CN219523732U - Multi-branch electric system - Google Patents
Multi-branch electric system Download PDFInfo
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- CN219523732U CN219523732U CN202320697495.2U CN202320697495U CN219523732U CN 219523732 U CN219523732 U CN 219523732U CN 202320697495 U CN202320697495 U CN 202320697495U CN 219523732 U CN219523732 U CN 219523732U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present utility model provides a multi-branch electrical system comprising: the system comprises a plurality of battery clusters, a plurality of manual maintenance switches, a plurality of battery cluster negative electrode relays, a battery cluster positive electrode relay, a first charge-discharge interface, a second charge-discharge interface and a battery management system, wherein one end of each battery cluster is connected with a corresponding manual maintenance switch, the other end of each battery cluster is connected with a corresponding battery cluster negative electrode relay, each manual maintenance switch is respectively connected with the battery cluster positive electrode relay, each battery cluster negative electrode relay is respectively connected with the second charge-discharge interface, the battery cluster positive electrode relay is connected with the first charge-discharge interface, and the battery management system is respectively connected with each battery cluster, each manual maintenance switch, each battery cluster negative electrode relay, the battery cluster positive electrode relay, the first charge-discharge interface and the second charge-discharge interface in a communication manner; the utility model can ensure that other battery clusters continue to work when the abnormality occurs in part of the battery clusters.
Description
Technical Field
The utility model relates to the field of electric heavy trucks, in particular to a multi-branch electric system.
Background
With the development of science and technology and the progress of times, urban areas limit traveling of large-scale traditional fuel trucks, so that transportation functions of cities are unbalanced, and in order to meet urban demands, pure electric trucks are designed by some whole factories so as to solve the problem that the trucks enter and exit the cities.
The electric truck is generally charged through a PDU (Power Distribution Unit), namely a power distribution unit for a cabinet, the PDU is a product designed for providing power distribution for electrical equipment installed in the cabinet, and has various series specifications of different functions, installation modes and different plug-in combinations, the existing electric heavy truck generally adopts a double-branch PDU system, a large number of battery packs cannot be simultaneously loaded for simultaneous operation, and when a part of battery packs have problems, the system cannot continue to operate, and the fault tolerance rate is lower.
Disclosure of Invention
In view of the above, the present utility model is to overcome the defects in the prior art, and provide a multi-branch electrical system.
The utility model provides the following technical scheme:
a multi-branch electrical system, comprising:
the battery management system comprises a plurality of battery clusters, a plurality of manual maintenance switches, a plurality of battery cluster negative electrode relays, a battery cluster positive electrode relay, a first charge-discharge interface, a second charge-discharge interface and a battery management system, wherein one end of each battery cluster is connected with a corresponding manual maintenance switch, the other end of each battery cluster is connected with a corresponding battery cluster negative electrode relay, each manual maintenance switch is respectively connected with the battery cluster positive electrode relay, each battery cluster negative electrode relay is respectively connected with the second charge-discharge interface, the battery cluster positive electrode relay is connected with the first charge-discharge interface, and the battery management system is respectively connected with each battery cluster, each manual maintenance switch, each battery cluster negative electrode relay, the battery cluster positive electrode relay, the first charge-discharge interface and the second charge-discharge interface in a communication manner.
In one embodiment, the electrical system further comprises: and the pre-charging module is connected with the battery cluster positive relay in parallel.
In one embodiment, the pre-charging module is composed of a pre-charging resistor and a pre-charging relay, and the pre-charging resistor and the pre-charging relay are connected in series and then connected with the battery cluster positive electrode relay in parallel.
In one embodiment, the first charge-discharge interface and the second charge-discharge interface are connected with electric equipment or a power supply.
In one embodiment, the first charge-discharge interface includes: the first positive pole that charges and second positive pole that charges, the second charge-discharge interface includes: the battery pack comprises a first charging negative electrode and a second charging negative electrode, wherein when the battery pack is charged, the first charging positive electrode and the second charging positive electrode are connected with the positive electrode of the power supply, and the first charging negative electrode and the second charging negative electrode are connected with the negative electrode of the power supply.
