CN217656463U - Vehicle-mounted battery system and vehicle - Google Patents
Vehicle-mounted battery system and vehicle Download PDFInfo
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- CN217656463U CN217656463U CN202221741407.6U CN202221741407U CN217656463U CN 217656463 U CN217656463 U CN 217656463U CN 202221741407 U CN202221741407 U CN 202221741407U CN 217656463 U CN217656463 U CN 217656463U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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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
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Abstract
The utility model discloses a vehicle-mounted battery system and vehicle, vehicle-mounted battery system includes: the power supply comprises a first battery pack, a second battery pack, a junction box, a distribution box and a control unit; the first battery pack and the second battery pack are arranged outside the junction box and connected with the junction box; a battery pack series-parallel connection switching unit is arranged in the junction box and used for connecting the first battery pack and the second battery pack in series or in parallel; the distribution box is connected with the first battery pack and the second battery pack through the junction box, and is also used for being connected with a charging device and an electric load; a charging relay and a discharging relay are arranged in the distribution box, the charging relay is used for communicating the first battery pack, the second battery pack and the charging device, and the discharging relay is used for communicating the first battery pack, the second battery pack and the power load; the control unit is configured to control the battery pack series-parallel connection switching unit, the charging relay and the discharging relay.
Description
Technical Field
The embodiment of the utility model provides a relate to vehicle engineering technique, especially relate to an on-vehicle battery system and vehicle.
Background
With the popularization and application of the new energy commercial vehicle market, the new energy commercial vehicle is generally formed by combining a plurality of power battery packs in series, parallel or series-parallel connection due to the requirements of load capacity and endurance mileage, so as to meet the voltage and power requirements. Along with the increase of the battery capacity of the power battery system, the charging time of the power battery is also increased, and 1000V high-voltage platform charging equipment continuously appears on the market so as to realize high-power charging to shorten the charging time.
At present, high-voltage parts of new energy commercial vehicles which need a power battery system to provide electric energy are all voltage platforms of 500V. Therefore, in order to realize high-power charging of a 1000V high-voltage platform, the charging voltage during charging needs to be increased, and meanwhile, in order to give consideration to a 500V voltage platform for discharging of a new energy commercial vehicle, a scheme of redeveloping a power assembly to match a step-down DCDC needs to be developed, so that the redeveloping of the power assembly is high in cost and long in development period.
SUMMERY OF THE UTILITY MODEL
The utility model provides an on-vehicle battery system and vehicle to reach and make on-vehicle battery system upwards support high voltage charging platform's purpose under the prerequisite that does not change the battery package structure.
In a first aspect, an embodiment of the present invention provides an on-vehicle battery system, including:
the battery pack control system comprises a first battery pack, a second battery pack, a junction box, a distribution box and a control unit, wherein the first battery pack and the second battery pack have the same design parameters;
the first battery pack and the second battery pack are arranged outside the junction box and are connected with the junction box;
a battery pack series-parallel connection switching unit is configured in the junction box and used for connecting the first battery pack and the second battery pack in series or in parallel;
the distribution box is connected with the first battery pack and the second battery pack through the junction box, and is also used for being connected with a charging device and an electric load;
a charging relay and a discharging relay are arranged in the distribution box, the charging relay is used for communicating the first battery pack, the second battery pack and a charging device, and the discharging relay is used for communicating the first battery pack, the second battery pack and an electric load;
the control unit is configured to control the battery pack series-parallel connection switching unit, the charging relay and the discharging relay.
Optionally, the junction box is configured with a first battery positive interface, a first battery negative interface, a second battery positive interface, a second battery negative interface, a first positive interface, a second positive interface, a first negative interface, and a second negative interface;
the positive electrode and the negative electrode of the first battery pack are respectively connected with the first battery positive interface and the first battery negative interface;
the positive electrode and the negative electrode of the second battery pack are respectively connected with the positive interface and the negative interface of the second battery;
the junction box is connected with the distribution box through the first positive interface, the second positive interface, the first negative interface and the second negative interface.
Optionally, the battery pack series-parallel connection switching unit includes a first relay, a second relay, and a third relay;
inside the junction box, the first positive interface is connected with the first battery positive interface, the second positive interface is connected with the second battery positive interface, the first negative interface is connected with the first battery negative interface, and the second negative interface is connected with the second battery negative interface;
inside the junction box, the first relay, the second relay and the third relay are also connected in series between the second positive interface and the first negative interface.
