Auxiliary power supply control circuit for new energy automobile
By using a wake-up signal detection and sustaining circuit and a voltage feedback signal control circuit, the problem of limited battery power in new energy vehicles is solved, achieving efficient control of the auxiliary power supply and reducing the size and cost of the control circuit.
Patent Information
- Application Number
- CN202423271884.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-30
AI Technical Summary
New energy vehicle batteries have limited capacity, and traditional auxiliary power wake-up/sleep control circuits require large MOSFETs, which leads to limitations in PCB design and high material costs.
A wake-up signal detection and sustaining circuit and a voltage feedback signal control circuit are adopted. By processing the wake-up signal in a branch circuit, the MOSFET on the auxiliary power supply input circuit is eliminated, and the presence or absence of the wake-up signal controls the state of the auxiliary power supply.
It enables the control of the auxiliary power supply's wake-up/sleep state, reducing the size and material cost of the control circuit and optimizing the PCB design.
Smart Images
Figure CN223590546U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of new energy automobile, especially to an auxiliary power supply control circuit for new energy automobile. BACKGROUND
[0002] With the development of new energy vehicles, the electronic components that need to use 12V or 24V battery power on the vehicle as internal auxiliary power supply are also increasing. However, due to the limited weight of the vehicle and the large size of the battery, new energy vehicles can only reduce the number of batteries equipped as much as possible under the premise of meeting the battery power supply voltage value according to the selected vehicle low-voltage system level (12V system or 24V system). This also makes the amount of electricity that the battery on the vehicle can store limited, so that in the vehicle off state, only relying on the remaining power in the battery, the auxiliary power supply can only be provided for a limited time. Once the power is depleted by electronic components, the battery will be in a power deficit state, affecting the subsequent use of the vehicle.
[0003] In view of the limited amount of electricity stored in the battery on the vehicle, most new energy vehicle electronic components on the market currently have auxiliary source wake-up / sleep control circuits. Under the control of the wake-up / sleep control circuit, only after receiving the wake-up signal from the vehicle, the auxiliary power supply in each electronic component will enter the wake-up state from the sleep state. In the normal sleep state, the self-power consumption of the electronic component will be maintained at the minimum value, i.e. the battery power is maintained at the minimum value, thereby avoiding the rapid consumption of battery power and avoiding the power deficit of the battery.
[0004] The traditional auxiliary power supply wake-up / sleep control circuit mainly realizes it by connecting a MOS tube in series on the auxiliary power supply input loop, and the wake-up signal processed by the wake-up / sleep control circuit is used as the driving signal of the MOS tube. By the presence / absence of the wake-up signal, the conduction / cutoff of the MOS tube is controlled, i.e. whether the battery power supply is input to the internal auxiliary power supply circuit of the electronic component, thereby realizing the purpose of controlling whether the component is in a sleep state or a wake-up state. However, if this traditional technical solution is used, the core device (MOS tube) used in the solution needs to be strictly selected according to the working current of the auxiliary power supply, otherwise the MOS tube will be at risk of overcurrent damage. The larger the drain-source current value (ID) of the MOS tube, the larger the device package, and the more PCB single board space it occupies, ultimately leading to limited PCB design and high material cost. UTILITY MODEL CONTENTS
[0005] The main purpose of the utility model is to provide an auxiliary power supply control circuit for new energy automobile, which aims to solve the above technical problems.
[0006] In order to achieve the above object, the utility model provides a kind of auxiliary power supply control circuit for new energy vehicle, including the wake-up signal detection maintenance circuit and voltage feedback signal control circuit of connection;The wake-up signal detection maintenance circuit includes signal processing unit and the first signal feedback unit and second signal feedback unit being connected with the signal processing unit, the signal processing unit is used to receive the wake-up signal issued by whole vehicle and is based on the wake-up signal and is divided into two ways after voltage suppression respectively transmission to the first signal feedback unit and the second signal feedback unit, the second signal feedback unit and the voltage feedback signal control circuit are connected.
