CN109478789A - A kind of charging circuit and device - Google Patents
A kind of charging circuit and device Download PDFInfo
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- CN109478789A CN109478789A CN201680011494.0A CN201680011494A CN109478789A CN 109478789 A CN109478789 A CN 109478789A CN 201680011494 A CN201680011494 A CN 201680011494A CN 109478789 A CN109478789 A CN 109478789A
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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
Abstract
A kind of charging circuit (10) and device.Wherein, the charging circuit (10) includes: detection circuit module (101); for detecting the both end voltage of each battery of battery pack (14); when detection circuit module (101) detects that the both end voltage of battery is persistently greater than first voltage protection threshold value in predetermined time delay, first control signal is exported；On-off circuit module (102), and detection circuit module (101) connection, on-off circuit module (102) are used to switch according to first control signal charging circuit (10) to stopping charged state.Therefore; when occurring charging unusual condition when charging circuit (10) is in charging; charging circuit (10) is able to enter stopping charged state; it avoids causing charging circuit (10) or battery pack (14) accident occur because continuing charging, to protect battery pack (14) and protection charging circuit (10).
Description
The present invention relates to charging technique fields, more particularly to a kind of charging circuit and device.
The one kind of lithium battery as power supply usage mode, due to the energy height of lithium battery and light-weight, lithium battery is increasingly used.For the battery management system (BATTERY MANAGEMENT SYSTEM, BMS) being made of multisection lithium battery, so that battery management system is effectively protected is an important technical task.
In in some application fields, lithium battery group is arranged in battery pack, and external power supply charges to lithium battery group by charger.In the implementation of the present invention, discovery the relevant technologies have the following problems inventor: since the charging environment of battery pack is poor, during the charging process, the charging circuit of battery pack is easy to appear failure or causes some charging accidents, and it is unreliable to cause to charge.
Summary of the invention
The embodiment of the present invention provides a kind of charging circuit and device, and which solve the prior arts to charge insecure technical problem there are battery pack.
In order to solve the above technical problems, the present invention the following technical schemes are provided:
In first aspect; the embodiment of the present invention discloses a kind of charging circuit; for connecting power supply and controlling the charging of battery pack; the charging circuit includes: detection circuit module; for detecting the both end voltage of each battery of the battery pack; when the detection circuit module detects that the both end voltage of the battery is persistently greater than first voltage protection threshold value in predetermined time delay, first control signal is exported；On-off circuit module is connected with the detection circuit module, and the on-off circuit module is used to switch according to the first control signal charging circuit to stopping charged state.
Optionally, the on-off circuit module includes first switch circuit, the first switch circuit includes first input end, the first output end and the first control terminal, the first input end is connected with the power supply, first output end is connected with the battery pack, and first control terminal is connected with the detection circuit module；Institute
It states first switch circuit and is specifically used for switching according to the first control signal charging circuit to stopping charged state.
Optionally, the on-off circuit module further includes second switch circuit；The second switch circuit includes the second input terminal, second output terminal and the second control terminal, and second input terminal is connected with first output end, and the second output terminal is connected with the battery pack；The charging circuit further includes protection circuit module, is connect respectively with each battery of second control terminal and the battery pack, the both end voltage of each battery for detecting the battery pack；Threshold value is protected when the both end voltage of the battery is greater than second voltage, the protection circuit module exports second control signal, so that the charging circuit is switched to stopping charged state by the second switch circuit.
Optionally, the charging circuit further includes several third switching circuits corresponding with the quantity of the battery of the battery pack, the one third switching circuit includes third input terminal, third output end and third control terminal, one battery and a third input terminal connection, the one third output end is connect with another third switching circuit and another battery respectively, and a third control terminal is connected with the detection circuit module；It is less than default balanced end voltage when the both end voltage of the highest battery of voltage is greater than default balanced starting voltage, and the pressure difference that the both end voltage of the highest battery of voltage subtracts the both end voltage of the minimum battery of voltage is greater than default balanced switch DP, the detection circuit module output third controls signal, and it is in the conductive state to control third switching circuit corresponding to the highest battery of the voltage.
Optionally, the protection circuit module is connected by communication interface with the detection circuit module, and the information of voltage of each battery of the battery pack is transmitted to the detection circuit module.
Optionally, the charging circuit further includes radiating module, is connected with the detection circuit module；When exporting the third control signal, the detection circuit module starts the radiating module.
