CN212726492U - Battery device, charge-discharge protection circuit and movable platform - Google Patents
Battery device, charge-discharge protection circuit and movable platform Download PDFInfo
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- CN212726492U CN212726492U CN202020648369.4U CN202020648369U CN212726492U CN 212726492 U CN212726492 U CN 212726492U CN 202020648369 U CN202020648369 U CN 202020648369U CN 212726492 U CN212726492 U CN 212726492U
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- 238000007599 discharging Methods 0.000 claims description 47
- 230000000903 blocking effect Effects 0.000 claims description 10
- 230000005669 field effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 238000013021 overheating Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The embodiment of the utility model provides a battery device, charge-discharge protection circuit and movable platform, wherein, battery device includes a plurality of batteries of electricity connection, these a plurality of battery parallel connection, these a plurality of batteries are used for the power supply to movable platform, every battery in these a plurality of batteries includes electric core and charge-discharge protection circuit, wherein, charge-discharge protection circuit connects between electric core and movable platform, this charge-discharge protection circuit includes ideal diode control circuit, this ideal diode control circuit, be used for when battery device hot plug battery, block the mutual charging between these a plurality of batteries of parallel connection, thereby can utilize ideal diode control circuit to solve the problem of charging each other between battery device's a plurality of batteries effectively, still improved electric energy utilization when guaranteeing battery safety.
Description
Technical Field
The utility model relates to the field of electronic technology, concretely relates to battery device, charge-discharge protection circuit and movable platform.
Background
With the development of science and technology and the progress of society, the use of movable platforms such as unmanned aerial vehicles (such as multi-rotor unmanned aerial vehicles), automobiles (such as electric automobiles), cloud trolleys and the like is more and more popular, and the scheme of multi-battery parallel power supply is generally adopted in consideration of the fact that the movable platforms are generally driven by a plurality of motors and consume higher electric energy and the requirement on the endurance mileage. However, in practical applications, it is found that the multiple batteries are supplied in parallel, and there are technical problems that voltages of different batteries are likely to be different, when the batteries are replaced by heat, the battery with high voltage will charge the battery with low voltage due to the parallel connection of multiple batteries, the charging current may be very large due to the low impedance and the large voltage difference, and if the maximum charging current allowed by the batteries is exceeded, the battery cell is easily over-charged to generate lithium deposition, and further accidents such as combustion and fire may be caused.
In order to solve the problem of mutual charging of the batteries, a schottky diode is generally used in a multi-battery power supply system to block mutual charging between the batteries, and the schottky diode is connected between the batteries and a movable platform, but because the movable platform works at a high power and a high current, the schottky diode generally has a voltage drop of 0.7V, so that the generated power is high, the movable platform is easy to overheat and burn out, and the electric energy utilization efficiency is reduced due to the loss of the power consumption.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a battery device, charge-discharge protection circuit and movable platform can utilize ideal diode control circuit to solve the problem of charging each other between battery device's a plurality of batteries effectively, has still improved electric energy utilization when guaranteeing battery safety.
A battery device, comprising: a plurality of batteries of electricity connection, a plurality of batteries parallel connection, a plurality of batteries are used for to the portable platform power supply, every battery in a plurality of batteries includes electric core and charge-discharge protection circuit, wherein:
the charging and discharging protection circuit is connected between the battery cell and the movable platform.
The charging and discharging protection circuit comprises an ideal diode control circuit.
The ideal diode control circuit is used for blocking the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
Optionally, the ideal diode control circuit includes a first switch circuit and an ideal diode driver, the ideal diode driver is connected to the first switch circuit, wherein:
the ideal diode driver is used for driving the first switch circuit to block the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
Optionally, the ideal diode driver is specifically configured to drive the first switch circuit to be turned on when the battery device is used for hot plugging a battery, so as to block a charging current of a first battery to a second battery in the plurality of batteries connected in parallel, where a voltage of the first battery is greater than a voltage of the second battery.
Optionally, the ideal diode driver is configured to control the first switch circuit to be turned on and off.
Optionally, under the condition that the battery device is hot plugged with a battery, wherein:
the ideal diode driver is used for controlling the first switch circuit to be switched on so as to block the mutual charging among the plurality of batteries connected in parallel.
Optionally, in a case that a battery of the battery device is in a discharge state and the movable platform does not move, wherein:
and the ideal diode driver is used for controlling the first switch circuit to be started.
Optionally, in a case that a battery of the battery device is in a discharging state and the movable platform moves, wherein:
the ideal diode driver is used for controlling the first switch circuit to be closed.
Optionally, the charge and discharge protection circuit further includes a second switch circuit for charging and a third switch circuit for discharging, the second switch circuit is connected in series with the third switch circuit, and the ideal diode control circuit is connected in parallel with the second switch circuit.
