CN113949120B - Pre-charging circuit and method for marine battery system - Google Patents
Pre-charging circuit and method for marine battery system Download PDFInfo
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- CN113949120B CN113949120B CN202111163170.8A CN202111163170A CN113949120B CN 113949120 B CN113949120 B CN 113949120B CN 202111163170 A CN202111163170 A CN 202111163170A CN 113949120 B CN113949120 B CN 113949120B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 42
- 238000007599 discharging Methods 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a precharge circuit and a precharge method of a marine battery system, and relates to the technical field of battery protection circuits. The circuit comprises: the controlled follow current module is connected in parallel with the contactor; the current acquisition module is used for acquiring real-time current of the pre-charging circuit; the input voltage value acquisition module is used for acquiring the input voltage value of the controlled follow current module; the output voltage value acquisition module is used for acquiring the output voltage value of the controlled follow current module; and the MCU is used for controlling the on/off of the switching element according to the real-time current, the input voltage value, the output voltage value, the inductance of the inductor and the preset voltage difference. In this way, sticking damage of the discharge contactor when closed can be avoided.
Description
Technical Field
Embodiments of the present application relate to the field of battery protection circuits, and more particularly, to a precharge circuit and method of a marine battery system.
Background
The battery system generally comprises a battery pack, a discharging contactor and a load subsystem, wherein the load subsystem generally comprises a load capacitor with larger capacitance, when the battery pack discharges the load subsystem, if the discharging contactor is directly closed, a large current flows in the closing process of the discharging contactor, so that the contact adhesion of the discharging contactor is easy to cause the damage of the discharging contactor, and a pre-charging circuit is generally adopted in the battery system to solve the problem.
The existing pre-charging circuit is usually composed of a pre-charging contactor and a pre-charging resistor, and because the pre-charging circuit adopts a resistance-capacitance pre-charging circuit, the current flowing through the pre-charging resistor in the initial stage of charging of a load capacitor is very large, and when the load capacitor is gradually fully charged, the current passing through the load capacitor is gradually reduced, so that a resistor with proper power is difficult to select, if the resistor with larger power is selected, the resistor is larger in size and difficult to install, if the resistor with smaller power is selected, overload damage is easy to occur, the pre-charging time of the resistance-capacitance pre-charging circuit is longer, and if the capacitance of the load capacitor is changed, the pre-charging voltage possibly cannot reach the standard, and the discharging contactor is adhered to and damaged when being closed.
Disclosure of Invention
In order to avoid adhesion damage of the discharging contactor when the discharging contactor is closed, the application provides a precharge circuit and a precharge method of a marine battery system.
In a first aspect of the application, a pre-charge circuit for a marine battery system is provided. Wherein, marine battery system includes group battery, discharge contactor and load subsystem of establishing ties, and this circuit includes:
the controlled freewheel module is connected in parallel with the discharge contactor and comprises an inductor and a switching element, wherein the switching element is used for controlling the on or off of the controlled freewheel module through the on or off of the switching element;
The current acquisition module is connected with the controlled follow current module and is used for acquiring the real-time current of the pre-charging circuit;
the input voltage value acquisition module is connected to the input end of the controlled follow current module and used for acquiring the input voltage value of the controlled follow current module;
The output voltage value acquisition module is connected to the output end of the controlled follow current module and used for acquiring the output voltage value of the controlled follow current module;
and the MCU is connected with the output end of the current acquisition module, the output end of the input voltage value acquisition module and the output end of the output voltage value acquisition module and is used for controlling the switching element to be turned on or turned off according to the real-time current, the input voltage value, the output voltage value, the inductance of the inductor and a preset voltage difference.
