CN211556878U - Battery management device and unmanned aerial vehicle - Google Patents
Battery management device and unmanned aerial vehicle Download PDFInfo
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- CN211556878U CN211556878U CN201820403045.7U CN201820403045U CN211556878U CN 211556878 U CN211556878 U CN 211556878U CN 201820403045 U CN201820403045 U CN 201820403045U CN 211556878 U CN211556878 U CN 211556878U
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Abstract
The utility model provides a battery management device and unmanned aerial vehicle, the device, include: the battery management metering module is used for acquiring physical parameters of the electric core group; the battery management metering module comprises an electric quantity metering chip which is used for realizing corresponding functions according to the physical parameters; and the microprocessor module is electrically connected with the battery management metering module and is used for receiving the electric quantity value of the electric core group sent by the battery management metering module and controlling the electric core group to be in a discharging state when the time when the electric quantity value is greater than or equal to the upper limit threshold value exceeds a preset time limit. The utility model discloses the function that can make full use of battery management measurement chip self possesses realizes excessive pressure, under-voltage, overflow, excess temperature, the temperature of oweing to the electric core group to and the charge-discharge protection, therefore peripheral circuit has greatly been reduced, and realize the battery through microprocessor from discharging, thereby simplify battery management system's overall structure, promote the accommodation space of battery.
Description
Technical Field
The utility model relates to a battery management technology field especially relates to a battery management device and unmanned aerial vehicle.
Background
With the development of unmanned aerial vehicle technology, unmanned aerial vehicles are continuously evolving towards miniaturization and modularization. And the battery that occupies a large part of weight and volume of unmanned aerial vehicle has restricted unmanned aerial vehicle's further miniaturization to a certain extent. At present, the energy-to-weight ratio and the energy-to-volume ratio of the battery of the unmanned aerial vehicle are basically stabilized in a range, and if the battery capacity is filled in a limited volume as much as possible, a management system of the battery needs to be simplified.
In the prior art, safety protection such as overvoltage and overcurrent of a battery is often required to be realized through a complex battery management system, and autonomous charging and discharging control is performed on the battery according to the electric quantity state of the battery.
However, the circuit of the battery management system is complex, devices are multiple, a large amount of space inside the unmanned aerial vehicle is occupied, and the weight and the production cost of the unmanned aerial vehicle are increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery management device and unmanned aerial vehicle through the function that make full use of battery management metering module self possessed, simplifies battery management system's structure, promotes the accommodation space of battery.
In a first aspect, an embodiment of the present invention provides a battery management device, the battery includes a battery cell group, and the device includes: the battery management metering module is used for acquiring physical parameters of the battery pack, and the physical parameters comprise: at least one of a voltage value, a temperature value, and an output current value; the battery management metering module comprises an electric quantity metering chip, the electric quantity metering chip is used for realizing corresponding functions according to the physical parameters, and the functions comprise: any one or more of overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection and charge and discharge protection;
the microprocessor module is electrically connected with the battery management metering module and is used for receiving the electric quantity value of the electric core group sent by the battery management metering module and controlling the electric core group to be in a discharging state when the time when the electric quantity value is greater than or equal to the upper limit threshold value exceeds a preset time limit; the electric quantity value is obtained by the battery management metering module through conversion according to the voltage value of the electric core group.
Optionally, the battery management metering module further includes: the device comprises a voltage sampling circuit, a temperature sensor and a current sampling circuit; the voltage sampling circuit, the temperature sensor and the current sampling circuit are all electrically connected with the electric quantity metering chip; wherein:
the voltage sampling circuit is electrically connected with the electric core group and is used for acquiring the voltage value of the electric core group; sending the voltage value to the electric quantity metering chip;
the temperature sensor is electrically connected with the electric core group and used for acquiring the temperature value of the electric core group and sending the temperature value to the electric quantity metering chip;
the current sampling circuit is electrically connected with the electric core group and used for acquiring the output current value of the electric core group and sending the output current value to the electric quantity metering chip;
the electric quantity metering chip is specifically used for calculating the electric quantity value of the electric core group according to the received voltage value and sending the electric quantity value to the microprocessor module; according to the received voltage value, performing overvoltage and undervoltage protection on the electric core group; according to the received temperature value, performing over-temperature and under-temperature protection on the electric core group; and performing overcurrent and charge-discharge protection on the electric core group according to the received output current value.
Optionally, the method further comprises: the first controllable switch is connected with the electric core group and the main loop and is connected with the electric quantity metering chip; the first controllable switch is used for being in a conducting state or a disconnecting state according to a control signal output by the electric quantity metering chip;
the electric quantity metering chip is specifically used for controlling the first controllable switch to be switched off when the voltage value of the electric core group is not within a preset voltage range, so as to cut off the connection between the electric core group and the main loop.
Optionally, the method further comprises: the first controllable switch is connected with the electric core group and the main loop and is connected with the electric quantity metering chip;
the electric quantity metering chip is specifically used for controlling the first controllable switch to be conducted when the temperature of the electric core group is greater than a first temperature threshold and smaller than a second temperature threshold so as to enable the electric core group and the main loop to be communicated, and the first temperature threshold is smaller than the second temperature threshold;
the device further comprises: the preheating circuit is arranged in the surrounding area of the electric core group and is connected with the electric quantity metering chip through a second controllable switch; the electric quantity metering chip is specifically used for controlling the conduction of the second controllable switch when the temperature of the electric core group is less than or equal to a first temperature threshold value, so that the preheating circuit heats the electric core group until the temperature of the electric core group is greater than the first temperature threshold value; the second controllable switch is used for being in a conducting state or a disconnecting state according to the control signal output by the electric quantity metering chip;
the device further comprises: the radiator is arranged in the surrounding area of the electric core group and is connected with the electric quantity metering chip through a third controllable switch; the electric quantity metering chip is specifically used for controlling the conduction of the third controllable switch when the temperature of the electric core group is greater than or equal to a second temperature threshold value, so that the radiator cools the electric core group until the temperature of the electric core group is less than the second temperature threshold value; the third controllable switch is used for being in a conducting state or a disconnecting state according to the control signal output by the electric quantity metering chip; the third controllable switch tube comprises: any one of field effect transistor, power switch tube, thyristor and relay.