Optionally, the charge and discharge protection circuit further includes a first driver and a second driver, the first driver is connected to the second switch circuit, and the second driver is connected to the third switch circuit, where:
the first driver is used for controlling the second switch circuit to be switched on and off.
And the second driver is used for controlling the third switch circuit to be switched on and off.
Optionally, under the condition that the battery device is hot plugged with a battery, wherein:
the first driver is used for controlling the second switch circuit to be started.
And the second driver is used for controlling the third switch circuit to be started.
Optionally, in a case that a battery of the battery device is in a discharge state and the movable platform does not move, wherein:
the first driver is used for controlling the second switch circuit to be closed.
And the second driver is used for controlling the third switch circuit to be started.
Optionally, in a case that a battery of the battery device is in a discharging state and the movable platform moves, wherein:
the first driver is used for controlling the second switch circuit to be started.
And the second driver is used for controlling the third switch circuit to be started.
Optionally, the first switching circuit includes a first field effect transistor.
Optionally, the second switching circuit includes a second fet, and/or the third switching circuit includes a third fet.
Optionally, the movable platform includes one or more of an unmanned aerial vehicle, a handheld cloud deck, an automobile and a cloud platform vehicle.
A charge-discharge protection circuit applied to each of a plurality of batteries electrically connected to a battery device, the plurality of batteries connected in parallel, the plurality of batteries for powering a movable platform, each battery further comprising a cell, wherein:
the charging and discharging protection circuit is connected between the battery cell and the movable platform.
The charging and discharging protection circuit comprises an ideal diode control circuit.
The ideal diode control circuit is used for blocking the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
Optionally, the ideal diode control circuit includes a first switch circuit and an ideal diode driver, the ideal diode driver is connected to the first switch circuit, wherein:
the ideal diode driver is used for driving the first switch circuit to block the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
Optionally, the ideal diode driver is specifically configured to drive the first switch circuit to be turned on when the battery device is used for hot plugging a battery, so as to block a charging current of a first battery to a second battery in the plurality of batteries connected in parallel, where a voltage of the first battery is greater than a voltage of the second battery.
Optionally, the ideal diode driver is configured to control the first switch circuit to be turned on and off.
Optionally, under the condition that the battery device is hot plugged with a battery, wherein:
the ideal diode driver is used for controlling the first switch circuit to be switched on so as to block the mutual charging among the plurality of batteries connected in parallel.
Optionally, in a case that a battery of the battery device is in a discharge state and the movable platform does not move, wherein:
and the ideal diode driver is used for controlling the first switch circuit to be started.
Optionally, in a case that a battery of the battery device is in a discharging state and the movable platform moves, wherein:
the ideal diode driver is used for controlling the first switch circuit to be closed.
Optionally, the charge and discharge protection circuit further includes a second switch circuit for charging and a third switch circuit for discharging, the second switch circuit is connected in series with the third switch circuit, and the ideal diode control circuit is connected in parallel with the second switch circuit.
Optionally, the charge and discharge protection circuit further includes a first driver and a second driver, the first driver is connected to the second switch circuit, and the second driver is connected to the third switch circuit, where:
the first driver is used for controlling the second switch circuit to be switched on and off.
And the second driver is used for controlling the third switch circuit to be switched on and off.
Optionally, under the condition that the battery device is hot plugged with a battery, wherein:
the first driver is used for controlling the second switch circuit to be started.
And the second driver is used for controlling the third switch circuit to be started.
Optionally, in a case that a battery of the battery device is in a discharge state and the movable platform does not move, wherein:
the first driver is used for controlling the second switch circuit to be closed.
And the second driver is used for controlling the third switch circuit to be started.
Optionally, in a case that a battery of the battery device is in a discharging state and the movable platform moves, wherein:
the first driver is used for controlling the second switch circuit to be started.
And the second driver is used for controlling the third switch circuit to be started.
Optionally, the first switching circuit includes a first field effect transistor.
Optionally, the second switching circuit includes a second fet, and/or the third switching circuit includes a third fet.
A movable platform, comprising:
a body, and
the battery device is arranged on the machine body;
wherein, the battery device is used for providing power for the machine body.
