A power supply system and an electronic device

Abstract

The present invention relates to a power supply system and an electronic device, comprising: a battery pack, a BMS control module and a connection terminal, a first power supply path connecting the battery pack and the BMS control module, a second power supply path connecting the connection terminal and the BMS control module, a third power supply path connecting the battery pack and the connection terminal, and a data path connecting the battery pack and the BMS control module; the first power supply path includes a first power conversion module, a first switch and a first isolation module connected in cascade with each other, wherein the first switch is connected to the first level output terminal of the BMS control module; the second power supply path includes a second power conversion module, a power-on detection module and a second isolation module connected in cascade with each other, wherein the BMS control module is connected to the power-on detection module; the third power supply path includes a second switch and a bidirectional inverter module connected in cascade with each other, and the second switch is connected to the BMS control module. Implementing the present invention can improve the battery service life, and the circuit is simple with low cost.

Description

Technical Field

[0001] The present invention relates to the field of power electronics technology, and more particularly, to a power supply system and an electronic device. Background Art

[0002] The commonly used off-grid energy storage systems currently usually need to be powered on and started by means of an external UPS, which will lead to complex system circuits and increased costs. In addition, when the commonly used off-grid energy storage systems are in the off-grid state, the internal working modules are usually powered by the internal battery, and their long-term operation will cause the consumption of battery power and reduce the service life of the battery. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a power supply system and an electronic device for the above-mentioned partial technical defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is to construct a power supply system, including: a battery pack, a BMS control module, and a connection end for connecting a load or a grid input, and

[0005] a first power supply path connecting the power supply end of the battery pack to the power supply end of the BMS control module, a second power supply path connecting the connection end to the power supply end of the BMS control module, a third power supply path connecting the power supply end of the battery pack to the connection end, and a data path connecting the data end of the battery pack to the data end of the BMS control module;

[0006] The first power supply path includes a first power conversion module, a first switch, and a first isolation module connected in cascade, wherein the first switch is connected to the first level output end of the BMS control module and is configured to be turned off when the BMS control module outputs the first level;

[0007] The second power supply path includes a second power conversion module, a power-on detection module, and a second isolation module connected in cascade, wherein the BMS control module is connected to the power-on detection module and is configured to output the first level when receiving the power-on detection level of the power-on detection module;

[0008] The third power supply path includes a second switch and a bidirectional inverter module connected in cascade, wherein the second switch is connected to the second level output end of the BMS control module and is configured to be turned on when the BMS control module outputs the second level.

[0009] Preferably, the second switch includes a first normally open contactor and a second normally open contactor;

[0010] The first contact connection end of the first normally open contactor is connected to the positive power output end of the battery pack, the second contact connection end of the first normally open contactor is connected to the bidirectional inverter module, and the coil of the first normally open contactor is connected to the second level output end of the BMS control module;

[0011] The first contact connection end of the second normally open contactor is connected to the negative power output end of the battery pack, the second contact connection end of the second normally open contactor is connected to the bidirectional inverter module, and the coil of the second normally open contactor is connected to the second level output end of the BMS control module.

[0012] Preferably, the first power path further includes a first circuit breaker,

[0013] The first end of the first circuit breaker is connected to the power supply end of the battery pack, and the second end of the first circuit breaker is connected to the input end of the first power conversion module.

[0014] Preferably, the first switch includes a first relay,

[0015] The first contact connection end of the first relay is connected to the output end of the first power conversion module, the second contact connection end of the first relay is connected to the first isolation module, and the coil of the first relay is connected to the first level output end of the BMS control module.

[0016] Preferably, the first power conversion module includes a DCDC converter, and the first contact connection end of the first relay is connected to the positive output end of the DCDC converter.

[0017] Preferably, the first isolation module includes a first diode, the anode of the first diode is connected to the first contact connection end of the first relay, and the cathode of the first diode is connected to the power supply end of the BMS control module.

