Multi-loop pre-charging device and vehicle

Abstract

The utility model relates to the technical field of electric vehicles, in particular to a multi-loop pre-charging device and a vehicle. Comprising a plurality of high-voltage pre-charging assemblies which are connected in parallel; the switch assemblies are respectively connected with the plurality of high-voltage pre-charging assemblies in a one-to-one correspondence manner, each switch assembly comprises a plurality of pre-charging contactors and a plurality of anode contactors, the switch assemblies have a plurality of switch states, and each switch state corresponds to the pre-charging instruction; and the control assembly is connected with the switch assembly, and the control assembly controls the plurality of pre-charging contactors and the positive pole contactors to be in corresponding switch states based on the pre-charging instruction so as to supply power to the plurality of high-voltage pre-charging assemblies. Therefore, by adopting a multi-loop parallel high-voltage pre-charging technology, the problem that the existing high-voltage pre-charging loop is single-path and cannot control the power-on of the electric appliance in a targeted manner according to actual requirements is solved, so that the power-on flexibility and reliability of the vehicle high-voltage system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a multi-circuit pre-charging device and a vehicle. Background Art

[0002] In recent years, with the growing demand for electric vehicle power and range, the motor power used in electric vehicles has become increasingly powerful, and the voltage and stored energy of power batteries have also increased. Combined with the inherent characteristics of electric vehicles, when the vehicle is powered on, the high voltage on the power battery will instantly load the positive and negative poles of the vehicle's high-voltage electrical appliances. The resulting high current can burn out the appliances. The use of a high-voltage pre-charge circuit can avoid the high current generated when the contactor closes, reduce the impact of high current on electrical components such as the contactor, and increase the safety of high-voltage system power-up.

[0003] In related technology, a high-voltage power distribution cabinet for explosion-proof electric vehicles consists of a power distribution circuit and a flameproof cabinet. The power distribution circuit is composed of a charging circuit, a pre-charging circuit, and a power supply circuit. The pre-charging circuit is composed of a pre-charging low-voltage relay, a pre-charging contactor, and a buffer resistor. The pre-charging circuit is connected to the main motor high-voltage controller, the oil pump controller, and a supercapacitor.

[0004] However, although a pre-charging circuit is added to this solution, the pre-charging circuit is single-channel and cannot specifically control the power-on of electrical appliances according to actual needs, which urgently needs to be solved. Utility Model Content

[0005] The utility model provides a multi-circuit pre-charging device and a vehicle to solve the problem that the existing high-voltage pre-charging circuit is a single circuit and cannot specifically control the power-on of electrical appliances according to actual needs, thereby improving the flexibility and reliability of the power-on of the vehicle's high-voltage system.

[0006] To achieve the above-mentioned purpose, the first embodiment of the present invention provides a multi-circuit pre-charging device, comprising: a plurality of high-voltage pre-charging components, a switch component and a control component, wherein:

[0007] Multiple high-voltage pre-charge components are connected in parallel;

[0008] The switch assembly is connected to the multiple high-voltage pre-charging assemblies in a one-to-one correspondence, the switch assembly includes multiple pre-charging contactors and multiple positive contactors, and the switch assembly has multiple switching states, each switching state corresponds to a pre-charging instruction;

[0009] A control component is connected to the switch component, and the control component controls the multiple pre-charging contactors and the multiple positive contactors to be in corresponding switching states based on the pre-charging instruction to power the multiple high-voltage pre-charging components respectively.

[0010] According to one embodiment of the present invention, the plurality of high-voltage pre-filling assemblies include first to N-th high-voltage pre-filling assemblies, and the first to N-th high-voltage pre-filling assemblies are all connected to the switch assembly.

