Wake-up circuit, battery management unit, battery power distribution unit, battery pack and vehicle

Abstract

The utility model discloses a wake-up circuit, a battery management unit, a battery power distribution unit, a battery pack and a vehicle. The wake-up circuit comprises a signal detection circuit, a signal conversion circuit and a signal generation circuit. The signal conversion circuit is used for receiving the CP signal detected by the signal detection circuit and converting the CP signal in a PWM form into a target analog voltage signal; the input end of the signal generation circuit is connected with the output end of the signal conversion circuit, the output end of the signal generation circuit is used for being connected with a wake-up pin of a power circuit in the battery management unit, and the signal generation circuit is used for outputting a first level signal when a target analog voltage signal is not detected and outputting a second level signal when the target analog voltage signal is detected; the power supply circuit is triggered and awakened when the first level signal is switched to the second level signal so as to supply power to a controller in the battery management unit. In this way, when the vehicle is charged and the charging gun is not pulled up, the battery management unit can normally enter the dormancy state, and therefore power consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a wake-up circuit, a battery management unit, a battery power distribution unit, a battery pack, and a vehicle. Background Technology

[0002] When the charging gun is connected to the vehicle's charging port, it outputs a CP (Control Pilot Function) signal in the form of a PWM (Pulse Width Modulation) signal to the signal detection circuit. Currently, the output of the signal detection circuit corresponding to the CP signal is usually directly connected to the wake-up pin of the power circuit (such as the SBC chip) in the Battery Management Unit (BMU). Since the power circuit is woken up to supply power to the controller in the BMU when it detects a signal edge change, thus enabling the BMU to function normally, the PWM CP signal remains present even after charging is complete and the charging gun is still connected. This causes the power circuit to continuously detect signal edge changes, preventing the BMU from entering sleep mode and resulting in unnecessary power consumption. Summary of the Invention

[0003] The main technical problem solved by this application is to provide a wake-up circuit, a battery management unit, a battery power distribution unit, a battery pack, and a vehicle, which can generate only one signal edge change to wake up the power circuit in the battery management unit to supply power to the controller. This prevents the power circuit from being frequently woken up to supply power to the controller when the vehicle is fully charged and the charging gun has not been unplugged, allowing the battery management unit to enter sleep mode normally, thereby reducing power consumption.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a wake-up circuit, the wake-up circuit comprising: a signal detection circuit, the input terminal of which is connected to the charging interface of the vehicle to detect the CP signal; a signal conversion circuit, the input terminal of which is connected to the output terminal of the signal detection circuit, the signal conversion circuit being used to receive the CP signal and convert the PWM form CP signal into a target analog voltage signal; and a signal generation circuit, the input terminal of which is connected to the output terminal of the signal conversion circuit, the output terminal of which is used to connect to the wake-up pin of the power supply circuit in the battery management unit of the vehicle, the signal generation circuit being used to output a first level signal when the target analog voltage signal is not detected, and to output a second level signal when the target analog voltage signal is detected, the power supply circuit being triggered to wake up when the first level signal switches to the second level signal, so as to supply power to the controller in the battery management unit.

[0005] Optionally, the signal conversion circuit is a filter circuit.

[0006] Optionally, the filtering circuit includes a first resistor and a filtering capacitor, wherein the first end of the first resistor is the input terminal of the signal conversion circuit, the second end of the first resistor is connected to the first end of the filtering capacitor, the second end of the first resistor is the output terminal of the signal conversion circuit, and the second end of the filtering capacitor is grounded.

[0007] Optionally, the signal generation circuit includes a comparator, the first input terminal of the comparator being the input terminal of the signal generation circuit, the second input terminal of the comparator being used to receive a reference voltage signal, and the output terminal of the comparator being the output terminal of the signal generation circuit; the comparator is used to generate a first level signal when the input signal at the first input terminal is less than the input signal at the second input terminal, and to generate a second level signal when the input signal at the first input terminal is greater than the input signal at the second input terminal.