Optionally, the method further comprises:
the first controllable switch is connected with the electric core group and the main loop and is connected with the electric quantity metering chip; the electric quantity metering chip is specifically used for controlling the first controllable switch to be switched off when the current value in the main loop is not within a preset current range, so as to cut off the connection between the electric core group and the main loop.
Optionally, the method further comprises:
the fourth controllable switch is connected with the electric core group and the pre-charging circuit and is connected with the electric quantity metering chip; the electric quantity metering chip is specifically used for controlling the conduction of the fourth controllable switch when the electric quantity value of the electric core group is smaller than the lower limit threshold value, so that the electric core group is communicated with the pre-charging circuit to enable the battery to be in a charging state; the fourth controllable switch is used for being in a conducting state or a disconnecting state according to the control signal output by the electric quantity metering chip.
Optionally, the method further comprises:
the data port is connected with the electric quantity metering chip and the display; the electric quantity metering chip is specifically used for transmitting the battery state data to the display through the data port;
the display is used for displaying physical parameters of the cell group, and the physical parameters comprise: at least one of the electric quantity, the voltage value, the output current value and the temperature value of the electric core group.
Optionally, the battery management metering module further includes:
the key input panel is electrically connected with the electric quantity metering chip and used for receiving key information input by a user, and the key information comprises: disconnecting/connecting main loop information and disconnecting/connecting pre-charging circuit information; wherein:
the disconnection/connection main loop information is used for indicating the electric quantity metering chip to control the first controllable switch connecting the electric core group and the main loop to be in a disconnection or connection state; and the disconnection/connection pre-charging circuit information is used for indicating the electric quantity metering chip to control the fourth controllable switch for connecting the electric core group and the pre-charging circuit to be in a disconnection or connection state.
Optionally, the battery management metering module further includes:
the communication port is electrically connected with the electric quantity metering chip and is used for sending the physical parameters of the electric core group to a remote host and/or receiving a control instruction sent to the electric quantity metering chip by the remote host so as to enable the electric quantity metering chip to execute corresponding functions according to the control instruction; wherein the physical parameters include: at least one of the electric quantity, the voltage value, the output current value and the temperature value of the electric core group.
Optionally, the microprocessor module comprises: the device comprises a microprocessor, a self-discharge circuit and a linear stabilized voltage power supply; the microprocessor is electrically connected with the battery management metering module, and the self-discharge circuit and the linear voltage-stabilized power supply are electrically connected with the microprocessor; wherein:
the linear voltage-stabilized power supply is used for supplying stable electric energy to the microprocessor;
and the microprocessor is used for receiving the electric quantity value of the electric core group sent by the battery management metering module, and controlling a fifth controllable switch for connecting the electric core group and the self-discharging circuit to be in a conducting state when the time that the electric quantity value of the electric core group is greater than or equal to the upper limit threshold value exceeds a preset time limit, so that the electric core group is in a self-discharging state.
Optionally, the self-discharge circuit comprises: a fifth controllable switch, a first bias resistor and a discharge resistor; one end of the discharge resistor is connected with the anode of the electric core group, the other end of the discharge resistor is connected with the first end of a fifth controllable switch, and the control end of the fifth controllable switch is respectively connected with the first output port of the microprocessor and one end of the bias resistor; the second end of the fifth controllable switch and the other end of the first bias resistor are both grounded; a control end of the fifth controllable switch receives a control signal sent by a first output port of the microprocessor, so that the fifth controllable switch is in a conducting state or a disconnecting state;
the microprocessor controls the fifth controllable switch to be in a conducting state or a cut-off state through a switching signal of the first output port; when the fifth controllable switch is in a conducting state, the electric core group is connected with the self-discharging circuit so as to consume electric energy in the electric core group through the discharging resistor.
Optionally, the fifth controllable switch is a field effect transistor; the first end of the fifth controllable switch is a drain electrode of a field effect transistor, the source electrode of the second end of the fifth controllable switch is a source electrode of the field effect transistor, and the control end of the fifth controllable switch is a grid electrode of the field effect transistor.
Optionally, the apparatus further comprises: the charge-discharge control circuit who is connected with microprocessor, charge-discharge control circuit includes: a sixth controllable switch, a seventh controllable switch, an eighth controllable switch, a second bias resistor, a third bias resistor, a fourth bias resistor, and a fifth bias resistor;
a first end of the sixth controllable switch is grounded through a fourth bias resistor and a fifth bias resistor, and the first end of the sixth controllable switch forms a positive connection port of an external charging circuit or an external discharging circuit; a second end of the sixth controllable switch is connected with one end of a second bias resistor and a second end of the seventh controllable switch respectively, a control end of the sixth controllable switch is connected with a first end of the eighth controllable switch, and the other end of the second bias resistor is connected with a first end of the eighth controllable switch; the control end of the seventh controllable switch is connected with the first end of the eighth controllable switch, and the second end of the seventh controllable switch is connected with the anode of the electric core group; the second end of the eighth controllable switch is grounded, and the control end of the eighth controllable switch is connected with the second output port of the microprocessor and grounded through a third bias resistor;
the microprocessor controls the eighth controllable switch to be in a conducting state or a cut-off state through a switching signal of the second output port; when the eighth controllable switch is in a conducting state, the sixth controllable switch and the seventh controllable switch are in a conducting state, and the electric core group is communicated with the external charging circuit; or the external discharge circuit is communicated;
the microprocessor is specifically configured to:
when the electric quantity value of the electric core group is smaller than the lower limit threshold value, the switch signal sent by the second output port is used for controlling the eighth controllable switch to be in a conducting state so as to enable the electric core group to be communicated with an external charging circuit; or
And when the time that the electric quantity value of the electric core group is greater than or equal to the upper limit threshold value exceeds the preset time limit, receiving a switching signal sent by the microprocessor through the second output port to control the eighth controllable switch to be in a conducting state, so that the external discharging circuit of the electric core group is communicated.
