Double-direct-current converter control device and vehicle

Abstract

The utility model provides a double-direct-current-converter control device and a vehicle, and relates to the technical field of vehicles, and the double-direct-current-converter control device comprises a rechargeable energy storage system; the high-voltage controller comprises a first direct-current converter module and a second direct-current converter module, the input end of the first direct-current converter module is connected with the rechargeable energy storage system, and the input end of the second direct-current converter module is connected with the rechargeable energy storage system; the cooling fan is connected with the output end of the first direct current converter module; and the storage battery assembly is connected with the output end of the second direct-current converter module. According to the technical scheme, the two direct-current converter modules work independently, and the complexity of low-voltage system design and the complexity of direct-current converter control strategies can be reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a dual DC converter control device and a vehicle. Background Art

[0002] At present, the internal part of the all-in-one controller of commercial vehicles mainly uses a DCDC (direct current converter) module to power the battery and the low-voltage components of the vehicle. As the functions of the vehicle increase and the low-voltage electrical appliances increase, the power of a single DCDC module cannot meet the power supply requirements of the low-voltage components of the vehicle. A higher-power DCDC module is needed. A higher-power DCDC module needs to be redeveloped, which is costly and has a long development cycle. The existing two DCDC modules power the low-voltage system through two DCDCs in parallel, which are highly coupled and complex to control. Conventional DCDC modules on the market cannot be used in direct parallel. The DCDC module needs to be redesigned, which is costly. Utility Model Content

[0003] The embodiments according to the present application are intended to improve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, an object according to an embodiment of the present application is to provide a dual DC converter control device.

[0005] Another object according to an embodiment of the present application is to provide a vehicle.

[0006] In order to achieve the above-mentioned purpose, according to the technical solution of the first aspect of the present application, a dual DC converter control device is provided, including: a rechargeable energy storage system; a high-voltage controller, including a first DC converter module and a second DC converter module, the input end of the first DC converter module is connected to the rechargeable energy storage system, and the input end of the second DC converter module is connected to the rechargeable energy storage system; a cooling fan, the cooling fan is connected to the output end of the first DC converter module; and a battery assembly is connected to the output end of the second DC converter module.

[0007] According to the dual DC converter control device provided in the present application, a rechargeable energy storage system, a high-voltage controller, a cooling fan and a battery assembly are included. The first DC converter module and the second DC converter module are integrated in the high-voltage controller, and the power of the first DC converter module and the second DC converter module can be configured as needed. The first DC converter module supplies power to the cooling fan, and the second DC converter module supplies power to the battery and other low-voltage loads except the cooling fan. Under normal working conditions, the first DC converter module and the second DC converter module both operate in a constant voltage output mode. The outputs of the first DC converter module and the second DC converter module are not connected in parallel, and they work independently of each other. They can be awakened at the same time or at different times. Compared with the output parallel mode, the complexity of the low-voltage system design and the complexity of the DC converter control strategy can be reduced. There is no coupling relationship between the outputs of the first DC converter module and the second DC converter module, and conventional DC converters on the market can be used for design without redevelopment.

[0008] In addition, the technical solution provided by this application may also have the following additional technical features:

[0009] In some technical solutions, optionally, the dual DC converter control device also includes: a first relay, one end of which is connected to the negative electrode of the rechargeable energy storage system, and the other end of which is respectively connected to the first DC converter module and the second DC converter module.

[0010] In this technical solution, the dual DC converter control device also includes a first relay, one end of which is connected to the negative electrode of the rechargeable energy storage system, and the other end is connected to the first DC converter module and the second DC converter module respectively. Specifically, the first relay is a negative electrode relay that can control the on and off of the power supply.

[0011] In some technical solutions, optionally, the dual DC converter control device also includes: a second relay, one end of which is connected to the positive electrode of the rechargeable energy storage system, and the other end of which is respectively connected to the first DC converter module and the second DC converter module.