By adopting the technical scheme, when the battery system needs to discharge, the input voltage value and the output voltage value at two ends of the discharge contactor are detected, the inductance value of the inductor and the preset voltage difference are combined to control the current value in the pre-charging circuit, so that the current value is kept constant, after the load capacitor is fully charged, the input voltage value and the output voltage value at two ends of the discharge contactor are detected again, after the voltage difference between the input voltage value and the output voltage value reaches the preset voltage difference, the discharge contactor is started again, and the pre-charging circuit is closed, and as the voltage difference at two ends of the contact of the discharge contactor is very small before the discharge contactor is started, the problem of contact adhesion of the contact is not easy to occur, and the problem of adhesion damage of the discharge contactor caused by the change of the capacitance of the load capacitor is avoided by regulating the circuit in real time according to the detected pre-charging current.
Preferably, the controlled freewheel module is connected in parallel to the contactor and comprises an inductor and a switching element, wherein the switching element is used for controlling the on or off of the controlled freewheel module through the on or off of the switching element;
The current acquisition module is connected with the controlled follow current module and is used for acquiring the real-time current of the pre-charging circuit;
the input voltage value acquisition module is connected to the input end of the controlled follow current module and used for acquiring the input voltage value of the controlled follow current module;
The output voltage value acquisition module is connected to the output end of the controlled follow current module and used for acquiring the output voltage value of the controlled follow current module;
and the MCU is connected with the output end of the current acquisition module, the output end of the input voltage value acquisition module and the output end of the output voltage value acquisition module and is used for controlling the switching element to be turned on or turned off according to the real-time current, the input voltage value, the output voltage value, the inductance of the inductor and a preset voltage difference.
Preferably, the current collection module specifically includes a current sensor, an input end of the current sensor is connected with the battery pack, and an output end of the current sensor is connected with the MCU controller.
Preferably, the input voltage value acquisition module includes:
a first resistor, one end of which is connected with the battery pack;
A second resistor, one end of which is connected with the other end of the first resistor, and the other end of which is grounded;
a third resistor, one end of which is connected with the other end of the first resistor, and the other end of which is connected with the MCU controller;
a first capacitor, one end of which is connected with the other end of the first resistor, and the other end of which is grounded;
and one end of the second capacitor is connected with the other end of the third resistor, and the other end of the second capacitor is grounded.
Preferably, the output voltage value acquisition module includes:
A fourth resistor, one end of which is connected with the load subsystem;
a fifth resistor, one end of which is connected with the other end of the fourth resistor, and the other end of which is grounded;
a sixth resistor, one end of which is connected with the other end of the fourth resistor, and the other end of which is connected with the MCU controller;
A third capacitor, one end of which is connected with the other end of the fourth resistor, and the other end of which is grounded;
And one end of the fourth capacitor is connected with the other end of the sixth resistor, and the other end of the fourth capacitor is grounded.
In a second aspect of the present application, a method of pre-charging a marine battery system is provided. The method comprises the following steps:
collecting an input voltage value, an output voltage value and a real-time current value of a battery system;
outputting a control pulse signal according to the input voltage value, the output voltage value, the real-time current value, a preset voltage difference and the inductance of the inductor;
Controlling the switching element to be turned on or off according to the control pulse signal;
When the precharge circuit is started, the first N-channel enhancement type MOS tube is in a starting state, and the second N-channel enhancement type MOS tube, the third N-channel enhancement type MOS tube and the fourth N-channel enhancement type MOS tube are in a closing state; when the precharge circuit is turned off, the first N-channel enhancement type MOS tube, the second N-channel enhancement type MOS tube, the third N-channel enhancement type MOS tube and the fourth N-channel enhancement type MOS tube are in a turned-off state.
It should be understood that the description in this summary is not intended to limit the critical or essential features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the description that follows.
Drawings
The above and other features, advantages and aspects of embodiments of the present application will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:
FIG. 1 is a block diagram of a pre-charge circuit of a marine battery system in an embodiment of the application;
FIG. 2 is a schematic diagram of the MCU controller in the working process of the embodiment of the application;
fig. 3 is a flowchart of a pre-charging method of the marine battery system in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
In one aspect, the present application provides a pre-charge circuit for a marine battery system.
