CN203632319U - Lithium battery charging/discharging management system - Google Patents
Lithium battery charging/discharging management system Download PDFInfo
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Abstract
The utility model discloses a lithium battery charging/discharging management system which comprises the components of: a first switch, a first switch driving module, a charging module, a lithium battery monitoring unit, a current detecting module, a total voltage detecting module, a microcontroller, a lithium battery pack, a second switch driving module, a second switch and a power supply module. The microcontroller is connected with the lithium battery monitoring unit, the current detecting module, the total voltage detecting module, the first switch driving module, the charging module and the second switch driving module. The microcontroller receives signals which are transmitted by the lithium battery monitoring unit, the current detecting module and the total voltage detecting module and performs analysis processing on the signals. Simultaneously the microcontroller transmits the processed control signal to the first switch driving module, the charging module and the second switch driving module, thereby performing controlling management on charging/discharging of the lithium battery. The lithium battery charging/discharging management system prevents overcharging, over-discharging, overhigh temperature, over-current, etc. of a vehicle-mounted battery through detecting voltage, current and temperature of the battery pack in real time, thereby minimizing potential safety hazard in use of the battery.
Description
Technical field
The utility model relates to the management system field of the automobile-used electrokinetic cell system of a kind of electrical salf-walking, is specifically related to a kind of charging and discharging lithium battery management system.
Background technology
Along with the raising gradually of lithium battery performance, it is very extensive that it is applied to electric automobile, hybrid vehicle as electrical source of power.General electrical source of power all needs higher voltage, and several joints even tens joints just can be used as electrokinetic cell use.In the situation that multiple batteries series connection is used, bulk properties based on every joint single lithium battery inconsistent, can affect the power supply capacity of whole system, the words that one joint cell performance changes, such as occurring that voltage overcharges, voltage is crossed and put, charging and discharging currents is excessive or even the phenomenon such as short circuit, performance that can the whole Battery pack of impact, causes whole Battery pack to shorten or infringement useful life, even can catch fire, the hazard event such as blast when serious.For making lithium battery group can farthest bring into play its superior function, guarantee the fail safe of its use and increase the service life, people's research and design battery management system.
Current battery management system is widely used on the large-scale on-vehicle battery such as electric automobile, hybrid vehicle, but electric bicycle field, consider its cost and people's the level of consumption, its on-vehicle battery is not yet installed battery management system, this is all right for lead-acid battery and Ni-MH battery, but along with popularizing of lithium cell electric bicycle, for the particularity of lithium battery, discharge and recharge improper as overcharge, cross put, excess temperature, overcurrent etc. will damage battery, cause the unrepairable of lithium battery, security incident also can occur when serious.In the use procedure of electric bicycle; need to detect in real time voltage, electric current, the temperature of battery pack; prevent the overcharging of on-vehicle battery, cross put, the phenomenon such as excess temperature and overcurrent; realize the protection to lithium battery group; and effectively prevent the generation of various potential safety hazards; therefore battery management system should develop into a part for lithium cell electric bicycle, is the safety guarantee of lithium battery motor-car.
In the prior art, still there is the defect of following several respects about lithium cell for electric bicycle management of charging and discharging system:
Discharge and recharge inconsistently for solving each single lithium battery, must in system, increase balance module, but electric bicycle inner space is limited, and the bulky module complexity of existing balance module.Be unfavorable for practical application.
Security performance Check processing when the system of lithium battery is used is perfect not, should detect in real time voltage, electric current, the temperature of battery pack, prevent the overcharging of on-vehicle battery, cross put, the phenomenon such as excess temperature and overcurrent, the potential safety hazard that battery is used drops to minimum.
