Battery charging system and battery charging method

Abstract

The present disclosure relates to a battery charging system and a battery charging method, and the battery charging system is connected to opposite ends of each of a plurality of batteries, and includes: a charger configured to supply power; a bypass device configured to rotate about the central axis and configured to provide a power path connecting at least one of the first battery and the second battery to opposite ends of the charger; and a processor configured to monitor a voltage across opposite ends of each of the first battery and the second battery and control a rotation direction and a rotation angle of the bypass device.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0051447 filed in the Korean Intellectual Property Office on April 19, 2023, the entire contents of which are incorporated herein by reference.

[0003] The present disclosure relates to a battery charging system and a battery charging method. Background Art

[0004] For battery chargers, rated current is an important factor. Therefore, in order to provide high power to charge a battery quickly, it is more effective to increase voltage than to increase current. Therefore, in order to charge multiple batteries, it is more effective to charge multiple batteries in series than to charge multiple batteries in parallel.

[0005] However, during the process of charging a plurality of batteries connected in series, the speed of charging the batteries is different. Therefore, a method is needed to not charge the battery that is fully charged first among the plurality of batteries but to continue charging the remaining batteries. Summary of the invention

[0006] Technical issues

[0007] The present disclosure seeks to provide a battery charging system and a battery charging method capable of charging a plurality of batteries connected in series by electrically disconnecting a battery that is fully charged first from a charger and continuing to charge the remaining batteries.

[0008] Technical Solutions

[0009] An exemplary embodiment of the present disclosure provides a battery charging system connected to opposite ends of each of a plurality of batteries, the battery charging system comprising: a charger configured to supply power; a bypass device configured to rotate about a central axis and configured to provide a power path connecting at least one of a first battery and a second battery to opposite ends of the charger; and a processor configured to monitor voltages at opposite ends of each of the first battery and the second battery and control a rotation direction and a rotation angle of the bypass device.

[0010] The bypass device may include: a first board, the first board including a plurality of bypass nodes, the plurality of bypass nodes being electrically and respectively connected to a positive terminal of a charger, a negative terminal of a charger, a negative terminal of a first battery, and a positive terminal of a second battery; and a second board, the second board including a node connection module, the node connection module being configured to rotate in response to a control signal of a processor and electrically connect two nodes indicated by the control signal among the plurality of bypass nodes.

[0011] A positive terminal of the charger may be connected to the positive terminal of the first battery, and a negative terminal of the charger may be connected to the negative terminal of the second battery.

[0012] When the node connection module is electrically connected to a node connected to a negative terminal of the first battery and a node connected to a positive terminal of the second battery, the charger may supply power to the first battery and the second battery.

[0013] When the node connection module electrically connects a node connected to the negative terminal of the first battery and a node connected to the negative terminal of the charger, the charger may supply power to the first battery.

[0014] When the node connection module electrically connects the node connected to the positive terminal of the second battery and the node connected to the positive terminal of the charger, the charger may supply power to the second battery.

[0015] The processor may compare a voltage across opposite ends of each of the first battery and the second battery with a predetermined reference voltage, and control the bypass device to electrically disconnect a battery between the first and second batteries corresponding to a voltage across opposite ends equal to or higher than the reference voltage from the positive terminal and the negative terminal of the charger.

[0016] Another embodiment of the present disclosure provides a battery charging method, including: receiving a plurality of voltage measurement signals from opposite ends of each of a first battery and a second battery; deriving a voltage at the opposite ends of each of the first battery and the second battery based on the voltage measurement signals; comparing the voltage at the opposite ends of each of the first battery and the second battery with a predetermined reference voltage and generating a control signal; rotating a bypass device receiving the control signal around a central axis and providing a power path connecting at least one of the first battery and the second battery to opposite ends of a charger; and supplying power to at least one battery through the charger.

[0017] The supplying of power may include supplying power to the first battery and the second battery when the bypass device is electrically connected to a node connected to a negative terminal of the first battery and a node connected to a positive terminal of the second battery.

[0018] The supplying of power may include supplying power to the first battery when the bypass device electrically connects a node connected to the negative terminal of the first battery and a node connected to the negative terminal of the charger.

[0019] The supplying of power may include supplying power to the second battery when the bypass device electrically connects a node connected to the positive terminal of the second battery and a node connected to the positive terminal of the charger.

[0020] Effect of the Invention

[0021] According to the present disclosure, in the case where a plurality of batteries are charged in series, a battery that is fully charged first is electrically disconnected from the charger, and the remaining batteries are charged, so that the batteries can be efficiently charged.

[0022] According to the present disclosure, a rotating body structure may be provided instead of a plurality of switch structures to perform a constant operation to electrically disconnect a fully charged battery from a charger and to electrically connect the remaining batteries to the charger.

[0023] According to the present disclosure, unlike a configuration in which a plurality of control signals are required in the case where a plurality of switch structures are provided in two battery packs, the bypass structure can be simply controlled by means of a single control signal according to a single rotating body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a block diagram schematically illustrating a battery charging system according to an embodiment.

[0025] Figure 2 It is a graphic Figure 1 Detailed configuration diagram of the bypass device in the detailed configuration.

[0026] Figure 3 is a circuit diagram illustrating a power path for connecting two batteries in series to a charger according to an embodiment.

[0027] Figure 4 It is a picture Figure 3 1 is a circuit diagram of a power path connecting one of two batteries to a charger according to an embodiment when the bypass device illustrated in FIG. 1 is rotated 90 degrees clockwise.

[0028] Figure 5 It is a picture Figure 3 1 is a circuit diagram of a power path connecting one of two batteries to a charger according to an embodiment when the bypass device illustrated in FIG. 1 is rotated 90 degrees counterclockwise.

[0029] Figure 6 is an illustrative view of a comparison circuit including a plurality of mechanical relays.

[0030] Figure 7 is a circuit diagram illustrating a power path connecting two batteries in series to a charger in a battery charging system in which a plurality of bypass devices are connected according to an embodiment.

[0031] Figure 8 It is a picture Figure 7 1 is a circuit diagram of a power path for connecting three of four batteries to a charger according to an embodiment when one of the two bypass devices illustrated in FIG. 1 is rotated 90 degrees clockwise.

[0032] Fig. 9 It is a picture Figure 8 2 is a circuit diagram of a power path for connecting two of four batteries to a charger according to an embodiment when one of the two bypass devices illustrated in FIG. 1 is rotated 90 degrees counterclockwise.

[0033] Fig.10 It is a picture Fig. 9 1 is a circuit diagram of a power path for connecting one of four batteries to a charger according to an embodiment when one of the two bypass devices illustrated in FIG. 1 is rotated 90 degrees clockwise.