Referring to fig. 1, the circuit includes a controlled freewheel module 110 connected in parallel to a discharge contactor 160, a current collection module 120 for collecting a real-time current of a pre-charge circuit, an input voltage value collection module 130 for collecting an input voltage value of the controlled freewheel module 110, an output voltage value collection module 140 for collecting an output voltage value of the controlled freewheel module 110, and an MCU controller 150 for controlling the controlled freewheel module 110 to be turned on or off. Wherein the controlled freewheel module 110 comprises an inductor 111 and a switching element. The MCU controller 150 controls the controlled flywheel module 110 to be turned on or off according to the collected real-time current, input voltage value, output voltage value, inductance of the inductor 111, and preset voltage difference.
It should be noted that the battery system includes a battery pack, a discharge contactor 160, and a load subsystem 170
By adopting the above technical scheme, the MCU controller 150 outputs the control pulse signal for controlling the controlled freewheel module 110 to be turned on or off by detecting the real-time current, the input voltage value and the output voltage value acquired by the current acquisition module 120, the input voltage value acquisition module 130 and the output voltage value acquisition module 140 and combining the inductance of the inductor 111 in the controlled freewheel module 110 with the required preset voltage difference, and the precharge current is kept constant by the regulation and control of the MCU controller 150, so that the load capacitor 171 can be charged quickly.
The controlled freewheel module 110, the current collection module 120, the input voltage value collection module 130, the output voltage value collection module 140, and the MCU controller 150 are described in detail below.
First, the battery system sequentially includes a battery pack, a discharge contactor 160, and a load subsystem 170, and the load subsystem 170 includes at least one load capacitor 171 and one load resistor 172.
The controlled freewheel module 110 is connected in parallel across the discharge contactor 160 for regulating the precharge current in the precharge circuit. The controlled freewheel module 110 comprises an inductor 111 and a switching element for controlling the turning on or off of the controlled freewheel module 110 by its turning on or off.
In some embodiments, the switching elements include a first N-channel enhancement MOS transistor 112, a second N-channel enhancement MOS transistor 113, a third N-channel enhancement MOS transistor 114, and a fourth N-channel enhancement MOS transistor 115. Specifically, the D-pole pin of the first N-channel enhancement MOS transistor 112 is connected to the battery pack, the S-pole pin is connected to the inductor 111, and the G-pole pin is connected to the MCU controller 150. The D-pole pin of the second N-channel enhancement MOS transistor 113 is connected to the load capacitor in the load subsystem 170, the S-pole pin is connected to the inductor 111, and the G-pole pin is connected to the MCU controller 150. The D-pole pin of the third N-channel enhancement MOS transistor 114 is connected to the inductor 111, the S-pole pin is grounded, and the G-pole pin is connected to the MCU controller 150. The D-pole pin of the fourth N-channel enhancement MOS transistor 115 is connected to the inductor 111, the S-pole pin is grounded, and the G-pole pin is connected to the MCU controller 150.
It should be noted that, there is a diode between the S pole and the D pole of the N-channel enhancement type MOS transistor, and the S pole is connected to the positive pole of the diode, and the D pole is connected to the negative pole of the diode, so when the N-channel enhancement type MOS transistor is in the off state, current can also flow from the S pole to the D pole of the N-channel enhancement type MOS transistor.
In some embodiments, the current collection module 120 includes a current sensor 121, one end of the current sensor 121 is connected to the battery pack, and the other end is connected to the MCU controller 150. When the precharge circuit is turned on, the current sensor 121 may detect the precharge current in the precharge circuit in real time and output the real-time current value to the MCU controller.