[0011] According to one embodiment of the present invention, the switch assembly includes:

[0012] A negative electrode contactor, one end of which is connected to the negative electrode of the power battery, and the other end of which is connected to the negative electrodes of the first to Nth high-voltage pre-charging assemblies;

[0013] The plurality of pre-charging contactors include first to Nth pre-charging switches and first to Nth pre-charging resistors;

[0014] The first to Nth positive contactors, the first to Nth pre-charge switches and the first to Nth pre-charge resistors, one end of the first to Nth positive contactors are respectively connected to the positive electrodes of the first to Nth high-voltage pre-charge components, the other ends of the first to Nth positive contactors are respectively connected to the positive electrodes of the power batteries, one end of the first to Nth pre-charge switches are respectively connected to one end of the first to Nth positive contactors and the positive electrodes of the first to Nth high-voltage pre-charge components, the other ends of the first to Nth pre-charge switches are respectively connected to one end of the first to Nth pre-charge resistors, and the other ends of the first to Nth pre-charge resistors are respectively connected to the other ends of the first to Nth positive contactors and the positive electrodes of the power batteries.

[0015] According to one embodiment of the present invention, the control component includes:

[0016] A vehicle controller for receiving the high-voltage connection instruction;

[0017] a battery management system connected to the vehicle controller and configured to close the negative contactor based on the high-voltage connection instruction;

[0018] A relay control system is connected to the vehicle controller and the battery management system respectively, and is used to control the corresponding circuit to perform pre-charging based on the high-voltage connection instruction when the negative contactor is in a closed state.

[0019] According to one embodiment of the present invention, the control component further includes:

[0020] A detection component is connected to the switch assembly and is used to detect whether the switch assembly is in a fault state.

[0021] According to one embodiment of the present invention, it further includes:

[0022] An alarm component is connected to the detection component and is used for performing an acoustic alarm and / or a visual alarm when the switch component is in the fault state.

[0023] According to one embodiment of the present invention, the alarm component includes:

[0024] an acoustic alarm component connected to the detection component and configured to generate an acoustic alarm when the switch assembly is in the fault state;

[0025] And / or, an optical alarm component, which is connected to the detection component and is used to perform an optical alarm when the switch component is in the fault state.

[0026] According to one embodiment of the present invention, it further includes:

[0027] A display component is connected to the detection component and is used to display the fault state when the switch component is in the fault state.

[0028] According to one embodiment of the present invention, it further includes:

[0029] A communication component is connected to the detection component and is used to send the fault status to a preset mobile terminal when the switch component is in the fault state.

[0030] According to the multi-circuit pre-charging device proposed in the embodiment of the utility model, a control component connected to the switch component controls multiple pre-charging contactors and multiple positive contactors to be in corresponding switching states based on pre-charging instructions, thereby respectively powering multiple high-voltage pre-charging components connected in parallel. Therefore, by adopting multi-circuit parallel high-voltage pre-charging technology, the problem of the existing high-voltage pre-charging circuit being a single circuit and unable to control the power supply of electrical appliances according to actual needs is solved, thereby improving the flexibility and reliability of the vehicle high-voltage system power supply.

[0031] To achieve the above-mentioned object, a second embodiment of the present invention provides a vehicle comprising the above-mentioned multi-circuit pre-charging device.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] Figure 1 This is a connection diagram of a multi-circuit pre-filling device according to an embodiment of the present utility model;

[0035] Figure 2 This is a basic working flow diagram of multi-circuit precharging according to an embodiment of the present invention;

[0036] Figure 3 The figure is a schematic diagram of a multi-loop pre-charging control network topology according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] The following describes a multi-circuit pre-charging device and a vehicle according to an embodiment of the present invention with reference to the accompanying drawings. First, the multi-circuit pre-charging device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0039] Figure 1 It is a connection diagram of a multi-circuit pre-filling device according to an embodiment of the present invention.

[0040] For example, Figure 1 As shown, the multi-circuit pre-filling device 10 includes: multiple high-voltage pre-filling components 100, a switch component 200 and a control component 300.

[0041] Among them, multiple high-voltage pre-charging components 100 are connected in parallel; the switch components 200 are connected to the multiple high-voltage pre-charging components 100 one by one, and the switch components 200 include multiple pre-charging contactors and multiple positive contactors. The switch component 200 has multiple switching states, and each switching state corresponds to the pre-charging instruction; the control component 300 is connected to the switch component 200, and the control component 300 controls the multiple pre-charging contactors and multiple positive contactors to be in the corresponding switching states based on the pre-charging instruction, so as to supply power to the multiple high-voltage pre-charging components 100 respectively.

