CN218783600U - Multi-branch high-voltage topological circuit and electric automobile - Google Patents
Multi-branch high-voltage topological circuit and electric automobile Download PDFInfo
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- CN218783600U CN218783600U CN202222996855.7U CN202222996855U CN218783600U CN 218783600 U CN218783600 U CN 218783600U CN 202222996855 U CN202222996855 U CN 202222996855U CN 218783600 U CN218783600 U CN 218783600U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Abstract
The utility model discloses a multi-branch high-voltage topology circuit and electric automobile. The double parallel branches, the corresponding charging and discharging terminals and the two control modules are arranged to collect the voltage of each double parallel branch, and the closing sequence of the first switch and the second switch is controlled when each double parallel branch is charged or discharged, so that the problem of circulation can be avoided when the line pressure difference is too large. In addition, when one of the double parallel branches breaks down, because the charging and discharging of the two double parallel branches are not interfered with each other, the normal charging and discharging can be carried out through the other double parallel branch, and therefore the safety of the whole system can be improved.
Description
Technical Field
The utility model relates to a battery charging technology field especially relates to a multi-branch high voltage topology circuit and electric automobile.
Background
At present, most battery system manufacturers repeatedly use a direct parallel connection mode for four-branch batteries. However, when the pressure difference of each parallel branch is too large, circulation problems are easily caused. And this kind of circuit design mode can only be connected with a charging pile usually and charge, and its charging current is little, and charging time is longer, and in practical application, relatively single lacks the flexibility. In addition, the safety is also low, for example, when one branch circuit fails, the automobile can be stopped, and accidents are easily caused in the driving process.
SUMMERY OF THE UTILITY MODEL
The utility model provides a multi-branch high-voltage topology circuit and electric automobile to realize avoiding the circulation problem when circuit pressure difference is too big, and can realize four guns to charge simultaneously at most, increase charging current, it is long when shortening to charge.
According to the utility model discloses an aspect provides a multi-branch circuit high-voltage topology circuit, and this multi-branch circuit high-voltage topology circuit includes: the device comprises a first switch, a second switch, at least two double parallel branches, a first charging and discharging terminal, a second charging and discharging terminal, a first control module and a second control module; wherein, two double parallel branches are respectively a first double parallel branch and a second double parallel branch;
the first electrode end of the first double parallel branch is electrically connected with the first end of the first switch, the first electrode end of the second double parallel branch is electrically connected with the first end of the second switch, and the second end of the first switch and the second end of the second switch are both electrically connected with the first charging and discharging terminal; the second end of the first switch is electrically connected with the second end of the second switch; the second electrode end of the first double parallel branch is electrically connected with the second electrode end of the second double parallel branch, and the second electrode end of the first double parallel branch is electrically connected with the second charging and discharging terminal;
the first control module is used for collecting the voltage of the first double parallel branch, and the second control module is used for collecting the voltage of the second double parallel branch and sending the voltage to the first control module;
the first control module is further configured to control the closing sequence of the first switch and the second switch when each dual parallel branch is powered on by discharging or charging.
Optionally, the first electrode terminal is a positive terminal, and the second electrode terminal is a negative terminal; or, the first electrode end is a negative electrode end, and the second electrode end is a positive electrode end.
Optionally, the first charging and discharging terminal includes a first charging port, a second charging port, a third charging port, a fourth charging port, a first discharging port, and a second discharging port;
the second charging and discharging terminal comprises a fifth charging port, a sixth charging port, a seventh charging port, an eighth charging port, a third discharging port and a fourth discharging port.
Optionally, a third switch is further included between the first electrode terminal of the second dual parallel branch and the first charging port, a fourth switch is further included between the first electrode terminal of the second dual parallel branch and the second charging port, a fifth switch is further included between the first electrode terminal of the first dual parallel branch and the third charging port, and a sixth switch is further included between the first electrode terminal of the first dual parallel branch and the fourth charging port.