The utility model provides a battery device is including a plurality of batteries of electricity connection, these a plurality of battery parallel connection, these a plurality of batteries are used for supplying power to portable platform, every battery in these a plurality of batteries includes electric core and charge-discharge protection circuit, wherein, charge-discharge protection circuit connects between electric core and portable platform, charge-discharge protection circuit includes ideal diode control circuit, this ideal diode control circuit has the forward and switches on, reverse end, and the forward does not have the pressure drop almost, no power loss's characteristic, thereby when utilizing this ideal diode control circuit can solve battery device hot plug battery effectively, the problem of charging each other between the battery, still improved electric energy utilization when guaranteeing battery safety.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a battery device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an ideal diode control circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of another ideal diode control circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram of a charging and discharging protection circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit structure diagram of another charge and discharge protection circuit according to an embodiment of the present invention;
fig. 6 is a schematic circuit structure diagram of another charge/discharge protection circuit according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of another battery device according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of another charge/discharge protection circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The use of movable platforms such as unmanned aerial vehicles (like many rotor unmanned aerial vehicles), cars (like electric automobile), cloud platform truck is becoming more and more popular, considers that this type of movable platform needs a plurality of motor drives usually, and the electric energy of consumption is higher, in addition to the requirement to the continuation of the journey mileage, can adopt the scheme of the parallelly connected power supply of many batteries usually. However, in practical applications, it is found that the multiple batteries are supplied in parallel, and there are technical problems that voltages of different batteries are likely to be different, when the batteries are replaced by heat, the battery with high voltage will charge the battery with low voltage due to the parallel connection of multiple batteries, the charging current may be very large due to the low impedance and the large voltage difference, and if the maximum charging current allowed by the batteries is exceeded, the battery cell is easily over-charged to generate lithium deposition, and further accidents such as combustion and fire may be caused.
For the disadvantage that the schottky diode is easily burned out due to overheating and the electric energy utilization efficiency is reduced due to the scheme of blocking mutual charging between batteries by adopting the schottky diode, a back-to-back structure formed by a charging Metal-Oxide Semiconductor (MOS) tube and a discharging MOS tube can be adopted to replace the schottky diode at present, when the batteries are replaced by heat, only the discharging MOS tube is opened, the power supply current at the moment passes through the body diode of the charging MOS tube and the discharging MOS, but the body diode of the MOS tube is easily damaged by heat when larger current is conducted for a long time. Therefore, in a use scene requiring large-current power supply, the back-to-back structure formed by the charging MOS tube and the discharging MOS tube also has the problems of easily causing overheating damage of electronic devices, reducing the utilization efficiency of electric energy and the like.
In the use scene to needs the heavy current power supply, lead to the overheated damage of electron device easily when hot replacement battery to and the problem that the electric energy utilization efficiency reduces, the utility model provides a battery device to every battery of battery device, adopts the ideal diode to replace the body diode of the MOS pipe that charges in the above-mentioned scheme, specifically can be with the MOS pipe parallel connection that charges in ideal diode and the back-to-back structure, the ideal diode is connected between the electric core and the movable platform (for example unmanned aerial vehicle) of every battery as charge-discharge protection circuit. Before the unmanned aerial vehicle takes off, the ideal diode is opened when the battery is replaced by heat, and the ideal diode is closed after the unmanned aerial vehicle takes off, so that the characteristics of forward conduction, reverse cut-off and almost no voltage drop and no power loss of the ideal diode are utilized, the batteries can be effectively blocked from being charged mutually through the ideal diode when the battery is replaced by heat, the overheating damage of electronic devices can be avoided, and the electric energy utilization efficiency is improved.
Introduce below combining a concrete application scene the utility model discloses to many rotor unmanned aerial vehicle's power supply is the example. The power supply interface that many rotor unmanned aerial vehicle can be inserted through pluggable mode to the battery device, many rotor unmanned aerial vehicle detect the electric quantity of each battery in the battery device in flight process, when there is the not enough battery of electric quantity, many rotor unmanned aerial vehicle can descend automatically in appointed place, perhaps, also can be when there being the not enough battery of electric quantity, many rotor unmanned aerial vehicle inform ground satellite station (for example remote controller), descend in appointed place through the many rotor unmanned aerial vehicle of ground satellite station control by the user. Many rotor unmanned aerial vehicle fall to the ground after, each battery of battery device can open the ideal diode of connection between electric core and many rotor unmanned aerial vehicle, the user can change the battery through the mode of hot plug, for example, extract the A battery, insert the C battery, extract the B battery again, insert the D battery, the in-process of changing the battery at the hot plug, the ideal diode is in the open mode, utilize ideal diode forward to switch on, reverse characteristic that ends can effectively block charging each other between the battery, and, the ideal diode has forward almost no pressure drop yet, no power loss's characteristic, can avoid the overheated damage of ideal diode when hot replacement battery, the electric energy utilization efficiency has still been improved, after the battery change finishes, ideal diode is closed to each battery, many rotor unmanned aerial vehicle can take off and continue work. It is thus clear that in the use scene that needs the heavy current power supply, the utility model discloses can effectively guarantee the safe hot plug of battery to electric energy utilization efficiency has been improved.
