CN209913519U - Battery protection and charge-discharge management system architecture - Google Patents
Battery protection and charge-discharge management system architecture Download PDFInfo
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- CN209913519U CN209913519U CN201920333345.7U CN201920333345U CN209913519U CN 209913519 U CN209913519 U CN 209913519U CN 201920333345 U CN201920333345 U CN 201920333345U CN 209913519 U CN209913519 U CN 209913519U
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Abstract
The utility model discloses a battery protection and charge-discharge management system framework, include: the charging circuit comprises a voltage regulating circuit, a control circuit and a battery to be charged and discharged; the power supply end of the power supply is electrically connected with the voltage regulating circuit; the voltage regulating circuit is respectively electrically connected with the control circuit and two ends of the battery to be charged and discharged; the control circuit judges the charge-discharge state of the battery to be charged and discharged, adjusts the voltage regulating circuit according to the charge-discharge state, the voltage of the power supply end and the current voltage value of the battery to be charged and discharged, further establishes a corresponding battery charge-discharge and protection structure for the voltage regulating circuit according to the difference of anode and cathode protection control ends arranged in the battery charge-discharge control system. The utility model discloses in, solved among the prior art because use a plurality of switch tubes to carry out the electricity and connect in control circuit, cause the consumption too big to and the complicated problem of circuit structure.
Description
Technical Field
The utility model relates to a power supply technical field especially relates to a battery protection and charge-discharge management system framework.
Background
The chargeable and dischargeable battery pack discharges all chargeable and dischargeable batteries together when supplying power to the outside, and is integrally charged when charging, so that part of the chargeable and dischargeable batteries are overcharged and part of the chargeable and dischargeable batteries are overdischarged due to the individuation difference of the chargeable and dischargeable batteries, if the dischargeable batteries cannot be found in time, the service life of the chargeable and dischargeable batteries can be greatly shortened, the chargeable and dischargeable battery pack is scrapped in advance, and great waste is caused. Therefore, a control circuit and the like are arranged in a general chargeable and dischargeable battery pack to perform protection control, a charging circuit, a discharging circuit and a battery protection circuit are generally required in the conventional chargeable and dischargeable battery management circuit, and in the past scheme, the three circuits are separated, so that the circuit structure is not optimized, the cost is high, and the circuit loss is large;
as shown with reference to FIG. 13; at present, the traditional mode of battery management needs six switch MOS and two inductors to realize the functions of charging, discharging and protecting the battery core, and has complex structure and high cost. And once the design is finished, the boosting or reducing operation modes of the charging DC/DC and the discharging DC/DC are fixed, and the flexible configuration cannot be realized. In the whole charging or discharging loop, three MOS switches are connected with an inductor in series, so that the series impedance is increased, the loss is increased, the efficiency is low, and the heat generation is high.
Based on the technical problem who exists more than, the utility model provides a technical scheme who solves above technical problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery protection and charge-discharge management system framework the utility model discloses in only need just can realize prior art's technical scheme through 4 switch tubes, solved the too big problem of consumption, solved simultaneously because the too much problem of cost that causes of switch tube.
The utility model provides a technical scheme as follows:
a battery protection and charge-discharge management system architecture, comprising: a voltage regulating circuit, a control circuit; the power supply end of the power supply is electrically connected with the voltage regulating circuit; the voltage regulating circuit is electrically connected with the control circuit and two ends of the battery to be charged and discharged respectively; the control circuit judges the charge-discharge state of the battery to be charged and discharged, adjusts the voltage regulating circuit according to the charge-discharge state, the voltage of the power supply end and the current voltage value of the battery to be charged and discharged, further establishes a corresponding battery charge-discharge and protection structure for the voltage regulating circuit according to the difference of anode and cathode protection control ends arranged in the battery charge-discharge control system.
Further preferred, comprising: the voltage regulating circuit consists of 4 switching tubes, namely a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and 1 inductor; the corresponding control ends of the 4 switch tubes are respectively electrically connected with the control circuit; the common connection end of the first switch tube and the second switch tube is connected with one end of the inductor; the common connecting end of the third switching tube and the fourth switching tube is connected with the other end of the inductor; and the control circuit controls the working states of the first switch tube, the second switch tube, the third switch tube and the fourth switch, and adjusts the battery charging and discharging and protects the control structure.