The second aspect, the embodiment of the utility model provides an unmanned aerial vehicle, including two more electric core groups, still include: the battery management device according to the first aspect, configured to perform management of the cell pack.
The utility model provides a battery management device and unmanned aerial vehicle gathers through battery management metering module the physical parameter of electric core group, physical parameter includes: any one of a voltage value, a temperature value and an output current value, and realizing corresponding functions according to the collected physical parameters through an electric quantity metering chip in the battery management metering module, wherein the functions comprise: any one or more of overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection and charge and discharge protection; the microprocessor module is used for receiving the electric quantity value of the electric core group sent by the battery management metering module, and controlling the electric core group to be in a discharging state when the time that the electric quantity value of the electric core group is larger than or equal to the upper limit threshold value exceeds a preset time limit. The utility model discloses the function that can make full use of battery management metering chip self possesses realizes excessive pressure, under-voltage, overflow, excess temperature, the temperature of oweing to the electric core group to and the charge-discharge protection, consequently greatly reduced the peripheral circuit in the battery, and realize the battery through microprocessor from discharging, thereby simplified whole battery management system structure, promote the accommodation space of battery, more do benefit to the application the miniaturized development of unmanned aerial vehicle of battery management device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a battery management device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery management device according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery management device according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a self-discharge circuit in a battery management device according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram of a circuit configuration for charging or discharging a battery through an external port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In the following, some terms in the present application are explained to facilitate understanding by those skilled in the art:
1) an unmanned plane is a short name of an unmanned plane and is an unmanned plane operated by radio remote control equipment and a self-contained program control device.
2) The battery, the embodiment of the utility model provides an in mention the battery mainly used unmanned aerial vehicle, unmanned aerial vehicle battery on the market mainly adopts the polymer lithium cell. The lithium cell is other batteries relatively, and is capacious, and the multiplying power is high, and explosive power is strong for unmanned aerial vehicle duration and flying speed promote greatly. It is understood that the battery in the embodiment of the present invention may be applied to any other electronic device that needs to use a battery, and is not limited herein.
The utility model provides a battery management device, the battery power that can be right carry out real-time supervision, when the time that the electric quantity of electric core group is greater than or equal to the upper limit threshold value exceeded when predetermineeing the time limit, the microprocessor control battery through the low-power consumption links to each other with discharge circuit for the battery is in from discharge state. The utility model provides a device realizes excessive pressure, under-voltage, overflows, excess temperature, the temperature owes to the electric core group through the function that make full use of battery management metering module self possessed to and the charge-discharge protection, and realize the battery through microprocessor from discharging, thereby simplified battery management system's structure, promoted the accommodation space of battery.
Fig. 1 is a schematic structural diagram of a battery management device according to an embodiment of the present invention, as shown in fig. 1, the device in this embodiment may include: a battery management metering module 10 and a microprocessor module 20; the electric quantity metering chip in the battery management metering module 10 is electrically connected with the microprocessor module 20, wherein: the battery management metering module 10 is used for acquiring physical parameters of the electric core group, wherein the physical parameters comprise: any one of the voltage value, the temperature value and the output current value, and realizing corresponding functions by the electric quantity metering chip according to the collected physical parameters, wherein the functions comprise: any one or more of overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection and charge and discharge protection; the microprocessor module 20 is used for receiving the electric quantity value of the electric core group sent by the cell management metering module 10 and controlling the electric core group to be in a discharging state when the time that the electric quantity value of the electric core group is greater than or equal to the upper limit threshold value exceeds a preset time limit; the electric quantity value of the electric core group is obtained by the battery management metering module according to the conversion of the voltage value of the electric core group.
In the existing battery management system, in order to realize overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection, and charge and discharge protection of the battery, a plurality of peripheral protection circuits are often required to be set, for example: overcurrent protection circuits, overvoltage protection circuits, overtemperature protection circuits, and the like, which occupy internal accommodation space and limit the space in which batteries can be placed to some extent. And in the device of this embodiment, make full use of the function of electric quantity measurement chip self to only need provide the physical parameter of electric core group to the measurement chip, just can realize the various protect function to the electric core group. Therefore, the peripheral protection circuit is omitted in the battery management system, thereby increasing the space in which the battery can be placed.
In this embodiment, the physical parameters of the electric core pack are collected by the battery management metering module 10, and the physical parameters include: any one of a voltage value, a temperature value and an output current value, and realizing corresponding functions according to the collected physical parameters through an electric quantity metering chip in the battery management metering module, wherein the functions comprise: any one or more of overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection and charge and discharge protection; the microprocessor module is used for receiving the electric quantity value of the electric core group sent by the battery management metering module, and controlling the electric core group to be in a discharging state when the time that the electric quantity value of the electric core group is larger than or equal to the upper limit threshold value exceeds a preset time limit. The utility model discloses the function that can make full use of battery management metering chip self possesses realizes excessive pressure, under-voltage, overflow, excess temperature, the temperature of oweing to the electric core group to and the charge-discharge protection, consequently greatly reduced the peripheral circuit of battery, and realize the battery through microprocessor from discharging, thereby simplified whole battery management system structure, promoted the accommodation space of battery.
