CN211335650U - Battery system of electric passenger vehicle and electric passenger vehicle - Google Patents
Battery system of electric passenger vehicle and electric passenger vehicle Download PDFInfo
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- CN211335650U CN211335650U CN201920938493.1U CN201920938493U CN211335650U CN 211335650 U CN211335650 U CN 211335650U CN 201920938493 U CN201920938493 U CN 201920938493U CN 211335650 U CN211335650 U CN 211335650U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model provides an electronic passenger car battery system and electronic passenger car. This electric passenger car battery system includes: the control device is respectively connected with the first group of direct current battery clusters and the second group of direct current battery clusters; wherein the control device controls the first group of DC battery clusters and the second group of DC battery clusters to be connected in series, so that the first group of DC battery clusters and the second group of DC battery clusters enter a charging state; the control device controls the first group of direct current battery clusters and the second group of direct current battery clusters to be connected in parallel, so that the first group of direct current battery clusters and the second group of direct current battery clusters enter a discharging state. The battery system of the electric passenger vehicle adjusts the series-parallel connection relation between the battery clusters along with the charging and discharging working conditions, so that the charging power is improved, and the charging time is shortened.
Description
Technical Field
The utility model relates to an electronic passenger car technical field to more specifically relates to electronic passenger car battery system and electronic passenger car.
Background
Currently, the charging voltage or discharging voltage of a battery system in an electric passenger vehicle is generally between 300V and 500V, wherein the charging current is approximately 1C (i.e., the cumulative charging time from the minimum SOC to the maximum SOC takes 1 hour). In this case, the time required for charging the power storage battery once is long, and traveling and use of the electric passenger vehicle are limited.
On the other hand, in view of the fact that the charging voltage is fixed, in order to shorten the charging time, it is common to increase the charging current to increase the charging power and thus shorten the charging time. However, the larger the charging current is, the larger the corresponding overcurrent value of the cable, the copper bar or the connector on the charging circuit is, and the larger the volume and weight of each cable, copper bar or connector are. Therefore, a battery system charged with a large current has a high cost and poor practicability.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electronic passenger car battery system and electronic passenger car to overcome the low, long problem of charge time of present electronic passenger car battery system's charge efficiency.
In a first aspect, the utility model provides an electronic passenger car battery system, include:
the control device is respectively connected with the first group of direct current battery clusters and the second group of direct current battery clusters; wherein the content of the first and second substances,
the control device controls the first group of direct current battery clusters and the second group of direct current battery clusters to be connected in series, so that the first group of direct current battery clusters and the second group of direct current battery clusters enter a charging state;
the control device controls the first group of direct current battery clusters and the second group of direct current battery clusters to be connected in parallel, so that the first group of direct current battery clusters and the second group of direct current battery clusters enter a discharging state.
Furthermore, the battery system of the electric passenger vehicle,
the control device comprises a series relay;
when the two ends of the series relay are respectively connected with a first pole of the first group of direct-current battery clusters and a second pole of the second group of direct-current battery clusters, the first group of direct-current battery clusters and the second group of direct-current battery clusters are in a charging state, and electric energy is obtained through a charging gun;
wherein the content of the first and second substances,
the first pole and the second pole have opposite polarities.
Furthermore, the battery system of the electric passenger vehicle,
the control device comprises a first parallel relay, an equalizing resistor and a voltage equalizing relay;
the equalizing resistor is connected with the voltage equalizing relay in series;
connecting the first pole of the first group of DC battery clusters and the first pole of the second group of DC battery clusters at the two ends of the first parallel relay respectively, and
the non-series end of the equalizing resistor is connected with the second pole of the first group of direct current battery clusters, an
When the non-series end of the voltage equalizing relay is connected with the two poles of the second group of direct current battery clusters,
before the voltage between the first group of direct current battery clusters and the second group of direct current battery clusters reaches equilibrium, one of the first group of direct current battery clusters and the second group of direct current battery clusters is in a discharging state, and the other one of the first group of direct current battery clusters and the second group of direct current battery clusters is in a charging state;
wherein the content of the first and second substances,
the first pole and the second pole have opposite polarities.
