment, the charge-discharge device 100 can further include at least one of a base plate 110, a guide rail 150, and a bus bar cover 160.

[0059] The base plate 110 can fix and support the components of the charge-discharge device 100. In an embodiment, the base plate 110 can include an insulating material. For example, the insulating material can be a material having electrical insulation properties and can be a material with a conductivity below a reference value.

[0060] The plurality of external terminals 120a, 120b and the plurality of connection terminals 130a to 130c can be disposed on the upper portion of the base plate 110. That is, the base plate 110 can be disposed below the plurality of external terminals 120a, 120b and the plurality of connection terminals 130a to 130c. In an embodiment, at least one of the guide rail 150 and the bus bar cover 160 can be disposed on the upper portion of the base plate 110.

[0061] The first external terminal 120a and the second external terminal 120b may be disposed on the upper portion of the base plate 110. In an embodiment, the first external terminal 120a and the second external terminal 120b may be spaced apart from each other in a first horizontal direction (e.g., the Y-axis direction). In an embodiment, the first external terminal 120a and the second external terminal 120b may protrude from an end portion of the base plate 110 in a second horizontal direction (e.g., the X-axis direction). Accordingly, each of the first external terminal 120a and the second external terminal 120b may be easily connected to the charge and discharge module. The second horizontal direction (e.g., the X-axis direction) may be a horizontal direction perpendicular to the first horizontal direction (e.g., the Y-axis direction). The horizontal direction may be a direction perpendicular to the height direction (e.g., the Z-axis direction).

[0062] The first connection terminal 130a to the third connection terminal 130c may be disposed on the upper portion of the base plate 110. In an embodiment, the first connection terminal 130a may be disposed on the upper portion of the first external terminal 120a, and the second connection terminal 130b may be disposed on the upper portion of the second external terminal 120b.

[0063] In an embodiment, the third connection terminal 130c may be spaced apart from the first connection terminal 130a in a second horizontal direction (e.g., the X-axis direction). The second horizontal direction (e.g., the X-axis direction) may be a horizontal direction perpendicular to the first horizontal direction (e.g., the Y-axis direction).

[0064] In an embodiment, when the first electrode tab and the second electrode tab of the battery cell protrude in opposite directions, the third connection terminal 130c may be electrically connected to the second electrode tab of the battery cell. Here, the first electrode tab of the battery cell may be electrically connected to the first connection terminal 130a.

[0065] In an embodiment, the third connection terminal 130c may move in a second horizontal direction (e.g., the X-axis direction). That is, the distance between the first connection terminal 130a and the third connection terminal 130c may be adjusted. Accordingly, the charge and discharge device 100 may be compatible with each battery cell having various sizes (or lengths).

[0066] In an embodiment, the second connection terminal 130b may be spaced apart from the first connection terminal 130a in a first horizontal direction (e.g., the Y-axis direction).

[0067] In an embodiment, when the first electrode tab and the second electrode tab of the battery cell protrude in the same direction, the second connection terminal 130b may be electrically connected to the second electrode tab of the battery cell. Here, the first electrode tab of the battery cell may be electrically connected to the first connection terminal 130a.

[0068] In an embodiment, at least a portion of the bus bar 140 may be disposed in the lower part of the base plate 110. Another portion of the bus bar 140 may be disposed in the through hole of the base plate 110 and may be in contact with the second external terminal 120b. The through hole may be formed by penetrating at least a portion of the region of the base plate 110 where the second external terminal 120b is located in the height direction (e.g., the Z-axis direction).

[0069] In an embodiment, the base plate 110 may include an opening 115. The opening 115 may be formed such that at least a portion of the upper part of the bus bar 140 is exposed. In an embodiment, the opening 115 may be located in the region between the third connection terminal 130c and the first connection terminal 130a.

[0070] The guide rail 150 refers to the path along which the third connection terminal 130c moves. The third connection terminal 130c may move along the second horizontal direction (e.g., the X-axis direction) through the guide rail 150. That is, the third connection terminal 130c may move or stop on the guide rail 150. In an embodiment, the guide rail 150 may be provided along the second horizontal direction (e.g., the X-axis direction) from the first connection terminal 130a. In an embodiment, the guide rail 150 may be disposed on the upper part of the base plate 110. In an embodiment, a pair of guide rails 150 spaced apart in the first horizontal direction (e.g., the Y-axis direction) may be disposed on the upper part of the base plate 110. The opening 115 may be located in the region between the pair of guide rails 150.

