Current supplementing device of passenger car and passenger car

Abstract

The utility model relates to the field of passenger car power supplies, and provides a current supplementing device of a passenger car and the passenger car, the current supplementing device comprises a shell, a capacitor bank and a control circuit, the capacitor bank and the control circuit are arranged in the shell, and the shell is arranged on a cab bottom plate of the passenger car; one end of the capacitor bank is grounded, and the capacitor bank comprises a plurality of series-connected super-capacitors and is used for providing supplementary electric energy; the control circuit comprises a control module and a first switch module; the control module is connected with collision sensing equipment of the passenger car; the control end of the first switch module is connected with the control module, the input end of the first switch module is connected with the capacitor bank, and the output end of the first switch module is connected with a whole vehicle power grid system of the passenger vehicle; the control module closes the first switch module after receiving the collision signal, and electric energy of the capacitor bank is output to a whole vehicle power grid system. Under the condition that the power grid of the whole vehicle is broken and powered off due to the collision of the whole vehicle, the system can supply power to the power grid of the driving cabin for a period of time, thereby ensuring the normal logic driving of related modules in the driving cabin after the collision of the whole vehicle.

Description

Technical Field

[0001] The utility model relates to the field of power sources for passenger cars, and particularly to a current supplement device for a passenger car and a passenger car. Background Art

[0002] In the prior art, the passenger car battery is often arranged in the engine compartment (single battery) or in the engine compartment and the trunk (dual battery), and the total power distribution center is often also arranged in the engine compartment and the trunk.

[0003] Since the engine compartment and the trunk are located at the front and rear of the passenger car respectively, when the passenger car collides, the battery and the total power distribution center arranged in the engine compartment and the trunk of the passenger car are often damaged. The damage of the battery and the total power distribution center will cause the relevant modules in the cockpit to lose power, and then the relevant post-collision logic cannot be implemented, such as the doors cannot be opened from the outside, the lights in the cockpit cannot be lit, the emergency call signal cannot be sent, etc., thus affecting the user experience and user safety, and at the same time increasing the difficulty of rescue work. Summary of the Utility Model

[0004] The utility model is used to solve the problem that when a passenger car collides, the relevant modules in the cabin cannot work due to the damage of the battery and the total power distribution center, thus threatening the life safety of users and increasing the difficulty of rescue.

[0005] In order to solve the above technical problems, in an embodiment of the utility model, a current supplement device for a passenger car is provided, including: a housing, a capacitor bank and a control circuit. The capacitor bank and the control circuit are arranged in the housing, and the housing is arranged on the floor of the cockpit of the passenger car;

[0006] One end of the capacitor bank is grounded and includes a plurality of supercapacitors connected in series for providing supplementary electric energy;

[0007] The control circuit includes a control module and a first switch module; the control module is connected to the collision sensing device of the passenger car; the control end of the first switch module is connected to the control module, the input end of the first switch module is connected to the capacitor bank, and the output end of the first switch module is connected to the vehicle power grid system of the passenger car; the control module closes the first switch module after receiving a collision signal, and the electric energy of the capacitor bank is output to the vehicle power grid system.

[0008] As a further embodiment of the utility model, a solid heat-conducting glue is arranged between the supercapacitors for fixing the supercapacitors and dissipating heat from the supercapacitors.

[0009] As a further embodiment of the utility model, the first switch module includes: a first MOS transistor;

[0010] The control terminal of the first MOS transistor is connected to the control module, the input terminal of the first MOS transistor is connected to the capacitor bank, and the output terminal of the first MOS transistor is connected to the vehicle power grid system.

[0011] In a further embodiment of the present invention, it further includes: a current detection circuit;

[0012] The current detection circuit is arranged between the output terminal of the first switching module and the connection terminal of the vehicle power grid system for sensing the output current;

[0013] The control module is further connected to the current detection circuit, and when the output current is abnormal, the control module cuts off the first switching module.

[0014] In a further embodiment of the present invention, it further includes: a first diode arranged between the current detection circuit and the vehicle power grid system for isolating the influence of external current on the current supplement device.