[0034] Fig.11 is a flowchart illustrating a battery charging method according to this embodiment. DETAILED DESCRIPTION

[0035] Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. The same or similar constituent elements are given the same or similar reference numerals, and their repeated description will be omitted. The suffixes "module", "unit", "component" and / or "part" used to describe the constituent elements in the following description are used together or interchangeably to facilitate the description, but the suffixes themselves do not have distinguishable meanings or functions. In addition, in the description of the embodiments disclosed in this specification, when it is determined that the specific description may obscure the subject matter of the embodiments disclosed in this specification, the specific description of the known related art will be omitted. In addition, it should be explained that the drawings are provided only to allow those skilled in the art to easily understand the embodiments disclosed in this specification, and the technical spirit disclosed in this specification is not limited by the drawings, and includes all changes, equivalents and substitutes included in the spirit and technical scope of the present disclosure.

[0036] Terms including ordinal numbers such as "first", "second", etc. may be used to describe various constituent elements, but the constituent elements are not limited by the terms. These terms are only used to distinguish one constituent element from another constituent element.

[0037] In the present application, it should be understood that the terms "including" and "having" are intended to indicate the existence of the characteristics, quantities, steps, operations, constituent elements and components or their combinations described in the specification, and do not exclude the possibility of the prior existence or addition of one or more other characteristics, quantities, steps, operations, constituent elements and components or their combinations.

[0038] Among the components according to the embodiment, a component that controls another component under a specific control condition may be installed with a program implemented as a set of instructions formed by specifying a control algorithm required to control other components. The control component may generate output data by processing input data and stored data depending on the installed program. The control component may include a non-volatile memory configured to store the program, and a memory configured to store data.

[0039] Figure 1 is a block diagram schematically illustrating a battery charging system according to an embodiment.

[0040] refer to Figure 1 The battery charging system 1 may include a processor 100 , a charger 120 , and a bypass device 200 .

[0041] The battery charging system 1 may include a plurality of terminals P1 to P4. The plurality of terminals P1 to P4 may be connected to opposite ends of each of the plurality of batteries 3001 and 3002, respectively. The terminal P1 may be connected to the positive terminal (+) of the battery 3001, the terminal P2 may be connected to the negative terminal (-) of the battery 3001, the terminal P3 may be connected to the positive terminal (+) of the battery 3002, and the terminal P4 may be connected to the negative terminal (-) of the battery 3002.

[0042] The figure illustrates that the number of batteries 3001 and 3002 is two, and the number of terminals P1 to P4 is four. However, this is for convenience of description, and the present disclosure is not limited thereto. The battery charging system 1 may include three or more terminals so as to be connected to opposite ends of each of two or more batteries.

[0043] The charger 120 may be connected to a power source and charge the capacitor 121 with energy by using the power source.

[0044] In a charging cycle for charging the two batteries 3001 and 3002, the bypass device 200 may electrically connect the battery corresponding to the opposite terminal voltage lower than a predetermined reference voltage to the charger 120, and electrically disconnect the battery corresponding to the opposite terminal voltage equal to or higher than the reference voltage from the charger 120.

[0045] The processor 100 may monitor the voltages at opposite ends of each of the two batteries 3001 and 3002 and control the rotation direction and rotation angle of the bypass device 200 so that the two batteries 3001 and 3002 may be electrically connected to the charger 120 or electrically disconnected from the charger 120. For example, depending on whether the voltages of the two batteries 3001 and 3002 are both equal to or higher than a predetermined reference voltage, the processor 100 may determine one of a power path for connecting the two batteries 3001 and 3002 in series, a power path for electrically connecting the negative terminal (-) of the battery 3001 and the negative terminal (-) of the capacitor 121, and a power path for electrically connecting the positive terminal (+) of the battery 3002 and the positive terminal (+) of the capacitor 121. The processor 100 may generate a control signal CS for controlling the rotation direction and rotation angle of the bypass device 200 so that the rotation direction and rotation angle of the bypass device 200 correspond to the determined power path.

[0046] The processor 100 may receive signals VP1, VN1, VP2, and VN2 indicating voltages from opposite ends of each of the two batteries 3001 and 3002. The processor 100 may receive a voltage measurement signal VP1 indicating a positive terminal voltage from a positive terminal (+) of the battery 3001. The processor 100 may receive a voltage measurement signal VN1 indicating a negative terminal voltage from a negative terminal (-) of the battery 3001. The processor 100 may receive a voltage measurement signal VP2 indicating a positive terminal voltage from a positive terminal (+) of the battery 3002. The processor 100 may receive a voltage measurement signal VN2 indicating a negative terminal voltage from a negative terminal (-) of the battery 3002.

[0047] The processor 100 may derive the voltage across each of the two batteries 3001 and 3002 based on the plurality of voltage measurement signals VP1, VN1, VP2, and VN2. For example, the processor 100 may derive the voltage across the battery 3001 based on the two voltage measurement signals VP1 and VN1.

[0048] The processor 100 may generate the control signal CS based on the voltage across opposite ends of each of the two batteries 3001 and 3002. The processor 100 may identify the charging state by monitoring the voltage across opposite ends of each of the two batteries 3001 and 3002. When the result of comparing the voltage across opposite ends of each of the two batteries 3001 and 3002 with a predetermined reference voltage indicates that the voltage across opposite ends of each of the two batteries 3001 and 3002 is equal to or higher than the predetermined reference voltage, the processor 100 may determine that the battery corresponding to the exceeded voltage across opposite ends is fully charged.

[0049] In the case where the two batteries 3001 and 3002 are charged in series, the speeds at which the two batteries 3001 and 3002 are charged may be different from each other. The processor 100 may generate a control signal CS that instructs the bypass device 200 to rotate so that the battery (e.g., 3001) that is first determined to be fully charged between the two batteries 3001 and 3002 does not receive power from the charger 120, and the processor 100 may transmit the control signal CS to the bypass device 200. The processor 100 may control the bypass device 200 based on the control signal CS to electrically disconnect the battery corresponding to the opposite terminal voltage equal to or higher than the reference voltage among the opposite terminal voltages of the two batteries 3001 and 3002 from the positive terminal (+) and the negative terminal (-) of the charger 120. The control signal CS may include a signal indicating a direction and a rotation angle in which the bypass device 200 is to be rotated, so as to form one of a power path for connecting the two batteries 3001 and 3002 in series, a power path for connecting the negative terminal (-) of the battery 3001 and the negative terminal (-) of the capacitor 121, and a power path for connecting the positive terminal (+) of the battery 3002 and the positive terminal (+) of the capacitor 121.

[0050] The charger 120 may supply power to at least one of the two batteries 3001 and 3002. A positive terminal (+) and a negative terminal (-) of the capacitor 121 may be connected to corresponding terminals (eg, P1 and P4) among a plurality of terminals P1 to P4.

[0051] The bypass device 200 can rotate around the central axis 210 by an angle indicated by the control signal CS, and provide a power path that will be determined by the processor 100 so that at least one battery charged by the charger 102 is connected to the charger 120. The bypass device 200 can connect the positive terminal (+) and / or the negative terminal (-) of the capacitor 121 to the corresponding terminal among the plurality of terminals P1 to P4. In addition, in the case where the processor 100 determines that the number of batteries to be charged is two or more, the bypass device 200 can connect two or more batteries in series.

