CN111799497A - Battery formation system and battery formation method - Google Patents
Battery formation system and battery formation method Download PDFInfo
- Publication number
- CN111799497A CN111799497A CN202010614791.2A CN202010614791A CN111799497A CN 111799497 A CN111799497 A CN 111799497A CN 202010614791 A CN202010614791 A CN 202010614791A CN 111799497 A CN111799497 A CN 111799497A
- Authority
- CN
- China
- Prior art keywords
- battery
- unit
- control
- constant voltage
- power loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010280 constant potential charging Methods 0.000 claims abstract description 43
- 238000010277 constant-current charging Methods 0.000 claims abstract description 41
- 238000005070 sampling Methods 0.000 claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 239000000178 monomer Substances 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000007600 charging Methods 0.000 description 10
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a battery formation system and a battery formation method, wherein the battery formation system comprises: a battery power loop unit; one end of the sampling unit is electrically connected with the battery power loop unit and is used for collecting an electric signal of the battery power loop unit; the control unit is electrically connected with the other end of the sampling unit and used for outputting a control signal according to the electric signal; wherein the battery power circuit unit includes: a constant voltage adjusting unit and a unit cell; the constant voltage regulating unit with monomer battery parallel connection, the constant voltage regulating unit with the control unit electricity is connected, is used for receiving control signal is in order to adjust monomer battery constant voltage charges. The embodiment of the application ensures the continuity of constant-current and constant-voltage charging of the single battery and avoids the current jitter phenomenon of the battery power loop unit.
Description
Technical Field
The invention relates to the field of battery formation, in particular to a battery formation system and a battery formation method.
Background
At present, the battery formation mainly includes that single batteries are connected in series in a power loop, constant current charging is adopted firstly, when the single batteries reach a set voltage, the single batteries quit the constant current charging, and when all the single batteries in the power loop quit the constant current charging, all the single batteries in the power loop are uniformly charged at constant voltage. When the battery formation method is used for formation, the current jitter phenomenon can occur in a power loop, the stability of a battery formation process system is influenced, and the battery formation efficiency is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a battery formation system which can enable constant-current constant-voltage charging of a single battery to be continuous and a power circuit to have no current jitter phenomenon.
The invention also provides a battery formation method.
In a first aspect, an embodiment of the present invention provides a battery formation system, including: a battery power loop unit; one end of the sampling unit is electrically connected with the battery power loop unit and is used for collecting an electric signal of the battery power loop unit; the control unit is electrically connected with the other end of the sampling unit and used for outputting a control signal according to the electric signal; wherein the battery power circuit unit includes: a constant voltage adjusting unit and a unit cell; the constant voltage regulating unit with monomer battery parallel connection, the constant voltage regulating unit with the control unit electricity is connected, is used for receiving control signal is in order to adjust monomer battery constant voltage charges.
The battery formation system provided by the embodiment of the application has at least the following beneficial effects: the electric signal of the battery power loop unit is sampled in real time through the sampling unit, the sampled electric signal is sent to the control unit to be compared with the threshold value, and when the sampled electric signal is not within the threshold value range, the control unit controls the single battery to be switched from constant-current charging to constant-voltage charging, so that the continuity of the constant-current constant-voltage charging of the single battery is ensured, and the current jitter phenomenon of the battery power loop unit is avoided.
According to other embodiments of the present invention, the control unit includes: the control module is used for outputting a control quantity according to the electric signal; and one end of the driving module is electrically connected with the control module, and the other end of the driving module is electrically connected with the constant voltage adjusting unit and used for receiving the control quantity and outputting the control signal according to the control quantity.
According to other embodiments of the present invention, the constant voltage adjusting unit includes: an MOS tube; the MOS tube is connected with the single battery in parallel; the MOS tube works in the adjustable resistance area; the driving module outputs the control signal to adjust the resistance value of the MOS tube.
According to other embodiments of the present invention, the MOS transistors include at least two; the grids of the two MOS tubes are mutually and electrically connected; the drains of the two MOS tubes are mutually and electrically connected; and the source electrodes of the two MOS tubes are respectively and electrically connected with the two ends of the single battery.
According to other embodiments of the present invention, the constant voltage adjusting unit includes: an adjustable resistor; the adjustable resistor is connected with the single battery in parallel; the driving module outputs the control signal to adjust the resistance value of the adjustable resistor.
According to other embodiments of the present invention, the control module includes: the analog-to-digital conversion unit is used for converting the electric signal into a digital signal; and the signal processing unit is electrically connected with the analog-to-digital conversion unit and is used for receiving the digital signal and converting the digital signal into the control quantity according to a control algorithm.
Battery formation systems according to further embodiments of the present invention include at least two of the battery power loop units; the single battery in each battery power loop unit is connected with the single batteries in other battery power loop units in series to form a battery pack.