[0008] Optionally, the power supply circuit includes a power chip, and the output terminal of the signal generation circuit is connected to the wake-up pin of the power chip. The power chip is triggered to wake up and supply power to the controller when the first level signal switches to the second level signal. Alternatively, the power supply circuit includes a controller area network (CAN) chip and a power chip. The output terminal of the signal generation circuit is connected to the wake-up pin of the CAN chip, and the voltage output terminal of the CAN chip is connected to the wake-up pin of the power chip. The CAN chip is triggered to wake up and the power chip supplies power to the controller when the first level signal switches to the second level signal.

[0009] Optionally, the wake-up circuit also includes an operational amplifier follower circuit, the output of the signal detection circuit is connected to the input of the operational amplifier follower circuit, the output of the operational amplifier follower circuit is connected to the input of the signal conversion circuit, and the output of the operational amplifier follower circuit is also used to connect to the sampling input of the controller.

[0010] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a battery management unit, the battery management unit including: a power supply circuit; a controller, the power supply terminal of the controller being connected to the output terminal of the power supply circuit; and the aforementioned wake-up circuit, which is used to generate a wake-up signal when a PWM-type CP signal is received, so as to wake up the power supply circuit to supply power to the controller.

[0011] Optionally, the battery management unit further includes a pre-charge resistor circuit, a pre-charge switch, and a drive circuit; the first terminal of the pre-charge resistor circuit is connected to the positive voltage terminal of the battery pack, the second terminal of the pre-charge resistor circuit is connected to the first terminal of the pre-charge switch, the second terminal of the pre-charge switch is connected to the pre-charge capacitor in the vehicle's battery power distribution unit, the control terminal of the pre-charge switch is connected to the output terminal of the drive circuit, and the input terminal of the drive circuit is connected to the control signal output terminal of the controller.

[0012] Optionally, the pre-charge resistor circuit includes at least one surface-mount power resistor; and / or, the pre-charge switch is a MOSFET; and / or, the battery management unit further includes a first connector connected to a first terminal of the pre-charge resistor circuit and a second connector connected to a second terminal of the pre-charge switch, the first connector and the second connector being used for plug-in connections with a third connector and a fourth connector in the battery power distribution unit, respectively, the third connector being connected to the positive voltage terminal of the battery pack, and the fourth connector being connected to the pre-charge capacitor; and / or, the battery management unit further includes a circuit board, the circuit elements contained in the battery management unit being integrated on the circuit board.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a battery power distribution unit, the battery power distribution unit including: a housing; the aforementioned battery management unit, and the battery management unit is fixed inside the housing of the battery power distribution unit.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a battery pack, which includes the aforementioned battery power distribution unit.

[0015] To address the aforementioned technical problems, another technical solution adopted in this application is to provide a vehicle, which includes a vehicle body and the aforementioned battery pack. The battery pack is used to supply power to the vehicle body.

[0016] The above scheme includes a wake-up circuit comprising a signal detection circuit, a signal conversion circuit, and a signal generation circuit. The input of the signal detection circuit connects to the vehicle's charging interface to detect the CP signal. The input of the signal conversion circuit connects to the output of the signal detection circuit, receiving the PWM-formatted CP signal and converting it into a target analog voltage signal. The input of the signal generation circuit connects to the output of the signal conversion circuit, and its output connects to the wake-up pin of the power circuit in the vehicle's battery management unit. The signal generation circuit outputs a first-level signal when no target analog voltage signal is detected and a second-level signal when the target analog voltage signal is detected. The power circuit is triggered to wake up when the first-level signal switches to the second-level signal, thus supplying power to the controller in the battery management unit. In this way, since the PWM-form CP signal is converted into a target analog voltage signal after passing through the signal conversion circuit, and the signal generation circuit continuously outputs a second-level signal after detecting the target analog voltage signal, it is possible to generate only one signal edge change to wake up the power circuit in the battery management unit to supply power to the controller during the process from the start of charging to the end of charging by unplugging the charging gun. Furthermore, the power circuit will not be frequently woken up to supply power to the controller when the vehicle is fully charged but the charging gun has not been unplugged, allowing the battery management unit to enter sleep mode normally, thereby reducing power consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the wake-up circuit provided in this application;

