Rechargeable battery charging control system and new energy automobile
By introducing a constant voltage and constant current module into the charging control system of the charging battery, the constant current and constant voltage control of the charging output module is achieved by using the constant current loop circuit and the constant voltage loop circuit, the problems of low accuracy of the DC output current and voltage of the charger and insufficient overcharge protection are solved, which significantly reduces the occurrence of charging faults and extends the battery life.
Patent Information
- Application Number
- CN202420891229.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The accuracy of DC output current and voltage of existing chargers is not high, the charging ignition control is not accurate, and the overcharge protection is not in place, resulting in frequent charging failures.
A charging control system for charging batteries is designed, including a constant voltage and constant current module, a charging driving module and a charging output module. The constant current and constant voltage control of the charging output module is realized through the constant current loop circuit and the constant voltage loop circuit respectively.
Improve the accuracy of the DC output current and voltage of the charger, ensure that the charging overcharge protection is in place, reduce the occurrence of charging failures, and extend battery life.
Smart Images
Figure CN222756437U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of new energy vehicles, and specifically relates to a rechargeable battery charging control system and a new energy vehicle. Background Art
[0002] The new energy on-board charger (OBC) is an energy conversion device that is fixedly installed on electric vehicles and controls and adjusts the charging of the vehicle's power battery. The new energy on-board charger has the ability to safely and automatically charge the power battery of an electric vehicle. It dynamically adjusts the charging current and voltage parameters based on the data provided by the battery management system (BMS), converts civilian single-phase AC power (220V) into DC power, and charges the power battery. The on-board charger consists of two major parts: the voltage conversion part and the charger control motherboard. Among them, the main function of the power supply part is to convert 220V AC power into DC power; the charger control motherboard is mainly used to control, monitor, calculate, correct, protect the power supply part, and communicate with the outside world through the network. It is the "central brain" of the on-board charger.
[0003] In the prior art, the DC output current and voltage of the charger are not accurate, the charger cannot accurately control the voltage and current during charging, and the overcharge protection is not in place, which makes charging failures prone to occur. Therefore, how to improve the accuracy of the DC output current and voltage of the charger, ensure overcharge protection, and reduce the occurrence of charging failures has become an urgent problem to be solved. Utility Model Content
[0004] The purpose of one or more embodiments of this specification is to provide a rechargeable battery charging control system and a new energy vehicle, improve the accuracy of the DC output current and voltage of the charger, provide overcharge protection, and reduce the occurrence of charging failures.
[0005] To solve the above technical problems, one or more embodiments of this specification are implemented as follows:
[0006] In the first aspect, an embodiment of the utility model provides a rechargeable battery charging control system, including a constant voltage and constant current module, a charging drive module and a charging output module, wherein the charging drive module drives the charging output module to output direct current to the rechargeable battery, and the constant voltage and constant current module enables the charging output module to output direct current with constant voltage and constant current, and the constant voltage and constant current module includes a constant current loop circuit, a constant voltage loop circuit and a fan control circuit, and the constant current loop circuit and the constant voltage loop circuit respectively realize constant current and constant voltage control of the charging output module.
[0007] In a second aspect, an embodiment of the utility model provides a new energy vehicle, comprising a rechargeable battery charging control system as described above.
[0008] It can be seen from the technical solutions provided by one or more embodiments of the above specification that in the rechargeable battery charging control system provided by the embodiment of the utility model, the charging drive module drives the charging output module to output direct current to the rechargeable battery, and the constant voltage and constant current module realizes that the charging output module outputs direct current with constant voltage and constant current. The constant voltage and constant current module includes a constant current loop circuit and a constant voltage loop circuit. The constant current loop circuit and the constant voltage loop circuit respectively realize constant current and constant voltage control for the charging output module. The main characteristic of the constant current loop circuit is that the output current will not change the set value of the charging current with external factors, and the current is kept constant. The main characteristic of the constant voltage loop circuit is that the output voltage will not change the output voltage characteristics with external factors, and the output voltage is kept stable. The circuit architecture of the constant current and constant voltage module of the entire rechargeable battery charging control system is simple, which improves the precise control of the output voltage and current value of the charging ignition of the new energy vehicle battery, improves work efficiency, and can also ensure that the battery charging will not be overcharged, which can extend the battery life. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the description of one or more embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0010] Figure 1 It is a partial circuit schematic diagram of a rechargeable battery charging control system provided according to an embodiment of the utility model.
[0011] Figure 2 It is another circuit schematic diagram of a rechargeable battery charging control system provided according to an embodiment of the utility model. DETAILED DESCRIPTION
[0012] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below in conjunction with the drawings in one or more embodiments of this specification. Obviously, the one or more embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on one or more embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this document.
[0013] The rectifier circuit of the rechargeable battery charging control system provided by the embodiment of the utility model is simple, improves the accuracy of the DC output current and voltage of the charger, provides overcharge protection, and reduces the occurrence of charging failures. The rechargeable battery charging control system and its various parts provided by this specification will be described in detail below.