[0071] In an embodiment, the bus bar cover 160 may be disposed between the first connection terminal 130a and the third connection terminal 130c. The main body of the battery cell may be placed on the bus bar cover 160. In an embodiment, the bus bar cover 160 may be coupled to the side end of the third connection terminal 130c. In an embodiment, the bus bar cover 160 may be disposed on the guide rail 150.

[0072] In an embodiment, the bus bar cover 160 may include a cover member 161 and a receiving portion 163.

[0073] When the third connection terminal 130c moves along the second horizontal direction (e.g., the X-axis direction), the length of the cover member 161 may be adjusted. In an embodiment, the end of the cover member 161 may be coupled to the first connection terminal 130a. The receiving portion 163 may receive at least a portion of the cover member 161.

[0074] In an embodiment, each of the plurality of connection terminals 130a - 130c includes at least one of a base frame 131a - 131c, a pressing portion 132a - 132c, an adjusting portion 133a - 133c, a slot portion 134a - 134c, and a connecting portion 135a - 135c.

[0075] The base frames 131a to 131c can fix the components of the respective connection terminals 130a to 130c.

[0076] The pressing parts 132a to 132c can be provided on the upper part of the electrode tabs of the battery cell. The height of the pressing parts 132a to 132c can be adjusted by the adjusting parts 133a to 133c.

[0077] The connecting parts 135a to 135c can be provided on the lower part of the electrode tabs. The connecting parts 135a to 135c can be electrically connected to the corresponding external terminals among the first external terminal 120a and the second external terminal 120b. Here, the connecting parts 135a to 135c can include a conductive material.

[0078] The adjusting parts 133a to 133c can adjust the height of the pressing parts 132a to 132c. The height can be a position in the height direction (for example, the Z-axis direction).

[0079] The electrode tabs of the battery cell can be inserted into the slot parts 134a to 134c. The slot parts 134a to 134c can refer to the space between the pressing parts 132a to 132c and the connecting parts 135a to 135c.

[0080] Figure 5 FIG. is a view showing a state in which a charge-discharge device according to an embodiment is combined with a first type of battery cell. Figure 5 100-B2 of shows a cross section of B2.

[0081] Refer to Figure 5 , the battery cell 200 can include a main body 210 and electrode tabs 220a, 220b. Here, the type of the battery cell 200 can be the first type. The first type can mean that a pair of electrode tabs 220a, 220b of the battery cell 200 protrude in opposite directions. In an embodiment, the electrode tabs 220a, 220b can include a first electrode tab 220a and a second electrode tab 220b that protrude in opposite directions from the main body 210. The first electrode tab 220a and the second electrode tab 220b can be electrode tabs of different polarities. The main body 210 can include a cathode, an anode, a separator, and a case for accommodating them. In an embodiment, the main body 210 can further include an electrolyte.

[0082] The charge-discharge device 100 can include a plurality of external terminals 120a, 120b, a plurality of connection terminals 130a to 130c, and a bus bar 140. In an embodiment, the charge-discharge device 100 can further include at least one of a base plate 110, a guide rail 150, and a bus bar cover 160.

[0083] In an embodiment, the bus bar cover 160 may be disposed between the first connection terminal 130a and the third connection terminal 130c. The main body 210 of the battery cell 200 may be placed on the bus bar cover 160 of the charge-discharge device 100. The bus bar cover 160 may minimize the upper exposure of the bus bar 140. That is, the bus bar cover 160 may minimize the contact between the battery cell 200 placed on the charge-discharge device 100 and the bus bar 140.

[0084] In an embodiment, the distance d1 between the third connection terminal 130c and the first connection terminal 130a may be greater than the main body length d2 of the battery cell 200. The main body length d2 may represent the length of the main body 210 of the battery cell 200 in the second horizontal direction (e.g., the X-axis direction). When the third connection terminal 130c moves, the distance d1 between the third connection terminal 130c and the first connection terminal 130a may be adjusted. The distance d1 between the third connection terminal 130c and the first connection terminal 130a may be determined according to the main body length d2 and / or the distance between the electrode tabs 220a, 220b of the battery cell 200.

[0085] In an embodiment, the first electrode tab 220a of the battery cell 200 may be electrically connected to the first external terminal 120a through the connection portion 135a of the first connection terminal 130a. The second electrode tab 220b of the battery cell 200 may be electrically connected to the second external terminal 120b through the connection portion 135c of the third connection terminal 130c and the bus bar 140.