[0015] In a further embodiment of the present invention, it further includes: a second switching module, a first voltage detection circuit and a first resistor;

[0016] The control terminal of the second switching module is connected to the control module, the input terminal of the second switching module is connected to the vehicle power grid system, and the output terminal of the second switching module is connected to the capacitor bank;

[0017] The first voltage detection circuit is arranged on both sides of the capacitor bank for detecting the voltage of the capacitor bank;

[0018] The first resistor is connected in parallel across the second switching module;

[0019] The control module is further connected to the first voltage detection circuit, disconnects the second switching module when the vehicle power grid system starts to charge the capacitor bank, and closes the second switching module when the voltage of the capacitor bank is greater than a preset voltage.

[0020] In a further embodiment of the present invention, the second switching module includes: a second MOS transistor;

[0021] The control terminal of the second MOS transistor is connected to the control module, the input terminal of the second MOS transistor is connected to the vehicle power grid system, and the output terminal of the second MOS transistor is connected to the capacitor bank.

[0022] In a further embodiment of the present invention, it further includes: a second diode arranged between the first resistor and the vehicle power grid system, and when the second diode conducts, the vehicle power grid system charges the capacitor bank.

[0023] In a further embodiment of the present utility model, it further includes: a third diode and a second voltage detection circuit;

[0024] The third diode is connected in series with the second voltage detection circuit, and the series branch of the third diode and the second voltage detection circuit is arranged between the node where the current supplement device is connected to the vehicle power grid system and the grounding end;

[0025] The second voltage detection circuit is connected to the control module for collecting the voltage of the vehicle power grid system. When the voltage of the vehicle power grid system is greater than a preset threshold, the control module disconnects the first switch module, and when the voltage of the vehicle power grid system is zero, the control module closes the first switch module.

[0026] In a further embodiment of the present utility model, the housing includes a first cover body and a second cover body; two opposite sides of the first cover body and the second cover body have an extension structure;

[0027] The extension structures of the first cover body and the second cover body are fixed by bolts and nuts.

[0028] In a further embodiment of the present utility model, the housing is made of aluminum alloy.

[0029] The second aspect of the present utility model provides a passenger vehicle, including the existing components of the passenger vehicle and a current supplement device.

[0030] By configuring a current supplement device on the passenger vehicle, in the case of power-off of the vehicle power grid due to a vehicle collision, it can supply power to the cockpit power grid for a period of time, ensuring that the relevant module logic in the cockpit is normally driven after the vehicle collision, such as opening the door from the outside, lighting the lights in the cockpit, sending out a distress signal, etc., providing help for rescue and improving user safety and user experience. In specific applications, the current supplement device can also strongly supplement the static current of the vehicle power grid after the vehicle is normally powered off, ensuring the normal operation of the vehicle.

[0031] To make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Shows a first schematic structural diagram of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0034] Figure 2 Shows a schematic cross-sectional view of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0035] Figure 3 Shows a schematic side view of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0036] Figure 4 Shows a second schematic structural diagram of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0037] Figure 5 Shows a third schematic structural diagram of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0038] Figure 6 Shows a fourth schematic structural diagram of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0039] Figure 7 Shows a fifth schematic structural diagram of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0040] Figure 8 Shows a sixth schematic structural diagram of the current supplement device for a passenger vehicle according to an embodiment of the present utility model;

[0041] Figure 9 Shows the circuit diagram of the current supplement device for a passenger vehicle according to a specific embodiment of the present utility model.

[0042] Explanation of the reference symbols in the drawings:

[0043] 110, housing;

[0044] 111, first cover;

[0045] 112, second cover;

[0046] 113, extension structure;

[0047] 114, connector;

[0048] 120, capacitor bank;

[0049] 121, super capacitor;

[0050] 122, heat-conducting glue;

[0051] 130, control circuit;

[0052] 131, control module;

[0053] 132. First switch module;

[0054] 140. Current detection circuit;

[0055] 150. First diode;

[0056] 160. Second switch module;

[0057] 170. First voltage detection circuit;

[0058] 180. First resistor;

[0059] 190. Second diode;

[0060] 200. Third diode;

[0061] 210. Second voltage detection circuit. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0063] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or equipment.

