Double-branch high-voltage box circuit
By designing a dual branch high-voltage box circuit, the first connection module and the second connection module are used to form two charging and discharging circuits, the problem that a single branch high-voltage box cannot achieve two charging and discharging at the same time is solved, and cost reduction and space are achieved Saving and efficient charging and discharging functions.
Patent Information
- Application Number
- CN202420931709.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-29
AI Technical Summary
Most of the existing high-voltage boxes are designed with single branch circuits, and two-channel charging and two-channel discharge cannot be achieved at the same time, resulting in the inability to be arranged in the event of insufficient space, which increases cost and space waste.
A double branch high voltage box circuit is designed, and two positive and negative circuits of charge and discharge circuits are formed through the first connection module and the second connection module respectively, and the two charge and discharge input and output circuits are realized by combining the controller, guard and relay.
It achieves cost reduction and space savings compared with single branch high-voltage box, while taking into account the input and output of two charging and discharging channels, improving space utilization and providing good protection effects.
Smart Images
Figure CN222441389U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy storage, in particular to a double-branch high-voltage box circuit. Background Art
[0002] With the development of high-voltage DC side technology, the main energy mode is powered by battery packs. The high-voltage box is responsible for the power distribution and management of new energy high-voltage systems, providing the whole vehicle with charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, low-voltage control and other functions to protect and monitor the operation of the high-voltage system.
[0003] A battery pack BDU structure with publication number CN214797624U includes a BDU shell installed on the battery pack and an electrical component assembly located in the BDU shell, the electrical component assembly includes a main positive relay, a fast charging positive relay and a safety switch for controlled disconnection when the carrier of the battery pack is impacted, the main positive relay is connected in parallel with the fast charging positive relay, and one end of the main positive relay and one end of the fast charging positive relay are connected in series with the same end of the safety switch.
[0004] Currently, most high-voltage boxes are in the form of a single branch, that is, one branch for charging and one branch for discharging. When two branches are required for charging and discharging, two high-voltage boxes are usually used to achieve this. When there is insufficient space, there will be problems with the arrangement, and it will lead to increased costs. Utility Model Content
[0005] In view of this, the utility model proposes a dual-branch high-voltage box circuit, which can reduce the cost of existing high-voltage boxes while taking into account two-way charging and discharging input and output, and can save layout space and improve space utilization compared to a single-branch high-voltage box.
[0006] The technical solution of the utility model is implemented as follows: The utility model provides a double-branch high-voltage box circuit, including a first connection module and a second connection module, wherein:
[0007] The first connection module has at least two positive first connection terminals and at least two positive second connection terminals, the positive first connection terminals are electrically connected to the corresponding positive second connection terminals to form a positive charging circuit, the at least two positive first connection terminals are respectively electrically connected to the positive poles of the corresponding battery modules, and the at least two positive second connection terminals are respectively electrically connected to the positive poles of the device to be charged;
[0008] The second connection module has at least two negative first connection terminals and at least two negative second connection terminals. The negative first connection terminals are electrically connected to the corresponding negative second connection terminals to form a negative charging circuit. At least two negative first connection terminals are respectively electrically connected to the negative poles of the corresponding battery modules, and at least two negative second connection terminals are respectively electrically connected to the negative poles of the device to be charged.
[0009] On the basis of the above technical solution, preferably, it also includes a controller, and the first connection module also includes at least two first protective elements and at least two first relays, wherein the common end of the at least two positive first connection ends of the first connection module is electrically connected to one end of each of the first protective elements, and the other end of the first protective element is electrically connected to one end of the corresponding contact of the first relay, and the other end of the contact of the first relay is electrically connected to the positive second connection end corresponding to the first connection module, and the coils of the at least two first relays and the input ends of the at least two first protective elements are electrically connected to the output end of the controller.
[0010] On the basis of the above technical solution, preferably, the number of the first protective members is the same as the number of the first relays, the positive first connection terminals and the positive second connection terminals.
[0011] On the basis of the above technical solution, preferably, the second connection module also includes at least two current measuring devices and at least two second relays, wherein the at least two negative first connection terminals of the second connection module are respectively electrically connected to one end of the corresponding current measuring device, the other ends of the at least two current measuring devices are electrically connected, the common ends of the at least two current measuring devices are respectively electrically connected to one end of the contact of each second relay, the other end of the contact of the second relay is electrically connected to the negative second connection terminal corresponding to the second connection module, and the coils of the at least two second relays are both electrically connected to the output end of the controller.