[0014] Example 1: Reference Figure 1 As shown, a rechargeable battery charging control system provided by an embodiment of the utility model includes a constant voltage and constant current module, a charging drive module and a charging output module. The charging drive module drives the charging output module to output direct current to the rechargeable battery. The constant voltage and constant current module enables the charging output module to output direct current with constant voltage and constant current. The constant voltage and constant current module includes a constant current loop circuit and a constant voltage loop circuit. The constant current loop circuit and the constant voltage loop circuit respectively realize constant current and constant voltage control of the charging output module.
[0015] Optionally, the rechargeable battery charging control system provided by the embodiment of the utility model, the constant current loop circuit includes: 1 light emitting diode P8A, 1 transistor Q33, 4 comparators U9A, U9B, U141A, U141B, 10 capacitors C43, C50, C46, C162, C160, C157, C158, C164, C54, C55, 19 resistors R109, R110, R106, R105, R107, R112, R113, R180, R65, R67, R20, R154, R155, R96, R5, R156, R104, R64, R97, one end of the light emitting diode P8A is connected to the collector of the transistor Q33 The output end of the comparator U9B is connected to the base of the transistor Q33 via the resistor R107, one end of the resistor R180 and the capacitor C46 connected in parallel is connected to the base of the transistor Q33 and the other end is grounded, one end of the resistor R105 is connected to the output end of the comparator U9B, the other end of the resistor R105 is connected to the + input end of the comparator U9B, one end of the capacitor C50 is connected to the + input end of the comparator U9B and the other end is grounded, one end of the capacitor C43 and the resistor R110 connected in parallel is connected to the - input end of the comparator U9B and the other end is grounded, one end of the resistor R109 and the resistor R112 connected in series is connected to the output end of the comparator U9B and the other end is connected to the + input end of the comparator U9B, and the resistor R106 is connected to the output end of the comparator U9B and the other end is connected to the + input end of the comparator U9B. , resistor R155, and capacitor C160 are connected in series, one end of which is connected to the -input of comparator U9B and the other end is connected to the +input of comparator U141B. Capacitor C162, resistor R65, and resistor R67 are connected in parallel, one end of which is connected to the +input of comparator U141B and the other end is connected to the emitter of transistor Q33. Capacitor C157, resistor R64, and capacitor C158 are connected in series, one end of which is connected in parallel to the -input of comparator U141B and the other end is connected to the output of comparator U141B. One end of resistor R113 is connected to sensing diode P8A and the other end is connected to pin 8 of comparator U9A. The +input of comparator U9A is connected to the output of comparator U9A. Resistor One end of R20 is connected to the +input terminal of comparator U141B and the other end thereof is connected to the 8th pin of comparator U9A, one end of resistors R154 and R155 are connected in parallel to the output terminal of comparator U141A and the other end thereof is connected to the +input terminal of comparator U141B, resistors R97, R96, R5 and R156 are connected in series to the +input terminal of comparator U141A and the other end thereof is grounded, one end of resistor C55 is connected between resistor R96 and resistor R5 and then to ground, one end of capacitor C54 is connected between resistor R5 and resistor R156 and then to ground, one end of resistor R104 and capacitor C164 are connected in parallel to the +input terminal of comparator U141A and the other end thereof is grounded.
[0016] The magnitude of the output current is determined by the voltage drop across resistor R109A to determine its precise value. The voltage drop information generated by the current is transmitted by resistors R109A and R110, and then passed through the second-order filter circuit of R156, R5, C55, and C54 to the comparator U141A. The purpose of comparator U141A controlling the emitter potential of transistor Q3 is to control the operating current of optocoupler P8A, so that the operating voltage of optocoupler P8A can be controlled to determine the output current, which can improve the accuracy of the output current by about 10%.