In a second aspect, an embodiment of the present invention provides a battery formation method, including: controlling the constant current charging of the single battery; the sampling unit collects the electric signal of the battery power loop unit and sends the electric signal to the control unit; the control unit judges the relation between the electric signal and a first threshold range; when the electric signal is not within the first threshold range, the control unit sends a control signal, and the constant voltage adjusting unit receives the control signal to adjust the constant voltage charging of the single battery.
According to other embodiments of the present invention, the control unit includes: the control module and the driving module; the control unit sends control signal, and constant voltage regulating unit receives control signal is in order to adjust battery cell constant voltage charges includes: the control module outputs a control quantity according to the electric signal; the driving module receives the control quantity and outputs a control signal according to the control quantity; the constant voltage adjusting unit adjusts the resistance value according to the control signal so as to adjust the constant voltage charging of the single battery.
According to other embodiments of the present invention, the battery formation system comprises at least two battery power loop units; the single battery in each battery power loop unit is connected with the single batteries in other battery power loop units in series to form a battery pack; controlling the single battery of the electric signal within the first threshold value range to perform constant current charging; and if the two single batteries are in the constant-voltage charging state and the voltages of the two single batteries are in a second threshold range, the battery pack completes the formation process.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a block diagram of an embodiment of a battery formation system according to the present disclosure;
FIG. 2 is a block diagram of another embodiment of a battery formation system according to an embodiment of the present disclosure;
FIG. 3 is a block diagram of another embodiment of a battery formation system according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart of an embodiment of a battery formation method in the present application.
Reference numerals:
the battery power circuit unit 100, the constant voltage adjusting unit 110, the sampling unit 200, the control unit 300, the control module 310, the analog-to-digital conversion unit 311, the signal processing unit 312, and the driving module 320.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the present invention, if a feature is referred to as being "disposed", "fixed", "connected", or "mounted" to another feature, it can be directly disposed, fixed, or connected to the other feature or indirectly disposed, fixed, connected, or mounted to the other feature.
In the description of the embodiments of the present application, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
The battery formation refers to a process of firstly charging the battery aged at high temperature, activating the battery and forming an SEI (Solid Electrolyte Interface) film on the surface of the negative electrode of the battery.
In the related art, the following two formation methods are mainly used: firstly, in the process of battery formation, a single battery is charged by adopting a constant current, when the voltage of the single battery reaches a set voltage, the single battery quits the constant current charging until all the single batteries in the battery formation system quit the constant current charging, and then all the single batteries in the battery formation system are uniformly charged at a constant voltage. And secondly, in the process of battery formation, constant-current charging is firstly carried out, when the voltage of a certain single battery meets a constant-voltage condition, the single battery is subjected to constant-voltage charging, the rest single batteries adopt a current following mode, when the voltage of the single battery reaches a set voltage, the single battery formation system is withdrawn, the rest single batteries continue to carry out constant-current charging or constant-voltage charging until all the single batteries withdraw from the battery formation system, and the formation is finished at the moment. In the first method, the constant-current and constant-voltage charging of the single battery can not be continuously carried out; in the second method, the battery meeting the constant voltage condition can follow the constant voltage current of the single battery entering the constant voltage charging stage in advance, so that the time of the constant current charging stage is insufficient, the charging voltage of the power loop in the constant voltage charging stage can be adjusted in steps along with the number of the single batteries exiting the battery formation system, and the power loop generates a current fluctuation phenomenon in the process of exiting the battery formation system from the single battery.
Based on this, the embodiment of the application provides a battery formation system and a battery formation method, so that constant-current and constant-voltage charging of a single battery is continuous, no current fluctuation phenomenon exists in a power loop, and the formation efficiency and the formation stability of the battery formation system are improved.
It should be noted that the control module includes a single chip microcomputer, a field programmable gate array, an embedded processor, a programmable logic controller, and the like, and the single chip microcomputer includes a 51 single chip microcomputer, an AVR single chip microcomputer, and the like. In the embodiment of the present application, the control module is not particularly limited.
In a first aspect, the present application provides a battery formation system.
