CN220775433U - Charger and charging system - Google Patents

Abstract

A charger and charging system, the charger includes the input interface, include the direct-flow power interface connected with direct-flow bus and auxiliary power interface connected with auxiliary power bus; a charging control board; the charging gun is connected with the gardening tool and comprises a first auxiliary power output end and a direct current output end, and the first auxiliary power output end is connected with an auxiliary power interface; the input end of the power output module is connected with the direct current power supply interface, and the output end of the power output module is connected with the direct current output end; and the control switch is arranged between the first auxiliary power output end and the auxiliary power interface. The charger adopts a controlled auxiliary power supply design, and can disconnect the auxiliary power supply for the BMS of the gardening tool under the gun inserting state, and the BMS does not work, so that the energy consumption during the gun inserting state is reduced.

Description

Charger and charging system

Technical Field

The application belongs to the technical field of energy storage systems, and particularly relates to a charger and a charging system.

Background

The energy storage system is used as an energy hub in the power system, management on a demand side and electric energy output can be achieved, long-time endurance can be provided for other electric tools in an outdoor operation process, for example, in the field of garden tools, when electric quantity of the nearby garden tools in use is exhausted, the energy storage system charges the garden tools through a charger.

The auxiliary power supply for supplying power to the battery management unit of the gardening tool in the existing charger is directly used for taking power from an auxiliary power bus and is an uncontrollable power supply. When the charging gun of the charger is plugged into the charging socket of the garden tool, the battery management system in the garden tool can be electrified to work immediately, however, the starting time of the whole energy storage system is usually more than 5s, and the battery management unit in the garden tool is abnormal in interaction with the charging of the charger in the period of time when the energy storage system is started, so that the abnormal alarm of the battery management unit in the garden tool is caused, and the abnormal alarm can be eliminated only by reinserting the charging gun after the charging gun is pulled out, so that the user experience is affected, and the energy consumption of the energy storage system is increased.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present application is to provide a charger and a charging system.

To achieve the above and other related objects, the present application provides a charger comprising:

the input interface comprises an auxiliary power interface, and the auxiliary power interface is connected with an external auxiliary power bus;

a charging control board;

the charging gun is connected with the gardening tool and comprises a first auxiliary power output end which is connected with the auxiliary power interface;

and

The control switch is arranged between the first auxiliary power output end and the auxiliary power interface;

the control switch is used for switching the working state according to the control signal of the charging control board so that the first auxiliary power output end does not output auxiliary power outwards before the fact that the plug-in state of the charging gun and the charging socket of the gardening tool is normal is confirmed.

In an optional embodiment of the present application, the charging control board includes an auxiliary power input end and a second auxiliary power output end, the auxiliary power input end is connected with the auxiliary power interface, the second auxiliary power output end is connected with the auxiliary power input end through the control switch, and the second auxiliary power output end is connected with the first auxiliary power output end.

In an alternative embodiment of the present application, the control switch is integrated on the charge control board.

In an optional embodiment of the present application, the charging control device further includes a power output module, the power output module is in communication connection with the charging control board, an input end of the power output module is connected with an external dc bus, and an output end of the power output module is connected with the charging gun.

In an optional embodiment of the present application, the charging control board further includes a control unit, where the control unit is connected to the power output module and the control switch, and the control unit is configured to control a switching state of the control switch, and is further configured to control a working state of the power output module.

In an optional embodiment of the present application, the power supply device further includes an output relay, the output relay is disposed between an output end of the power output module and the charging gun, and the charging control board is used for controlling switching of an operating state of the output relay.

In an optional embodiment of the present application, the charging control board further includes a dc input end, a step-down module, and a relay power supply end, the input end of the step-down module is connected with an external dc bus through the dc input end, and the output end of the step-down module is connected with the coil of the output relay through the relay power supply end, and the output of the step-down module is controlled to switch the working state of the output relay.

In an optional embodiment of the present application, the output end of the power output module is connected with the dc output end through a cable, and a diameter of the cable is greater than or equal to 5mm.

In an alternative embodiment of the present application, the charging control board is connected to the power output module through a 485 bus.

In an alternative embodiment of the present application, the power output module includes a plurality of DC/DC modules, and the plurality of DC/DC modules are disposed in parallel between the input interface and the DC output end of the charging gun.

In an alternative embodiment of the present application, the charging control board communicates with an external CAN bus through a first CAN communication interface on the input interface, and the charging control board communicates with the garden tool through a second CAN communication interface on the charging gun.

In an optional embodiment of the present application, the control switch includes a MOS transistor.