Fig. 2 is a schematic structural diagram of a battery management device according to a second embodiment of the present invention, as shown in fig. 2, a battery management metering module 10 includes: the device comprises an electric quantity metering chip 11, a voltage sampling circuit 12, a temperature sensor 13 and a current sampling circuit 14; the voltage sampling circuit 12, the temperature sensor 13 and the current sampling circuit 14 are all electrically connected with the electric quantity metering chip 11. Wherein: the voltage sampling circuit 12 is used for acquiring the voltage value of the electric core group; and sends the voltage value to the electricity quantity metering chip 11. And the temperature sensor 13 is used for acquiring the temperature value of the electric core group and sending the temperature value to the electric quantity metering chip 11. And the current sampling circuit 14 is used for acquiring the output current value of the electric core group and sending the output current value to the electric quantity metering chip 11. The electric quantity metering chip 11 is used for calculating the electric quantity value of the electric core group according to the received voltage value and sending the electric quantity value to the microprocessor module 20; according to the received voltage value, performing overvoltage and undervoltage protection on the electric core group; according to the received temperature value, performing over-temperature and under-temperature protection on the electric core group; and performing overcurrent and charge-discharge protection on the electric core group according to the received output current value. And the microprocessor module 20 is used for receiving the voltage value acquired by the cell management metering module 10 and controlling the cell group to be in a discharging state when the time that the electric quantity value of the cell group is greater than or equal to the upper limit threshold exceeds a preset time limit.
In this embodiment, the method may further include: the first controllable switch is connected with the electric quantity metering chip; the first controllable switch is used for being in a conducting state or a disconnecting state according to a control signal output by the electric quantity metering chip 11; the first controllable switch tube comprises: any one of a field effect transistor, a power switching tube, a thyristor, a relay, and the like. The electric quantity metering chip 11 is specifically used for controlling the first controllable switch to be switched off when the voltage value of the electric core group is not within a preset voltage range, so as to cut off the connection between the electric core group and the main loop. For example, the connection port of the electricity quantity measuring chip 11 outputs a level signal to make the first controllable switch connecting the electric core group and the main circuit in an off state. Thereby realizing overvoltage and undervoltage protection of the electric core group. The main circuit in this embodiment is a general term for all conductive circuits in the switch circuit connected to the electric core set for transmitting the charging current or the discharging current.
In this embodiment, the preheating treatment or the heat dissipation treatment can be performed on the electric core assembly by controlling the first controllable switch. Wherein, first controllable switch is connected with electric core group and major loop, just first controllable switch with electric quantity measurement chip 11 is connected. When the temperature of the electric core group is greater than a first temperature threshold and less than a second temperature threshold, the first controllable switch is controlled to be switched on, so that the electric core group is communicated with the main loop, and the first temperature threshold is less than the second temperature threshold. Optionally, the apparatus further comprises: the preheating circuit is arranged in the surrounding area of the electric core group and is connected with the electric quantity metering chip 11 through a second controllable switch; the electric quantity metering chip 11 is specifically configured to control the conduction of the second controllable switch when the temperature of the electric core group is less than or equal to a first temperature threshold value, so that the preheating circuit heats the electric core group until the temperature of the electric core group is greater than the first temperature threshold value; the second controllable switch is used for being in a conducting state or a disconnecting state according to a control signal output by the electric quantity metering chip 11; the second controllable switch tube comprises: any one of a field effect transistor, a power switching tube, a thyristor, a relay, and the like. The device further comprises: the radiator is arranged in the surrounding area of the electric core group and is connected with the electric quantity metering chip 11 through a third controllable switch; the electric quantity metering chip 11 is specifically configured to control the third controllable switch to be turned on when the temperature of the electric core group is greater than or equal to a second temperature threshold value, so that the radiator cools the electric core group until the temperature of the electric core group is less than the second temperature threshold value; the third controllable switch is used for being in a conducting state or a disconnecting state according to the control signal output by the electric quantity metering chip; the third controllable switch tube comprises: any one of a field effect transistor, a power switching tube, a thyristor, a relay, and the like.
In this embodiment, when the current value in the main circuit is not within the preset current range, the first controllable switch is controlled to be turned off so as to cut off the connection between the electric core set and the main circuit. For example, the connection port of the electricity quantity measuring chip 11 outputs a level signal to make the first controllable switch connecting the electric core group and the main circuit in an off state. Thereby realizing overcurrent and undercurrent protection of the electric core group. By applying the principle in the embodiment, when a short circuit occurs in a loop formed by the electric core group, the electric core group is automatically disconnected with a main loop circuit, so that the short circuit protection of the electric core group is realized.
In this embodiment, the apparatus further includes: the fourth controllable switch is connected with the electric core group and the pre-charging circuit and is connected with the electric quantity metering chip 11; the electric quantity metering chip 11 is specifically configured to control the fourth controllable switch to be turned on when the electric quantity value of the electric core group is smaller than the lower threshold value, so that the electric core group and the pre-charging circuit are communicated to enable the battery to be in a charging state; the fourth controllable switch is used for being in a conducting state or a disconnecting state according to the control signal output by the electric quantity metering chip; the fourth controllable switch tube comprises: any one of a field effect transistor, a power switching tube, a thyristor, a relay, and the like. The pre-charging circuit in this embodiment is a circuit connected to the electric core assembly and providing electric energy to the electric core assembly, for example, the pre-charging circuit may be a voltage converting circuit, an input end of which is connected to the electric supply, and an output end of which is connected to the electric core assembly, and is used for converting the electric supply into a direct current according with characteristics of the electric core assembly.