The utility model solves the problems of excessive power consumption and complex circuit structure caused by the connection of a plurality of switch tubes in the control circuit in the prior art; the technical scheme of the prior art can be realized only by 4 switching tubes, so that the problem of overlarge power consumption is solved, and the problem of overhigh cost caused by the overlarge switching tubes is solved; the control system is more stable and reliable, the power consumption is reduced, and the service life is prolonged on the other hand.
Further preferred, comprising: the control circuit includes: the circuit comprises a signal feedback selector, an error amplifier, a PWM modulator, a detection signal comparator, a mode selection comparator, a logic control circuit and a decoder; the signal feedback selector is electrically connected with the input end of the error amplifier; the output end of the error amplifier is electrically connected with the signal input end of the PWM modulator; the current output end of the inductor to be detected is electrically connected with the signal input end of the PWM modulator; the signal regulation and control output end of the PWM modulator is electrically connected with the logic control circuit; the input end of the detection signal comparator is connected with a detection signal, the output end of the detection signal comparator is electrically connected with the signal input end of the logic control circuit, and the output end of the logic control circuit is electrically connected with the voltage regulating circuit; the mode selection comparator is connected with the detection end of the power supply end and the detection end of the battery to be charged and discharged respectively, and the output end of the mode selection comparator is electrically connected with the signal input end of the decoder; and the signal output end of the decoder is electrically connected with the signal control end of the logic control circuit.
Further preferred, comprising: the detection signal passes through the detection signal comparator and then outputs a comparison result to the logic control circuit; the decoder selects the charge-discharge state and the buck-boost mode of the battery to be charged and discharged, and sends the charge-discharge state and the buck-boost mode of the battery to be charged and discharged to the logic control circuit; the logic control circuit controls the working state of a switching tube in the voltage regulating circuit, the PWM modulator feeds back the detection information and the inductive current detection information through the error amplifier and regulates and controls the duty ratio of the output PWM wave, so that the voltage and the charging current at two ends of the battery to be charged and discharged and the voltage and the power supply current at two ends of the power supply are controlled.
Further preferred, comprising: when the battery to be charged and discharged is in a charging state; judging whether the power supply voltage at two ends of the power supply end of the power supply is greater than the rated voltage at two ends of the battery to be charged and discharged; when the voltage is larger than the preset voltage, the voltage regulating circuit is adjusted to be in a voltage reduction charging mode; the method specifically comprises the following steps: the first switch tube, the second switch tube and the inductor form a voltage reduction structure, the voltage reduction structure is controlled through control information sent by the control circuit, the power supply voltage at two ends of the power supply end of the power supply is subjected to voltage reduction processing, and the battery to be charged and discharged is charged after the power supply voltage is reduced; when the positive terminal protection structure of the battery charging and discharging control system is adopted, the third switching tube is in a normally-on state during charging, and the fourth switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply; when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the third switch tube is in a normally-off state, and the fourth switch is set to be in a normally-on state when being charged; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
Further preferred, comprising: when the battery to be charged and discharged is in a charging state; judging whether the power supply voltage at two ends of the power supply end of the power supply is greater than the rated voltage at two ends of the battery to be charged and discharged; when the voltage is not greater than the preset voltage, the voltage regulating circuit is adjusted to be in a boost charging mode; the method specifically comprises the following steps: the inductor, the third switching tube and the fourth switching tube form a boosting structure, the boosting structure is controlled through control information sent by the control circuit, power supply voltages at two ends of a power supply end of the power supply are boosted, and the battery to be charged and discharged is charged after the power supply voltages are boosted; when the positive terminal protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-on state during charging, and the second switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply; when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-off state, and the second switch is set to be in a normally-on state during charging; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
Further preferred, comprising: when the battery to be charged and discharged is in a discharging state; judging whether the voltage at two ends of the battery to be charged and discharged is greater than the voltage at two ends of the power supply end of the power supply;
when the voltage is larger than the preset voltage, the voltage regulating circuit is adjusted to be in a voltage reduction discharge mode;
the method specifically comprises the following steps: the inductor, the third switching tube and the fourth switching tube form a voltage reduction discharge structure, the voltage reduction discharge structure is controlled through control information sent by the control circuit, voltage reduction processing is carried out on the voltage at the two ends of the battery to be charged and discharged, and the voltage is loaded at the power supply end of the power supply; when the positive terminal protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-on state during discharging, and the second switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply; when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-off state, and the second switch is set to be in a normally-on state during discharging; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