[0052] The battery charging system 1 may include a plurality of lines LN1 to LN4 indicating a plurality of power paths. The bypass device 200 may include a plurality of terminals P200_1 to P200_4 connected to the plurality of lines LN1 to LN4. The line LN1 may be arranged along a power path between the positive terminal (+) of the capacitor 121 and the terminal P200_4. The line LN2 may be arranged along a power path between the negative terminal (-) of the capacitor 121 and the terminal P200_1. The line LN3 may be arranged along a power path between the terminal P2 and the terminal P200_2. The line LN4 may be arranged along a power path between the terminal P3 and the terminal P200_3.

[0053] Figure 1 The number of lines LN1 to LN4 shown in the figure is four, and the number of terminals P200_1 to P200_4 is four. However, this is for convenience of description, and the present disclosure is not limited thereto. The battery charging system 1 may include four or more terminals, and the bypass device 200 may be connected to four or more lines.

[0054] The bypass device 200 may rotate and provide a power path connecting two adjacent terminals (eg, P200_2 and P200_3 ) among the plurality of terminals P200_1 to P200_4 .

[0055] In the first embodiment, the bypass device 200 can provide a power path connecting two adjacent terminals P200_2 and P200_3. In the second embodiment, the bypass device 200 can be rotated 90 degrees clockwise based on the first embodiment, and provide a power path connecting two adjacent terminals P200_3 and P200_4. In the third embodiment, the bypass device 200 can be rotated 90 degrees counterclockwise based on the first embodiment, and provide a power path connecting two adjacent terminals P200_1 and P200_2. In the fourth embodiment, the bypass device 200 can be rotated 90 degrees clockwise based on the second embodiment, and provide a power path connecting two adjacent terminals P200_4 and P200_1.

[0056] In the first embodiment, the bypass device 200 may connect the two batteries 3001 and 3002 in series to the charger 120. In this case, the charger 120 may supply power to the two batteries 3001 and 3002. In the second embodiment, the bypass device 200 may connect the positive terminal (+) of the capacitor 121 and the positive terminal of the battery 3002. In this case, the charger 120 may supply power to the battery 3002. In the third embodiment, the bypass device 200 may connect the negative terminal (-) of the capacitor 121 and the negative terminal of the battery 3001. In this case, the charger 120 may supply power to the battery 3001. In the fourth embodiment, the bypass device 200 may connect the positive terminal (+) of the capacitor 121 and the negative terminal (-) of the capacitor 121. In this case, the charger 120 does not supply power to the two batteries 3001 and 3002.

[0057] Figure 2 It is a graphic Figure 1 Detailed configuration view of the bypass device in the detailed configuration.

[0058] refer to Figure 2, the bypass device 200 may include a central shaft 210, an upper plate 220 and a lower plate 230. In the specification, for the convenience of description, terms such as the upper plate 220 and the lower plate 230 are used. However, this is for the convenience of description, and the present disclosure is not limited thereto. In the bypass device 200, the upper plate 220 may be positioned below the lower plate 230.

[0059] The upper plate 220 may include a central portion 221 and a node connection module 223. The node connection module 223 may include a connection portion 2231, a first contact portion 2232a, and a second contact portion 2232b. The first contact portion 2232a and the second contact portion 2232b may be connected to each other through the connection portion 2231. The connection portion 2231 may be implemented by a bus bar, etc. The spacing distance between the first contact portion 2232a and the second contact portion 2232b may be a predetermined distance d1.

[0060] The lower plate 230 may include a central portion 231 and a plurality of bypass nodes 2321 to 2324 .

[0061] The lower plate 230 may include a plurality of bypass nodes 2321 to 2324 respectively and electrically connected to the positive terminal (+) and the negative terminal (-) of the charger 120, the negative terminal of the battery 3001, and the positive terminal of the battery 3002. The upper plate 220 may rotate in response to the control signal CS and electrically connect or disconnect two adjacent nodes among the plurality of bypass nodes 2321 to 2324 by means of the node connection module 223.

[0062] Among the plurality of bypass nodes 2321 to 2324, two adjacent nodes may be placed to be spaced apart from each other by a predetermined distance d2 based on the central portion 231. The spacing distance between the bypass node 2321 and the bypass node 2322, the spacing distance between the bypass node 2322 and the bypass node 2323, the spacing distance between the bypass node 2323 and the bypass node 2324, and the spacing distance between the bypass node 2324 and the bypass node 2321 may all be the predetermined distance d2.

[0063] Bypass node 2322 may be formed at a position rotated 90 degrees clockwise from bypass node 2321 based on center portion 231. Bypass node 2323 may be formed at a position rotated 90 degrees clockwise from bypass node 2322 based on center portion 231. Bypass node 2324 may be formed at a position rotated 90 degrees clockwise from bypass node 2323 based on center portion 231.

[0064] The predetermined distance d2 may be a distance falling within a predetermined range based on the predetermined distance d1.

[0065] The spacing distance between the center portion 221 and the first contact portion 2232a, the spacing distance between the center portion 221 and the second contact portion 2232b, the spacing distance between the center portion 231 and the bypass node 2321, the spacing distance between the center portion 231 and the bypass node 2322, the spacing distance between the center portion 231 and the bypass node 2323, and the spacing distance between the center portion 231 and the bypass node 2324 can fall within a predetermined range based on a predetermined length.

[0066] Figure 2 The multiple bypass nodes 2321 to 2324 shown in FIG. 2 may be Figure 1 The bypass node 2321 may be an example of the terminal P200_1, the bypass node 2322 may be an example of the terminal P200_2, the bypass node 2323 may be an example of the terminal P200_3, and the bypass node 2324 may be an example of the terminal P200_4.

[0067] Bypass node 2321 can be connected to a Figure 1 The bypass node 2322 may be connected to a line LN2 having a negative terminal (-) connected to the capacitor 121 shown in FIG. Figure 1 The bypass node 2322 may be connected to a line LN3 having a terminal P2 connected to the circuit. Figure 1 The bypass node 2324 may be connected to a line LN4 having a terminal P3 connected to one end of the line LN4. Figure 1 The line LN1 is one end of the positive terminal (+) of the capacitor 121 shown in the figure.

[0068] The node connection module 223 and the plurality of bypass nodes 2321 to 2324 may each electrically connect the connected power lines.

[0069] The central portion 231 may be an area corresponding to the central portion 221. The lower plate 230 may be connected to the plurality of lines LN1 to LN4 without rotating, and the upper plate 220 may rotate around the central axis 210. When the upper plate 220 rotates around the central axis 210, the node connection module 223 may electrically connect two adjacent bypass nodes (e.g., 2322 and 2323) among the plurality of bypass nodes 2321 to 2324 through a bus bar or the like.