The model of the electric quantity metering chip in the embodiment includes: BQ40Z50 and BQ30Z55, etc.; it should be noted that the present embodiment does not limit the specific model of the battery metering chip.
In this embodiment, the physical parameters of the electric core pack are collected by the battery management metering module 10, and the physical parameters include: any one of a voltage value, a temperature value and an output current value, and realizing corresponding functions according to the collected physical parameters through an electric quantity metering chip in the battery management metering module, wherein the functions comprise: any one or more of overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection and charge and discharge protection; the microprocessor module is used for receiving the electric quantity value of the electric core group sent by the battery management metering module, and controlling the electric core group to be in a discharging state when the time that the electric quantity value of the electric core group is larger than or equal to the upper limit threshold value exceeds a preset time limit. The utility model discloses the function that can make full use of battery management metering chip self possesses realizes excessive pressure, under-voltage, overflow, excess temperature, the temperature of oweing to the electric core group to and charge-discharge protection, thereby greatly reduced the peripheral circuit of battery, and realize the battery through microprocessor from discharging, thereby simplified whole battery management system structure, promoted the accommodation space of battery.
Fig. 3 is a schematic structural diagram of a battery management device according to a third embodiment of the present invention, as shown in fig. 3, the device in this embodiment may include: a battery management metering module 10 and a microprocessor module 20. The battery management metering module 10 includes: the device comprises an electric quantity metering chip 11, a voltage sampling circuit 12, a temperature sensor 13, a current sampling circuit 14, a liquid crystal display 15, a key input panel 16, a communication port 17, a main loop control port 18 and a pre-charging circuit control port 19. The microprocessor module 20 includes: microprocessor 21, linear regulated power supply 22, self-discharge circuit 23, etc. The battery management metering module 10 fully utilizes the integrated function of the electric quantity metering chip 11, collects the temperature of the cell group through the temperature sensor 13, collects the voltage value of the cell group through the voltage sampling circuit 12, and collects the output current value of the cell group through the current sampling circuit 14. And then processing the collected temperature, voltage value and output current of the electric core group. And the controllable switch connecting the main loop and the electric core group is controlled to be in a conducting or stopping state through the control signal output by the main loop control port 18; the controllable switch connecting the electric core group and the pre-charging circuit is controlled to be in a conducting or stopping state through a control signal output by a control port 19 of the pre-charging circuit; the controllable switch in this embodiment includes: any one of a field effect transistor, a power switching tube, a thyristor, a relay, and the like. Therefore, the internal integrated function of the electricity metering chip 11 is utilized to realize the over-temperature, under-temperature, charge-discharge short circuit, overvoltage, undervoltage and other safety protection and pre-charging functions of the cell group. The microprocessor module 20 realizes the self-discharge function of the battery through a low-power-consumption microprocessor 21, and communicates the electric core group with the self-discharge circuit 23 when the time that the electric quantity value of the electric core group is greater than or equal to the upper limit threshold value exceeds the preset time limit, so that the battery is in a discharge state.
In this embodiment, since the battery metering chip 11 does not have a self-discharge function, if the battery is not used after being kept in a high-power state for a long time during the use of the battery, the service life of the battery cell may be adversely affected, and even the cell may swell. The self-discharge state of the battery refers to: when the electric quantity of the electric core group is larger than a preset value and the unused time of the battery is larger than or equal to an upper limit value, the electric quantity of the battery is automatically consumed. The electric quantity calculated in the battery metering chip is obtained through the microprocessor, and when the time that the electric quantity of the electric core group is larger than or equal to the upper limit threshold value exceeds the preset time limit, the electric core group is communicated with the self-discharging circuit, so that the battery is in a discharging state. Alternatively, a model BJ8P508ESOT23-6 microprocessor may be employed.
Optionally, the apparatus in fig. 3 can also display the physical parameters of the electric core group synchronously through the liquid crystal display 15, and the physical parameters include: at least one of electric quantity, voltage value, output current value and temperature value.
Optionally, the apparatus in fig. 3 may further send the battery status data to the remote host through the communication port 17 via the electricity metering chip 11, and/or receive a control instruction sent by the remote host to the electricity metering chip 11, so that the electricity metering chip 11 executes a corresponding function according to the control instruction.
In this embodiment, the voltage sampling circuit 12 electrically connected to the battery metering chip 11 may be used to collect the voltage value of the electric core set in real time, and then transmit the collected voltage value to the battery metering chip 11. The voltage sampling circuit 12 in this embodiment may be integrated into the battery metering chip, or may be a voltage sampling circuit that is provided independently of the battery metering chip.
In this embodiment, the key input panel 16 electrically connected to the electric quantity metering chip 11 may further receive key information input by a user, where the key information includes: disconnecting or connecting the main circuit information and disconnecting or connecting the pre-charging information. Wherein: the information of the disconnected or connected main loop is used for indicating the electric quantity metering chip 11 to control the controllable switch for connecting the electric core group and the main loop to be disconnected or connected; the disconnection or connection pre-charging information is used for indicating the electric quantity metering chip 11 to control the controllable switch for connecting the electric core group and the pre-charging to be in a disconnection or connection state.
In this embodiment, the key input panel 16 can receive a key signal input by a user, for example, when the electric quantity measuring chip is subjected to overvoltage, overcurrent, overtemperature, and charge/discharge short circuit, and the electric core assembly is disconnected from the main circuit, the user can input the key signal through the key input panel to recover the connection between the electric core assembly and the main circuit.