The input voltage value acquisition module 130 is connected with the battery pack. In some embodiments, the input voltage value acquisition module 130 includes a first resistor 131, a second resistor 132, a third resistor 133, a first capacitor 134, and a second capacitor 135. Specifically, one end of the first resistor 131 is connected to the battery pack, and the other end is connected to the second resistor 132; the other end of the second resistor is grounded. One end of the third resistor 133 is connected to the other end of the first resistor 131, and the other end of the third resistor 133 is connected to the MCU controller 150. The first capacitor 134 is disposed between the circuits of the first resistor 131 and the third resistor 133, one end of the first capacitor 134 is connected to the other end of the first resistor 131, and the other end of the first capacitor 134 is grounded. The second capacitor 135 is disposed between the third resistor 133 and the circuit of the MCU controller 150, one end of the second capacitor 135 is connected to the other end of the third resistor 133, and the other end of the second capacitor 135 is grounded.
The output voltage value acquisition module 140 is connected to a load capacitor 171 in the load subsystem 170. In some embodiments, the output voltage value acquisition module 140 includes a fourth resistor 141, a fifth resistor 142, a sixth resistor 143, a third capacitor 144, and a fourth capacitor 145. Specifically, one end of the fourth resistor 141 is connected to the load capacitor 171, and the other end is connected to the fifth resistor 142; the other end of the fifth resistor is grounded. One end of the sixth resistor 143 is connected to the other end of the fourth resistor 141, and the other end of the sixth resistor 143 is connected to the MCU controller 150. The third capacitor 144 is disposed between the circuits of the fourth resistor 141 and the sixth resistor 143, one end of the third capacitor 144 is connected to the other end of the fourth resistor 141, and the other end of the third capacitor 144 is grounded. The fourth capacitor 145 is disposed between the sixth resistor 143 and the circuit of the MCU controller 150, one end of the fourth capacitor 145 is connected to the other end of the sixth resistor 143, and the other end of the fourth capacitor 145 is grounded.
In some embodiments, a Battery Management System (BMS) for controlling the discharge of the battery system is further included in the battery system, and when the discharge is required, a user may control the MCU controller 150 to start operation by outputting a control signal requesting the discharge through the BMS.
The specific control manner of the MCU controller 150 is: referring to fig. 1 and 2, when it is required to start discharging, the BMS outputs a control signal requesting discharging to the MCU controller 150; the MCU controller 150 starts to detect the input voltage value and the output voltage value acquired by the input voltage value acquisition module 130 and the output voltage value acquisition module 140 after receiving the control signal, and outputs an initial control pulse signal according to the input voltage value, the output voltage value, the inductance of the inductor 111, and a preset voltage difference, and outputs the initial control pulse signal to each switching element in the controlled freewheel module 110.
Specifically, the MCU controller 150 controls the first N-channel enhancement MOS transistor 112 to be turned on, and keeps the second N-channel enhancement MOS transistor 113, the third N-channel enhancement MOS transistor 114, and the fourth N-channel enhancement MOS transistor 115 in the turned-off state. At this time, the current output from the battery pack flows to the inductor 111 through the first N-channel enhancement MOS transistor 112, and flows from the inductor 111 to the D electrode through the freewheeling diode of the second N-channel enhancement MOS transistor 113, and finally to the load capacitor 171. In the pre-charging process, the MCU controller 150 detects the real-time current value acquired by the current acquisition module 120 in real time, and the MCU controller 150 adjusts the parameters of the control pulse signal according to the change of the real-time current value, thereby regulating the pre-charging current in the pre-charging circuit. Since the inductor 111 is provided, the current in the precharge circuit is kept constant by the characteristic that the inductor 111 blocks the current from varying. After the load capacitor 171 is pre-charged, the MCU controller 150 detects the input voltage value and the output voltage value again, and when the voltage difference between the input voltage value and the output voltage value reaches the preset voltage difference, the discharging contactor 160 is turned on and the pre-charging circuit is turned off. It should be noted that the preset voltage difference refers to the maximum voltage difference that will not cause the contact of the contactor to adhere.
In another aspect, the application provides a method for pre-charging a marine battery system, which is applied to the pre-charging circuit of the marine battery system. Referring to fig. 3, the method includes the steps of:
step S210: and collecting an input voltage value, an output voltage value and a real-time current value of the battery system.
Step S220: the control pulse signal is output according to the input voltage value, the output voltage value, the real-time current value, the preset voltage difference, and the inductance of the inductor 111.