Further preferred, comprising: when the battery to be charged and discharged is in a discharging state; judging whether the voltage at two ends of the battery to be charged and discharged is greater than the voltage at two ends of the power supply end of the power supply; when the voltage is not greater than the preset voltage, the voltage regulating circuit is adjusted to be in a boosting discharge mode; the method specifically comprises the following steps: the inductor, the first switch tube and the second switch tube form a boosting and discharging structure, the boosting and discharging structure is controlled through control information sent by the control circuit, the discharging voltage output by two ends of the battery to be charged and discharged is boosted, and the boosted and discharged voltage is loaded at the power supply end of the power supply; when the positive terminal protection structure of the battery charging and discharging control system is adopted, the third switching tube is in a normally-on state during discharging, and the fourth switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply; when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the third switch tube is in a normally-off state, and the fourth switch is set to be in a normally-on state when discharging; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
The utility model discloses in design a novel four switch list inductance battery charge, discharge and the trinity framework of battery protection, through the work of four switches of the nimble configuration of control circuit, can realize that the step-down fills the step-down and puts, and the step-down fills the step-up and puts, and the step-up fills the step-down and puts, and the step-up fills step-up and puts and battery protection.
The utility model provides a pair of battery protection and charge-discharge management system framework a battery protection and charge-discharge management system framework, beneficial effect as follows:
1. the utility model discloses in, found neotype voltage regulation control circuit simple structure, easily realize, it is more convenient to install.
2. Compared with the prior art, the utility model uses fewer components, and the components can realize the functions of the prior art, and simultaneously further save the cost; on the other hand, the power consumption is reduced, and the service life is prolonged.
3. The utility model discloses in, compare with prior art, under the condition that does not change the external circuit structure, can realize through the different mode of operation of control that the step-down fills step-down and puts, the step-down fills step-up and puts, steps up and fills step-down and put, steps up and fills step-up and put and battery protection, improved the adaptability of system.
Drawings
The above features, technical features, advantages and implementations of a battery protection and charge/discharge management system architecture will be further described in the following detailed description of preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.
Fig. 1 is a block diagram of one embodiment of a battery protection and charge-discharge management system architecture of the present invention;
fig. 2 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 3 is a block diagram of another embodiment of a battery protection and charging/discharging management system architecture according to the present invention;
fig. 4 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 5 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 6 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 7 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 8 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 9 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 10 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 11 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 12 is a block diagram of another embodiment of the battery protection and charge/discharge management system architecture of the present invention;
fig. 13 is a block diagram of another embodiment of a battery protection and charge/discharge management system architecture according to the present invention;
fig. 14 is a prior art block diagram of the present invention.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure of the product.
As shown in fig. 1, the present invention provides an embodiment of a battery protection and charging/discharging management system architecture, comprising: a voltage regulating circuit, a control circuit; the power supply end of the power supply is electrically connected with the voltage regulating circuit; the voltage regulating circuit is respectively and electrically connected with the power supply end of the power supply, the control circuit and two ends of the battery to be charged and discharged; the control circuit judges the charge-discharge state of the battery to be charged and discharged, adjusts the voltage regulating circuit according to the charge-discharge state, the voltage of the power supply end of the power supply and the current voltage value of the battery to be charged and discharged, further has different control frameworks according to the anode and cathode protection arranged in the battery charge-discharge control system, and constructs a corresponding battery charge-discharge and protection structure for the voltage regulating circuit.
Preferably, the voltage regulating circuit is composed of 4 switching tubes, namely a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and 1 inductor; the corresponding control ends of the 4 switching tubes are respectively electrically connected with the control circuit; the common connection end of the first switch tube and the second switch tube is connected with one end of the inductor; the common connecting end of the third switching tube and the fourth switching tube is connected with the other end of the inductor; and the control circuit controls the working states of the first switch tube, the second switch tube, the third switch tube and the fourth switch, and adjusts the battery charging and discharging and protects the control structure.