[0070] The bypass device 200 may include a rotation driving part 211 configured to rotate the upper plate 220 around the central axis 210 in response to the control signal CS.

[0071] For example, when the upper plate 220 is rotated and stopped at an angle at which the lower portion of the first contact portion 2232a can contact the upper portion of the bypass node 2322 and the lower portion of the second contact portion 2232b can contact the upper portion of the bypass node 2323, the bypass device 200 can provide a bypass power path from the line LN3 through the bypass node 2322, the first contact portion 2232a, the connecting portion 2231, the second contact portion 2232b and the bypass node 2323 to reach the line LN4.

[0072] When the upper plate 220 is rotated and stopped at an angle at which the lower portion of the first contact portion 2232a can contact the upper portion of the bypass node 2323 and the lower portion of the second contact portion 2232b can contact the upper portion of the bypass node 2324, the bypass device 200 can provide a bypass power path from the line LN1 through the bypass node 2324, the second contact portion 2232b, the connecting portion 2231, the first contact portion 2231, the first contact portion 2232a and the bypass node 2323 to reach the line LN4.

[0073] When the upper plate 220 is rotated and stopped at an angle at which the lower portion of the first contact portion 2232a can contact the upper portion of the bypass node 2321 and the lower portion of the second contact portion 2232b can contact the upper portion of the bypass node 2322, the bypass device 200 can provide a bypass power path from the line LN2 through the bypass node 2321, the first contact portion 2232a, the connecting portion 2231, the second contact portion 2232b and the bypass node 2322 to reach the line LN3.

[0074] In this specification, for convenience of description, the rotation of the upper plate 220 in response to the control signal CS will be described as the rotation of the bypass device 200 .

[0075] In the following, reference will be made to Figures 3 to 5 To describe through Figure 1 The power path achieved by the rotation of the bypass device 200 shown in FIG.

[0076] Figure 3 is a circuit diagram illustrating a power path for connecting two batteries in series to a charger according to an embodiment.

[0077] Figure 3 The battery charging system 1_1 shown in the figure can be Figure 1 An example of a battery charging system 1 is shown in FIG. Figure 3 , the battery charging system 1_1 may include a processor 100, a charger 120, and a bypass device 200_1. Hereinafter, descriptions of the processor 100, the charger 120, the bypass device 200_1, and the two batteries 3001 and 3002 which are the same as the above-mentioned components may be omitted.

[0078] The bypass device 200_1 may include a node connection module 223, and the node connection module 223 may include a first contact portion 2232a, a connection portion 2231, and a second contact portion 2232b.

[0079] The bypass device 200_1 may be rotated at an angle at which the first contact portion 2232a may contact the terminal P200_2 and the second contact portion 2232b may contact the terminal P200_3.

[0080] In the battery charging system 1_1, the positive terminal (+) of the capacitor 121 can be connected to the positive terminal (+) of the battery 3001 through an electric power path passing through the terminal P1. The negative terminal (-) of the battery 3001 can be connected to the positive terminal (+) of the battery 3002 through an electric power path passing through the terminal P2, the line LN3, the node connection module 223, the line LN4, and the terminal P3. The negative terminal (-) of the battery 3002 can be connected to the negative terminal (-) of the capacitor 121 through an electric power path passing through the terminal P4.

[0081] In the battery charging system 1_1 , the charger 120 can supply power to two batteries 3001 and 3002 through the bypass device 200_1 .

[0082] Figure 4 It is a picture Figure 3 1 is a circuit diagram of a power path connecting one of two batteries to a charger according to an embodiment when the bypass device illustrated in FIG. 1 is rotated 90 degrees clockwise.

[0083] Figure 4 The battery charging system 1_2 shown in the figure can be Figure 1 An example of a battery charging system 1 is illustrated in FIG. Figure 4 The battery charging system 1_2 shown in the figure can be in Figure 1 The bypass device 200 of the battery charging system 1 shown in the figure is in a state where it is rotated 90 degrees clockwise or 270 degrees counterclockwise.

[0084] refer to Figure 4 , the battery charging system 1_2 may include a processor 100, a charger 120, and a bypass device 200_2. Hereinafter, descriptions of the processor 100, the charger 120, the bypass device 200_2, and the two batteries 3001 and 3002, which are the same as the above-mentioned components, may be omitted.

[0085] The bypass device 200_2 may include a node connection module 223, and the node connection module 223 may include a first contact portion 2232a, a connection portion 2231, and a second contact portion 2232b.

[0086] The bypass device 200_2 may rotate at an angle at which the first contact portion 2232a may contact the terminal P200_3 and the second contact portion 2232b may contact the terminal P200_4. The processor 100 may control the bypass device 200_2 by responding to the control signal CS. Figure 3 The bypass device 20_1 shown in the figure is rotated 90 degrees clockwise to achieve Figure 4 The bypass device 200_2 is shown in FIG.

[0087] In the battery charging system 1_2, the positive terminal (+) of the capacitor 121 can be connected to the positive terminal (+) of the battery 3002 through an electric power path passing through the line LN1, the node connection module 223, the line LN4, and the terminal P3. The negative terminal (-) of the battery 3002 can be connected to the negative terminal (-) of the capacitor 121 through an electric power path passing through the terminal P4.

[0088] In the battery charging system 1_2, the charger 120 may supply power to the battery 3002 through the bypass device 200_2.

[0089] Figure 5 It is a picture Figure 3 1 is a circuit diagram of a power path connecting one of two batteries to a charger according to an embodiment when the bypass device illustrated in FIG. 1 is rotated 90 degrees counterclockwise.

[0090] Figure 5 The battery charging system 1_3 shown in the figure can be Figure 1 An example of a battery charging system 1 is illustrated in FIG. Figure 5 The battery charging system 1_3 shown in the figure can be in Figure 1 The bypass device 200 of the battery charging system 1 shown in the figure is in a state where it is rotated 270 degrees clockwise or 90 degrees counterclockwise.

[0091] refer to Figure 5 , the battery charging system 1_3 may include a processor 100, a charger 120, and a bypass device 200_3. Hereinafter, descriptions of the processor 100, the charger 120, the bypass device 200_3, and the two batteries 3001 and 3002, which are the same as the above-mentioned components, may be omitted.

[0092] The bypass device 200_3 may include a node connection module 223, and the node connection module 223 may include a first contact portion 2232a, a connection portion 2231, and a second contact portion 2232b.

[0093] The bypass device 200_3 may be rotated at an angle at which the first contact portion 2232a may contact the terminal P200_3 and the second contact portion 2232b may contact the terminal P200_4. The processor 100 may be configured to respond to the control signal CS by Figure 3 The bypass device 20_1 shown in the figure is rotated 90 degrees counterclockwise to achieve Figure 5 Alternatively, the processor 100 may respond to the control signal CS by switching the bypass device 200_3. Figure 4 The bypass device 200_2 shown in the figure is rotated 180 degrees clockwise or counterclockwise to achieve Figure 5 The bypass device 200_3 shown in FIG.

