Charging interface gun pulling wake-up circuit, battery management system and vehicle

Abstract

The utility model provides a charging interface gun pulling wake-up circuit, a battery management system and a vehicle, the charging interface gun pulling wake-up circuit comprises a charging interface unit and a wake-up control unit; the charging interface unit is used for accessing a CC1 signal or an A + signal when a gun is inserted; the input end of the wake-up control unit is connected with the output end of the charging interface unit, and the wake-up control unit is used for generating a wake-up signal for waking up the battery management system when it is detected that the CC1 signal or the A + signal disappears. The charging interface gun pulling wake-up circuit can wake up the BMS when the gun is pulled out, so that the BMS enters a working state and prepares for a user before driving, and therefore, the quality of the whole vehicle and the experience feeling of the user are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, and in particular to a charging interface gun-pulling wake-up circuit. At the same time, the utility model also relates to a battery management system provided with the charging interface gun-pulling wake-up circuit, and a vehicle equipped with the battery management system. Background Art

[0002] BMS (Battery Management System) is the management and control core of the power battery system, responsible for controlling the operating status of the battery and the control of battery charging and discharging. When the electric vehicle is parked, if the battery management system is in working state, it will be in a mode of consuming the power of the lead-acid battery for a long time, which may easily lead to the lead-acid battery being depleted and the vehicle being unable to power up and drive normally. Therefore, when parking is required, the battery management system should be in a sleep state to reduce system power consumption and reduce the power consumption of the lead-acid battery.

[0003] When an electric car in sleep mode needs AC charging or DC charging, the battery management system must be awakened to put it into working mode. According to the GBT18487.1-2015 standard, DC charging can wake up the BMS through CC1 (CC2) or A+ signal. When charging is completed and the BMS enters sleep mode, the owner should also wake up the BMS to work mode when pulling out the gun. However, the BMS of existing power batteries only has the function of waking up by plugging in the charging gun. The BMS enters sleep mode after charging is completed, and there is no function of waking up by pulling out the gun. When the user pulls out the gun, the BMS cannot work. Utility Model Content

[0004] In view of this, the utility model aims to provide a charging interface gun unplugging wake-up circuit, so that the BMS can be woken up when the gun is unplugged, so that the BMS enters a working state.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A charging interface gun-pulling wake-up circuit comprises a charging interface unit and a wake-up control unit;

[0007] The charging interface unit is used to access the CC1 signal or A+ signal when the gun is plugged in;

[0008] The input end of the wake-up control unit is connected to the output end of the charging interface unit, and is used to generate a wake-up signal for waking up the battery management system when it is detected that the CC1 signal or the A+ signal disappears.

[0009] Furthermore, the wake-up control unit includes a first resistor, a capacitor, a second resistor, a third resistor and a MOS tube; the first end of the first resistor is connected to the input end of the wake-up control unit, and the second end of the first resistor is connected to the first end of the capacitor; the first end of the second resistor and the first end of the third resistor are commonly connected to the second end of the capacitor, the second end of the second resistor and the source of the MOS tube are commonly connected to the power supply unit, and the second end of the third resistor is connected to the gate of the MOS tube; the drain of the MOS tube is connected to the output end of the wake-up control unit.

[0010] Furthermore, the wake-up control unit further includes a fourth resistor; a first end of the fourth resistor and a first end of the first resistor are commonly connected to an input end of the wake-up control unit, and a second end of the fourth resistor is grounded.

[0011] Furthermore, the voltage of the charging interface unit when connected to the CC1 signal is 12V, and / or the voltage of the charging interface unit when connected to the A+ signal is 12V; the power supply unit is a 5V power supply.

[0012] Furthermore, the wake-up control unit includes a fifth resistor; the fifth resistor is connected in series between the drain of the MOS tube and the output end of the wake-up control unit, or the first end of the fifth resistor and the drain of the MOS tube are connected to the output end of the wake-up control unit, and the second end of the fifth resistor is grounded.

[0013] Furthermore, the wake-up control unit includes a first resistor, a first capacitor, a second resistor, a third resistor and a transistor; the first end of the first resistor is connected to the input end of the wake-up control unit, and the second end of the first resistor is connected to the first end of the capacitor; the first end of the second resistor and the first end of the third resistor are commonly connected to the second end of the capacitor, the second end of the second resistor and the emitter of the transistor are commonly connected to the power supply unit, and the second end of the third resistor is connected to the base of the transistor; the collector of the transistor is connected to the output end of the wake-up control unit.