[0012] On the basis of the above technical solution, preferably, it also includes a DCDC connection module, which includes a connection port, a second protective element, a third relay, a main circuit positive connection terminal and a main circuit negative connection terminal, wherein the positive input terminal of the connection port is electrically connected to one end of the second protective element, the other end of the second protective element is respectively electrically connected to the other end of any one of the first protective elements and the positive connection terminal of the main circuit, the negative input terminal of the connection port is respectively electrically connected to the common end of at least two current measuring elements and one end of the contact of the third relay, and the other end of the contact of the third relay is electrically connected to the negative connection terminal of the main circuit.
[0013] On the basis of the above technical scheme, preferably, it also includes a heating module, and the heating modules include at least two heating ports, a fourth relay, a fifth relay, a sixth relay and a communication interface, wherein the positive input terminals of at least two heating ports are electrically connected, and are commonly connected to one end of the contact of the corresponding fourth relay, the other end of the contact of the fourth relay is respectively electrically connected to the other end of the second protective element and one end of the contact of the fifth relay, and the other end of the contact of the fifth relay is electrically connected to the positive output terminal of the communication interface; the negative input terminals of at least two heating ports are electrically connected, and are commonly connected to one end of the contact of the sixth relay, and the other end of the contact of the sixth relay is respectively electrically connected to the common end of at least two current measuring elements and the negative output terminal of the communication interface, and the coils of the fourth relay, the fifth relay and the sixth relay are all electrically connected to the output terminal of the controller.
[0014] On the basis of the above technical solution, preferably, the number of the current measuring components is the same as the number of the negative first connecting terminals, the negative second connecting terminals and the second relays.
[0015] On the basis of the above technical solution, preferably, the first protective element is MSD.
[0016] On the basis of the above technical solution, preferably, the second protective member is a fuse.
[0017] On the other hand, a double-branch high-voltage box system is proposed, such as the double-branch high-voltage box circuit described above.
[0018] The double-branch high-voltage box circuit of the utility model has the following beneficial effects compared with the prior art:
[0019] (1) The first connection module has two positive charge and discharge circuits, and the second connection module has two negative charge and discharge circuits, forming two charge and discharge input and output circuits. The two positive charge and discharge circuits cooperate with the two negative charge and discharge circuits to form two charge and discharge input and output circuits. Compared with the existing single-branch high-voltage box, the cost of the existing high-voltage box can be reduced while taking into account the two-way charge and discharge input and output, and the layout space can be saved, thereby improving the space utilization rate;
[0020] (2) The first protective element can provide good protection. When a short circuit occurs in the high-voltage circuit outside the vehicle, the first protective element will immediately disconnect the internal fuse and quickly separate the connection of the high-voltage circuit, thereby protecting the safety of maintenance personnel;
[0021] (3) The second protective element can provide overcurrent protection in the DCDC connection module to prevent excessive current from damaging the circuit, thus achieving good protective effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a system block diagram of the double-branch high-voltage box circuit of the utility model;
[0024] Figure 2 The utility model is a circuit schematic diagram of a double-branch high-voltage box circuit.
[0025] Reference numerals:
[0026] 1. First connection module; 2. Second connection module; 3. Controller; 4. DCDC connection module; 5. Heating module; 11. First protection element; 12. First relay; 13. First positive connection terminal; 14. Second positive connection terminal; 21. Current measurement element; 22. Second relay; 23. First negative connection terminal; 24. Second negative connection terminal; 41. Connection port; 42. Second protection element; 43. Third relay; 44. Main circuit positive connection terminal; 45. Main circuit negative connection terminal; 51. Heating port; 52. Fourth relay; 53. Fifth relay; 54. Sixth relay; 55. Communication interface. DETAILED DESCRIPTION
[0027] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] like Figure 1-2 As shown, a dual-branch high-voltage box circuit of the utility model includes a first connection module 1 and a second connection module 2, wherein the first connection module 1 has at least two positive first connection terminals 13 and at least two positive second connection terminals 14, at least two positive first connection terminals 13 are respectively electrically connected to the positive poles of the corresponding battery modules, and at least two positive second connection terminals 14 are respectively electrically connected to the positive poles of the devices to be charged; the second connection module 2 has at least two negative first connection terminals 23 and at least two negative second connection terminals 24, at least two negative first connection terminals 23 are respectively electrically connected to the negative poles of the corresponding battery modules, and at least two negative second connection terminals 24 are respectively electrically connected to the negative poles of the devices to be charged.