Specifically, in the present invention, in a control system for a rechargeable battery based on the prior art, in terms of hardware structure, the prior art is shown in fig. 13; generally, the device is provided with 3 parts of a charging DC/DC converter, a battery protection switch and a discharging DC/DC converter, and the arrangement mode has a complex structure and higher cost; in the whole charging or discharging loop, three MOS switches and an inductor are required to be connected in series, so that the series impedance is increased, the loss is increased, the efficiency is low, and the heat generation is high. In order to overcome the problems, the utility model is redesigned, on one hand, the battery can be charged and discharged; on the other hand, when the battery is in an abnormal state such as overvoltage, undervoltage and overcurrent, the current loop can be cut off through the switch, so that the protection management of the battery is realized; meanwhile, the switch connected with the anode of the battery can be used for protecting the anode end, and the switch connected with the cathode of the battery can also be used for protecting the cathode end. Referring to fig. 1 and 2, in the charging and discharging system of the battery, 4 operation modes are included, as shown in fig. 3 to 10; step-down charging, step-up charging, step-down discharging, step-up discharging and the like, the utility model discloses in constitute the voltage regulating circuit of charging and discharging through 4 switch tubes S11, S12, S21, S22 and 1 inductance L1; the utility model discloses in first switch tube, second switch tube, third switch tube, fourth switch tube correspond 4 switch tubes S11, S12, S21, S22 in the circuit diagram respectively, realize treating the charge-discharge control of charge-discharge battery through control circuit to and the control protection of positive and negative pole end, prevent excessive pressure, overflow, and the emergence of undervoltage phenomenon. Therefore the utility model discloses in the voltage according to power supply end both ends is different to and wait to fill the voltage difference at battery both ends, select the mode that corresponds, and to the control protection of positive negative pole. In the utility model, each electronic component is adjusted adaptively according to the requirements in use under the condition of meeting performance parameters; the switch tube can be a triode, an MOS tube, an IGBT and the like;
the utility model solves the problems of excessive power consumption and complex circuit structure caused by the connection of a plurality of switch tubes in the control circuit in the prior art; the technical scheme of the prior art can be realized only by 4 switching tubes, and the problems of overlarge power consumption and overhigh cost caused by the overlarge switching tubes are solved; the control system is more stable and reliable, the power consumption is reduced, and the service life is prolonged on the other hand.
The present invention also provides an embodiment, as shown in fig. 11; the control circuit includes: a signal feedback selector, an error amplifier EA, a PWM modulator, detection signal comparators (COMP 1-COMP 3), a mode selection comparator (COMP4), a logic control circuit and a decoder; the signal feedback selector is connected with the input end of the error amplifier EA; the output end of the error amplifier EA is connected with the signal input end of the PWM modulator; the current output end of the inductor to be detected is electrically connected with the signal input end of the PWM modulator; the signal regulation and control output end of the PWM modulator is electrically connected with the logic control circuit; the input ends of the detection signal comparators (COMP 1-COMP 3) are connected with detection signals, the output ends of the detection signal comparators (COMP 1-COMP 3) are electrically connected with the signal input end of the logic control circuit, and the output end of the logic control circuit is electrically connected with the voltage regulating circuit; the input end of a mode selection comparator (COMP4) is respectively and electrically connected with the detection end of the power supply end and the detection end of the battery to be charged and discharged, and the output end of the mode selection comparator is electrically connected with the signal input end of the decoder; the signal output end of the decoder is electrically connected with the signal control end of the logic control circuit.
Preferably, the method comprises the following steps: the detection signal passes through the detection signal comparator and then the output comparison result is input into the logic control circuit; the voltage detection signal of the power supply end and the battery to be charged and discharged is input into a mode selection comparator, the output signal of the mode selection comparator is input into a decoder, the charge and discharge state of the battery to be charged and discharged is selected through the decoder, and the charge and discharge state of the battery to be charged and discharged is sent to a logic control circuit; the logic control circuit controls the working state of a switching tube in the voltage regulating circuit, and the PWM demodulator regulates and controls the duty ratio of the output PWM wave through feedback detection error information and inductive current detection information I _ SNS output by the error amplifier so as to control the voltage at two ends of the battery to be charged and discharged and the voltage at two ends of the battery to be charged and discharged.