To achieve the above and other related objects, the present application provides a charging system comprising:

a gardening tool; and

a charger, comprising:

the input interface comprises a direct current power interface and an auxiliary power interface, wherein the direct current power interface is connected with an external direct current bus, and the auxiliary power interface is connected with an external auxiliary power bus;

a charging control board;

the charging gun is matched with the charging socket of the gardening tool and comprises a first auxiliary power output end and a direct current output end, the first auxiliary power output end is connected with the auxiliary power interface, and the first auxiliary power output end is connected with the battery management system of the gardening tool;

the power output module is in communication connection with the charging control board, the input end of the power output module is connected with the direct current power supply interface, and the output end of the power output module is connected with the direct current output end; and

the control switch is arranged between the first auxiliary power output end and the auxiliary power interface;

the control switch is used for switching the working state according to the control signal of the charging control board so that the first auxiliary power output end does not output auxiliary power outwards before the fact that the plug-in state of the charging gun and the charging socket of the gardening tool is normal is confirmed.

In an alternative embodiment of the present application, the garden tool comprises a mower, snowplow or hedge trimmer.

The charger of this application sets up control switch through between auxiliary power interface and the first auxiliary power output of rifle that charges to make the auxiliary power supply of charger output controllable, can break off under the rifle state and carry auxiliary power to garden instrument's BMS, BMS does not work, thereby reduces the energy consumption when inserting the rifle state.

Drawings

Fig. 1 is a schematic structural diagram of a charging system provided in the present application.

Fig. 2 is a schematic diagram of a charger provided in the present application.

Fig. 3 is a schematic diagram of a charging control board provided in the present application.

Description of the reference numerals:

10. a charger; 11. a charging control board; 111. an auxiliary power input end; 112. the second auxiliary power output end; 113. a control switch; 114. a relay power supply end; 115. a control unit; 116. a buck module; 12. an input interface; 121. a DC power interface; 122. a first CAN communication interface; 123. an auxiliary power interface; 13. a power output module; 14. an output relay; 15. a charging gun; 151. a DC output terminal; 152. a first auxiliary power output; 153. a second CAN communication interface; 20. a gardening tool.

Detailed Description

Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

Referring to fig. 1, a charging system is provided. The charging system is applied to an energy storage system, and comprises a charger 10 and a garden tool 20, wherein the charger 10 can take electricity from a direct current bus of the energy storage system and charge the garden tool 20, and the garden tool 20 can be a mower or other garden tools which are provided with a gun inserting interface and need to be charged through the energy storage system.

Fig. 2 shows a schematic diagram of the charger 10. The charger 10 includes an input interface 12, a charge control board 11, a charge gun 15, a power output module 13, and a control switch 113.

In one embodiment, the input interface 12 includes a dc power interface 121 and an auxiliary power interface 123, the dc power interface 121 being connected to an external dc bus and the auxiliary power interface 123 being connected to an external auxiliary power bus.

In one embodiment, the charging gun 15 is connected to the garden tool 20, and the charging gun 15 comprises a first auxiliary power output 152 and a dc output 151, the first auxiliary power output 152 being connected to the auxiliary power interface 123.

In one embodiment, the power output module 13 is communicatively connected to the charge control board 11, the input terminal of the power output module 13 is connected to the dc power interface 121, and the output terminal of the power output module 13 is connected to the dc output terminal 151.

In one embodiment, the control switch 113 is disposed between the first auxiliary power output 152 and the auxiliary power interface 123; the control switch 113 is used for switching the working state according to the control signal of the charging control board 11, so that the first auxiliary power output 152 does not output the 12V auxiliary power source before confirming that the charging gun 15 and the charging socket of the gardening tool 20 are in normal plugging state.

Specifically, before the normal plugging state of the charging gun 15 and the charging socket of the garden tool 20 is confirmed by the detection signal, the control switch 113 may be turned off, the first auxiliary power output 152 is disconnected from the auxiliary power interface 123, the first auxiliary power output 152 does not output the auxiliary power to the outside, and the battery management system (Battery Management System, BMS) of the garden tool 20 is in an inactive state; after confirming that the plugging state of the charging gun 15 and the charging socket of the garden tool 20 is normal through the detection signal, the controllable control switch 113 is turned on, the first auxiliary power output 152 is communicated with the auxiliary power interface 123, and the first auxiliary power output 152 can output auxiliary power outwards to supply power to the battery management system of the garden tool 20 so as to activate the battery management system to charge the power battery of the garden tool 20. By setting the control switch 113 between the auxiliary power interface 123 and the first auxiliary power output terminal 152 of the charging gun 15, the auxiliary power output by the charger 10 is controllable, and the auxiliary power can be disconnected from the BMS of the garden tool 20 in the gun inserting state, and the BMS does not work, so that the energy consumption in the gun inserting state is reduced.