In one embodiment, the first charge-discharge interface includes: the first positive pole and the second positive pole that discharges of discharging, the second charge-discharge interface includes: the battery cluster is characterized by comprising a first discharging negative electrode and a second discharging negative electrode, wherein when the battery cluster is discharged, the first discharging positive electrode and the second discharging positive electrode are connected with the positive electrode output end of the electric equipment, and the first discharging negative electrode and the second discharging negative electrode are connected with the negative electrode output end of the electric equipment.
In one embodiment, the powered device or power source is communicatively coupled to the battery management system.
In one embodiment, the battery cluster is composed of a plurality of battery packs connected in series.
In one embodiment, the number of battery clusters is greater than 3.
In one embodiment, the number of manual maintenance switches is greater than 3.
Embodiments of the present utility model have the following advantages:
the multi-branch electric system provided by the utility model is quick to charge, and a user can select to charge by adopting a single gun or a double gun according to requirements, so that normal operation of work is ensured, and the working efficiency is improved; the utility model adopts multiple branches, can bear more battery packs to work, can be suitable for multi-battery cluster connection or single-battery cluster connection to work, improves the driving mileage and high-power operation capacity of heavy truck, can also split current, reduces the wire diameters of copper bars and power wire harnesses used by the branches, reduces the cost, improves the work fault tolerance of the system, and can continue to work under the abnormal condition of partial battery clusters.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a multi-branch electrical system frame structure provided by an embodiment of the present utility model;
FIG. 2 illustrates a frame structure diagram of yet another multi-branch electrical system provided by an embodiment of the present utility model;
FIG. 3 illustrates a block diagram of a precharge module framework provided by an embodiment of the present utility model;
fig. 4 shows a first charge-discharge interface frame structure diagram according to an embodiment of the present utility model;
fig. 5 shows a second charge-discharge interface frame structure diagram according to an embodiment of the present utility model.
Description of main reference numerals:
11-a first battery cluster; 12-a second battery cluster; 1N-nth battery cluster; 21-a first cluster negative relay; 22-a second cluster negative relay; 2N-nth battery cluster negative relay; 31-a first manual maintenance switch; 32-a second manual maintenance switch; 3N-nth manual maintenance switch; 40-a battery management system; 50-a battery cluster positive relay; 61-a first charge-discharge interface; 62-a second charge-discharge interface; a 70-precharge module; 71-pre-charging a resistor; 72-pre-charging a relay; 611-a first discharge positive electrode; 612-a second discharge positive electrode; 613-a first charge positive electrode; 614-a second charge positive electrode; 621-a first discharge anode; 622-a second discharge anode; 623-a first charge anode; 624-a second charge anode; s1-a first detection point; s2-a second detection point; s3-a third detection point; s4, a fourth detection point.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
Systems in which the electrical system is formed by low-voltage power supply components, also known as "low-voltage power distribution systems" or "low-voltage power distribution lines", are often associated with automation technology, so-called electrical system automation technology, which is the automated management of the electrical system, including the monitoring of electrical equipment, the checking of system faults, the protection of the electrical system, etc.
The present embodiment provides a multi-branch electrical system:
specifically, referring to fig. 1, fig. 1 is a frame structure diagram of a multi-branch electrical system provided by the present utility model, where the electrical system includes:
the battery management system 40 is connected with each battery cluster, each manual maintenance switch, each battery cluster negative relay, each battery cluster positive relay 50, each battery cluster negative relay, each manual maintenance switch, each battery cluster negative relay 50, each battery cluster positive relay 50 and each battery cluster, each manual maintenance switch, each battery cluster negative relay 50, each battery cluster positive relay 61 and each battery cluster positive relay 62, and each battery management system 40 is connected with each battery cluster, each battery cluster positive relay 50, each first charge-discharge interface 61 and each second charge-discharge interface 62 in a communication manner. For simplicity of the drawing, only the connection between the battery management system 40 and some of the elements is shown in fig. 1, and the actual battery management system 40 is in communication connection with each of the elements in fig. 1.