[0094] In the battery charging system 1_3, the positive terminal (+) of the capacitor 121 can be connected to the positive terminal (+) of the battery 3001 through an electric power path passing through the terminal P1. The negative terminal (-) of the battery 3001 can be connected to the negative terminal (-) of the capacitor 121 through an electric power path passing through the terminal P2, the line LN3, the node connection module 223, and the line LN2.

[0095] In the battery charging system 1_3 , the charger 120 may supply power to the battery 3001 through the bypass device 200_3 .

[0096] Figure 6 is an illustrative view of a comparison circuit including a plurality of mechanical relays.

[0097] For example, Figure 6 The comparison circuit 4 illustrated in FIG. 4 does not include a bypass device of the battery charging system. The comparison circuit 4 may include a processor 400 , a charger 420 , and three mechanical relays 441 to 443 .

[0098] The comparison circuit 4 may include a plurality of terminals C_P1 to C_P4. The plurality of terminals C_P1 to C_P4 may be connected to opposite ends of each of the two batteries 5001 and 5002. The terminal C_P1 may be connected to the positive terminal (+) of the battery 5001, the terminal C_P2 may be connected to the negative terminal (-) of the battery 5001, the terminal C_P3 may be connected to the positive terminal (+) of the battery 5002, and the terminal C_P4 may be connected to the negative terminal (-) of the battery 5002.

[0099] The charger 420 may be connected to a power source and charges the capacitor 421 with energy by using the power source. One end of the relay 441 is connected to the positive terminal (+) of the capacitor C0, and the other end of the relay 441 is connected to the terminal C_P3. One end of the relay 442 is connected to the negative terminal (-) of the capacitor C0, and the other end of the relay 442 is connected to the terminal C_P2. One end of the relay 443 is connected to the terminal C_P2, and the other end of the relay 443 is connected to the terminal C_P3.

[0100] The processor 400 may monitor the voltage across opposite ends of each of the two batteries 5001 and 5002 and determine at least one of the two batteries 5001 and 5002 to be charged by receiving power from the charger 420 .

[0101] The processor 400 may receive signals C_VP1, C_VN1, C_VP2, and C_VN2 indicating voltages from opposite ends of each of the two batteries 3001 and 3002. The processor 400 may receive a voltage measurement signal C_VP1 indicating a positive terminal voltage from a positive terminal (+) of the battery 5001. The processor 400 may receive a voltage measurement signal C_VN1 indicating a negative terminal voltage from a negative terminal (-) of the battery 5001. The processor 400 may receive a voltage measurement signal C_VP2 indicating a positive terminal voltage from a positive terminal (+) of the battery 5002. The processor 400 may receive a voltage measurement signal C_VN2 indicating a negative terminal voltage from a negative terminal (-) of the battery 5002.

[0102] The processor 400 may derive the voltage across each of the two batteries 5001 and 5002 based on the plurality of voltage measurement signals C_VP1, C_VN1, C_VP2, and C_VN2. For example, the processor 400 may derive the voltage across the battery 5001 based on the two voltage measurement signals C_VP1 and C_VN1.

[0103] The processor 400 may connect the two batteries 5001 and 5002 in series to opposite ends of the charger 420 by closing the two relays 441 and 442 and opening the relay 443 in response to the two relay control signals RCS1 and RCS2 at the OFF level and the relay control signal RCS3 at the ON level.

[0104] Alternatively, the processor 400 may connect the battery 5001 to opposite ends of the charger 420 by closing the two relays 441 and 443 and opening the relay 442 in response to the two relay control signals RCS1 and RCS3 at the OFF level and the relay control signal RCS2 at the ON level.

[0105] Alternatively, the processor 400 may connect the battery 5002 to opposite ends of the charger 420 by closing the two relays 442 and 443 and opening the relay 441 in response to the two relay control signals RCS2 and RCS3 at the OFF level and the relay control signal RCS1 at the ON level.

[0106] In this embodiment, the battery charging system 1 can simply implement the bypass connection by means of a single bypass device 200 , unlike the comparison circuit 4 which implements the bypass function by means of a plurality of mechanical relays 441 to 443 .

[0107] In the following, reference will be made to Figures 7 to 10 To describe it Figure 1 A circuit according to an embodiment is illustrated in which a plurality of bypass devices 200 are connected.

[0108] Figure 7 is a circuit diagram illustrating a power path connecting two batteries in series to a charger in a battery charging system in which a plurality of bypass devices are connected according to an embodiment.

[0109] refer to Figure 7 , the battery charging system 1_4 may include a processor 101, a charger 620, and a plurality of bypass devices 2001_1 and 2001_2.

[0110] Figure 7 The bypass devices 2001_1 and 2001_2 shown in the figure can be implemented as having Figure 1 The bypass device 200 shown in FIG.

[0111] The battery charging system 1_4 may include a plurality of terminals P1 to P8. The plurality of terminals P1 to P8 may be connected to opposite ends of each of the plurality of batteries 3001 to 3004, respectively. Terminal P1 may be connected to the positive terminal (+) of the battery 3001, and terminal P2 may be connected to the negative terminal (-) of the battery 3001. Terminal P3 may be connected to the positive terminal (+) of the battery 3002, and terminal P4 may be connected to the negative terminal (-) of the battery 3002. Terminal P5 may be connected to the positive terminal (+) of the battery 3003, and terminal P6 may be connected to the negative terminal (-) of the battery 3003. Terminal P7 may be connected to the positive terminal (+) of the battery 3004, and terminal P8 may be connected to the negative terminal (-) of the battery 3004.

[0112] The charger 620 may be connected to a power source and charge the capacitor 621 using energy from the power source.

[0113] Hereinafter, descriptions of the processor 101 , the charger 620 , the plurality of bypass devices 2001_1 and 2002_1 , and the plurality of batteries 3001 to 3004 , which are the same components as those mentioned above, may be omitted.

[0114] The processor 101 may monitor opposite terminal voltages of each of the plurality of batteries 3001 to 3004 and determine at least one of the plurality of batteries 3001 to 3004 to be charged by receiving power from the charger 620 .

[0115] The processor 101 may receive signals VP1 to VP4 and VN1 to VN4 indicating voltages from opposite ends of each of the plurality of batteries 3001 to 3004 .

[0116] The processor 101 may receive a voltage measurement signal VP1 indicating a positive terminal voltage from a positive terminal (+) of the battery 3001. The processor 101 may receive a voltage measurement signal VN1 indicating a negative terminal voltage from a negative terminal (-) of the battery 3001. The processor 101 may receive a voltage measurement signal VP2 indicating a positive terminal voltage from a positive terminal (+) of the battery 3002. The processor 101 may receive a voltage measurement signal VN2 indicating a negative terminal voltage from a negative terminal (-) of the battery 3002.

