CN117644801A - Intelligent heat-preservation electricity supplementing structure and electricity supplementing method for pure electric vehicle - Google Patents
Intelligent heat-preservation electricity supplementing structure and electricity supplementing method for pure electric vehicle Download PDFInfo
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- CN117644801A CN117644801A CN202311672651.0A CN202311672651A CN117644801A CN 117644801 A CN117644801 A CN 117644801A CN 202311672651 A CN202311672651 A CN 202311672651A CN 117644801 A CN117644801 A CN 117644801A
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- 238000004321 preservation Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001502 supplementing effect Effects 0.000 title claims description 5
- 230000005611 electricity Effects 0.000 title description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 90
- 238000009413 insulation Methods 0.000 claims description 2
- 230000003020 moisturizing effect Effects 0.000 claims 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 11
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 11
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 239000000178 monomer Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The invention relates to the technical field of new energy BMS and power grids, in particular to an intelligent heat-preservation power-supplementing method for a pure electric vehicle, which is characterized in that in the charging process and in the full-charge state, the BMS detects the temperature in real time, the temperature of a battery pack is controlled to be in a proper range by controlling a battery pack heating system and a charging system, and a battery pack heating device comprises a heating film, a heating relay and a heating fuse and is used for heating lithium ion battery monomers or modules in the battery pack, so that the battery works in a proper temperature range, the discharge capacity of the battery is ensured to be in an optimal state, the endurance mileage of the lithium ion battery in winter is prolonged, and the service life of the lithium ion battery is prolonged.
Description
Technical Field
The invention relates to the technical fields of new energy BMS and power grids, in particular to an intelligent heat-preservation power-supplementing structure and a power-supplementing method of a pure electric vehicle.
Background
When new energy automobiles develop normal heat, all large automobile factories are exerting force on the new energy automobiles. The power battery technology as the core of the new energy automobile is certainly important. How to improve the endurance and safety of the power battery is also an important point for research and development. The obvious attenuation of the duration of the winter is a biggest pain point of the new energy automobile, and engineers are also in the full of brains for keeping the duration. Today we say the battery thermal insulation technology which improves one of the low temperature endurance measures in winter.
At present, all power batteries loaded in the new energy automobiles are lithium ion batteries, and the lithium ion batteries are very sensitive to temperature, have a proper charge-discharge temperature range, and are greatly influenced by charge and discharge once the temperature exceeds or falls below the temperature range.
The battery box is generally metal, and low-temperature heat conduction is faster in winter, and the temperature of the battery box which is placed outdoors for one night is reduced to be the same as the temperature outdoors, so that the discharge capacity of the low-temperature battery is reduced, the endurance is greatly reduced, and the problem that needs to be solved is solved by a person in the field to ensure that the battery temperature is suitable in winter.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an intelligent heat-preservation power-supplementing method for a pure electric vehicle, which is characterized in that a BMS detects the temperature in real time, so that the discharge capacity of a battery is kept in an optimal state, the endurance mileage of the lithium ion battery in winter is prolonged, and the service life of the lithium ion battery is prolonged.
The technical proposal is as follows:
the utility model provides a pure electric vehicle intelligence heat preservation and mends electric structure, includes charging system, heating system and battery system, charging system's positive pole passes through the wire and is connected with heating system, charging system's negative pole passes through the wire and is connected with heating system, forms complete closed circuit, battery system and heating system parallel connection.
Preferably, the charging system comprises an OBC charger, a negative electrode lead, a positive electrode lead, a zero line, a fire wire and a ground wire, wherein one side of the OBC charger is connected with the zero line, the fire wire and the ground wire respectively, and the other side of the OBC charger is connected with the heating system through the negative electrode lead and the positive electrode lead respectively.
Preferably, the battery system comprises a shunt, a battery module, a main fuse, a pre-charging relay, a pre-charging resistor and a main positive relay, wherein the negative electrode of the battery module is connected with the shunt in series, the positive electrode of the battery module is connected with the main fuse and the main positive relay in series, and the positive electrode of the battery module is connected with the pre-charging relay and the pre-charging resistor in parallel.
Preferably, the heating system comprises a heating film, a heating relay and a heating fuse, wherein the heating film is connected with the anode of the OBC charger after being connected in series with the heating relay and the heating fuse, the other side of the heating film is connected with the cathode of the OBC charger, and the BMS system is connected with the heating relay in series.
Preferably, the battery pack connector is provided with a high-voltage interlocking device, when the connector is not fastened or connected in place in a plugging connection mode, the high-voltage interlocking terminals cannot be connected, the BMS detects that the high-voltage interlocking terminals cannot be linked, and judges that the linking fault exists, so that the whole vehicle cannot be subjected to high voltage. Thereby playing a role of high-voltage safety protection.