Fig. 1 is a schematic circuit diagram of a battery device according to an embodiment of the present invention. The battery device 10 includes: a plurality of batteries 20 electrically connected, the plurality of batteries 20 being connected in parallel, the plurality of batteries 20 being used to power the movable platform 60, each battery 20 of the plurality of batteries 20 comprising a battery cell 30 and a charge-discharge protection circuit 40, wherein:
the charge and discharge protection circuit 40 is connected between the battery cell 30 and the movable platform 60.
The charge/discharge protection circuit 40 includes an ideal diode control circuit 50.
The ideal diode control circuit 50 is used for blocking the mutual charging among the plurality of batteries 20 connected in parallel when the battery device 10 is hot-plugged.
Specifically, the battery in the battery device 10 may be replaced by hot plugging, for example, when the battery a and the battery B supply power to the movable platform 60, the battery a may be pulled out, the battery C may be inserted, the battery B may be pulled out, the battery D may be inserted, and the hot plugging replacement of the power supply battery may be implemented without affecting the power supply of the movable platform 60. When the hot plug battery, because the voltage between the battery 20 of difference is probably different, consequently there is the risk of charging each other between the battery, in addition impedance between the battery 20 is less, can produce too big charging current very likely, there is very big potential safety hazard, the utility model discloses at the inside charge-discharge protection circuit 40 that sets up of every battery 20 of battery device 10, ideal diode control circuit 50 in the charge-discharge protection circuit 40 not only possesses forward and switches on, reverse characteristics that ends, still possesses forward nearly no pressure drop and no power loss's characteristic, when can block battery device 10 hot plug battery effectively through ideal diode control circuit 50, mutual charging between the battery 20 has still improved electric energy utilization when guaranteeing battery safety.
It is therefore clear that the embodiment of the utility model provides a battery device is through utilizing ideal diode control circuit forward to switch on, reverse to and forward almost no pressure drop, no power loss's characteristic, when can solving battery device hot plug battery effectively, the problem of charging each other between the battery has still improved electric energy utilization when guaranteeing battery safety.
Optionally, as shown in fig. 2, the ideal diode control circuit 50 includes a first switch circuit 501 and an ideal diode driver 502, the ideal diode driver 502 is connected to the first switch circuit 501, wherein:
the ideal diode driver 502 is used for blocking the mutual charging between the plurality of batteries 20 connected in parallel by driving the first switch circuit 501 when the battery device 10 is hot-plugged.
The ideal diode control circuit 50 may be specifically an ideal diode, and the ideal diode is composed of a switch circuit (denoted as a first switch circuit 501) and an ideal diode driver 502, and when the battery device 10 is hot-plugged with a battery, the ideal diode driver 502 may drive the first switch circuit 501 to block mutual charging between the plurality of batteries 20 connected in parallel.
Optionally, the first switching circuit 501 includes a first fet 501. As shown in fig. 3, which is a schematic circuit structure diagram of another ideal diode control circuit provided in an embodiment of the present invention, wherein the first fet 501 may specifically be a Metal-Oxide Semiconductor (MOS) transistor, and the MOS transistor is driven by an ideal diode driver 502.
It should be noted that, the embodiment of the present invention is not limited to a specific type of MOS transistor, and the MOS transistor may be a P-channel MOS transistor (i.e., PMOS) or an N-channel MOS transistor (i.e., NMOS).
Optionally, the ideal diode driver 502 is specifically configured to, when the battery device 10 is hot plugged, drive the first switch circuit 501 to turn on to block a charging current from a first battery to a second battery in the multiple batteries 20 connected in parallel, where a voltage of the first battery is greater than a voltage of the second battery, that is, a battery with a higher voltage may be blocked from being charged to a battery with a lower voltage when the battery is hot plugged.
Optionally, an ideal diode driver 502 is used to control the on and off of the first switch circuit 501.
Specifically, the ideal diode driver 502 drives the first switch circuit 501 means that the ideal diode driver 502 can control the first switch circuit 501 to be turned on and off.
Alternatively, a specific implementation manner that the ideal diode driver 502 blocks mutual charging between the plurality of batteries 20 connected in parallel by driving the first switch circuit 501 may include:
in the case of hot plugging the battery in the battery device 10, the ideal diode driver 502 is used to control the first switch circuit 501 to be turned on to block the mutual charging between the plurality of batteries 20 connected in parallel, thereby ensuring the safety of the batteries when the batteries are hot plugged.
Alternatively, in the case that the battery of the battery device 10 is in a discharging state and the movable platform 60 does not move, the ideal diode driver 502 is used to control the first switch circuit 501 to be turned on.
Alternatively, in the case where the battery of the battery device 10 is in a discharge state and the movable platform 60 is moved, the ideal diode driver 502 is used to control the first switch circuit 501 to be turned off.