Referring to fig. 2, in an embodiment, the input interface 12 may be an input connector, and the input interface 12 includes a dc power interface 121, an auxiliary power interface 123, and a first CAN communication interface 122 as interfaces for connecting with a dc bus, an auxiliary power bus, and a CAN bus of the energy storage system. The direct current power interface 121 is connected with a direct current bus of the energy storage system, and the charger 10 can take electricity from the direct current bus through the direct current power interface 121 to charge the gardening tool 20; the auxiliary power interface 123 is connected with an auxiliary power bus of the energy storage system, the charger 10 CAN take electricity from the auxiliary power bus via the auxiliary power interface 123 to provide auxiliary power for the gardening tool 20 system, the first CAN communication interface 122 is connected with a CAN bus of the energy storage system, and the charger 10 CAN communicate and interact with a PCS module (serving as a central control module) of the energy storage system through the first CAN communication interface 122.

As shown in fig. 2 and 3, in an embodiment, to increase reliability, the control switch 113 may be integrated on the charge control board 11, and the control switch 113 may be a power switch tube such as a MOS tube, an IGBT, or the like.

As shown in fig. 2 and 3, in one embodiment, the charge control board 11 is provided with an auxiliary power input terminal 111 and a second auxiliary power output terminal 112; the auxiliary power input end 111 is connected with the auxiliary power interface 123, the second auxiliary power output end 112 is connected with the auxiliary power input end 111 through the control switch 113, and the second auxiliary power output end 112 is connected with the first auxiliary power output end 152, so that the purpose of controlling the output of the auxiliary power can be achieved by controlling the communication state of a circuit between the second auxiliary power output end 112 and the auxiliary power input end 111 through the control switch 113. Of course, the control switch 113 may be disposed between the second auxiliary power output 112 and the first auxiliary power output 152, and the purpose of controlling the output of the auxiliary power source may be achieved.

As shown in fig. 2 and 3, in an embodiment, the charging control board 11 further includes a control unit 115, where the control unit 115 is connected to the power output module 13 and the control switch 113, and the control unit 115 is used to control the on-off state of the control switch 113, so as to implement controllable output of the auxiliary power supply; the control unit 115 is further configured to control an operation state of the power output module 13, so as to implement charging power output.

As shown in fig. 2, in an embodiment, the charger 10 is further provided with an output relay 14, the output relay 14 is disposed between the output end of the power output module 13 and the dc output end 151 of the charging gun 15, and the charging control board 11 is used for controlling the working state of the output relay 14 to switch, that is, the charging control board 11 can control the on/off of the output relay 14, so as to control the on/off of an output line between the output end of the power output module 13 and the dc output end 151 of the charging gun 15. The output relay 14 includes an output relay at the positive end and an output relay at the negative end, the output relay at the positive end is connected between the positive output end of the power output module 13 and the positive dc output end of the charging gun 15, and the output relay at the negative end is connected between the negative output end of the power output module 13 and the negative dc output end of the charging gun 15.

As shown IN fig. 2, IN an embodiment, since the auxiliary power obtained through the auxiliary power interface 123 is limited and is not suitable for driving the output relay 14 to operate, the charger 10 of the present embodiment may control the switching of the operating state of the output relay 14 by controlling the output of the voltage reducing module 116 by providing the DC input DC-IN, the voltage reducing module 116 and the relay power supply 114 on the charge control board 11, connecting the input of the voltage reducing module 116 to the DC power interface 121 through the DC input DC-IN, and connecting the output of the voltage reducing module 116 to the coil of the output relay 14 through the relay power supply 114.

Specifically, when the output relay 14 is required to be attracted, the buck module 116 is utilized to convert the high-voltage direct current acquired from the direct current power interface 121 into 12V low-voltage direct current (can be of other specification voltage values) suitable for driving the coil of the output relay 14 to attract, so as to control the output relay 14 to attract, and thus, an output end of the power output module 13 is communicated with an output line between the direct current output end 151 of the charging gun 15; when the output relay 14 is required to be disconnected, the step-down module 116 is stopped, and the coil of the output relay 14 is in a disconnected state due to power failure, so that an output line between the output end of the power output module 13 and the direct current output end 151 of the charging gun 15 is disconnected.