Fig. 4 is a schematic structural diagram of a self-discharge circuit in a battery management device according to a fourth embodiment of the present invention, as shown in fig. 4, the self-discharge circuit includes: a fifth controllable switch Q1, a first bias resistor R1, a discharge resistor R2; one end of the discharge resistor R2 is connected with the anode of the electric core group, the other end of the discharge resistor R2 is connected with the drain of a fifth controllable switch Q1, and the grid of the fifth controllable switch Q1 is respectively connected with the first output port of the microprocessor and one end of a bias resistor R1; the source of the fifth controllable switch Q1 and the other end of the first bias resistor R1 are both grounded; the microprocessor controls the fifth controllable switch Q1 to be in a conducting state or a blocking state through a switching signal of the first output port; when the fifth controllable switch Q1 is in a conducting state, the cell group is connected to the self-discharging circuit to consume the electric energy in the cell group through the discharging resistor R2. In particular, the self-discharge circuit may be controlled by an I/O port of the microprocessor. For example, the SELF _ DSG port is an I/O port of the microprocessor, and when the SELF _ DSG outputs a high level, the microprocessor controls the MOS transistor Q1 (for example, an NMOS device with a model AO3404 is selected) to be in a conducting state, where the discharging resistor R2 generates heat to consume the electric quantity of the electric core group. When the port SELF _ DSG outputs a low level, the MOS transistor Q1 is in the off state, and the SELF-discharge state stops.
Alternatively, the microprocessor may control the MOS transistor Q1 to be in the on or off state through a Pulse Width Modulation (PWM) signal. In fig. 4, the port BAT + represents the highest voltage of the electric core set, and R1 represents the bias resistance. The self-discharge process of the battery mainly consumes electricity by the heat generated by the discharge resistor.
Fig. 5 is a schematic diagram of a circuit configuration for charging or discharging a battery through an external port. As shown in fig. 5, includes: a sixth controllable switch Q5, a seventh controllable switch Q6, an eighth controllable switch Q7, a second bias resistor R22, a third bias resistor R31, a fourth bias resistor R25, and a fifth bias resistor R30; the drain of the sixth controllable switch Q5 is grounded through a fourth bias resistor R25 and a fifth bias resistor R30, and the drain of the sixth controllable switch Q5 constitutes a positive connection port of an external charging circuit or an external discharging circuit; a source of the sixth controllable switch Q5 is connected to one end of a second bias resistor R22 and a source of a seventh controllable switch Q6, respectively, a gate of the sixth controllable switch Q5 is connected to a drain of an eighth controllable switch Q7, and the other end of the second bias resistor R22 is connected to a drain of an eighth controllable switch Q7; the grid electrode of the seventh controllable switch Q6 is connected with the drain electrode of an eighth controllable switch Q7, and the source electrode of the seventh controllable switch Q6 is connected with the positive electrode of the electric core group; the source of the eighth controllable switch Q7 is grounded, the gate of the eighth controllable switch Q7 is connected to the second output port of the microprocessor, and is grounded through a third bias resistor R31; the microprocessor controls the eighth controllable switch Q7 to be in an on state or an off state through a switching signal of the second output port; when the eighth controllable switch Q7 is in a conducting state, the sixth controllable switch Q5 and the seventh controllable switch Q6 are in a conducting state, and the electric core group is communicated with the external charging circuit; or the external discharge circuit is communicated; the microprocessor is specifically configured to: when the electric quantity of the electric core group is smaller than the lower limit threshold value, the switch signal sent by the second output port is used for controlling the eighth controllable switch Q7 to be in a conducting state, so that the electric core group is communicated with an external charging circuit; or when the time that the electric quantity of the electric core group is greater than or equal to the upper limit threshold value exceeds the preset time limit, receiving a switching signal sent by the microprocessor through the second output port to control the eighth controllable switch Q7 to be in a conducting state, so that the discharging circuit outside the electric core group is communicated.
Specifically, the port PAD + and the port PAD-are respectively the positive electrode and the negative electrode of an external charging and discharging circuit, the network ADC is an I/O port of the microprocessor and used for detecting charging and discharging voltage, the network PACK + port is connected to an output port of a battery (electric core group), and the discharge is an I/O of the microprocessor. The eighth controllable switch Q7 is an NMOS device, and the sixth controllable switch Q5 and the seventh controllable switch Q6 are PMOS devices. When discharging is required, the discharge port outputs a high level, so that the eighth controllable switch Q7 is in a conducting state. When the eighth controllable switch Q7 is in the on state, the gates of the sixth controllable switch Q5 and the seventh controllable switch Q6 are pulled low, so that the output voltage of the battery can be conducted to the port PAD +, and the external discharge can be performed. When the PAD + port is connected with the external charger, the ADC port can monitor the charging voltage in real time, and when the detected voltage meets the minimum charging threshold, the microprocessor controls the discharge port to output a high level to make the eighth controllable switch Q7 in a conducting state, and at this time, the gates of the sixth controllable switch Q5 and the seventh controllable switch Q6 are pulled low, so that the external charging circuit charges the battery (the battery pack). It should be noted that, in this embodiment, the specific types of the sixth controllable switch Q5, the seventh controllable switch Q6, and the eighth controllable switch Q7 are not limited, and the sixth controllable switch Q5, the seventh controllable switch Q6, and the eighth controllable switch Q7 may adopt: any one of a field effect transistor, a power switching tube, a thyristor, a relay, and the like.