Optionally, when the detection circuit module detects the remaining capacity of the battery lower than pre-set low pressure equalization discharge threshold value, and the battery continues not meeting fully charged state within the scope of preset times and/or completely puts state, and the detection circuit module controls third switching circuit corresponding to each battery of the battery pack and is on state.
Optionally, when the third switching circuit corresponding to each battery for controlling the battery pack is on state, the detection circuit module starts the radiating module.
In second aspect, the embodiment of the present invention provides a kind of charging unit, and the charging unit includes: charging circuit, for connecting power supply and controlling the charging of battery pack；Battery pack, the battery pack are set to inside battery pack；Balanced box is connected with the battery pack；Wherein, the charging circuit includes: detection circuit module, the both end voltage of each battery for detecting the battery pack, when the detection circuit module detects
When the both end voltage of the battery is persistently greater than first voltage protection threshold value in predetermined time delay, first control signal is exported；On-off circuit module is connected with the detection circuit module, and the on-off circuit module is used to switch according to the first control signal charging circuit to stopping charged state.
Optionally, the detection circuit module is set to inside the battery pack.
Optionally, the detection circuit module is set to inside the balanced box.
Optionally, the on-off circuit module includes the first switch circuit being set to inside the balanced box, the first switch circuit includes first input end, the first output end and the first control terminal, the first input end is connected with the power supply, first output end is connected with the battery pack, and first control terminal is connected with the detection circuit module；The first switch circuit is specifically used for switching according to the first control signal charging circuit to stopping charged state.
Optionally, the on-off circuit module further includes the second switch circuit being set to inside the battery pack；The second switch circuit includes the second input terminal, second output terminal and the second control terminal, and second input terminal is connected with first output end, and the second output terminal is connected with the battery pack；The charging circuit further includes protection circuit module, connect with second control terminal and each battery of the battery pack connects, the both end voltage of each battery for detecting the battery pack；Threshold value is protected when the both end voltage of the battery is greater than second voltage, the protection circuit module exports second control signal, so that the charging circuit is switched to stopping charged state by the second switch circuit.
Optionally, the charging circuit further includes several third switching circuits corresponding with the quantity of the battery of the battery pack, and the third switching circuit is set to inside the balanced box；The one third switching circuit includes third input terminal, third output end and third control terminal, one battery and a third input terminal connection, the one third output end is connect with another third switching circuit and another battery respectively, and a third control terminal is connected with the detection circuit module；It is less than default balanced end voltage when the both end voltage of the highest battery of voltage is greater than default balanced starting voltage, and the pressure difference that the both end voltage of the highest battery of voltage subtracts the both end voltage of the minimum battery of voltage is greater than default balanced switch DP, the detection circuit module output third controls signal, and it is in the conductive state to control third switching circuit corresponding to the highest battery of the voltage.
Optionally, the protection circuit module is connected by communication interface with the detection circuit module, and the information of voltage of each battery of the battery pack is transmitted to the detection circuit module.
Optionally, the charging circuit further includes the radiating module being set to inside the balanced box, is connected with the detection circuit module；When exporting the third control signal, the detection circuit module starts the radiating module.
Optionally, when the detection circuit module detects the remaining capacity of the battery lower than pre-set low pressure equalization discharge threshold value, and the battery continues not meeting fully charged state within the scope of preset times and/or completely puts state, and the detection circuit module controls third switching circuit corresponding to each battery of the battery pack and is on state.
Optionally, when the third switching circuit corresponding to each battery for controlling the battery pack is on state, the detection circuit module starts the radiating module.
Optionally, the charging circuit further includes power module and the 4th switching circuit；4th switching circuit includes the 4th input terminal, the 4th output end and the 4th control terminal, the power module is connect with the radiating module and the 4th input terminal respectively, 4th output end is connected with the first input end, and the 4th control terminal is connected with the detection circuit module；When the battery pack and the balanced box disconnect, the 4th control signal of detection circuit module output, to disconnect the output of the power module.
In each embodiment of the present invention; detection circuit module is when the both end voltage for the battery for detecting battery pack is persistently greater than first voltage protection threshold value in predetermined time delay; export first control signal; on-off circuit module switches charging circuit according to first control signal and is in stopping charged state; therefore; when occurring charging unusual condition when charging circuit is in charging; charging circuit is able to enter stopping charged state; it avoids causing charging circuit or battery pack accident occur because continuing charging, to protect battery pack and protection charging circuit.