Optionally, the first control module is further configured to:
when each double parallel branch is discharged and electrified, and the voltage difference of each double parallel branch is greater than the preset voltage difference, the switch corresponding to the double parallel branch with high closing voltage is controlled, and when the voltage difference discharged to each double parallel branch is less than or equal to the preset voltage difference, the switch corresponding to the double parallel branch with low closing voltage is controlled;
when each double parallel branch is charged and electrified, and the voltage difference of each double parallel branch is greater than the preset voltage difference, the switch corresponding to the double parallel branch with low closing voltage is controlled firstly, and when the voltage difference of each double parallel branch is less than or equal to the preset voltage difference after charging, the switch corresponding to the double parallel branch with high closing voltage is controlled.
Optionally, the first control module is further configured to: and when each double parallel branch circuit is charged or discharged and the voltage difference of each double parallel branch circuit is smaller than or equal to the preset voltage difference, controlling the first switch and the second switch to be closed.
Optionally, the multi-branch high-voltage topology circuit further includes: a heating system; and each double parallel branch is provided with one heating system.
Optionally, the first switch and the second switch are relay switches.
Optionally, the first dual parallel branch comprises a first branch and a second branch, and the second dual parallel branch comprises a third branch and a fourth branch; the first branch comprises a first battery pack, the second branch comprises a second battery pack, the third branch comprises a third battery pack, and the fourth branch comprises a fourth battery pack; the first control module is electrically connected with the communication port of each battery pack, the first switch, the second switch and the second control module;
the first control module and the second control module are further used for acquiring communication identification codes of communication ports of the battery packs respectively and controlling the communication ports of the battery packs to be in communication connection with the first to-be-connected charging pile or the second to-be-connected charging pile respectively.
According to another aspect of the present invention, there is provided an electric vehicle including the multi-branch high-voltage topology circuit according to the first aspect.
The technical scheme of the embodiment of the utility model, through providing a multi-branch high-voltage topology circuit and electric automobile, this multi-branch high-voltage topology circuit includes: the device comprises a first switch, a second switch, at least two double parallel branches, a first charging and discharging terminal, a second charging and discharging terminal, a first control module and a second control module; wherein, two double parallel branches are respectively a first double parallel branch and a second double parallel branch; the first electrode end of the first double parallel branch is electrically connected with the first end of the first switch, the first electrode end of the second double parallel branch is electrically connected with the first end of the second switch, and the second end of the first switch and the second end of the second switch are both electrically connected with the first charging and discharging terminal; the second end of the first switch is electrically connected with the second end of the second switch; the second electrode end of the first double parallel branch is electrically connected with the second electrode end of the second double parallel branch, and the second electrode end of the first double parallel branch is electrically connected with the second charge and discharge terminal; the first control module is used for acquiring the voltage of the first double parallel branch, and the second control module is used for acquiring the voltage of the second double parallel branch and sending the voltage to the first control module; the first control module is also used for controlling the closing sequence of the first switch and the second switch when each double parallel branch is charged or discharged. The circuit can realize that: the double parallel branches, the corresponding charging and discharging terminals and the two control modules are arranged to collect the voltage of each double parallel branch, and the closing sequence of the first switch and the second switch is controlled when each double parallel branch is charged or discharged, so that the problem of circulation can be avoided when the line pressure difference is too large. In addition, when one of the double parallel branches breaks down, because the charging and discharging of the two double parallel branches are not interfered with each other, the normal charging and discharging can be carried out through the other double parallel branch, so that the safety of the whole system can be improved, and the normal use of the functions can be ensured.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a multi-branch high-voltage topology circuit provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another multi-branch high-voltage topology circuit provided in an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a multi-branch high-voltage topology circuit provided in an embodiment of the present invention. Referring to fig. 1, the multi-branch high-voltage topology circuit includes: the circuit comprises a first switch K1, a second switch K2, at least two double parallel branches, a first charging and discharging terminal 10, a second charging and discharging terminal 20, a first control module 30 and a second control module 40; wherein, two double parallel branches are respectively a first double parallel branch L10 and a second double parallel branch L20; a first electrode end of the first double parallel branch L10 is electrically connected with a first end of the first switch K1, a first electrode end of the second double parallel branch L20 is electrically connected with a first end of the second switch K2, and a second end of the first switch K1 and a second end of the second switch K2 are both electrically connected with the first charge and discharge terminal 10; the second end of the first switch K1 is electrically connected with the second end of the second switch K2; a second electrode end of the first double-parallel branch L10 is electrically connected with a second electrode end of the second double-parallel branch L20, and a second electrode end of the first double-parallel branch L10 is electrically connected with the second charge and discharge terminal 20; the first control module 30 is configured to collect a voltage of the first double parallel branch L10, and the second control module 40 is configured to collect a voltage of the second double parallel branch L20 and send the voltage to the first control module 30; the first control module 30 is further configured to, when the voltage difference of each dual parallel branch does not satisfy the preset voltage difference condition, control the closing sequence of the first switch K1 and the second switch K2 so that the voltage difference of each dual parallel branch satisfies the preset voltage difference condition.