As shown in fig. 2, in an embodiment, the power output module 13 includes a plurality of DC/DC modules disposed in parallel between the input interface 12 and the DC output 151, so that some or all of the plurality of DC/DC modules may be selected to charge the garden tool 20 as needed. Fig. 2 shows a case where the power output module 13 includes three DC/DC module power output modules 13, that is, DC/DC modules 13a, 13b, and 13c, respectively, in actual use, the number of DC/DC modules in the power output module 13 may be set according to the maximum output power of the charger 10 and the power of the DC/DC modules, and on the premise of meeting the maximum output power of the charger 10, a mode in which a plurality of low-power DC/DC modules are connected in parallel may be selected, or a mode in which a single high-power DC/DC module may be adopted.

As shown in fig. 2, in an embodiment, the output end of the power output module 13 is connected to the dc output end 151 through a cable, so as to maximize the performance of the power output module 13 and improve the maximum outputtable power of the power output module 13, the cable needs to be selected to meet the use requirements of normal current and maximum current. Taking the example that the power output module 13 includes three DC/DC modules of 2KW, in order to maximize the output power of the entire power output module 13, the diameter of the cable needs to be 5mm or more, and the cable may be, for example, 1AWG cable, 2AWG cable, 3AWG cable, 4AWG cable, 1/0AWG cable, 2/0AWG cable, 3/0AWG cable, 4/0AWG cable, or the like.

As shown in fig. 2 and 3, in one embodiment, the charge control board 11 is connected to the power output module 13 through an RS485 bus. Specifically, the control unit 115 of the charging control board 11 and each DC/DC module of the power output module 13 are respectively provided with a 485 communication interface, the 485 communication port of the control unit 115 is in communication connection with the 485 communication port of each DC/DC module, and the control unit 115 can control the plurality of DC/DC modules to work according to the charging power requirement so as to charge the gardening tool 20.

Referring to fig. 2 and 3, in one embodiment, to enable the charger 10 to communicate with the PCS module of the energy storage system and the battery management system of the garden tool 20, the control unit 115 of the charging control board 11 communicates with the external CAN bus via the first CAN communication interface 122 on the input interface 12, and the charging control board 11 communicates with the garden tool 20 via the second CAN communication interface 153 on the charging gun 15. Of course, in other embodiments, wireless communication modes such as WIFI, bluetooth and the like may also be used for communication.

In an embodiment, a manual pause button is provided on the charger 10, and the manual pause button is connected to the control unit 115 of the charger 10, and in the charging process, when the pause button is pressed, the output of the power output module 13 is immediately turned off, and after a first preset time, the output relay 14 is turned off, at this time, the control switch 113 is not turned off, and after the manual pause button is restored, and the charging requirement is met, the charging can be continued. The first preset time may be set to 0.2-0.7 seconds, preferably 0.5 seconds, but may be set to more than 0.7 seconds or less than 0.2 seconds.

In an embodiment, a mechanical lock is provided on the charging gun 15 of the charger 10, said mechanical lock being connected to the control unit 115 of the charger 10. When the mechanical lock button is pressed, the charger 10 immediately turns off the power output module 13, turns off the output relay 14 after a second preset time, avoids the charging gun 15 from being pulled out, and restarts charging after a third preset time after the mechanical lock button is released. Wherein the second preset time may be configured to be between 0 and 0.3 seconds, preferably 0.1 seconds, and the third preset time may be configured to be between 5 and 10 seconds, preferably 8 seconds.

In an embodiment, during the charging process, the control unit 115 of the charger 10 does not receive the battery management system message within the fourth preset time, which is defined as a communication interrupt, immediately cuts off the output of the power output module 13, and sends the fault information of the communication interrupt to the PCS module of the energy storage system according to the protocol. The fourth preset time may be set to 2-7 seconds, preferably 5 seconds, and may be set to more than 2 seconds or less than 7 seconds.