Utility model content
The defect existing in order to overcome above-mentioned prior art; the utility model provides a kind of charging and discharging lithium battery management system; the state parameter of monitoring lithium battery in real time; and carry out unbalanced control between over-charge protective, Cross prevention and single lithium battery etc. according to state parameter, thereby improve performance and the safety of lithium battery system.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of charging and discharging lithium battery management system, comprises the first switch, the first switch drive module, charging module, lithium battery monitoring unit, current detection module, total voltage detection module, microcontroller, lithium battery group, second switch driver module, second switch and power module;
Described power module is electrically connected with city, and it provides power supply for system modules;
Being connected or disconnection between described the first switch control civil power input and charging module, its input is electrically connected with city, and its output is connected with charging module;
Described the first switch drive module is connected with described the first switch, controls conducting or the closure of described the first switch;
Described second switch control lithium battery group is connected or disconnection with load, and its input is connected with lithium battery group, and its output is connected with load;
Described second switch driver module is connected with described second switch, controls conducting or the closure of described second switch;
Described charging module is connected with lithium battery group, controls the charging of described lithium battery group;
Described lithium battery group is composed in series by N single lithium battery;
Described lithium battery monitoring unit is made up of the individual independently monomer monitoring module of N, and any monomer monitoring module is monitored the performance parameter of a coupled single lithium battery;
Described monomer monitoring module at least comprises voltage sample module, temperature sampling module and overvoltage balance module; Described voltage sample module detects the magnitude of voltage of single lithium battery; Described temperature sampling module detects the temperature value of single lithium battery; Described overvoltage balance module is for consuming unnecessary energy, when single lithium battery voltage is during higher than predeterminated voltage value, automatically opens overvoltage balance module and consumes unnecessary energy;
Described current detection module is connected with lithium battery group, detects the operating current of lithium battery group while discharging and recharging;
Described total voltage detection module is connected with lithium battery group, detects the operating voltage of lithium battery group while discharging and recharging;
Described microcontroller is the core of this charging and discharging lithium battery management system, and it is connected with lithium battery monitoring unit, current detection module, total voltage detection module, the first switch drive module, charging module and second switch driver module; Described microcontroller receives the signal that lithium battery monitoring unit, current detection module and total voltage detection module send, and these signals are carried out to analyzing and processing, control signal after treatment is sent to the first switch drive module, charging module and second switch driver module simultaneously, thereby charging and discharging lithium battery is carried out to control and management.
Preferably, described overvoltage balance module comprises three-terminal voltage regulator U1, the first triode Q1, the first diode D1, the second diode D2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the first capacitor C 1 and the second capacitor C 2, wherein
1 pin of three-terminal voltage regulator U1 is connected with one end of one end of the 5th resistance R 5 and the 7th resistance R 7; The other end of the 5th resistance R 5 is connected with one end of the first resistance R 1; The other end of the first resistance R 1 is connected with one end, one end of the second resistance R 2 and the emitter of the first triode Q1 of the first capacitor C 1;
2 pin of three-terminal voltage regulator U1 are connected with one end of the other end of the second resistance R 2 and the 4th resistance R 4; The other end of the 4th resistance R 4 is connected with the base stage of the first triode Q1;
3 pin of three-terminal voltage regulator U1 are connected with the other end of the other end of the 7th resistance R 7, the first capacitor C 1, negative electrode, one end of the second capacitor C 2 and one end of the 6th resistance R 6 of the second diode D2; The anode of the second diode D2 is connected with the other end of the second capacitor C 2 and one end of the 3rd resistance R 3; The anodic bonding of the collector electrode of the other end of the 3rd resistance R 3 and the first triode Q1 and the first diode D1; The negative electrode of the first diode D1 is connected with the other end of the 6th resistance R 6.
Preferably, described microcontroller transmits control signal and selects charge mode to charging module.
Preferably, in charging process, in the time that described microcontroller detects some single lithium battery in overvoltage condition, send control signal to described charging module, it is charged to described lithium battery group with certain constant current.
Preferably, have at least a monomer monitoring module to comprise voltage sample module, described lithium battery monitoring unit also comprises multidiameter option switch, described multidiameter option switch is connected with lithium battery group, voltage sample module and microcontroller, described microcontroller transmits control signal and selects a road conducting to multidiameter option switch, and a single lithium battery is connected with voltage sample module.