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be briefly described below to attached drawing needed in the embodiment of the present invention.It should be evident that drawings described below is only some embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of charging circuit；
Fig. 2 is that the embodiment of the present invention provides the schematic block circuit diagram of another charging circuit；
Fig. 3 is that the embodiment of the present invention provides the schematic block circuit diagram of another charging circuit；
Fig. 4 is that the embodiment of the present invention provides a kind of electrical block diagram of charging circuit；
Fig. 4 a is that the embodiment of the present invention provides a kind of electrical block diagram of radiating module；
Fig. 5 is that the embodiment of the present invention provides the electrical block diagram of another charging circuit；
Fig. 6 is that the embodiment of the present invention provides a kind of structural schematic diagram of charging unit；
Fig. 7 is that the embodiment of the present invention provides the structural schematic diagram of another charging unit.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
Fig. 1 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of charging circuit.As shown in Figure 1, the charging circuit 10 is connect with power supply 12 and battery pack 14 respectively, charging circuit 10 receives the electric current that power supply 12 provides, and each battery of respectively battery pack 14 charges.During the charging process, charging circuit 10 according to the charging of each battery of preset charged logic control battery pack 14, can control the charging of each battery and at least include: balanced each battery and prevent each battery from over-voltage, under-voltage, overcurrent and Underflow Status occur.
Referring again to Fig. 1.Charging circuit 10 includes detection circuit module 101 and on-off circuit module 102, wherein detection circuit module 101 is connect with on-off circuit module 102 and battery pack 14 respectively, and on-off circuit module 102 is connect with battery pack 14 and power supply 12 respectively.Detection circuit module 101 can detecte the both end voltage of each battery of battery pack 14.When detection circuit module 101 detects the both end voltage of battery greater than first voltage protection threshold value; start to call delay procedure or enters delay circuit; further; threshold value is protected when the both end voltage of battery is persistently greater than first voltage in predetermined time delay; first control signal is exported, on-off circuit module 102 switches charging circuit to stopping charged state according to first control signal.Predetermined time delay herein is generated by delay procedure or delay circuit, or delay circuit generates with delay procedure, predetermined time delay is generated as by software approach generation predetermined time delay or by hardware circuit, the content that those skilled in the art is instructed and guided according to embodiment, in conjunction with the prior art, the purpose of the embodiment of the present invention may be implemented.The numerical value of predetermined time delay herein can be decided in its sole discretion by designer according to business demand, for example, designer can choose suitable crystal oscillator when detection circuit module 101 is microprocessor, suitable delay procedure is write, to realize the setting of predetermined time delay.In another example designer can complete the setting of predetermined time delay when the setting for having delay circuit to realize predetermined time delay with the logic gates of appropriate mix.By setting predetermined time delay, detection circuit module 101 can be made more accurately to judge the voltage status of the both end voltage of present battery, in order to avoid erroneous judgement.Designer can also protect threshold value according to the type sets itself first voltage of the battery of battery pack.
Battery pack 14 includes the battery that multiple positive and negative anodes mutually concatenate, and detection circuit module 101 is connect with the positive and negative anodes of each battery respectively.Detection circuit module 101 in the both end voltage of each battery for collecting battery pack 14, conditioning collected each battery both end voltage, and according to logic of propositions, by each battery
Both end voltage and first voltage protection threshold value be compared; in comparison procedure; detection circuit module 101 can choose the voltage of the highest battery of both end voltage and first voltage protection threshold value in battery pack 14 and be compared; certainly; detection circuit module 101 is it is also an option that both end voltage and first voltage the protection threshold value of other batteries are compared in battery pack 14; when detection circuit module 101 detects that the both end voltage of battery is persistently greater than first voltage protection threshold value in predetermined time delay, first control signal is exported.
Detection circuit module 101 includes controller and signal conditioning circuit; controller acquires the both end voltage of each battery of battery pack 14 according to logic of propositions; and after signal conditioning circuit processing; to treated, each signal is analyzed; when the both end voltage for meeting battery is persistently greater than the condition of first voltage protection threshold value in predetermined time delay, first control signal is exported.Signal conditioning circuit herein include signal filter circuit, squelch circuit, amplifying circuit, analog to digital conversion circuit, D/A converting circuit and etc..Controller can be by any combination of general processor, digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware component or these components.In addition, controller herein can be any conventional processors, microprocessor, microcontroller or state machine.Processor also may be implemented as calculating the combination of equipment, for example, the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors combination DSP core or any other this configuration.