Referring to fig. 1, in some embodiments, the battery formation system includes a battery power loop unit 100, a sampling unit 200, and a control unit 300, wherein one end of the sampling unit 200 is electrically connected to the battery power loop unit 100, the other end of the sampling unit 200 is electrically connected to the control unit 300, and the control unit 300 is electrically connected to the battery power loop unit 100. Wherein the battery power circuit unit 100 includes a constant voltage adjusting unit 110 and a unit battery BT1, the constant voltage adjusting unit 110 is connected in parallel with the unit battery BT1, and the control unit 300 is electrically connected with the constant voltage adjusting unit 110. The sampling unit 200 is configured to collect an electrical signal of the battery power loop unit 100, where the electrical signal includes a voltage signal or a current signal, and the embodiment of the present application is not particularly limited. The control unit 300 receives the electrical signal sent by the sampling unit 200 and outputs a control signal according to the electrical signal, and the constant voltage adjusting unit 110 adjusts the single battery to perform constant voltage charging according to the control signal. In a specific embodiment, the single battery BT1 is first subjected to constant current charging, the sampling unit 200 collects the voltage of the battery power loop unit 100, the control unit 300 determines whether the voltage of the battery power loop unit 100 is within a threshold range, if the voltage of the battery power loop unit 100 is within the threshold range, it indicates that the single battery BT1 is still in the constant current charging stage, and the single battery BT1 continues to perform constant current charging; if the voltage of the battery power loop unit 100 is not in the threshold range, the constant current charging of the single battery BT1 is completed, the control unit 300 outputs a corresponding control signal according to the voltage of the battery power loop unit 100, and the constant voltage adjusting unit 110 adjusts the single battery BT1 to enter a constant voltage charging stage according to the control signal. It will be appreciated that the threshold range may be adapted according to actual requirements.
The embodiment of the application samples the electric signal of the battery power loop unit 100 in real time through the sampling unit 200, and sends the sampled electric signal to the control unit 300 for threshold comparison, when the sampled electric signal is not within the threshold range, the control unit 300 sends a control signal to control the single battery to be switched from the constant-current charging state to the constant-voltage charging state, so that the continuity of constant-current and constant-voltage charging of the single battery is ensured, and the formation efficiency of the single battery is improved.
Referring to fig. 2, in some embodiments, the battery formation system control unit 300 includes: the constant voltage regulator comprises a control module 310 and a driving module 320, wherein one end of the driving module 320 is electrically connected with the control module 310, and the other end of the driving module 320 is electrically connected with the constant voltage regulating unit 110. The control module 310 outputs a control quantity according to the electrical signal collected by the sampling unit 200, the driving module 320 receives the control quantity and outputs a corresponding control signal to the constant voltage adjusting unit 110 according to the control quantity, and the constant voltage adjusting unit 110 adjusts the single battery to perform constant voltage charging according to the control signal. In a specific embodiment, the single battery BT1 is first subjected to constant current charging, the sampling unit 200 collects the voltage of the battery power loop unit 100, the control module 310 determines whether the voltage of the battery power loop unit 100 is within a threshold range, if the voltage of the battery power loop unit 100 is within the threshold range, it indicates that the single battery BT1 is still in the constant current charging stage, and the single battery BT1 continues to perform constant current charging; if the voltage of the battery power loop unit 100 is not within the threshold range, it indicates that the constant current charging of the battery cell BT1 is completed, the control module 310 outputs a corresponding control quantity according to the voltage of the battery power loop unit 100, the driving module 320 receives the control quantity and outputs a corresponding control signal, and the constant voltage adjusting unit 110 adjusts the battery cell BT1 to enter a constant voltage charging stage according to the control signal. It will be appreciated that the threshold range may be adapted according to actual requirements.
In some embodiments, the constant voltage adjusting unit 110 includes a MOS transistor connected in parallel with the unit cell BT 1. The MOS transistor works in the adjustable resistance region, and the driving module 320 outputs a control signal to adjust the resistance of the MOS transistor, that is, adjusts the voltage Ugs between the gate and the source of the MOS transistor according to the control signal, so as to implement the change of the resistance of the MOS transistor. Specifically, when the voltage of the battery power loop unit 100 is not in the threshold range, which indicates that the unit battery BT1 has completed constant current charging at this time, according to the formula R ═ Vb/I, the resistance value of the MOS transistor is adjusted to make the voltage of the battery power loop unit 100 equal to Vb, and the unit battery BT1 enters the constant voltage charging stage from the constant current charging stage. Wherein, voltage Vb represents a constant voltage, resistance R represents an equivalent resistance of a battery power circuit, and current I represents a constant current. When the unit battery BT1 operates in the constant voltage charging phase, the equivalent resistance R of the battery power loop unit 100 satisfies R ═ Vb/I, that is, the current I ═ I1+ I2, the current I1 represents the branch current of the constant voltage regulating unit 110, and the current I2 represents the branch current of the unit battery BT 1. It can be understood that the values of the constant voltage Vb and the constant current I can be adaptively adjusted according to actual needs, and the embodiment is not particularly limited.