The first control module 30 is a main controller, and the second control module 40 is an auxiliary controller. The first control module 30 and the second control module 40 may be control chips such as a single chip, and may be specifically set according to actual conditions, which is not specifically limited herein.
The first double-parallel branch L10 is electrically connected to the first switch K1, the second double-parallel branch L20 is electrically connected to the second switch K2, and both the first switch K1 and the second switch K2 are electrically connected to the first charge/discharge terminal 10. The first switch K1 is used for controlling the first dual parallel branch L10 to be closed or opened with the first charge/discharge terminal 10 and the second charge/discharge terminal 20, and the second switch K2 is used for controlling the second dual parallel branch L20 to be closed or opened with the first charge/discharge terminal 10 and the second charge/discharge terminal 20.
The first control module 30 is configured to control the first switch K1 to be turned on or off, and collect a voltage of the first dual-parallel branch L10. The second control module 40 is configured to control the second switch K2 to be turned on or turned off, and collect the voltage of the second dual-parallel branch L20 and send the voltage to the first control module 30. The specific implementation manner of the second control module 40 controlling the second switch K2 to be turned on or off may be: the first control module 30 sends a corresponding closing or turning-off instruction to the second control module 40, and the second control module 40 controls the second switch K2 to be closed or turned off according to the received closing or turning-off instruction.
The first control module 30 calculates the voltage difference between the voltage of the first double parallel branch L10 and the voltage of the second double parallel branch L20 according to the voltages of the first double parallel branch L10 and the second double parallel branch L20, and when the voltage difference between the first double parallel branch and the second double parallel branch does not satisfy the preset voltage difference condition (wherein, the specific voltage difference comparison may be implemented by setting a comparator) in the discharging and charging processes of the double parallel branches, the first control module 30 controls the closing sequence of the first switch K1 and the second switch K2 to enable the voltage difference between the double parallel branches to satisfy the preset voltage difference condition, so that when the voltage difference of the line is too large, the problem of circulation current can be avoided, and thus, the impact current caused by the voltage difference can be prevented from damaging the switches, the battery cells and the like.
The first control module 30 controls the second switch K2 to be turned on or off, which means that: by sending a closing or opening instruction to the second control module 40, the second control module 40 controls the closing or opening of the second switch K2 according to the closing or opening instruction.
It should be noted that, when the topology circuit includes three or more than three double parallel branches, each double parallel branch is also provided with a corresponding switch, the first control module 30 may calculate the voltage difference between the double parallel branches according to the voltage of each double parallel branch, and when the voltage difference of each double parallel branch does not satisfy the preset voltage difference condition, the voltage difference of each double parallel branch may satisfy the preset voltage difference condition by controlling the sequence of closing the switches corresponding to each double parallel branch, so that when the voltage difference of the line is too large, the problem of circulating current may be avoided.
In addition, through setting up two at least two parallelly connected branch roads, when arbitrary two parallelly connected branch roads break down, because be mutually independent between each two parallelly connected branch roads, therefore can realize demands such as normal charge-discharge through normal two parallelly connected branch roads, still play redundant effect to a certain extent, therefore make entire system's security performance and practicality higher.