[0064] It should also be understood that in the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the associated objects before and after.

[0065] The passenger vehicle described in this utility model includes, but is not limited to, operation vehicles for transporting passengers or carry-on luggage, as well as private cars for personal or family use. The vehicle power grid system described in this utility model refers to the system that powers the vehicle's electronic and electrical systems.

[0066] In the prior art, the passenger vehicle battery is often arranged in the engine compartment or the trunk. When a passenger vehicle collides, it is very likely to collide with the engine compartment and the trunk. The engine compartment and the trunk are often damaged due to the collision, resulting in damage to the battery and the main power distribution center, and further causing the logic of related components in the vehicle to fail to be implemented. For example, the doors cannot be opened from the outside, the lights in the cockpit cannot be lit, and the emergency call signal cannot be sent out, etc., thus affecting the user experience and user safety and increasing the difficulty of rescue work.

[0067] To solve the above technical problems existing in the prior art, on the one hand, this utility model provides a current supplement device for a passenger vehicle, as Figure 1 shown, including: a housing 110, a capacitor bank 120, and a control circuit 130. The capacitor bank 120 and the control circuit 130 are arranged in the housing 110, and the housing 110 is arranged on the floor of the passenger vehicle cockpit.

[0068] One end of the capacitor bank 120 is grounded and includes a plurality of supercapacitors 121 connected in series for providing supplementary electric energy.

[0069] The control circuit 130 includes a control module 131 and a first switch module 132; the control module 131 is connected to the collision sensing device of the passenger vehicle; the control end of the first switch module 132 is connected to the control module 131, the input end of the first switch module 132 is connected to the capacitor bank 120, and the output end of the first switch module 132 is connected to the vehicle power grid system of the passenger vehicle; the control module 131 closes the first switch module 132 after receiving a collision signal, and the electric energy of the capacitor bank 120 is output to the vehicle power grid system.

[0070] Specifically, the supercapacitor 121 includes, but is not limited to, an electric double layer supercapacitor and a pseudocapacitor type supercapacitor.

[0071] The control module 131 can be implemented by an existing control chip or by building a circuit (as Figure 9 shown). For the built circuit, reference can be made to the subsequent embodiments and will not be elaborated here.

[0072] The first switch module 132 includes a first MOS transistor. The control terminal of the first MOS transistor is connected to the control module, the input terminal of the first MOS transistor is connected to the capacitor bank, and the output terminal of the first MOS transistor is connected to the vehicle power grid system. Specifically, the first MOS transistor described in the present utility model is a PMOS transistor or an NMOS transistor. When the first MOS transistor is a PMOS transistor, the gate of the PMOS transistor is the control terminal, the source of the PMOS transistor is the input terminal, and the drain of the PMOS transistor is the output terminal. When the first MOS transistor is an NMOS transistor, the gate of the NMOS transistor is the control terminal, the drain of the NMOS transistor is the input terminal, and the source of the NMOS transistor is the output terminal.

[0073] The collision sensing device includes: a collision sensor, an airbag trigger sensor, etc. The collision sensing device will send out a collision signal during a collision. Specifically, when a vehicle collision occurs, generally the airbag detonation time is less than 30 ms, and the collision calculation time of the airbag controller (ACU) is less than 10 ms. Even when the power supply is cut off, there is a built-in storage capacitor in the ACU, and a large capacitor is embedded in the ACU. During the power-down state of the ACU, it can still ensure normal operation for a period of time, ensuring the normal operation of the ACU and the normal detonation of the airbag at the relevant positions.

[0074] When the front collision sensor and the main sensor inside the ACU detect a collision within 10 ms, they will send out a collision signal (network and redundant hard wire).

[0075] In this embodiment, by configuring a current supplement device on the passenger vehicle, in the case where the vehicle power grid is damaged and powered off due to a vehicle collision, it can supply power to the cockpit power grid for a period of time, ensuring the normal driving of the relevant module logic in the cockpit after the vehicle collision. For example, opening the door from the outside, lighting the lights in the cockpit, sending out a distress signal, etc., which provides help for rescue and improves user safety and user experience. Specifically, when applied, the current supplement device can also strongly supplement the static current of the vehicle power grid after the vehicle is normally powered off, ensuring the normal operation of the vehicle.