In this embodiment, the physical parameters of the electric core pack are collected by the battery management metering module 10, and the physical parameters include: any one of a voltage value, a temperature value and an output current value, and realizing corresponding functions according to the collected physical parameters through an electric quantity metering chip in the battery management metering module, wherein the functions comprise: any one or more of overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection and charge and discharge protection; the microprocessor module is used for receiving the electric quantity value of the electric core group sent by the battery management metering module, and controlling the electric core group to be in a discharging state when the time that the electric quantity value of the electric core group is larger than or equal to the upper limit threshold value exceeds a preset time limit. The utility model discloses the function that can make full use of battery management metering chip self possesses realizes excessive pressure, under-voltage, overflow, excess temperature, the temperature of oweing to the electric core group to and the charge-discharge protection, consequently greatly reduced the peripheral circuit of battery, and realize the battery through microprocessor from discharging, thereby simplified whole battery management system structure, promoted the accommodation space of battery. Be favorable to adopting above-mentioned battery management device's unmanned aerial vehicle's miniaturized development.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (14)
1. A battery management device, the battery includes electric core group, its characterized in that includes:
the battery management metering module is used for acquiring physical parameters of the battery pack, and the physical parameters comprise: at least one of a voltage value, a temperature value, and an output current value; the battery management metering module comprises an electric quantity metering chip, the electric quantity metering chip is used for realizing corresponding functions according to the physical parameters, and the functions comprise: any one or more of overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection, undertemperature protection and charge and discharge protection;
the microprocessor module is electrically connected with the battery management metering module and is used for receiving the electric quantity value of the electric core group sent by the battery management metering module, wherein the electric quantity value is obtained by the battery management metering module through conversion according to the voltage value of the electric core group; when the time that the electric quantity value is greater than or equal to the upper limit threshold value exceeds a preset time limit, the electric core group is in a discharging state;
the microprocessor module includes: the device comprises a microprocessor, a self-discharge circuit and a linear stabilized voltage power supply; the microprocessor is electrically connected with the battery management metering module, and the self-discharge circuit and the linear voltage-stabilized power supply are electrically connected with the microprocessor; wherein:
the linear voltage-stabilized power supply is used for supplying stable electric energy to the microprocessor;
the microprocessor is used for receiving the electric quantity value of the electric core group sent by the battery management metering module; when the time that the electric quantity value is greater than or equal to the upper limit threshold value exceeds a preset time limit, the electric core group and a fifth controllable switch of the self-discharging circuit are in a conducting state, so that the electric core group is in a self-discharging state.
2. The apparatus of claim 1, wherein the battery management metering module further comprises: the device comprises a voltage sampling circuit, a temperature sensor and a current sampling circuit; the voltage sampling circuit, the temperature sensor and the current sampling circuit are all electrically connected with the electric quantity metering chip; wherein:
the voltage sampling circuit is electrically connected with the electric core group and is used for acquiring the voltage value of the electric core group; sending the voltage value to the electric quantity metering chip;
the temperature sensor is electrically connected with the electric core group and used for acquiring the temperature value of the electric core group and sending the temperature value to the electric quantity metering chip;
the current sampling circuit is electrically connected with the electric core group and used for acquiring the output current value of the electric core group and sending the output current value to the electric quantity metering chip;
the electric quantity metering chip is specifically used for sending the electric quantity value to the microprocessor module; according to the received voltage value, performing overvoltage and undervoltage protection on the electric core group; according to the received temperature value, performing over-temperature and under-temperature protection on the electric core group; and performing overcurrent and charge-discharge protection on the electric core group according to the received output current value.
3. The apparatus of claim 1, further comprising: the first controllable switch is connected with the electric core group and the main loop and is connected with the electric quantity metering chip; the first controllable switch is used for being in a conducting state or a disconnecting state according to a control signal output by the electric quantity metering chip; when the voltage of the electric core group is not in a preset voltage range, the first controllable switch is in an off state.
4. The apparatus of claim 1, further comprising: the first controllable switch is connected with the electric core group and the main loop and is connected with the electric quantity metering chip;
the device further comprises: the preheating circuit is arranged in the surrounding area of the electric core group and is connected with the electric quantity metering chip through a second controllable switch; the second controllable switch is used for being in a conducting state or a disconnecting state according to the control signal output by the electric quantity metering chip;
the device further comprises: the radiator is arranged in the surrounding area of the electric core group and is connected with the electric quantity metering chip through a third controllable switch; and the third controllable switch is used for being in a conducting or disconnecting state according to the control signal output by the electric quantity metering chip.
5. The apparatus of claim 1, further comprising:
the first controllable switch is connected with the electric core group and the main loop and is connected with the electric quantity metering chip; and when the current value of the main loop is not in a preset current range, the first controllable switch is in an off state.
6. The apparatus of claim 1, further comprising:
the fourth controllable switch is connected with the electric core group and the pre-charging circuit and is connected with the electric quantity metering chip; and the fourth controllable switch is used for being in a conducting state or a disconnecting state according to the control signal output by the electric quantity metering chip.
7. The apparatus of claim 1, further comprising:
the data port is connected with the electric quantity metering chip and the display; the electric quantity metering chip is specifically used for transmitting the battery state data to the display through the data port;
the display is used for displaying physical parameters of the cell group, and the physical parameters comprise: at least one of the electric quantity, the voltage value, the output current value and the temperature value of the electric core group.
8. The apparatus of claim 6, wherein the battery management metering module further comprises:
the key input panel is electrically connected with the electric quantity metering chip and used for receiving key information input by a user, and the key information comprises: disconnecting/connecting main loop information and disconnecting/connecting pre-charging circuit information; wherein:
the disconnection/connection main loop information is used for indicating the electric quantity metering chip to control the first controllable switch connecting the electric core group and the main loop to be in a disconnection or connection state; and the disconnection/connection pre-charging circuit information is used for indicating the electric quantity metering chip to control the fourth controllable switch for connecting the electric core group and the pre-charging circuit to be in a disconnection or connection state.