By adopting above technical scheme, the beneficial effects of the utility model are:
(1) by increase overvoltage balance module in system, solve each single lithium battery and discharged and recharged inconsistently, simultaneously overvoltage balance module small volume, is conducive to practical application.
(2) by detecting in real time voltage, electric current, the temperature of battery pack, prevent the overcharging of on-vehicle battery, cross put, the phenomenon such as excess temperature and overcurrent, the potential safety hazard that battery is used drops to minimum.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model embodiment charging and discharging lithium battery management system.
Fig. 2 is the schematic diagram of lithium battery SOC discharge curve at varying environment temperature of the utility model embodiment.
Open circuit voltage and SOC relation curve schematic diagram when Fig. 3 is the utility model embodiment lithium battery static state.
Fig. 4 is the schematic diagram of the utility model embodiment lithium cell charging pattern and charging curve.
Fig. 5 is the theory diagram of monomer monitoring module in the utility model embodiment charging and discharging lithium battery management system.
Fig. 6 is the schematic diagram of the overvoltage balance module of the utility model embodiment charging and discharging lithium battery management system.
Fig. 7 is the theory diagram of lithium battery monitoring unit in the utility model embodiment charging and discharging lithium battery management system.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
On the contrary, the utility model contain any defined by claim in marrow of the present utility model and scope, make substitute, modification, equivalent method and scheme.Further, for the public is had a better understanding to the utility model, in below details of the present utility model being described, detailed some specific detail sections of having described.Do not have for a person skilled in the art the description of these detail sections can understand the utility model completely yet.
Referring to Fig. 1, be depicted as the theory diagram of the charging and discharging lithium battery management system of the utility model embodiment.The charging and discharging lithium battery management system 100 of the present embodiment comprises the first switch 101, the first switch drive module 102, charging module 103, lithium battery monitoring unit 104, current detection module 105, total voltage detection module 106, microcontroller 107, lithium battery group 108, second switch driver module 109, second switch 110 and power module 111;
Power module 111Yu city electrical connection, it provides power supply for system modules;
The first switch 101 is controlled being connected or disconnection between civil power input and charging module 103, and its input is electrically connected with city, and its output is connected with charging module 103;
The first switch drive module 102 is connected with the first switch 101, drives conducting or the closure of the first switch 101;
Second switch driver module 109 is connected with second switch 110, drives conducting or the closure of second switch 110;
Charging module 103 is connected with lithium battery group 108, and lithium battery group 108 is charged;
Lithium battery group 108 is composed in series by N single lithium battery, is respectively single lithium battery 1, single lithium battery 2, single lithium battery 3...... and single lithium battery N;
Lithium battery monitoring unit 104 is at least made up of the individual independently monomer monitoring module of N, be made up of monomer monitoring module 1, monomer monitoring module 2, monomer monitoring module 3...... and monomer monitoring module N, any monomer monitoring module is monitored the performance parameter of a coupled single lithium battery;
Monomer monitoring module at least comprises voltage sample module 201, temperature sampling module 202 and overvoltage balance module 203, and voltage sample module 201 detects the magnitude of voltage of single lithium battery; Temperature sampling module 202 detects the temperature value of single lithium battery; The balanced way of overvoltage balance module 203 adopts the mode of resistance power consumption, when single lithium battery voltage is during higher than predeterminated voltage value, automatically opens overvoltage balance module and consumes unnecessary energy;
Current detection module 105 is connected with lithium battery group 108, detects the operating current of lithium battery group 108 while discharging and recharging;
Total voltage detection module 106 is connected with lithium battery group 108, detects the operating voltage of lithium battery group 108 while discharging and recharging;
Microcontroller 107 is the core of this charging and discharging lithium battery management system, and it is connected with lithium battery monitoring unit 104, current detection module 105, total voltage detection module 106, the first switch drive module 102, charging module 103 and second switch driver module 109;
Microcontroller 107 receives the signal that lithium battery monitoring unit 104, current detection module 105 and total voltage detection module 106 send, and these signals are carried out to analyzing and processing, signal after treatment is sent to the first switch drive module 102, charging module 103 and second switch driver module 109 simultaneously, thereby charging and discharging lithium battery is carried out to control and management.