[0018] Figure 2 This is a schematic diagram of another embodiment of the wake-up circuit provided in this application;

[0019] Figure 3 This is a schematic diagram of the structure of an embodiment of the battery management unit provided in this application;

[0020] Figure 4 This is a schematic diagram of another embodiment of the battery management unit provided in this application;

[0021] Figure 5 This is a schematic diagram of another embodiment of the battery management unit provided in this application;

[0022] Figure 6 This is a schematic diagram of another embodiment of the battery management unit provided in this application;

[0023] Figure 7 This is a schematic diagram of the structure of an embodiment of the battery power distribution unit provided in this application;

[0024] Figure 8 This is a schematic diagram of the structure of an embodiment of the battery pack provided in this application. Detailed Implementation

[0025] To make the purpose, technical solution and effects of this application clearer and more explicit, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, the term "more" in this article indicates two or more objects; the term "more" indicates at least two objects; and the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] Please see Figure 1 , Figure 1 This is a schematic diagram of an embodiment of the wake-up circuit provided in this application. Figure 1 As shown, the wake-up circuit 10 includes a signal detection circuit 11, a signal conversion circuit 12, and a signal generation circuit 13.

[0028] The input terminal of the signal detection circuit 11 is used to connect to the vehicle's charging interface. Figure 1(The charging interface is not shown in the diagram.) The charging interface is used to connect the charging gun. When the vehicle needs to be charged, the user can insert the charging gun into the charging interface. After the charging gun is inserted into the charging interface, the charging gun will generate a PWM CP signal. The signal detection circuit 11 detects the CP signal and outputs it.

[0029] The input terminal of the signal conversion circuit 12 is connected to the output terminal of the signal detection circuit 11. The signal conversion circuit 12 receives the CP signal and converts the PWM-type CP signal into a target analog voltage signal. The PWM-type CP signal continuously generates signal edge changes, but after passing through the signal conversion circuit 12, it is converted into a smoother target analog voltage signal, which is a high-level signal. In one embodiment, the signal conversion circuit 12 is a filter circuit, which filters out the high-frequency components in the PWM-type CP signal and retains the low-frequency or DC components, thereby converting the PWM-type CP signal into a target analog voltage signal. Furthermore, the amplitude of the converted target analog voltage signal varies depending on the duty cycle of the PWM-type CP signal. For example, the amplitude of the target analog voltage signal ranges from 2V to 5V.

[0030] The input terminal of the signal generation circuit 13 is connected to the output terminal of the signal conversion circuit 12, and the output terminal of the signal generation circuit 13 is used to connect to the power supply circuit in the vehicle's battery management unit. Figure 1 The wake-up pin connection (not shown) is configured. The signal generation circuit 13 outputs a first-level signal when no target analog voltage signal is detected, and a second-level signal when a target analog voltage signal is detected. The first and second level signals have opposite levels; for example, the first level signal is low and the second level signal is high. The power supply circuit is triggered to wake up when the first level signal switches to the second level signal (i.e., a signal edge change occurs) to power the controller in the battery management unit.

[0031] In this embodiment, the wake-up circuit includes a signal detection circuit, a signal conversion circuit, and a signal generation circuit. The input of the signal detection circuit is connected to the vehicle's charging interface to detect the CP signal. The input of the signal conversion circuit is connected to the output of the signal detection circuit to receive the PWM-type CP signal and convert it into a target analog voltage signal. The input of the signal generation circuit is connected to the output of the signal conversion circuit, and its output is connected to the wake-up pin of the power circuit in the vehicle's battery management unit. The signal generation circuit outputs a first-level signal when no target analog voltage signal is detected and a second-level signal when the target analog voltage signal is detected. The power circuit is triggered to wake up when the first-level signal switches to the second-level signal to supply power to the controller in the battery management unit. In this way, since the PWM-form CP signal is converted into a target analog voltage signal after passing through the signal conversion circuit, and the signal generation circuit continuously outputs a second-level signal after detecting the target analog voltage signal, it is possible to generate only one signal edge change to wake up the power circuit in the battery management unit to supply power to the controller during the process from the start of charging to the end of charging by unplugging the charging gun. Furthermore, the power circuit will not be frequently woken up to supply power to the controller when the vehicle is fully charged but the charging gun has not been unplugged, allowing the battery management unit to enter sleep mode normally, thereby reducing power consumption.