Switching circuit that is that on-off circuit module 102 can be made of electronic switching tube and other discrete components and being controlled by electric signal, or can also be the electromagnetic switch controlled by electric signal.For example, the switching circuit that on-off circuit module 102 can be made of triode and resistance, or can also be relay etc..
In the present embodiment, when occurring charging unusual condition when charging circuit 10 is in charging, charging circuit 10 is able to enter stopping charged state, avoids causing charging circuit or battery pack accident occur because continuing charging, to protect battery pack and protection charging circuit.
As shown in Figure 2, on-off circuit module 102 includes first switch circuit 1021, first switch circuit 1021 includes first input end 10A, the first output end 10B and the first control terminal 10C, first input end 10A and power supply 12 connect, first output end 10B and battery pack 14 connect, and the first control terminal 10C and detection circuit module 101 connect.When detection circuit module 101 detects that the both end voltage of battery is persistently greater than first voltage protection threshold value in predetermined time delay; first control signal is exported to first switch circuit 1021 by the first control terminal 10C; first switch circuit 1021 is according to first control signal; the charge circuit cut off the power between 12 and battery pack 14, so that charging circuit 10 is switched to stopping charged state.The switching circuit that on-off circuit module 102 can be made of triode and resistance, in normal charging condition, triode is in and leads
Logical state, after first switch circuit 1021 receives first control signal, triode is in off state, so that charging circuit 10 is switched to stopping charged state.
As shown in Figure 3, on-off circuit module 102 further includes second switch circuit 1022, second switch circuit 1022 includes the second input terminal 20A, second output terminal 20B and the second control terminal 20C, the second input terminal 20A and the first output end 10A connection, and second output terminal 20B and battery pack 14 connect.First switch circuit 1021 and/or switching circuit that is that second switch circuit 1022 can be made of electronic switching tube and other discrete components and being controlled by electric signal, or can also be the electromagnetic switch controlled by electric signal.
Further, as shown in figure 3, charging circuit 10 further includes protection circuit module 103, protection circuit module 103 is connect with each battery of the second control terminal 20C and battery pack 14 respectively.
In the actual operation process, when each battery of the charging circuit to battery pack charges, since charging environment is more complicated, for protecting the switching circuit of battery pack charging safety often to face out of control danger.Circuit module 103 is protected to detect the both end voltage of each battery of battery pack 14; threshold value is protected when the both end voltage of battery is greater than second voltage; circuit module 103 is protected to export second control signal to the second control terminal 20C of second switch circuit 1022, charging circuit 10 is switched to stopping charged state by second switch circuit 1022.But; second switch circuit 1022 often faces out of control danger; in order to improve the reliability that control overcharges; the on-off circuit module 102 of the charging circuit 10 of the present embodiment also sets up first switch circuit 1021; charging circuit 10 can be switched to stopping charged state according to first control signal by it; to realize further protection charging circuit; charging reliability is provided; it avoids once protecting circuit malfunction bring security risk; using such circuit design, a possibility that second class protection all fails can also be greatly reduced.
First voltage protection threshold value herein is greater than second voltage and protects threshold value.Therefore, when charging circuit occurs abnormal, second switch circuit 1022 enters the state of " switch to charging circuit 10 and stop charged state " relative to first switch circuit 1021 at first.After the control failure of second switch circuit 1022, the voltage of charge circuit is gradually risen, and first switch circuit 1021 initially enters the state of " switch to charging circuit 10 and stop charged state " at this time.
Fig. 4 is that the embodiment of the present invention provides a kind of electrical block diagram of charging circuit.As shown in Figure 4; first switch circuit 1021 is the first electronic switching tube 1021, and second switch circuit 1022 is the second electronic switching tube 1022, and detection circuit module 101 is microprocessor 101; protection circuit module 103 is charge protection chip 103, and battery pack 14 includes four batteries.Wherein, the first input end 10A and power supply 12 (or charger 12) of first electronic switching tube 1021 are connected, the second input terminal 20A connection of first output end 10B and the second electronic switching tube 1022, first control terminal 10C is connected with the first pin 1A of microprocessor 101, the anode connection of the second pin 2A of microprocessor 101 and the first battery 141, third pin 3A and second
The anode connection of the anode connection of the anode connection of battery 142, the 4th pin 4A and third battery 143, the 5th pin 5A and the 4th battery 144, the 6th pin 6A ground connection.The anode connection of the second output terminal 20B of second electronic switching tube 1022 and the first battery 141.