[0086] Figure 6 FIG. is a diagram showing a state in which the third connection terminal moves according to an embodiment. Figure 6 100-B3 of shows a cross-section of B3.

[0087] Referring to Figure 5 and Figure 6 , the third connection terminal 130c of the charge-discharge device 100 may move relative to the first connection terminal 130a in the second horizontal direction (e.g., the X-axis direction).

[0088] In an embodiment, the bus bar cover 160 may be disposed between the third connection terminal 130c and the first connection terminal 130a. In an embodiment, the bus bar cover 160 may move together with the third connection terminal 130c. In this case, the length of the bus bar cover 160 may be adjusted. For example, when the degree to which the cover member 161 is received in the receiving portion 163 increases, the length of the bus bar cover 160 may decrease, and when the degree to which the cover member 161 is received in the receiving portion 163 decreases, the length of the bus bar cover 160 may increase.

[0089] In an embodiment, as Figure 6As shown, the third connection terminal 130c can move along the second horizontal direction (e.g., the X-axis direction) to reduce the distance d1 from the first connection terminal 130a. In this case, the length of the bus bar cover 160 can be reduced.

[0090] In an embodiment, different from Figure 6 the third connection terminal 130c can move along the second horizontal direction (e.g., the X-axis direction) to increase the distance d1 from the first connection terminal 130a. In this case, the length of the bus bar cover 160 can be increased.

[0091] Figure 7 FIG. is a diagram showing a state in which a first type of battery cell according to an embodiment is combined with a charge and discharge device. Figure 7 100-B4 in represents the cross-section of B4.

[0092] Referring to Figure 7 , the battery cell 300 can include a main body 310 and electrode tabs 320a, 320b. Here, the type of the battery cell 300 can be the first type.

[0093] In an embodiment, the bus bar cover 160 can be disposed between the first connection terminal 130a and the third connection terminal 130c. The main body 310 of the battery cell 300 can be placed on the bus bar cover 160.

[0094] In an embodiment, the distance between the third connection terminal 130c and the first connection terminal 130a can be greater than the main body length of the battery cell 300. The main body length can represent the length of the main body 310 of the battery cell 300 in the second horizontal direction (e.g., the X-axis direction).

[0095] In an embodiment, the first electrode tab 320a of the battery cell 300 can be electrically connected to the first external terminal 120a through the connection portion of the first connection terminal 130a. The second electrode tab 320b of the battery cell 300 can be electrically connected to the second external terminal 120b through the connection portion of the third connection terminal 130c and the bus bar 140.

[0096] Referring to Figure 5 and Figure 7 , the present disclosure can provide a charge and discharge device 100 that is compatible with each of the battery cells 200, 300 having various lengths.

[0097] Figure 8 FIG. is a diagram showing a state in which a charge and discharge device according to an embodiment is combined with a second type of battery cell.

[0098] Referring to Figure 8, the battery cell 400 may include a main body 410 and electrode tabs 420a and 420b. Here, the type of the battery cell 400 may be a second type. The second type may indicate that a pair of electrode tabs 420a and 420b of the battery cell 400 protrude in the same direction. In an embodiment, the electrode tabs 420a and 420b may include a first electrode tab 420a and a second electrode tab 420b that protrude from the main body 410 in the same direction. The first electrode tab 420a and the second electrode tab 420b may be electrode tabs of different polarities. The main body 410 may include a cathode, an anode, a separator, and a housing that houses them. In an embodiment, the main body 410 may further include an electrolyte.

[0099] In an embodiment, the main body 410 of the battery cell 400 may be disposed on at least a part of the bus bar cover 160 of the charge-discharge device 100.

[0100] In an embodiment, the distance between the third connection terminal 130c and the first connection terminal 130a may be greater than the main body length of the battery cell 400. The main body length may indicate the length of the main body 410 of the battery cell 400 in the second horizontal direction (e.g., the X-axis direction).

[0101] In an embodiment, the first electrode tab 420a of the battery cell 400 may be electrically connected to the first external terminal 120a through the connection portion of the first connection terminal 130a. The second electrode tab 420b of the battery cell 400 may be electrically connected to the second external terminal 120b through the connection portion of the second connection terminal 130b.