Optionally, the distribution box is configured with a first interface, a second interface, a third interface, a fourth interface, a charging positive interface, a charging negative interface, a discharging positive interface, and a discharging negative interface;
the first interface and the second interface are connected with the first positive interface and the second positive interface, and the third interface and the fourth interface are connected with the first negative interface and the second negative interface.
Optionally, the charging relay includes a charging positive relay and a charging negative relay;
inside the distribution box, at least one charging positive relay is configured among the first interface, the second interface and the charging positive interface, and at least one charging negative relay is configured among the third interface, the fourth interface, the charging negative interface and the discharging negative interface.
Optionally, the distribution box is configured with a first charging positive relay, a second charging positive relay, a first charging negative relay, a second charging negative relay, and a discharging negative relay.
Optionally, the rated voltage of the first battery pack and the rated voltage of the second battery pack are 400V to 500V.
Optionally, the control unit adopts a battery management unit.
Optionally, the power distribution box further comprises a transformer unit, and the power distribution box is connected with the electric load through the transformer unit.
In a second aspect, the embodiment of the utility model provides a vehicle is still provided, include the embodiment of the utility model provides an on-vehicle battery system.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a vehicle-mounted battery system, including first group battery, second group battery, terminal box, block terminal and the control unit, wherein, dispose the switching unit that the group battery is connected in series and parallel in the terminal box, through the switching unit that the group battery is connected in series and parallel, when charging device's charging voltage is twice of first group battery or second group battery rated voltage, can switch first group battery, second group battery from the parallel mode to the series mode to make vehicle-mounted battery system can be compatible high voltage charging platform upwards; in addition, through at first group battery and the independent terminal box of second group battery external configuration, need not to change the project organization of the battery package that contains the group battery, development time and cost can be saved without changing to original battery package scheme, simultaneously, need not play the battery package when maintenance or change terminal box, the maintenance of terminal box is changed more conveniently.
Drawings
FIG. 1 is a schematic structural view of a vehicle-mounted battery system in the embodiment;
FIG. 2 is a schematic view of a junction box structure in an embodiment;
fig. 3 is a schematic diagram of a distribution box structure in an embodiment;
fig. 4 is a schematic structural diagram of another vehicle-mounted battery system in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.
Example one
Fig. 1 is a schematic structural view of a vehicle-mounted battery system in an embodiment, and referring to fig. 1, the vehicle-mounted battery system includes: a first battery pack 1, a second battery pack 2, a junction box 3, a distribution box 4, and a control unit 5.
Referring to fig. 1, a first battery pack 1 and a second battery pack 2 are disposed outside a junction box 3 and connected to the junction box 3;
the distribution box 4 is connected with the first battery pack 1 and the second battery pack 2 through the junction box 3, and the distribution box 4 is also used for being connected with a charging device and an electric load.
In this embodiment, the distribution box 4 is internally provided with a charging relay and a discharging relay, the charging relay is used for communicating the first battery pack 1, the second battery pack 2 and the charging device, and the discharging relay is used for communicating the first battery pack 1, the second battery pack 2 and the electrical load.
In this embodiment, a battery pack series-parallel switching unit is configured inside the junction box 3, and the battery pack series-parallel switching unit is used for connecting the first battery pack 1 and the second battery pack 2 in series or in parallel.
In this embodiment, in order to enable the first battery pack 1 and the second battery pack 2 to be normally connected in parallel for use, the design parameters of the first battery pack 1 and the second battery pack 2 are the same.
Illustratively, in this embodiment, the rated voltage of the first battery pack 1 and the rated voltage of the second battery pack 2 may be set to 400V to 500V, and accordingly, the charging voltage of the charging device may be 400V to 1000V.