It should be noted that the multi-branch high-voltage topology circuit is only exemplarily described by including two dual parallel branches, and a plurality of dual parallel branches may also be provided, which may be specifically set according to actual situations, and is not specifically limited herein.
In the technical solution of this embodiment, a multi-branch high-voltage topology circuit is provided, where the multi-branch high-voltage topology circuit includes: the device comprises a first switch, a second switch, at least two double parallel branches, a first charging and discharging terminal, a second charging and discharging terminal, a first control module and a second control module; wherein, two double parallel branches are respectively a first double parallel branch and a second double parallel branch; the first electrode end of the first double parallel branch is electrically connected with the first end of the first switch, the first electrode end of the second double parallel branch is electrically connected with the first end of the second switch, and the second end of the first switch and the second end of the second switch are both electrically connected with the first charging and discharging terminal; the second end of the first switch is electrically connected with the second end of the second switch; the second electrode end of the first double parallel branch is electrically connected with the second electrode end of the second double parallel branch, and the second electrode end of the first double parallel branch is electrically connected with the second charge and discharge terminal; the first control module is used for acquiring the voltage of the first double parallel branch, and the second control module is used for acquiring the voltage of the second double parallel branch and sending the voltage to the first control module; the first control module is further used for controlling the closing sequence of the first switch and the second switch to enable the voltage difference of each double parallel branch to meet the preset voltage difference condition when the voltage difference of each double parallel branch does not meet the preset voltage difference condition when each double parallel branch is powered on in a discharging or charging mode. The circuit can realize that: the voltage of each double parallel branch is collected by arranging the double parallel branches, the corresponding charging and discharging terminals and the two control modules, and when the voltage difference of each double parallel branch does not meet the preset voltage difference condition during discharging or charging electrification of each double parallel branch, the voltage difference of each double parallel branch meets the preset voltage difference condition by controlling the closing sequence of the first switch and the second switch, so that the problem of circulation can be avoided when the line voltage difference is overlarge. In addition, when one of the double parallel branches breaks down, because the charging and discharging of the two double parallel branches are not interfered with each other, the normal charging and discharging can be carried out through the other double parallel branch, so that the safety of the whole system can be improved, and the normal use of the functions can be ensured.
On the basis of the foregoing technical solution, optionally, with reference to fig. 1 again, the first dual parallel branch L10 includes a first branch L11 and a second branch L12, and the second dual parallel branch L20 includes a third branch L21 and a fourth branch L22; the first branch L11 includes a first battery pack D1, the second branch L12 includes a second battery pack D2, the third branch L21 includes a third battery pack D3, and the fourth branch L22 includes a fourth battery pack D4; the first control module 30 is electrically connected with the communication port of each battery pack, the first switch K1, the second switch K2 and the second control module 40; the first control module 30 and the second control module 40 are further respectively used for acquiring communication identification codes of communication ports of the battery packs and respectively controlling the communication ports of the battery packs to be in communication connection with the first to-be-connected charging pile or the second to-be-connected charging pile.
The first branch L11 and the second branch L12 are connected in parallel to form a first double parallel branch L10 and then electrically connected with the first switch K1, and the third branch L21 and the fourth branch L22 are connected in parallel to form a second double parallel branch L20 and then electrically connected with the second switch K2.
The first charging and discharging terminal comprises a plurality of charging ports and a plurality of discharging ports, and correspondingly, the second charging and discharging terminal also comprises a plurality of charging ports and a plurality of discharging ports. When charging is needed, the first switch K1 and the second switch K2 are closed, and when any one charging port in the first charging and discharging terminals is connected with one charging gun of the charging pile (correspondingly, the charging port corresponding to the charging port in the second charging and discharging terminals is also connected with the charging gun corresponding to the charging pile), the charging gun can charge the battery pack of each double parallel branch at the same time. Similarly, when discharging is needed, any one discharging port in the first charging and discharging terminal is connected with the load terminal, so that the battery packs can be discharged to the load at the same time.