The battery management system (BMS, battery Management System) is mainly used for intelligently managing and maintaining each battery unit, preventing the battery from being overcharged and overdischarged, prolonging the service life of the battery and monitoring the state of the battery. The battery management system unit generally includes a plurality of functional modules such as a battery management system, a control module, a display module, a wireless communication module, an electrical device, a battery pack for supplying power to the electrical device, and an acquisition module for acquiring battery information of the battery pack.
The manual maintenance switch (MSD, manual service disconnect) is a high-voltage connector with a fuse, and is internally provided with a high-voltage fuse, so that the high-voltage fuse cuts off a high-voltage loop when the outside is short-circuited, and the protection effect is achieved. When the new energy electric vehicle is used for vehicle maintenance, the power supply of the high-voltage system can be disconnected by pulling out the MSD in order to ensure the safety of people and vehicles. The high-voltage power supply can realize electrical isolation of a high-voltage system and can also play a role in short-circuit protection.
Before the electric system works, the battery cluster positive relay 50 is firstly disconnected, other relays are detected, when no problem exists in detection, the electric system starts to work, and each battery cluster manual maintenance switch, each battery cluster negative relay and the switch of the battery cluster positive relay 50 are all conducted, so that charging or discharging of the battery cluster is realized. The battery management system 40 is responsible for monitoring the working states of the battery clusters, the battery cluster negative electrode relay, the battery cluster positive electrode relay 50, the battery cluster manual maintenance switch, the first charge-discharge interface 61 and the second charge-discharge interface 62, when detecting that a part of the battery clusters are in fault, the battery management system 40 can automatically disconnect the negative electrode relay connected with the battery cluster in fault, if detecting that a short circuit occurs, the battery cluster negative electrode relay connected with the short circuit battery cluster and the manual maintenance switch are disconnected at the same time, and because each battery cluster is connected with a corresponding manual maintenance switch and the battery cluster negative electrode relay, after the connection of the fault battery cluster is disconnected, other battery clusters can continue to work normally, so that the fault tolerance of the system is greatly improved, and when the battery clusters are in short circuit, the manual maintenance switch connected with the battery clusters is also automatically disconnected, so that the short circuit protection function is achieved, and the safety of maintenance personnel can be also protected.
In one embodiment, the battery clusters are formed by connecting a plurality of battery packs in series, the number of the battery clusters and the number of battery cluster negative relays are larger than 3, so that more battery packs can be conveniently loaded to work, each battery cluster can form a branch, the driving mileage and high-power operation capacity of a heavy truck are greatly improved, current can be shared, the wire diameter of copper bars and power wire bundles used by the branch is reduced, the cost is reduced, and a user can select and configure the proper number of battery clusters according to actual demands. Considering that too many branches can increase the current-carrying capacity of bus copper bars or cables, and the selection specification of parts is increased, so that the part selection is difficult, and 4 battery clusters and 4 battery cluster negative relays are generally selected to form 4 branches, which is more practical.
Referring to fig. 2, fig. 2 is a frame structure diagram of another multi-branch electrical system provided by the present utility model;
before the electrical system works, the battery management system 40 first receives the wake-up signal to perform self-checking, and detects the items of fire protection, insulation fault protection, battery cell discharge under-voltage alarm, battery cell discharge over-voltage protection, battery cell charge over-voltage alarm, battery cell charge over-voltage protection, cluster discharge under-voltage alarm, cluster discharge under-voltage protection, cluster discharge over-current alarm, cluster discharge over-current protection, stack bus discharge over-current alarm, stack bus discharge over-current protection, low temperature alarm, low temperature protection, over-temperature alarm, over-temperature protection, temperature difference over-large alarm, environment monitoring system communication abnormality and the like, if the items are abnormal, the operation is stopped, and the checking is performed to prevent accidents.