[0076] In an embodiment of the present utility model, as Figure 2 shown, there is a heat-fixing adhesive 122 provided between the supercapacitors 121, which is used to fix the supercapacitors 121 and dissipate heat from the supercapacitors 121.

[0077] In this embodiment, the heat-fixing adhesive can prevent the supercapacitors 121 from moving and affecting the connection relationship, and at the same time can dissipate heat from the supercapacitors 121, ensuring safe use.

[0078] In an embodiment of the present utility model, as Figure 3 shown, the housing 110 includes a first cover body 111 and a second cover body 112; two opposite sides of the first cover body 111 and the second cover body 112 have an extension structure 113.

[0079] The extension structures 113 of the first cover and the second cover are fixed by bolts and nuts.

[0080] The way of setting the cover in this embodiment can facilitate the disassembly of the housing and the maintenance of the internal components of the housing.

[0081] In some embodiments, the housing is made of aluminum alloy. By designing the aluminum alloy housing, the housing can have the advantages of firmness and high safety.

[0082] In an embodiment of the present utility model, as Figure 2 shown, the control circuit and the capacitor are arranged on the PCB board, and the PCB board is located inside the housing. To facilitate the connection with the vehicle power grid system, a connector 114 is also provided on the housing 110 (as Figure 2 and Figure 3 shown), and the connector 114 includes at least interfaces for connecting the collision sensing device and the vehicle power grid system. In a specific embodiment, as Figure 9 shown, the connector includes interfaces A, B, C, D1, and D2.

[0083] In an embodiment of the present utility model, as Figure 4 shown, in addition to the housing 110, the capacitor bank 120, and the control circuit 130, the current replenishing device for a passenger vehicle further includes: a current detection circuit 140.

[0084] The current detection circuit 140 is arranged between the output end of the first switch module 132 and the connection end of the vehicle power grid system for sensing the output current.

[0085] The control module 131 is also connected to the current detection circuit 140. When the output current is abnormal, the control module 131 cuts off the first switch module 132.

[0086] In some specific embodiments, the current detection circuit is a resistor, such as the current sampling resistor R4 in Figure 9 . The control module 131 analyzes the output current to determine whether the output current is abnormal. Specifically, the abnormality includes output overload or short circuit.

[0087] This embodiment can timely detect the output abnormality and improve the safety of the current replenishing device by cutting off the first switch module when the output abnormality occurs.

[0088] In an embodiment of the present utility model, as Figure 5 shown, it further includes: a first diode 150. The first diode 150 is arranged between the current detection circuit 140 and the vehicle power grid system for isolating the influence of external current on the current replenishing device. At the same time, it can also prevent the influence of reverse connection on the circuit.

[0089] In an embodiment of the present utility model, asFigure 6 As shown, it further includes: a second switch module 160, a first voltage detection circuit 170, and a first resistor 180.

[0090] The control terminal of the second switch module 160 is connected to the control module 131, the input terminal of the second switch module 160 is connected to the vehicle power grid system, and the output terminal of the second switch module 160 is connected to the capacitor bank 120.

[0091] The first voltage detection circuit 170 is disposed on both sides of the capacitor bank 120 for detecting the voltage of the capacitor bank.

[0092] The first resistor 180 is connected in parallel across the second switch module 160.

[0093] The control module 131 is further connected to the first voltage detection circuit 170, disconnects the second switch module 160 when the vehicle power grid system starts to charge the capacitor bank, and closes the second switch module 160 when the voltage of the capacitor bank 120 is greater than the preset voltage.

[0094] This embodiment can realize charging the current supplement device using the vehicle power grid system. And in the initial stage of charging, in order to avoid electrical breakdown caused by excessive current in the capacitor bank, therefore, the second switch module is disconnected when the vehicle power grid system starts to charge the capacitor bank. By setting the first resistor, electrical breakdown caused by excessive current in the capacitor bank can be avoided. The specific charging time can be determined by adjusting the rated value of the first resistor.