[0032] Please see Figure 2 , Figure 2 This is a schematic diagram of another embodiment of the wake-up circuit provided in this application. Figure 2 As shown, the wake-up circuit 10 includes a signal detection circuit 11, a signal conversion circuit 12, and a signal generation circuit 13.

[0033] The signal detection circuit 11 is used to detect the CP signal. The signal detection circuit 11 includes a second resistor R2, a third resistor R3, a switching transistor Q, a fourth resistor R4, and a fifth resistor R5. The first end of the second resistor R2 is the input terminal of the signal detection circuit 11, used to connect to the vehicle's charging interface. The second end of the second resistor R2 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the first end of the switching transistor Q. The second end of the switching transistor Q is grounded, and the control terminal of the switching transistor Q is connected to the controller in the battery management unit. Figure 2 (The controller is not shown in the diagram) is connected, the first end of the fourth resistor R4 is connected to the first end of the third resistor R3, the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is grounded. The first end of the fifth resistor R5 is the output terminal of the signal detection circuit 11, and the first end of the fifth resistor R5 is also used to connect to the sampling input terminal of the controller in the battery management unit (…). Figure 2(The controller connection is not shown in the diagram.) The fourth resistor R4 and the fifth resistor R5 are voltage divider resistors used to divide the detected CP signal to prevent high voltage from damaging the controller. When the controller is powered on, if a CP signal is detected through the signal received at its sampling input terminal, it will enter the AC charging control process, controlling the switch Q to be in the conducting state.

[0034] Optionally, the wake-up circuit 10 further includes an operational amplifier follower circuit 14. The output terminal of the signal detection circuit 11 is connected to the input terminal of the operational amplifier follower circuit 14, and the output terminal of the operational amplifier follower circuit 14 is connected to the input terminal of the signal conversion circuit 12. The output terminal of the operational amplifier follower circuit 14 is also used to connect to the sampling input terminal of the controller. Figure 2 (The controller connection is not shown in the diagram.) The op-amp follower circuit 14 is specifically an op-amp follower. The output signal of the op-amp follower circuit 14 has the same amplitude and phase as the input signal of the op-amp follower circuit 14, and has high input impedance and low output impedance. By setting the op-amp follower circuit 14, on the one hand, the stability of the signal of the input signal conversion circuit 12 can be improved, and on the other hand, the sampling accuracy of the controller can be improved.

[0035] The signal conversion circuit 12 is a filter circuit used to convert the PWM-type CP signal into a target analog voltage signal. Specifically, the filter circuit includes a first resistor R1 and a filter capacitor C1. The first terminal of the first resistor R1 is the input terminal of the signal conversion circuit 12, the second terminal of the first resistor R1 is connected to the first terminal of the filter capacitor C1, the second terminal of the first resistor R1 is the output terminal of the signal conversion circuit 12, and the second terminal of the filter capacitor C1 is grounded. The resistance value of the first resistor R1 and the capacitance value of the filter capacitor C1 can be selected according to the frequency of the PWM-type CP signal and the required filtering effect. It should be noted that this embodiment does not specifically limit the specific circuit structure of the signal conversion circuit 12, as long as it can convert the PWM-type CP signal into a target analog voltage signal. For example, in other embodiments, the signal conversion circuit 12 can also be an integrator circuit constructed from an operational amplifier, etc.

[0036] The signal generation circuit 13 includes a comparator 131. The first input terminal of the comparator 131 is the input terminal of the signal generation circuit 13, the second input terminal of the comparator 131 is used to receive a reference voltage signal, and the output terminal of the comparator 131 is the output terminal of the signal generation circuit. The comparator 131 generates a first-level signal when the voltage of the signal input at the first input terminal is less than the voltage of the signal input at the second input terminal, and generates a second-level signal when the voltage of the signal input at the first input terminal is greater than the voltage of the signal input at the second input terminal. The reference voltage signal is provided by a reference voltage providing circuit, and the amplitude of the reference voltage signal is less than the minimum amplitude of the target analog voltage signal. The first-level signal and the second-level signal have opposite levels.