[0042] The pre-charge instruction includes a high-voltage connection instruction and a high-voltage disconnection instruction.

[0043] That is to say, the switch component 200, as a multi-way switch device, can be connected one-to-one with multiple groups of high-voltage pre-charge components 100, and the multiple high-voltage pre-charge components 100 are connected in parallel, and the switch component 200 can include multiple pre-charge contactors and multiple positive contactors. The switch component 200 can have multiple switching states, and each state corresponds to a specific pre-charge instruction; the control component 300 is responsible for receiving and processing the pre-charge instruction. According to the received pre-charge instruction, the control component 300 can send a corresponding control signal to the switch component 200 to make the multiple pre-charge contactors and the multiple positive contactors enter a specific switching state. When the multiple pre-charge contactors and the multiple positive contactors are in a specific switching state, the required power supply can be provided for the corresponding high-voltage pre-charge components in the multiple high-voltage pre-charge components 100, thereby separately controlling the power supply of each high-voltage pre-charge component in the multiple high-voltage pre-charge components 100.

[0044] Optionally, the plurality of high-voltage pre-filling assemblies 100 include first to N-th high-voltage pre-filling assemblies, and the first to N-th high-voltage pre-filling assemblies are all connected to the switch assembly 200 .

[0045] Specifically, if Figure 1 As shown, the plurality of high-pressure pre-filling components 100 can be divided into a first high-pressure pre-filling component 101, a second high-pressure pre-filling component 102, a third high-pressure pre-filling component 103, a fourth high-pressure pre-filling component 104 and a fifth high-pressure pre-filling component 105. The first to fifth high-pressure pre-filling components 101 to 105 are respectively located in five high-pressure pre-filling circuits (i.e., Figure 2 The main drive high-voltage circuit 1, the main drive high-voltage circuit 2, the auxiliary drive high-voltage circuit, the thermal management high-voltage circuit and the upper installation high-voltage circuit are shown), and the first to fifth high-voltage pre-charge components 101~105 are all connected to the switch component 200.

[0046] It should be noted that, for the DC charging process, there is no need to pre-charge the main drive high-voltage circuit 1 and the main drive high-voltage circuit 2.

[0047] Optionally, the switch assembly 200 includes: a negative contactor 201, multiple pre-charging contactors, and first to Nth positive contactors, wherein the multiple pre-charging contactors include first to Nth pre-charging switches and first to Nth pre-charging resistors. One end of the negative contactor 201 is connected to the negative electrode of the power battery, and the other end of the negative contactor 201 is connected to the negative electrode of the first to Nth high-voltage pre-charging assemblies; one end of the first to Nth positive contactors is respectively connected to the positive electrode of the first to Nth high-voltage pre-charging assemblies, and the other end of the first to Nth positive contactors is respectively connected to the positive electrode of the power battery; one end of the first to Nth pre-charging switches is respectively connected to one end of the first to Nth positive contactors and the positive electrode of the first to Nth high-voltage pre-charging assemblies, and the other end of the first to Nth pre-charging switches is respectively connected to one end of the first to Nth pre-charging resistors, and the other end of the first to Nth pre-charging resistors is respectively connected to the other end of the first to Nth positive contactors and the positive electrode of the power battery.

[0048] Specifically, if Figure 1 As shown, the high-voltage negative end is matched with a negative contactor 201, and the high-voltage positive end can be divided into five pre-charging circuits, each of which includes a positive contactor, a pre-charging switch and a pre-charging resistor. For example, the main drive circuit 1 includes a first positive contactor 202, a first pre-charging switch 207 and a first pre-charging resistor 212, the main drive high-voltage circuit 2 includes a second positive contactor 203, a second pre-charging switch 208 and a second pre-charging resistor 213, the auxiliary drive high-voltage circuit includes a third positive contactor 204, a third pre-charging switch 209 and a third pre-charging resistor 214, the thermal management high-voltage circuit includes a fourth positive contactor 205, a fourth pre-charging switch 210 and a fourth pre-charging resistor 215, and the upper-mounted high-voltage circuit includes a fifth positive contactor 206, a fifth pre-charging switch 211 and a fifth pre-charging resistor 216.