In this embodiment, the control unit 5 is configured to control the battery pack series-parallel switching unit, the charging relay, and the discharging relay, and specifically, the working process of the vehicle-mounted battery system includes:
when the vehicle does not access the charging device, the first battery pack 1 and the second battery pack 2 are connected in parallel by controlling the battery pack series-parallel connection switching unit, the control unit 5 controls the discharging relay to be closed and the charging relay to be opened, and at the moment, the first battery pack 1 and the second battery pack 2 which are connected in parallel discharge to the electric load;
when a vehicle is connected into the charging device, if the charging voltage is low voltage (400V-500V), the first battery pack 1 and the second battery pack 2 are connected in parallel by controlling the battery pack series-parallel connection switching unit, the control unit 5 controls the discharging relay to be opened and the charging relay to be closed, and at the moment, the charging device charges the first battery pack 1 and the second battery pack 2 which are connected in parallel;
when the vehicle is connected to the charging device, if the charging voltage is high (800V to 1000V), the first battery pack 1 and the second battery pack 2 are connected in series by controlling the battery pack series-parallel switching unit, and the control unit 5 controls the discharging relay to be opened and the charging relay to be closed, at this time, the charging device charges the first battery pack 1 and the second battery pack 2 which are connected in series.
Illustratively, in the present embodiment, the control unit 5 is connected to the distribution box 4, and the control unit 5 may be configured to determine whether the charging voltage is a voltage or a high voltage.
For example, in the present embodiment, the specific form of the control unit is not particularly limited, and for example, the control unit is a Battery Management System (BMS).
The embodiment provides a vehicle-mounted battery system, which comprises a first battery pack, a second battery pack, a junction box, a distribution box and a control unit, wherein a battery pack serial-parallel switching unit is configured in the junction box, and when the charging voltage of a charging device is twice of the rated voltage of the first battery pack or the second battery pack, the first battery pack and the second battery pack can be switched from a parallel mode to a series mode through the battery pack serial-parallel switching unit, so that the vehicle-mounted battery system can be upwards compatible with a high-voltage charging platform;
in addition, independent junction boxes are arranged outside the first battery pack and the second battery pack, the design structure of a battery pack containing the battery packs does not need to be changed, the original battery pack scheme does not need to be changed, development time and cost can be saved, meanwhile, the battery pack does not need to be opened when the junction boxes are maintained or replaced, and the junction boxes are more convenient to maintain and replace;
in addition, a distribution box which is relatively independent from the junction box is configured, a charging relay and a discharging relay are configured in the distribution box, and the charging relay and the discharging relay are configured in the distribution box which is specially used for charging and discharging distribution, so that the structural division of the vehicle-mounted battery system can be more definite, and the maintenance difficulty is reduced.
Fig. 2 is a schematic structural diagram of the junction box in the embodiment, and referring to fig. 2, as an implementation scheme, the junction box is configured with a first battery positive interface 12, a first battery negative interface 11, a second battery positive interface 14, a second battery negative interface 13, a first positive interface 15, a second positive interface 16, a first negative interface 17, and a second negative interface 18.
With reference to fig. 1 and fig. 2, in this scheme, the positive electrode and the negative electrode of the first battery pack 1 are respectively connected to the first battery positive interface 12 and the first battery negative interface 11, and the positive electrode and the negative electrode of the second battery pack 2 are respectively connected to the second battery positive interface 14 and the second battery negative interface 13;
inside the junction box, a first positive interface 15 is connected with a first battery positive interface 12, a second positive interface 16 is connected with a second battery positive interface 14, a first negative interface 17 is connected with a first battery negative interface 11, and a second negative interface 18 is connected with a second battery negative interface 13;
the junction box 3 is connected to the distribution box 4 via a first positive interface 15, a second positive interface 16, a first negative interface 17 and a second negative interface 18.
Illustratively, based on the connection relationship between the junction box and the distribution box and the connection relationship corresponding to the first positive interface, the first battery positive interface, the second battery positive interface, the first negative interface, the first battery negative interface, the second negative interface and the second battery negative interface inside the junction box, when the first battery pack and the second battery pack are connected in parallel, the first battery pack and the second battery pack can be charged by the charging device respectively.
Referring to fig. 2, as an embodiment, the battery pack series-parallel switching unit includes a first relay 101, a second relay 102, and a third relay 103.
Inside the junction box, a first relay 101, a second relay 102, and a third relay 103 are connected in series between the second positive interface 16 and the first negative interface 17.
