CN212950146U - Charging circuit, device and electric automobile - Google Patents
Charging circuit, device and electric automobile Download PDFInfo
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- CN212950146U CN212950146U CN202021655508.2U CN202021655508U CN212950146U CN 212950146 U CN212950146 U CN 212950146U CN 202021655508 U CN202021655508 U CN 202021655508U CN 212950146 U CN212950146 U CN 212950146U
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The application discloses charging circuit, device and electric automobile, charging circuit includes power battery module, first switch module, direct current changes direct current converter and low-voltage battery module, power battery module's one end and first switch module one end are connected, direct current changes direct current converter's one end is connected to first switch module's the other end, the one end of low-voltage battery module is connected to direct current changes direct current converter's the other end, power battery module's the other end is connected to the other end of low-voltage battery module. The application is favorable for improving the intelligence and the convenience of the power supply of the low-voltage battery in the whole vehicle system.
Description
Technical Field
The application relates to the technical field of electric automobiles, in particular to a charging circuit, a charging device and an electric automobile.
Background
With the rapid development of the automobile industry, the number of urban vehicles, particularly household cars, is rapidly increased, exhaust gas generated by automobile fuel oil becomes one of main pollution sources of air pollution, and compared with the traditional automobile, the electric automobile can effectively reduce exhaust emission, thereby reducing environmental pollution, and has good development prospect.
At present, a low-voltage battery and a plurality of integrated circuits (such as a microprocessor, a digital signal processor, a dynamic random access memory, a static random access memory and the like) exist in a whole vehicle system of an electric vehicle, when the low-voltage battery is not fed, the low-voltage battery supplies power to the integrated circuits so as to maintain the normal operation of the whole vehicle system, and after the low-voltage battery is fed, the integrated circuits cannot normally work, so that the whole vehicle system cannot normally operate, and the electric vehicle cannot be normally used.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a charging circuit, a charging device and an electric automobile, so that convenience and intelligence of an electric automobile charging process are expected to be improved.
In a first aspect, the present application provides a charging circuit for a vehicle system, the charging circuit includes a power battery module, a first switch module, a dc-to-dc converter, and a low-voltage battery module,
one end of the power battery module is connected with one end of the first switch module, the other end of the first switch module is connected with one end of the direct current-to-direct current converter, the other end of the direct current-to-direct current converter is connected with one end of the low-voltage battery module, and the other end of the low-voltage battery module is connected with the other end of the power battery module.
In one embodiment, the charging circuit further includes a second switch module, the second switch module is connected in parallel with the first switch module, one end of the second switch module is connected to one end of the power battery module, and the other end of the second switch module is connected to one end of the dc-dc converter.
In one embodiment, the charging circuit further comprises a feed controller, wherein,
the feed controller is respectively connected with the power battery module and the first switch module;
and the feed controller receives a control instruction sent by the power battery module and determines the state of the first switch module according to the control instruction.
In one embodiment, the charging circuit further comprises a second switch module, wherein the second switch module is connected to the feeding controller.
In one embodiment, the charging circuit further comprises a second switch module, and the power battery module comprises a feed controller, wherein the second switch module is connected with the power battery module through the feed controller.
In one embodiment, the first switch module is a pre-charge switch.
In one embodiment, the second switch module is a pre-charge switch.
In one embodiment, a voltage monitoring device or circuit is disposed in the dc-to-dc converter.
In a second aspect, embodiments of the present application provide a charging device, which includes the charging circuit according to any one of the first aspect.
In a third aspect, the present application provides an electric vehicle comprising a charging circuit according to any one of the first aspect.
It can be seen that, in this application, charging circuit includes power battery module, first switch module, direct current to direct current converter and low voltage battery module, and wherein, power battery module's one end is connected with the one end of first switch module, and the one end of direct current to direct current converter is connected to the other end of first switch module, and the one end of low voltage battery module is connected to the other end of direct current to direct current converter, and the other end of low voltage battery module is connected power battery module's the other end. It can be seen that the charging circuit of this application can charge to low-voltage battery module through high-voltage battery module, realizes supplying power to low-voltage battery module, promotes the intelligence for low-voltage battery power supply in the whole car system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings referred to in the embodiments or the background art of the present application will be briefly described below.