[0095] In a specific embodiment, the first voltage detection circuit 170 is a voltage division circuit, such as Figure 9 the resistor R5 and the resistor R6 therein. The voltage of the capacitor bank can sample the voltage of the capacitor bank through R5 / R6. When the voltage of the capacitor bank reaches the preset voltage, the second switch module 160 is closed, so as to charge the voltage of the capacitor bank to the external grid voltage. Among them, the preset voltage can be set according to the actual situation, for example, 70% - 80%, and the present invention does not limit this.

[0096] Furthermore, when the capacitor bank is fully charged, the second switch module 160 is disconnected.

[0097] Figure 6 This is only a specific example. During specific implementation, the current supplement device at least includes a housing 110, a capacitor bank 120, a control circuit 130, a second switch module 160, a first voltage detection circuit 170, and a first resistor 180.

[0098] In an embodiment of the present invention, the second switch module 160 includes: a second MOS transistor. The control terminal of the second MOS transistor is connected to the control module, the input terminal of the second MOS transistor is connected to the vehicle power grid system, and the output terminal of the second MOS transistor is connected to the capacitor bank.

[0099] In one embodiment of the present utility model, as Figure 7 it further includes: a second diode 190, which is arranged between the first resistor 180 and the vehicle power grid system, and when the second diode 190 is turned on, the vehicle power grid system charges the capacitor bank.

[0100] In this embodiment, the arrangement of the second diode can isolate the influence of external current on the module and prevent the influence of reverse connection on the circuit.

[0101] In one embodiment of the present utility model, as Figure 8 shown, it further includes: a third diode 200 and a second voltage detection circuit 210.

[0102] The third diode 200 is connected in series with the second voltage detection circuit 210, and the series branch of the third diode 200 and the second voltage detection circuit 210 is arranged between the node where the current supplement device is connected to the vehicle power grid system and the ground terminal.

[0103] The second voltage detection circuit 210 is connected to the control module 131 and is used to collect the voltage of the vehicle power grid system. When the voltage of the vehicle power grid system is greater than a preset threshold, the control module 131 disconnects the first switch module 132, and when the voltage of the vehicle power grid system is zero, the control module 131 closes the first switch module 132.

[0104] In this embodiment, the arrangement of the second diode can isolate the influence of external current on the module and prevent the influence of reverse connection on the circuit. And through the arrangement of the second voltage detection circuit, the voltage state of the vehicle power grid system can be sensed. When the voltage is abnormal, the capacitor bank supplies power to the vehicle power grid, thereby increasing the usage duration of the passenger vehicle.

[0105] In one embodiment of the present utility model, the super capacitor in the battery pack is 2.5V / 120F. Assuming there are five super resistors in the battery pack, the voltage of the battery pack is 2.5V * 5 = 12.5V. Assuming the capacity is 120F and the working voltage is 7.2V - 16V. The charge of the fully charged capacitor bank is Q1 = 12.5V * 120F;

[0106] Let the discharge end voltage be 8V; the end charge is Q2, Q2 = 8V * 120F; the discharge charge is Qf = (Q1 - Q2) = 4.5V * 120F; Qf = If * T = 4.5V * 120F.

[0107] If If = 10A, then T = 54s;

[0108] If If = 5A, then T = 108s;

[0109] If the discharge current is 10A, this module can continuously discharge externally for 54s;

[0110] If the discharge current is 5A, this module can continuously discharge for 108s.

[0111] According to the above external continuous discharge time, power is supplied to the vehicle's power grid system, which can meet the requirements of turning on the interior lights, opening the four-door door locks, and driving the TBOX emergency call logic (if there are requirements for the flashing of relevant exterior lights for a period of time, the supercapacitor capacity needs to be increased). Specifically, it can achieve: opening the door locks twice; the emergency call system sends a distress signal through the 4G / 5G network in the TBOX; the interior lights are turned on, and the turn signals flash twice.