[0037] In a specific application, comparator 131 is a non-inverting comparator 131. In this case, the first input terminal of comparator 131 is the non-inverting input terminal, and the second input terminal is the inverting input terminal. When no CP signal is generated, the voltage of the input signal at the first input terminal of comparator 131 is less than the amplitude of the reference voltage signal, and comparator 131 outputs a low-level signal. When a CP signal is generated, the CP signal is converted into a target analog voltage signal by the signal conversion circuit 12. The voltage of the input signal at the first input terminal of comparator 131 is greater than the amplitude of the reference voltage signal, and comparator 131 outputs a high-level signal, i.e., a signal edge change occurs. Afterward, as long as the CP signal is present, the output of comparator 131 remains a high-level signal, and no further signal edge changes occur.

[0038] In another specific application, comparator 131 is an inverting comparator 131. In this case, the first input terminal of comparator 131 is the inverting input terminal, and the second input terminal is the non-inverting input terminal. When no CP signal is generated, the voltage of the input signal at the first input terminal of comparator 131 is less than the amplitude of the reference voltage signal, and comparator 131 outputs a high-level signal. When a CP signal is generated, the CP signal is converted into a target analog voltage signal by the signal conversion circuit 12. The voltage of the input signal at the first input terminal of comparator 131 is greater than the amplitude of the reference voltage signal, and comparator 131 outputs a low-level signal, i.e., a signal edge change occurs. Afterward, as long as the CP signal is present, the output of comparator 131 remains a low-level signal, and no further signal edge changes occur.

[0039] In this embodiment, by setting a signal conversion circuit and a signal generation circuit in the wake-up circuit, since the PWM form CP signal is converted into a target analog voltage signal after passing through the signal conversion circuit, and the signal generation circuit continuously outputs a second level signal after detecting the target analog voltage signal, it is possible to convert the CP signal with continuous edge signal change into a signal with single edge change. During the process from the start of charging to the end of charging by unplugging the charging gun, only one signal edge change is generated to wake up the power circuit in the battery management unit to supply power to the controller. When the vehicle is fully charged and the charging gun has not been unplugged, the power circuit will not be frequently woken up to supply power to the controller, so that the battery management unit can enter sleep mode normally, thereby reducing power consumption.

[0040] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of an embodiment of the battery management unit provided in this application. Figure 3As shown, the battery management unit includes a wake-up circuit 10, a power supply circuit 20, and a controller 30. The wake-up circuit 10 includes a signal detection circuit, a signal conversion circuit, and a signal generation circuit. For details of the wake-up circuit 10, please refer to [reference needed]. Figures 1 to 2 The embodiments shown will not be described again here. The output terminal of the wake-up circuit 10 (i.e., the output terminal of the signal generation circuit in the wake-up circuit 10) is connected to the wake-up pin of the power supply circuit 20, and the output terminal of the power supply circuit 20 is connected to the power supply terminal of the controller 30. The wake-up circuit 10 is used to generate a wake-up signal (i.e., signal edge change) when a CP signal in PWM form is received, so as to wake up the power supply circuit 20 to supply power to the controller 30.

[0041] Please see Figure 4 , Figure 4 This is a schematic diagram of another embodiment of the battery management unit provided in this application. Figure 4 The power supply circuit 20 includes a power chip 21 (such as an SBC chip). The output terminal of the wake-up circuit 10 (i.e., the output terminal of the signal generation circuit in the wake-up circuit 10) is connected to the wake-up pin of the power chip 21. The power chip 21 is triggered to wake up and supply power to the controller 30 when it detects a wake-up signal (i.e., the aforementioned first level signal switches to the second level signal). For example, after being triggered to wake up, the power chip 21 outputs a 5V voltage to supply power to the controller 30. It should be noted that in this embodiment, the power chip 21 wakes up when it detects a change in the signal edge.