[0102] As Figure 7 and Figure 8 shown, the present disclosure may provide a charge-discharge device 100 that is compatible with each of various types of battery cells 300 and 400.

[0103] Figure 9 is a diagram for explaining connection terminals of a charge-discharge device according to an embodiment.

[0104] Referring to Figure 9 , the connection terminal 830 may include a base frame 831, a pressing portion 832, an adjusting portion 833, a slot portion 834, and a connection portion 835. The connection terminal 830 may be one or each of the above-mentioned first connection terminal 130a and second connection terminal 130b.

[0105] The base frame 831 can fixedly connect the components of the terminal 830. In an embodiment, the base frame 831 can include a lower frame, a connecting frame, and an upper frame. In an embodiment, the adjusting portion 833 can be inserted through a through hole in the upper frame. The lower frame can be disposed on the base plate 110. The upper frame can be spaced apart from the base plate 110 in the height direction (e.g., the Z-axis direction). The connecting frame can connect the upper frame and the lower frame.

[0106] The pressing portion 832 can be disposed on the upper portion of the electrode tab of the battery cell. The height of the pressing portion 832 can be adjusted by the adjusting portion 833. In an embodiment, the pressing portion 832 can include a conductive material.

[0107] The electrode tab of the battery cell can be inserted into the slot portion 834. The slot portion 834 can refer to the space between the pressing portion 832 and the connecting portion 835.

[0108] The connecting portion 835 can be electrically connected to the external terminal 120. The connecting portion 835 can include a conductive material. The external terminal 120 can be one or each of the first external terminal 120a and the second external terminal 120b. For example, the lower end of the connecting portion 835 can contact the upper end of the external terminal 120.

[0109] The connecting portion 835 can be disposed on the lower portion of the electrode tab of the battery cell.

[0110] The adjusting portion 833 can adjust the height of the pressing portion 832. The lower end of the adjusting portion 833 can contact the upper end of the pressing portion 832. For example, when the adjusting portion 833 rotates in the clockwise or counterclockwise direction, the height of the pressing portion 832 can increase or decrease.

[0111] In an embodiment, in a state where the electrode tab of the battery cell is inserted into the slot portion 834, the height of the pressing portion 832 can be gradually decreased by the adjusting portion 833. In this case, the pressing portion 832 presses the upper portion of the electrode tab of the battery cell so that the lower end of the electrode tab can contact the upper end of the connecting portion 835. In this case, the electrode tab of the battery cell can be electrically connected to the external terminal 120 through the connecting portion 835.

[0112] Figure 10 It is a diagram for explaining the connection terminal of the charge and discharge device according to an embodiment.

[0113] Refer to Figure 10 , the connection terminal 930 can include a base frame 931, a pressing portion 932, an adjusting portion 933, a slot portion 934, and a connecting portion 935. The connection terminal 930 can be the above-mentioned third connection terminal 130c. In an embodiment, the connection terminal 930 can further include an elastic member 936.

[0114] The base frame 931 can fixedly connect the components of the connection terminal 930. In an embodiment, the base frame 931 can include a lower frame, a connection frame, and an upper frame. In an embodiment, the adjustment portion 933 can be inserted through a through-hole in the upper frame. The lower frame can be disposed on the guide rail 150. The upper frame can be spaced apart from the guide rail 150 or the base plate 110 in the height direction (e.g., the Z-axis direction). The connection frame can connect the upper frame and the lower frame.

[0115] The electrode tab of the battery cell can be inserted into the slot portion 934. The slot portion 934 can refer to the space between the pressing portion 932 and the connection portion 935.

[0116] The pressing portion 932 can be disposed above the electrode tab of the battery cell. The height of the pressing portion 932 can be adjusted by the adjustment portion 933. In an embodiment, the pressing portion 932 can include a conductive material.

[0117] The connection portion 935 can be disposed below the electrode tab of the battery cell. The connection portion 935 can include a conductive material. The height of the connection portion 935 can be adjusted by the adjustment portion 933.

[0118] The elastic member 936 can be connected between the pressing portion 932 and the connection portion 935.

[0119] The adjustment portion 933 can adjust the height of the pressing portion 932. The adjustment portion 933 can adjust the height of the connection portion 935 through the pressing portion 932 and the elastic member 936. The lower end of the adjustment portion 933 can contact the upper end of the pressing portion 932. For example, when the adjustment portion 933 rotates in the clockwise or counterclockwise direction, the height of the pressing portion 932 can increase or decrease.