In charging and discharging lithium battery management system, main total voltage value, current value, the magnitude of voltage of each single lithium battery and the temperature value of single lithium battery that detects lithium battery, microcontroller 107 carries out control and management according to these signals to charging and discharging lithium battery switch and charge mode.
In the use procedure of electrokinetic cell, lithium battery electric discharge is a nonlinear dynamic process, be subject to temperature, discharge and recharge the impact of the factors such as number of times and cell degradation, only have in the situation that accurately estimates lithium battery residual capacity (SOC), could realize the control and management that discharges and recharges to lithium battery.Referring to Fig. 2, be depicted as lithium battery SOC discharge curve at varying environment temperature of the utility model embodiment, the SOC curve chart that lithium battery discharges at 0 ℃, 20 ℃ and 40 ℃ completely with 0.2C discharge-rate, as can be seen from the figure, battery temperature is very large on the impact of SOC, the charging temperature of battery that the design adopts is 0 to 45 ℃, and discharge temp is-20 to 60 ℃.
Therefore, in to the estimation of lithium battery SOC, first according to the temperature value of single lithium battery, select corresponding SOC discharge curve, estimate respectively the SOC of each single lithium battery, then calculate the SOC of lithium battery group.
When lithium battery is in static state, when lithium battery does not discharge, adopt open circuit voltage method estimating battery SOC.Referring to Fig. 3, open circuit voltage and SOC relation curve schematic diagram while being depicted as lithium battery static state, between the open circuit voltage of battery and the SOC of battery, there is certain corresponding relation, the relation curve that records battery terminal voltage and battery SOC in different discharging current situations by test method, is recorded as data form and stores.Terminal voltage during like this by real-time sampling battery discharge, tables look-up and can try to achieve the SOC of current time battery.While using the method, lithium battery group need to leave standstill a period of time, thus cannot detect detection of dynamic open circuit voltage, so method cannot be used for the SOC estimation of dynamic battery.
Dynamically SOC estimation adopts ampere-hour method, and ampere-hour method is that computing formula is suc as formula (1), in formula: t0 measures initial time by not stopping to detect electric current and carrying out integration and calculate the electric weight that battery absorbs or discharges; T1 is for measuring the end time; Q0 is battery capacity; Qt0 is for measuring initial time electric weight; η is efficiency for charge-discharge; I is charging and discharging currents.
Ampere-hour method is calculated easy, but also has very large defect.The not high integral error that will cause of for example current measurement precision increases, and the accuracy of SOC value is reduced, and therefore native system is very high to current measurement required precision.
Under introducing in detail below, the method for native system SOC estimation.Before electric motor car starts, calculate the SOC0 of battery initial time by open circuit voltage method.Because of lithium battery, its open circuit voltage and SOC in its stable performance exist linear relationship clearly, and it is less affected by the factor such as temperature, cell degradation, therefore available formula (2) directly calculates the initial value SOC0 of dump energy, in formula, Uk is open circuit voltage, a, b are estimation coefficient, a is the open circuit voltage of battery while being full of electricity, and b is the open circuit voltage after battery is fully discharged.
SOC
0=(U
k-b)(a-b) （2）
After electric motor car starts, calculate the residual capacity of battery by ampere-hour integration method, CB for battery with the current i B that demarcates for capacity that constant-current discharge was had; As shown in Equation (3):
SOC=SOC
0-Q
B/C
B （3）
In formula
And K=K1*K2 is current compensation coefficient, K1 is temperature compensation coefficient, and K2 is lithium ion battery discharge under the normal temperature ratio of the electric weight Q being emitted of the electric weight QB discharging current i different from other that emitted that discharges under normal temperature with normalized current iB, i.e. K
2=Q
bq, the value of K2 can be tried to achieve by test.