Specifically, because the battery is in a discharge state, and under the condition that the movable platform 60 moves, for example, the unmanned aerial vehicle takes off, the car and the car with the cradle head start to run, the working current of the movable platform 60 is large, that is, the discharge current of the battery 20 is large at this time, the ideal diode driver 502 needs to control the first switch circuit 501 to be turned off, so as to prevent the ideal diode control circuit 50 (i.e., the ideal diode) from being burnt out, so as to protect the safety of the ideal diode, so that the ideal diode control circuit 50 can still normally work when the battery is required to be hot-plugged again, and thus the function of blocking mutual charging between the batteries 20 is achieved.
Alternatively, as shown in fig. 4, the charge and discharge protection circuit 40 may further include a second switching circuit 70 for charging and a third switching circuit 80 for discharging, the second switching circuit 70 being connected in series with the third switching circuit 80, and the ideal diode control circuit 50 being connected in parallel with the second switching circuit 70, in addition to the ideal diode control circuit 50.
Specifically, the second switch circuit 70 is used for charge control of the battery 20, and the third switch circuit 80 is used for discharge control of the battery 20.
Optionally, the second switching circuit 70 includes a second fet, and/or the third switching circuit 80 includes a third fet.
Optionally, as shown in fig. 5, the charge and discharge protection circuit 40 may further include a first driver 71 and a second driver 81, the first driver 71 is connected to the second switch circuit 70, and the second driver 81 is connected to the third switch circuit 80.
Specifically, the second switch circuit 70 and the third switch circuit 80 may be driven by corresponding drivers. Wherein the first driver 71 drives the second switching circuit 70 by controlling the second switching circuit 70 to be turned on and off, and the second driver 81 drives the third switching circuit 80 by controlling the third switching circuit 80 to be turned on and off.
Optionally, the driver may drive the switch circuit according to the state of the battery 20 and/or the movable platform 60, and in the case that the battery device 10 is hot plugged, the first driver 71 is used to control the second switch circuit 70 to be turned on, and the second driver 81 is used to control the third switch circuit 80 to be turned on, that is, both the second switch circuit 70 and the third switch circuit 80 are turned on at this time.
Alternatively, in the case that the battery of the battery device 10 is in a discharging state and the movable platform 60 does not move, the first driver 71 is used for controlling the second switch circuit 70 to be turned off, and the second driver 81 is used for controlling the third switch circuit 80 to be turned on.
Specifically, in the case where the movable platform 60 is not moved, although the battery of the battery device 10 is in a discharging state, the discharging current of the battery 20 is small, and the second switch circuit 70 for charge control may be turned off, so that the discharging current is allowed to flow through the body diode of the second fet included in the second switch circuit 70, and the body diode of the second fet is not damaged.
Alternatively, in the case that the battery of the battery device 10 is in a discharging state and the movable platform 60 moves, the first driver 71 is used for controlling the second switch circuit 70 to be turned on, and the second driver 81 is used for controlling the third switch circuit 80 to be turned on.
Specifically, since the movable platform 60 moves, and the discharge current of the battery 20 is large, the second switch circuit 70 for charge control needs to be turned on to avoid that the body diode of the second fet is damaged due to the excessive discharge current flowing through the body diode of the second fet included in the second switch circuit 70.
Optionally, the state of the battery 20 (including hot plugging the battery, discharging), and the state of the movable platform 60 (including no movement, movement), may be notified to each driver by the battery and the movable platform, so that each driver may drive the corresponding switch circuit according to the state of the battery 20 and/or the movable platform 60, including controlling the switch circuit to be turned on or off.
Alternatively, as shown in fig. 6, the second fet 70 and the third fet 80 may be specifically back-to-back structures formed by two MOS transistors.
Optionally, the movable platform 60 may include one or more of an unmanned aerial vehicle, an automobile, and a cloud platform vehicle, for example, a multi-rotor unmanned aerial vehicle, an automobile, a cloud platform vehicle, a handheld cloud platform, etc., the embodiment of the present invention is not limited.
Optionally, as shown in fig. 7, the circuit structure of another battery device provided in the embodiment of the present invention is schematically illustrated.
Specifically, the battery device 10 includes a battery, a charging MOS transistor, a discharging MOS transistor, and an ideal diode, and the ideal diode is connected in parallel with the charging MOS transistor.
When the battery device is hot-plugged, the battery device can effectively block mutual charging between batteries by using the characteristics of forward conduction, reverse cut-off, almost no voltage drop in the forward direction and no power loss of the ideal diode, thereby ensuring the safety of the batteries and simultaneously improving the electric energy utilization rate.