The first control module 30 and the second control module 40 are configured to collect communication identification codes (where the communication identification codes may be ID numbers, two-dimensional codes, and the like) of communication terminals of the battery packs of the respective dual parallel branches respectively. When a charging area or a charging center can provide two charging piles to be connected (for example, a first charging pile to be connected and a second charging pile to be connected) at the same time for charging, the first control module 30 is used for acquiring the communication identification code of each battery pack communication end and controlling the communication identification code of the first charging pile to be connected (or the second charging pile to be connected) to be connected with the communication identification code of each battery pack communication end, and the second control module 40 is used for acquiring the communication identification code of each battery pack communication end and controlling the communication identification code of the second charging pile to be connected (or the first charging pile to be connected) to be connected with the communication identification code of each battery pack communication end. Wherein, every stake of waiting to link to each other to fill can provide two guns that charge usually, consequently, can provide two when filling electric pile (can provide four guns that charge) when charging center can provide two simultaneously, through closed first switch K1 and second switch K2, and be connected (corresponding) with four charging ports of first charge and discharge terminal respectively with four guns that charge (correspondingly, four charging ports of second charge and discharge terminal also correspond and are connected with four guns that charge), every rifle that charges all can charge each group battery simultaneously, therefore four guns are charged can be realized simultaneously to every group battery, therefore can increase charging current, shorten the length of time of charging. Wherein, can provide two simultaneously at charging center and fill when electric pile, the user can select to adopt a rifle to four guns to charge for every group battery according to actual need is nimble, therefore can improve practicality, variety and flexibility.
Optionally, the first electrode terminal is a positive terminal, and the second electrode terminal is a negative terminal; or the first electrode end is a negative electrode end, and the second electrode end is a positive electrode end.
The first electrode end of the first double parallel branch and the first electrode end of the second double parallel branch may be both the positive electrode end and the negative electrode end. For example, when the first electrode terminal of the first dual parallel branch and the first electrode terminal of the second dual parallel branch are positive electrode terminals, the second electrode terminal of the first dual parallel branch and the second electrode terminal of the second dual parallel branch are negative electrode terminals. Similarly, when the first electrode end of the first dual parallel branch and the first electrode end of the second dual parallel branch are negative electrode ends, the second electrode end of the first dual parallel branch and the second electrode end of the second dual parallel branch are positive electrode ends. Whether the first electrode terminal is a positive terminal or a negative terminal may be set according to actual conditions, and is not particularly limited herein.
Optionally, with continued reference to fig. 1, the first charge and discharge terminal 10 includes a first charge port M1, a second charge port M2, a third charge port M3, a fourth charge port M4, a first discharge port N1, and a second discharge port N2; the second charge and discharge terminal 20 includes a fifth charge port M5, a sixth charge port M6, a seventh charge port M7, an eighth charge port M8, a third discharge port N3, and a fourth discharge port N4.
The first charging and discharging terminal 10 is specifically connected with the positive terminal or the negative terminal of the charging pile or the load, and is related to the positive and negative electrodes of the first electrode terminal of each double parallel branch. For example, when the first electrode end of the first dual parallel branch and the first electrode end of the second dual parallel branch are positive electrode ends, the first charge/discharge terminal 10 is correspondingly connected to the positive electrode end of the charging pile or the load, and the second charge/discharge terminal 20 is correspondingly connected to the positive electrode end of the charging pile or the load.
For example, taking the first electrode terminal of the first dual parallel branch and the first electrode terminal of the second dual parallel branch as positive terminals for illustration, assuming that the charging center can provide two charging piles simultaneously (i.e. four charging guns can be provided), it is possible to achieve that at most four charging guns simultaneously charge each battery pack. Specifically, the first switch K1 and the second switch K2 are controlled to be closed, and the four charging ports of the first charging and discharging terminal 10 are respectively connected with the positive terminals of the four charging guns, that is, the first charging port M1, the second charging port M2, the third charging port M3, and the fourth charging port M4 are respectively connected with the positive terminals of the four charging guns, and correspondingly, the four charging ports of the second charging and discharging terminal 20 are respectively connected with the negative terminals of the corresponding four charging guns, that is, the fifth charging port M5, the sixth charging port M6, the seventh charging port M7, and the eighth charging port M8 are respectively connected with the negative terminals of the corresponding four charging guns, so that each charging gun can simultaneously charge each battery pack, and therefore, each battery pack can simultaneously realize four-gun charging, thereby increasing the charging current and shortening the charging time.