[0112] In an embodiment of the present invention, a current replenishment device for a passenger vehicle is provided, as Figure 9 shown, including: a control module, a first switching MOS1, a second switching MOS2, a current-limiting pre-charge resistor R1, a current sampling resistor R4, a first voltage detection circuit composed of resistors R5 and R6, a second voltage detection circuit composed of resistors R2 and R3, a capacitor bank, a first diode DIO1, a second diode DIO2, and a third diode DIO3.

[0113] The control module includes: a microprocessing unit MCU, a digital filter, an analog filtering unit, a MOS driving unit, an amplifier, an A / D conversion unit, a crystal oscillator reset watchdog unit, a low-dropout linear voltage regulator unit LDO, and a switching power supply.

[0114] The microprocessing unit MCU is connected to other units for coordinating the work of other units. The digital filter is used for filtering the digital collision signal received at interface D2. The filtering circuit is used for filtering the analog collision signal received at interface D1, and the A / D unit connected to the filtering circuit is used for converting the analog signal into a digital signal. The MOS driving unit is used for driving the MOS switch to close or open under the control of the microprocessing unit MCU. The amplifier is used for amplifying the voltage collected across the current sampling resistor R4, and the A / D unit connected to the amplifier is used for performing analog-to-digital conversion on the amplified voltage.

[0115] The node between resistors R2 and R3 is connected to the control module, so that the control module can obtain the sampling voltage V1, and directly measure the voltage of the vehicle's generator or the DCDC 12V battery system (i.e., the vehicle power grid system connected to interface A) through the sampling voltage V1. The node between resistors R5 and 6 is connected to the control module, so that the control module can obtain the sampling voltage V2, and measure the voltage of the capacitor bank through the sampling voltage V2. Specifically, during implementation, the sampling voltage V1 and the sampling voltage V2 enter the I / O interface of the microcontroller unit MUC through the A / D module in the control module.

[0116] Both ends of the current sampling resistor R4 are connected to the control module. The control module amplifies the voltage signal at both ends of the current sampling resistor R4 and then performs A / D conversion. The microprocessing unit MCU determines the output current magnitude of the battery pack, thereby realizing the monitoring of the output current of the battery pack. In the case of overload or short circuit of the battery pack output, the output of the first switch MOS1 is quickly cut off.

[0117] The capacitor bank includes five supercapacitors with a voltage of 2.5V and a capacitance of 120F. The supercapacitors are connected in series. The maximum voltage of the capacitor bank is 12.5V.

[0118] Interfaces D1 and D2 are connected to the airbag controller, and are respectively used to receive the hard-wired collision signal (analog) and the hard-wired digital collision signal (digital) of the airbag controller. Specifically, in implementation, the signals of D1 and D2 are determined according to the redundant collision signal type of the airbag controller.

[0119] Interfaces A and C are connected to the vehicle power grid system. In a specific embodiment, interface A is connected to the vehicle 15+ power grid system, and interface C is connected to the vehicle 30+ power grid system. Among them, the 15+ power grid system and the 30+ power grid system are obtained by converting the vehicle high-voltage battery system. The capacitor bank is charged by the vehicle power grid system through interface A, and the vehicle power grid system is powered by the capacitor bank through interface C. Interface B is connected to the vehicle body ground.

[0120] The input end of the first diode DIO1 is connected to the current sampling resistor R4, and the output end of the first diode DIO1 is connected to interface C. The input end of the second diode DIO2 is connected to node A, and the output end of the second diode DIO2 is connected to the current-limiting pre-charge resistor R1. The input end of the third diode DIO3 is connected to node A, and the output end of the third diode DIO3 is connected to the current-limiting pre-charge resistor R1. Through DIO1, DIO2 and DIO3, the influence of external current on the module can be blocked, and the influence of reverse connection on the circuit can be prevented.

