CN209852115U - Battery system for electric automobile, over-discharge protection device and automobile - Google Patents
Battery system for electric automobile, over-discharge protection device and automobile Download PDFInfo
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- CN209852115U CN209852115U CN201920611263.4U CN201920611263U CN209852115U CN 209852115 U CN209852115 U CN 209852115U CN 201920611263 U CN201920611263 U CN 201920611263U CN 209852115 U CN209852115 U CN 209852115U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model relates to a battery system, overdischarge protection device and car that electric automobile used. The method mainly comprises the following steps: the battery pack comprises a BMS module, a DC/DC module, a battery pack, a power-on switch and an over-discharge protection switch, wherein the positive terminal of the BMS module is connected with the positive output end of the DC/DC module, the positive input end of the DC/DC module is connected with the power-on switch, the power-on switch is connected with the over-discharge protection switch, the over-discharge protection switch is connected with the positive terminal of the battery pack, and the over-discharge protection switch is controlled by the BMS module. In the system, due to the fact that the over-discharge protection switch is arranged, when the BMS module detects that the single body reaches 2.3V at the lowest in the discharge mode, the BMS module sends a signal to control the over-discharge protection switch to be switched off, namely all loads at the rear end of the battery pack are powered off and stop working, at the moment, the whole system cannot be powered on again through the power-on switch, and the damage caused by over-discharge of the battery system due to misoperation is effectively prevented.
Description
Technical Field
The utility model relates to a battery field especially relates to a battery system, overdischarge protection device and car that electric automobile used.
Background
The conventional battery system for an electric vehicle has problems in that: the group battery comprises a plurality of battery cells, when monomer minimum voltage is 2.4V, triggers the low protection of monomer voltage, and the BMS module cuts off the relay that discharges, if forget to cut off power on switch, then DC/DC module and BMS module are in operating condition. This continuously consumes the electricity of the battery pack until the battery system is damaged due to the over-discharge.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a battery system for an electric vehicle, which is directed to the problem that the conventional battery system is easily damaged by over-discharge.
A battery system for an electric vehicle, comprising:
the battery pack comprises a BMS module, a DC/DC module, a battery pack, a power-on switch and an over-discharge protection switch, wherein the positive terminal of the BMS module is connected with the positive output end of the DC/DC module, the positive input end of the DC/DC module is connected with the power-on switch, the power-on switch is connected with the over-discharge protection switch, the over-discharge protection switch is connected with the positive terminal of the battery pack, and the over-discharge protection switch is controlled by the BMS module.
In the system, due to the fact that the over-discharge protection switch is arranged, when the BMS module detects that the single body reaches 2.3V at the lowest in the discharge mode, the BMS module sends a signal to control the over-discharge protection switch to be switched off, namely all loads at the rear end of the battery pack are powered off and stop working, at the moment, the whole system cannot be powered on again through the power-on switch, and the damage caused by over-discharge of the battery system due to misoperation is effectively prevented.
In one embodiment, the over-discharge protection switch is a magnetic latching relay.
In one embodiment, the negative terminal of the BMS module is connected to the negative output terminal of the DC/DC module, and the negative input terminal of the DC/DC module is connected to the negative terminal of the battery pack.
In one embodiment, the negative end of the battery pack is further connected in series with a hall sensor and a negative discharging relay in sequence, the first end of the negative discharging relay and the hall sensor are connected with a negative charging terminal in common, and the second end of the negative discharging relay is connected with a negative discharging terminal.
In one embodiment, the positive electrode of the battery pack is connected to one end of a fuse, and the other end of the fuse is connected in parallel to a positive charging relay connected to a positive charging terminal and a positive discharging relay connected to a positive discharging terminal.
A battery over-discharge protection device for an electric vehicle, comprising: the intelligent power supply comprises a BMS module, a DC/DC module, a power-on switch and an over-discharge protection switch, wherein the positive terminal of the BMS module is connected with the positive output end of the DC/DC module, the positive input end of the DC/DC module is connected with the power-on switch, the power-on switch is connected with the over-discharge protection switch, and the over-discharge protection switch is controlled by the BMS module.
An electric automobile comprises the battery system for the electric automobile.
Drawings
Fig. 1 is a schematic diagram of a battery system for an electric vehicle according to an embodiment of the present invention.
Wherein:
110. BMS module 120, DC/DC module 130, power-on switch
140. Over-discharge protection switch 150, battery pack 160 and Hall sensor
171. Negative electrode discharging relay 172 and positive electrode charging relay
173. Positive electrode discharge relay 180 and fuse
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured 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.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an embodiment of the present invention provides a battery system for an electric vehicle, including: the battery pack comprises a BMS module 110, a DC/DC module 120, a battery pack 150, an upper power switch 130 and an over-discharge protection switch 140, wherein the positive terminal of the BMS module 110 is connected with the positive terminal of the DC/DC module 120, the positive terminal of the DC/DC module 120 is connected with the upper power switch 130, the upper power switch 130 is connected with the over-discharge protection switch 140, the over-discharge protection switch 140 is connected with the positive terminal of the battery pack 150, and the over-discharge protection switch 140 is controlled by the BMS module 110.