Step S230: the switching element is controlled to be turned on or off according to the control pulse signal.
It should be noted that the preset voltage difference refers to the maximum voltage difference that will not cause adhesion between the contacts at the two ends of the contactor.
Specifically, when the battery system needs to be discharged, the input voltage value and the output voltage value of the pre-charging circuit are detected first, and the pre-charging current value required in the pre-charging circuit can be calculated according to the preset voltage difference, the required pre-charging time and the inductance of the inductor 111. And outputting a corresponding initial control pulse signal according to the acquired input voltage value, the output voltage value and the calculated precharge current value. The initial control pulse signal controls the first N-channel enhancement MOS transistor 112 to be turned on, and keeps the second N-channel enhancement MOS transistor 113, the third N-channel enhancement MOS transistor 114, and the fourth N-channel enhancement MOS transistor 115 in an off state. The method comprises the steps of collecting real-time current values in a pre-charging circuit in real time while pre-charging, wherein the current values in the pre-charging circuit are different, and parameters of output control pulse signals are different, so that the current values in the pre-charging circuit are regulated and controlled to keep constant. After the load capacitor is charged, the input voltage value and the output voltage value of the pre-charging circuit are detected again, and when the voltage difference between the input voltage value and the output voltage value reaches the preset voltage difference, the discharging contactor 160 can be turned on and the pre-charging circuit can be turned off.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application is not limited to the specific combinations of the features described above, but also covers other embodiments which may be formed by any combination of the features described above or their equivalents without departing from the spirit of the application. Such as the above-mentioned features and the technical features having similar functions (but not limited to) applied for in the present application are replaced with each other.
Claims (2)
1. A pre-charge circuit for a marine battery system comprising a battery pack, a discharge contactor and a load subsystem in series, comprising:
the controlled freewheel module is connected in parallel with the discharge contactor and comprises an inductor and a switching element, wherein the switching element is used for controlling the on or off of the controlled freewheel module through the on or off of the switching element;
The current acquisition module is connected with the controlled follow current module and is used for acquiring the real-time current of the pre-charging circuit;
the input voltage value acquisition module is connected to the input end of the controlled follow current module and used for acquiring the input voltage value of the controlled follow current module;
The output voltage value acquisition module is connected to the output end of the controlled follow current module and used for acquiring the output voltage value of the controlled follow current module;
The MCU controller is connected with the output end of the current acquisition module, the output end of the input voltage value acquisition module and the output end of the output voltage value acquisition module and is used for controlling the switching element to be turned on or turned off according to the real-time current, the input voltage value, the output voltage value, the inductance of the inductor and a preset voltage difference;
the switching element specifically includes:
The battery pack comprises a battery pack, a first N-channel enhancement type MOS tube, a battery pack, an inductor, an MCU controller and a battery, wherein a D-pole pin of the first N-channel enhancement type MOS tube is connected with the battery pack, an S-pole pin of the first N-channel enhancement type MOS tube is connected with the inductor, and a G-pole pin of the first N-channel enhancement type MOS tube is connected with the MCU controller;
the D electrode pin of the second N-channel enhancement type MOS tube is connected with the load subsystem, the S electrode pin of the second N-channel enhancement type MOS tube is connected with the inductor, and the G electrode pin of the second N-channel enhancement type MOS tube is connected with the MCU controller;
the third N-channel enhancement type MOS tube is connected with the inductor through a D-electrode pin, the S-electrode pin of the third N-channel enhancement type MOS tube is grounded, and the G-electrode pin of the third N-channel enhancement type MOS tube is connected with the MCU controller;
The D electrode pin of the fourth N-channel enhancement type MOS tube is connected with the inductor, the S electrode pin of the fourth N-channel enhancement type MOS tube is grounded, and the G electrode pin of the fourth N-channel enhancement type MOS tube is connected with the MCU controller;
the current acquisition module specifically comprises a current sensor, wherein the input end of the current sensor is connected with the battery pack, and the output end of the current sensor is connected with the MCU controller;
The input voltage value acquisition module comprises:
a first resistor, one end of which is connected with the battery pack;
A second resistor, one end of which is connected with the other end of the first resistor, and the other end of which is grounded;
a third resistor, one end of which is connected with the other end of the first resistor, and the other end of which is connected with the MCU controller;
a first capacitor, one end of which is connected with the other end of the first resistor, and the other end of which is grounded;
A second capacitor, one end of which is connected with the other end of the third resistor, and the other end of which is grounded;
the output voltage value acquisition module comprises:
A fourth resistor, one end of which is connected with the load subsystem;
a fifth resistor, one end of which is connected with the other end of the fourth resistor, and the other end of which is grounded;
a sixth resistor, one end of which is connected with the other end of the fourth resistor, and the other end of which is connected with the MCU controller;
A third capacitor, one end of which is connected with the other end of the fourth resistor, and the other end of which is grounded;
And one end of the fourth capacitor is connected with the other end of the sixth resistor, and the other end of the fourth capacitor is grounded.