[0042] Please see Figure 5 , Figure 5 This is a schematic diagram of another embodiment of the battery management unit provided in this application. Figure 5 The power supply circuit 20 includes a controller area network (CAN) chip 22 and a power supply chip 21 (such as an SBC chip). The output terminal of the wake-up circuit 10 (i.e., the output terminal of the signal generation circuit in the wake-up circuit 10) is connected to the wake-up pin of the controller area network chip 22. The voltage output terminal of the controller area network chip 22 is connected to the wake-up pin of the power supply chip 21. The controller area network chip 22 is triggered to wake up when it detects a wake-up signal (i.e., the aforementioned first level signal switches to the second level signal), and wakes up the power supply chip 21 to supply power to the controller 30. For example, after the controller area network chip 22 is triggered to wake up, it outputs a 12V high level to the wake-up pin of the power supply chip 21 to wake up the power supply chip 21. After the power supply chip 21 is triggered to wake up, it outputs a 5V voltage to supply power to the controller 30. It should be noted that in this embodiment, the power supply chip 21 wakes up when it detects a high level.

[0043] Please see Figure 6 , Figure 6 This is a schematic diagram of another embodiment of the battery management unit provided in this application. Figure 3Compared to the battery management unit shown, Figure 6 The battery management unit shown also includes a pre-charge resistor circuit 40, a pre-charge switch 50, and a drive circuit 60. The first terminal of the pre-charge resistor circuit 40 is used to connect to the positive voltage terminal of the battery pack (…). Figure 6 (The positive voltage terminal of the battery pack is not shown in the diagram) is connected, and the second terminal of the pre-charge resistor circuit 40 is connected to the first terminal of the pre-charge switch 50. The second terminal of the pre-charge switch 50 is used to connect to the pre-charge capacitor in the vehicle's battery distribution unit. Figure 6 The connection of the pre-charge capacitor is not shown in the figure. The control terminal of the pre-charge switch 50 is connected to the output terminal of the drive circuit 60, and the input terminal of the drive circuit 60 is connected to the control signal output terminal of the controller 30.

[0044] Furthermore, the battery management unit also includes a circuit board on which the circuit components of the battery management unit are integrated. That is, the wake-up circuit, power supply circuit 20, controller 30, pre-charge resistor circuit 40, pre-charge switch 50, and drive circuit 60 included in the battery management unit are all integrated on the same circuit board. By integrating all the circuit components of the battery management unit onto the same circuit board, the integration level of the battery management unit can be improved.

[0045] Furthermore, the pre-charge resistor circuit 40 includes at least one surface-mount power resistor. The at least one surface-mount power resistor can be connected in series to form the pre-charge resistor circuit 40, or at least one surface-mount power resistor can be connected in parallel to form the pre-charge resistor circuit 40, or at least one surface-mount power resistor can be connected in a combination of series and parallel to form the pre-charge resistor circuit 40. Compared to using cement-type resistors or cast aluminum resistors to form the pre-charge resistor circuit 40, using surface-mount power resistors to form the pre-charge resistor circuit 40 can further reduce the weight and space occupied by the pre-charge resistor circuit 40, thereby further reducing the weight and space occupied by the battery management unit.

[0046] Furthermore, the precharge switch 50 is a MOSFET. Compared to using a precharge relay as the precharge switch 50, using a MOSFET as the precharge switch 50 can, on the one hand, avoid the risk of poor closure caused by the frequent opening and closing of the precharge relay, thus improving stability; on the other hand, it can reduce the weight and space occupied by the precharge switch 50, thereby further reducing the weight and space occupied by the battery management unit.

[0047] Furthermore, the battery management unit also includes a first connector connected to a first terminal of the pre-charge resistor circuit 40 and a second connector connected to a second terminal of the pre-charge switch 50. The first and second connectors are used for plug-in connections with a third and a fourth connector in the battery distribution unit, respectively. The third connector is connected to the positive voltage terminal of the battery pack, and the fourth connector is connected to the pre-charge capacitor. The first, second, third, and fourth connectors are metal connectors. By providing the first and second connectors for the battery management unit and the corresponding third and fourth connectors in the battery distribution unit, a wireless connection between the battery management unit and the battery distribution unit can be achieved, which is beneficial for the automated assembly of the battery management unit.