[0120] In an embodiment, the connection portion 935 can be in a state of being separated from the bus bar 140 or in a state of contacting the bus bar 140 according to the adjustment of the adjustment portion 933.

[0121] In a specific embodiment, when the height of the pressing portion 932 is reduced by the adjustment portion 933, the elastic member 936 can be compressed. The height of the connection portion 935 is reduced by the compressed elastic member 936, and the connection portion 935 can contact the bus bar 140. In this case, the connection portion 935 can be electrically connected to the bus bar 140. For example, when the connection terminal 930 stops, the connection portion 935 can be brought into contact with the bus bar 140 by the adjustment portion 933.

[0122] In a specific embodiment, when the height of the pressing part 932 is increased through the adjusting part 933, the elastic member 936 can be stretched. The height of the connecting part 935 is increased by the restoring force of the stretched elastic member 936, and the connecting part 935 can be separated from the bus bar 140. In this case, the electrical connection between the connecting part 935 and the bus bar 140 can be disconnected. For example, when the connection terminal 930 moves along the guide rail 150, the connecting part 935 can be separated from the bus bar 140 through the adjusting part 933.

[0123] In an embodiment, in a state where the electrode tab of the battery cell is inserted into the slot part 934, the height of the pressing part 932 can be gradually decreased through the adjusting part 933. In this case, the pressing part 932 can press the upper part of the electrode tab of the battery cell so that the lower end of the electrode tab contacts the upper end of the connecting part 935. Also, the lower end of the connecting part 935 can contact the upper end of the bus bar 140. In this case, the electrode tab of the battery cell can be electrically connected to the bus bar 140 through the connecting part 935.

[0124] Figure 11 FIG. is a diagram for explaining a bus bar cover of a charge-discharge device according to an embodiment.

[0125] Referring to Figure 11 , the bus bar cover 160 may include a cover member 161 and a receiving part 163. One end of the bus bar cover 160 may be fixed to the first connection terminal, and the other end of the bus bar cover 160 may be fixed to the third connection terminal. The first connection terminal and the third connection terminal may be separated in the second horizontal direction (e.g., the X-axis direction).

[0126] At least a part of the cover member 161 may be received in the receiving part 163, and the remaining part of the cover member 161 may protrude from the receiving part 163. At least a part of the cover member 161 may protrude in the second horizontal direction (e.g., the X-axis direction). The protruding end of the cover member 161 may be fixed to the first connection terminal.

[0127] The receiving part 163 may include at least one of a rotating shaft 164, a latch 165, a lever 166, a switch 167, and a housing. At least a part of the cover member 161, the rotating shaft 164, at least a part of the latch 165, at least a part of the lever 166, and the switch 167 may be received inside the housing.

[0128] The rotating shaft 164 can wind or unwind the cover member 161. In an embodiment, the rotating shaft 164 can wind or unwind the cover member 161 when rotating in the clockwise or counterclockwise direction. The other end of the cover member 161 can be fixed to the rotating shaft 164. When the rotating shaft 164 winds the cover member 161, the degree to which the cover member 161 is received inside the housing can increase. When the rotating shaft 164 unwinds the cover member 161, the degree to which the cover member 161 is received inside the housing can decrease.

[0129] The latch 165 can be coupled to the rotating shaft 164. The latch 165 can rotate together with the rotating shaft 164. The latch 165 can have a gear shape, but is not limited thereto and can be formed in various shapes.

[0130] The rod 166 can prevent the latch 165 from rotating in the winding direction of the cover member 161 in the clockwise and counterclockwise directions. Due to the interference of the latch 165, the rod 166 can only rotate in one direction.

[0131] The switch 167 can move the rod 166 away from the latch 165. In this case, the interference of the latch 165 is eliminated, so that the cover member 161 can be wound.

[0132] On the other hand, the structure of the above receiving portion 163 is only one embodiment and can be variously modified.

[0133] In an embodiment, the receiving portion can include a spring member, a rod, and a switch.

[0134] The spring member can be coupled to one end of the cover member. For example, one end of the cover member can be a different end from the end fixed to the first connection terminal among the two ends of the cover member. After the cover member is unwound, the spring member can wind the cover member through its restoring force. For example, the spring member can be a material having elasticity and can have a helical shape. When the cover member is unwound, the length of the spring member can be extended, and it can wind the cover member through its restoring force.