Specifically, in the present embodiment, refer to fig. 11; the signal to be detected and controlled selected by the signal feedback selector comprises voltages VA-VB at two ends of a power supply end of a power supply, voltages Vcella-VcellB at two ends of a battery to be charged and discharged and inductive current I _ SNS; sending the detected inductive current and an output signal of the error amplifier EA to a PWM modulator for duty ratio modulation, thereby controlling the states and on-off time of the four switching tubes, namely forming a reasonable working state meeting the requirements of the charge-discharge voltage regulation circuit; setting a maximum reference signal and a minimum reference signal in each detection signal comparator (COMP 1-COMP 3), comparing the obtained detection signals with the maximum reference signal and the minimum reference signal according to different charging and discharging modes, inputting a comparison result into a logic control circuit, carrying out logic operation, further constructing a battery protection structure, and respectively accessing the input end of a mode selection comparator (COMP4) to the voltage VA-VB at two ends of a power supply end and the voltage VcellA-VcellB at two ends of a battery to be charged and discharged for comparing the voltage and selecting a buck-boost working mode according to the comparison result; if the voltage VA-VB at the two ends of the power supply end of the power supply is greater than the voltage VcellA-VcellB at the two ends of the battery to be charged and discharged, the step-down charging or the step-up discharging is selected; if the voltage VA-VB at the two ends of the power supply end of the power supply is less than the voltage VcellA-VcellB at the two ends of the battery to be charged and discharged, boosting the voltage for charging or reducing the voltage for discharging; and selecting a charge-discharge mode through a decoder, sending the obtained working mode to a logic control circuit, and controlling the corresponding switching tube to be in a normally open or normally closed working state and a duty ratio modulation working state.
The present invention also provides an embodiment, as shown in fig. 3 and 4; the method comprises the following steps: when the battery to be charged and discharged is in a charging state; judging whether the power supply voltage at two ends of the power supply end of the power supply is greater than the rated voltage at two ends of the battery to be charged and discharged; when the voltage is larger than the preset voltage, the voltage regulating circuit is adjusted to be in a voltage reduction charging mode; the method specifically comprises the following steps: the working states of the first switch tube, the second switch tube, the third switch tube and the fourth switch are controlled through the control circuit; the first switch tube, the second switch tube and the inductor form a voltage reduction DC/DC structure, the voltage reduction DC/DC structure is controlled through control information sent by the control circuit, the power supply voltage at two ends of a power supply end of a power supply is subjected to voltage reduction processing, and a battery to be charged and discharged is charged after the power supply voltage is reduced; when the positive end protection structure is adopted, the third switch tube is in a normally-on state during charging, and the fourth switch is set to be in a normally-off state; when the negative end protection structure is adopted, the third switch tube is in a normally-off state, and the fourth switch is set to be in a normally-on state during charging.
Specifically, the present embodiment is a step-down charging mode; as shown with reference to fig. 3 and 4; the voltage VA-VB at two ends of a power supply end of the power supply, and the voltage VcellA-VcellB at two ends of a battery to be charged and discharged; particularly, a step-down DC/DC switch structure is formed by step-down DC/DC charging and S11 and S12; when the positive terminal protection structure is adopted, the S21 is always conducted during charging, and the S11 and the S21 are turned off together to realize bidirectional blocking of Vcella and VA as a protection function; s22 is in a normally off state.
When the negative terminal protection structure is adopted, S22 is always conducted during charging, and S12 and S22 are turned off together to realize bidirectional blocking of VcellB and VB as a protection function; s21 is in a normally off state.
The present invention also provides an embodiment, as shown in fig. 5 and 6; the method comprises the following steps: when the battery to be charged and discharged is in a charging state; judging whether the power supply voltage at two ends of the power supply end of the power supply is greater than the rated voltage at two ends of the battery to be charged and discharged; when the voltage is not greater than the preset voltage, the voltage regulating circuit is adjusted to be in a boost charging mode; the method specifically comprises the following steps: the working states of the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are controlled through the control circuit; the inductor, the third switching tube and the fourth switching tube form a boosting DC/DC structure, the boosting DC/DC structure is controlled through control information sent by the control circuit, power supply voltages at two ends of a power supply end of the power supply are boosted, and a battery to be charged and discharged is charged after the power supply voltages are boosted; when the positive terminal protection structure is adopted, the first switch tube is in a normally-on state during charging, and the second switch is set to be in a normally-off state; when the negative end protection structure is adopted, the first switch tube is in a normally-off state, and the second switch is set to be in a normally-on state during charging.