Further; the second control terminal 20C connection of the first pin 1B and the second electronic switching tube 1022 of charge protection chip 103; the anode connection of second pin 2B and the first battery 141; the anode connection of third pin 3B and the second battery 142; the anode connection of 4th pin 4B and third battery 143; the anode connection of 5th pin 5B and the 4th battery 144, the 6th pin 6B ground connection.
Charge protection chip 103 acquires the both end voltage of each battery by second pin 2B respectively to the 5th pin 5B; simultaneously; microprocessor 101 acquires the both end voltage of each battery by second pin 2A respectively to the 5th pin 5A; wherein, the voltage of 141 to the 4th battery 144 of the first battery is respectively V1, V2, V3 and V4.When charge protection chip 103 detects the both end voltage of battery greater than second voltage protection threshold value; charge protection chip 103 sends second control signal to the second electronic switching tube 1022, and charging circuit 10 is switched to stopping charged state by the second electronic switching tube 1022.When the second electronic switching tube 1022 fails without the control by charge protection chip 103; or charge protection chip 103 occur it is abnormal when not can control the second electronic switching tube 1022; when microprocessor 101 detects that the both end voltage of battery is persistently greater than first voltage protection threshold value in predetermined time delay; first control signal is sent to the first electronic switching tube 1021; first electronic switching tube 1021 is according to first control signal; the charge circuit cut off the power between 12 and battery pack 14, so that charging circuit 10 is switched to stopping charged state.
It refer again to Fig. 4.Optionally, charging circuit 10 further includes several third switching circuits 104 corresponding with the quantity of the battery of battery pack 14.For example, in the present embodiment, since battery pack 14 includes four batteries, charging circuit 10 includes four third switching circuits 104.One third switching circuit 104 includes third input terminal 30A, third output end 30B and third control terminal 30C, one battery and a third input terminal 30A connection, one third output end 30B is connect with another third switching circuit 104 and another battery respectively, and a third control terminal 30C and detection circuit module 101 connect.Detection circuit module 101 is connected with each battery of battery pack 14, detects the both end voltage of each battery of battery pack 14.Detection circuit module herein is microprocessor.
It is less than default balanced end voltage when the both end voltage of the highest battery of voltage is greater than default balanced starting voltage, and the pressure difference that the both end voltage of the highest battery of voltage subtracts the both end voltage of the minimum battery of voltage is greater than default balanced switch DP, detection circuit module 101 (microprocessor) exports third and controls signal, it is in the conductive state to control third switching circuit corresponding to the highest battery of voltage, to realize the equilibrium of each battery.
Herein, designer can set default balanced starting voltage, default balanced end voltage and default balanced switch DP according to battery types with operation purpose.For example, can choose default balanced starting voltage is 3.6V, presetting equilibrium end voltage is 4.15V, and presetting equilibrium switch DP is 20mV.As shown in Figure 4, detection circuit module 101 (microprocessor) detects each batteries, find out the battery of ceiling voltage VELL (max) and minimum voltage VELL (min), when ceiling voltage VELL (max) meets condition: default balanced starting voltage≤VELL (max)≤balanced end voltage, also, VELL (max)-VELL (min) >=default balanced switch DP.It is in the conductive state that detection circuit module 101 controls third switching circuit corresponding to the battery of ceiling voltage.For example, the third switching circuit of control first is in the conductive state, to realize equilibrium as shown in figure 4, the both end voltage highest of the first battery 141, detection circuit module 101 export third and control signal.