[0049] Further, if Figure 1As shown, one end of the first positive contactor 202 is respectively connected to the positive electrode of the first high-voltage pre-charge component 101, and the other end of the first positive contactor 202 is connected to the positive electrode of the power battery. One end of the first pre-charge switch 207 is respectively connected to one end of the first positive contactor 202 and the positive electrode of the first high-voltage pre-charge component 101, and the other end of the first pre-charge switch 207 is connected to one end of the first pre-charge resistor 212, and the other end of the first pre-charge resistor 212 is respectively connected to the other end of the first positive contactor 202 and the positive electrode of the power battery; one end of the second positive contactor 203 is connected to the positive electrode of the second high-voltage pre-charge component 102, and the second positive contactor 207 is connected to the positive electrode of the power battery. 03 is connected to the positive electrode of the power battery, one end of the second pre-charging switch 208 is respectively connected to one end of the second positive contactor 203 and the positive electrode of the second high-voltage pre-charging component 102, the other end of the second pre-charging switch 208 is connected to one end of the second pre-charging resistor 213, the other end of the second pre-charging resistor 213 is respectively connected to the other end of the second positive contactor 203 and the positive electrode of the power battery; one end of the third positive contactor 204 is connected to the positive electrode of the third high-voltage pre-charging component 103, the other end of the third positive contactor 204 is connected to the positive electrode of the power battery, one end of the third pre-charging switch 209 is respectively connected to one end of the third positive contactor 204 The first end of the third pre-charge switch 209 is connected to the positive electrode of the third high-voltage pre-charge component 103, the other end of the third pre-charge resistor 214 is connected to the other end of the third pre-charge resistor 214, and the other end of the third pre-charge resistor 214 is respectively connected to the other end of the third positive contactor 204 and the positive electrode of the power battery; one end of the fourth positive contactor 205 is connected to the positive electrode of the fourth high-voltage pre-charge component 104, the other end of the fourth positive contactor 205 is connected to the positive electrode of the power battery, one end of the fourth pre-charge switch 210 is respectively connected to one end of the fourth positive contactor 205 and the positive electrode of the fourth high-voltage pre-charge component 104, and the other end of the fourth pre-charge resistor 214 is respectively connected to the other end of the third positive contactor 204 and the positive electrode of the power battery. The fourth pre-charging resistor 215 is connected to one end, the other end of the fourth positive contactor 205 is respectively connected to the other end of the power battery; one end of the fifth positive contactor 206 is connected to the positive electrode of the fifth high-voltage pre-charging component 105, and the other end of the fifth positive contactor 206 is connected to the positive electrode of the power battery, one end of the fifth pre-charging switch 211 is respectively connected to one end of the fifth positive contactor 206 and the positive electrode of the fifth high-voltage pre-charging component 105, the other end of the fifth pre-charging switch 211 is connected to one end of the fifth pre-charging resistor 216, and the other end of the fifth pre-charging resistor 216 is respectively connected to the other end of the fifth positive contactor 206 and the positive electrode of the power battery.

[0050] Optionally, the control component 300 includes a vehicle controller 301, a battery management system 302, and a relay control system 303. The vehicle controller 301 is configured to receive a high-voltage connection instruction; the battery management system 302 is connected to the vehicle controller 301 and configured to close the negative contactor 201 based on the high-voltage connection instruction; and the relay control system 303 is connected to the vehicle controller 301 and the battery management system 302, respectively, and configured to control the corresponding circuit to perform pre-charging based on the high-voltage connection instruction when the negative contactor 201 is in the closed state.