Fig. 8 is a schematic circuit diagram of another charge/discharge protection circuit according to an embodiment of the present invention. The charge and discharge protection circuit 40 may be applied to each battery 20 in a plurality of electrically connected batteries 20 included in the battery device 10, the plurality of batteries 20 being connected in parallel, the plurality of batteries 20 being used for supplying power to the movable platform 60, each battery 20 further including a battery core 30, wherein:
the charge and discharge protection circuit 40 is connected between the battery cell 30 and the movable platform 60.
The charge/discharge protection circuit 40 includes an ideal diode control circuit 50.
The ideal diode control circuit 50 is used for blocking the mutual charging among the plurality of batteries 20 connected in parallel when the battery device 10 is hot-plugged.
It is visible, the embodiment of the utility model provides a charge and discharge protection circuit can set up in every battery that battery device includes, through utilizing among the charge and discharge protection circuit ideal diode control circuit forward to switch on, reverse to and forward almost no pressure drop, no power loss's characteristic, when can solving battery device hot plug battery effectively, the problem of charging each other between the battery has still improved electric energy utilization when guaranteeing safe power supply.
Optionally, as shown in fig. 2, the ideal diode control circuit 50 includes a first switch circuit 501 and an ideal diode driver 502, the ideal diode driver 502 is connected to the first switch circuit 501, wherein:
the ideal diode driver 502 is used for blocking the mutual charging between the plurality of batteries 20 connected in parallel by driving the first switch circuit 501 when the battery device 10 is hot-plugged.
Optionally, the ideal diode driver 502 is specifically configured to, when the battery device 10 is hot plugged, drive the first switch circuit 501 to turn on to block a charging current from a first battery to a second battery in the multiple batteries 20 connected in parallel, where a voltage of the first battery is greater than a voltage of the second battery, that is, a battery with a higher voltage may be blocked from being charged to a battery with a lower voltage when the battery is hot plugged.
Optionally, an ideal diode driver 502 is used to control the on and off of the first switch circuit 501.
Alternatively, a specific implementation manner that the ideal diode driver 502 blocks mutual charging between the plurality of batteries 20 connected in parallel by driving the first switch circuit 501 may include:
in the case of hot plugging the battery in the battery device 10, the ideal diode driver 502 is used to control the first switch circuit 501 to be turned on to block the mutual charging between the plurality of batteries 20 connected in parallel, thereby ensuring the safety of the batteries when the batteries are hot plugged.
Alternatively, in the case that the battery of the battery device 10 is in a discharging state and the movable platform 60 does not move, the ideal diode driver 502 is used to control the first switch circuit 501 to be turned on.
Alternatively, in the case where the battery of the battery device 10 is in a discharge state and the movable platform 60 is moved, the ideal diode driver 502 is used to control the first switch circuit 501 to be turned off.
Optionally, the first switch circuit 501 includes a first field effect transistor.
Alternatively, as shown in fig. 4, the charge and discharge protection circuit 40 may further include a second switching circuit 70 for charging and a third switching circuit 80 for discharging, the second switching circuit 70 being connected in series with the third switching circuit 80, and the ideal diode control circuit 50 being connected in parallel with the second switching circuit 70, in addition to the ideal diode control circuit 50.
Optionally, as shown in fig. 5, the charge and discharge protection circuit 40 may further include a first driver 71 and a second driver 81, the first driver 71 is connected to the second switch circuit 70, and the second driver 81 is connected to the third switch circuit 80.
Optionally, the driver may drive the switch circuit according to the state of the battery 20 and/or the movable platform 60, and in the case that the battery device 10 is hot plugged, the first driver 71 is used to control the second switch circuit 70 to be turned on, and the second driver 81 is used to control the third switch circuit 80 to be turned on, that is, both the second switch circuit 70 and the third switch circuit 80 are turned on at this time.
Alternatively, in the case that the battery of the battery device 10 is in a discharging state and the movable platform 60 does not move, the first driver 71 is used for controlling the second switch circuit 70 to be turned off, and the second driver 81 is used for controlling the third switch circuit 80 to be turned on.
Alternatively, in the case that the battery of the battery device 10 is in a discharging state and the movable platform 60 moves, the first driver 71 is used for controlling the second switch circuit 70 to be turned on, and the second driver 81 is used for controlling the third switch circuit 80 to be turned on.
Optionally, the second switching circuit 70 includes a second fet, and/or the third switching circuit 80 includes a third fet.
It should be noted that, for specific contents of this embodiment, reference may be made to corresponding descriptions in the foregoing embodiments, and details are not described here again.
The embodiment of the utility model provides a still provide a movable platform, movable platform includes: the body to and aforementioned battery device, this battery device locates the body, and this battery device is used for providing power for the body.
The modules or units in the embodiments of the present invention may be implemented by a general-purpose integrated circuit (such as a central processing unit CPU), or an Application Specific Integrated Circuit (ASIC).