[0048] Furthermore, the battery management unit also includes an upper cover and a lower cover. The aforementioned circuit board of the battery management unit can be integrated on the lower cover of the battery management unit. The upper cover and the lower cover of the battery management unit are fixed together by a quick-release snap-fit ​​mechanism. This simplifies the assembly process of the battery management unit and improves the assembly efficiency of the battery management unit.

[0049] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of an embodiment of the battery power distribution unit provided in this application. Figure 7 As shown, the battery power distribution unit is specifically a battery power distribution box, including a housing ( Figure 7 (The outer casing is not shown.) The battery management unit is fixed inside the outer casing of the battery power distribution unit. For details regarding the battery management unit, please refer to [link / reference needed]. Figures 3 to 6 The embodiments shown will not be described in detail here. Exemplarily, the battery management unit includes an upper cover and a lower cover, the lower cover of which is fixed to a base inside the housing of the battery power distribution unit.

[0050] In a specific application, the battery management unit is Figure 6 The battery management unit shown includes a pre-charge resistor circuit 40, a pre-charge switch 50, and a drive circuit 60. It also includes a first connector connected to a first terminal of the pre-charge resistor circuit 40 and a second connector connected to a second terminal of the pre-charge switch 50. The battery power distribution unit includes a third connector and a fourth connector. The third connector is connected to the positive voltage terminal of the battery pack, and the fourth connector is connected to the pre-charge capacitor. The third and fourth connectors are pluggably connected to the first and second connectors in the battery management unit, respectively.

[0051] In related technologies, the pre-charge resistor circuit 40, pre-charge switch 50, and pre-charge capacitor are all located within the battery distribution unit and independently located outside the battery management unit. The pre-charge switch 50 in the battery distribution unit and the pre-charge switch 50 in the battery management unit are connected via a wiring harness. In this embodiment, the pre-charge resistor circuit 40 and the pre-charge switch 50 in the battery distribution unit are integrated within the battery management unit. Furthermore, the pre-charge resistor circuit 40 is implemented using a surface-mount power resistor, and the pre-charge switch 50 is implemented using a high-voltage MOSFET. This reduces the weight and space occupied by the pre-charge resistor circuit 40 and the pre-charge switch 50, effectively reducing the weight and space occupied by the battery management unit. Simultaneously, the battery management unit and the battery distribution unit are highly integrated, with a wireless wiring harness connection design. On one hand, this facilitates automated assembly of the battery distribution unit, improving production efficiency and reducing manual operation, thereby reducing costs. On the other hand, it facilitates the miniaturization of the battery distribution unit, reducing the space occupied by the battery pack and enabling compatibility with battery packs of various vehicle models, thus contributing to the standardization of the battery distribution unit.

[0052] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of an embodiment of the battery pack provided in this application. Figure 8 As shown, the battery pack includes a battery power distribution unit. For details regarding the battery power distribution unit, please refer to [link to relevant information]. Figure 7 The embodiments shown are not described in detail here.

[0053] This application also provides a vehicle, which includes a vehicle body and the aforementioned battery pack. The battery pack is used to supply power to the vehicle body.

[0054] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A wake-up circuit, characterized in that, The wake-up circuit includes: A signal detection circuit, the input of which is connected to the vehicle's charging interface to detect control guidance function signals; A signal conversion circuit, wherein the input terminal of the signal conversion circuit is connected to the output terminal of the signal detection circuit, the signal conversion circuit is used to receive the control guidance function signal and convert the control guidance function signal in the form of a pulse width modulation signal into a target analog voltage signal; A signal generation circuit is provided, the input of which is connected to the output of the signal conversion circuit. The output of the signal generation circuit is used to connect to the wake-up pin of the power circuit in the battery management unit of the vehicle. The signal generation circuit is used to output a first level signal when the target analog voltage signal is not detected, and to output a second level signal when the target analog voltage signal is detected. The power circuit is triggered to wake up when the first level signal is switched to the second level signal, so as to supply power to the controller in the battery management unit.