Optionally, the first control module is further configured to: when each double parallel branch is discharged and electrified, if the voltage difference of each double parallel branch is greater than the preset voltage difference, the switch corresponding to the double parallel branch with high closing voltage is controlled, and when the voltage difference of each double parallel branch is discharged to be less than or equal to the preset voltage difference, the switch corresponding to the double parallel branch with low closing voltage is controlled; when each double parallel branch is charged and electrified, if the voltage difference of each double parallel branch is greater than the preset voltage difference, the switch corresponding to the double parallel branch with low closing voltage is controlled, and when the voltage difference of each double parallel branch is less than or equal to the preset voltage difference after charging, the switch corresponding to the double parallel branch with high closing voltage is controlled.
The specific value of the preset pressure difference may be set according to actual conditions, and is not specifically limited herein.
For example, taking the topology circuit including two dual parallel branches as an example, when each dual parallel branch is discharged and powered on, if the voltage difference between the first dual parallel branch and the second dual parallel branch is greater than the preset voltage difference, which indicates that the voltage difference of the circuit is greater and the problem of circulating current is easily caused, the switch corresponding to the dual parallel branch with a high closing voltage is controlled first (if the voltage of the first dual parallel branch is higher than the voltage of the second dual parallel branch, the first switch of the first dual parallel branch is closed first), and when the voltage difference of each dual parallel branch is discharged to be less than or equal to the preset voltage difference, the switch corresponding to the dual parallel branch with a low closing voltage is controlled second (if the voltage difference of each dual parallel branch is less than or equal to the preset voltage difference, the second switch of the second dual parallel branch is closed again). When each double parallel branch is charged and powered on, if the voltage difference between the first double parallel branch and the second double parallel branch is greater than the preset voltage difference, which indicates that the voltage difference of the line is large and circulation is likely to occur, the switch corresponding to the double parallel branch with low voltage is controlled to be closed (if the voltage of the first double parallel branch is higher than that of the second double parallel branch, the first switch of the first double parallel branch is closed first), and when the voltage difference of each double parallel branch to be charged is less than or equal to the preset voltage difference, the switch corresponding to the double parallel branch with high voltage is controlled to be closed.
Optionally, the first control module is further configured to: when each double parallel branch circuit is charged or discharged, and the voltage difference of each double parallel branch circuit meets the preset voltage difference condition, the first switch and the second switch are controlled to be closed.
Specifically, when each double parallel branch circuit is charged or discharged, and when the voltage difference of each double parallel branch circuit meets the preset voltage difference condition, the voltage difference of the circuit is not large, and the problem of circulation current cannot be caused, so that the first switch and the second switch are directly closed to perform normal discharging or charging.
Fig. 2 is a schematic structural diagram of another multi-branch high-voltage topology circuit provided in the embodiment of the present invention. As a specific implementation manner, optionally, referring to fig. 2, a third switch K3 is further included between the first electrode terminal of the second dual-parallel branch L20 and the first charging port M1, a fourth switch K4 is further included between the first electrode terminal of the second dual-parallel branch L20 and the second charging port M2, a fifth switch K5 is further included between the first electrode terminal of the first dual-parallel branch L10 and the third charging port M3, and a sixth switch K6 is further included between the first electrode terminal of the first dual-parallel branch L10 and the fourth charging port M4.
The third switch K3 is used for controlling the on/off of the first charging port M1, the fourth switch K4 is used for controlling the on/off of the second charging port M2, the fifth switch K5 is used for controlling the on/off of the third charging port M3, and the sixth switch K6 is used for controlling the on/off of the fourth charging port M4.
The third switch K3, the fourth switch K4, the fifth switch K5, and the sixth switch K6 may be relay switches.