Furthermore, the battery system of the electric passenger vehicle,
the control device further comprises a second parallel relay;
connecting the first pole of the first group of DC battery clusters and the first pole of the second group of DC battery clusters at the two ends of the first parallel relay respectively, and
when the two ends of the second parallel relay are respectively connected with the second pole of the first group of direct current battery clusters and the second pole of the second group of direct current battery clusters,
the first group of direct current battery clusters and the second group of direct current battery clusters are in a discharging state, and electric energy is provided for a load of the whole vehicle.
Further, the battery system of the electric passenger vehicle further comprises:
a charging terminal;
the charging terminal is used for being connected with a charging gun; wherein the content of the first and second substances,
when the first group of direct current battery clusters and the second group of direct current battery clusters are in a charging state,
the charging voltage applied between the positive electrode and the negative electrode of the first group of direct current battery clusters or the second group of direct current battery clusters is a first voltage value;
the charging current flowing through the charging terminal is a first current value.
Further, the battery system of the electric passenger vehicle further comprises:
a series cable for connecting both ends of the series relay to the first group of dc battery clusters and the second group of dc battery clusters, respectively;
the sectional area of the series cable is matched with the charging current.
Further, the battery system of the electric passenger vehicle further comprises:
a charging cable for connecting the charging terminal to the first set of DC battery clusters or the second set of DC battery clusters;
the sectional area of the charging cable is matched with the charging current.
Further, the battery system of the electric passenger vehicle further comprises:
a discharge terminal;
the discharge terminal is used for being connected with the load of the whole vehicle; wherein the content of the first and second substances,
when the first group of direct current battery clusters and the second group of direct current battery clusters are in a discharging state,
the discharge voltage represented between the positive electrode and the negative electrode of the first group of direct current battery clusters or the second group of direct current battery clusters is a second voltage value;
the discharge current flowing through the discharge terminal is a second current value.
Further, the battery system of the electric passenger vehicle further comprises:
the first parallel cable is used for respectively connecting two ends of the first parallel relay to the first group of direct current battery clusters and the second group of direct current battery clusters;
the second parallel cable is used for respectively connecting two ends of the second parallel relay to the first group of direct current battery clusters and the second group of direct current battery clusters;
the cross-sectional area of the first parallel cable or the second parallel cable is adapted to the discharge voltage or the discharge current.
Further, the battery system of the electric passenger vehicle further comprises:
a discharge cable for connecting the discharge terminal to the first or second set of dc battery clusters;
the sectional area of the discharge cable is matched with the discharge current.
In a second aspect, the present invention also provides an electric passenger vehicle provided with the battery system described in the first aspect.
Compared with the prior art, the utility model discloses an electronic passenger car battery system adjusts the series-parallel relation between the battery cluster along with charge-discharge operating mode. During charging, the battery clusters are in series connection; adopt the cable, copper bar or the connector that are fit for higher voltage class in charging circuit to improve charging power, shortened the charging time. When discharging, the battery clusters are in parallel connection; and cables, copper bars or connectors with conventional voltage levels are adopted in the discharging loop.
The battery system of the electric passenger car improves the charging power, shortens the charging time, reduces the research and development cost and the production cost, and integrally improves the economical efficiency of the battery system and the electric passenger car.
This battery system of electronic passenger car has reduced the volume and the weight of cable, copper bar or connector in the charge-discharge circuit on the whole, and this battery system that charges of higher voltage level is with high costs, and the practicality is strong.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings:
fig. 1 is a schematic composition diagram of an electric passenger vehicle battery system according to a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of the components and connections of the battery system of the electric passenger vehicle according to the preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of the connections of the battery system of FIG. 2 during charging;
fig. 4 is a schematic diagram of connection of the battery system in fig. 2 at the time of voltage equalization;
fig. 5 is a schematic connection diagram of the battery system in fig. 2 in a pre-charging stage.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of thoroughly and completely disclosing the present invention and fully conveying the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
It should be understood that an electric passenger vehicle is provided with two sets of dc battery clusters; the two groups of direct current battery clusters are power storage batteries, namely direct current energy storage power supplies of the electric passenger car.
It should be understood that each set of dc battery cluster herein may include a plurality of single batteries, and the single batteries are connected in series and in parallel to form a predetermined rated power, an operating voltage and an operating current. And the two groups of direct current battery clusters have the same preset rated power, working voltage and working current.