[0007] In an embodiment, the signal processing unit includes a transient suppression diode and a first voltage stabilizing diode, the first end of the transient suppression diode is connected with a signal input source, the second end of the transient suppression diode is grounded, the first end of the first voltage stabilizing diode is connected with the first end of the transient suppression diode, and the second end of the first voltage stabilizing diode is connected with the first signal feedback unit and the second signal feedback unit.
[0008] In an embodiment, the first signal feedback unit includes a first resistor, the first end of the first resistor is connected with the second end of the voltage stabilizing diode, and the second end of the first resistor is connected with the signal output interface.
[0009] In an embodiment, the second signal feedback unit includes a second resistor, a third resistor, a first capacitor and a first triode, the first end of the second resistor is connected with the second end of the first resistor, the second end of the second resistor is connected with the first end of the first triode, the first end of the third resistor and the first end of the first capacitor are both connected with the first end of the first triode, the second end of the third resistor and the second end of the first capacitor are both connected with the second end of the first triode, and the third end of the first triode is connected with the voltage feedback signal control circuit.
[0010] In an embodiment, the voltage feedback signal control circuit includes a first variable interface and a second variable interface, the first variable interface is connected with the second signal feedback unit, and the second variable interface is connected with the first variable interface through a second voltage stabilizing diode and a second triode in series.
[0011] In an embodiment, the voltage feedback signal control circuit further includes a fourth resistor, the first end of the fourth resistor is connected with the first end of the second voltage stabilizing diode, and the second end of the fourth resistor is grounded.
[0012] In an embodiment, the voltage feedback signal control circuit further includes a second capacitor, the first end of the second capacitor is connected with the first end of the second voltage stabilizing diode, and the second end of the second capacitor is grounded.
[0013] In an embodiment, the voltage feedback signal control circuit further comprises a fifth resistor, a first end of the fifth resistor is connected with the second variable interface, and a second end of the fifth resistor is grounded.
[0014] In an embodiment, a sixth resistor is connected in series between the second variable interface and the second triode.
[0015] In an embodiment, the voltage feedback signal control circuit further comprises an auxiliary source input signal interface, the auxiliary source input signal interface is connected with a sixth resistor and connected with the second variable interface.
[0016] In the technical scheme of the utility model, the auxiliary power supply control circuit for new energy automobile includes the wake-up signal detection maintaining circuit and the voltage feedback signal control circuit which are connected, the wake-up signal detection maintaining circuit includes a signal processing unit and a first signal feedback unit and a second signal feedback unit which are connected with the signal processing unit, the signal processing unit is used for receiving the wake-up signal which is sent by the whole vehicle and is divided into two paths after voltage suppression based on the wake-up signal and is transmitted to the first signal feedback unit and the second signal feedback unit respectively, the second signal feedback unit is connected with the voltage feedback signal control circuit. Therefore, in the technical scheme, one path is output to DSP to detect whether the wake-up signal exists in real time. The other path is input as a driving signal, so that the purpose of controlling whether the signal is grounded according to whether the wake-up signal exists is achieved, the effect of controlling the auxiliary source to be in the wake-up state / sleep state is realized, the MOS tube which is connected in series on the auxiliary power supply input loop is saved, the overall volume of the control circuit is reduced, the PCB occupied space is reduced, and the material cost of the control circuit is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in the drawings without creating labor.
[0018] Figure 1 It is the circuit diagram of the auxiliary power supply control circuit for new energy automobile of the utility model embodiment;
[0019] Figure 2 It is the circuit diagram of the wake-up signal detection maintaining circuit of the utility model embodiment;
[0020] Figure 3 It is the circuit diagram of the voltage feedback signal control circuit of the utility model embodiment.
[0021] The drawings are explained as follows: 10, wake-up signal detection maintenance circuit; 11, signal processing unit; 12, first signal feedback unit; 13, second signal feedback unit; 20, voltage feedback signal control circuit; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; C1, first capacitor; C2, second capacitor; D1, transient suppression diode; D2, first voltage stabilizing diode; D3, second voltage stabilizing diode; Q1, first triode; Q2, second triode; P1, first variable interface; P2, second variable interface.