[0029] It should be noted that in this embodiment, the number of the positive first connection terminal 13 and the positive second connection terminal 14, the negative first connection terminal 23 and the negative second connection terminal 24 are the same, and the number is two. Among them, the two positive first connection terminals 13 are electrically connected to the corresponding positive second connection terminals 14 respectively, forming two charging and discharging positive circuits, and the two negative first connection terminals 23 are electrically connected to the corresponding negative second connection terminals 24 respectively, forming two charging and discharging negative circuits. Through the cooperation of the two charging and discharging positive circuits and the two charging and discharging negative circuits, two charging and discharging input and output circuits are formed. Compared with the existing single-branch high-voltage box, the cost of the existing high-voltage box can be reduced while taking into account the two-way charging and discharging input and output, and the layout space can be saved to improve space utilization.
[0030] This embodiment also includes a controller 3, and the first connection module 1 also includes at least two first protective elements 11 and at least two first relays 12, wherein the common end of the at least two positive first connection terminals 13 of the first connection module 1 is electrically connected to one end of each first protective element 11, and the other end of the first protective element 11 is electrically connected to one end of the contact of the corresponding first relay 12, and the other end of the contact of the first relay 12 is electrically connected to the positive second connection terminal 14 corresponding to the first connection module 1, and the coils of the at least two first relays 12 and the input ends of the at least two first protective elements 11 are electrically connected to the output end of the controller 3.
[0031] It should be noted that a signal is sent to at least two first relays 12 through the controller 3, so that the coil of the first relay 12 is energized and a magnetic field is generated. The magnetic field further attracts the contacts inside the first relay 12, so that the contacts are closed or opened, thereby realizing the on and off of the positive charging and discharging circuit. In addition, each positive charging and discharging circuit is provided with a first protective element 11. The first protective element 11 in this embodiment is an MSD. The MSD has a high-voltage interlocking function. When a short circuit occurs in the high-voltage line outside the vehicle, the MSD will immediately disconnect the internal fuse and quickly separate the connection of the high-voltage circuit, thereby protecting the safety of the maintenance personnel. At the same time, the high-voltage circuit can be quickly disconnected or connected through the MSD, and the maintenance personnel can complete the replacement or maintenance of the high-voltage components more quickly, thereby improving the maintenance efficiency.
[0032] In this embodiment, the number of the first protective element 11, the first relay 12, the positive first connection terminal 13 and the positive second connection terminal 14 is the same, and the number is two. The positive first connection terminal 13 is electrically connected to the first protective element 11, the first relay 12 and the positive second connection terminal 14 in sequence to form a positive charging and discharging circuit.
[0033] As a preferred embodiment, the second connection module 2 in this embodiment also includes at least two current measuring components 21 and at least two second relays 22, wherein at least two negative first connection terminals 23 of the second connection module 2 are respectively electrically connected to one end of the corresponding current measuring components 21, the other ends of at least two current measuring components 21 are electrically connected, the common ends of at least two current measuring components 21 are respectively electrically connected to one end of the contact of each second relay 22, the other end of the contact of the second relay 22 is electrically connected to the negative second connection terminal 24 corresponding to the second connection module 2, and the coils of at least two second relays 22 are both electrically connected to the output end of the controller 3.
[0034] It should be noted that, by sending a signal to at least two second relays 22 through the controller 3, the coils of the second relays 22 are energized to generate a magnetic field, which further attracts the contacts inside the second relays 22 to close or open the contacts, thereby realizing the on and off of the negative charging and discharging circuits. In addition, each negative charging and discharging circuit is provided with a current measuring device 21, which is a current sensor. The current measuring device 21 provided can monitor and measure the charging and discharging current of the battery to ensure the safe and efficient operation of the battery. During the charging process, the current sensor can monitor the size of the charging current in real time. When an excessive current or an abnormal situation is detected, the system will automatically cut off the power supply to prevent battery overheating safety issues.
[0035] The current measuring device 21 in this embodiment has the same number as the negative first connection terminal 23, the negative second connection terminal 24 and the second relay 22, and the number is two. The negative first connection terminal 23 is electrically connected to the current measuring device 21, the second relay 22 and the negative second connection terminal 24 in sequence to form a negative charging and discharging circuit.