And if the relay is not abnormal, performing adhesion detection on the relay. Firstly, the first battery cluster cathode relay 21 is controlled to be closed, then the voltage formed at the first detection point S1 and the third detection point S3 is detected and compared with the voltage formed at the second detection point S2 and the third detection point S3, if the voltage is consistent or approximate, the relay is successfully closed, and if the voltage between the first detection point S1 and the third detection point S3 is zero, the relay is not closed. After the first battery cluster negative electrode relay 21 is closed, the BMS controls the first battery cluster negative electrode relay 21 to be opened again, then detects and compares the voltage formed by the first detection point S1 point and the third detection point S3 point with the voltage formed by the second detection point S2 point and the third detection point S3 point, if the voltages are consistent or approximate, the first battery cluster negative electrode relay 21 is not opened, and if the voltage between the first detection point S1 point and the third detection point S3 point is zero, the first battery cluster negative electrode relay 21 is opened. It is thus determined that the first battery cluster anode relay 21 can be normally used.
Similarly, according to the method, other battery cluster negative relays can be sequentially subjected to the following steps: the second battery cluster negative electrode relay 22 connected with the second battery cluster 12 and the N battery cluster negative electrode relay 2N connected with the N battery cluster 1N are subjected to bonding detection, whether other battery cluster negative electrode relays can be normally used or not is detected, and if the battery cluster negative electrode relays can be normally used, the electric system can be controlled to charge or discharge, so that the influence on the normal operation of the electric system due to the failure of the battery cluster negative electrode relay is avoided.
In one embodiment, referring to fig. 3, the electrical system further comprises:
the pre-charge module 70, the pre-charge module 70 is connected in parallel with the battery cluster positive relay 50 to pre-charge the battery cluster.
The pre-charging module 70 comprises a pre-charging resistor 71 and a pre-charging relay 72, the pre-charging resistor 71 and the pre-charging relay 72 are connected in series, and when the battery cluster is charged, the pre-charging relay 72 is closed to pre-charge the battery cluster.
The front end of the battery is provided with a larger capacitor, if no pre-charge is carried out, the positive relay 50 of the battery cluster is directly connected with the capacitor, the voltage of the battery is higher at the moment, the voltage on the capacitor is close to 0, the moment is equivalent to instant short circuit, the load resistor is the contact resistor of a lead and the relay, the resistance value is small, the voltage is large, the resistance is small, the instant current can obviously reach tens of thousands of amperes according to ohm law, and the main relay can be definitely damaged at the moment.
The pre-charging process is performed, the battery cluster positive relay 50 is firstly turned off, the pre-charging loop formed by the pre-charging relay and the pre-charging resistor is firstly turned on, the loop current can be reduced by increasing the pre-charging resistor, and the pre-charging loop safety is ensured, so that the relay and the load are ensured not to suffer from large current impact, and the use is ensured.
Specifically, referring to fig. 2, when the electrical system is discharged, after the adhesion detection is finished, the first cluster negative electrode relay 21, the second cluster negative electrode relay 22 and the nth cluster negative electrode relay 2N are simultaneously closed, then the precharge relay 72 is closed, the precharge circuit is started to precharge for about 350ms, when the voltage acquired by the fourth detection point S4 and the third detection point S3 is about equal to 97% of the rated voltage, the cluster positive electrode relay 50 is closed, the precharge relay 72 is opened, and then the battery cluster is discharged.
In one embodiment, referring to fig. 4 and 5, the first charge-discharge interface 61 further includes: the first discharge positive electrode 611 and the second discharge positive electrode 612, and the second charge-discharge interface 62 further includes: when the battery cluster discharges, the first discharge anode 611 and the second discharge anode 612 are connected with the anode output end of the electric equipment, and the first discharge anode 621 and the second discharge anode 622 are connected with the cathode output end of the electric equipment.