[0012] In this technical solution, the dual DC converter control device also includes a second relay, one end of which is connected to the positive electrode of the rechargeable energy storage system, and the other end of which is respectively connected to the first DC converter module and the second DC converter module, so that the first DC converter module and the second DC converter module can be connected to the high voltage of the rechargeable energy storage system.

[0013] In some technical schemes, optionally, the dual DC converter control device also includes: a pre-charging relay, one end of which is connected to the positive pole of the rechargeable energy storage system, and the other end is respectively connected to the first DC converter module and the second DC converter module; a pre-charging resistor, one end of which is connected to the pre-charging relay, and the other end is respectively connected to the first DC converter module and the second DC converter module.

[0014] In this technical solution, the dual DC converter control device also includes a pre-charging relay and a pre-charging resistor. One end of the pre-charging relay is connected to the positive electrode of the rechargeable energy storage system, and the other end is connected to the first DC converter module and the second DC converter module respectively. The pre-charging resistor is arranged between the pre-charging relay and the first DC converter module and the second DC converter module. Through the pre-charging relay and the pre-charging resistor, the low-voltage part in the circuit can be energized first, the voltage can be stabilized through the pre-charging resistor, and then the high-voltage part can be turned on to achieve a smooth transition between high voltage and low voltage.

[0015] In some technical solutions, optionally, the dual DC converter control device also includes: a first fuse, arranged between the pre-charging resistor and the first DC converter module; and / or, a second fuse, arranged between the pre-charging resistor and the second DC converter module.

[0016] In this technical solution, the dual DC converter control device also includes a first fuse and a second fuse. The first fuse is arranged between the pre-charging resistor and the first DC converter module, and the second fuse is arranged between the pre-charging resistor and the second DC converter module for short circuit and overcurrent protection.

[0017] In some technical solutions, optionally, the dual DC converter control device also includes: a control system, connected to the high-voltage controller, used to receive fault information from the high-voltage controller and control the on and off of the first relay, the second relay, and the pre-charge relay according to the fault information.

[0018] In this technical solution, the dual DC converter control device also includes a control system, which is connected to the high-voltage controller and is used to receive fault information from the high-voltage controller and control the on and off of the first relay, the second relay, and the pre-charge relay according to the fault information.

[0019] In some technical schemes, optionally, the control system is also used to obtain the difference between the rear end voltage of the pre-charging resistor and the front end voltage of the pre-charging relay, and when the fault information is no fault, close the first relay and the pre-charging relay, and after a first preset time and when the difference is within a preset range, close the second relay, and disconnect the pre-charging relay after a second preset time, and report a high voltage power-on failure after the first preset time and when the difference is not within the preset range.

[0020] In this technical solution, the control system is also used to obtain the difference between the rear end voltage of the pre-charging resistor and the front end voltage of the pre-charging relay, and when the fault information is no fault, close the first relay and the pre-charging relay, and after a first preset time and when the difference is within a preset range, close the second relay, and disconnect the pre-charging relay after a delay of a second preset time, and after the first preset time and when the difference is not within the preset range, report that the DC converter high voltage power-on failed.

[0021] In some technical solutions, optionally, the battery assembly includes a battery and a plurality of loads, and the battery and the plurality of loads are respectively connected to the output end of the second DC converter module.

[0022] In this technical solution, the battery assembly includes a battery and a plurality of loads, and the battery and the plurality of loads are respectively connected to the output end of the second DC converter module.

[0023] According to the technical solution of the second aspect of the present application, a vehicle is provided, comprising: a dual DC converter control device as described in any technical solution of the first aspect of the present application.

[0024] The vehicle provided by the technical solution of the present application includes a dual DC converter control device as in any one of the technical solutions in the first aspect of the present application, and thus it has all the beneficial effects of the dual DC converter control device as in any one of the technical solutions in the first aspect of the present application, which will not be repeated here.

[0025] In some technical solutions, optionally, the vehicle includes an electric car.

[0026] In this technical solution, the vehicle includes an electric car.