The electric passenger vehicle is also provided with a Battery Management System (BMS), which manages the charging and discharging processes of the two dc Battery clusters.
The electric passenger car is also matched with a direct current charging gun. One end of the direct current charging gun is used for being connected with the plugging port at the front part of the vehicle cover, and the other end of the direct current charging gun is used for being connected with the charging pile, so that the direct current battery cluster of the electric passenger vehicle is charged.
In a first aspect, as shown in fig. 1 and fig. 2, an electric passenger car battery system according to an embodiment of the present invention includes:
a first set of dc battery clusters 10 serving as a dc energy storage power source;
a second set of dc battery clusters 20 for use as a dc energy storage power source;
a control device 30, which is respectively connected with the first group of DC battery clusters and the second group of DC battery clusters; wherein the content of the first and second substances,
the control device controls the first group of direct current battery clusters and the second group of direct current battery clusters to be connected in series, so that the first group of direct current battery clusters and the second group of direct current battery clusters enter a charging state;
the control device controls the first group of direct current battery clusters and the second group of direct current battery clusters to be connected in parallel, so that the first group of direct current battery clusters and the second group of direct current battery clusters enter a discharging state.
As shown in fig. 3, in the battery system, the control device includes a series relay;
when the two ends of the series relay are respectively connected with a first pole of the first group of direct-current battery clusters and a second pole of the second group of direct-current battery clusters, the first group of direct-current battery clusters and the second group of direct-current battery clusters are in a charging state, and electric energy is obtained through a charging gun;
wherein the content of the first and second substances,
the first pole and the second pole have opposite polarities.
The battery system of this embodiment at first promotes the cable in the charging circuit, the voltage class that copper bar or connector bore, through improving charging voltage, can realize in charging circuit the cable, under the condition that the ability of overflowing of copper bar or connector keeps unchangeable, the twice of the charging power that corresponds when charging power promotes for conventional charging voltage, consequently, charging time can reduce to former charging time's half, thereby effectively shorten the electric vehicle's that leads to because of charging the off-line time, improve the availability factor of electronic passenger car.
On the basis of improving the charging voltage, the overcurrent capacity of cables, copper bars and connectors in the charging circuit can be improved, so that the charging power is further improved, for example, the charging power is improved by more than two times of the original charging power. In this case, the charging time can be reduced to less than half of the original charging time, and the stop time of the electric vehicle due to charging can be further reduced, thereby improving the use efficiency of the electric passenger vehicle.
On the basis of improving the charging voltage, the overcurrent capacity of the cable, the copper bar and the connector in the charging circuit can be reduced, so that the cable, the copper bar and the connector in the charging circuit have smaller sectional areas on the basis of improving or unchanging the charging power; the smaller cross-sectional area can significantly reduce the risk of overheating; the size and the weight of cables, copper bars or connectors in the charge-discharge loop can be reduced, and the economy of the electric passenger car is improved.
As shown in fig. 4, in the battery system,
the control device comprises a first parallel relay, an equalizing resistor and a voltage equalizing relay;
the equalizing resistor is connected with the voltage equalizing relay in series;
connecting the first pole of the first group of DC battery clusters and the first pole of the second group of DC battery clusters at the two ends of the first parallel relay respectively, and
the non-series end of the equalizing resistor is connected with the second pole of the first group of direct current battery clusters, an
When the non-series end of the voltage equalizing relay is connected with the two poles of the second group of direct current battery clusters,
before the voltage between the first group of direct current battery clusters and the second group of direct current battery clusters reaches equilibrium, one of the first group of direct current battery clusters and the second group of direct current battery clusters is in a discharging state, and the other one of the first group of direct current battery clusters and the second group of direct current battery clusters is in a charging state; wherein the content of the first and second substances,
the first pole and the second pole have opposite polarities.
According to the battery system, the voltage difference between the battery clusters is equalized before the batteries are connected in parallel for discharging, and the phenomenon that the instantaneous discharging current is overlarge due to the fact that the voltage difference between the battery clusters is large can be effectively avoided.