K1 is that the formula that temperature compensated by common-used formula (5) is determined, wherein, normal temperature represents with TB, and design temperature represents with T.
K
1=1+0.008(T
B-T) (5)
Determining of K2 value is as follows, is known by Parker spy (peukert) formula, and the relation of the residual capacity of battery discharge and the discharging current of battery pack as the formula (6).
SOC=K×i
1-n (6)
As long as initial condition is identical, K and n are identical, therefore have formula (7), thereby can obtain K2 with several groups of SOC, i.It is worth between 1.15～1.42, and this equation also illustrates that discharging current is larger, and battery capacity is less.
K
2=C
BC=(ii
B)
n-1 (7)
Open circuit voltage is combined to the formula of obtaining (8) with ampere-hour method, in the method, needs the data of measuring to have: open circuit voltage Uk, dynamic current i and temperature T.Utilize this formula can try to achieve the dump energy of battery pack.
Referring to Fig. 4, be depicted as the schematic diagram of the utility model embodiment lithium cell charging pattern and charging curve, native system adopts three sections of charging methods, i.e. precharge, constant current charge and constant voltage charge to lithium cell charging.It shown in figure, is the change curve such as voltage, electric current in lithium cell charging process.
Lithium battery in electric bicycle or electronic battery vehicle is operated in sealed environment, add the particularity of lithium ion battery itself, charging process is improper very easily blasts etc., not only damage battery, when serious, also can cause security incident, so will carry out strict charging control to lithium battery, be mainly to control charging voltage and limit charging current.
Charging module 103 has at least three kinds of charge modes, is respectively precharge mode, constant current charging mode and constant voltage charge pattern; Microcontroller 107 transmits control signal and selects the charge mode of charging module 103.Select corresponding modes to charge to lithium battery group 108 according to the parameter of lithium battery group 108;
Precharge mode is to be first charged to certain voltage with little electric current, then carries out quick charge.Because lithium ion battery has higher energy Ratios, if directly carry out quick charge, can battery be produced and be damaged, so designed pre-charge process, the preferred version adopting in reality, charging the incipient stage, if lithium battery voltage be less than nominal voltage 30% time, microcontroller 107 is to charging module 103 control commands, and charging module 103 enters precharge mode.
In constant current charging mode, provide large constant current to charge to lithium battery, thereby charging rate is accelerated, cell voltage fast rise, the preferred version adopting in reality, in charging process, when SOC is greater than 30% but while not reaching 80%, microcontroller 107 is to charging module 103 control commands, charging module 103 remains on constant current charging mode.
In constant voltage charge pattern, electric current is smaller, charging rate is slow, in the time that charging current drops to setting, stop charging, the preferred version adopting in reality, in the time that SOC is greater than 80%, microcontroller 107 is to charging module 103 control commands, and charging module 103 enters constant voltage charge pattern, when electric current drops to below 10mA, microcontroller 107 is to charging module 103 control commands, and charging module 103 stops charging.
Consistency difference between each single lithium battery be not too large in, adopt above method substantially can realize the charging to lithium battery group.But when consistency difference between each single lithium battery is king-sized, such as when in constant current charging mode time, one of them single lithium battery is in overvoltage condition, although now opened overvoltage balance module, but the utility model embodiment overvoltage balance module is the mode that adopts power resistor power consumption, under constant current charging mode, charging current is very large, balance module cannot consume whole energy, can burn out balance module or cause the damage of single lithium battery because overcharge.
In order to solve the problems of the technologies described above, charging module 103 also has overvoltage constant current charging mode, overvoltage constant current charging mode refers in the time some or several single lithium battery being detected in overvoltage condition, charging module 103 charges to lithium battery group 108 with certain constant little electric current, and the energy consumption resistor of the size of certain constant little electric current and overvoltage balance module adapts.Under this charge mode, the single lithium battery under overvoltage condition, its rechargeable energy is enough to be consumed by balance module, has avoided, because overcharge, single lithium battery is caused to damage; Other single lithium battery still can be charged with constant little electric current, and the consistent performance between single lithium battery is necessarily improved, thereby have promoted on the whole the performance of lithium battery.