In the present embodiment, in order to improve euqalizing current, charging circuit 10 also will start radiating module and radiate to charging circuit while the both end voltage of balanced each battery.Therefore, optionally, as shown in fig. 4 a, charging circuit 10 further includes radiating module 105, and radiating module 105 and microprocessor 101 connect.Microprocessor 101 when exporting third control signal by the 11st pin 11A, is closed switch 105A, to start radiator during equilibrium.Relative to traditional passive equalization scheme, since it is by the way of bypass resistance power consumption in parallel, if euqalizing current is too big, have calorific value big, heat can not discharge, and cause equalizing circuit temperature that can sharply increase, to burn out circuit, there is security risk.Therefore, passive euqalizing current generally can only be within 100mA, and for the battery pack bigger for capacity, proportionality action is just very small, and effect should be had by not having.And in the present embodiment, radiating module is arranged in charging circuit in the present embodiment, can be improved the euqalizing current of passive equilibrium, to significantly more efficient each batteries of equilibrium, also, 5-10 times or more of electric current can be improved than traditional approach for euqalizing current herein, keep counterbalance effect more significant.
In order to improve charging reliability, when detection circuit module 101 detects the remaining capacity of battery lower than pre-set low pressure equalization discharge threshold value, and battery continues not meeting fully charged state within the scope of preset times and/or completely puts state, third switching circuit corresponding to each battery of detection circuit module control battery pack is on state, the electricity of all batteries is vented, to realize the correction of electricity and battery balanced.It refer again to Fig. 4.As remaining capacity SOC (the State of Charge of battery, SOC) it is lower than pre-set low pressure equalization discharge threshold value (SOC=15%), and does not continuously meet fully charged state at 3 times and/or completely put state, microprocessor is controlled third switching circuit corresponding to each battery of battery pack by the 7th pin 7A to the tenth pin 10A and is on state, the electricity of all batteries is vented, to realize the correction of electricity and battery balanced.
Further, control battery pack 14 each battery corresponding to third switching circuit be on state when, microprocessor 101 by the 11st pin 11A start radiating module, with the process to electric discharge into
Row heat dissipation.
In the present embodiment, the mode being vented by using low battery, using battery discharge curve, in emptying, voltage curve is steeper, is easy the principle of correction residual capacity, achievees the effect that balanced residual capacity.
Other than the frame mode of charging circuit as shown in Figure 4, as the another aspect of the present embodiment, the present embodiment also provides the structural schematic diagram of another charging circuit.As shown in figure 5, the difference of the charging circuit and charging circuit shown in Fig. 4 is: protection circuit module 103 is connected by communication interface and detection circuit module 101, and the information of voltage of each battery of battery pack 14 is transmitted to detection circuit module 101.As shown in figure 5, protection circuit module 103 herein is charge protection chip 103, detection circuit module 101 is microprocessor 101.Charge protection chip 103 is connected by serial ports and microprocessor 101, and collected information of voltage is transferred to microprocessor 101 by acquiring the both end voltage of each battery of battery pack 14 by charge protection chip 103.
Those skilled in the art should understand that: the both end voltage acquisition mode of the battery of battery pack shown in embodiment, the driving method of radiating module, the control mode of balanced way and switching circuit are one exemplary; anyone content instructed and guided according to the present embodiment; in conjunction with the prior art; any improvement or replacement made by the present embodiment, should all fall under the scope of the present invention.
Fig. 6 is that the embodiment of the present invention provides a kind of structural schematic diagram of charging unit.As shown in fig. 6, the charging unit 60 includes battery pack 601, balanced box 602 and charging circuit 10 as shown in Figures 1 to 5, balanced box 602 and battery pack 601 are connected, and battery pack 14 is set to inside battery pack 601.
In some embodiments; as shown in Figure 4; detection circuit module 101 and protection circuit module 103 are set to inside battery pack 601; first switch circuit 1021 is set to inside balanced box 602; second switch circuit 1022 is set to inside battery pack; each third switching circuit 104 is set to inside balanced box 602, and radiating module 105 is set to inside balanced box 602.
As the another aspect of the embodiment of the present invention, in addition to the positional relationship of each circuit module as shown in Figure 4, there is also the positional relationships of each circuit module as shown in Figure 5.As shown in Figure 5; detection circuit module 101 is set to inside balanced box 602; protection circuit module 103 is set to inside battery pack 601; first switch circuit 1021 is set to inside balanced box 602; second switch circuit 1022 is set to inside battery pack 601; each third switching circuit 104 is set to inside balanced box 602, and radiating module 105 is set to inside balanced box 602.
As the another aspect of the embodiment of the present invention, in addition to the positional relationship of each circuit module of such as Fig. 4 or shown in fig. 5, there is also the positional relationships of each circuit module as shown in Figure 7.The difference of charging circuit and Fig. 4 shown in Fig. 7 is: detection circuit module 101 is set to inside balanced box 602.