[0117] The processor 101 may receive a voltage measurement signal VP3 indicating a positive terminal voltage from a positive terminal (+) of the battery 3003. The processor 101 may receive a voltage measurement signal VN3 indicating a negative terminal voltage from a negative terminal (-) of the battery 3003. The processor 101 may receive a voltage measurement signal VP4 indicating a positive terminal voltage from a positive terminal (+) of the battery 3004. The processor 101 may receive a voltage measurement signal VN4 indicating a negative terminal voltage from a negative terminal (-) of the battery 3004.

[0118] The processor 101 may derive the voltage across each of the plurality of batteries 3001 to 3004 based on the plurality of voltage measurement signals VP1 to VP4 and VN1 to VN4. For example, the processor 101 may derive the voltage across the battery 3001 based on the two voltage measurement signals VP1 and VN1.

[0119] The processor 101 may generate two control signals CS1 and CS2 based on the voltage across opposite ends of each of the plurality of batteries 3001 to 3004. The processor 101 may identify the charging state by monitoring the voltage across opposite ends of each of the plurality of batteries 3001 to 3004. When the result of comparing the voltage across opposite ends of each of the plurality of batteries 3001 to 3004 with a predetermined reference voltage indicates that the voltage across opposite ends of each of the plurality of batteries 3001 to 3004 is equal to or higher than the predetermined reference voltage, the processor 101 may determine that the battery corresponding to the voltage across opposite ends exceeding the voltage is fully charged.

[0120] In the case where the plurality of batteries 3001 to 3004 are charged in series, the speeds of charging the plurality of batteries 3001 to 3004 may be different from each other. The processor 101 may generate a control signal CS1 instructing the bypass device 2001_1 to rotate so that the battery (e.g., 3001) determined to be fully charged first among the plurality of batteries 3001 to 3004 does not receive power from the charger 620.

[0121] The charger 620 may supply power to at least one of the plurality of batteries 3001 to 3004 .

[0122] The bypass device 2001_1 may include a node connection module 2230_1, and the node connection module 2230_1 may include a first contact portion 2232a_1, a connection portion 2231_1, and a second contact portion 2232b_1.

[0123] The bypass device 2001_2 may include a node connection module 2230_2, and the node connection module 2230_2 may include a first contact portion 2232a_2, a connection portion 2231_2, and a second contact portion 2232b_2.

[0124] The battery charging system 1_4 may include a plurality of lines LN1 to LN8 illustrating a plurality of power paths. The bypass device 2001_1 may include a plurality of terminals P201_1 to P201_4, and the bypass device 2002_1 may include a plurality of terminals P202_1 and P202_4.

[0125] Line LN1 may be arranged along a power path between a positive terminal (+) of capacitor 621 and terminal P201_4. Line LN2 may be arranged along a power path between terminal P201_1 and first node N1. First node N1 may be a node connected to terminal P4 and terminal P5. Line LN3 may be arranged along a power path between terminal P2 and terminal P201_2. Line LN4 may be arranged along a power path between terminal P3 and terminal P201_3.

[0126] Line LN5 may be arranged along a power path between the first node N1 and the terminal P202_4. Line LN6 may be arranged along a power path between the terminal P202_1 and the negative terminal (-) of the capacitor 621. Line LN7 may be arranged along a power path between the terminal P6 and the terminal P202_2. Line LN8 may be arranged along a power path between the terminal P7 and the terminal P202_3.

[0127] Figure 7 The number of bypass devices 2001_1 and 2002_1 is shown as two. However, this is for convenience of description, and the present disclosure is not limited thereto. While corresponding to four or more batteries constituting the battery charging system 1, two or more bypass devices may be included.

[0128] The bypass device 2001_1 may rotate at an angle at which the first contact portion 2232a_1 may contact the terminal P201_2 and the second contact portion 2232b_1 may contact the terminal P201_3. The processor 101 may implement the control signal CS1 in response to the control signal CS2. Figure 7 Bypass device 2001_1 shown in the figure.

[0129] The bypass device 2001_2 may rotate at an angle at which the first contact portion 2232a_2 may contact the terminal P202_2 and the second contact portion 2232b_2 may contact the terminal P202_3. The processor 101 may implement the control signal CS2 in response to the control signal CS2. Figure 7 Bypass device 2001_2 shown in the figure.

[0130] In the battery charging system 1_4, the positive terminal (+) of the capacitor 621 may be connected to the positive terminal (+) of the battery 3001 through an electric power path passing through the terminal P1. The negative terminal (-) of the battery 3001 may be connected to the positive terminal (+) of the battery 3002 through an electric power path passing through the terminal P2, the line LN3, the bypass device 2001_1, the line LN4, and the terminal P3. The negative terminal (-) of the battery 3002 may be connected to the positive terminal (+) of the battery 3003 through an electric power path passing through the terminal P4, the first node N1, and the terminal P5. The negative terminal (-) of the battery 3003 may be connected to the positive terminal (+) of the battery 3004 through an electric power path passing through the terminal P6, the line LN7, the bypass device 2001_2, the line LN8, and the terminal P7. The negative terminal (-) of the battery 3004 may be connected to the negative terminal (-) of the capacitor 621 through an electric power path passing through the terminal P8.

[0131] In the battery charging system 1_4, the charger 620 can supply power to the four batteries 3001 to 3004 through the two bypass devices 2001_1 and 2001_2.

[0132] In a case where the processor 101 determines that the battery 3003 among the plurality of batteries 3001 to 3004 is fully charged first, the processor 101 may rotate the bypass device 2001_2 in response to the control signal CS2.

[0133] Figure 8 It is a picture Figure 7 1 is a circuit diagram of a power path for connecting three of four batteries to a charger according to an embodiment when one of the two bypass devices illustrated in FIG. 1 is rotated 90 degrees clockwise.

[0134] refer to Figure 8 The battery charging system 1_5 may include a processor 101, a charger 620, and a plurality of bypass devices 2001_1 and 2001_3. Figure 7 The bypass device 2001_2 shown in the figure is rotated 90 degrees clockwise to realize the bypass device 2001_3.

[0135] Figure 8 The bypass devices 2001_1 and 2001_3 shown in FIG. 2 can each be implemented as a bypass device having the same Figure 1 The bypass device 200 shown in FIG.

[0136] Figure 8 The battery charging system 1_5 shown in the figure can be located in Figure 7 In the state where the bypass device 2001_2 among the plurality of bypass devices 2001_1 and 2001_2 of the battery charging system 1_4 shown in the figure is rotated 90 degrees clockwise or 270 degrees counterclockwise.

[0137] Hereinafter, descriptions of the processor 101 , the charger 620 , the plurality of bypass devices 2001_1 and 2001_3 , and the plurality of batteries 3001 to 3004 , which are the same components as those mentioned above, may be omitted.

[0138] The bypass device 2001_3 may include a node connection module 2230_2, and the node connection module 2230_2 may include a first contact portion 2232a_2, a connection portion 2231_2, and a second contact portion 2232b_2.