Ginseng, as Fig. 6, is depicted as the circuit theory diagrams of the utility model embodiment overvoltage balance module, and in figure, U1 is parallel connection type three-terminal voltage-stabilizing pipe TL431, the first triode is pliotron S8550, the first diode D1 is light-emitting diode, and the 3rd resistance R 3 is power resistors, is mainly used to consume electric energy.Once over-charging of battery, TL431 is just open-minded, and the transmitting PN junction of S8550 is opened owing to bearing malleation, and power consumption resistance just starts consuming cells electric energy immediately, until cell voltage is dragged to equilibrium point, judges the equilibrium state of battery by the light on and off of light-emitting diode.By the resistance that regulates the first resistance R 1, the 5th resistance R 5 and the 7th resistance R 7, equilibrium point is set.
Lithium battery monitoring unit 104 is made up of N monomer monitoring module, if each monomer monitoring module adopts a voltage acquisition module, will increase the complexity of circuit, also can affect the consistency of voltage sample.
In order to address the above problem, referring to Fig. 7, be depicted as the theory diagram of lithium battery monitoring unit in the present embodiment charging and discharging lithium battery management system, have at least a monomer monitoring module 200 to comprise voltage sample module 201, lithium battery monitoring unit 104 also comprises multidiameter option switch 112, multidiameter option switch 112 is connected with lithium battery group 108, voltage sample module 201 and microcontroller 107, microcontroller 107 transmits control signal and selects a road conducting to multidiameter option switch 112, and 201 of each moment voltage sample modules gather the voltage of a single lithium battery.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. a charging and discharging lithium battery management system, it is characterized in that, comprise the first switch (101), the first switch drive module (102), charging module (103), lithium battery monitoring unit (104), current detection module (105), total voltage detection module (106), microcontroller (107), lithium battery group (108), second switch driver module (109), second switch (110) and power module (111);
Described power module (111) is electrically connected with city, and it provides power supply for system modules;
Described the first switch (101) is controlled being connected or disconnection between civil power input and charging module (103), and its input is electrically connected with city, and its output is connected with charging module (103);
Described the first switch drive module (102) is connected with described the first switch (101), controls conducting or the closure of described the first switch (101);
Described second switch (110) control lithium battery group (108) is connected or disconnection with load, and its input is connected with lithium battery group (108), and its output is connected with load;
Described second switch driver module (109) is connected with described second switch (110), controls conducting or the closure of described second switch (110);
Described charging module (103) is connected with lithium battery group (108), controls the charging of described lithium battery group (108);
Described lithium battery group (108) is composed in series by N single lithium battery;
Described lithium battery monitoring unit (104) is made up of the individual independently monomer monitoring module of N, and any monomer monitoring module is monitored the performance parameter of a coupled single lithium battery;
Described monomer monitoring module at least comprises voltage sample module (201), temperature sampling module (202) and overvoltage balance module (203); Described voltage sample module (201) detects the magnitude of voltage of single lithium battery; Described temperature sampling module (202) detects the temperature value of single lithium battery; Described overvoltage balance module (203) is for unnecessary energy is consumed, and when single lithium battery voltage is during higher than predeterminated voltage value, automatically opens overvoltage balance module and consumes unnecessary energy;
Described current detection module (105) is connected with lithium battery group (108), detects the operating current of lithium battery group (108) while discharging and recharging;
Described total voltage detection module (106) is connected with lithium battery group (108), detects the operating voltage of lithium battery group (108) while discharging and recharging;
Described microcontroller (107) is the core of this charging and discharging lithium battery management system, and it is connected with lithium battery monitoring unit (104), current detection module (105), total voltage detection module (106), the first switch drive module (102), charging module (103) and second switch driver module (109); Described microcontroller (107) receives the signal that lithium battery monitoring unit (104), current detection module (105) and total voltage detection module (106) send, and these signals are carried out to analyzing and processing, control signal after treatment is sent to the first switch drive module (102), charging module (103) and second switch driver module (109) simultaneously, thereby charging and discharging lithium battery is carried out to control and management.