In the battery system, the battery pack is provided with a battery pack,
the control device further comprises a second parallel relay;
when the two ends of the first parallel relay are respectively connected with the first pole of the first group of direct current battery clusters and the first pole of the second group of direct current battery clusters, and
when the two ends of the second parallel relay are respectively connected with the second pole of the first group of direct current battery clusters and the second pole of the second group of direct current battery clusters,
the first group of direct current battery clusters and the second group of direct current battery clusters are in a discharging state, and electric energy is provided for a load of the whole vehicle.
The battery system further comprises:
a charging terminal;
the charging terminal is used for being connected with a charging gun; wherein the content of the first and second substances,
the charging voltage is a first voltage value;
the charging current is a first current value.
The battery system further comprises:
a series cable for connecting both ends of the series relay to the first group of dc battery clusters and the second group of dc battery clusters, respectively;
the sectional area of the series cable is matched with the charging current.
The battery system further comprises:
a charging cable for connecting the charging terminal to the first set of DC battery clusters or the second set of DC battery clusters;
the sectional area of the charging cable is matched with the charging current;
the current characteristic of the charging cable is adapted to the charging voltage and the charging current.
The battery system further comprises:
a discharge terminal;
the discharge terminal is used for being connected with the load of the whole vehicle; wherein the content of the first and second substances,
the discharge voltage is a second voltage value;
the discharge current is a second current value.
The battery system further comprises:
the first parallel cable is used for respectively connecting two ends of the first parallel relay to the first group of direct current battery clusters and the second group of direct current battery clusters;
the second parallel cable is used for respectively connecting two ends of the second parallel relay to the first group of direct current battery clusters and the second group of direct current battery clusters;
the sectional area of the first parallel cable or the second parallel cable is matched with the discharge current;
the current characteristics of the first or second parallel cable are adapted to the discharge voltage and the discharge current.
The battery system further comprises:
a discharge cable for connecting the discharge terminal to the first or second set of dc battery clusters;
the cross-sectional area of the discharge cable is adapted to the discharge voltage or the discharge current.
Fig. 2 is a schematic composition diagram of a battery system of an electric passenger vehicle according to another embodiment.
As shown in fig. 3, when the BMS of the electric passenger vehicle detects that the dc charging gun is inserted into the connector port of the front of the vehicle body and establishes a communication connection with the dc charger in the charging post while charging the power storage battery, the BMS first controls the charging relay K3 to close such that the first battery cluster B1 is connected in series with the second battery cluster B2; and then the charging positive relay K5 and the charging negative relay K9 are respectively controlled to be closed, so that the electric energy is transferred to the first battery cluster and the second battery cluster after passing through the direct current charging gun.
It should be understood that when the first battery cluster B1 is connected in series with the second battery cluster B2 and the charging positive relay K5 and the charging negative relay K9 are closed, the BMS communicates with the dc charger and charges according to the charging procedure described in the national standard GBT27930, so that the electric energy is transferred to the first battery cluster and the second battery cluster after passing through the dc charging gun.
It should be understood that the remaining relays (e.g., K1, K2, K4, K6, K7, K8) in the battery system 100 are all in an open state when charged.
Specifically, at the time of charging, the battery system 100 is connected to a dc charging gun through a charging positive terminal C1 and a charging negative terminal C2. During charging, the charging circuit comprises 3 circuits which are respectively as follows:
a first charging line connecting the positive electrode of the first battery cluster B1 to a charging positive electrode terminal C1;
a second charging line connecting the negative electrode of the second battery cluster B2 to the charging negative electrode terminal C2;
and a third charging line connecting the cathode of the first battery cluster B1 and the anode of the second battery cluster B2. Wherein a series relay K3 is disposed in the third charging line; the charging positive relay K5 is arranged in the first charging circuit; charging negative relay K9 is provided in the second charging line.
Specifically, when the battery system is charged, the first battery cluster is connected with the second battery cluster, and the charging voltage is twice of the conventional charging voltage. For example, when the operating voltage of the single set of dc battery clusters is 400V, the charging voltage of the first battery cluster connected in series with the second battery cluster is 800V, i.e., the charging voltage of the battery system of this embodiment is twice the conventional charging voltage.
The battery system of this embodiment at first promotes the cable in the charging circuit, the voltage class that copper bar or connector bore, through improving charging voltage, can realize in charging circuit the cable, under the condition that the ability of overflowing of copper bar or connector keeps unchangeable, the twice of the charging power that corresponds when charging power promotes for conventional charging voltage, consequently, charging time can reduce to former charging time's half, thereby effectively shorten the electric vehicle's that leads to because of charging the off-line time, improve the availability factor of electronic passenger car.