In some embodiments, referring to fig. 2, the constant voltage regulating unit 110 includes at least two MOS transistors, gates of the two MOS transistors are electrically connected, drains of the two MOS transistors are electrically connected, and sources of the two MOS transistors are electrically connected to two ends of the unit battery BT1, respectively. The two MOS transistors make the constant voltage adjusting unit 110 in a bidirectional current mode, which not only realizes the formation and charging of the battery, but also realizes the capacity-divided discharging of the battery, and avoids the generation of parasitic capacitance and the occurrence of reverse leakage.
In some embodiments, the constant voltage adjusting unit 110 includes an adjustable resistor connected in parallel with the unit battery BT 1. When the voltage of the battery power loop unit 100 is not within the threshold range, it indicates that the battery cell BT1 has completed the constant current charging, the resistance value of the adjustable resistor is adjusted according to the control signal output by the driving module 320, so that the resistance of the battery power loop unit 100 satisfies the formula R ═ Vb/I, that is, the current I ═ I1+ I2, and the battery cell BT1 is adjusted to enter the constant voltage charging stage. Wherein, the voltage Vb represents a constant voltage, the resistance R represents an equivalent resistance of the battery power circuit, the current I represents a constant current, the current I1 represents a branch current of the constant voltage regulating unit 110, and the current I2 represents a branch current of the battery cell BT 1. It can be understood that the values of the constant voltage Vb and the constant current I can be adaptively adjusted according to actual needs, and the embodiment is not particularly limited.
In some embodiments, the control module 310 includes: the analog-to-digital conversion unit 311 and the signal processing unit 312, the analog-to-digital conversion unit 311 is electrically connected with the signal processing unit 312. The analog-to-digital conversion unit 311 performs a digital operation on the electrical signal acquired by the sampling unit 200, for example: and D/A processing, namely converting the electric signals into corresponding digital signals. The signal processing unit 312 receives the digital signal and converts the digital signal into a control quantity according to a control algorithm, the driving module 320 receives the control quantity and converts the control quantity into a corresponding control signal, and the voltage Ugs between the gate and the source of the MOS transistor is adjusted according to the control signal to change the resistance value of the MOS transistor, so that after the single battery BT1 enters the constant voltage charging stage, the equivalent resistance R of the battery power circuit unit 100 always satisfies R ═ Vb/I, that is, the current I ═ I1+ I2. Wherein, voltage Vb represents a constant voltage, resistance R represents an equivalent resistance of a battery power circuit, and current I represents a constant current. It is understood that the control algorithm includes PI (Proportion, Integral), PD (Proportion, Differential), PID (Proportion, Integral, Differential), etc., and the control algorithm may be selected according to actual needs, and this embodiment is not limited in particular.
Referring to fig. 3, in some embodiments, the battery formation system includes at least two battery power loop units 100, wherein the battery cells in each battery power loop unit 100 are serially connected with the battery cells in other battery power loop units 100 to form a battery pack. Namely, the unit cell BT1 and the unit cell BTn are connected in series, and the unit cell BT1 and the unit cell BTn are connected to a constant voltage adjusting unit 110, the driving module 320, and the adoption unit, respectively. Each sampling unit 200 collects the electrical signals of the corresponding connected battery power loop units 100 and sends the electrical signals to the same control module 310. In a specific embodiment, the battery formation system further comprises a power supply module, the single battery BT1 and the single battery BTn form a battery pack, two ends of the power supply module are correspondingly electrically connected with a V + end and a V-end of the battery pack, and the power supply module provides a charging voltage for the battery formation system. Specifically, in the process of forming the battery pack, the battery pack is charged with a constant current, and at this time, the constant voltage adjusting unit 110 does not work, that is, the driving module 320 outputs a control signal to control the MOS transistor to be turned off. In the constant-current charging process, if the electrical signal acquired by the sampling unit 200 is not within the threshold range, the control module 310 controls the single battery connected with the sampling unit 200 to enter a constant-voltage charging stage, that is, the control module 310 sends a control quantity, and the corresponding driving module 320 sends a control signal to adjust the resistance value of the constant-voltage adjusting unit 110 connected in parallel with the single battery, so that the single battery enters the constant-voltage charging stage; if the electric signal collected by the sampling unit 200 is within the threshold range, the single battery connected to the sampling unit 200 continues to perform constant current charging. And after all the single batteries in the battery pack enter a constant voltage charging stage and the voltages of all the single batteries reach full-voltage, the battery formation system quits charging, and the battery formation process is finished. It can be understood that the full-charge voltage, that is, the voltage when the single battery is fully charged, the number of the battery power loop units 100 in the battery formation system, that is, the number of the single batteries connected in series in the battery pack, may be adaptively adjusted according to actual needs.
The embodiment of the application acquires the electric signal of the battery power loop unit 100 in real time through the sampling unit 200 to adjust the resistance value of the constant voltage adjusting unit 110, so that the continuous constant current and constant voltage charging of the single battery is realized. And when the voltage of all the single batteries in the battery pack reaches the full-electricity voltage, the battery formation system quits charging again, so that the current fluctuation phenomenon when a single battery quits the battery formation system is avoided.