For example, in the scheme, when the first battery pack and the second battery pack need to be connected in parallel, the control unit controls the first relay 101 and the third relay 103 to be closed, and controls the second relay 102 to be opened;
when the first battery pack and the second battery pack are required to be connected in series, the control unit controls the first relay 101 and the third relay 103 to be opened and controls the second relay 102 to be closed.
Fig. 3 is a schematic structural diagram of a distribution box in an embodiment, and referring to fig. 3, on the basis of the scheme shown in fig. 2, the distribution box is configured with a first interface 21, a second interface 22, a third interface 23, a fourth interface 24, a charging positive interface 26, a charging negative interface 28, a discharging positive interface 25, and a discharging negative interface 27.
With reference to fig. 2 and 3, the first interface 21 and the second interface 22 are respectively connected to the first positive interface 15 and the second positive interface 16, and the third interface 23 and the fourth interface 24 are respectively connected to the first negative interface 17 and the second negative interface 18;
the charging positive interface 26 and the charging negative interface 28 are used for connecting with a charging device, and the discharging positive interface 25 and the discharging negative interface 27 are used for connecting with an electric load.
In the present exemplary embodiment, at least one charging positive relay is configured inside the distribution box between the first interface 21, the second interface 22, and the charging positive interface 26;
at least one charging negative relay is arranged between the third interface 23 and the fourth interface 24 and between the charging negative interface 28 and the discharging negative interface 27.
Illustratively, the number of the charging positive relays and the charging negative relays can be set according to requirements, and referring to fig. 3, as an embodiment, the distribution box 4 is configured with a first charging positive relay 201, a second charging positive relay 202, a first charging negative relay 204, a second charging negative relay 205, and a discharging negative relay 203.
The charging positive interface 26 is connected with the first interface 21 and the second interface 22 through a first charging positive relay 201 and a second charging positive relay 202;
the charging negative interface 28 is connected with the third interface 23 and the fourth interface 24 through a first charging negative relay 204 and a second charging negative relay 205;
the discharging negative interface 27 is connected to the third interface 23 and the fourth interface 24 via a discharging negative relay 203.
Illustratively, when the battery pack needs to be controlled to discharge, the control unit controls the first charging positive relay 201, the second charging positive relay 202, the first charging negative relay 204 and the second charging negative relay 205 to be opened and controls the discharging negative relay 203 to be closed;
when the battery pack needs to be controlled to be charged, the control unit controls the first charging positive relay 201, the second charging positive relay 202, the first charging negative relay 204 and the second charging negative relay 205 to be closed, and controls the discharging negative relay 203 to be opened.
For example, when the battery pack is charged, the first charging positive relay 201 and the second charging positive relay 202 are connected in parallel for use, and the first charging negative relay 204 and the second charging negative relay 205 are connected in parallel for use, so that the relays can be prevented from being damaged when the charging current is large.
For example, referring to fig. 1 to 3, when the first battery pack 1 and the second battery pack 2 are connected in parallel, based on the first charging positive relay 201 and the second charging positive relay 202, the first charging negative relay 204 and the second charging negative relay 205 may implement independent control for the charging loop of the first battery pack 1 and independent control for the charging loop of the second battery pack 2.
For example, when the first battery pack 1 and the second battery pack 2 are connected in parallel, if the first charging positive relay 201 or the first charging negative relay 204 is controlled to be turned off, the charging loop of the first battery pack 1 is turned off;
if the second charge positive relay 202 or the second charge negative relay 205 is controlled to be off, the charge circuit of the second battery pack 2 is turned off.
For example, in one possible embodiment, a first MSD switch may be further configured between the first charge positive relay 201 and the first interface 21; a second MSD switch may also be configured between the second charge plus relay 202 and the second interface 22; a third MSD switch can be further configured between the first charge negative relay 204 and the third interface 23; a fourth MSD switch may also be configured between the second charge negative relay 205 and the fourth interface 24.
In an exemplary embodiment, the MSD switch may be manually turned off during vehicle maintenance, so as to isolate the high-voltage system and ensure the safety during maintenance.
Fig. 4 is a schematic structural diagram of another vehicle-mounted battery system in an embodiment, and referring to fig. 4, on the basis of the scheme shown in fig. 1, the vehicle-mounted battery system further includes a transformer unit 6, and the distribution box is connected with an electric load through the transformer unit 6.