Reference will now be made in brief to the accompanying drawings, to which embodiments of the present application relate.
Fig. 1 is a schematic structural diagram of a charging circuit according to this embodiment;
fig. 2 is a schematic structural diagram of another charging circuit provided in this embodiment;
fig. 3 is a schematic structural diagram of another charging circuit provided in this embodiment;
fig. 4 is a schematic structural diagram of another charging circuit provided in this embodiment.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions of the present application will be clearly and completely described below with reference to the drawings of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following are detailed below.
The terms "first" and "second" in the description and claims of the present application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a charging circuit, a charging device, or an electric vehicle that includes a series of components or modules is not limited to the listed components or modules, but may optionally include components or modules that are not listed, or may optionally include other components or modules that are inherent to the charging circuit, the charging device, or the electric vehicle.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a charging circuit provided in the present application, as shown in fig. 1, the charging circuit 10 includes a power battery module 101, a first switch module 102, a dc-dc converter 103, and a low-voltage battery module 104, wherein,
one end of the power battery module 101 is connected to one end of the first switch module 102, the other end of the first switch module 102 is connected to one end of the dc-dc converter 103, the other end of the dc-dc converter 103 is connected to one end of the low-voltage battery module 104, and the other end of the low-voltage battery module 104 is connected to the other end of the power battery module 101.
The power Battery module 101 is a module integrating a power Battery and a power Battery Management module, and can implement power supply and power supply Management, where the power Battery Management module may be a Battery Management System (BMS), and the power Battery Management module may also be a vehicle control unit.
A direct current to direct current converter (DC-to-DC converter), also called a DC/DC converter, is an electric energy conversion circuit or an electromechanical device, and can convert a Direct Current (DC) power source into a direct current (or approximately direct current) power source with different voltages. The whole vehicle system of the electric vehicle can convert the high-voltage current provided by the power battery module into specific low-voltage current through the direct current-to-direct current converter and store the specific low-voltage current in the low-voltage battery module so as to supply power to each integrated circuit in the whole vehicle system.
In addition, the dc-dc converter 103 according to the present application can start the current conversion function if it is determined that the low-voltage battery module 104 needs to be charged after receiving the high-voltage current from the power battery module 101, convert the high-voltage current into the low-voltage current corresponding to the low-voltage battery module 104, and provide the low-voltage current to the low-voltage battery module 104. Wherein the determination by the dc-to-dc converter 103 that the low-voltage battery module 104 needs to be charged includes any one of the following two cases: 1. receiving a charging instruction from the power battery module 101; 2. the output voltage of itself (corresponding to the voltage of the low-voltage battery module 104) is sampled, and it is determined that the output voltage is less than a preset voltage.
The low-voltage battery module 104 may be directly connected to a plurality of integrated circuits (e.g., a microprocessor, a digital signal processor, a dynamic random access memory, and a static random access memory), and provide a specific dc voltage required by the integrated circuits to the integrated circuits, wherein the dc voltage provided by the low-voltage battery module 104 may be 12V, and the magnitude of the dc voltage provided by the low-voltage battery module 104 is not particularly limited.
Specifically, referring to fig. 1, when the low-voltage battery module 104 is not powered, the charging circuit 10 can charge the low-voltage battery module 104 through the power battery module 101 in the following two ways.
In a first implementation manner, the power battery module 101 monitors the voltage of the low-voltage battery module 104, and when it is detected that the voltage is less than or equal to a first preset voltage, closes the first switch module 102, inputs a high-voltage current to the dc-dc converter 103, generates a charging instruction, and sends the charging instruction to the dc-dc converter 103; after receiving the charging instruction, the dc-to-dc converter 103 converts the high-voltage current output by the power battery module 101 into a low-voltage current corresponding to the low-voltage battery module 104 according to the charging instruction, and provides the low-voltage current to the low-voltage battery module 104. It should be noted that, in this way, when the voltage is less than or equal to a first preset voltage, that is, when the external electric quantity of the low-voltage battery module 104 is less than or equal to a preset electric quantity, the charging circuit 10 can control the first switch module 102 to be closed through the power battery module 101, so as to input a high-voltage current to the dc-dc converter 103, and control the dc-dc converter 103 through the power battery module 101 to start a current conversion function to charge the low-voltage battery module 104.