[0022] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0024] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.
[0025] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0026] In addition, the technical solutions of the various embodiments of the utility model can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0027] The utility model provides a kind of auxiliary power supply control circuit for new energy automobile.
[0028] AsFigure 1 The utility model discloses an auxiliary power supply control circuit for new energy vehicle includes the wake -up signal detection maintenance circuit 10 and voltage feedback signal control circuit 20 of interconnection as illustrated, the utility model discloses an auxiliary power supply control circuit for new energy vehicle, including wake -up signal detection maintenance circuit 10 and voltage feedback signal control circuit 20 that are connected, wake -up signal detection maintenance circuit 10 includes signal processing unit 11 and with first signal feedback unit 12 and second signal feedback unit 13 of signal processing unit 11 connection, signal processing unit 11 is used to receive the wake -up signal that whole vehicle sends and is based on wake -up signal and is divided into two ways with voltage suppression and is transmitted to first signal feedback unit 12 and second signal feedback unit 13 respectively, second signal feedback unit 13 with voltage feedback signal control circuit 20 is connected.
[0029] In the embodiment, one way is output to DSP to detect whether the wake -up signal exists in real time, and the other way is input as a driving signal, so that the purpose of controlling whether the signal is grounded according to whether the wake -up signal exists is achieved, the effect of controlling the auxiliary power supply to be in the wake -up state or the sleep state is realized, the MOS tube in series on the auxiliary power supply input loop is saved, the overall volume of the control circuit is reduced, the PCB occupied space is reduced, and the material cost of the control circuit is reduced.
[0030] Please refer to Figure 2 Signal processing unit 11 includes transient suppression diode D1 and first voltage stabilizing diode D2, the first end of transient suppression diode D1 is connected with a signal input source, the second end of transient suppression diode D1 is grounded, the first end of first voltage stabilizing diode D2 is connected with the first end of transient suppression diode D1, and the second end of first voltage stabilizing diode D2 is connected with first signal feedback unit 12 and second signal feedback unit 13.
[0031] First signal feedback unit 12 includes first resistor R1, the first end of first resistor R1 is connected with the second end of voltage stabilizing diode, and the second end of first resistor R1 is connected with a signal output interface.
[0032] Second signal feedback unit 13 includes second resistor R2, third resistor R3, first capacitor C1 and first triode Q1, the first end of second resistor R2 is connected with the second end of first resistor R1, the second end of second resistor R2 is connected with the first end of first triode Q1, the first end of third resistor R3 and first capacitor C1 are both connected with the first end of first triode Q1, the second end of third resistor R3 and the second end of first capacitor C1 are both connected with the second end of first triode Q1, and the third end of first triode Q1 is connected with voltage feedback signal control circuit 20.
[0033] The wake-up signal from the whole vehicle is input to the wake-up signal maintaining circuit by the +24V_ON network. Since the wake-up signal is an external input signal to the relative electronic components, the wake-up signal input to the detection maintaining circuit is first protected from surge peak voltage and surge peak current by the transient suppression diode D1 to avoid impacting the subsequent circuit components.
[0034] Since the wake-up signal from the whole vehicle is usually a 12V or 24V high-level signal, which is higher than the input range of the subsequent processing circuit of the wake-up signal detection maintaining circuit 10, the first voltage stabilizing diode D2 is further used to reduce the amplitude, so that the subsequent processing circuit can process it. After the transient suppression diode D1 and the first voltage stabilizing diode D2, the wake-up signal is input to the subsequent processing circuit in two ways. One way is to pass through the first resistor R1 and then output to the DSP through the network +24V_ON_LOSE to detect whether the wake-up signal exists in real time. The other way is to pass through the second resistor R2 and the third resistor R3 to divide the voltage and input to the base of the first transistor Q1 as the driving signal of the first transistor Q1, so as to control whether the first variable interface P1 (DO1) is grounded according to the presence or absence of the wake-up signal +24V_ON. In addition, in the state of no wake-up signal input, the first variable interface P1 can also be directly grounded through an external circuit (DSP control circuit) to achieve the same effect of grounding the first variable interface P1 in the presence of the wake-up signal.