[0051] Specifically, in the entire high-voltage system circuit of the embodiment of the present invention, Figure 3 As shown, the control component 300 includes a vehicle control unit 301 (VCU), a battery management system 302 (BMS) and an instrument control system 303 (ICS). The vehicle control unit 301 can be responsible for the vehicle's power-on and power-off processes and the issuance of contactor closing or opening instructions. First, the vehicle control unit 301 can activate the battery management system 302 and the relay control system 303, and each controller enters a self-test state to ensure normal communication and accurately report their respective states. After the vehicle controller 301 receives the high-voltage connection instruction, the battery management system 302 closes the negative contactor 201 (equipped at the high-voltage negative end, detected and controlled by the battery management system 302) according to the high-voltage connection instruction, and reports the status of the negative contactor 201. It can be understood that during the high-voltage power-on process, closing the negative contactor 201 first can avoid the generation of short-circuit current before the positive contactor is closed, thereby protecting the electrical equipment in the high-voltage system from damage; when the relay control system 303 receives the negative contactor 201 status sent by the battery management system 302 as a closed state, it can start controlling the corresponding circuit for pre-charging based on the high-voltage connection instruction.

[0052] It should be noted that if the status of the negative contactor 201 reported by the battery management system 302 is a fault state (such as a circuit breaker fault, a adhesion fault, etc.), the relay control system 303 does not process it and still performs corresponding actions according to the high-voltage connection instruction issued by the vehicle controller 301.

[0053] Furthermore, each high-voltage pre-charge circuit includes a set of pre-charge contactors and positive contactors, which are respectively detected and controlled by the relay control system 303. When controlling the corresponding circuit for pre-charging, the relay control system 303 first closes the pre-charge contactors of the corresponding circuit. While the pre-charge contactors are closed, the relay control system 303 can report the pre-charging status of each circuit as "pre-charging in progress". When the pre-charge voltage of the corresponding circuit reaches 98% of the total voltage, the positive contactors of the corresponding circuit are closed, and after a delay of 20ms, the pre-charge contactors are disconnected. After the contactor action is completed, after a delay of 20ms, the relay control system 303 reports "pre-charging completed". Finally, closing the positive contactor can connect the positive line in the high-voltage system, indicating that the power supply is complete, thus providing the necessary conditions for subsequent vehicle starting and other operations.

[0054] It should be noted that if a single pre-charge is unsuccessful, the relay control system 303 can perform multiple pre-charges, wherein the single pre-charge time and the multiple pre-charge time intervals can be determined by the relay control system 303 according to the pre-charge resistance characteristics, and the total duration of the multiple pre-charges shall not exceed the preset duration (the preset duration can be determined according to the actual requirements of the high-voltage system and is not specifically limited here). The conditions for determining pre-charge failure can be customized by the relay control system 303, for example, within a certain period of time, the detection pre-charge voltage does not reach 50% of the total voltage.

[0055] During pre-charging, if the vehicle controller 301 receives a fault report from a high-voltage electrical appliance, it can send a high-voltage disconnect command to the corresponding circuit with the fault, causing the relay control system 303 to disconnect the positive contactor. This allows for flexible control of the on / off state of each high-voltage circuit based on the high-voltage system fault and different scenarios, reducing the probability of abnormal high-voltage power failure in the vehicle and improving the safety of the high-voltage system.

[0056] Furthermore, after pre-charging is successful, if the relay control system 303 detects that the first to fifth positive contactors 202-206 or the negative contactor 201 are abnormally disconnected (such as contactor failure, electrical failure, etc.), the pre-charging status at this time is reported as "not pre-charged". Under normal circumstances, after pre-charging is successful, the battery management system 302 disconnects the negative contactor 201 and reports the status of the negative contactor 201; the relay control system 303 receives the high-voltage disconnection command sent by the vehicle controller 301, executes the action of disconnecting the positive contactor of the corresponding circuit, and needs to control the positive contactor to disconnect and report the positive contactor status within 2.2s. If the relay control system 303 does not receive the high-voltage disconnection command, when the relay control system 303 has no activation signal, it controls the positive contactor of the corresponding circuit to disconnect.

[0057] In addition, the relay control system 303 needs to execute the action of disconnecting the pre-charging contactor again when disconnecting the positive contactor. Even if the pre-charging contactor is not closed at this time, the disconnection action is executed once to ensure circuit safety.