[0017] Optionally, the rechargeable battery charging control system provided by the embodiment of the utility model, the constant voltage loop circuit includes: 1 induction diode P2A, 1 diode group D6, 3 comparators U3, U140B, U140A, 13 capacitors C5, C7, C266, C268, C269, C151, C159, C149, C148, C40, C58, C57, C56, 21 resistors R23, R266, R267, R143, R24, R153, R155, R144, R145, R68, R448, R109, R8, R142, R46, R47, R100, R111, R99, R98, R103, one end of the capacitor C5 is connected to the comparator The other end of the line is connected to the - input terminal of the comparator U3 and then to the + input terminal of the comparator U3. The resistor R23 and the resistor R155 are connected to the - input terminal of the comparator U141B. One end of the capacitor C7 is connected between the resistor R23 and the resistor R155 and then to ground. One end of the series connection of the resistor R266 and the capacitor C268 is connected between the resistor R23 and the resistor R155 and then to ground. One end of the series connection of the resistor R267 and the capacitor C269 is connected to the power supply circuit and then to ground. One end of the parallel connection of the capacitor C159 and the resistor R68 is connected to the - input terminal of the comparator U141B and then to ground. One end of the parallel connection of the resistor R109, the capacitor C40 and the capacitor C148 is connected to the output terminal of the comparator U140B. The other end of the resistor R448 is connected to the power supply circuit and the other end of the resistor R448 is connected to the -input of the comparator U141B. The other end of the capacitor C149 is connected to the -input of the comparator U141B and the other end of the capacitor C149 is connected to the +input of the comparator U141B. The resistor R24, the resistor R153 and the capacitor C151 are connected in parallel to the +input of the comparator U141B and the other end of the resistor R143 is connected to the power supply circuit and the other end of the resistor R143 is connected to the +input of the comparator U141B. The resistors R144 and R145 are connected in parallel to the output of the comparator U141B and the other end of the resistor R144 is connected to the -input of the comparator U141A. One end of resistor R98, resistor R99, resistor R100, and resistor R111 are connected to the + input terminal of comparator U141B and the other end thereof are grounded, one end of capacitor C56 is connected to the + input terminal of comparator U141B and then grounded, one end of capacitor C57 is connected to the + input terminal of comparator U141B and then grounded, one end of capacitor C58 is connected to the + input terminal of comparator U141B and then grounded, one end of resistor R8, diode group D6 and resistor R142 are connected in series to the output terminal of comparator U140B and the other end thereof is connected to the output terminal of comparator U141B, one end of light emitting diode P2A is connected in parallel with resistor R47 to pin 4 of comparator U141A and the other end thereof is connected to diode group D6.
[0018] The fan control circuit includes: 1 chip U261, 1 capacitor Y3, 1 optocoupler P6B, 2 light-emitting diodes P5A, P7A, 3 capacitors C271, C272, C267, 6 resistors R62, R31, R5, R74, R6, R265, wherein the light-emitting diode P7A and the resistor R31 are connected in parallel and connected to the C2 port of the chip U261 via the resistor R5, the light-emitting diode P5A and the resistor R62 are connected in parallel and connected to the A0 port of the chip U261 via the resistor R6, and one end of the resistor R74 is connected to the A1 port of the chip U261. The other end is grounded after the optocoupler P6B's 4th pin is connected to the power supply circuit, the 3rd pin of the optocoupler P6B is connected to the A1 port of the chip U261, the capacitor C271 is connected to the RA4 port of the chip U261, the capacitor C272 is connected to the RA3 port of the chip U261, the capacitor Y3 is connected between the RA4 port of the chip U261 and the RA3 port of the chip U261, one end of the series resistor R265 and the capacitor C267 is connected to the power supply circuit and the other end is grounded, the A2 port of the chip U261 is connected between the resistor R265 and the capacitor C267. There is a power fan outside the OBC, and the power fan control is through the 9th pin of the microcontroller U261. When the temperature is high, the 13th pin of U261 outputs the control signal that the power fan starts to work.
[0019] The voltage information is transmitted to the A2 port of the chip U261 through the resistor R265 after forming a voltage divider circuit through the resistor R6 and the resistor R62. After the internal operation of the 8-bit single-chip microcomputer of the chip U261 PIC16F1823, the voltage information is output through the C5 port to the third-order pass filter of the resistor R100, the resistor R99, the resistor R98, the capacitor C58, the capacitor C57 and the capacitor C56 to the comparator U140A. The voltage output by the comparator U140A determines the voltage value output by the comparator U140B. The voltage output value of U140B determines the conduction current of the optocoupler P2A. At this time, the working current of the optocoupler P2A determines the working frequency of the MOS tube in the charging output module, so that the accuracy of the output voltage is about 1%, so as to realize the precise control of the charging ignition voltage output by the charging control system, ensure that the battery will not be overcharged, prolong the battery life and improve the working efficiency.
[0020] Alternatively, if Figure 2As shown, in the charging control system of the rechargeable battery provided by the embodiment of the utility model, the charging output module adopts a full-bridge rectifier unit for current rectification, and the full-bridge rectifier unit includes: 1 half-bridge excitation inductor L4, 1 main high-frequency transformer T1 / T2, 1 capacitor C27, 1 differential mode inductor T70 and 5 diodes D1, D3, D7, D9, D10, one end of the half-bridge excitation inductor L4 is connected to the charging drive module, and the other end of the half-bridge excitation inductor L4 is connected to the first end of the main high-frequency transformer T1 / T2, and the diodes D1, D3, D7, D9 and D10 are connected in series. The non-grounded end of the main high-frequency transformer T1 / T2 connected in parallel with the diode D9 and the diode D10 in series is connected to one end of the diode D7 via the differential mode inductor T70, and the other end of the diode D7 is connected to the positive output end of the charging output module. The capacitor C27 is connected in parallel with the diode D1 and the diode D3 in series, wherein the third end and the fourth end of the main high-frequency transformer T1 / T2 are connected, the fifth end of the main high-frequency transformer T1 / T2 is connected between the diode D9 and the diode D10, and the fourth end of the main high-frequency transformer T1 / T2 is connected between the diode D1 and the diode D3.