In a second aspect, an embodiment of the present application provides a battery formation method, which is applied to a battery formation system.
Referring to fig. 4, in some embodiments, a battery formation method includes: s100, controlling the constant current charging of the single battery; s200, a sampling unit collects electric signals of a battery power loop unit and sends the electric signals to a control unit; s300, judging whether the electric signal is in a first threshold range by a control unit; and S400, controlling the single battery to charge at a constant voltage.
In step S100, a specific embodiment of controlling the constant current charging of the single battery is as follows: the two ends of the power supply module are correspondingly and electrically connected with the V + end and the V-end of the single battery, and the power supply module provides charging voltage for the battery formation system, so that the single battery is charged at constant current first.
Step S200, a specific embodiment in which the sampling unit collects the electric signal of the battery power loop unit and sends the electric signal to the control unit is as follows: the sampling unit collects the electric signals of the battery power loop unit in real time and sends the electric signals to the control unit, and when the electric signals collected by the collecting unit are not within the range of the first threshold value, the control unit controls the single battery to carry out constant voltage charging, so that the continuity of constant current and constant voltage charging of the single battery is ensured. In some embodiments, the control unit includes a control module and a driving module, the sampling unit collects an electrical signal of the battery power loop unit in real time and sends the electrical signal to the control module, and when the electrical signal collected by the collecting unit is not within a first threshold range, the driving module controls the single battery to perform constant voltage charging, so as to ensure the continuity of constant current and constant voltage charging of the single battery.
Step S300, a specific embodiment of the control unit determining whether the electrical signal is within the first threshold range is: the control unit judges the relation between the electric signal acquired by the sampling unit and a first threshold range, specifically, the control unit comprises a control module and a driving module, receives and judges the electric signal, and when the electric signal is in the first threshold range, the control unit indicates that the single battery continues to carry out constant current charging; and when the electric signal is not in the first threshold range, indicating that the constant-current charging stage of the single battery is finished, and controlling the single battery to enter the constant-voltage charging stage.
Step S400, one embodiment of controlling the constant voltage charging of the single battery is as follows: when the electric signal is not within the first threshold range, the control unit sends a control signal according to the electric signal collected by the sampling unit, and the constant voltage adjusting unit receives the control signal to adjust the constant voltage charging of the single battery. Specifically, the control unit comprises a control module and a driving module, the control module sends corresponding control quantity to the driving module according to the electric signal, the driving module receives the control quantity and outputs corresponding control signals to the constant voltage adjusting unit according to the control quantity, and the constant voltage adjusting unit receives the control signals to adjust the constant voltage charging of the single battery. It is understood that the value range of the first threshold can be adaptively adjusted as needed.
In some specific embodiments, the resistance value of the constant voltage adjusting unit is adjusted according to the control signal, that is, the resistance value of the MOS transistor and/or the adjustable resistor is adjusted according to the control signal, so that the equivalent resistor R of the battery power loop unit always satisfies R Vb/I, so as to adjust the single battery to enter the constant voltage charging phase. Wherein, voltage Vb represents a constant voltage, resistance R represents an equivalent resistance of a battery power circuit, and current I represents a constant current. Specifically, the analog-to-digital conversion unit performs digital operation on the electrical signal acquired by the sampling unit, and converts the electrical signal into a corresponding digital signal. The signal processing unit receives the digital signal and converts the digital signal into a control quantity according to a control algorithm, the driving module receives the control quantity and converts the control quantity into a corresponding control signal, and the voltage Ugs between the grid electrode and the source electrode of the MOS tube is adjusted according to the control signal so as to change the resistance value of the MOS tube, so that after the single battery BT1 enters a constant voltage charging stage, the equivalent resistance R of the battery power loop unit always meets the condition that R is Vb/I.
In some embodiments, the battery formation system comprises at least two battery power loop units, wherein the single battery in each battery power loop unit is connected in series with the single batteries in other battery power loop units to form a battery pack, and the single batteries with the electric signals within the first threshold range are controlled to be charged in a constant current mode. And when the two single batteries are in the constant voltage charging stage and the voltages of the two single batteries are in the second threshold value range, indicating that the battery pack is finished. Specifically, the unit battery BT1 and the unit battery BTn are connected in series, and if the unit battery BT1 and the unit battery BTn are both in the constant voltage charging stage and the voltages of the unit battery BT1 and the unit battery BTn are both in the second threshold range, the battery formation system is withdrawn from charging, and the formation of the battery pack is completed. It is understood that the second threshold is a full-charge voltage value, that is, a voltage when the single battery is fully charged, and the range of the second threshold and the number of the single batteries in the battery pack can be adaptively adjusted as needed.