[0058] Optionally, the control component 300 further includes: a detection component 304, which is connected to the switch component 200 and is used to detect whether the switch component 200 is in a fault state.

[0059] Specifically, the detection component 304 for detecting whether the switch assembly 200 is in a fault state can be a sensor, such as a current / voltage sensor (used to monitor the current or voltage passing through the switch assembly 200 to determine whether it is working normally), a temperature sensor (detecting the temperature of the switch assembly or the surrounding environment to determine whether there are abnormal conditions such as overheating), a position sensor (used to detect the mechanical position or movement of the switch assembly, such as detecting whether the switch is correctly closed), etc. By setting certain numerical thresholds (such as current, voltage, temperature, etc.), when the detection value exceeds or falls below these thresholds, the switch assembly 200 is determined to be in a fault state.

[0060] Optionally, the multi-circuit pre-filling device 10 further includes: an alarm component 400, which is connected to the detection component 304 and is used to perform an acoustic alarm and / or a visual alarm when the switch component 200 is in a fault state.

[0061] That is, when the detection member 304 detects that the switch assembly 200 is in a fault state, an acoustic alarm or a visual alarm may be issued through the alarm assembly 400 to alert the operator.

[0062] Furthermore, the alarm assembly 400 includes an acoustic alarm assembly 401 and / or an optical alarm assembly 402. The acoustic alarm assembly 401 is connected to the detection assembly 304 and is used to generate an acoustic alarm when the switch assembly 200 is in a fault state; the optical alarm assembly 402 is connected to the detection assembly 304 and is used to generate an optical alarm when the switch assembly 200 is in a fault state.

[0063] Specifically, the alarm component 400 may include only the acoustic alarm component 401, or only the optical alarm component 402, or may include both the acoustic alarm component 401 and the optical alarm component 402. When it is detected that the switch component 200 is in a fault state, an alarm may be issued through sound (such as a buzzer), light (such as a light-emitting diode), etc.

[0064] Optionally, the multi-circuit pre-filling device 10 further includes: a display component 500, which is connected to the detection component 304 and is used to display a fault state when the switch component 200 is in a fault state.

[0065] Specifically, the display component 500 can indicate faults in various ways. For example, when the switch component 200 detects an abnormality or fault, the display component 500 can display the specific fault type or location through text or symbols, such as displaying information such as "switch fault" or "power failure"; for more complex systems, the display component 500 can provide a graphical user interface to display the status, historical data, fault trend diagram, etc. of the switch component 200, so that the operator can take timely countermeasures.

[0066] Optionally, the multi-circuit pre-charging device 10 further includes: a communication component 600, which is connected to the detection component 304 and is used to send a fault status to a preset mobile terminal when the switch component 200 is in a fault state.

[0067] Specifically, the communication component 600 can encode the fault status information into a format suitable for transmission, such as text messages, emails, specific communication protocols, etc., and send the encoded fault status information to a preset mobile terminal (such as a mobile phone) through a wireless network (such as mobile data, Wi-Fi, Bluetooth, etc.) or a wired network (such as Ethernet). Through the real-time fault status notification function of the communication component 600, the reliability and response speed of the system can be greatly improved, and the risks of safety accidents caused by failures of the switch component 200 can be reduced.

[0068] According to the multi-circuit pre-charging device proposed in the embodiment of the utility model, a control component connected to the switch component controls multiple pre-charging contactors and multiple positive contactors to be in corresponding switching states based on pre-charging instructions, thereby respectively powering multiple high-voltage pre-charging components connected in parallel. Therefore, by adopting multi-circuit parallel high-voltage pre-charging technology, the problem of the existing high-voltage pre-charging circuit being a single circuit and unable to control the power supply of electrical appliances according to actual needs is solved, thereby improving the flexibility and reliability of the vehicle high-voltage system power supply.

[0069] An embodiment of the present invention further provides a vehicle, which includes the above-mentioned multi-circuit pre-charging device.