In the discharging process, referring to fig. 1, if the battery management system detects that the first battery cluster 11 has a problem, the first battery cluster negative relay 21 is turned off, so that a discharging loop of the first battery cluster 11 is cut off, the power is reduced to 0 within 30s, other battery clusters work normally, and similarly, when the battery management system detects that the other battery clusters have a problem, the battery cluster negative relay of the corresponding battery cluster is cut off, and the other battery clusters work normally, so that the fault tolerance of the system is greatly improved, but at least one battery cluster works normally, and the discharging state can be continued all the time.
If the first battery cluster 11 is detected to be short-circuited, the first manual maintenance switch 31 is turned off, so that the safety of the first battery cluster 11 is protected, and similarly, if the second battery cluster 12 or the Nth battery cluster 1N is short-circuited, the second manual maintenance switch 32 and the Nth manual maintenance switch 3N are turned off correspondingly.
In one embodiment, referring to fig. 4 and 5, the first charge-discharge interface 61 includes: first charge positive electrode 613 and second charge positive electrode 614, second charge-discharge interface 62 includes: when the battery pack is charged, the first charge anode 613 and the second charge anode 614 are connected to the power source anode, and the first charge anode 623 and the second charge anode 624 are connected to the power source anode.
According to the utility model, two charge-discharge interfaces are configured, a user can select to adopt a single gun or a double gun to charge according to requirements, so that normal operation of work is ensured, and the work efficiency is improved, for example: when the heavy truck is charged at night, a single gun can be used for charging, the charging time is long, the current is small, and the service life of the battery can be effectively prolonged. When the heavy truck is charged during daytime operation, double guns can be adopted for simultaneous charging, so that the charging time is effectively shortened under heavy current loading, the normal operation of the work is ensured, and the working efficiency is improved.
When the system is charged, the first charging and discharging interface 61 and the second charging and discharging interface 62 are respectively connected with a positive electrode and a negative electrode corresponding to the power supply, wherein the power supply can be a charger, the charger and the battery management system are in communication connection by adopting a communication protocol of GB/T27930, and in the whole charging stage, the battery management system sends a battery charging requirement to the charger in real time, and the charger adjusts charging voltage and charging current according to the battery charging requirement so as to ensure that the charging process is normally carried out. During charging, the charger and the battery management system send respective charge states to each other. In addition, the battery management system sends specific state information, voltage, temperature and other information of the power storage battery to the charger according to the requirement.
During charging, after the adhesion detection is finished, the first battery cluster negative electrode relay 21, the second battery cluster negative electrode relay 22 and the Nth battery cluster negative electrode relay 2N are simultaneously closed, then the pre-charging relay 72 is closed, a pre-charging loop is started for pre-charging for about 350ms, when the collected voltage of the fourth detection point S4 and the third detection point S3 is about equal to 97% of rated voltage, the battery cluster positive electrode relay 50 is closed, the pre-charging relay 72 is opened, and then the charging relay is closed for battery charging.
In one embodiment, the first discharge positive electrode 611, the second discharge positive electrode 612, the first discharge negative electrode 621, the second discharge negative electrode 622, the first charge positive electrode 613, the second charge positive electrode 614, the first charge negative electrode 623, and the second charge negative electrode 624 are each provided with a corresponding relay.
When the single gun charging is adopted, the relay of the first discharging positive electrode 611, the relay of the second discharging positive electrode 612 and the relay of the first charging positive electrode 613 are disconnected, so that direct output of charging current is avoided. When the total voltage reaches 3.6 x n (the number of the single battery cells connected in series), the charging current is reduced by 60%, and the charging is continued. When the total voltage reaches 3.6xn again, the charging current decreases by 60% again, and charging is continued. When the total voltage reaches 3.6n for the third time, the charging current is reduced by 60% again, and the charging is continued until the full charge is reached.