[0036] The present embodiment also includes a DCDC connection module 4, which includes a connection port 41, a second protective element 42, a third relay 43, a main circuit positive connection terminal 44 and a main circuit negative connection terminal 45, wherein the positive input terminal of the connection port 41 is electrically connected to one end of the second protective element 42, the other end of the second protective element 42 is electrically connected to the other end of any first protective element 11 and the main circuit positive connection terminal 44, the negative input terminal of the connection port 41 is electrically connected to the common end of at least two current measuring elements 21 and one end of the contact of the third relay 43, and the other end of the contact of the third relay 43 is electrically connected to the main circuit negative connection terminal 45.
[0037] It should be noted that the external current or voltage signal is input through the connection port 41, and the control signal is sent to the third relay 43 through the controller 3, so that the coil of the third relay 43 is energized to generate a magnetic field, which further attracts the contacts inside the third relay 43 to close or open the contacts, thereby realizing the on and off of the positive and negative poles of the control main circuit, and the external current or voltage signal is finally output through the main circuit positive connection terminal 44 and the main circuit negative connection terminal 45.
[0038] In addition, the second protective member 42 in the present embodiment is a fuse. The second protective member 42 is set to provide overcurrent protection in the DCDC connection module 4 to prevent excessive current from damaging the circuit. When an abnormal situation such as a short circuit or overload occurs in the circuit, resulting in excessive current, the fuse will quickly blow, cutting off the circuit to prevent the current from further increasing, thereby protecting other components in the circuit from damage. At the same time, the fuse has a certain operating temperature range. When the temperature in the circuit is too high, the fuse may blow due to overheating, thereby playing a role of overheat protection and isolation. After the fuse blows, its two ends will be disconnected, thereby playing a role of isolation, preventing the fault from expanding, and providing good protection effects.
[0039] The present embodiment also includes a heating module 5, and the heating module 5 includes at least two heating ports 51, a fourth relay 52, a fifth relay 53, a sixth relay 54 and a communication interface 55, wherein the positive input terminals of at least two heating ports 51 are electrically connected, and are electrically connected to one end of the contact of the corresponding fourth relay 52 in common, the other end of the contact of the fourth relay 52 is electrically connected to the other end of the second protective member 42 and one end of the contact of the fifth relay 53, respectively, and the other end of the contact of the fifth relay 53 is electrically connected to the positive output terminal of the communication interface 55; the negative input terminals of at least two heating ports 51 are electrically connected, and are electrically connected to one end of the contact of the sixth relay 54 in common, the other end of the contact of the sixth relay 54 is electrically connected to the common end of at least two current measuring members 21 and the negative output terminal of the communication interface 55, and the coils of the fourth relay 52, the fifth relay 53 and the sixth relay 54 are electrically connected to the output terminal of the controller 3.
[0040] It should be noted that there are two heating ports 51 in this embodiment. The heating port 51 inputs a heating current or voltage signal, and sends a control signal to the fourth relay 52, the fifth relay 53 and the sixth relay 54 through the controller 3, so that the coils of the fourth relay 52, the fifth relay 53 and the sixth relay 54 are energized to generate a magnetic field, which further attracts the contacts inside the fourth relay 52, the fifth relay 53 and the sixth relay 54, so that the contacts are closed or opened, thereby realizing the on and off control of the heating module 5, and the signal is finally output to the outside through the communication interface 55.
[0041] On the other hand, a dual-branch high-voltage box system is proposed, such as the dual-branch high-voltage box circuit described above, and this embodiment is the same as the dual-branch high-voltage box circuit embodiment described above.
[0042] Working principle:
[0043] The two positive first connection terminals 13 are electrically connected in sequence with the two first protection components 11, the two first relays 12 and the two positive second connection terminals 14 to form two positive charging and discharging circuits. The two negative first connection terminals 23 are electrically connected in sequence with the two current measuring components 21, the two second relays 22 and the two negative second connection terminals 24 to form two negative charging and discharging circuits. The two positive first connection terminals 13 and the two negative first connection terminals 23 are respectively connected to the corresponding battery modules, and the two positive second connection terminals 14 and the two negative second connection terminals 24 are respectively connected to the corresponding devices to be charged, thereby realizing two charging and discharging input and output circuits.