In a second implementation manner, the power battery module 101 monitors the voltage of the low-voltage battery module 104, and when the voltage is detected to be less than or equal to a second preset voltage, closes the first switch module 102, so as to input a high-voltage current to the dc-dc converter 103; when receiving the high-voltage current of the power battery module 101, the dc-dc converter 103 performs the following operations: sampling the output voltage of the converter; judging whether the output voltage is smaller than a third preset voltage, wherein the third preset voltage is smaller than the second preset voltage; if yes, converting the high-voltage current output by the power battery module 101 into a low-voltage current corresponding to the low-voltage battery module 104, and providing the low-voltage electricity for the low-voltage battery module 104. It should be noted that the third preset voltage in the second manner may be equal to the first preset voltage corresponding to the first manner, that is, when the voltage is less than or equal to the third preset voltage, that is, when the electric quantity of the low-voltage battery module 104 is lower than or equal to the preset electric quantity, the charging circuit 10 may control the first switch module 102 to be closed through the power battery module 101, so as to input a high-voltage current to the dc-dc converter 103, and monitor the input voltage of the low-voltage battery module 104 through the dc-dc converter 103 to control the self-starting current conversion function, so as to charge the low-voltage battery module 104.
In this implementation manner, a voltage monitoring device or circuit may be disposed in the dc-dc converter 103 to implement a function capable of sampling the output voltage thereof.
Therefore, the charging circuit 10 provided by the application can charge the low-voltage battery module 104 through the power battery module 101 (high-voltage battery module) in time before the low-voltage battery module 104 feeds power, and the intelligence of supplying power to the low-voltage battery in the whole vehicle system is improved.
Further, the first switch module 102 may be a pre-charge switch, and if the first switch module 102 is a pre-charge switch, the inrush current generated when the first switch module 102 is activated can be reduced, so that the charging circuit 10 is protected.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another charging circuit provided in the present application, and as shown in fig. 2, the charging circuit 20 includes: the power battery module 201, the first switch module 202, the dc-to-dc converter 203, the low-voltage battery module 204 and the second switch module 205, wherein one end of the power battery module 201 is connected with one end of the first switch module 202, the other end of the first switch module 202 is connected with one end of the dc-to-dc converter 203, the other end of the dc-to-dc converter 203 is connected with one end of the low-voltage battery module 204, the other end of the low-voltage battery module 204 is connected with the other end of the power battery module 201, the second switch module 205 is connected with the first switch module 202 in parallel, one end of the second switch module 205 is connected with one end of the power battery module 201, and the other end of the second switch module 205 is connected with one end of the dc-to-dc converter 203.
In the charging circuit 20 shown in fig. 2, a second switch module (corresponding to the second switch module 205 in fig. 2) connected in parallel with the first switch module 102 is added to the charging circuit 10 shown in fig. 1, the second switch module is a manual switch, the second switch module may be a physical switch, and the second switch module may also be a virtual control.
The charging circuit 20 shown in fig. 2 can implement all functions of the charging circuit 10 shown in fig. 1, and in addition, the dc-dc converter 203 can obtain high-voltage current from the power battery module 201 and convert the high-voltage current into low-voltage current required by itself to implement power supply to itself under the condition that the low-voltage battery module 204 is fed.
When the low-voltage battery module 204 does not supply power, the working principle and the working process of the charging circuit 20 shown in fig. 2 are the same as those of the charging circuit 10 shown in fig. 1, please refer to the description of the charging circuit 10 shown in fig. 1, and thus, the description thereof is omitted.
When the low-voltage battery module 204 feeds power, the battery management function of the power battery module 201 cannot be automatically started, and at this time, a user may manually close the second switch module 205, so as to ensure that the power battery module 201 inputs high-voltage current to the dc-dc converter 203, and the dc-dc converter 203 converts the high-voltage current into low-voltage current required by itself to supply power to itself, so as to sample its output voltage, and therefore, the low-voltage battery module 204 feeds power, and it is known that the output voltage at this time is less than the third preset voltage, so that the dc-dc converter 203 starts its current conversion function to charge the low-voltage battery module 104.