In some embodiments, as shown in Fig. 4 or 5 or 7, charging circuit 10 further includes power module 106 and the 4th switching circuit 107.4th switching circuit 107 includes the 4th input terminal 40A, the 4th output end 40B and the 4th control terminal 40C, power module 106 is connect with radiating module 105 and the 4th input terminal 40A respectively, 4th output end 40B is connected with first input end 10A, and the 4th control terminal 40C is connected with the 12nd pin 12A of microprocessor 101.When battery pack 601 and balanced box 602 disconnect, the 4th control signal of the output of detection circuit module 101, to disconnect the output of power module 106.When balanced box 602 is combined with charger 12 as assembly, in order to reduce the quiescent dissipation of charging unit, when balanced box 602 is disconnected with battery pack 601, microprocessor 101 passes through the 4th control signal of the 12nd pin 12A output, the power supply for disconnecting power module 106, to reduce the power consumption of charging unit.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Under thinking of the invention, it can also be combined between technical characteristic in above embodiments or different embodiments, step can be realized with random order, and there are many other variations of different aspect present invention as described above, for simplicity, they are not provided in details；Although the present invention is described in detail referring to the foregoing embodiments, those skilled in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And these are modified or replaceed, the range of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (19)
- A kind of charging circuit, for connecting power supply and controlling the charging of battery pack characterized by comprisingDetection circuit module, the both end voltage of each battery for detecting the battery pack export first control signal when the detection circuit module detects that the both end voltage of the battery is persistently greater than first voltage protection threshold value in predetermined time delay；On-off circuit module is connected with the detection circuit module, and the on-off circuit module is used to switch according to the first control signal charging circuit to stopping charged state.
- Charging circuit according to claim 1, which is characterized in thatThe on-off circuit module includes first switch circuit, the first switch circuit includes first input end, the first output end and the first control terminal, the first input end is connected with the power supply, first output end is connected with the battery pack, and first control terminal is connected with the detection circuit module；The first switch circuit is specifically used for switching according to the first control signal charging circuit to stopping charged state.
- Charging circuit according to claim 2, which is characterized in that the on-off circuit module further includes second switch circuit；The second switch circuit includes the second input terminal, second output terminal and the second control terminal, and second input terminal is connected with first output end, and the second output terminal is connected with the battery pack；The charging circuit further includes protection circuit module, is connect respectively with each battery of second control terminal and the battery pack, the both end voltage of each battery for detecting the battery pack；Threshold value is protected when the both end voltage of the battery is greater than second voltage, the protection circuit module exports second control signal, so that the charging circuit is switched to stopping charged state by the second switch circuit.
- Charging circuit according to claim 3, it is characterized in that, the charging circuit further includes several third switching circuits corresponding with the quantity of the battery of the battery pack, the one third switching circuit includes third input terminal, third output end and third control terminal, one battery and a third input terminal connection, the one third output end is connect with another third switching circuit and another battery respectively, and a third control terminal is connected with the detection circuit module；It is less than default balanced end voltage when the both end voltage of the highest battery of voltage in the battery pack is greater than default balanced starting voltage, and the pressure difference that the both end voltage of the highest battery of voltage subtracts the both end voltage of the minimum battery of voltage is greater than default balanced switch DP, the detection circuit module output third controls signal, and it is in the conductive state to control third switching circuit corresponding to the highest battery of the voltage.
- Charging circuit according to claim 3, which is characterized in that the protection circuit module is connected by communication interface with the detection circuit module, and the information of voltage of each battery of the battery pack is transmitted to the detection circuit module.
- Charging circuit according to claim 4 or 5, which is characterized in that the charging circuit further includes radiating module, is connected with the detection circuit module；When exporting the third control signal, the detection circuit module starts the radiating module.
- Charging circuit according to claim 4 or 5, it is characterized in that, when the detection circuit module detects the remaining capacity of the battery lower than pre-set low pressure equalization discharge threshold value, and the battery continues not meeting fully charged state within the scope of preset times and/or completely puts state, and the detection circuit module controls third switching circuit corresponding to each battery of the battery pack and is on state.
- Charging circuit according to claim 7, which is characterized in that when the third switching circuit corresponding to each battery for controlling the battery pack is on state, the detection circuit module starts the radiating module.