[0014] Furthermore, the wake-up control unit further includes a fourth resistor; a first end of the fourth resistor and a first end of the first resistor are commonly connected to an input end of the wake-up control unit, and a second end of the fourth resistor is grounded.

[0015] Furthermore, the charging interface unit includes a first diode and a second diode; the anode of the first diode is connected to the input end of the CC1 signal, the anode of the second diode is connected to the input end of the A+ signal, and the cathode of the first diode and the cathode of the second diode are connected to the output end of the charging interface unit.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The charging interface gun-pulling wake-up circuit described in the utility model can access the CC1 signal or the A+ signal when the gun is inserted by setting the charging interface unit, and can generate a wake-up signal to wake up the BMS when the CC1 signal or the A+ signal is detected through the coordinated setting of the wake-up control unit, thereby achieving the purpose of waking up the BMS when the gun is pulled out, so that the BMS enters the working state, prepares the user before driving, and improves the customer experience.

[0018] Secondly, the voltage of the charging interface unit when connected to the CC1 signal or the A+ signal is 12V, and the power supply unit is a 5V power supply, which is conducive to realizing the on and off of the MOS tube by changing the working voltage, and outputting a high-level signal when it is turned on, that is, a wake-up signal, for waking up the battery management system. The anode of the first diode is connected to the input end of the CC1 signal, the anode of the second diode is connected to the input end of the A+ signal, and the cathode of the first diode and the cathode of the second diode are connected to the output end of the charging interface unit. The first diode and the second diode can be reversely connected to realize circuit protection.

[0019] Another object of the present invention is to provide a battery management system, including the charging interface gun removal wake-up circuit as described above.

[0020] At the same time, the utility model also proposes a vehicle, including a power battery, and the above-mentioned battery management system arranged in the power battery.

[0021] The battery management system and vehicle described in the utility model have the same technical effects as the above-mentioned charging interface gun pull-out wake-up circuit compared to the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the configuration of the charging interface gun-pulling wake-up circuit according to an embodiment of the utility model;

[0024] Figure 2 A circuit diagram of a charging interface gun-pulling wake-up circuit according to an embodiment of the utility model;

[0025] Description of reference numerals:

[0026] 10. Charging interface unit; 20. Wake-up control unit. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0031] Embodiment 1

[0032] This embodiment relates to a charging interface gun pull wake-up circuit, the overall structure is as follows: Figure 1 As shown, the charging interface gun removal wake-up circuit of this embodiment includes a charging interface unit 10 and a wake-up control unit 20. The charging interface unit 10 is used to receive the CC1 signal or the A+ signal when the gun is plugged in. The input end of the wake-up control unit 20 is connected to the output end of the charging interface unit 10, and is used to generate a wake-up signal for waking up the battery management system when it is detected that the CC1 signal or the A+ signal disappears.

[0033] The charging port gun-pulling wake-up circuit generates a wake-up signal for waking up the battery management system when detecting that the CC1 signal or the A+ signal disappears, so that the BMS can be woken up when the gun is pulled out, so that the BMS can quickly enter the working state and prepare for the user before driving, thereby improving the customer experience.

[0034] Based on the above overall introduction, specifically, in this embodiment, as a preferred implementation form, Figure 2As shown, the charging interface unit 10 includes a first diode D1 and a second diode D2. The anode of the first diode D1 is connected to the input end of the CC1 signal, the anode of the second diode D2 is connected to the input end of the A+ signal, and the cathode of the first diode D1 and the cathode of the second diode D2 are connected to the output end of the charging interface unit 10.

[0035] Circuit protection is achieved by reversely connecting the first diode D1 and the second diode D2 to prevent the voltage or current in the circuit from being transmitted to the input end of the reverse CC1 signal or the input end of the A+ signal, thereby improving the circuit stability. In addition, in a specific implementation, the first diode D1 and the second diode D2 can both be voltage regulator diodes.