[0018] Preferably, the second power path further includes a second circuit breaker;

[0019] The first end of the second circuit breaker is connected to the connection end, and the second end of the second circuit breaker is connected to the input end of the second power conversion module.

[0020] Preferably, the second power conversion module includes an ACDC converter. The input end of the ACDC converter is connected to the second end of the second circuit breaker. The positive output end of the ACDC converter is connected to the first end of the second isolation module and the first end of the power-on detection module. The negative output end of the ACDC converter is connected to the second end of the power-on detection module. The second end of the second isolation module is connected to the power supply end of the BMS control module.

[0021] Preferably, the power-on detection module includes a second relay. The first end of the coil of the second relay is connected to the positive output end of the AC-DC converter, and the second end of the coil of the second relay is connected to the negative output end of the AC-DC converter. The first contact connection end and the second contact connection end of the second relay are respectively connected to the BMS control module.

[0022] Preferably, the second isolation module includes a second diode. The anode of the second diode is connected to the positive output end of the AC-DC converter, and the cathode of the second diode is connected to the power supply end of the BMS control module.

[0023] The present invention also constructs an electronic device, including the power supply system described in any one of the above.

[0024] Implementing a power supply system and an electronic device of the present invention has the following beneficial effects: improving the battery service life, with a simple circuit and low cost. Description of the Drawings

[0025] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0026] Figure 1 is a schematic structural diagram of an embodiment of a power supply system of the present invention;

[0027] Figure 2 is a schematic circuit diagram of an embodiment of a power supply system of the present invention. Detailed Embodiments

[0028] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the drawings.

[0029] As Figure 1 and Figure 2As shown in the figure, in a first embodiment of a power supply system according to the present invention, it includes: a battery pack 110, a BMS control module 120, a connection end 160 for connecting a load 200 or a grid input 300, a first power supply path 130 connecting the power supply end of the battery pack 110 and the power supply end of the BMS control module 120, a second power supply path 140 connecting the connection end 160 and the power supply end of the BMS control module 120, a third power supply path 150 connecting the power supply end of the battery pack 110 and the connection end 160, and a data path 170 connecting the data end of the battery pack 110 and the data end of the BMS control module 120; the first power supply path 130 includes a first power conversion module 131, a first switch 132, and a first isolation module 133 that are cascaded with each other. Among them, the first switch 132 is connected to the first level output end of the BMS control module 120 and is configured to turn off when the BMS control module 120 outputs a first level; the second power supply path 140 includes a second power conversion module 141, a power-on detection module 142, and a second isolation module 143 that are cascaded with each other. Among them, the BMS control module 120 is connected to the power-on detection module 142 and is configured to output a first level when receiving the power-on detection level of the power-on detection module 142; the third power supply path 150 includes a second switch 151 and a bidirectional inverter module 152 that are cascaded with each other. Among them, the second switch 151 is connected to the second level output end of the BMS control module 120 and is configured to turn on when the BMS control module 120 outputs a second level. Specifically, when the system is working and the battery pack 110 is connected and its connection end 160 is connected to the load 200, the power output of the battery pack 110 supplies power to the BMS control module 120 through the first power supply path 130 formed by cascading the first power conversion module 131, the first switch 132, and the first isolation module 133. Among them, the power output of the battery pack 110 is converted by the first power conversion module 131 to obtain the working voltage required by the BMS control module 120 to supply power to the BMS control module 120. Specifically, it can be input to the BMS control module 120 through the first switch 132 and the first isolation module 133 in sequence after being converted by the first power conversion module 131. After the BMS control module 120 is powered on through the first power supply path 130 and enters the working state, it can receive the data of the battery pack 110 through the data path 170 and output a corresponding control level according to the analysis result of the data. That is, it can output a second level through its second level output end. Among them, the data path 170 can be directly a path formed by connecting the data end of the battery pack 110 to the data end of the BMS control module 120. It can include the battery voltage acquisition data of the battery pack, the temperature acquisition data of the battery pack, and the current acquisition data of the battery pack. This data acquisition process can adopt currently common acquisition technologies.The second switch 151 in the third power supply path 150 conducts after receiving the second level, and the third power supply path 150 starts to conduct. At this time, the power output of the battery pack 110 supplies power to the load 200 through the third power supply path 150 to enable the load 200 to work properly. Specifically, the bidirectional inverter module 152 in the third power supply path 150 performs voltage conversion to obtain the working voltage of the load 200 required for the load 200 to work to maintain the normal operation of the load 200. In a scenario, when the BMS control module 120 determines that the battery pack 110 is abnormal based on the data of the battery pack 110 received through the data path 170 or determines that the battery pack 110 is in a long-term standby state through this data, it outputs a first level through the first level output terminal to trigger the first switch 132 to disconnect. At this time, the first power supply path 130 is disconnected, and the battery pack 110 stops supplying power to the BMS control module 120 to reduce the power consumption of the battery pack 110. When the connection terminal 160 is connected to the grid input 300, its second power supply path 140 conducts. At this time, the AC input of the connection terminal 160 is converted by the second power conversion module 141 in the second power supply path 140 to output the required supply voltage to the BMS control module 120. It can be that the output of the second power conversion module 141 is input to the BMS control module 120 after passing through the power-on detection module 142 and the second isolation module 143 in sequence. The BMS control module 120 works at this time through the voltage provided by the second power supply path 140. It can also be understood that at this time, the BMS control module 120 works through AC input power supply. When the second power supply path 140 conducts, the power-on detection module 142 in the second power supply path 140 detects that the second power supply path 140 is in a conducting state at this time, and outputs the corresponding level to the BMS control module 120. The BMS control module 120 outputs a first level through its first level output terminal when receiving this level, that is, the power-on detection level, to trigger the first switch 132 to turn off, that is, to turn off the first power supply path 130. At this time, the power supply of the battery pack 110 to the BMS control module 120 through the first power supply path 130 is cut off. When the BMS control module 120 works, it outputs a second level to trigger the second switch 151 to conduct. At this time, the AC input of the connection terminal 160 charges the battery pack 110 through the third power supply path 150. Among them, the bidirectional inverter module 152 converts the AC input of the grid to obtain the charging voltage of the battery pack 110.