- A kind of charging unit characterized by comprisingCharging circuit, for connecting power supply and controlling the charging of battery pack；Battery pack, the battery pack are set to inside battery pack；Balanced box is connected with the battery pack；Wherein, the charging circuit includes:Detection circuit module, the both end voltage of each battery for detecting the battery pack export first control signal when the detection circuit module detects that the both end voltage of the battery is persistently greater than first voltage protection threshold value in predetermined time delay；On-off circuit module is connected with the detection circuit module, and the on-off circuit module is used to switch according to the first control signal charging circuit to stopping charged state.
- Charging unit according to claim 9, which is characterized in that the detection circuit module is set to inside the battery pack.
- Charging unit according to claim 9, which is characterized in that the detection circuit module is set to inside the balanced box.
- Charging unit described in 0 or 11 according to claim 1, it is characterized in that, the on-off circuit module includes the first switch circuit being set to inside the balanced box, the first switch circuit includes first input end, the first output end and the first control terminal, the first input end is connected with the power supply, first output end is connected with the battery pack, and first control terminal is connected with the detection circuit module；It is described First switch circuit is specifically used for switching according to the first control signal charging circuit to stopping charged state.
- Charging unit according to claim 12, which is characterized in that the on-off circuit module further includes the second switch circuit being set to inside the battery pack；The second switch circuit includes the second input terminal, second output terminal and the second control terminal, and second input terminal is connected with first output end, and the second output terminal is connected with the battery pack；The charging circuit further includes protection circuit module, connect with second control terminal and each battery of the battery pack connects, the both end voltage of each battery for detecting the battery pack；Threshold value is protected when the both end voltage of the battery is greater than second voltage, the protection circuit module exports second control signal, so that the charging circuit is switched to stopping charged state by the second switch circuit.
- Charging circuit according to claim 13, which is characterized in that the charging circuit further includes several third switching circuits corresponding with the quantity of the battery of the battery pack, and the third switching circuit is set to inside the balanced box；The one third switching circuit includes third input terminal, third output end and third control terminal, one battery and a third input terminal connection, the one third output end is connect with another third switching circuit and another battery respectively, and a third control terminal is connected with the detection circuit module；It is less than default balanced end voltage when the both end voltage of the highest battery of voltage is greater than default balanced starting voltage, and the pressure difference that the both end voltage of the highest battery of voltage subtracts the both end voltage of the minimum battery of voltage is greater than default balanced switch DP, the detection circuit module output third controls signal, and it is in the conductive state to control third switching circuit corresponding to the highest battery of the voltage.
- Charging unit according to claim 13, which is characterized in that the protection circuit module is connected by communication interface with the detection circuit module, and the information of voltage of each battery of the battery pack is transmitted to the detection circuit module.
- Charging unit according to claim 14 or 15, which is characterized in that the charging circuit further includes the radiating module being set to inside the balanced box, is connected with the detection circuit module；When exporting the third control signal, the detection circuit module starts the radiating module.
- Charging unit according to claim 16, it is characterized in that, when the detection circuit module detects the remaining capacity of the battery lower than pre-set low pressure equalization discharge threshold value, and the battery continues not meeting fully charged state within the scope of preset times and/or completely puts state, and the detection circuit module controls third switching circuit corresponding to each battery of the battery pack and is on state.
- Charging unit according to claim 17, which is characterized in that controlling the battery pack When third switching circuit corresponding to each battery is on state, the detection circuit module starts the radiating module.
- Charging unit according to claim 18, which is characterized in that the charging circuit further includes power module and the 4th switching circuit；4th switching circuit includes the 4th input terminal, the 4th output end and the 4th control terminal,The power module is connect with the radiating module and the 4th input terminal respectively, and the 4th output end is connected with the first input end, and the 4th control terminal is connected with the detection circuit module；When the battery pack and the balanced box disconnect, the 4th control signal of detection circuit module output, to disconnect the output of the power module.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/102025 WO2018068270A1 (en) | 2016-10-13 | 2016-10-13 | Charging circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109478789A true CN109478789A (en) | 2019-03-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680011494.0A Pending CN109478789A (en) | 2016-10-13 | 2016-10-13 | A kind of charging circuit and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109478789A (en) |
| WO (1) | WO2018068270A1 (en) |
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| Publication number | Publication date |
|---|---|
| WO2018068270A1 (en) | 2018-04-19 |
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Application publication date: 20190315 |