In a specific embodiment, the battery pack is charged with a constant current, and at this time, the constant voltage regulating unit does not work, that is, the driving module outputs a control signal to control the MOS transistor to turn off. In the constant-current charging process, if the electric signal acquired by the sampling unit is not within the range of a first threshold value, the control module controls the single battery connected with the sampling unit to enter a constant-voltage charging stage, the control module sends a control quantity, and the corresponding driving module sends a control signal to adjust the resistance value of a constant-voltage adjusting unit connected in parallel with the single battery, so that the single battery enters the constant-voltage charging stage; and if the electric signal acquired by the sampling unit is within the first threshold range, the single battery connected with the sampling unit continues to perform constant current charging. And when all the single batteries in the battery pack enter a constant voltage charging stage and the voltages of all the single batteries are within the second threshold range, the battery formation system quits charging, and the battery formation process is finished.
The embodiment of the application acquires the electric signal of the battery power loop unit in real time through the sampling unit to adjust the resistance value of the constant voltage adjusting unit and realize the continuous constant current and constant voltage charging of the single battery. And when the voltage of all the single batteries in the battery pack reaches the full-electricity voltage, the battery formation system quits charging again, so that the current fluctuation phenomenon when a single battery quits the battery formation system is avoided.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A battery formation system, comprising:
a battery power loop unit;
one end of the sampling unit is electrically connected with the battery power loop unit and is used for collecting an electric signal of the battery power loop unit;
the control unit is electrically connected with the other end of the sampling unit and used for outputting a control signal according to the electric signal;
wherein the battery power circuit unit includes: a constant voltage adjusting unit and a unit cell;
the constant voltage regulating unit with monomer battery parallel connection, the constant voltage regulating unit with the control unit electricity is connected, is used for receiving control signal is in order to adjust monomer battery constant voltage charges.
2. The battery formation system according to claim 1, wherein the control unit includes:
the control module is used for outputting a control quantity according to the electric signal;
and one end of the driving module is electrically connected with the control module, and the other end of the driving module is electrically connected with the constant voltage adjusting unit and used for receiving the control quantity and outputting the control signal according to the control quantity.
3. The battery formation system according to claim 2, wherein the constant voltage adjustment unit includes: an MOS tube;
the MOS tube is connected with the single battery in parallel;
the MOS tube works in the adjustable resistance area;
the driving module outputs the control signal to adjust the resistance value of the MOS tube.
4. The battery formation system of claim 3, wherein the MOS transistors comprise at least two;
the grids of the two MOS tubes are mutually and electrically connected;
the drains of the two MOS tubes are mutually and electrically connected;
and the source electrodes of the two MOS tubes are respectively and electrically connected with the two ends of the single battery.
5. The battery formation system according to claim 2, wherein the constant voltage adjustment unit includes: an adjustable resistor;
the adjustable resistor is connected with the single battery in parallel;
the driving module outputs the control signal to adjust the resistance value of the adjustable resistor.
6. The battery formation system according to any one of claims 2 to 5, wherein the control module includes:
the analog-to-digital conversion unit is used for converting the electric signal into a digital signal;
and the signal processing unit is electrically connected with the analog-to-digital conversion unit and is used for receiving the digital signal and converting the digital signal into the control quantity according to a control algorithm.
7. The battery formation system of claim 6, wherein the battery formation system comprises at least two of the battery power loop units;
the single battery in each battery power loop unit is connected with the single batteries in other battery power loop units in series to form a battery pack.
8. The battery formation method is applied to a battery formation system and is characterized by comprising the following steps:
controlling the constant current charging of the single battery;
the sampling unit collects the electric signal of the battery power loop unit and sends the electric signal to the control unit;
the control unit judges the relation between the electric signal and a first threshold range;
when the electric signal is not within the first threshold range, the control unit sends a control signal, and the constant voltage adjusting unit receives the control signal to adjust the constant voltage charging of the single battery.
9. The battery formation method according to claim 8, wherein the control unit includes: the control module and the driving module;
the control unit sends control signal, and constant voltage regulating unit receives control signal is in order to adjust battery cell constant voltage charges includes:
the control module outputs a control quantity according to the electric signal;
the driving module receives the control quantity and outputs a control signal according to the control quantity;
the constant voltage adjusting unit adjusts the resistance value according to the control signal so as to adjust the constant voltage charging of the single battery.