On the basis of improving the charging voltage, the overcurrent capacity of cables, copper bars and connectors in the charging circuit can be improved, so that the charging power is further improved, for example, the charging power is improved by more than two times of the original charging power. In this case, the charging time can be reduced to less than half of the original charging time, and the stop time of the electric vehicle due to charging can be further reduced, thereby improving the use efficiency of the electric passenger vehicle.
On the basis of improving the charging voltage, the overcurrent capacity of the cable, the copper bar and the connector in the charging circuit can be reduced, so that the cable, the copper bar and the connector in the charging circuit have smaller sectional areas on the basis of improving or unchanging the charging power; the smaller cross-sectional area can significantly reduce the risk of overheating; the size and the weight of cables, copper bars or connectors in the charge-discharge loop can be reduced, and the economy of the electric passenger car is improved.
When the electric passenger vehicle runs, the battery system needs to be controlled to discharge through the BMS.
Specifically, during discharging, the battery system sequentially comprises a voltage equalization stage, a pre-charging stage and a discharging stage.
As shown in fig. 4, when the BMS of the electric passenger vehicle detects that it is necessary to control the discharge of the battery cluster, the BMS first determines whether the series relay K3, the positive charge relay K5, and the negative charge relay K9 are in an off state; if not, the relays K3, K5 and K9 are controlled to be disconnected respectively; after confirming that all of K3, K5, and K9 are in the open state, the BMS controls the first parallel relay K4 to be closed first, and then controls the voltage equalizing relay K1 to be closed.
At this time, the first battery cluster B1, the second battery cluster B2 and the balancing resistor R1 form a closed loop for balancing a voltage difference between the two sets of dc battery clusters.
Specifically, in the voltage equalization stage, the first battery cluster B1, the second battery cluster B2, the equalization resistor R1, the voltage equalization relay K1, and the first parallel relay K4 in the battery system 100 form a voltage equalization loop. In this case, the charging circuit includes the following 2 circuits:
a second parallel line connecting the cathode of the first battery cluster B1 and the cathode of the second battery cluster B2;
a balancing circuit connecting the positive electrode of the first battery cluster B1 and the positive electrode of the second battery cluster B2;
wherein the content of the first and second substances,
the equalizing resistor R1 and the voltage equalizing relay K1 are arranged in an equalizing line;
the first parallel relay K4 is provided in the first parallel line.
According to the battery system, the voltage difference between the battery clusters is equalized before the batteries are connected in parallel for discharging, and the phenomenon that the instantaneous discharging current is overlarge due to the fact that the voltage difference between the battery clusters is large can be effectively avoided.
When the BMS detects that the voltage difference between the battery clusters is small (e.g., 1% of the rated discharge voltage), the BMS controls the second shunt relay K2 to be closed and controls the voltage equalizing relay K1 to be opened, as shown in fig. 5. Then, the BMS controls the discharging negative relay K8 to be closed, and then controls the pre-charging positive relay K6 to be closed, so that the whole vehicle serving as a load is pre-charged.
In the pre-charging stage, the first battery cluster B1 and the second battery cluster B2 are in parallel connection, and the discharging voltage on the discharging circuit corresponds to the charging voltage; when the charging voltage of the single-set direct current battery cluster is 400V, the discharging voltage is also 400V, namely the conventional discharging voltage value.
It should be understood that when the second parallel relay K2 is closed and the first parallel relay K4 is closed, the first battery cluster is connected in parallel with the second battery cluster; and when the discharging negative electrode relay K8 is closed and the pre-charging positive electrode relay K6 is closed, the BMS controls the battery system to discharge to form a pre-charging discharging loop, so that the electric energy is used by a passenger car through the discharging positive electrode terminal D1 and the discharging negative electrode terminal D2.