Specifically, the present embodiment is a boost charging mode; as shown with reference to fig. 5 and 6; the voltage VA-VB at two ends of a power supply end of the power supply, and the voltage VcellA-VcellB at two ends of a battery to be charged and discharged; specifically, through boost DC/DC charging, S21 and S22 form a boost DC/DC switch structure; when the positive terminal protection structure is adopted, the S11 is always conducted during charging, and the S11 and the S21 are turned off together to realize bidirectional blocking of Vcella and VA as a protection function; s12 is in a normally off state.
When the negative terminal protection structure is adopted, S12 is always conducted during charging, and S12 and S22 are turned off together to realize bidirectional blocking of VcellB and VB as a protection function; s11 is in a normally off state.
The present invention also provides an embodiment, as shown in fig. 7 and 8; the method comprises the following steps: when the battery to be charged and discharged is in a discharging state; judging whether the voltage at two ends of the battery to be charged and discharged is greater than the voltage at two ends of the power supply end of the power supply; when the voltage is larger than the preset voltage, the voltage regulating circuit is adjusted to be in a voltage reduction discharge mode; the method specifically comprises the following steps: the working states of the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are controlled through the control circuit; the inductor, the third switching tube and the fourth switching tube form a voltage reduction discharge structure, the voltage reduction discharge structure is controlled through control information sent by the control circuit, voltage reduction processing is carried out on the voltage at the two ends of the battery to be charged and discharged, and the voltage is loaded at the power supply end of the power supply; when the positive end protection structure is adopted, the first switch tube is in a normally-on state during discharging, and the second switch is set to be in a normally-off state; when the negative end protection structure is adopted, the first switch tube is in a normally-off state, and the second switch is set to be in a normally-on state during discharging.
Specifically, the present embodiment is a step-down discharge mode; shown with reference to fig. 7 and 8; the voltage VA-VB at two ends of a power supply end of the power supply, and the voltage VcellA-VcellB at two ends of a battery to be charged and discharged; particularly, a step-down DC/DC switch structure is formed by step-down DC/DC discharge S21 and S22; when the positive terminal protection structure is adopted, the S11 is normally on during discharging, and the S11 and the S21 are turned off together to realize bidirectional blocking of Vcella and VA as a protection function; s12 is in a normally off state.
When a negative end protection structure is adopted, S12 is normally on during discharging, and S12 and S22 are turned off together to realize bidirectional blocking of VcellB and VB as a protection function; s11 is in a normally off state.
The present invention also provides an embodiment, as shown with reference to fig. 9 and 10; the method comprises the following steps: when the battery to be charged and discharged is in a discharging state; judging whether the voltage at two ends of the battery to be charged and discharged is greater than the voltage at two ends of the power supply end of the power supply; when the voltage is not greater than the preset voltage, the voltage regulating circuit is adjusted to be in a boosting discharge mode; the method specifically comprises the following steps: the working states of the first switch tube, the second switch tube, the third switch tube and the fourth switch are controlled through the control circuit; the inductor, the first switching tube and the second switching tube form a boost discharge DC/DC structure, the boost discharge DC/DC structure is controlled through control information sent by the control circuit, the discharge voltage output by two ends of the battery to be charged and discharged is boosted and loaded at the power supply end of the power supply; when the positive terminal protection control framework is adopted, the third switch tube is in a normally-on state during discharging, and the fourth switch is set to be in a normally-off state; when the negative end protection control framework is adopted, the third switch tube is in a normally-off state, and the fourth switch is set to be in a normally-on state when discharging.