[0036] In addition, in this embodiment, in order to ensure the reliability of the wake-up control unit 20, as a preferred implementation form, Figure 2 As shown, the wake-up control unit 20 includes a first resistor R1, a capacitor C1, a second resistor R2, a third resistor R3 and a MOS transistor Q1.

[0037] The first end of the first resistor R1 is connected to the input end of the wake-up control unit 20, and the second end of the first resistor R1 is connected to the first end of the capacitor C1. The first end of the second resistor R2 and the first end of the third resistor R3 are connected to the second end of the capacitor C1, the second end of the second resistor R2 and the source of the MOS transistor Q1 are connected to the power supply unit VC5, and the second end of the third resistor R3 is connected to the gate of the MOS transistor Q1. The drain of the MOS transistor Q1 is connected to the output end IO of the wake-up control unit 20.

[0038] It can be understood that in order to make the wake-up control unit 20 reliably output the wake-up signal, after receiving CC1 or A+ disappears, the voltage at the first end of the first resistor R1 (that is, the input end of the wake-up control unit 20) (the voltage at point B) drops instantly, and then the voltage at the second end of the capacitor C1 (the voltage at point A) drops instantly. At this time, the MOS tube Q1 is turned on, and the drain of the MOS tube Q1 (point C) outputs a high level for waking up the BMS. It should also be mentioned that the wake-up control unit 20 here adopts a hardware circuit wake-up method without software logic control, which improves the wake-up speed and reliability.

[0039] In order to further improve the reliability of the wake-up control unit 20, in this embodiment, as a preferred implementation form, the wake-up control unit 20 further includes a fourth resistor R4, and the first end of the fourth resistor R4 and the first end of the first resistor R1 are connected to the input end of the wake-up control unit 20, and the second end of the fourth resistor R4 is grounded. The benefit of setting the fourth resistor R4 is that filtering and voltage stabilization can be performed to improve the stability of the wake-up signal.

[0040] To ensure that the wake-up control unit 20 outputs a high level when the charging gun is unplugged, and outputs a low level when the charging gun is plugged in, in this embodiment, as a preferred implementation form, the voltage when the charging interface unit 10 is connected to the CC1 signal is 12V, and the voltage when the charging interface unit 10 is connected to the A+ signal is also 12V. At the same time, the power supply unit VC5 is a 5V power supply.

[0041] Therefore, when the charging gun is plugged in, the charging interface unit 10 receives the CC1 signal or the A+ signal, and the voltage at point B (the output end of the charging interface unit 10 or the input end of the wake-up control unit 20) is approximately equal to the CC1 or A+ voltage 12V. At this time, the voltage at point A (the second end of the capacitor C1) will be raised, and when the voltage at point A is approximately equal to the voltage at point B, it enters a steady state. During the voltage raising process, since the gate (G pole) voltage of the MOS tube Q1 is greater than the source (S pole) voltage, the drain (D pole) of the MOS tube Q1 will not wake up the BMS during the plug-in process.

[0042] Of course, the voltage when the charging interface unit 10 is connected to the CC1 signal and the voltage when the charging interface unit 10 is connected to the A+ signal, in addition to being 12V at the same time, can also be set to 12V only when the charging interface unit 10 is connected to the CC1 signal or the voltage when the charging interface unit 10 is connected to the A+ signal. In addition to the voltage when the charging interface unit 10 is connected to the CC1 and A+ signals being set to 12V, and the power supply unit VC5 using a 5V power supply, the voltage when the charging interface unit 10 is connected to the CC1 and A+ signals can also be set to other voltage values ​​V1, and the voltage value of the power supply unit VC5 can be set to V2, and the relationship of V1>V2 is maintained. It is only necessary to ensure that the gate (G pole) voltage of the MOS tube Q1 is greater than the source (S pole) voltage during the gun insertion process, and the drain (D pole) of the MOS tube Q1 will not wake up the BMS.

[0043] In addition, in order to further improve the reliability of the wake-up control unit 20, in this embodiment, as a preferred implementation form, the wake-up control unit 20 includes a fifth resistor R5. In specific implementation, the fifth resistor R5 is connected in series between the drain of the MOS tube Q1 and the output terminal IO of the wake-up control unit 20 to facilitate voltage stabilization and circuit protection.