In practical applications, in the case that the electric vehicle needs to be used but the low-voltage battery module 204 is fed, the user may manually close the second switch module 205 to supply power to the low-voltage battery module 204 through the power battery module 201. It can be seen that, the charging circuit 20 provided in the present application can not only realize the functions in the charging circuit 10, but also charge the low-voltage battery module 204 in time through the power battery module 201 and the dc-to-dc converter 203 according to the closing operation of the second switch module 205 when the low-voltage battery module 204 feeds power, thereby expanding the charging mechanism of the electric vehicle, solving the problem of feeding the low-voltage battery module 204, and ensuring the normal operation of the electric vehicle.
In practical applications, in the event that the electric vehicle is temporarily stopped, the user may disconnect the second switch module 205, and even if the low-voltage battery module 204 is fed, the charging circuit 20 will not charge the low-voltage battery module 204 through the power battery module 201. It can be seen that the charging circuit 20 provided by the present application can avoid unnecessary consumption of the power in the power battery module 201 in the case where the low-voltage battery module 204 feeds power but the electric vehicle is not used temporarily by opening the second switch module 205.
Further, the second switch module 205 may be a pre-charge switch, and if the second switch module 205 is a pre-charge switch, the inrush current generated when the second switch module 205 is activated can be reduced, so as to protect the charging circuit 20.
Referring to fig. 3, fig. 3 is a schematic structural diagram of another charging circuit provided in the present application, and as shown in fig. 3, the charging circuit 30 includes: power battery module 301, first switch module 302, direct current change direct current converter 303, low voltage battery module 304 and feed controller 305, wherein, power battery module 301's one end with the one end of first switch module 302 is connected, first switch module 302's the other end is connected direct current changes direct current converter 303's one end, direct current changes direct current converter 303's the other end and connects low voltage battery module 304's one end, low voltage battery module 304's the other end is connected power battery module 301's the other end, feed controller 305 connects respectively power battery module 301 with first switch module 302.
In the charging circuit 30 shown in fig. 3, a feeding controller (corresponding to the feeding controller 305 in fig. 3) is added to the charging circuit 10 shown in fig. 1.
Unlike the charging circuit 10 shown in fig. 1, when the low-voltage battery module 304 is not fed, the charging circuit 30 shown in fig. 3 closes the first switch module 302 by: the power battery module 301 generates a control command and sends the control command to the feed controller 305; the feeding controller 305 closes the first switch module 302 according to a control instruction.
It can be seen that, in the present embodiment, in the case that the low-voltage battery module 304 is about to feed power, the charging circuit 30 can control the feeding controller 305 to close the first switch module 302 through the power battery module 301, so as to charge the low-voltage battery module 304 through the power battery module 301 in time.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another charging circuit provided in the present application, and as shown in fig. 4, the charging circuit 40 includes: the power battery module comprises a power battery module 401, a first switch module 402, a dc-to-dc converter 403, a low-voltage battery module 404, a feed controller 405 and a second switch module 406, wherein one end of the power battery module 401 is connected with one end of the first switch module 402, the other end of the first switch module 402 is connected with one end of the dc-to-dc converter 403, the other end of the dc-to-dc converter 403 is connected with one end of the low-voltage battery module 404, the other end of the low-voltage battery module 404 is connected with the other end of the power battery module 401, and the feed controller 405 is respectively connected with the power battery module 401, the first switch module 402 and the second switch module 406.
In the charging circuit 40 shown in fig. 4, a second switch module (corresponding to the second switch module 406 in fig. 4) connected to the feeding controller 305 is added to the charging circuit 30 shown in fig. 3.
The charging circuit 40 shown in fig. 4 can implement all functions of the charging circuit 30 shown in fig. 3, and in addition, the dc-dc converter 403 and the feeding controller 405 can obtain high-voltage current from the power battery module 401 and convert the high-voltage current into low-voltage current to implement self power supply under the condition of feeding the low-voltage battery module 404.
When the low-voltage battery module 404 does not supply power, the working principle and the working process of the charging circuit 40 shown in fig. 4 are the same as those of the charging circuit 30 shown in fig. 3, please refer to the description of the charging circuit 30 shown in fig. 3, and the description thereof is omitted here.