Specifically, the present embodiment is a boost discharge mode; as shown with reference to fig. 9 and 10; the voltage VA-VB at two ends of a power supply end of the power supply, and the voltage VcellA-VcellB at two ends of a battery to be charged and discharged; particularly, a boosting DC/DC switch structure is formed by S11 and S12 through boosting DC/DC discharge; when the positive terminal protection structure is adopted, the S21 is normally on during discharging, and the S11 and the S21 are turned off together to realize bidirectional blocking of Vcella and VA as a protection function; s22 is in a normally off state.
When a negative end protection structure is adopted, S22 is normally on during discharging, and S12 and S22 are turned off together to realize bidirectional blocking of VcellB and VB as a protection function; s21 is in a normally off state.
In the present invention, fig. 12 and 13 are structural diagrams of detection points provided for detecting signals.
The utility model discloses in design a novel four switch list inductance battery charge, discharge and the trinity framework of battery protection, through the work of four switches of the nimble configuration of control circuit, can realize that the step-down fills the step-down and puts, and the step-down fills the step-up and puts, and the step-up fills the step-down and puts, and the step-up fills step-up and puts and battery protection.
In addition, in the embodiments of the present invention, 4 kinds of circuit structures are constructed, and the control terminals (positive and negative electrodes) are different, and are marked by thick lines with relatively heavy colors in fig. 3 to 10.
The utility model discloses a can form integrated chip in battery protection and charge-discharge management system framework, its inside switch tube can be MOS pipe, perhaps BJT pipe etc..
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A battery protection and charge-discharge management system architecture, comprising: the charging circuit comprises a voltage regulating circuit, a control circuit and a battery to be charged and discharged;
the power supply end of the power supply is electrically connected with the voltage regulating circuit;
the voltage regulating circuit is electrically connected with the control circuit and two ends of the battery to be charged and discharged respectively;
the control circuit judges the charge-discharge state of the battery to be charged and discharged, adjusts the voltage regulating circuit according to the charge-discharge state, the voltage of the power supply end and the current voltage value of the battery to be charged and discharged, further protects the control end differently according to the anode and the cathode arranged in the battery charge-discharge control system, and establishes a corresponding battery charge-discharge and protection structure according to the voltage regulating circuit.
2. The battery protection and charge/discharge management system architecture of claim 1, comprising:
the voltage regulating circuit consists of 4 switching tubes, namely a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and 1 inductor;
the corresponding control ends of the 4 switch tubes are respectively electrically connected with the control circuit;
the common connection end of the first switch tube and the second switch tube is connected with one end of the inductor;
the common connecting end of the third switching tube and the fourth switching tube is connected with the other end of the inductor;
and the control circuit controls the working states of the first switch tube, the second switch tube, the third switch tube and the fourth switch, and adjusts the battery charging and discharging and protects the control structure.
3. The battery protection and charge/discharge management system architecture of claim 2, wherein the control circuit comprises: the circuit comprises a signal feedback selector, an error amplifier, a PWM modulator, a detection signal comparator, a mode selection comparator, a logic control circuit and a decoder;
the signal feedback selector is electrically connected with the input end of the error amplifier; the output end of the error amplifier is electrically connected with the signal input end of the PWM modulator; the current output end of the inductor to be detected is electrically connected with the signal input end of the PWM modulator; the signal regulation and control output end of the PWM modulator is electrically connected with the logic control circuit;
the input end of the detection signal comparator is connected with a detection signal, the output end of the detection signal comparator is electrically connected with the signal input end of the logic control circuit, and the output end of the logic control circuit is electrically connected with the voltage regulating circuit;
the mode selection comparator is connected with the detection end of the power supply end and the detection end of the battery to be charged and discharged respectively, and the output end of the mode selection comparator is electrically connected with the signal input end of the decoder;
and the signal output end of the decoder is electrically connected with the signal control end of the logic control circuit.
4. The battery protection and charge/discharge management system architecture of claim 3, comprising:
the detection signal passes through the detection signal comparator and then outputs a comparison result to the logic control circuit; the decoder selects the charge-discharge state and the buck-boost mode of the battery to be charged and discharged, and sends the charge-discharge state and the buck-boost mode of the battery to be charged and discharged to the logic control circuit; the logic control circuit controls the working state of a switching tube in the voltage regulating circuit, and the PWM modulator regulates and controls the duty ratio of output PWM waves through detection information fed back by the error amplifier and inductive current detection information, so as to control the voltage and the charging current at two ends of the battery to be charged and discharged and the voltage and the power supply current at two ends of the power supply.