[0035] Please refer to Figure 3 The voltage feedback signal control circuit 20 includes a first variable interface P1 and a second variable interface P2, the first variable interface P1 is connected with the second signal feedback unit 13, and the second variable interface P2 is connected with the first variable interface P1 through the second voltage stabilizing diode D3 and the second transistor Q2 in series.
[0036] The voltage feedback signal control circuit 20 further includes a fourth resistor R4, the first end of the fourth resistor R4 is connected with the first end of the second voltage stabilizing diode D3, and the second end of the fourth resistor R4 is grounded.
[0037] The voltage feedback signal control circuit 20 further includes a second capacitor C2, the first end of the second capacitor C2 is connected with the first end of the second voltage stabilizing diode D3, and the second end of the second capacitor C2 is grounded.
[0038] The voltage feedback signal control circuit 20 further comprises a fifth resistor R5, a first end of the fifth resistor R5 is connected with the second variable interface P2, and a second end of the fifth resistor R5 is grounded. A sixth resistor R6 is connected in series between the second variable interface P2 and the second transistor Q2. The voltage feedback signal control circuit 20 further comprises an auxiliary source input signal interface, the sixth resistor R6 is connected with the auxiliary source input signal interface and the second variable interface P2.
[0039] The DO1 is output by the wake-up signal detection maintaining circuit 10, that is, the input of the voltage feedback signal control circuit 20. As described above, the DO1 is equivalent to be grounded in the state of the wake-up signal (+24_ON) input, and the DO1 can also be grounded by the external circuit (DSP control circuit) in the state of no wake-up signal input. If there is no wake-up signal input and the external circuit does not ground the DO1, the DO1 can be regarded as a suspended state, and has no control effect on the voltage feedback signal control circuit 20.
[0040] If the wake-up signal of the whole vehicle is received by the auxiliary source wake-up / sleep control circuit, the DO1 can be grounded by the upper wake-up signal detection maintaining circuit 10, that is, the input end of the second voltage stabilizing diode D3 is directly grounded. In this state, the second transistor Q2 has no driving signal input, that is, the second transistor Q2 is not turned on, and the auxiliary source voltage feedback signal P_Dissable is grounded through the seventh resistor R7 and the fifth resistor R5. Because the resistance value of the fifth resistor R5 is in the order of MΩ, the auxiliary source voltage feedback signal P_Dissable can be regarded as being unaffected in this state, that is, the auxiliary source is not affected, and the auxiliary source is in the wake-up state. In addition, the DO1 can also be grounded by the external DSP control circuit to achieve the same control effect to maintain the auxiliary source in the wake-up state in the state of no wake-up signal input.
[0041] In the state of no wake-up signal input and no grounding of the DO1 by the external DSP control circuit, the auxiliary source input signal +24VIN can be input to the base electrode of the second transistor Q2 through the second voltage stabilizing diode D3 after being divided by the fourth resistor R4 and the sixth resistor R6 as a driving signal. In this state, the DS electrode of the second transistor Q2 is turned on, that is, the fifth resistor R5 with the resistance value in the order of MΩ is short-circuited, and the voltage feedback signal P_Dissable is grounded only through the seventh resistor R7. Because the seventh resistor R7 in the voltage feedback signal control circuit 20 is selected as a 0Ω resistor, the P_Dissable is directly grounded in this state, and the auxiliary source enters the sleep state through the direct grounding of the P_Dissable.
[0042] In summary, the auxiliary source wake-up / sleep control circuit controls whether the auxiliary source voltage feedback signal P_Dissable is grounded by the presence or absence of the wake-up signal (+24V_ON), and ultimately achieves the effect of controlling the auxiliary source to be in a wake-up state / sleep state, so that the auxiliary source also works normally in the sleep state, and the auxiliary source wake-up time is reduced.