2. A method of pre-charging a battery system for a ship, applied to the pre-charging circuit of a battery system for a ship according to claim 1, comprising:
Collecting an input voltage value, an output voltage value and a real-time current value of a battery system;
outputting a control pulse signal according to the input voltage value, the output voltage value, the real-time current value, a preset voltage difference and the inductance of the inductor;
Controlling the switching element to be turned on or off according to the control pulse signal;
When the precharge circuit is started, the first N-channel enhancement type MOS tube is in a starting state, and the second N-channel enhancement type MOS tube, the third N-channel enhancement type MOS tube and the fourth N-channel enhancement type MOS tube are in a closing state; when the precharge circuit is turned off, the first N-channel enhancement type MOS tube, the second N-channel enhancement type MOS tube, the third N-channel enhancement type MOS tube and the fourth N-channel enhancement type MOS tube are in a turned-off state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111163170.8A CN113949120B (en) | 2021-09-30 | 2021-09-30 | Pre-charging circuit and method for marine battery system |
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| CN202111163170.8A CN113949120B (en) | 2021-09-30 | 2021-09-30 | Pre-charging circuit and method for marine battery system |
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| CN113949120A CN113949120A (en) | 2022-01-18 |
| CN113949120B true CN113949120B (en) | 2024-05-31 |
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| JP2005269742A (en) * | 2004-03-17 | 2005-09-29 | Sanyo Electric Co Ltd | Power source device for vehicle and switching method of contactor |
| US8766602B1 (en) * | 2010-08-30 | 2014-07-01 | Enerdel, Inc. | Self protecting pre-charge circuit |
| CN104518547A (en) * | 2013-09-26 | 2015-04-15 | 福特全球技术公司 | Bus pre-charge control using buck converter |
| CN105871026A (en) * | 2016-05-20 | 2016-08-17 | 广州汽车集团股份有限公司 | Precharging device for electric vehicle and precharging method of precharging device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017223229A1 (en) * | 2017-12-19 | 2019-06-19 | Volkswagen Aktiengesellschaft | Electrical system and method for diagnosing the functionality of power relays in an electrical system |
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2021
- 2021-09-30 CN CN202111163170.8A patent/CN113949120B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005269742A (en) * | 2004-03-17 | 2005-09-29 | Sanyo Electric Co Ltd | Power source device for vehicle and switching method of contactor |
| US8766602B1 (en) * | 2010-08-30 | 2014-07-01 | Enerdel, Inc. | Self protecting pre-charge circuit |
| CN104518547A (en) * | 2013-09-26 | 2015-04-15 | 福特全球技术公司 | Bus pre-charge control using buck converter |
| CN105871026A (en) * | 2016-05-20 | 2016-08-17 | 广州汽车集团股份有限公司 | Precharging device for electric vehicle and precharging method of precharging device |
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| CN113949120A (en) | 2022-01-18 |
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