[0121] When the passenger car current supplement device provided in this embodiment is applied, it includes the following states:

[0122] (1) Normal working condition

[0123] When the whole vehicle is running normally, the vehicle generator / DCDC 12V battery system (i.e., the vehicle power grid system connected to interface A) charges the super capacitor through the second diode DIO2 and the current-limiting pre-charge resistor R1. The charging time can be determined by adjusting the rated value of the current-limiting pre-charge resistor R1. To avoid the super capacitor being broken down by excessive current at the beginning of charging, therefore, at the initial stage of charging, the second switch MOS2 is controlled to be off, and the capacitor bank is charged through the current-limiting pre-charge resistor R1 circuit. When the voltage of the capacitor bank reaches a certain threshold (for example, 70% - 80%), the second switch MOS2 is controlled to be on, and the voltage of the capacitor bank is charged to the external power grid voltage (V power grid voltage - 0.6V).

[0124] The voltage of the capacitor bank can be monitored at any time by sampling the power grid through resistor R5 and resistor R6. When the voltage of the capacitor bank reaches the maximum voltage (for example, 12.5V), the second switch MOS2 is controlled to be off.

[0125] When the sampled voltage V1 is higher than the set threshold, it indicates that the vehicle power grid is operating normally, and there is no need for the capacitor bank to supply power to the vehicle power grid. Here, the first switch MOS1 is not turned on. Due to the isolation of the second diode DIO2, the current direction can only flow from the vehicle power grid to the super capacitor.

[0126] In addition, since the vehicle power grid voltage connected to node A is 14V, therefore, the total voltage drop of the second diode DIO2 and the current-limiting pre-charge resistor R1 should be 1.5V. Based on this, the rated value of the current-limiting pre-charge resistor R1 is designed. After the charging voltage of the capacitor bank reaches 2.5 x 5 = 12.5V, the voltage across the second diode DIO2 is less than the conduction voltage requirement of the second diode DIO2, and the capacitor charging is completed.

[0127] In specific applications, node A is connected to the vehicle 12V battery system, and the capacitor bank can also be used as a filtering module for the vehicle power grid system.

[0128] (2) Vehicle power-off state

[0129] When the vehicle 15+ controls the 12V battery system to power off, the sampled voltage V1 is zero. At this time, the microprocessor unit MCU of the control module drives the first switch MOS1 to be on, so that the capacitor bank supplies power to the vehicle power grid (30+), and then supplies static current to the 12V battery system. When the sampled voltage V2 is lower than the end voltage of the battery pack, the microprocessor unit MCU stops driving the first switch MOS1, that is, turns off the first switch MOS1.

[0130] (3) At the moment of a passenger car collision

[0131] When the vehicle collides, the airbag deployment time is generally less than 30ms, and the airbag controller completes the collision calculation time in less than 10ms. Even if the vehicle power is cut off, the built-in storage capacitor of the airbag controller can still ensure normal operation for a period of time when the airbag controller is powered off, so that the airbags and safety points in the relevant positions can be deployed normally.

[0132] The collision sensor at the front end of the passenger car and the main sensor inside the airbag controller will send a collision signal within 10ms (sent through the network or redundant hard wires) when a collision occurs.

[0133] After receiving the collision signal through interfaces D1 and D2, the control module processes it and issues a command to activate the first switch MOS1. This command turns on the first switch MOS1, allowing the capacitor bank to supply power to the vehicle's power grid, thereby ensuring the proper activation of relevant collision safety logic after the collision. This logic includes: unlocking all four doors twice, sending an emergency call through the TBOX's 4G / 5G network, activating the interior lights, and flashing the turn signals.

[0134] The current supplement device for a passenger car provided in this embodiment can achieve the following technical effects:

[0135] 1. When the vehicle collides, the current supplement device can supply power to the vehicle's power grid for a period of time even if the vehicle's power grid is damaged or powered off, ensuring normal driving of the relevant post-collision logic.

[0136] 2. The current supplement device can effectively supplement the static current of the vehicle's power grid after the vehicle is powered off normally.

[0137] 3. The capacitor bank in the current supplement device can also perform unidirectional filtering on the surge of the entire vehicle.

[0138] The control module in the present invention is a transistor element with no mechanical delay. Theoretically, its reaction speed and driving speed are at the speed of light. However, due to parasitic inductance and capacitance of related components, the speed is slowed down. However, it still executes in a time period of one hundredth of a microsecond. Therefore, it can supply power to the vehicle power network in a timely manner. In the event of a power outage in the vehicle network, the post-collision safety logic can be driven in a timely manner within a short period of time.