[0030] Optionally, such as Figure 2As shown in the figure, the second switch 151 includes a first normally open contactor 1511 and a second normally open contactor 1512; the first contact connection end of the first normally open contactor 1511 is connected to the positive power output end of the battery pack 110, the second contact connection end of the first normally open contactor 1511 is connected to the bidirectional inverter module 152, and the coil of the first normally open contactor 1511 is connected to the second level output end of the BMS control module 120; the first contact connection end of the second normally open contactor 1512 is connected to the negative power output end of the battery pack 110, the second contact connection end of the second normally open contactor 1512 is connected to the bidirectional inverter module 152, and the coil of the second normally open contactor 1512 is connected to the second level output end of the BMS control module 120. Specifically, the second switch 151 consists of two normally open contactors. Among them, the contacts of the first normally open contactor 1511 are connected to the positive power output end of the battery pack 110, the contacts of the second normally open contactor 1512 are connected to the negative power output end of the battery pack 110, and the coils of the first normally open contactor 1511 and the second normally open contactor are both connected to the BMS control module 120 and are powered on by the second level output by the BMS control module 120. After the coils of the first normally open contactor 1511 and the second normally open contactor 1512 are powered on by the second level, their contacts are switched from the normally open state to the closed state respectively.

[0031] Optionally, the first power path 130 further includes a first circuit breaker 134. The first end of the first circuit breaker 134 is connected to the power supply end of the battery pack 110, and the second end of the first circuit breaker 134 is connected to the input end of the first power conversion module 131. Specifically, the first power path 130 can trigger its conduction or cut-off by setting the first circuit breaker 134. That is, the power supply system can be triggered to work by closing the first circuit breaker 134.