Specifically, in the precharge stage, the battery system 100 is connected to the electric devices of the passenger vehicle through the discharge positive terminal D1 and the discharge negative terminal D2. In this case, the charging lines include the following 4 lines:
a pre-charge-discharge line connecting the positive electrode of the first battery cluster B1 and the positive electrode of the second battery cluster B2 to the discharge positive terminal D1;
a negative discharge line connecting the negative electrode of the first battery cluster B1 and the negative electrode of the second battery cluster B2 to the discharge negative terminal D2;
a second parallel line connecting the cathode of the first battery cluster B1 and the cathode of the second battery cluster B2;
a first parallel line connecting the positive electrode of the first cell cluster B1 and the positive electrode of the second cell cluster B2;
the pre-charging resistor R2 and the pre-charging positive pole relay K6 are arranged in a pre-charging and discharging line;
the discharging cathode relay K8 is arranged in the cathode discharging circuit;
the first parallel relay K2 is provided in the first parallel line;
a second parallel relay K4 is provided in the second parallel line.
The pre-charging and discharging loop of the embodiment adopts a conventional voltage grade, does not need to change the electrical parameters of the whole loop device, and can obviously reduce the research and development cost.
After the fact that the pre-charging is completed is detected, the BMS controls the discharging positive electrode relay K7 to be closed and controls the pre-charging positive electrode relay K6 to be opened, and therefore the whole power-on process is completed, and the two groups of direct-current battery clusters begin to discharge the whole vehicle serving as the load.
After the power-on process is finished, the two groups of direct current battery clusters are in a parallel connection state, and at the moment, the discharge voltage on the discharge loop corresponds to the charging voltage; when the charging voltage of the single-set direct current battery cluster is 400V, the discharging voltage is also 400V, namely the conventional discharging voltage value.
It should be understood that when the second parallel relay K2 is closed and the first parallel relay K4 is closed, the first battery cluster is connected in parallel with the second battery cluster; and when the discharging cathode relay K8 is closed and the discharging anode relay K7 is closed, the BMS controls the battery system to discharge to form a normal discharging loop, so that the electric energy is used by the passenger car through the discharging anode terminal D1 and the discharging cathode terminal D2.
Specifically, at this stage of discharge, the battery system 100 is connected to the electric devices of the passenger vehicle through the discharge positive electrode terminal D1 and the discharge positive electrode terminal D2. In this case, the charging lines include the following 4 lines:
a positive discharge line connecting the positive electrode of the first cell cluster B1 and the positive electrode of the second cell cluster B2 to the discharge positive terminal D1;
a negative discharge line connecting the negative electrode of the first battery cluster B1 and the negative electrode of the second battery cluster B2 to the discharge negative terminal D2;
a second parallel line connecting the cathode of the first battery cluster B1 and the cathode of the second battery cluster B2;
a first parallel line connecting the positive electrode of the first cell cluster B1 and the positive electrode of the second cell cluster B2;
the discharging positive electrode relay K7 is arranged in the positive electrode discharging circuit;
the discharging cathode relay K8 is arranged in the cathode discharging circuit;
the first parallel relay K2 is provided in the first parallel line;
a second parallel relay K4 is provided in the second parallel line.
The normal state discharge loop of the embodiment adopts the conventional voltage level, does not need to change the electrical parameters of the whole loop device, and can obviously reduce the research and development cost.
Preferably, in order to ensure the use safety and reliability, in the battery system 100, the series relay K3 and the second parallel relay K2 are in an interlocking relationship; the series relay K3 is in an interlocking relationship with the first parallel relay K4, i.e., K3 and K2 cannot be closed at the same time, and K3 and K4 cannot be closed at the same time.
It should be understood that fuse F1 may also be provided in the battery system.
The invention has been described above by reference to a few embodiments. However, as is known to a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (10)
1. An electric passenger vehicle battery system, comprising:
the control device is respectively connected with the first group of direct current battery clusters and the second group of direct current battery clusters; wherein the content of the first and second substances,
the control device controls the first group of direct current battery clusters and the second group of direct current battery clusters to be connected in series, so that the first group of direct current battery clusters and the second group of direct current battery clusters enter a charging state;
the control device controls the first group of direct current battery clusters and the second group of direct current battery clusters to be connected in parallel, so that the first group of direct current battery clusters and the second group of direct current battery clusters enter a discharging state;
the control device comprises a first parallel relay, an equalizing resistor and a voltage equalizing relay;
the equalizing resistor is connected with the voltage equalizing relay in series;
connecting the first pole of the first group of DC battery clusters and the first pole of the second group of DC battery clusters at the two ends of the first parallel relay respectively, and
the non-series end of the equalizing resistor is connected with the second pole of the first group of direct current battery clusters, an
When the non-series end of the voltage equalizing relay is connected with the second pole of the second group of direct current battery clusters,
before the voltage between the first group of direct current battery clusters and the second group of direct current battery clusters reaches equilibrium, one of the first group of direct current battery clusters and the second group of direct current battery clusters is in a discharging state, and the other one of the first group of direct current battery clusters and the second group of direct current battery clusters is in a charging state;
wherein the content of the first and second substances,
the first pole and the second pole have opposite polarities.