[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A double-branch high-voltage box circuit, characterized in that: It comprises a first connection module (1) and a second connection module (2), wherein: The first connection module (1) has at least two positive first connection terminals (13) and at least two positive second connection terminals (14), the positive first connection terminals (13) are electrically connected to the corresponding positive second connection terminals (14) to form a positive charging circuit, the at least two positive first connection terminals (13) are respectively electrically connected to the positive poles of the corresponding battery modules, and the at least two positive second connection terminals (14) are respectively electrically connected to the positive poles of the device to be charged; The second connection module (2) has at least two negative first connection terminals (23) and at least two negative second connection terminals (24); the negative first connection terminals (23) are electrically connected to the corresponding negative second connection terminals (24) to form a negative charging circuit; the at least two negative first connection terminals (23) are respectively electrically connected to the negative poles of the corresponding battery modules; and the at least two negative second connection terminals (24) are respectively electrically connected to the negative poles of the equipment to be charged.
2. The double-branch high-voltage box circuit according to claim 1, characterized in that: It also includes a controller (3), and the first connection module (1) also includes at least two first protection elements (11) and at least two first relays (12), wherein the common end of the at least two positive first connection ends (13) of the first connection module (1) is respectively electrically connected to one end of each of the first protection elements (11), the other end of the first protection element (11) is respectively electrically connected to one end of the contact of the corresponding first relay (12), the other end of the contact of the first relay (12) is electrically connected to the positive second connection end (14) corresponding to the first connection module (1), and the coils of the at least two first relays (12) and the input ends of the at least two first protection elements (11) are both electrically connected to the output end of the controller (3).
3. The double-branch high-voltage box circuit according to claim 2, characterized in that: The number of the first protection elements (11) is the same as the number of the first relays (12), the positive first connection terminals (13) and the positive second connection terminals (14).
4. The double-branch high-voltage box circuit according to claim 2, characterized in that: The second connection module (2) further comprises at least two current measuring devices (21) and at least two second relays (22), wherein the at least two negative first connection terminals (23) of the second connection module (2) are respectively electrically connected to one end of the corresponding current measuring device (21), the other ends of the at least two current measuring devices (21) are electrically connected, the common ends of the at least two current measuring devices (21) are respectively electrically connected to one end of the contact of each second relay (22), the other end of the contact of the second relay (22) is electrically connected to the negative second connection terminal (24) corresponding to the second connection module (2), and the coils of the at least two second relays (22) are both electrically connected to the output end of the controller (3).
5. The double-branch high-voltage box circuit according to claim 4, characterized in that: The invention also comprises a DCDC connection module (4), wherein the DCDC connection module (4) comprises a connection port (41), a second protection element (42), a third relay (43), a main circuit positive connection terminal (44) and a main circuit negative connection terminal (45), wherein the positive input terminal of the connection port (41) is electrically connected to one end of the second protection element (42), the other end of the second protection element (42) is electrically connected to the other end of any one of the first protection elements (11) and the main circuit positive connection terminal (44), the negative input terminal of the connection port (41) is electrically connected to the common end of the at least two current measuring elements (21) and one end of the contact of the third relay (43), and the other end of the contact of the third relay (43) is electrically connected to the main circuit negative connection terminal (45).
6. The double-branch high-voltage box circuit according to claim 5, characterized in that: The device also includes a heating module (5), wherein the heating module (5) includes at least two heating ports (51), a fourth relay (52), a fifth relay (53), a sixth relay (54) and a communication interface (55), wherein the positive input ends of the at least two heating ports (51) are electrically connected and are electrically connected to one end of the contact of the corresponding fourth relay (52), the other end of the contact of the fourth relay (52) is electrically connected to the other end of the second protective element (42) and one end of the contact of the fifth relay (53), and the fifth relay (54) is electrically connected to the other end of the second protective element (42) and the other end of the contact of the fifth relay (53). The other end of the contact of the at least two heating ports (51) is electrically connected to the positive output end of the communication interface (55); the negative input ends of the at least two heating ports (51) are electrically connected and are commonly connected to one end of the contact of the sixth relay (54); the other end of the contact of the sixth relay (54) is electrically connected to the common end of the at least two current measuring devices (21) and the negative output end of the communication interface (55), respectively; the coils of the fourth relay (52), the fifth relay (53) and the sixth relay (54) are all electrically connected to the output end of the controller (3).
7. The double-branch high-voltage box circuit according to claim 4, characterized in that: The number of the current measuring elements (21) is the same as the number of the negative first connecting terminals (23), the negative second connecting terminals (24) and the second relays (22).
8. The double-branch high-voltage box circuit according to claim 2, characterized in that: The first protective element (11) is an MSD.
9. The double-branch high-voltage box circuit according to claim 5, characterized in that: The second protection element (42) is a fuse.