# US 2026/0246286 A1 · Dc power supply device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0246286 A1 - Document ID: US20260246286A1 - Status: Published application - Kind: A1 - Application number: 19/461,747 - Filed: 2026-01-28 - Published: 2026-08-20 - Earliest claimed: 2025-02-14 - Assignees: APh ePower Co., Ltd. - Applicants: APh ePower Co., Ltd. - Inventors: Hsiu-Hsien Su; Yi Jun Lin; Kuan-Chieh Huang - Web page: https://patentgrep.com/patent/US20260246286A1 ## CPC - H02J 7/585: {Sequential battery discharge in systems with a plurality of batteries} - H02J 7/855: {with circuits adapted for supplying loads from the battery} - H02J 1/106: {for load balancing, symmetrisation, or sharing} - H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence) - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - H02J 7/68: using circuits for correcting or protecting against reverse-polarity - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02J 2207/20: Charging or discharging characterised by the power electronics converter - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A DC power supply device is provided. The DC power supply device includes a DC power bus, a first detection circuit, a second detection circuit, battery modules and a management circuit. The first detection circuit detects an external power source entering the DC power bus. The second detection circuit detects a load status on the DC power bus. The plurality of battery modules is respectively assembled to the DC power bus in a detachable manner. When the DC power bus does not receive external power source, the management circuit adjusts the power supply quantity of assembled battery modules assembled the DC power bus to according to the load status. ## Claims ### Claim 1 A DC power supply device, comprising: a DC power bus; a first detection circuit, coupled to the DC power bus and configured to detect an external power source entering the DC power bus; a second detection circuit, coupled to the DC power bus and configured to detect a load status at the DC power bus; a plurality of battery modules, each detachably assembled to the DC power bus; and a management circuit, communicating with the first detection circuit, the second detection circuit, and a plurality of assembled battery modules assembled to the DC power bus and configured to adjust a power supply quantity of the assembled battery modules based on the load status in response to the DC power bus not receiving the external power source. ### Claim 2 (depends on 1) The DC power supply device according to claim 1, wherein in response to the DC power bus not receiving the external power source and the load status indicating a heavy load, the management circuit controls the assembled battery modules to power the DC power bus. ### Claim 3 (depends on 1) The DC power supply device according to claim 1, wherein in response to the DC power bus not receiving the external power source and the load status indicating a light load, the management circuit controls one of the assembled battery modules to power the DC power bus. ### Claim 4 (depends on 1) The DC power supply device according to claim 1, wherein in response to the load status indicating that a load of the DC power bus increases and that the DC power bus is not receiving the external power source, the management circuit increases a power supply quantity of the assembled battery modules. ### Claim 5 (depends on 1) The DC power supply device according to claim 1, wherein in response to the load status indicating that a load of the DC power bus decreases and that the DC power bus is not receiving the external power source, the management circuit reduces a power supply quantity of the assembled battery modules. ### Claim 6 (depends on 1) The DC power supply device according to claim 1, wherein in response to the load status indicating that a load power of the DC power bus is lower than an external power of the external power source, the management circuit utilizes the external power source to power a load element connected to the DC power bus and the assembled battery modules. ### Claim 7 (depends on 6) The DC power supply device according to claim 6, wherein in response to the load status indicating that the load power of the DC power bus is lower than the external power of the external power source, the management circuit powers the load element based on a remaining battery of the assembled battery modules. ### Claim 8 (depends on 1) The DC power supply device according to claim 1, wherein the management circuit determines a discharge order of the assembled battery modules based on a remaining battery of the assembled battery modules. ### Claim 9 (depends on 1) The DC power supply device according to claim 1, wherein one of the battery modules comprises: a battery cell; a battery status detection circuit, coupled to the battery cell and configured to detect a status of the battery cell; a bidirectional power converter, coupled to the battery cell; and a controller, coupled to the bidirectional power converter and the battery status detection circuit and configured to control the bidirectional power converter to perform one of charging and discharging the battery cell in response to the bidirectional power converter being connected to the DC power bus. ### Claim 10 (depends on 9) The DC power supply device according to claim 9, wherein the bidirectional power converter comprises: a capacitor, coupled between a positive power supply terminal of the battery cell and a negative power supply terminal of the battery cell; an inductor, a first terminal of the inductor coupled to a positive power supply terminal of the battery cell; a first power switch, a first terminal of the first power switch coupled to a second terminal of the inductor, a second terminal of the first power switch coupled to a positive connection terminal of the bidirectional power converter, and a control terminal of the first power switch coupled to the controller to receive a first switch signal; and a second power switch, a first terminal of the second power switch coupled to a second terminal of the inductor, a second terminal of the second power switch coupled to a negative connection terminal of the bidirectional power converter, and a control terminal of the second power switch coupled to the controller to receive a second switch signal. ### Claim 11 (depends on 10) The DC power supply device according to claim 10, wherein in response to the bidirectional power converter being assembled to the DC power bus, a positive connection terminal of the bidirectional power converter is connected to a positive power supply line of the DC power bus, and a negative connection terminal of the bidirectional power converter is connected to a negative power supply line of the DC power bus. ### Claim 12 (depends on 10) The DC power supply device according to claim 10, wherein the first power switch comprises: a diode, an anode of the diode coupled to a first terminal of the first power switch, and a cathode of the diode coupled to a second terminal of the first power switch; and a power transistor, a first terminal of the power transistor coupled to a first terminal of the first power switch, a second terminal of the power transistor coupled to a second terminal of the first power switch, a control terminal of the power transistor coupled to a control terminal of the first power switch. ### Claim 13 (depends on 12) The DC power supply device according to claim 12, wherein: in response to the bidirectional power converter being assembled to the DC power bus and the battery cell performing discharging, the power transistor is turned off based on the first switch signal, the second power switch performs switch operation based on a duty cycle of the second switch signal, and the duty cycle is greater than 0. ### Claim 14 (depends on 13) The DC power supply device according to claim 13, wherein electrical energy provided by the bidirectional power converter is determined by the duty cycle. ### Claim 15 (depends on 13) The DC power supply device according to claim 13, wherein in response to the bidirectional power converter being assembled to the DC power bus and the battery cell performing discharging, electrical energy stored in the inductor is provided to the DC power bus via the diode. ### Claim 16 (depends on 12) The DC power supply device according to claim 12, wherein: in response to the bidirectional power converter being assembled to the DC power bus and the battery cell performing charging, the second power switch is turned off based on the second switch signal, the power transistor performs switch operation based on a duty cycle of the first switch signal, and the duty cycle is greater than 0.