[0021] Among them, inductor L4 is a half-bridge excitation inductor, the main high-frequency transformer T1 / T2 plays the role of isolation and energy storage conversion, inductor T70 outputs differential mode inductor, and the structure of the full-bridge rectifier unit is simple, which enables the charging output module to output stable DC power, and reduces the failure rate of the charging process by more than 20%.
[0022] Optionally, in the charging control system of the rechargeable battery provided by the embodiment of the utility model, the charging output module also includes an output balancing capacity storage absorption circuit and a resonant circuit, wherein the output balancing capacity storage absorption circuit includes: 2 capacitors C41 and C65, 4 resistors R30, R38, R39, and R40, and the non-grounded end of the series-connected capacitors C41 and C65 and the series-connected resistors R30, R38, R39, and R40 are connected in parallel to one end of the diode D7. The resonant circuit includes: 2 diodes D17 and D18, 4 capacitors C39, C24, C78, and C42, and the non-grounded end of the series-connected diodes D17 and D18 and the series-connected capacitors C39, C24, C78, and C42 are connected in parallel to one end of the diode D7. The function of the resonant circuit is to adjust the duty cycle of the MOS tube through the amplitude of the resonance, and change the output voltage and current of the MOS tube.
[0023] Optionally, in the rechargeable battery charging control system provided by the embodiment of the utility model, the charging output module also includes an output voltage regulation circuit and a charging constant current detection circuit, wherein the output voltage regulation circuit includes: 1 capacitor C71, 5 resistors R62, R57, R63, R61, R60, and the non-grounded ends of the capacitor C71, resistor R62, and resistor R57 in parallel are connected to resistors R63, R61, and R60 in sequence and then connected to one end of the diode D7. The function implemented by the output voltage regulation circuit is to output a 5V power voltage for user use. The charging constant current detection circuit includes: 2 diodes D86, D87, 3 resistors D10, R110, and R109, wherein the resistor R10, the parallel diodes D86, D87, the resistor R110, and the resistor R109 are connected in series in sequence and connected to the negative output terminal. Resistor R109 is a constant current detection resistor, which can set the upper limit value of the charging current.
[0024] Optionally, in the rechargeable battery charging control system provided by the embodiment of the utility model, the charging output module also includes an input current transfer loop and an output voltage stabilizing circuit, wherein the input current transfer loop includes: 1 current transformer L1A, 1 capacitor C53, 3 resistors R29, R72, R734 diodes D72, D73, D74, D75, wherein one end of the current transformer L1A is connected to the second end of the main high-frequency transformer T1 / T2, the series-connected diode D75, diode D74 and the series-connected diode D73, diode D72, resistor R72 and resistor R73 are connected in parallel to the power supply circuit T11, T12, one end of the capacitor C53 and the resistor R29 connected in series is connected between the diode D75 and the diode D74, and the other end of the capacitor C53 and the resistor R29 connected in series is connected between the diode D73 and the diode D72. Resistor R29 and capacitor C53 form an RC absorption circuit, inductor L1A is a current transformer, and diode D75, diode D74, diode D72, diode D73, resistor R72, and resistor R73 form a working current information transmission loop during the charging process, thereby improving the current detection accuracy by more than 10%.
[0025] The output voltage stabilizing circuit includes: 2 capacitors C43 and C75, and 10 resistors R75, R74, R77, R76, R78, R49, R42, R56, R48, and R45. Among them, the capacitor R71, the resistor R75, and the resistor R74 are connected in parallel with the resistor R77, the resistor R76, and the resistor R78 are connected in series to form a first protection unit, and the capacitor C43, the resistor R49, and the resistor R42 are connected in series with the resistor R45, the resistor R48, and the resistor R56 are connected in series to form a second protection unit. One end of the first protection unit and the second protection unit after being connected in parallel is connected to the other end of the diode D7, and one end of the first protection unit and the second protection unit after being connected in parallel is connected to the power supply circuit.
[0026] Optionally, in the rechargeable battery charging control system provided by the embodiment of the utility model, the charging drive module includes an upper half-bridge tube drive unit and a lower half-bridge tube drive unit, and the upper half-bridge tube drive unit and the lower half-bridge tube drive unit jointly drive the charging output module, and the upper half-bridge tube drive unit includes: 1 MOS tube Q3, 2 transistors Q75, Q77, 2 diodes D19, D22, 3 capacitors C62, C92, C93, 7 resistors R26, R167, R112, R128, R55, R7, R37, two ends of the capacitor C62 are connected to the S pole and D pole of the MOS tube Q3, the S pole of the MOS tube Q3 is connected to one end of the half-bridge excitation inductor L4, the D pole of the MOS tube Q3 is connected to the diode D18, the emitter of the transistor Q75 is connected to the emitter of the transistor Q77, one end of the resistor R167 is connected to the base of the transistor Q75, and the other end of the resistor R167 is connected to the base of the transistor The base of the transistor Q77 is connected to the base of the transistor Q77, one end of the resistor R26 is connected between the resistor R167 and the transistor Q75, one end of the series connection of the diode D22, the resistor R128, the resistor R55 and the resistor R7 is connected to the emitter of the transistor Q75 and connected between the emitters of the transistor Q77, the other end of the series connection of the diode D22, the resistor R128, the resistor R55 and the resistor R7 is connected in series with the resistor R37 and then connected to the S pole of the MOS transistor Q3, one end of the series connection of the diode D19 and the resistor R112 is connected to the collector of the transistor Q75, the other end of the series connection of the diode D19 and the resistor R112 is connected to the power supply circuit, one end of the capacitor C93 is connected to the S pole of the MOS transistor Q3, the other end of the capacitor C93 is connected to the collector of the transistor Q75, one end of the capacitor C92 is connected to the S pole of the MOS transistor Q3, and the other end of the capacitor C92 is connected between the diode D19 and the resistor R112. Resistors R26 and R41 send driving signals to the upper half-bridge MOS tube Q3 , and transistors Q75 and Q77 , resistors R128 , R55 and R7 form a main driving circuit for the MOS tube Q3 .