[0139] In one embodiment of the present invention, a passenger car is provided, comprising: the current supplement device described in any of the above embodiments. The passenger car may also include existing components of existing passenger cars.

[0140] Specific embodiments are applied in the present utility model to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present utility model.

Claims

1. A current supplement device for a passenger car, characterized in that, Including: A housing, a capacitor bank, and a control circuit. The capacitor bank and the control circuit are arranged inside the housing, and the housing is arranged on the cockpit floor of the passenger car. One end of the capacitor bank is grounded, and it includes a plurality of supercapacitors connected in series for providing supplementary electric energy. The control circuit includes a control module and a first switch module. The control module is connected to the collision sensing device of the passenger car. The control end of the first switch module is connected to the control module, the input end of the first switch module is connected to the capacitor bank, and the output end of the first switch module is connected to the vehicle power grid system of the passenger car. The control module closes the first switch module after receiving a collision signal, and the electric energy of the capacitor bank is output to the vehicle power grid system.

2. The current supplementing device according to claim 1, wherein There is solid heat-conducting glue between the supercapacitors for fixing the supercapacitors and dissipating heat from the supercapacitors.

3. The current supplementing device according to claim 1, characterized in that The first switch module includes: a first MOS transistor. The control end of the first MOS transistor is connected to the control module, the input end of the first MOS transistor is connected to the capacitor bank, and the output end of the first MOS transistor is connected to the vehicle power grid system.

4. The current supplementing device according to claim 1, wherein, It further includes: A current detection circuit. The current detection circuit is arranged between the output end of the first switch module and the connection end of the vehicle power grid system for sensing the output current. The control module is also connected to the current detection circuit. When the output current is abnormal, the control module cuts off the first switch module.

5. The current supplementing device according to claim 4, characterized in that, It further includes: A first diode arranged between the current detection circuit and the vehicle power grid system for isolating the influence of external current on the current supplement device.

6. The current supplementing device according to claim 1, wherein It further includes: A second switch module, a first voltage detection circuit, and a first resistor. The control end of the second switch module is connected to the control module, the input end of the second switch module is connected to the vehicle power grid system, and the output end of the second switch module is connected to the capacitor bank. The first voltage detection circuit is arranged on both sides of the capacitor bank for detecting the voltage of the capacitor bank. The first resistor is connected in parallel across the second switch module. The control module is also connected to the first voltage detection circuit. When the vehicle power grid system starts to charge the capacitor bank, the control module disconnects the second switch module. When the voltage of the capacitor bank is greater than the preset voltage, the control module closes the second switch module.

7. The current supplementing device according to claim 6, characterized in that, The second switch module includes: a second MOS transistor. The control end of the second MOS transistor is connected to the control module, the input end of the second MOS transistor is connected to the vehicle power grid system, and the output end of the second MOS transistor is connected to the capacitor bank.

8. The current supplementing device according to claim 6, characterized in that It further includes: A second diode arranged between the first resistor and the vehicle power grid system. When the second diode conducts, the vehicle power grid system charges the capacitor bank.

9. The current supplementing device according to claim 6, characterized in that, It further includes: a third diode and a second voltage detection circuit. The third diode and the second voltage detection circuit are connected in series, and the series branch of the third diode and the second voltage detection circuit is arranged between the node where the current supplement device is connected to the vehicle power grid system and the ground terminal. The second voltage detection circuit is connected to the control module and is used to collect the voltage of the vehicle power grid system. When the voltage of the vehicle power grid system is greater than a preset threshold, the control module disconnects the first switch module, and when the voltage of the vehicle power grid system is zero, the control module closes the first switch module.

10. The current supplementing device according to claim 1, characterized in that, The housing includes a first cover body and a second cover body; two opposite sides of the first cover body and the second cover body have an extension structure; The extension structure of the first cover body and the extension structure of the second cover body are fixed by bolts and nuts.

11. The current supplementing device according to claim 10, wherein The housing is made of aluminum alloy.

12. A passenger car, characterized in that, It includes the current supplement device according to any one of claims 1 to 11.

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