[0032] Optionally, the first switch 132 includes a first relay K1. The first contact connection end of the first relay K1 is connected to the output end of the first power conversion module 131, the second contact connection end of the first relay K1 is connected to the first isolation module 133, and the coil of the first relay K1 is connected to the first level output end of the BMS control module 120. Specifically, the first switch 132 can adopt a relay, that is, the first relay K1. The first power path 130 can control the conduction or cut-off state of the path by the closing or opening of the contacts of the first relay K1. Among them, the coil of the first relay K1 is connected to the BMS control module 120 and is powered on by the first level output by the BMS control module 120 to trigger the closing or opening of its contacts.

[0033] Optionally, the first power conversion module 131 includes a DCDC converter. The first contact connection terminal of the first relay K1 is connected to the positive output terminal of the DCDC converter. Specifically, in the first power path 130, the power output of the battery pack 110 is voltage-converted by the DCDC converter to obtain voltage outputs of +24V and -24V, and the contact of the first relay K1 is connected to the +24V power output.

[0034] Optionally, the first isolation module 133 includes a first diode. The anode of the first diode is connected to the first contact connection terminal of the first relay K1, and the cathode of the first diode is connected to the power supply terminal of the BMS control module 120. Specifically, the first power path 130 isolates the second power path 140 through the first isolation module 133 to prevent the power input in the second power path 140 from flowing back into the first power path 130.

[0035] Optionally, the second power path 140 further includes a second circuit breaker 144; the first end of the second circuit breaker 144 is connected to the connection terminal 160, and the second end of the second circuit breaker 144 is connected to the input terminal of the second power conversion module 141. Specifically, the second power path 140 can be triggered to conduct or turn off by setting the second circuit breaker 144. That is, when the power grid is connected to the connection terminal 160, the power system can be triggered to work by closing the second circuit breaker 144.

[0036] Optionally, the second power conversion module 141 includes an ACDC converter. The input terminal of the ACDC converter is connected to the second end of the second circuit breaker 144. The positive output terminal of the ACDC converter is connected to the first end of the second isolation module 143 and the first end of the power-on detection module 142. The negative output terminal of the ACDC converter is connected to the second end of the power-on detection module 142. The second end of the second isolation module 143 is connected to the power supply terminal of the BMS control module 120. Specifically, the AC input of the connection terminal 160 is converted by the ACDC converter to obtain voltage outputs of +24V and -24V. Among them, the second isolation module 143 is connected to the positive output terminal of the ACDC converter, and the power-on detection module 142 is connected between the positive output terminal and the negative output terminal of the ACDC converter and is used to power on and output a power-on detection level when the ACDC converter has an output.

[0037] Optionally, the power-on detection module 142 includes a second relay K2. The first end of the coil of the second relay K2 is connected to the positive output terminal of the AC-DC converter, and the second end of the coil of the second relay K2 is connected to the negative output terminal of the AC-DC converter. The first contact connection end and the second contact connection end of the second relay K2 are respectively connected to the BMS control module 120. Specifically, in the power-on detection module 142, the coil of its second relay K2 is connected to the positive output terminal of the AC-DC converter, and the contacts of the second relay K2 are connected to the BMS control module 120. When the AC-DC converter has a voltage output, the coil is powered on to trigger the action of its contacts to generate a corresponding level signal, that is, the power-on detection level.

[0038] Optionally, the second isolation module 143 includes a second diode. The anode of the second diode is connected to the positive output terminal of the AC-DC converter, and the cathode of the second diode is connected to the power supply terminal of the BMS control module 120. Specifically, the second power path 140 isolates the first power path 130 through the second isolation module 143 to prevent the power input in the first power path 130 from flowing back to the second power path 140. It is specifically isolated by a diode.

[0039] In addition, an electronic device of the present invention includes any of the above power systems, that is, it can supply power to the internal working circuit through any of the above systems.