[0044] Alternatively, as another preferred implementation form, in this embodiment, the first end of the fifth resistor R5 and the drain of the MOS tube Q1 are connected to the output terminal IO of the wake-up control unit 20, and the second end of the fifth resistor R5 is grounded to facilitate voltage stabilization and circuit protection.

[0045] It is worth mentioning that the first end and the second end of the first resistor R1 , the capacitor C1 , the second resistor R2 , the third resistor R3 , the fourth resistor R4 and the fifth resistor R5 in this embodiment can be understood as the input end and the output end respectively.

[0046] In addition, in this embodiment, in addition to adopting the above-mentioned structural design, the wake-up control unit 20 can also use a transistor to replace the MOS tube Q1 as a preferred implementation form, and the effect of waking up the BMS by drawing the gun can also be achieved. The specific structural design of the transistor is as follows.

[0047] The wake-up control unit 20 includes a first resistor R1, a first capacitor C1, a second resistor R2, a third resistor R3 and a transistor. The first end of the first resistor R1 is connected to the input end of the wake-up control unit 20, and the second end of the first resistor R1 is connected to the first end of the capacitor C1. The first end of the second resistor R2 and the first end of the third resistor R3 are connected to the second end of the capacitor C1, the second end of the second resistor R2 and the emitter of the transistor are connected to the power supply unit VC5, and the second end of the third resistor R3 is connected to the base of the transistor. The collector of the transistor is connected to the output end IO of the wake-up control unit 20.

[0048] Furthermore, as a further improvement, the wake-up control unit 20 further includes a fourth resistor R4, and a first end of the fourth resistor R4 and a first end of the first resistor R1 are connected to the input end of the wake-up control unit 20, and a second end of the fourth resistor R4 is grounded. At the same time, also as a preferred implementation form, the voltage of the charging interface unit 10 when receiving the CC1 signal is 12V, and the voltage of the charging interface unit 10 when receiving the A+ signal is 12V, and the power supply unit VC5 is a 5V power supply.

[0049] At the same time, the wake-up control unit 20 using a triode further includes a fifth resistor R5. In a specific implementation, the fifth resistor R5 is connected in series between the collector of the triode and the output terminal IO of the wake-up control unit 20, so as to facilitate voltage stabilization and circuit protection. Alternatively, as another preferred implementation form, the first end of the fifth resistor R5 and the collector of the triode are connected to the output terminal IO of the wake-up control unit 20, and the second end of the fifth resistor R5 is grounded, so as to facilitate voltage stabilization and circuit protection.

[0050] Here, based on the design form that only the MOS tube Q1 is replaced by a triode in the wake-up control unit 20, it can be understood that the wake-up working principle when the triode is used is basically the same as that when the MOS tube Q1 is used, so it will not be described in detail.

[0051] The following combination Figure 2 As shown, the working principle of the charging interface gun-pulling wake-up circuit using the MOS tube Q1 in this embodiment is generally described.

[0052] When the charging gun is plugged in, the charging interface unit 10 receives the CC1 signal or the A+ signal, and the voltage at point B (the output end of the charging interface unit 10 or the input end of the wake-up control unit 20) is approximately equal to the CC1 or A+ voltage 12V. At this time, the voltage at point A (the second end of the capacitor C1) will rise, and when the voltage at point A is approximately equal to the voltage at point B, it enters a steady state. During the voltage rise process, since the gate (G pole) voltage of the MOS tube Q1 is greater than the source (S pole) voltage, the drain (D pole) of the MOS tube Q1 will not wake up the BMS during the plug-in process.

[0053] When the charging gun is unplugged, the CC1 or A+ signal disappears, the voltage at point B drops instantly, and then the voltage at point A drops instantly. At this time, the MOS tube Q1 is turned on, point C outputs a high level, and sends the high-level wake-up signal to the BMS through the output terminal IO of the wake-up control unit 20. Then, as the voltage is charged, the voltage at point A will be consistent with the (5V) voltage of the power supply unit VC5. At this time, the MOS tube Q1 is turned off, and point C is a low level. The pulse signal can be controlled by the charging time of the capacitor C1.