5. The battery protection and charge/discharge management system architecture of claim 2, comprising:
when the battery to be charged and discharged is in a charging state; judging whether the power supply voltage at two ends of the power supply end of the power supply is greater than the rated voltage at two ends of the battery to be charged and discharged;
when the voltage is larger than the preset voltage, the voltage regulating circuit is adjusted to be in a voltage reduction charging mode;
the method specifically comprises the following steps: the first switch tube, the second switch tube and the inductor form a voltage reduction structure, the voltage reduction structure is controlled through control information sent by the control circuit, the power supply voltage at two ends of the power supply end of the power supply is subjected to voltage reduction processing, and the battery to be charged and discharged is charged after the power supply voltage is reduced;
when the positive terminal protection structure of the battery charging and discharging control system is adopted, the third switching tube is in a normally-on state during charging, and the fourth switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply;
when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the third switch tube is in a normally-off state, and the fourth switch is set to be in a normally-on state when being charged; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
6. The battery protection and charge/discharge management system architecture of claim 2, comprising:
when the battery to be charged and discharged is in a charging state; judging whether the power supply voltage at two ends of the power supply end of the power supply is greater than the rated voltage at two ends of the battery to be charged and discharged;
when the voltage is not greater than the preset voltage, the voltage regulating circuit is adjusted to be in a boost charging mode;
the method specifically comprises the following steps: the inductor, the third switching tube and the fourth switching tube form a boosting structure, the boosting structure is controlled through control information sent by the control circuit, power supply voltages at two ends of a power supply end of the power supply are boosted, and the battery to be charged and discharged is charged after the power supply voltages are boosted;
when the positive terminal protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-on state during charging, and the second switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply;
when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-off state, and the second switch is set to be in a normally-on state during charging; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
7. The battery protection and charge/discharge management system architecture of claim 2, comprising:
when the battery to be charged and discharged is in a discharging state; judging whether the voltage at two ends of the battery to be charged and discharged is greater than the voltage at two ends of the power supply end of the power supply;
when the voltage is larger than the preset voltage, the voltage regulating circuit is adjusted to be in a voltage reduction discharge mode;
the method specifically comprises the following steps: the inductor, the third switching tube and the fourth switching tube form a voltage reduction discharge structure, the voltage reduction discharge structure is controlled through control information sent by the control circuit, voltage reduction processing is carried out on the voltage at the two ends of the battery to be charged and discharged, and the voltage is loaded at the power supply end of the power supply;
when the positive terminal protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-on state during discharging, and the second switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply;
when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the first switch tube is in a normally-off state, and the second switch is set to be in a normally-on state during discharging; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
8. The battery protection and charge/discharge management system architecture of claim 2, comprising:
when the battery to be charged and discharged is in a discharging state; judging whether the voltage at two ends of the battery to be charged and discharged is greater than the voltage at two ends of the power supply end of the power supply;
when the voltage is not greater than the preset voltage, the voltage regulating circuit is adjusted to be in a boosting discharge mode;
the method specifically comprises the following steps: the inductor, the first switch tube and the second switch tube form a boosting and discharging structure, the boosting and discharging structure is controlled through control information sent by the control circuit, the discharging voltage output by two ends of the battery to be charged and discharged is boosted, and the boosted and discharged voltage is loaded at the power supply end of the power supply;
when the positive terminal protection structure of the battery charging and discharging control system is adopted, the third switching tube is in a normally-on state during discharging, and the fourth switch is set to be in a normally-off state; the first switch and the third switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply;
when the negative electrode end protection structure of the battery charging and discharging control system is adopted, the third switch tube is in a normally-off state, and the fourth switch is set to be in a normally-on state when discharging; and the second switch and the fourth switch are turned off simultaneously to form a bidirectional blocking structure of the battery to be charged and discharged and the power supply end of the power supply.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109888875A (en) * | 2019-03-16 | 2019-06-14 | 曾宪伟 | A kind of battery protection and management of charging and discharging system architecture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109888875A (en) * | 2019-03-16 | 2019-06-14 | 曾宪伟 | A kind of battery protection and management of charging and discharging system architecture |
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