The battery device, the charge-discharge protection circuit and the movable platform provided by the embodiment of the present invention are introduced in detail, and the structure, principle and implementation of the present invention are explained by applying specific examples, and the explanation of the above embodiments is only used to help understand the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (30)
1. A battery apparatus, comprising a plurality of batteries electrically connected, the plurality of batteries being connected in parallel, the plurality of batteries being configured to power a movable platform, each of the plurality of batteries comprising a cell and a charge-discharge protection circuit, wherein:
the charge and discharge protection circuit is connected between the battery cell and the movable platform;
the charging and discharging protection circuit comprises an ideal diode control circuit;
the ideal diode control circuit is used for blocking the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
2. The battery device of claim 1, wherein the ideal diode control circuit comprises a first switching circuit and an ideal diode driver coupled to the first switching circuit, wherein:
the ideal diode driver is used for driving the first switch circuit to block the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
3. The battery device according to claim 2, wherein the ideal diode driver is specifically configured to drive the first switch circuit to be turned on when the battery device is hot-plugged with a battery, so as to block a charging current from a first battery to a second battery in the plurality of batteries connected in parallel, and a voltage of the first battery is greater than a voltage of the second battery.
4. The battery device of claim 2, wherein the ideal diode driver is configured to control the first switching circuit to turn on and off.
5. The battery device according to claim 4, wherein in case of hot-plugging the battery device with the battery, wherein:
the ideal diode driver is used for controlling the first switch circuit to be switched on so as to block the mutual charging among the plurality of batteries connected in parallel.
6. The battery device of claim 4, wherein in the event that the battery of the battery device is in a discharged state and the movable platform is not moving, wherein:
and the ideal diode driver is used for controlling the first switch circuit to be started.
7. The battery device according to claim 4, wherein in a case where the battery of the battery device is in a discharge state and the movable platform is moved, wherein:
the ideal diode driver is used for controlling the first switch circuit to be closed.
8. The battery device according to claim 1, wherein the charge and discharge protection circuit further comprises a second switching circuit for charging and a third switching circuit for discharging, the second switching circuit being connected in series with the third switching circuit, the ideal diode control circuit being connected in parallel with the second switching circuit.
9. The battery device according to claim 8, wherein the charge and discharge protection circuit further comprises a first driver and a second driver, the first driver is connected to the second switch circuit, the second driver is connected to the third switch circuit, wherein:
the first driver is used for controlling the second switch circuit to be switched on and off;
and the second driver is used for controlling the third switch circuit to be switched on and off.
10. The battery device according to claim 9, wherein in case of hot-plugging the battery device with the battery, wherein:
the first driver is used for controlling the second switch circuit to be started;
and the second driver is used for controlling the third switch circuit to be started.
11. The battery device of claim 9, wherein in the event that the battery of the battery device is in a discharged state and the movable platform is not moving, wherein:
the first driver is used for controlling the second switch circuit to be closed;
and the second driver is used for controlling the third switch circuit to be started.
12. The battery device according to claim 9, wherein in a case where the battery of the battery device is in a discharge state and the movable platform is moved, wherein:
the first driver is used for controlling the second switch circuit to be started;
and the second driver is used for controlling the third switch circuit to be started.
13. The battery device of claim 2, wherein the first switching circuit comprises a first field effect transistor.
14. The battery device of claim 8, wherein the second switching circuit comprises a second field effect transistor, and/or wherein the third switching circuit comprises a third field effect transistor.
15. The battery apparatus of claim 1, wherein the movable platform comprises one or more of a drone, a handheld pan-tilt head, and an automobile, a cloud-platform vehicle.
16. A charge-discharge protection circuit applied to each of a plurality of electrically connected batteries comprised by a battery device, the plurality of batteries being connected in parallel, the plurality of batteries being configured to power a movable platform, each battery further comprising a cell, wherein:
the charge and discharge protection circuit is connected between the battery cell and the movable platform;
the charging and discharging protection circuit comprises an ideal diode control circuit;
the ideal diode control circuit is used for blocking the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
17. The charge and discharge protection circuit of claim 16, wherein the ideal diode control circuit comprises a first switching circuit and an ideal diode driver coupled to the first switching circuit, wherein:
the ideal diode driver is used for driving the first switch circuit to block the mutual charging among the plurality of batteries connected in parallel when the batteries are hot-plugged in the battery device.
18. The charging and discharging protection circuit of claim 17, wherein the ideal diode driver is specifically configured to drive the first switch circuit to be turned on when the battery device is hot-plugged with a battery, so as to block a charging current from a first battery to a second battery in the plurality of batteries connected in parallel, and a voltage of the first battery is greater than a voltage of the second battery.