Optionally, the multi-branch high-voltage topology circuit further includes: a heating system; each double parallel branch is provided with a heating system.
Referring to fig. 2, a first branch L11 and a second branch L12 form a first dual parallel branch L10, wherein the first branch L11 includes a first battery pack including a battery box No. 1D 11 and a battery box No. 2D 12, the second branch L12 includes a second battery pack including a battery box No. 3D 21 and a battery box No. 4D 22. The third branch L21 and the fourth branch L22 form a second double parallel branch L20, wherein the third branch L21 includes a third battery pack including a No. 5 battery box D31 and a No. 6 battery box D32, the fourth branch L22 includes a fourth battery pack including a No. 7 battery box D41 and a No. 8 battery box D42. Wherein, a first heating system 50 is arranged between the first battery pack and the second battery pack, and a second heating system 60 is arranged between the third battery pack and the fourth battery pack.
Wherein, each heating system is provided with a heating relay switch. For example, the first heating system 50 is provided with a seventh switch K7, and the second heating system 60 is provided with an eighth switch K8. Each double parallel branch is mutually independent, and each heating system is also mutually independent, so when one double parallel branch breaks down, the corresponding heating system can be accurately disconnected, the device is protected, and the safety of the whole system is improved.
Optionally, the first switch and the second switch are relay switches.
Illustratively, referring to fig. 2, the first control module is a BMS board 1, and the second control module is a BMS board 2. And setting the first to-be-connected charging pile as a first direct current charging pile, and setting the second to-be-connected charging pile as a second direct current charging pile. The multi-branch high-voltage topological circuit realizes the principle that at most four guns can charge each battery pack simultaneously as follows: when the charging center can provide two charging piles simultaneously (i.e. four charging guns can be provided), for example, a first dc charging pile and a second dc charging pile are controlled to close a first switch K1 and a second switch K2, and four charging ports of a first charging terminal 10 are respectively connected with positive terminals of two charging guns of the first dc charging pile and positive terminals of two charging guns of the second dc charging pile, for example, a first charging port M1 is connected with a positive terminal of a first charging gun of the first dc charging pile, a second charging port M2 is connected with a positive terminal of a second charging gun of the first dc charging pile, a third charging port M3 is connected with a positive terminal of a first charging gun of the second dc charging pile, and a fourth charging port M4 is connected with a positive terminal of a second charging gun of the second dc charging pile. Correspondingly, the four charging ports of the second charging/discharging terminal 20 are respectively connected to the negative terminals of the two charging guns of the corresponding first dc charging pile and the negative terminals of the two charging guns of the second dc charging pile, for example, the seventh charging port M7 is connected to the negative terminal of the second charging gun of the first dc charging pile, the eighth charging port M8 is connected to the negative terminal of the first charging gun of the first charging pile, the fifth charging port M5 is connected to the negative terminal of the second charging gun of the second dc charging pile, and the sixth charging port M6 is connected to the negative terminal of the first charging gun of the second dc charging pile, so that each charging gun can simultaneously charge each battery pack, and therefore, each battery pack can simultaneously realize four-gun charging, thereby increasing the charging current and shortening the charging duration.
The embodiment of the utility model provides an electric automobile is still provided, this electric automobile includes the utility model discloses the multi-branch way high-voltage topology circuit that arbitrary embodiment provided, perhaps carry out the utility model discloses arbitrary embodiment the control method of multi-branch way high-voltage topology circuit.
Wherein the electric vehicle may be a heavy truck vehicle.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, may be executed sequentially, or may be executed in different orders, as long as the desired result of the technical solution of the present invention can be achieved, and the present invention is not limited thereto.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A multi-branch high-voltage topology circuit, comprising: the device comprises a first switch, a second switch, at least two double parallel branches, a first charging and discharging terminal, a second charging and discharging terminal, a first control module and a second control module; wherein, two double parallel branches are respectively a first double parallel branch and a second double parallel branch;
the first electrode end of the first double parallel branch is electrically connected with the first end of the first switch, the first electrode end of the second double parallel branch is electrically connected with the first end of the second switch, and the second end of the first switch and the second end of the second switch are both electrically connected with the first charging and discharging terminal; the second end of the first switch is electrically connected with the second end of the second switch; the second electrode end of the first double parallel branch is electrically connected with the second electrode end of the second double parallel branch, and the second electrode end of the first double parallel branch is electrically connected with the second charging and discharging terminal;
the first control module is used for collecting the voltage of the first double parallel branch, and the second control module is used for collecting the voltage of the second double parallel branch and sending the voltage to the first control module;
the first control module is further configured to control the closing sequence of the first switch and the second switch when each dual parallel branch is powered on by discharging or charging.