10. The battery formation method according to claim 9, wherein the battery formation system includes at least two of the battery power circuit units;
the single battery in each battery power loop unit is connected with the single batteries in other battery power loop units in series to form a battery pack;
controlling the single battery of the electric signal within the first threshold value range to perform constant current charging;
and if the two single batteries are in a constant-voltage charging state and the voltages of the two single batteries are in a second threshold range, the battery pack completes the formation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010614791.2A CN111799497B (en) | 2020-06-30 | 2020-06-30 | Battery formation system and battery formation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010614791.2A CN111799497B (en) | 2020-06-30 | 2020-06-30 | Battery formation system and battery formation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111799497A true CN111799497A (en) | 2020-10-20 |
| CN111799497B CN111799497B (en) | 2022-04-15 |
Family
ID=72809632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010614791.2A Active CN111799497B (en) | 2020-06-30 | 2020-06-30 | Battery formation system and battery formation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111799497B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117792A (en) * | 2020-07-31 | 2020-12-22 | 西安交通大学 | A Model-Based Passive Equalization System and Equalization Current Estimation Method |
| CN112820962A (en) * | 2021-01-07 | 2021-05-18 | 广州擎天实业有限公司 | Constant voltage control method and system for lithium ion power battery series component capacity |
| CN113013511A (en) * | 2021-03-30 | 2021-06-22 | 时代一汽动力电池有限公司 | Battery series formation and capacity grading equipment |
| CN113060038A (en) * | 2021-04-22 | 2021-07-02 | 深圳市瑞能实业股份有限公司 | A series constant voltage charging system and method |
| CN114498853A (en) * | 2022-02-24 | 2022-05-13 | 上海类比半导体技术有限公司 | Series constant voltage charging system, method, electronic device and storage medium |
| WO2023035227A1 (en) * | 2021-09-10 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Battery formation apparatus, and control method and system for same |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241042A (en) * | 1998-05-27 | 2000-01-12 | 松下电器产业株式会社 | Accumulator charging method |
| CN2672668Y (en) * | 2004-01-17 | 2005-01-19 | 沈阳新松机器人自动化股份有限公司 | Lithium power battery formation measuring and controlling device |
| CN1578051A (en) * | 2003-06-19 | 2005-02-09 | 三星电子株式会社 | Battery charger circuits using constant current/constant voltage mode and methods of operating the same |
| CN200966004Y (en) * | 2006-07-17 | 2007-10-24 | 深圳市比克电池有限公司 | Battery charger |
| CN101814756A (en) * | 2010-04-12 | 2010-08-25 | 深圳市纳芯威科技有限公司 | Constant-current and constant-voltage control circuit, charging circuit and charger |
| CN102290846A (en) * | 2011-08-23 | 2011-12-21 | 广东金莱特电器股份有限公司 | Impedance type constant-voltage charging circuit with variable negative temperature coefficients |
| JP2015100235A (en) * | 2013-11-20 | 2015-05-28 | 富士通テレコムネットワークス株式会社 | Charge and discharge control device |
| CN105098926A (en) * | 2015-09-10 | 2015-11-25 | 桂林电子科技大学 | Intelligent charging system and charging method applied to power battery |
| JP2015213380A (en) * | 2012-09-03 | 2015-11-26 | 三洋電機株式会社 | Charger, method of charging secondary battery, and method of manufacturing secondary battery |
| CN205681144U (en) * | 2016-05-11 | 2016-11-09 | 广州供电局有限公司 | The modular combination power supply unit of Electric control and monitoring device |
| CN110474118A (en) * | 2019-07-09 | 2019-11-19 | 福建星云电子股份有限公司 | A kind of energy feedback type battery core series connection chemical conversion, partial volume test macro and method |
| CN210380337U (en) * | 2019-09-29 | 2020-04-21 | 张凡 | Charging chip supporting flexible input and output |
-
2020
- 2020-06-30 CN CN202010614791.2A patent/CN111799497B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241042A (en) * | 1998-05-27 | 2000-01-12 | 松下电器产业株式会社 | Accumulator charging method |
| CN1578051A (en) * | 2003-06-19 | 2005-02-09 | 三星电子株式会社 | Battery charger circuits using constant current/constant voltage mode and methods of operating the same |
| CN2672668Y (en) * | 2004-01-17 | 2005-01-19 | 沈阳新松机器人自动化股份有限公司 | Lithium power battery formation measuring and controlling device |
| CN200966004Y (en) * | 2006-07-17 | 2007-10-24 | 深圳市比克电池有限公司 | Battery charger |
| CN101814756A (en) * | 2010-04-12 | 2010-08-25 | 深圳市纳芯威科技有限公司 | Constant-current and constant-voltage control circuit, charging circuit and charger |
| CN102290846A (en) * | 2011-08-23 | 2011-12-21 | 广东金莱特电器股份有限公司 | Impedance type constant-voltage charging circuit with variable negative temperature coefficients |
| JP2015213380A (en) * | 2012-09-03 | 2015-11-26 | 三洋電機株式会社 | Charger, method of charging secondary battery, and method of manufacturing secondary battery |