[0070] The vehicle proposed in the embodiment of the present invention solves the problem in the related art that the high-voltage circuit is directly connected to the power battery through the positive switch and the negative switch, and the instantaneous large current generated at the moment the vehicle high voltage is powered on will burn the electrical appliances through the multi-circuit pre-charging device. By providing a pre-charging contactor, the instantaneous large current generated at the moment the vehicle high voltage is powered on can be avoided from burning the electrical appliances, thereby improving the reliability of the vehicle high voltage system power-on.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0073] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A multi-circuit pre-filling device, characterized in that: include: Multiple high-voltage pre-charge components, switch components and control components, wherein, The multiple high-voltage pre-filling components are connected in parallel; The switch assembly is connected to the multiple high-voltage pre-charging assemblies in a one-to-one correspondence, the switch assembly includes multiple pre-charging contactors and multiple positive contactors, and the switch assembly has multiple switching states, each switching state corresponds to a pre-charging instruction; A control component is connected to the switch component, and the control component controls the multiple pre-charging contactors and the multiple positive contactors to be in corresponding switching states based on the pre-charging instruction to power the multiple high-voltage pre-charging components respectively.

2. The multi-circuit pre-filling device according to claim 1, characterized in that: The plurality of high-voltage pre-filling assemblies include first to N-th high-voltage pre-filling assemblies, and the first to N-th high-voltage pre-filling assemblies are all connected to the switch assembly.

3. The multi-circuit pre-filling device according to claim 2, characterized in that: The switch assembly comprises: A negative electrode contactor, one end of which is connected to the negative electrode of the power battery, and the other end of which is connected to the negative electrodes of the first to Nth high-voltage pre-charging assemblies; The plurality of pre-charging contactors include first to Nth pre-charging switches and first to Nth pre-charging resistors; The first to Nth positive contactors, the first to Nth pre-charge switches and the first to Nth pre-charge resistors, one end of the first to Nth positive contactors are respectively connected to the positive electrodes of the first to Nth high-voltage pre-charge components, the other ends of the first to Nth positive contactors are respectively connected to the positive electrodes of the power batteries, one end of the first to Nth pre-charge switches are respectively connected to one end of the first to Nth positive contactors and the positive electrodes of the first to Nth high-voltage pre-charge components, the other ends of the first to Nth pre-charge switches are respectively connected to one end of the first to Nth pre-charge resistors, and the other ends of the first to Nth pre-charge resistors are respectively connected to the other ends of the first to Nth positive contactors and the positive electrodes of the power batteries.

4. The multi-circuit pre-filling device according to claim 3, characterized in that: The control component includes: A vehicle controller for receiving the high-voltage connection instruction; a battery management system connected to the vehicle controller and configured to close the negative contactor based on the high-voltage connection instruction; A relay control system is connected to the vehicle controller and the battery management system respectively, and is used to control the corresponding circuit to perform pre-charging based on the high-voltage connection instruction when the negative contactor is in a closed state.

5. The multi-circuit pre-filling device according to claim 4, characterized in that: The control component further includes: A detection component is connected to the switch assembly and is used to detect whether the switch assembly is in a fault state.

6. The multi-circuit pre-filling device according to claim 5, characterized in that: Also includes: An alarm component is connected to the detection component and is used for performing an acoustic alarm and / or a visual alarm when the switch component is in the fault state.

7. The multi-circuit pre-filling device according to claim 6, characterized in that: The alarm component includes: an acoustic alarm component connected to the detection component and configured to generate an acoustic alarm when the switch assembly is in the fault state; And / or, an optical alarm component, which is connected to the detection component and is used to perform an optical alarm when the switch component is in the fault state.

8. The multi-circuit pre-filling device according to claim 5, characterized in that: Also includes: A display component is connected to the detection component and is used to display the fault state when the switch component is in the fault state.

9. The multi-circuit pre-filling device according to claim 5, characterized in that: Also includes: A communication component is connected to the detection component and is used to send the fault status to a preset mobile terminal when the switch component is in the fault state.

10. A vehicle, characterized in that: include: A multi-circuit pre-filling device as claimed in any one of claims 1 to 9.

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