[0027] Optionally, the rechargeable battery charging control system provided by the embodiment of the utility model, the lower half-bridge tube driving unit, includes: 1 MOS tube Q4, 2 transistors Q76, Q80, 1 diode D21, 4 capacitors C96, C4, C30, C1A, 6 resistors R41, R127, R9, R126, R24, R119, the two ends of the capacitor C1A are connected to the S pole and D pole of the MOS tube Q4, the D pole of the MOS tube Q4 is connected to one end of the half-bridge excitation inductor L4, the S pole of the MOS tube Q4 is grounded, and one end of the series-connected diode D21, resistor R127, resistor R9, and resistor R126 is connected in parallel to between the emitter of the transistor Q76 and the emitter of the transistor Q80, and the three The emitter of the transistor Q76 is connected to the emitter of the transistor Q80, the other end of the series-connected diode D21, resistor R127, resistor R9, and resistor R126 is connected in parallel, connected to resistor R24 and then grounded, the non-grounded end of the capacitor C30 is connected to the collector of the transistor Q80, one end of the series-connected resistor R119 and capacitor C4 is connected to the collector of the transistor Q76, the other end of the series-connected resistor R119 and capacitor C4 is grounded, the non-grounded end of the capacitor C96 is connected to the collector of the transistor Q76, one end of the resistor R41 is connected between the base of the transistor Q76 and the base of the transistor Q80, the base of the transistor Q76 is connected to the base of the transistor Q80, and the other end of the resistor R41 is connected to the charging circuit.
[0028] Transistor Q76, transistor Q80, resistor R127, resistor R9, and resistor R126 form the main driving circuit of MOS tube Q4. Resistor R37 and resistor R24 form the G-pole driving signal voltage peak absorption circuit of MOS tube Q3 and MOS tube Q4, and the purpose is to protect the MOS tube from damage. The structural design of the upper half-bridge tube driving unit / lower half-bridge tube driving unit is adopted to enhance the driving capability of the half-bridge MOS tube, and the half-bridge circuit has a stronger output load capacity.
[0029] Through the above analysis, it can be seen that in the rechargeable battery charging control system provided by the embodiment of the utility model, the charging drive module drives the charging output module to output direct current to the rechargeable battery, and the constant voltage and constant current module realizes the charging output module to output direct current with constant voltage and constant current. The constant voltage and constant current module includes a constant current loop circuit and a constant voltage loop circuit. The constant current loop circuit and the constant voltage loop circuit respectively realize constant current and constant voltage control on the charging output module. The main characteristic of the constant current loop circuit is that the output current will not change the set value of the charging current with external factors, and the current is kept constant. The main characteristic of the constant voltage loop circuit is that the output voltage will not change the output voltage characteristics with external factors, and the output voltage is kept stable. The circuit architecture of the constant current and constant voltage module of the entire rechargeable battery charging control system is simple, which improves the precise control of the output voltage and current value of the new energy battery charging ignition, improves work efficiency, and can also ensure that the battery charging will not be overcharged, which can extend the battery life.
[0030] Embodiment 2: The new energy vehicle provided in this embodiment includes the rechargeable battery charging control system described above. The rechargeable battery charging control system includes a constant voltage and constant current module, a charging drive module and a charging output module. The charging drive module drives the charging output module to output direct current to the rechargeable battery. The constant voltage and constant current module enables the charging output module to output a constant voltage and constant current direct current. The constant voltage and constant current module includes a constant current loop circuit and a constant voltage loop circuit. The constant current loop circuit and the constant voltage loop circuit respectively realize constant current and constant voltage control of the charging output module.