[0139] The bypass device 2001_1 may rotate at an angle at which the first contact portion 2232a_1 may contact the terminal P201_2 and the second contact portion 2232b_1 may contact the terminal P201_3. The processor 101 may implement the control signal CS1 in response to the control signal CS2. Figure 8Bypass device 2001_1 shown in the figure. Figure 8 The rotation angle of the bypass device 2001_1 shown in the figure can be equal to Figure 7 The rotation angle of the bypass device 2001_1 shown in the figure.

[0140] The bypass device 2001_3 may be rotated at an angle at which the first contact portion 2232a_2 may contact the terminal P202_3 and the second contact portion 2232b_2 may contact the terminal P202_4. The processor 101 may respond to the control signal CS2 by Figure 7 The bypass device 2001_2 shown in the figure is rotated 90 degrees clockwise to achieve Figure 8 Bypass device 2001_3 shown in the figure.

[0141] In the battery charging system 1_5, the positive terminal (+) of the capacitor 621 may be connected to the positive terminal (+) of the battery 3001 through an electric power path passing through the terminal P1. The negative terminal (-) of the battery 3001 may be connected to the positive terminal (+) of the battery 3002 through an electric power path passing through the terminal P2, the line LN3, the bypass device 2001_1, the line LN4, and the terminal P3. The negative terminal (-) of the battery 3002 may be connected to the positive terminal (+) of the battery 3004 through an electric power path passing through the terminal P4, the first node N1, the line LN5, the bypass device 2001_3, the line LN8, and the terminal P7. The negative terminal (-) of the battery 3004 may be connected to the negative terminal (-) of the capacitor 621 through an electric power path passing through the terminal P8.

[0142] In the battery charging system 1_5, the charger 620 can supply power to the three batteries 3001, 3002 and 3004 through the two bypass devices 2001_1 and 2001_3.

[0143] In the case where the processor 101 determines that the battery 3002 among the three batteries 3001 , 3002 , and 3004 is fully charged first, the processor 101 may rotate the bypass device 2001_1 in response to the control signal CS1 .

[0144] Fig. 9 It is a picture Figure 8 2 is a circuit diagram of a power path for connecting two of four batteries to a charger according to an embodiment when one of the two bypass devices illustrated in FIG. 1 is rotated 90 degrees counterclockwise.

[0145] refer to Fig. 9 The battery charging system 1_6 may include a processor 101, a charger 620, and a plurality of bypass devices 2001_3 and 2001_4. Figure 8The bypass device 2001_1 shown in the figure is rotated 90 degrees counterclockwise to realize the bypass device 2001_4.

[0146] Fig. 9 The bypass devices 2001_3 and 2001_4 shown in the figure can be implemented as having Figure 1 The bypass device 200 shown in FIG.

[0147] Fig. 9 The battery charging system 1_6 shown in the figure can be in Figure 8 In the state where the bypass device 2001_1 among the plurality of bypass devices 2001_1 and 2001_3 of the battery charging system 1_5 shown in the figure is rotated 270 degrees clockwise or 90 degrees counterclockwise.

[0148] Hereinafter, descriptions of the processor 101, the charger 620, the plurality of bypass devices 2001_3 and 2001_4, and the plurality of batteries 3001 to 3004, which are the same components as those mentioned above, may be omitted.

[0149] The bypass device 2001_4 may include a node connection module 2230_1, and the node connection module 2230_1 may include a first contact portion 2232a_1, a connection portion 2231_1, and a second contact portion 2232b_1.

[0150] The bypass device 2001_4 may be rotated at an angle at which the first contact portion 2232a_1 may contact the terminal P201_1 and the second contact portion 2232b_1 may contact the terminal P201_2. Figure 8 The bypass device 2001_1 shown in the figure is rotated 90 degrees counterclockwise to achieve Fig. 9 Bypass device 2001_4 shown in the figure.

[0151] The bypass device 2001_3 may rotate at an angle at which the first contact portion 2232a_2 may contact the terminal P202_3 and the second contact portion 2232b_2 may contact the terminal P202_4. The processor 101 may implement the control signal CS2 in response to the control signal CS2. Fig. 9 Bypass device 2001_3 shown in the figure. Fig. 9 The rotation angle of the bypass device 2001_3 shown in the figure can be equal to Figure 8 The rotation angle of the bypass device 2001_3 shown in the figure.

[0152] In the battery charging system 1_6, the positive terminal (+) of the capacitor 621 may be connected to the positive terminal (+) of the battery 3001 through an electric power path passing through the terminal P1. The negative terminal (-) of the battery 3001 may be connected to the positive terminal (+) of the battery 3004 through an electric power path passing through the terminal P2, the line LN3, the bypass device 2001_4, the line LN2, the first node N1, the line LN5, the bypass device 2001_3, the line LN8, and the terminal P7. The negative terminal (-) of the battery 3004 may be connected to the negative terminal (-) of the capacitor 621 through an electric power path passing through the terminal P8.

[0153] In the battery charging system 1_6, the charger 620 can supply power to the two batteries 3001 and 3004 through the two bypass devices 2001_3 and 2001_4.

[0154] In the case where the processor 101 determines that the battery 3004 between the two batteries 3001 and 3004 is fully charged first, the processor 101 may rotate the bypass device 2001_3 in response to the control signal CS2.

[0155] Fig.10 It is a picture Fig. 9 1 is a circuit diagram of a power path for connecting one of four batteries to a charger according to an embodiment when one of the two bypass devices illustrated in FIG. 1 is rotated 90 degrees clockwise.

[0156] refer to Fig.10 The battery charging system 1_7 may include a processor 101, a charger 620, and a plurality of bypass devices 2001_4 and 2001_5. Fig. 9 The bypass device 2001_3 shown in the figure is rotated 90 degrees clockwise to realize the bypass device 2001_5.

[0157] Fig.10 The bypass devices 2001_4 and 2001_5 shown in the figure can be implemented as having Figure 1 The bypass device 200 shown in FIG.

[0158] Fig.10 The battery charging system 1_7 shown in the figure can be in Fig. 9 In the state where the bypass device 2001_3 among the plurality of bypass devices 2001_3 and 2001_4 of the battery charging system 1_9 shown in the figure is rotated 90 degrees clockwise or 270 degrees counterclockwise.

[0159] Hereinafter, descriptions of the processor 101, the charger 620, the plurality of bypass devices 2001_4 and 2001_5, and the plurality of batteries 3001 to 3004, which are the same components as those mentioned above, may be omitted.

[0160] The bypass device 2001_5 may include a node connection module 2230_2, and the node connection module 2230_2 may include a first contact portion 2232a_2, a connection portion 2231_2, and a second contact portion 2232b_2.