2. charging and discharging lithium battery management system according to claim 1, it is characterized in that, described overvoltage balance module (203) comprises three-terminal voltage regulator U1, the first triode Q1, the first diode D1, the second diode D2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the first capacitor C 1 and the second capacitor C 2, wherein
1 pin of three-terminal voltage regulator U1 is connected with one end of one end of the 5th resistance R 5 and the 7th resistance R 7; The other end of the 5th resistance R 5 is connected with one end of the first resistance R 1; The other end of the first resistance R 1 is connected with one end, one end of the second resistance R 2 and the emitter of the first triode Q1 of the first capacitor C 1;
2 pin of three-terminal voltage regulator U1 are connected with one end of the other end of the second resistance R 2 and the 4th resistance R 4; The other end of the 4th resistance R 4 is connected with the base stage of the first triode Q1;
3 pin of three-terminal voltage regulator U1 are connected with the other end of the other end of the 7th resistance R 7, the first capacitor C 1, negative electrode, one end of the second capacitor C 2 and one end of the 6th resistance R 6 of the second diode D2; The anode of the second diode D2 is connected with the other end of the second capacitor C 2 and one end of the 3rd resistance R 3; The anodic bonding of the collector electrode of the other end of the 3rd resistance R 3 and the first triode Q1 and the first diode D1; The negative electrode of the first diode D1 is connected with the other end of the 6th resistance R 6.
3. charging and discharging lithium battery management system according to claim 1 and 2, is characterized in that, described microcontroller (107) transmits control signal and selects charge mode to charging module (103).
4. charging and discharging lithium battery management system according to claim 3, it is characterized in that, in charging process, in the time that described microcontroller (107) detects some single lithium battery in overvoltage condition, send control signal to described charging module (103), it is charged to described lithium battery group (108) with certain constant current.
5. charging and discharging lithium battery management system according to claim 1 and 2, it is characterized in that, have at least a monomer monitoring module to comprise voltage sample module (201), described lithium battery monitoring unit (104) also comprises multidiameter option switch (112), described multidiameter option switch (112) and lithium battery group (108), voltage sample module (201) is connected with microcontroller (107), described microcontroller (107) transmits control signal and selects a road conducting to multidiameter option switch (112), a single lithium battery is connected with voltage sample module (201).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103715737A (en) * | 2013-12-23 | 2014-04-09 | 杭州电子科技大学 | Lithium battery charging/ discharging management system |
| CN106160082A (en) * | 2016-07-13 | 2016-11-23 | 刘仲尧 | A kind of differential lithium battery group |
| CN106877465A (en) * | 2017-04-25 | 2017-06-20 | 山东威林特新能源科技有限公司 | A kind of many quickly charging battery systems for lithium titanate battery |
| CN106898837A (en) * | 2015-12-21 | 2017-06-27 | 加百裕工业股份有限公司 | The temperature detecting management method and system of lithium battery |
| CN107250823A (en) * | 2014-11-04 | 2017-10-13 | 江森自控科技公司 | The scalable modular design of 48 V Li-ion battery management systems |
| CN107359374A (en) * | 2017-08-18 | 2017-11-17 | 联想(北京)有限公司 | Method, equipment and memory devices for treatment of battery potential safety hazard |
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| CN103715737A (en) * | 2013-12-23 | 2014-04-09 | 杭州电子科技大学 | Lithium battery charging/ discharging management system |
| CN107250823A (en) * | 2014-11-04 | 2017-10-13 | 江森自控科技公司 | The scalable modular design of 48 V Li-ion battery management systems |
| US10749148B2 (en) | 2014-11-04 | 2020-08-18 | Cps Technology Holdings Llc | Scalable modular design of a 48-volt li-ion battery management system |
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