In the system, due to the over-discharge protection switch 140, when the BMS module 110 detects that the cell reaches 2.3V at the lowest in the discharge mode, the BMS module 110 sends a signal to control the over-discharge protection switch 140 to be turned off, that is, all loads at the rear end of the battery pack 150 are powered off and stop working, at this time, the whole system cannot be powered on again through the power-on switch 130, and the damage of the battery system due to over-discharge caused by misoperation is also effectively prevented. After the system activates the BMS module 110 through charging, in a charging mode, after the minimum monomer reaches 2.35V, the BMS module 110 sends a pulse signal to control the over-discharge protection switch 140 to be closed, and after the maximum monomer reaches 2.4V, the power-on switch 130 is closed, so that the system can normally work, and the purpose of protecting the over-discharge of the battery system is achieved.
In this embodiment, the over-discharge protection switch 140 is a magnetic latching relay. When the BMS module 110 detects that the single body is at least 2.3V in the discharging mode, the BMS module 110 sends a pulse signal to control the magnetic latching relay to be switched off, namely all loads at the rear end of the battery pack 150 are powered off and stop working, at the moment, the whole system cannot be powered on again through the power-on switch 130, and the damage caused by over-discharge of the battery system due to misoperation is also effectively prevented.
It is understood that the over-discharge protection switch 140 described above may be other types of elements as well. As long as the opening and closing function can be implemented under the control of the BMS module 110.
In this embodiment, the negative terminal of the BMS module 110 is connected to the negative output terminal of the DC/DC module 120, and the negative input terminal of the DC/DC module 120 is connected to the negative terminal of the battery pack 150.
In this embodiment, the negative terminal of the battery pack 150 is further connected in series with a hall sensor 160 and a negative discharging relay 171 in sequence, the hall sensor 160 is used for detecting current, the first terminal of the negative discharging relay 171 and the hall sensor 160 are connected to a negative charging terminal, and the second terminal of the negative discharging relay 171 is connected to a negative discharging terminal.
In this embodiment, the positive electrode of the battery pack 150 is connected to one end of the fuse 180, the other end of the fuse 180 is connected in parallel to a positive charging relay 172 and a positive discharging relay 173, the positive charging relay 172 is connected to a positive charging terminal, and the positive discharging relay 173 is connected to a positive discharging terminal.
The embodiment of the utility model provides a battery that electric automobile used is overdischarged protection device still is provided, include: the protection circuit comprises a BMS module 110, a DC/DC module 120, a power-on switch 130 and an over-discharge protection switch 140, wherein the positive terminal of the BMS module 110 is connected with the positive output terminal of the DC/DC module 120, the positive input terminal of the DC/DC module 120 is connected with the power-on switch 130, the power-on switch 130 is connected with the over-discharge protection switch 140, and the over-discharge protection switch 140 is controlled by the BMS module 110.
The embodiment of the utility model provides an electric automobile is still provided, include electric automobile for battery system. The battery system may be used to power a motor controller of an automobile.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. A battery system for an electric vehicle, comprising:
the battery pack comprises a BMS module, a DC/DC module, a battery pack, a power-on switch and an over-discharge protection switch, wherein the positive terminal of the BMS module is connected with the positive output end of the DC/DC module, the positive input end of the DC/DC module is connected with the power-on switch, the power-on switch is connected with the over-discharge protection switch, the over-discharge protection switch is connected with the positive terminal of the battery pack, and the over-discharge protection switch is controlled by the BMS module.
2. The battery system for an electric vehicle according to claim 1, wherein the over-discharge protection switch is a magnetic latching relay.
3. The battery system for the electric vehicle according to claim 1, wherein a negative terminal of the BMS module is connected to a negative output terminal of the DC/DC module, and a negative input terminal of the DC/DC module is connected to a negative terminal of the battery pack.
4. The battery system for the electric vehicle according to claim 1, wherein a hall sensor and a negative discharging relay are further connected in series in sequence at the negative terminal of the battery pack, a negative charging terminal is connected to the hall sensor and a negative discharging terminal is connected to the hall sensor at a first terminal of the negative discharging relay, and a negative discharging terminal is connected to a second terminal of the negative discharging relay.
5. The battery system for an electric vehicle according to claim 1, wherein a positive electrode of the battery pack is connected to one end of a fuse, and a positive charging relay and a positive discharging relay are connected in parallel to the other end of the fuse, the positive charging relay being connected to a positive charging terminal, and the positive discharging relay being connected to a positive discharging terminal.
6. A battery over-discharge protection device for an electric vehicle, comprising: the intelligent power supply comprises a BMS module, a DC/DC module, a power-on switch and an over-discharge protection switch, wherein the positive terminal of the BMS module is connected with the positive output end of the DC/DC module, the positive input end of the DC/DC module is connected with the power-on switch, the power-on switch is connected with the over-discharge protection switch, and the over-discharge protection switch is controlled by the BMS module.
7. An electric vehicle comprising the battery system for an electric vehicle according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611263.4U CN209852115U (en) | 2019-04-30 | 2019-04-30 | Battery system for electric automobile, over-discharge protection device and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611263.4U CN209852115U (en) | 2019-04-30 | 2019-04-30 | Battery system for electric automobile, over-discharge protection device and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209852115U true CN209852115U (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920611263.4U Active CN209852115U (en) | 2019-04-30 | 2019-04-30 | Battery system for electric automobile, over-discharge protection device and automobile |
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| Country | Link |
|---|---|
| CN (1) | CN209852115U (en) |
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2019
- 2019-04-30 CN CN201920611263.4U patent/CN209852115U/en active Active
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