[0043] The above description is only preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.
Claims
1. An auxiliary power supply control circuit for new energy vehicles, characterized in that, The auxiliary power supply control circuit for the new energy vehicle comprises a wake-up signal detection and maintenance circuit (10) and a voltage feedback signal control circuit (20) connected therewith; the wake-up signal detection and maintenance circuit (10) comprises a signal processing unit (11) and a first signal feedback unit (12) and a second signal feedback unit (13) both connected with the signal processing unit (11); the signal processing unit (11) is used for receiving a wake-up signal sent by a whole vehicle and dividing a voltage suppressed based on the wake-up signal into two paths and transmitting to the first signal feedback unit (12) and the second signal feedback unit (13) respectively; the second signal feedback unit (13) is connected with the voltage feedback signal control circuit (20).
2. The auxiliary power supply control circuit for a new energy vehicle according to claim 1, characterized in that, The signal processing unit (11) comprises a transient suppression diode (D1) and a first voltage stabilizing diode (D2); a first end of the transient suppression diode (D1) is connected with a signal input source; a second end of the transient suppression diode (D1) is grounded; a first end of the first voltage stabilizing diode (D2) is connected with a first end of the transient suppression diode (D1); a second end of the first voltage stabilizing diode (D2) is connected with the first signal feedback unit (12) and the second signal feedback unit (13).
3. The auxiliary power supply control circuit for new energy vehicles according to claim 2, characterized in that, The first signal feedback unit (12) comprises a first resistor (R1); a first end of the first resistor (R1) is connected with the second end of the voltage stabilizing diode; a second end of the first resistor (R1) is connected with a signal output interface.
4. The auxiliary power supply control circuit for new energy vehicles according to claim 3, characterized in that, The second signal feedback unit (13) comprises a second resistor (R2), a third resistor (R3), a first capacitor (C1) and a first triode (Q1); a first end of the second resistor (R2) is connected with a second end of the first resistor (R1); a second end of the second resistor (R2) is connected with a first end of the first triode (Q1); a first end of the third resistor (R3) and a first end of the first capacitor (C1) are both connected with a first end of the first triode (Q1); a second end of the third resistor (R3) and a second end of the first capacitor (C1) are both connected with a second end of the first triode (Q1); a third end of the first triode (Q1) is connected with the voltage feedback signal control circuit (20).
5. The auxiliary power supply control circuit for new energy vehicles according to claim 4, characterized in that, The voltage feedback signal control circuit (20) comprises a first variable interface (P1) and a second variable interface (P2); the first variable interface (P1) is connected with the second signal feedback unit (13); the second variable interface (P2) is connected with the first variable interface (P1) through a second voltage stabilizing diode (D3) and a second triode (Q2) connected in series.
6. The auxiliary power supply control circuit for new energy vehicles according to claim 5, characterized in that, The voltage feedback signal control circuit (20) further comprises a fourth resistor (R4); a first end of the fourth resistor (R4) is connected with a first end of the second voltage stabilizing diode (D3); a second end of the fourth resistor (R4) is grounded.
7. The control circuit according to claim 6, wherein The voltage feedback signal control circuit (20) further comprises a second capacitor (C2), a first end of the second capacitor (C2) is connected with a first end of the second voltage stabilizing diode (D3), and a second end of the second capacitor (C2) is grounded.
8. The control circuit according to claim 5, wherein The voltage feedback signal control circuit (20) further comprises a fifth resistor (R5), a first end of the fifth resistor (R5) is connected with the second variable interface (P2), and a second end of the fifth resistor (R5) is grounded.
9. The control circuit according to claim 5, wherein A sixth resistor (R6) is connected in series between the second variable interface (P2) and the second triode (Q2).
10. The control circuit according to claim 5, wherein The voltage feedback signal control circuit (20) further comprises an auxiliary source input signal interface, the auxiliary source input signal interface is connected with the sixth resistor (R6) and connected with the second variable interface (P2).