[0161] The bypass device 2001_4 may rotate at an angle at which the first contact portion 2232a_1 may contact the terminal P201_1 and the second contact portion 2232b_1 may contact the terminal P201_2. The processor 101 may implement the control signal CS1 in response to the control signal CS2. Fig.10 Bypass device 2001_4 shown in the figure. Fig.10 The rotation angle of the bypass device 2001_4 shown in the figure can be equal to Fig. 9 The rotation angle of the bypass device 2001_4 shown in the figure.

[0162] The bypass device 2001_5 may rotate at an angle at which the first contact portion 2232a_2 may contact the terminal P202_4 and the second contact portion 2232b_2 may contact the terminal P202_1. The processor 101 may respond to the control signal CS2 by Fig. 9 The bypass device 2001_3 shown in the figure is rotated 90 degrees clockwise to achieve Fig.10 Bypass device 2001_5 shown in the figure.

[0163] In the battery charging system 1_7, the positive terminal (+) of the capacitor 621 may be connected to the positive terminal (+) of the battery 3001 through an electric power path passing through the terminal P1. The negative terminal (-) of the battery 3001 may be connected to the negative terminal (-) of the capacitor 621 through an electric power path passing through the terminal P2, the line LN3, the bypass device 2001_4, the line LN2, the first node N1, the line LN5, the bypass device 2001_3, and the line LN6.

[0164] In the battery charging system 1_7, the charger 620 can supply power to the single battery 3001 through the two bypass devices 2001_4 and 2001_5.

[0165] Fig.11 is a flowchart illustrating a battery charging method according to an embodiment.

[0166] In the following, reference will be made to Figure 1 The flowchart in 11 will be described with reference to the battery charging system 1 illustrated in FIG. Descriptions of the processor 100, the charger 120, the bypass device 200, and the plurality of batteries 3001 and 3002, which are the same as the components mentioned above, may be omitted.

[0167] refer to Fig.11 , the processor 100 may receive a plurality of voltage measurement signals VP1 , VN1 , VP2 , and VN2 from opposite ends of each of the plurality of batteries 3001 and 3002 ( S100 ).

[0168] The processor 100 may derive opposite terminal voltages of each of the plurality of batteries 3001 and 3002 based on the plurality of voltage measurement signals VP1 , VN1 , VP2 , and VN2 ( S200 ).

[0169] The processor 100 may generate a control signal CS for electrically disconnecting a battery corresponding to an opposite terminal voltage equal to or higher than a predetermined reference voltage among the plurality of batteries 3001 and 3002 from the charger, and may transmit the control signal CS to the bypass device 200 (S300).

[0170] The bypass device 200 receiving the control signal CS may rotate according to the rotation direction and rotation angle indicated by the control signal CS ( S400 ).

[0171] refer to Figure 3 and Figure 4 , when Figure 3 In the state shown in FIG. 1 , when the processor 100 determines that the voltages at opposite ends of the battery 3001 are equal to or higher than the reference voltage while the charger 120 is charging the two batteries 3001 and 3002, the processor 100 may generate a control signal CS for electrically disconnecting the battery 3001 from the charger 120, and send the control signal CS to the bypass device 200. The control signal CS for electrically disconnecting the battery 3001 from the charger 120 may include a signal instructing the bypass device 200 to rotate 90 degrees clockwise.

[0172] The bypass device 200 that receives the control signal CS instructing the bypass device 200 to rotate 90 degrees clockwise can rotate 90 degrees clockwise, such as Figure 4 Medium picture.

[0173] Return to reference Fig.11 , the charger 120 may charge at least one battery connected to opposite ends thereof ( S500 ).

[0174] exist Figure 3 In the example of , the charger 120 can charge two batteries 3001 and 3002 connected to opposite ends thereof. Figure 4 In the example of FIG. 1 , the charger 120 can charge the battery 3002 connected to opposite ends thereof.

[0175] Although the embodiments of the present disclosure are described in detail above, the protection scope of the present disclosure is not limited thereto, and those skilled in the art may make various changes and modifications, and these changes and modifications belong to the protection scope of the present disclosure.

Claims

1. A battery charging system, the battery charging system being connected to opposite ends of each of a plurality of batteries, the battery charging system comprising: a charger configured to supply electric power; a bypass device configured to rotate about a central axis and configured to provide a power path connecting at least one of the first battery and the second battery to opposite ends of the charger; as well as A processor is configured to monitor voltages across opposite ends of each of the first battery and the second battery and control a rotation direction and a rotation angle of the bypass device.

2. The battery charging system according to claim 1, wherein: The bypass device comprises: a first board including a plurality of bypass nodes electrically and respectively connected to a positive terminal of the charger, a negative terminal of the charger, a negative terminal of the first battery, and a positive terminal of the second battery; and A second board includes a node connection module configured to rotate in response to a control signal of the processor and to electrically connect two nodes among the plurality of bypass nodes indicated by the control signal.

3. The battery charging system according to claim 2, wherein: A positive terminal of the charger is connected to a positive terminal of the first battery, and a negative terminal of the charger is connected to a negative terminal of the second battery.

4. The battery charging system according to claim 3, wherein: When the node connection module electrically connects a node connected to a negative terminal of the first battery and a node connected to a positive terminal of the second battery, the charger supplies power to the first battery and the second battery.

5. The battery charging system according to claim 3, wherein: When the node connection module electrically connects a node connected to the negative terminal of the first battery and a node connected to the negative terminal of the charger, the charger supplies power to the first battery.

6. The battery charging system according to claim 3, wherein: When the node connection module electrically connects a node connected to the positive terminal of the second battery and a node connected to the positive terminal of the charger, the charger supplies power to the second battery.

7. The battery charging system according to claim 1, wherein: The processor compares a voltage across opposite ends of each of the first battery and the second battery with a predetermined reference voltage, and controls the bypass device to electrically disconnect the battery between the first battery and the second battery corresponding to a voltage across opposite ends equal to or higher than the reference voltage from the positive terminal and the negative terminal of the charger.

8. A battery charging method, comprising: receiving a plurality of voltage measurement signals from opposite ends of each of the first battery and the second battery; deriving a voltage across opposite ends of each of the first battery and the second battery based on the voltage measurement signal; comparing a voltage across opposite ends of each of the first battery and the second battery with a predetermined reference voltage and generating a control signal; rotating a bypass device receiving the control signal about a central axis and providing a power path connecting at least one of the first battery and the second battery to opposite ends of a charger; as well as Power is supplied to at least one battery by the charger.

9. The battery charging method according to claim 8, wherein: The supplying of electric power includes supplying electric power to the first battery and the second battery when the bypass device electrically connects a node connected to the negative terminal of the first battery and a node connected to the positive terminal of the second battery.

10. The battery charging method according to claim 8, wherein: The supplying of the electric power includes supplying the electric power to the first battery when the bypass device electrically connects a node connected to the negative terminal of the first battery and a node connected to the negative terminal of the charger.

11. The battery charging method according to claim 8, wherein: The supplying of electric power includes supplying electric power to the second battery when the bypass device electrically connects a node connected to the positive terminal of the second battery and a node connected to the positive terminal of the charger.

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