After the battery is used for a long time, a pressure difference phenomenon exists among the battery core monomers. In the charging strategy, the cell voltage has a protection threshold, when the cell voltage of a certain cell reaches 3.6V, the down-flow charging is started, and other cell voltages are much smaller than 3.6, so that more cells can be charged. The current-reducing charging is used for ensuring that the voltage difference of the single cells of the whole battery cluster is smaller, the balance is better, and meanwhile, the charging capacity of the battery cluster is more under the premise of ensuring safety.
When the double gun charge is employed, the relay of the first discharge positive electrode 611 and the relay of the second discharge positive electrode 612 are turned off. In the charging process, when the total voltage reaches 3.6×n, the charging current is reduced by 60%, and charging is continued. When the total voltage reaches 3.6xn again, the charging current decreases by 60% again, and charging is continued. When the total voltage reaches 3.6n for the third time, the charging current is reduced by 60% again, and the charging is continued until the full charge is reached. The double guns are charged with large current, so that the charging time can be obviously shortened.
Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. A multi-branch electrical system, comprising: the system comprises a plurality of battery clusters, a plurality of manual maintenance switches, a plurality of battery cluster negative relays, a battery cluster positive relay, a first charge-discharge interface, a second charge-discharge interface and a battery management system;
one end of each battery cluster is connected with a corresponding manual maintenance switch, the other end of each battery cluster is connected with a corresponding battery cluster negative electrode relay, each manual maintenance switch is connected with a battery cluster positive electrode relay, each battery cluster negative electrode relay is connected with a second charge-discharge interface, the battery cluster positive electrode relay is connected with a first charge-discharge interface, and the battery management system is connected with each battery cluster, each manual maintenance switch, each battery cluster negative electrode relay, the battery cluster positive electrode relay, the first charge-discharge interface and the second charge-discharge interface in a communication mode.
2. The multi-branch electrical system according to claim 1, wherein the electrical system further comprises: and the pre-charging module is connected with the battery cluster positive relay in parallel.
3. The multi-branch electrical system according to claim 2, wherein the precharge module comprises a precharge resistor and a precharge relay, the precharge resistor being in series with the precharge relay.
4. The multi-branch electrical system of claim 1, wherein the first charge-discharge interface and the second charge-discharge interface are connected to a powered device or a power source, respectively.
5. The multi-branch electrical system according to claim 4, wherein the first charge-discharge interface comprises: the first positive pole that charges and second positive pole that charges, the second charge-discharge interface includes: the battery pack comprises a first charging negative electrode and a second charging negative electrode, wherein when the battery pack is charged, the first charging positive electrode and the second charging positive electrode are connected with the positive electrode of the power supply, and the first charging negative electrode and the second charging negative electrode are connected with the negative electrode of the power supply.
6. The multi-branch electrical system according to claim 4, wherein the first charge-discharge interface comprises: the first positive pole and the second positive pole that discharges of discharging, the second charge-discharge interface includes: the battery cluster is characterized by comprising a first discharging negative electrode and a second discharging negative electrode, wherein when the battery cluster is discharged, the first discharging positive electrode and the second discharging positive electrode are connected with the positive electrode output end of the electric equipment, and the first discharging negative electrode and the second discharging negative electrode are connected with the negative electrode output end of the electric equipment.
7. The multi-branch electrical system of claim 4, wherein the powered device or power source is communicatively coupled to the battery management system.
8. The multi-branch electrical system of claim 1, wherein the battery cluster is comprised of a plurality of battery packs connected in series.
9. The multi-branch electrical system according to claim 1, wherein the number of battery clusters is greater than 3.
10. The multi-branch electrical system according to claim 1, wherein the number of manual maintenance switches is greater than 3.
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| CN202320697495.2U CN219523732U (en) | 2023-03-31 | 2023-03-31 | Multi-branch electric system |
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| CN202320697495.2U CN219523732U (en) | 2023-03-31 | 2023-03-31 | Multi-branch electric system |
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