[0054] The charging interface gun-pulling wake-up circuit of the present embodiment can access the CC1 signal or the A+ signal when the gun is inserted by setting the charging interface unit 10, and can generate a wake-up signal to wake up the BMS when the CC1 signal or the A+ signal is detected through the coordinated setting of the wake-up control unit 20, thereby achieving the purpose of waking up the BMS when the gun is pulled out, so that the BMS enters the working state, prepares the user before driving, and improves the customer experience.

[0055] Embodiment 2

[0056] This embodiment relates to a battery management system, which includes the charging interface gun-pulling wake-up circuit in Embodiment 1. At the same time, this embodiment also relates to a vehicle, including a power battery, and the above-mentioned battery management system arranged in the power battery.

[0057] The battery pipe system and vehicle of this embodiment, by configuring the charging interface gun pulling wake-up circuit in Example 1, can wake up the BMS when the gun is pulled out after charging is completed, so that the BMS enters the working state, prepares the user before driving, greatly improves the user's vehicle convenience, and is conducive to improving the quality of the entire vehicle and customer experience.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A charging port pull-out wake-up circuit, characterized in that: It includes a charging interface unit and a wake-up control unit; The charging interface unit is used to access the CC1 signal or A+ signal when the gun is plugged in; The input end of the wake-up control unit is connected to the output end of the charging interface unit, and is used to generate a wake-up signal for waking up the battery management system when it is detected that the CC1 signal or the A+ signal disappears.

2. The charging port gun removal wake-up circuit according to claim 1, characterized in that: The wake-up control unit includes a first resistor, a capacitor, a second resistor, a third resistor and a MOS tube; A first end of the first resistor is connected to an input end of the wake-up control unit, and a second end of the first resistor is connected to a first end of the capacitor; The first end of the second resistor and the first end of the third resistor are connected to the second end of the capacitor, the second end of the second resistor and the source of the MOS tube are connected to the power supply unit, and the second end of the third resistor is connected to the gate of the MOS tube; The drain of the MOS tube is connected to the output end of the wake-up control unit.

3. The charging port gun removal wake-up circuit according to claim 2, characterized in that: The wake-up control unit further includes a fourth resistor; A first end of the fourth resistor and a first end of the first resistor are connected to an input end of the wake-up control unit, and a second end of the fourth resistor is grounded.

4. The charging port gun removal wake-up circuit according to claim 2, characterized in that: The voltage of the charging interface unit when connected to the CC1 signal is 12V, and / or the voltage of the charging interface unit when connected to the A+ signal is 12V; The power supply unit is a 5V power supply.

5. The charging port gun removal wake-up circuit according to claim 2, characterized in that: The wake-up control unit includes a fifth resistor; The fifth resistor is connected in series between the drain of the MOS tube and the output end of the wake-up control unit, or the first end of the fifth resistor and the drain of the MOS tube are connected to the output end of the wake-up control unit, and the second end of the fifth resistor is grounded.

6. The charging port gun removal wake-up circuit according to claim 1, characterized in that: The wake-up control unit includes a first resistor, a first capacitor, a second resistor, a third resistor and a triode; A first end of the first resistor is connected to an input end of the wake-up control unit, and a second end of the first resistor is connected to a first end of the capacitor; The first end of the second resistor and the first end of the third resistor are commonly connected to the second end of the capacitor, the second end of the second resistor and the emitter of the transistor are commonly connected to the power supply unit, and the second end of the third resistor is connected to the base of the transistor; The collector of the transistor is connected to the output end of the wake-up control unit.

7. The charging port gun removal wake-up circuit according to claim 6, characterized in that: The wake-up control unit further includes a fourth resistor; A first end of the fourth resistor and a first end of the first resistor are connected to an input end of the wake-up control unit, and a second end of the fourth resistor is grounded.

8. The charging port gun pull-out wake-up circuit according to any one of claims 1 to 7, characterized in that: The charging interface unit includes a first diode and a second diode; The anode of the first diode is connected to the input end of the CC1 signal, the anode of the second diode is connected to the input end of the A+ signal, and the cathode of the first diode and the cathode of the second diode are commonly connected to the output end of the charging interface unit.

9. A battery management system, characterized in that: The invention comprises the charging interface gun-pulling wake-up circuit as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: It comprises a power battery and the battery management system according to claim 9 arranged in the power battery.

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