| JP2015100235A (en) * | 2013-11-20 | 2015-05-28 | 富士通テレコムネットワークス株式会社 | Charge and discharge control device |
| CN105098926A (en) * | 2015-09-10 | 2015-11-25 | 桂林电子科技大学 | Intelligent charging system and charging method applied to power battery |
| CN205681144U (en) * | 2016-05-11 | 2016-11-09 | 广州供电局有限公司 | The modular combination power supply unit of Electric control and monitoring device |
| CN110474118A (en) * | 2019-07-09 | 2019-11-19 | 福建星云电子股份有限公司 | A kind of energy feedback type battery core series connection chemical conversion, partial volume test macro and method |
| CN210380337U (en) * | 2019-09-29 | 2020-04-21 | 张凡 | Charging chip supporting flexible input and output |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117792A (en) * | 2020-07-31 | 2020-12-22 | 西安交通大学 | A Model-Based Passive Equalization System and Equalization Current Estimation Method |
| CN112820962A (en) * | 2021-01-07 | 2021-05-18 | 广州擎天实业有限公司 | Constant voltage control method and system for lithium ion power battery series component capacity |
| CN112820962B (en) * | 2021-01-07 | 2022-02-22 | 广州擎天实业有限公司 | Constant voltage control method and system for lithium ion power battery series component capacity |
| CN113013511A (en) * | 2021-03-30 | 2021-06-22 | 时代一汽动力电池有限公司 | Battery series formation and capacity grading equipment |
| CN113060038A (en) * | 2021-04-22 | 2021-07-02 | 深圳市瑞能实业股份有限公司 | A series constant voltage charging system and method |
| WO2023035227A1 (en) * | 2021-09-10 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Battery formation apparatus, and control method and system for same |
| US11923712B2 (en) | 2021-09-10 | 2024-03-05 | Contemporary Amperex Technology Co., Limited | Battery charging and discharging controller device |
| CN114498853A (en) * | 2022-02-24 | 2022-05-13 | 上海类比半导体技术有限公司 | Series constant voltage charging system, method, electronic device and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111799497B (en) | 2022-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111799497B (en) | Battery formation system and battery formation method | |
| CN112332486B (en) | Active equalizing charging system of battery pack and control method thereof | |
| US20170288417A1 (en) | Fast Charging Apparatus and Method | |
| CN103094952B (en) | Control device, control method and control system | |
| CN102055216B (en) | Charging control method for battery of electric vehicle and equipment thereof | |
| CN108512280B (en) | Equalizing charge control method for series battery pack | |
| CN114825511B (en) | Charge-discharge balancing device with new energy automobile battery pack monitoring system | |
| US20130300346A1 (en) | Charge controlling system, charge controlling apparatus, charge controlling method and discharge controlling apparatus | |
| TWI492484B (en) | System﹑ management device and method for charging of battery | |
| CN109494771B (en) | New energy power smoothing control method based on super capacitor charge state prediction | |
| CN112768810A (en) | Pulse charge-discharge-based low-temperature rapid preheating method and control system for lithium ion battery | |
| US9608462B2 (en) | Control system, control apparatus, and control method | |
| WO2019042400A1 (en) | Battery equalization method and system, vehicle, storage medium, and electronic device | |
| US20130314022A1 (en) | Control system, control apparatus, and control method | |
| CN113675920B (en) | Load line loss compensation method and device for linear charging | |
| CN112564203A (en) | Active equalization control system for realizing flexible charging and discharging of power supply | |
| CN209526548U (en) | A kind of photovoltaic power generation apparatus of battery self-balancing quick charge coupling control | |
| US9257861B2 (en) | Control apparatus and control method | |
| CN119154462A (en) | Capacitive battery active equalization circuit and method thereof | |
| CN201887493U (en) | An electric vehicle battery charging control device | |
| CN118589667A (en) | Photovoltaic charging system and charging control method thereof | |
| CN115800422B (en) | Energy storage system and method for regulating an energy storage system | |
| CN109103955A (en) | Lead-acid accumulator equilibrium and monitoring method and system | |
| CN103560554A (en) | Electric quantity balancer for battery pack | |
| CN110867943B (en) | Photovoltaic automatic control equipment and method based on disturbance method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240816 Address after: 518101 Yongyihe Industrial Factory Building, Shuitian Road, Shilong Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province, China. Floors 10 and 11, 1106 and 1109 Patentee after: SHENZHEN XINWANGDA ELECTRIC TECHNOLOGY CO.,LTD. Country or region after: China Address before: 518000, 1st floor, 2nd floor, A-B area, 2nd floor, D area-9th floor, Yihe Road, Shiyan Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRONICS Co.,Ltd. Country or region before: China |