[0031] Through the above analysis, it can be seen that in the rechargeable battery charging control system provided by the embodiment of the utility model, the charging drive module drives the charging output module to output direct current to the rechargeable battery, and the constant voltage and constant current module realizes that the charging output module outputs direct current with constant voltage and constant current. The constant voltage and constant current module includes a constant current loop circuit and a constant voltage loop circuit. The constant current loop circuit and the constant voltage loop circuit respectively realize constant current and constant voltage control on the charging output module. The main characteristic of the constant current loop circuit is that the output current will not change the set value of the charging current with external factors, and the current is kept constant. The main characteristic of the constant voltage loop circuit is that the output voltage will not change the output voltage characteristics with external factors, and the output voltage is kept stable. The circuit architecture of the constant current and constant voltage module of the entire rechargeable battery charging control system is simple, which improves the precise control of the output voltage and current value of the charging ignition of the new energy vehicle battery, improves work efficiency, and can also ensure that the battery charging will not be overcharged, which can extend the battery life.
[0032] In short, the above description is only a preferred embodiment of this specification and is not intended to limit the protection scope of this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included in the protection scope of this specification.
[0033] The systems, devices, modules or units described in one or more of the above embodiments may be implemented by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
[0034] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.
[0035] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.
[0036] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
Claims
1. A rechargeable battery charging control system, characterized in that: It includes a constant voltage and constant current module, a charging drive module and a charging output module. The charging drive module drives the charging output module to output direct current to a rechargeable battery. The constant voltage and constant current module enables the charging output module to output direct current with constant voltage and constant current. The constant voltage and constant current module includes a constant current loop circuit and a constant voltage loop circuit. The constant current loop circuit and the constant voltage loop circuit respectively realize constant current and constant voltage control of the charging output module.
2. The rechargeable battery charging control system according to claim 1, characterized in that: The constant current loop circuit includes: 1 light emitting diode (P8A), 1 transistor (Q33), 4 comparators (U9A, U9B, U141A, U141B), 10 capacitors (C43, C50, C46, C162, C160, C157, C158, C164, C54, C55), 19 resistors (R109, R110, R106, R105, R107, R112, R113, R180, R65, R67, R20, R154, R155, R96, R5, R156, R104, R64, R97), one end of the light emitting diode (P8A) is connected to the collector of the transistor (Q33), the comparator (U9B ) is connected to the base of the transistor (Q33) via a resistor (R107), one end of the resistor (R180) and the capacitor (C46) are connected in parallel to the base of the transistor (Q33) and the other end is grounded, one end of the resistor (R105) is connected to the output of the comparator (U9B), the other end of the resistor (R105) is connected to the + input of the comparator (U9B), one end of the capacitor (C50) is connected to the + input of the comparator (U9B) and the other end is grounded, one end of the capacitor (C43) and the resistor (R110) are connected in parallel to the - input of the comparator (U9B) and the other end is grounded, and one end of the resistor (R109) and the resistor (R112) are connected in series to the comparator (U9B) The output end of the comparator (U9B) is connected to the + input end of the comparator (U9B). The resistor (R106), the resistor (R155), and the capacitor (C160) are connected in series to the - input end of the comparator (U9B) and the other end is connected to the + input end of the comparator (U141B). The capacitor (C162), the resistor (R65) and the resistor (R67) are connected in parallel to the + input end of the comparator (U141B) and the other end is connected to the emitter of the transistor (Q33). The capacitor (C157) and the resistor (R64) are connected in series with the capacitor (C158) and the other end is connected to the - input end of the comparator (U141B). One end of resistor (R20) is connected to the + input of comparator (U141B) and the other end is connected to the 8th pin of comparator (U9A). The + input of comparator (U9A) is connected to the output of comparator (U9A). One end of resistor (R154) and resistor (R155) are connected in parallel to the output of comparator (U141A) and the other end is connected to the + input of comparator (U141B). Resistors (R97), (R96), (R5) and (R156) are connected in series to the + input of comparator (U141A) and the other end is grounded.One end of the resistor (C55) is connected between the resistor (R96) and the resistor (R5) and then grounded. One end of the capacitor (C54) is connected between the resistor (R5) and the resistor (R156) and then grounded. One end of the resistor (R104) and the capacitor (C164) connected in parallel is connected to the + input terminal of the comparator (U141A) and the other end is grounded.