2. The multi-branch high-voltage topology circuit according to claim 1, wherein said first electrode terminal is a positive terminal and said second electrode terminal is a negative terminal; or the first electrode end is a negative electrode end, and the second electrode end is a positive electrode end.
3. The multi-branch high-voltage topology circuit according to claim 1, wherein the first charge and discharge terminals comprise a first charge port, a second charge port, a third charge port, a fourth charge port, a first discharge port and a second discharge port;
the second charging and discharging terminal comprises a fifth charging port, a sixth charging port, a seventh charging port, an eighth charging port, a third discharging port and a fourth discharging port.
4. The multi-branch high-voltage topology circuit according to claim 3, further comprising a third switch between the first electrode terminal of the second dual-parallel branch and the first charging port, a fourth switch between the first electrode terminal of the second dual-parallel branch and the second charging port, a fifth switch between the first electrode terminal of the first dual-parallel branch and the third charging port, and a sixth switch between the first electrode terminal of the first dual-parallel branch and the fourth charging port.
5. The multi-branch high-voltage topology circuit according to any of claims 1 to 4, wherein the first control module is further configured to:
when each double parallel branch is discharged and electrified, and the voltage difference of each double parallel branch is greater than the preset voltage difference, the switch corresponding to the double parallel branch with high closing voltage is controlled, and when the voltage difference discharged to each double parallel branch is less than or equal to the preset voltage difference, the switch corresponding to the double parallel branch with low closing voltage is controlled;
when each double parallel branch is charged and electrified, and the voltage difference of each double parallel branch is greater than the preset voltage difference, the switch corresponding to the double parallel branch with low closing voltage is controlled, and when the voltage difference of each double parallel branch is less than or equal to the preset voltage difference after charging, the switch corresponding to the double parallel branch with high closing voltage is controlled.
6. The multi-branch high-voltage topology circuit according to any of claims 1 to 4, wherein the first control module is further configured to: and when each double parallel branch circuit is charged or discharged and the voltage difference of each double parallel branch circuit is less than or equal to the preset voltage difference, controlling the first switch and the second switch to be closed.
7. The multi-branch high-voltage topology circuit according to any of claims 1 to 4, further comprising: a heating system; each double parallel branch is provided with one heating system.
8. The multi-branch high-voltage topology circuit according to any of claims 1 to 4, wherein the first switch and the second switch are relay switches.
9. The multi-branch high voltage topology circuit according to any of claims 1 to 4, wherein said first dual parallel branch comprises a first branch and a second branch, and said second dual parallel branch comprises a third branch and a fourth branch; the first branch comprises a first battery pack, the second branch comprises a second battery pack, the third branch comprises a third battery pack, and the fourth branch comprises a fourth battery pack; the first control module is electrically connected with the communication port of each battery pack, the first switch, the second switch and the second control module;
the first control module and the second control module are further used for acquiring communication identification codes of communication ports of the battery packs respectively and controlling the communication ports of the battery packs to be in communication connection with the first to-be-connected charging pile or the second to-be-connected charging pile respectively.
10. An electric vehicle comprising a multi-branch high-voltage topology circuit according to any of claims 1 to 9.
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| CN202222996855.7U CN218783600U (en) | 2022-11-10 | 2022-11-10 | Multi-branch high-voltage topological circuit and electric automobile |
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| CN202222996855.7U CN218783600U (en) | 2022-11-10 | 2022-11-10 | Multi-branch high-voltage topological circuit and electric automobile |
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