[0135] The rod can contact the cover member. The rod can prevent the cover member from winding. For example, the rod can prevent the cover member from winding through the frictional force with the cover member.

[0136] The switch can move the rod away from the cover member to wind the cover member through the spring member.

Claims

1. A charging and discharging device, comprising: A plurality of external terminals, including a first external terminal and a second external terminal for charging or discharging the battery cell; a first connecting terminal electrically connected to the first external terminal; a bus bar electrically connected to the second external terminal; a second connection terminal, spaced apart from the first connection terminal in a first horizontal direction and electrically connected to the second external terminal; as well as The third connection terminal is spaced apart from the first connection terminal in a second horizontal direction perpendicular to the first horizontal direction and is electrically connected to the second external terminal through the bus bar.

2. The charge and discharge device according to claim 1, wherein: The first connecting terminal is electrically connected to the first electrode tab of the battery cell. One of the second connection terminal and the third connection terminal is electrically connected to the second electrode tab of the battery cell.

3. The charge and discharge device according to claim 1 or 2, wherein: When the first electrode tab and the second electrode tab protrude in the same direction, the second connection terminal is electrically connected to the second electrode tab.

4. The charge and discharge device according to claim 1 or 2, wherein: When the first electrode tab and the second electrode tab protrude in opposite directions, the third connection terminal is electrically connected to the second electrode tab.

5. The charging and discharging device according to claim 1, further comprising: A guide rail is arranged at the lower part of the third connecting terminal, The third connecting terminal can be moved along the second horizontal direction by the guide rail.

6. The charge and discharge device according to claim 1 or 5, wherein: The distance between the third connection terminal and the first connection terminal is greater than the main body length of the battery cell.

7. The charge-discharge device according to claim 1, further comprising: a base plate, disposed below the plurality of external terminals, the first connection terminal, the second connection terminal, and the third connection terminal, At least a portion of the bus bar is disposed at a lower portion of the base plate.

8. The charge and discharge device according to claim 7, wherein: The base plate includes an opening portion formed so that at least a portion of an upper portion of the bus bar is exposed, The opening is located in a region between the third connection terminal and the first connection terminal.

9. The charging and discharging device according to claim 8, further comprising: A busbar cover is disposed between the first connection terminal and the third connection terminal, and a main body of the battery cell is placed on the busbar cover.

10. The charge and discharge device according to claim 9, wherein: The bus bar cover comprises: a cover member, wherein a length of the cover member is adjusted when the third connection terminal moves along the second horizontal direction; and The accommodating portion accommodates at least a portion of the cover member.

11. The charge and discharge device according to claim 10, wherein: The receiving portion comprises: a rotating shaft for winding or unwinding the cover member; A lock coupled to the rotating shaft; a rod that prevents the lock catch from rotating in a winding direction of the cover member in a clockwise direction and a counterclockwise direction; and A switch moves the rod away from the latch to wind up the cover member.

12. The charge and discharge device according to claim 10, wherein: The receiving portion comprises: a spring member coupled to one end of the cover member and winding around the cover member by a restoring force after the cover member is unwound; a rod in contact with the cover member to prevent the cover member from winding; and The switch moves the rod away from the cover member to wind up the cover member by the spring member.

13. The charge and discharge device according to claim 1 or 2, wherein: At least one of the first connection terminal and the second connection terminal includes: A pressurizing portion is arranged on an upper portion of a corresponding electrode tab of a first electrode tab and a second electrode tab of the battery cell protruding in the same direction; a connecting portion, disposed at a lower portion of the corresponding electrode tab and electrically connected to a corresponding external terminal of the first external terminal and the second external terminal; and The adjusting part adjusts the height of the pressurizing part so that the pressurizing part presses the upper part of the corresponding electrode tab, thereby electrically connecting the corresponding electrode tab to the connecting part.

14. The charge and discharge device according to claim 1 or 2, wherein: The third connecting terminal comprises: A pressurizing portion, arranged on an upper portion of the second electrode tab of the battery cell, one of the first electrode tab and the second electrode tab protruding in different directions; A connecting portion, disposed at a lower portion of the second electrode tab; and The adjusting part adjusts the height of the pressurizing part so that the pressurizing part presses the upper part of the second electrode tab, thereby making the second electrode tab electrically connected to the bus bar through the connecting part.

15. The charge and discharge device according to claim 14, wherein: The third connection terminal further includes an elastic member connected between the pressurizing portion and the connection portion.

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