9. The apparatus of claim 1, wherein the battery management metering module further comprises:
the communication port is electrically connected with the electric quantity metering chip and is used for sending the physical parameters of the electric core group to a remote host and/or receiving a control instruction sent by the remote host to the electric quantity metering chip, wherein the physical parameters comprise: at least one of the electric quantity, the voltage value, the output current value and the temperature value of the electric core group.
10. The apparatus of claim 1, wherein the self-discharge circuit comprises: a fifth controllable switch, a first bias resistor and a discharge resistor; one end of the discharge resistor is connected with the anode of the electric core group, the other end of the discharge resistor is connected with the first end of a fifth controllable switch, and the control end of the fifth controllable switch is respectively connected with the first output port of the microprocessor and one end of the bias resistor; the second end of the fifth controllable switch and the other end of the first bias resistor are both grounded; a control end of the fifth controllable switch receives a control signal sent by a first output port of the microprocessor, so that the fifth controllable switch is in a conducting state or a disconnecting state;
the microprocessor controls the fifth controllable switch to be in a conducting state or a cut-off state through a switching signal of the first output port; when the fifth controllable switch is in a conducting state, the electric core group is connected with the self-discharging circuit so as to consume electric energy in the electric core group through the discharging resistor.
11. The apparatus of claim 10, the fifth controllable switch being a field effect transistor; the first end of the fifth controllable switch is a drain electrode of a field effect transistor, the source electrode of the second end of the fifth controllable switch is a source electrode of the field effect transistor, and the control end of the fifth controllable switch is a grid electrode of the field effect transistor.
12. The apparatus of claim 1, further comprising: the charge-discharge control circuit who is connected with microprocessor, charge-discharge control circuit includes: a sixth controllable switch, a seventh controllable switch, an eighth controllable switch, a second bias resistor, a third bias resistor, a fourth bias resistor, and a fifth bias resistor;
a first end of the sixth controllable switch is grounded through a fourth bias resistor and a fifth bias resistor, and the first end of the sixth controllable switch forms a positive connection port of an external charging circuit or an external discharging circuit; a second end of the sixth controllable switch is connected with one end of a second bias resistor and a second end of the seventh controllable switch respectively, a control end of the sixth controllable switch is connected with a first end of the eighth controllable switch, and the other end of the second bias resistor is connected with a first end of the eighth controllable switch; the control end of the seventh controllable switch is connected with the first end of the eighth controllable switch, and the second end of the seventh controllable switch is connected with the anode of the electric core group; the second end of the eighth controllable switch is grounded, and the control end of the eighth controllable switch is connected with the second output port of the microprocessor and grounded through a third bias resistor;
the microprocessor controls the eighth controllable switch to be in a conducting state or a cut-off state through a switching signal of the second output port; when the eighth controllable switch is in a conducting state, the sixth controllable switch and the seventh controllable switch are in a conducting state, and the electric core group is communicated with the external charging circuit; or the external discharge circuit is communicated;
the microprocessor is specifically configured to:
and switching the eighth controllable switch to be in a conducting state or a stopping state according to the electric quantity value of the electric core group, and when the eighth controllable switch is in the conducting state, the electric core group is communicated with an external charging circuit.
13. The apparatus of claim 12, wherein the sixth, seventh, and eighth controllable switches comprise: any one of field effect transistor, power switch tube, thyristor and relay.
14. The utility model provides an unmanned aerial vehicle, includes two cluster above electric core groups, its characterized in that still includes: the battery management device of any of claims 1-13, wherein the battery management device is configured to perform management of the set of battery cells.
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| CN201820403045.7U CN211556878U (en) | 2018-03-23 | 2018-03-23 | Battery management device and unmanned aerial vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462233A (en) * | 2018-03-23 | 2018-08-28 | 深圳市道通智能航空技术有限公司 | Cell managing device and unmanned plane |
| CN112848967A (en) * | 2020-12-25 | 2021-05-28 | 芜湖翼讯飞行智能装备有限公司 | Unmanned aerial vehicle battery management system capable of improving comprehensive utilization rate |
| CN113859552A (en) * | 2021-09-27 | 2021-12-31 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
-
2018
- 2018-03-23 CN CN201820403045.7U patent/CN211556878U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462233A (en) * | 2018-03-23 | 2018-08-28 | 深圳市道通智能航空技术有限公司 | Cell managing device and unmanned plane |
| CN112848967A (en) * | 2020-12-25 | 2021-05-28 | 芜湖翼讯飞行智能装备有限公司 | Unmanned aerial vehicle battery management system capable of improving comprehensive utilization rate |
| CN112848967B (en) * | 2020-12-25 | 2022-08-19 | 芜湖翼讯飞行智能装备有限公司 | Unmanned aerial vehicle battery management system capable of improving comprehensive utilization rate |
| CN113859552A (en) * | 2021-09-27 | 2021-12-31 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
| CN113859552B (en) * | 2021-09-27 | 2023-10-24 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
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Address after: 518055 Shenzhen, Guangdong, Nanshan District Xili street, No. 1001, Zhiyuan Road, B1 9. Patentee after: Shenzhen daotong intelligent Aviation Technology Co.,Ltd. Address before: 518055 Shenzhen, Guangdong, Nanshan District Xili street, No. 1001, Zhiyuan Road, B1 9. Patentee before: AUTEL ROBOTICS Co.,Ltd. |