[0027] Additional aspects and advantages of the embodiments according to the present application will become apparent in the following description or will be understood through the practice of the embodiments according to the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the working principle of a dual DC converter control device according to an embodiment provided by the present application;

[0029] Figure 2 is a schematic diagram of the working principle of a dual DC converter control device according to another embodiment provided by the present application;

[0030] Figure 3 is a schematic block diagram of the structure of a dual DC converter control device according to an embodiment provided by the present application;

[0031] Figure 4 It is a schematic block diagram of the structure of a vehicle according to an embodiment provided by the present application.

[0032] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0033] 10: dual DC converter control device; 110: rechargeable energy storage system; 120: high voltage controller; 122: first DC converter module; 124: second DC converter module; 130: cooling fan; 140: battery assembly; 142: battery; 144: load; 150: first relay; 160: second relay; 170: pre-charge relay; 180: pre-charge resistor; 190: first fuse; 210: second fuse; 220: control system; 30: vehicle. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present application, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the features of the embodiments of the present application can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present application. However, the embodiments of the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection provided by the embodiments of the present application is not limited to the specific embodiments disclosed below.

[0036] Refer to the following Figures 1 to 4 Some embodiments provided according to the present application are described.

[0037] like Figure 1 , Figure 2 As shown, a dual DC converter control device 10 proposed according to an embodiment of the present application includes a rechargeable energy storage system 110, a high voltage controller 120, a cooling fan 130 and a battery assembly 140. Specifically, the high voltage controller 120 includes a first DC converter module 122 and a second DC converter module 124, the input end of the first DC converter module 122 is connected to the rechargeable energy storage system 110, and the input end of the second DC converter module 124 is connected to the rechargeable energy storage system 110. The cooling fan 130 is connected to the output end of the first DC converter module 122. The battery assembly 140 is connected to the output end of the second DC converter module 124.

[0038] According to the dual DC converter control device 10 provided in this embodiment, a rechargeable energy storage system 110, a high-voltage controller 120, a cooling fan 130 and a battery assembly 140 are included. A first DC converter module 122 and a second DC converter module 124 are integrated in the high-voltage controller 120, and the power of the first DC converter module 122 and the second DC converter module 124 can be configured as needed. The first DC converter module 122 supplies power to the cooling fan 130, and the second DC converter module 124 supplies power to the battery 142 and other low-voltage loads 144 except the cooling fan 130. Under normal working conditions, the first DC converter module 122 and the second DC converter module 124 both operate in a constant voltage output mode. The outputs of the first DC converter module 122 and the second DC converter module 124 are not connected in parallel, and they work independently of each other. They can be awakened at the same time or at different times. Compared with the output parallel mode, the complexity of the low-voltage system design and the complexity of the DC converter control strategy can be reduced. There is no coupling relationship between the outputs of the first DC converter module 122 and the second DC converter module 124 , and conventional DC converters on the market can be used for design without the need for redevelopment.

[0039] In some embodiments, optionally, the dual DC converter control device 10 further includes a first relay 150, one end of the first relay 150 is connected to the negative pole of the rechargeable energy storage system 110, and the other end is respectively connected to the first DC converter module 122 and the second DC converter module 124. Specifically, the first relay 150 is a negative pole relay that can control the on and off of the power supply.

[0040] In some embodiments, optionally, the dual DC converter control device 10 also includes a second relay 160, one end of the second relay 160 is connected to the positive pole of the rechargeable energy storage system 110, and the other end is respectively connected to the first DC converter module 122 and the second DC converter module 124, so that the first DC converter module 122 and the second DC converter module 124 can be connected to the high voltage of the rechargeable energy storage system 110.