In the scheme, the transformer unit is mainly used for voltage reduction, and reduces the high voltage (400-500V) output by the battery pack to the working voltage (12-48V) of the low-voltage electric load.
Example two
The present embodiment provides a vehicle, including any one of the vehicle-mounted battery systems described in the first embodiment, wherein beneficial effects of the vehicle are the same as those of the corresponding solutions described in the first embodiment, and are not described herein again.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. An in-vehicle battery system, characterized by comprising:
the battery pack control system comprises a first battery pack, a second battery pack, a junction box, a distribution box and a control unit, wherein the first battery pack and the second battery pack have the same design parameters;
the first battery pack and the second battery pack are arranged outside the junction box and are connected with the junction box;
a battery pack series-parallel connection switching unit is configured in the junction box and used for connecting the first battery pack and the second battery pack in series or in parallel;
the distribution box is connected with the first battery pack and the second battery pack through the junction box, and is also used for being connected with a charging device and an electric load;
a charging relay and a discharging relay are arranged in the distribution box, the charging relay is used for communicating the first battery pack, the second battery pack and a charging device, and the discharging relay is used for communicating the first battery pack, the second battery pack and an electric load;
the control unit is configured to control the battery pack series-parallel connection switching unit, the charging relay and the discharging relay.
2. The vehicle-mounted battery system of claim 1, wherein the junction box is configured with a first battery positive interface, a first battery negative interface, a second battery positive interface, a second battery negative interface, a first positive interface, a second positive interface, a first negative interface, a second negative interface;
the positive electrode and the negative electrode of the first battery pack are respectively connected with the first battery positive interface and the first battery negative interface;
the positive electrode and the negative electrode of the second battery pack are respectively connected with the positive interface and the negative interface of the second battery;
the junction box is connected with the distribution box through the first positive interface, the second positive interface, the first negative interface and the second negative interface;
inside the junction box, the first positive interface is connected with the first battery positive interface, the second positive interface is connected with the second battery positive interface, the first negative interface is connected with the first battery negative interface, and the second negative interface is connected with the second battery negative interface.
3. The vehicle-mounted battery system according to claim 2, wherein the battery pack series-parallel switching unit includes a first relay, a second relay, and a third relay;
inside the junction box, the first relay, the second relay and the third relay are connected in series between the second positive interface and the first negative interface.
4. The vehicle-mounted battery system according to claim 2, wherein the distribution box is configured with a first interface, a second interface, a third interface, a fourth interface, a charging positive interface, a charging negative interface, a discharging positive interface, a discharging negative interface;
the first interface and the second interface are connected with the first positive interface and the second positive interface, and the third interface and the fourth interface are connected with the first negative interface and the second negative interface.
5. The in-vehicle battery system according to claim 4, wherein the charging relay includes a charging positive relay, a charging negative relay;
inside the distribution box, at least one charging positive relay is configured among the first interface, the second interface and the charging positive interface, and at least one charging negative relay is configured among the third interface, the fourth interface and the charging negative interface and the discharging negative interface.
6. The on-vehicle battery system according to claim 5, wherein the distribution box is provided with a first charging positive relay, a second charging positive relay, a first charging negative relay, a second charging negative relay, and a discharging negative relay.
7. The vehicle-mounted battery system according to claim 1, wherein the rated voltage of the first battery pack and the rated voltage of the second battery pack are 400V to 500V.
8. The vehicle-mounted battery system according to claim 1, wherein the control unit employs a battery management unit.
9. The on-vehicle battery system according to claim 1, further comprising a transformer unit, the distribution box being connected with the electric load through the transformer unit.
10. A vehicle characterized by comprising the on-vehicle battery system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221741407.6U CN217656463U (en) | 2022-07-05 | 2022-07-05 | Vehicle-mounted battery system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221741407.6U CN217656463U (en) | 2022-07-05 | 2022-07-05 | Vehicle-mounted battery system and vehicle |
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| Publication Number | Publication Date |
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| CN217656463U true CN217656463U (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221741407.6U Active CN217656463U (en) | 2022-07-05 | 2022-07-05 | Vehicle-mounted battery system and vehicle |
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| CN (1) | CN217656463U (en) |
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- 2022-07-05 CN CN202221741407.6U patent/CN217656463U/en active Active
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