2. The electric passenger vehicle battery system of claim 1,
the control device comprises a series relay;
when the two ends of the series relay are respectively connected with a first pole of the first group of direct-current battery clusters and a second pole of the second group of direct-current battery clusters, the first group of direct-current battery clusters and the second group of direct-current battery clusters are in a charging state, and electric energy is obtained through a charging gun;
wherein the content of the first and second substances,
the first pole and the second pole have opposite polarities.
3. The electric passenger vehicle battery system of claim 1,
the control device further comprises a second parallel relay;
when the two ends of the first parallel relay are respectively connected with the first pole of the first group of direct current battery clusters and the first pole of the second group of direct current battery clusters, and
when the two ends of the second parallel relay are respectively connected with the second pole of the first group of direct current battery clusters and the second pole of the second group of direct current battery clusters,
the first group of direct current battery clusters and the second group of direct current battery clusters are in a discharging state, and electric energy is provided for a load of the whole vehicle.
4. The electric passenger vehicle battery system of claim 2, further comprising:
a charging terminal;
the charging terminal is used for being connected with a charging gun; wherein the content of the first and second substances,
when the first group of direct current battery clusters and the second group of direct current battery clusters are in a charging state,
the charging voltage applied between the positive electrode and the negative electrode of the first group of direct current battery clusters or the second group of direct current battery clusters is a first voltage value;
the charging current flowing through the charging terminal is a first current value.
5. The electric passenger vehicle battery system of claim 4, further comprising:
a series cable for connecting both ends of the series relay to the first group of dc battery clusters and the second group of dc battery clusters, respectively;
the sectional area of the series cable is matched with the charging current.
6. The electric passenger vehicle battery system of claim 4, further comprising:
a charging cable for connecting the charging terminal to the first set of DC battery clusters or the second set of DC battery clusters;
the sectional area of the charging cable is matched with the charging current.
7. The electric passenger vehicle battery system of claim 3, further comprising:
a discharge terminal;
the discharge terminal is used for being connected with the load of the whole vehicle; wherein the content of the first and second substances,
when the first group of direct current battery clusters and the second group of direct current battery clusters are in a discharging state,
the discharge voltage represented between the positive electrode and the negative electrode of the first group of direct current battery clusters or the second group of direct current battery clusters is a second voltage value;
the discharge current flowing through the discharge terminal is a second current value.
8. The electric passenger vehicle battery system of claim 7, further comprising:
the first parallel cable is used for respectively connecting two ends of the first parallel relay to the first group of direct current battery clusters and the second group of direct current battery clusters;
the second parallel cable is used for respectively connecting two ends of the second parallel relay to the first group of direct current battery clusters and the second group of direct current battery clusters;
the cross-sectional area of the first parallel cable or the second parallel cable is adapted to the discharge voltage or the discharge current.
9. The electric passenger vehicle battery system of claim 8, further comprising:
a discharge cable for connecting the discharge terminal to the first or second set of dc battery clusters;
the sectional area of the discharge cable is matched with the discharge current.
10. An electric passenger vehicle, characterized in that the battery system according to any one of claims 1 to 9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920938493.1U CN211335650U (en) | 2019-06-20 | 2019-06-20 | Battery system of electric passenger vehicle and electric passenger vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920938493.1U CN211335650U (en) | 2019-06-20 | 2019-06-20 | Battery system of electric passenger vehicle and electric passenger vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN211335650U true CN211335650U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920938493.1U Active CN211335650U (en) | 2019-06-20 | 2019-06-20 | Battery system of electric passenger vehicle and electric passenger vehicle |
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| Country | Link |
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| CN (1) | CN211335650U (en) |
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