[0041] In some embodiments, optionally, the dual DC converter control device 10 further includes a pre-charging relay 170 and a pre-charging resistor 180. One end of the pre-charging relay 170 is connected to the positive electrode of the rechargeable energy storage system 110, and the other end is connected to the first DC converter module 122 and the second DC converter module 124 respectively. The pre-charging resistor 180 is arranged between the pre-charging relay 170 and the first DC converter module 122 and the second DC converter module 124. Through the pre-charging relay 170 and the pre-charging resistor 180, the low-voltage part in the circuit can be energized first, the voltage can be stabilized through the pre-charging resistor 180, and then the high-voltage part can be turned on to achieve a smooth transition between high voltage and low voltage.

[0042] In some embodiments, optionally, the dual DC converter control device 10 further includes a first fuse 190 and a second fuse 210. The first fuse 190 is disposed between the pre-charging resistor 180 and the first DC converter module 122, and the second fuse 210 is disposed between the pre-charging resistor 180 and the second DC converter module 124, for short circuit and overcurrent protection.

[0043] like Figure 3 As shown, in some embodiments, optionally, the dual DC converter control device 10 also includes a control system 220, which is connected to the high-voltage controller 120, for receiving fault information of the high-voltage controller 120, and controlling the on and off of the first relay 150, the second relay 160, and the pre-charge relay 170 according to the fault information.

[0044] In some embodiments, optionally, the control system 220 is also used to obtain the difference between the rear end voltage of the pre-charging resistor 180 and the front end voltage of the pre-charging relay 170, and when the fault information is no fault, close the first relay 150 and close the pre-charging relay 170, after a first preset time and when the difference is within a preset range, close the second relay 160, and disconnect the pre-charging relay 170 after a second preset time, and after the first preset time and when the difference is not within the preset range, report that the DC converter high voltage power-on failed.

[0045] In some embodiments, optionally, the battery assembly 140 includes a battery 142 and a plurality of loads 144 , and the battery 142 and the plurality of loads 144 are respectively connected to the output end of the second DC converter module 124 .

[0046] like Figure 4 As shown, a vehicle 30 proposed according to an embodiment of the present application includes a dual DC converter control device 10 as described in any of the above embodiments.

[0047] The vehicle 30 provided according to the embodiment of the present application includes the dual DC converter control device 10 as any of the above embodiments, and thus has all the beneficial effects of the dual DC converter control device 10 as any of the above embodiments, which will not be described in detail herein. The vehicle 30 includes an electric vehicle.

[0048] like Figure 1 and Figure 2As shown, according to a dual DC converter control device 10 of a specific embodiment proposed in the present application, two DC converter modules are integrated in the all-in-one controller, and the power of the two DC converters can be configured as needed. The first DC converter module 122 supplies power to the cooling fan 130, and the second DC converter module 124 supplies power to the battery 142 and other low-voltage loads 144 except the cooling fan 130. The outputs of the two DC converter modules are not connected in parallel and work independently of each other. There is no coupling relationship between the outputs of the two DC converter modules, and conventional DC converters on the market can be used for design.

[0049] Specifically, two DC converter modules are integrated in the all-in-one, the first DC converter module 122 supplies power to the cooling fan 130, and the second DC converter module 124 supplies power to the battery 142 and other loads 144 except the cooling fan 130. The two DC converter modules can be awakened at the same time or at different times.

[0050] The rechargeable energy storage system 110 (REESS) distributes power to the two DC converter modules through the first relay 150 inside the REESS and the second relay 160 and the pre-charge relay 170 inside the all-in-one high-voltage controller 120 .

[0051] During the high voltage power-on process, the control system 220 receives the fault information of the high voltage controller 120. In the absence of a fault, the negative relay is closed first, and then the pre-charge relay 170 is closed. After waiting for a certain period of time, it is determined whether the difference between the rear voltage of the pre-charge resistor 180 and the front voltage of the pre-charge relay 170 is within a preset range. If so, the second relay 160 is closed, and the pre-charge relay 170 is disconnected after a certain delay, and the DC converter module is powered on; otherwise, the all-in-one reports that the DC converter module high voltage power-on fails.

[0052] Under normal working conditions, the first DC converter module 122 and the second DC converter module 124 both operate in a constant voltage output mode.