3. The rechargeable battery charging control system according to claim 2, characterized in that: The constant voltage loop circuit includes: 1 light emitting diode (P2A), 1 diode group (D6), 3 comparators (U3, U140B, U140A), 13 capacitors (C5, C7, C266, C268, C269, C151, C159, C149, C148, C40, C58, C57, C56), 21 resistors (R23, R266, R267, R143, R24, R153, R155, R144, R145, R68, R448, R109, R8, R142, R46, R47, R100, R111, R99, R98, R103), one end of the capacitor (C5) is connected to the comparator (U3 ) is connected to the - input terminal of the comparator (U3), the other end of the line is connected to the + input terminal of the comparator (U3), the resistor (R23) and the resistor (R155) are connected to the - input terminal of the comparator (U141B), one end of the capacitor (C7) is connected between the resistor (R23) and the resistor (R155) and then grounded, one end of the series connection of the resistor (R266) and the capacitor (C268) is connected between the resistor (R23) and the resistor (R155) and the other end is grounded, one end of the series connection of the resistor (R267) and the capacitor (C269) is connected to the power supply circuit and the other end is grounded, one end of the parallel connection of the capacitor (C159) and the resistor (R68) is connected to the - input terminal of the comparator (U141B) and the other end is grounded, the series connection of the resistor ( One end of the resistor (R109), the capacitor (C40) and the capacitor (C148) connected in parallel is connected to the output of the comparator (U140B) and the other end thereof is connected to the -input of the comparator (U141B). One end of the resistor (R448) is connected to the power supply circuit and the other end thereof is connected to the -input of the comparator (U141B). One end of the capacitor (C149) is connected to the -input of the comparator (U141B) and the other end thereof is connected to the +input of the comparator (U141B). One end of the resistor (R24), the resistor (R153) and the capacitor (C151) connected in parallel is connected to the +input of the comparator (U141B) and the other end thereof is grounded. One end of the resistor (R143) is connected to the power supply circuit and the other end thereof is connected to the -input of the comparator (U141B). One end is connected to the + input terminal of the comparator (U141B), resistors (R144) and (R145) are connected in parallel to the output terminal of the comparator (U141B) and the other end thereof is connected to the - input terminal of the comparator (U141A), one end of the series-connected resistors (R98), (R99), (R100) and (R111) are connected to the + input terminal of the comparator (U141B) and the other end thereof is grounded, one end of the capacitor (C56) is connected to the + input terminal of the comparator (U141B) and then to ground, one end of the capacitor (C57) is connected to the + input terminal of the comparator (U141B) and then to ground, one end of the capacitor (C58) is connected to the + input terminal of the comparator (U141B) and then to ground,One end of the resistor (R8), diode group (D6) and resistor (R142) connected in series is connected to the output of the comparator (U140B) and the other end is connected to the output of the comparator (U141B). One end of the light-emitting diode (P2A) and resistor (R47) connected in parallel is connected to the 4th pin of the comparator (U141A) and the other end is connected to the diode group (D6).
4. The rechargeable battery charging control system according to claim 2 or 3, characterized in that: The charging output module adopts a full-bridge rectifier unit for current rectification, and the full-bridge rectifier unit includes: a half-bridge excitation inductor (L4), a main high-frequency transformer (T1 / T2), a capacitor (C27), a differential mode inductor (T70) and five diodes (D1, D3, D7, D9, D10), one end of the half-bridge excitation inductor (L4) is connected to the charging drive module, and the other end of the half-bridge excitation inductor (L4) is connected to the first end of the main high-frequency transformer (T1 / T2), and the series-connected diodes (D1) and diodes (D3) are connected in parallel with the series-connected diodes (D9) and diodes (D10). The non-grounded end after the connection is connected to one end of the diode (D7) via the differential mode inductor (T70), the other end of the diode (D7) is connected to the positive output end of the charging output module, the capacitor (C27) is connected in parallel with the diode (D1) and the diode (D3) connected in series, wherein the third end and the fourth end of the main high-frequency transformer (T1 / T2) are connected, the fifth end of the main high-frequency transformer (T1 / T2) is connected between the diode (D9) and the diode (D10), and the fourth end of the main high-frequency transformer (T1 / T2) is connected between the diode (D1) and the diode (D3).
5. The rechargeable battery charging control system according to claim 4, characterized in that: The charging output module also includes an output balancing capacity storage absorption circuit and a resonant circuit, wherein the output balancing capacity storage absorption circuit includes: 2 capacitors (C41, C65), 4 resistors (R30, R38, R39, R40), and the non-grounded end of the capacitor (C41) and the capacitor (C65) connected in series and the resistor (R30), the resistor (R38), the resistor (R39), and the resistor (R40) connected in series in parallel is connected to one end of the diode (D7); The resonant circuit comprises: two diodes (D17, D18), four capacitors (C39, C24, C78, C42), and the non-grounded end of the series-connected diode (D17), the diode (D18) and the series-connected capacitor (C39), the capacitor (C24), the capacitor (C78), and the capacitor (C42) connected in parallel is connected to one end of the diode (D7).
6. The rechargeable battery charging control system according to claim 4, characterized in that: The charging output module also includes an output voltage regulation circuit and a charging constant current detection circuit, wherein the output voltage regulation circuit includes: 1 capacitor (C71), 5 resistors (R62, R57, R63, R61, R60), and the non-grounded ends of the capacitor (C71), resistor (R62), and resistor (R57) connected in parallel are sequentially connected to resistor (R63), resistor (R61), and resistor (R60) and then connected to one end of the diode (D7); The charging constant current detection circuit comprises: two diodes (D86, D87), three resistors (D10, R110, R109), wherein the resistor (R10), the parallel diodes (D86, D87), the resistor (R110) and the resistor (R109) are connected in series in sequence and then connected to the negative output terminal.