The charging process of the charger 10 of the present embodiment for the garden tool 20 is as follows:

after the charger 10 is ready, the charging gun 15 can be inserted into the charging socket of the garden tool 20, the plugging state of the charging gun 15 and the charging socket of the garden tool 20 is confirmed through the detection signal, and after the plugging state of the charging gun 15 and the charging socket of the garden tool 20 is confirmed to be normal, the controllable switch is closed so as to activate the battery management system of the garden tool 20 and send a message of the charger 10 to the battery management system;

after the charger 10 receives a charging instruction of the battery management system, an output relay 14 of the charger 10 is closed, and when the charging instruction is in a charging mode, the battery voltage is detected and the voltage is output; when the instruction is in a heating mode, outputting voltage according to the request;

after the output relay 14 is attracted, the charger 10 receives the highest allowable current sent by the battery management system, and the charger 10 is in steady-current charging;

as the capacity of the power battery is gradually full, the battery management system performs constant voltage/constant current charging in a stage, and at the moment, the charger 10 controls voltage/constant current output to stably change along with the requirement of the battery management system;

after the battery capacity is full, the power output module 13 is immediately turned off after receiving a shutdown instruction of the battery management system, the output relay 14 is turned off after a fifth preset time is seconds, and the controlled switch is not turned off. The fifth preset time may be set to 0.2-0.7 seconds, preferably 0.5 seconds, but may be set to more than 0.7 seconds or less than 0.2 seconds.

To sum up, the charger and the charging system provided in this embodiment set up control switch between auxiliary power interface and the auxiliary power output of rifle that charges to make the auxiliary power of charger output controllable, can break off under the rifle state and carry auxiliary power to garden instrument's BMS, BMS does not work, thereby reduces the energy consumption when inserting the rifle state.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present application.

Claims (13)

1. A charger, comprising:

the input interface comprises an auxiliary power interface, and the auxiliary power interface is connected with an external auxiliary power bus;

a charging control board;

the charging gun is connected with the gardening tool and comprises a first auxiliary power output end which is connected with the auxiliary power interface;

and

The control switch is arranged between the first auxiliary power output end and the auxiliary power interface;

the control switch is used for switching the working state according to the control signal of the charging control board so that the first auxiliary power output end does not output auxiliary power outwards before the fact that the plug-in state of the charging gun and the charging socket of the gardening tool is normal is confirmed.

2. The charger of claim 1 wherein the charge control board comprises an auxiliary power input and a second auxiliary power output, the auxiliary power input being connected to the auxiliary power interface, the second auxiliary power output being connected to the auxiliary power input through the control switch, the second auxiliary power output being connected to the first auxiliary power output.

3. The charger of claim 2 wherein said control switch is integrated on said charge control board.

4. The charger of claim 1 further comprising a power output module in communication with said charge control board, an input of said power output module being connected to an external dc bus, an output of said power output module being connected to said charge gun.

5. The charger of claim 4 wherein the charge control board further comprises a control unit, the control unit is connected to the power output module and the control switch, respectively, the control unit is configured to control a switching state of the control switch, and the control unit is further configured to control an operating state of the power output module.

6. The charger of claim 5 further comprising an output relay disposed between an output of said power output module and said charging gun, said charging control board for controlling switching of an operating state of said output relay.

7. The charger of claim 6 wherein the charge control board further comprises a dc input, a step-down module and a relay power supply, the input of the step-down module being connected to an external dc bus through the dc input, the output of the step-down module being connected to the coil of the output relay through the relay power supply, the switching of the operating state of the output relay being controlled by controlling the output of the step-down module.

8. The charger of claim 4 wherein the output of the power output module is connected to the dc output of the charging gun by a cable having a diameter of 5mm or more.

9. The charger of claim 4 wherein the charge control board is connected to the power output module by a 485 bus.

10. The charger of any one of claims 4-9 wherein the power output module comprises a plurality of DC/DC modules disposed in parallel between the input interface and a direct current output of the charging gun.

11. The charger of claim 1 wherein the charging control board communicates with an external CAN bus, the charging control board communicating with a garden tool through a second CAN communication interface on the charging gun.

12. The charger of claim 1 wherein the control switch comprises a MOS transistor.

13. A charging system, comprising:

a gardening tool provided with a gun inserting interface; and

a charger, comprising:

the input interface comprises a direct current power interface and an auxiliary power interface, wherein the direct current power interface is connected with an external direct current bus, and the auxiliary power interface is connected with an external auxiliary power bus;

a charging control board;

the charging gun is matched with the charging socket of the gardening tool and comprises a first auxiliary power output end and a direct current output end, the first auxiliary power output end is connected with the auxiliary power interface, and the first auxiliary power output end is connected with the battery management system of the gardening tool;

the power output module is in communication connection with the charging control board, the input end of the power output module is connected with the direct current power supply interface, and the output end of the power output module is connected with the direct current output end; and

the control switch is arranged between the first auxiliary power output end and the auxiliary power interface;

the control switch is used for switching the working state according to the control signal of the charging control board so that the first auxiliary power output end does not output auxiliary power outwards before the fact that the plug-in state of the charging gun and the charging socket of the gardening tool is normal is confirmed.