19. The charging and discharging protection circuit of claim 17, wherein the ideal diode driver is configured to control the first switch circuit to turn on and off.
20. The charging and discharging protection circuit according to claim 19, wherein in case of hot plugging the battery into the battery device, wherein:
the ideal diode driver is used for controlling the first switch circuit to be switched on so as to block the mutual charging among the plurality of batteries connected in parallel.
21. The charging and discharging protection circuit of claim 19, wherein in case that the battery of the battery device is in a discharging state and the movable platform is not moved, wherein:
and the ideal diode driver is used for controlling the first switch circuit to be started.
22. The charging and discharging protection circuit of claim 19, wherein in case that the battery of the battery device is in a discharging state and the movable platform moves, wherein:
the ideal diode driver is used for controlling the first switch circuit to be closed.
23. The charging and discharging protection circuit of claim 16, further comprising a second switching circuit for charging and a third switching circuit for discharging, the second switching circuit being connected in series with the third switching circuit, the ideal diode control circuit being connected in parallel with the second switching circuit.
24. The charging and discharging protection circuit of claim 23, further comprising a first driver and a second driver, the first driver being connected to the second switch circuit, the second driver being connected to the third switch circuit, wherein:
the first driver is used for controlling the second switch circuit to be switched on and off;
and the second driver is used for controlling the third switch circuit to be switched on and off.
25. The charging and discharging protection circuit according to claim 24, wherein in case of hot plugging the battery into the battery device, wherein:
the first driver is used for controlling the second switch circuit to be started;
and the second driver is used for controlling the third switch circuit to be started.
26. The charging and discharging protection circuit of claim 24, wherein in case that the battery of the battery device is in a discharging state and the movable platform is not moved, wherein:
the first driver is used for controlling the second switch circuit to be closed;
and the second driver is used for controlling the third switch circuit to be started.
27. The charging and discharging protection circuit of claim 24, wherein in case that the battery of the battery device is in a discharging state and the movable platform moves, wherein:
the first driver is used for controlling the second switch circuit to be started;
and the second driver is used for controlling the third switch circuit to be started.
28. The charge and discharge protection circuit of claim 17, wherein the first switching circuit comprises a first fet.
29. The charging and discharging protection circuit according to claim 23, wherein the second switching circuit comprises a second fet, and/or wherein the third switching circuit comprises a third fet.
30. A movable platform, comprising:
a body, and
the battery device of any one of claims 1-15, the battery device being disposed in the body;
wherein, the battery device is used for providing power for the machine body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020648369.4U CN212726492U (en) | 2020-04-24 | 2020-04-24 | Battery device, charge-discharge protection circuit and movable platform |
| PCT/CN2020/133352 WO2021212843A1 (en) | 2020-04-24 | 2020-12-02 | Battery apparatus and charging and discharging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020648369.4U CN212726492U (en) | 2020-04-24 | 2020-04-24 | Battery device, charge-discharge protection circuit and movable platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212726492U true CN212726492U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020648369.4U Expired - Fee Related CN212726492U (en) | 2020-04-24 | 2020-04-24 | Battery device, charge-discharge protection circuit and movable platform |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN212726492U (en) |
| WO (1) | WO2021212843A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078703A (en) * | 2021-03-08 | 2021-07-06 | 深圳市沛城智能控制技术有限公司 | Charging device and charging method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9845165B2 (en) * | 2014-07-16 | 2017-12-19 | Airogistic, L.L.C. | Methods and apparatus for unmanned aerial vehicle landing and launch |
| CN205564874U (en) * | 2016-04-07 | 2016-09-07 | 中银（宁波）电池有限公司 | Alkaline zinc-manganese cell for preventing leakage caused by over-discharge due to series connection |
| CN205882737U (en) * | 2016-05-10 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Direct current charging and discharging circuit and battery |
| CN110768361B (en) * | 2019-11-19 | 2024-02-02 | 格力博(江苏)股份有限公司 | Electric tool |
| CN110901396A (en) * | 2019-11-25 | 2020-03-24 | 航天时代飞鸿技术有限公司 | Anti-mutual-charging circuit and method for power supply of multiple battery packs of four-rotor aircraft |
| CN211790810U (en) * | 2020-01-13 | 2020-10-27 | 深圳市大疆创新科技有限公司 | Charging system, charger, battery pack and movable platform |
-
2020
- 2020-04-24 CN CN202020648369.4U patent/CN212726492U/en not_active Expired - Fee Related
- 2020-12-02 WO PCT/CN2020/133352 patent/WO2021212843A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078703A (en) * | 2021-03-08 | 2021-07-06 | 深圳市沛城智能控制技术有限公司 | Charging device and charging method |
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| WO2021212843A1 (en) | 2021-10-28 |
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