[0053] In summary, the beneficial effects of the embodiments of the present application are:

[0054] 1. There is no coupling between the two DCDC (direct current converter) outputs. They are just installed together in the all-in-one high-voltage controller. Conventional DCDC on the market can be used for design, and the DCDC module does not need to be redeveloped.

[0055] 2. Dual DCDCs work independently. The first DCDC powers the cooling fan, and the second DCDC powers the battery and other loads except the cooling fan. They can be awakened at the same time or at different times. Compared with the output parallel mode, it can reduce the complexity of low-voltage system design and the complexity of DCDC control strategy.

[0056] 3. The dual DCDC grouping method is flexible and can be used in combination with conventional 2kW, 3kW, and 4.5kW.

[0057] In the embodiments according to the present application, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present application can be understood according to the specific circumstances.

[0058] In the description of the embodiments of the present application, it needs to be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the referred device or unit must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the embodiments of the present application.

[0059] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. 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 according to the present application. In this specification, the schematic representation of the above terms does 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.

[0060] The above are only preferred embodiments of the present application and are not intended to limit the embodiments of the present application. For those skilled in the art, various modifications and changes may be made to the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A dual DC converter control device, characterized in that: include: A rechargeable energy storage system (110); A high-voltage controller (120) comprises a first DC converter module (122) and a second DC converter module (124), wherein an input end of the first DC converter module (122) is connected to the rechargeable energy storage system (110), and an input end of the second DC converter module (124) is connected to the rechargeable energy storage system (110); A cooling fan (130), the cooling fan (130) being connected to an output end of the first DC converter module (122); The storage battery assembly (140) is connected to the output end of the second DC converter module (124).

2. The dual DC converter control device according to claim 1, characterized in that: Also includes: A first relay (150) has one end connected to the negative electrode of the rechargeable energy storage system (110), and the other end connected to the first DC converter module (122) and the second DC converter module (124).

3. The dual DC converter control device according to claim 2, characterized in that: Also includes: A second relay (160) has one end connected to the positive electrode of the rechargeable energy storage system (110), and the other end connected to the first DC converter module (122) and the second DC converter module (124).

4. The dual DC converter control device according to claim 3, characterized in that: Also includes: A pre-charging relay (170), one end of which is connected to the positive electrode of the rechargeable energy storage system (110), and the other end of which is respectively connected to the first DC converter module (122) and the second DC converter module (124); A pre-charging resistor (180) has one end connected to the pre-charging relay (170) and the other end connected to the first DC converter module (122) and the second DC converter module (124).

5. The dual DC converter control device according to claim 4, characterized in that: Also includes: A first fuse (190) is provided between the pre-charging resistor (180) and the first DC converter module (122); and / or, The second fuse (210) is provided between the pre-charging resistor (180) and the second DC converter module (124).

6. The dual DC converter control device according to claim 4, characterized in that: Also includes: A control system (220) is connected to the high-voltage controller (120) and is used to receive fault information of the high-voltage controller (120) and control the on and off of the first relay (150), the second relay (160), and the pre-charging relay (170) according to the fault information.

7. The dual DC converter control device according to claim 6, characterized in that: The control system (220) is also used to obtain the difference between the rear end voltage of the pre-charging resistor (180) and the front end voltage of the pre-charging relay (170), and when the fault information is no fault, close the first relay (150) and close the pre-charging relay (170), after a first preset time and when the difference is within a preset range, close the second relay (160), and disconnect the pre-charging relay (170) after a second preset time delay, and report a high voltage power-on failure when the first preset time and the difference is not within the preset range.

8. The dual DC converter control device according to any one of claims 1 to 7, characterized in that: The battery assembly (140) comprises a battery (142) and a plurality of loads (144); the battery (142) and the plurality of loads (144) are respectively connected to the output end of the second DC converter module (124).

9. A vehicle, characterized in that: include: A dual DC converter control device as claimed in any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle comprises an electric vehicle.

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