2. The wake-up circuit according to claim 1, characterized in that, The signal conversion circuit is a filter circuit.

3. The wake-up circuit according to claim 2, characterized in that, The filtering circuit includes a first resistor and a filtering capacitor. The first end of the first resistor is the input terminal of the signal conversion circuit, the second end of the first resistor is connected to the first end of the filtering capacitor, the second end of the first resistor is the output terminal of the signal conversion circuit, and the second end of the filtering capacitor is grounded.

4. The wake-up circuit according to claim 1, characterized in that, The signal generation circuit includes a comparator, the first input terminal of the comparator is the input terminal of the signal generation circuit, the second input terminal of the comparator is used to receive a reference voltage signal, and the output terminal of the comparator is the output terminal of the signal generation circuit. The comparator is used to generate the first level signal when the input signal at the first input terminal is less than the input signal at the second input terminal, and to generate the second level signal when the input signal at the first input terminal is greater than the input signal at the second input terminal.

5. The wake-up circuit according to claim 1, characterized in that, The power supply circuit includes a power chip, and the output terminal of the signal generation circuit is used to connect to the wake-up pin of the power chip. The power chip is triggered to wake up and supply power to the controller when the first level signal is switched to the second level signal. Alternatively, the power supply circuit includes a controller area network (CLAN) chip and a power supply chip. The output terminal of the signal generation circuit is connected to the wake-up pin of the CLAN chip. The voltage output terminal of the CLAN chip is connected to the wake-up pin of the power supply chip. The CLAN chip is triggered to wake up when the first level signal is switched to the second level signal, and wakes up the power supply chip to supply power to the controller.

6. The wake-up circuit according to claim 1, characterized in that, The wake-up circuit also includes an operational amplifier follower circuit. The output terminal of the signal detection circuit is connected to the input terminal of the operational amplifier follower circuit. The output terminal of the operational amplifier follower circuit is connected to the input terminal of the signal conversion circuit. The output terminal of the operational amplifier follower circuit is also used to connect to the sampling input terminal of the controller.

7. A battery management unit, characterized in that, The battery management unit includes: Power supply circuit; A controller, wherein the power supply terminal of the controller is connected to the output terminal of the power supply circuit; The wake-up circuit according to any one of claims 1 to 6, wherein the wake-up circuit is configured to generate a wake-up signal upon receiving a control guidance function signal in the form of a pulse width modulation signal, so as to wake up the power supply circuit to supply power to the controller.

8. The battery management unit according to claim 7, characterized in that, The battery management unit also includes a pre-charge resistor circuit, a pre-charge switch, and a drive circuit. The first terminal of the pre-charge resistor circuit is connected to the positive voltage terminal of the battery pack, the second terminal of the pre-charge resistor circuit is connected to the first terminal of the pre-charge switch, the second terminal of the pre-charge switch is connected to the pre-charge capacitor in the battery distribution unit of the vehicle, the control terminal of the pre-charge switch is connected to the output terminal of the drive circuit, and the input terminal of the drive circuit is connected to the control signal output terminal of the controller.

9. The battery management unit according to claim 8, characterized in that, The pre-charge resistor circuit includes at least one surface-mount power resistor; And / or, the precharge switch is a MOSFET; And / or, the battery management unit further includes a first connector connected to a first terminal of the precharge resistor circuit and a second connector connected to a second terminal of the precharge switch. The first connector and the second connector are respectively used for plug-in connection with a third connector and a fourth connector in the battery power distribution unit. The third connector is connected to the positive voltage terminal of the battery pack, and the fourth connector is connected to the precharge capacitor. And / or, the battery management unit further includes a circuit board on which the circuit elements contained in the battery management unit are integrated.

10. A battery power distribution unit, characterized in that, The battery power distribution unit includes: shell; The battery management unit according to any one of claims 7 to 9, wherein the battery management unit is fixed inside the housing.

11. A battery pack, characterized in that, The battery pack includes the battery power distribution unit as described in claim 10.

12. A vehicle, characterized in that, The vehicle includes a vehicle body and a battery pack as described in claim 11, wherein the battery pack is used to power the vehicle body.

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