[0040] It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention patent; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A power supply system, characterized in that, Comprising: A battery pack, a BMS control module, and a connection terminal for connecting to a load or grid input, and A first power path connecting the power supply terminal of the battery pack to the power supply terminal of the BMS control module, a second power path connecting the connection terminal to the power supply terminal of the BMS control module, a third power path connecting the power supply terminal of the battery pack to the connection terminal, and a data path connecting the data terminal of the battery pack to the data terminal of the BMS control module; The first power path includes a first power conversion module, a first switch, and a first isolation module connected in cascade, wherein the first switch is connected to the first level output terminal of the BMS control module and is configured to turn off when the BMS control module outputs a first level; The second power path includes a second power conversion module, a power-on detection module, and a second isolation module connected in cascade, wherein the BMS control module is connected to the power-on detection module and is configured to output the first level when receiving the power-on detection level of the power-on detection module; The third power path includes a second switch and a bidirectional inverter module connected in cascade, wherein the second switch is connected to the second level output terminal of the BMS control module and is configured to turn on when the BMS control module outputs a second level; Wherein, when the connection terminal is connected to a power input, the BMS control module is powered by the second power path, receives the power-on detection level generated by the power-on detection module, outputs the second level, and the AC input of the connection terminal charges the battery pack through the third power path; The second power path further includes a second circuit breaker; The first end of the second circuit breaker is connected to the connection terminal, and the second end of the second circuit breaker is connected to the input end of the second power conversion module; The second power conversion module includes an AC-DC converter, the input end of the AC-DC converter is connected to the second end of the second circuit breaker, the positive output end of the AC-DC converter is connected to the first end of the second isolation module and the first end of the power-on detection module, the negative output end of the AC-DC converter is connected to the second end of the power-on detection module, and the second end of the second isolation module is connected to the power supply terminal of the BMS control module.

2. The power supply system according to claim 1, wherein The second switch includes a first normally open contactor and a second normally open contactor; The first contact connection end of the first normally open contactor is connected to the positive power output terminal of the battery pack, the second contact connection end of the first normally open contactor is connected to the bidirectional inverter module, and the coil of the first normally open contactor is connected to the second level output terminal of the BMS control module; The first contact connection end of the second normally open contactor is connected to the negative power output terminal of the battery pack, the second contact connection end of the second normally open contactor is connected to the bidirectional inverter module, and the coil of the second normally open contactor is connected to the second level output terminal of the BMS control module.

3. The power supply system according to claim 1, characterized in that, The first power path further includes a first circuit breaker, The first end of the first circuit breaker is connected to the power supply end of the battery pack, and the second end of the first circuit breaker is connected to the input end of the first power conversion module.

4. The power supply system according to claim 1, wherein The first switch includes a first relay. The first contact connection end of the first relay is connected to the output end of the first power conversion module, the second contact connection end of the first relay is connected to the first isolation module, and the coil of the first relay is connected to the first level output end of the BMS control module.

5. The power supply system according to claim 4, wherein The first power conversion module includes a DCDC converter, and the first contact connection end of the first relay is connected to the positive output end of the DCDC converter.

6. The power supply system according to claim 4, wherein, The first isolation module includes a first diode. The anode of the first diode is connected to the first contact connection end of the first relay, and the cathode of the first diode is connected to the power supply end of the BMS control module.

7. The power supply system according to claim 1, wherein The power-on detection module includes a second relay. The first end of the coil of the second relay is connected to the positive output end of the ACDC converter, the second end of the coil of the second relay is connected to the negative output end of the ACDC converter, and the first contact connection end and the second contact connection end of the second relay are respectively connected to the BMS control module.

8. The power supply system according to claim 1, wherein, The second isolation module includes a second diode. The anode of the second diode is connected to the positive output end of the ACDC converter, and the cathode of the second diode is connected to the power supply end of the BMS control module.

9. An electronic device, characterized in that, It includes the power supply system according to any one of claims 1 to 8.

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