When the low-voltage battery module 404 feeds power and the second switch module 406 is closed, the feed controller 405 may obtain a high-voltage current from the power battery module 401, convert the high-voltage current into a low-voltage current required by itself, and supply power to itself, so as to close the first switch module 402, thereby implementing that a high-voltage current is input to the dc-dc converter 403 through the power battery module 401; after receiving the high-voltage current, the dc-to-dc converter 403 converts the high-voltage current into a low-voltage current required by itself to supply power to itself, so as to start a current conversion function of itself, convert the high-voltage current into a low-voltage current corresponding to the low-voltage battery module 404, and provide the low-voltage current to the low-voltage battery module 404, thereby implementing charging to the low-voltage battery module 404 through the power battery module 401.
In practical applications, when the low-voltage battery module 404 feeds power, a user can manually close the second switch module 406 to charge the low-voltage battery module 404 through the power battery module 401.
Alternatively, the feeding controller 405 may be integrated in the power battery module 401, and the feeding controller 405 is further connected to the second switch module 406, which is equivalent to that, when the low-voltage battery module 404 feeds power, the power battery module 401 integrated with the feeding controller 405 receives an external switch (the second switch module 406) signal to control the first switch module 402 to be closed, so as to charge the low-voltage battery module 404.
In this embodiment, it can be seen that, in the charging circuit 40, when the low-voltage battery module 404 feeds power, the external switch (i.e. the second switch module 406) controls the power feed controller 405, so as to charge the low-voltage battery module 404 through the power battery module 401.
In addition, the present application provides a charging device (not shown) including the charging circuit shown in any one of fig. 1 to 4.
In addition, the present application provides an electric vehicle (not shown) including the charging circuit shown in any one of fig. 1 to 4.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed charging circuit may be implemented in other manners. For example, the above-described charging circuit embodiments are merely illustrative, and for example, the division of the above-described modules is only one logical functional division, and in actual implementation, there may be another division, for example, a plurality of modules or components may be combined or integrated into another module, or some features may be omitted.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The present application has been described in detail, and the principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific implementation and application scope, and in view of the above, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A charging circuit is applied to a whole vehicle system and is characterized by comprising a power battery module, a first switch module, a direct current-to-direct current converter and a low-voltage battery module,
one end of the power battery module is connected with one end of the first switch module, the other end of the first switch module is connected with one end of the direct current-to-direct current converter, the other end of the direct current-to-direct current converter is connected with one end of the low-voltage battery module, and the other end of the low-voltage battery module is connected with the other end of the power battery module.
2. The charging circuit of claim 1, further comprising a second switch module connected in parallel with the first switch module, wherein one end of the second switch module is connected to one end of the power battery module, and the other end of the second switch module is connected to one end of the dc-dc converter.
3. The charging circuit of claim 1, further comprising a feed controller, wherein,
the feed controller is respectively connected with the power battery module and the first switch module;
and the feed controller receives a control instruction sent by the power battery module and determines the state of the first switch module according to the control instruction.
4. The charging circuit of claim 3, further comprising a second switching module, wherein the second switching module is coupled to the feed controller.
5. The charging circuit of claim 1, further comprising a second switch module, wherein the power battery module comprises a feed controller, and wherein the second switch module is connected to the power battery module through the feed controller.
6. The charging circuit according to any one of claims 1-5, wherein the first switching module is a pre-charge switch.
7. The charging circuit of any one of claims 2, 4 and 5, wherein the second switching module is a pre-charge switch.
8. A charging circuit according to any of claims 1-5, characterized in that a voltage monitoring device or circuit is provided in the DC-DC converter.
9. A charging device, characterized in that it comprises a charging circuit according to any one of claims 1-8.
10. An electric vehicle, characterized in that it comprises a charging circuit according to any one of claims 1 to 8.
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| CN202021655508.2U CN212950146U (en) | 2020-08-10 | 2020-08-10 | Charging circuit, device and electric automobile |
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| CN202021655508.2U CN212950146U (en) | 2020-08-10 | 2020-08-10 | Charging circuit, device and electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113165523A (en) * | 2020-08-10 | 2021-07-23 | 深圳欣锐科技股份有限公司 | Charging circuit, device and electric automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113165523A (en) * | 2020-08-10 | 2021-07-23 | 深圳欣锐科技股份有限公司 | Charging circuit, device and electric automobile |
| CN113165523B (en) * | 2020-08-10 | 2022-12-23 | 深圳欣锐科技股份有限公司 | Charging circuit, device and electric automobile |
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