7. The rechargeable battery charging control system according to claim 4, characterized in that: The charging output module also includes an input current transfer loop and an output voltage stabilizing circuit, wherein the input current transfer loop includes: a current transformer (L1A), a capacitor (C53), three resistors (R29, R72, R73) and four diodes (D72, D73, D74, D75), wherein one end of the current transformer (L1A) is connected to the second end of the main high-frequency transformer (T1 / T2), the diode (D75) and the diode (D74) connected in series and the diode (D73) and the diode (D72) connected in series, the resistor (R72) and the resistor (R73) are connected in parallel to the power supply circuit (T11, T12), one end of the capacitor (C53) and the resistor (R29) connected in series is connected between the diode (D75) and the diode (D74), and the other end of the capacitor (C53) and the resistor (R29) connected in series is connected between the diode (D73) and the diode (D72); The output voltage stabilizing circuit comprises: 2 capacitors (C43, C75), 10 resistors (R75, R74, R77, R76, R78, R49, R42, R56, R48, R45), wherein the capacitor (R71), resistor (R75), resistor (R74) connected in parallel and the resistor (R77), resistor (R76), resistor (R78) are connected in series to form a first protection unit, and the capacitor (C43), resistor (R49), resistor (R42) and resistor (R45), resistor (R48), resistor (R56) are connected in series to form a second protection unit, one end of the first protection unit and the second protection unit connected in parallel is connected to the other end of the diode (D7), and one end of the first protection unit and the second protection unit connected in parallel is connected to a power supply circuit.
8. The rechargeable battery charging control system according to claim 6, characterized in that: The charging drive module includes an upper half-bridge tube drive unit and a lower half-bridge tube drive unit, and the upper half-bridge tube drive unit and the lower half-bridge tube drive unit jointly drive the charging output module. The upper half-bridge tube drive unit includes: 1 MOS tube (Q3), 2 triodes (Q75, Q77), 2 diodes (D19, D22), 3 capacitors (C62, C92, C93), 7 resistors (R26, R167, R112, R128, R55, R7, R37), and 10 resistors (R16, R17, R18, R27, R36, R37). The two ends of the capacitor (C62) are connected to the S pole and the D pole of the MOS tube (Q3), the S pole of the MOS tube (Q3) is connected to one end of the half-bridge excitation inductor (L4), the D pole of the MOS tube (Q3) is connected to the diode (D18), the emitter of the transistor (Q75) is connected to the emitter of the transistor (Q77), one end of the resistor (R167) is connected to the base of the transistor (Q75), the other end of the resistor (R167) is connected to the base of the transistor (Q77), and one end of the resistor (R26) is connected to the base of the transistor (Q75). Connected between the resistor (R167) and the transistor (Q75), one end of the series connection of the diode (D22), resistor (R128) and resistor (R55) and resistor (R7) in parallel is connected to the emitter of the transistor (Q75) and connected between the emitters of the transistor (Q77), the other end of the series connection of the diode (D22), resistor (R128) and resistor (R55) and resistor (R7) in parallel is connected to the S pole of the MOS tube (Q3) through a series resistor (R37), the diode (D19), One end of the resistor (R112) connected in series is connected to the collector of the transistor (Q75), the other end of the diode (D19) and the resistor (R112) connected in series is connected to the power supply circuit, one end of the capacitor (C93) is connected to the S pole of the MOS tube (Q3), the other end of the capacitor (C93) is connected to the collector of the transistor (Q75), one end of the capacitor (C92) is connected to the S pole of the MOS tube (Q3), and the other end of the capacitor (C92) is connected between the diode (D19) and the resistor (R112).
9. The rechargeable battery charging control system according to claim 8, characterized in that: The lower half-bridge tube driving unit comprises: a MOS tube (Q4), two transistors (Q76, Q80), a diode (D21), four capacitors (C96, C4, C30, C1A), and six resistors (R41, R127, R9, R126, R24, and R119), wherein the two ends of the capacitor (C1A) are connected to the S pole and the D pole of the MOS tube (Q4), the D pole of the MOS tube (Q4) is connected to one end of the half-bridge excitation inductor (L4), the S pole of the MOS tube (Q4) is grounded, and one end of the series-connected diode (D21), the resistor (R127) and the resistor (R9) and the resistor (R126) is connected in parallel to between the emitter of the transistor (Q76) and the emitter of the transistor (Q80), and the emitter of the transistor (Q76) is connected to the The emitter of (Q80), the other end of the series-connected diode (D21), resistor (R127) and resistor (R9) and resistor (R126) in parallel is connected to resistor (R24) and then grounded, the non-grounded end of capacitor (C30) is connected to the collector of transistor (Q80), one end of the series-connected resistor (R119) and capacitor (C4) is connected to the collector of transistor (Q76), the other end of the series-connected resistor (R119) and capacitor (C4) is grounded, the non-grounded end of capacitor (C96) is connected to the collector of transistor (Q76), one end of resistor (R41) is connected between the base of transistor (Q76) and the base of transistor (Q80), the base of transistor (Q76) is connected to the base of transistor (Q80), and the other end of resistor (R41) is connected to the charging circuit.
10. A new energy vehicle, characterized in that: The invention comprises a rechargeable battery charging control system according to any one of claims 1 to 9.