Preferably, the heating film, the heating relay and the heating fuse form a battery pack heating device, and the battery pack heating device is used for heating lithium ion battery monomers or modules in a battery pack to enable the battery to work in a proper temperature range; charging at low temperature, the battery is heated (heating and recharging are performed before the battery is heated below 0 ℃), so that the battery is charged at a proper temperature, and the BMS cuts off charging after full power.
An intelligent heat-preservation electricity-supplementing method for a pure electric vehicle comprises the following steps:
s1, the BMS detects the temperature of a battery pack, controls a heating system to start a heating function at the time of over-low temperature of the battery pack, and then sends an instruction to request OBC to work and request corresponding heating current.
S2, controlling the temperature of the battery to be higher than 10 ℃, and closing the heating system.
And S3, after the battery is charged fully, the BMS detects the temperature of the battery in real time, when the temperature of the battery is lower than 10 ℃, the BMS controls the starting of the heating system and the charging system to heat the battery, and the temperature of the battery reaches 25 ℃ and stops heating.
S4, the BMS enters a dormant state, the temperature of the battery pack is detected in real time, and the heating process step is restarted when the battery temperature is lower than 10 ℃.
The technical scheme and the method have the following advantages: according to the invention, in the charging process and in the full-charge state, the BMS detects the temperature in real time, the battery pack heating system and the charging system are controlled to control the temperature of the battery pack in a proper range, so that the battery discharge capacity is kept in an optimal state, the endurance mileage of the lithium ion battery in winter is prolonged, the service life of the lithium ion battery is prolonged, and the popularization of a new energy automobile in northern cold areas is facilitated, and the battery pack is environment-friendly.
Drawings
Fig. 1 is a schematic diagram of the overall circuit of the present invention.
FIG. 2 is a schematic diagram of a circuit of the A part of the invention
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
Examples
The utility model provides a pure electric vehicles intelligence heat preservation and mends electric structure, as shown in fig. 1, including charging system, heating system and battery system, charging system's positive pole passes through the wire and is connected with heating system, charging system's negative pole passes through the wire and is connected with heating system, forms complete closed circuit, battery system and heating system parallel connection.
In order to further optimize the scheme, charging system includes OBC charger, negative pole wire, positive pole wire, zero line, live wire and ground wire, OBC charger one side is connected with zero line, live wire and ground wire respectively, OBC charger opposite side is connected with heating system through negative pole wire and positive pole wire respectively.
For further optimizing above-mentioned scheme, battery system includes shunt, battery module, main fuse, pre-charge relay, pre-charge resistance and main positive relay, battery module's negative pole and shunt series connection, battery module's anodal and main fuse and main positive relay series connection, battery module's anodal and pre-charge relay and pre-charge resistance parallel connection.
For further optimizing above-mentioned scheme, heating system includes heating film, heating relay and heating fuse, heating film and heating relay, heating fuse are connected in series back with OBC charger positive pole, the heating film opposite side is connected with OBC charger negative pole, BMS system and heating relay series connection.
In order to further optimize the scheme, the battery pack connector is provided with the high-voltage interlocking device, when the connector is not fastened or connected in place in a plugging and connecting mode, the high-voltage interlocking terminals cannot be connected, the BMS detects that the high-voltage interlocking terminals cannot be linked, and the linking fault is judged, so that the whole vehicle cannot be subjected to high voltage. Thereby playing a role of high-voltage safety protection.
In order to further optimize the scheme, the heating film, the heating relay and the heating fuse form a battery pack heating device, and the battery pack heating device is used for heating lithium ion battery monomers or modules in a battery pack to enable the battery to work in a proper temperature range; charging at low temperature, the battery is heated (heating and recharging are performed before the battery is heated below 0 ℃), so that the battery is charged at a proper temperature, and the BMS cuts off charging after full power.
An intelligent heat-preservation electricity-supplementing method for a pure electric vehicle comprises the following steps:
s1, the BMS detects the temperature of a battery pack, controls a heating system to start a heating function at the time of over-low temperature of the battery pack, and then sends an instruction to request OBC to work and request corresponding heating current.
S2, controlling the temperature of the battery to be higher than 10 ℃, and closing the heating system.
And S3, after the battery is charged fully, the BMS detects the temperature of the battery in real time, when the temperature of the battery is lower than 10 ℃, the BMS controls the starting of the heating system and the charging system to heat the battery, and the temperature of the battery reaches 25 ℃ and stops heating.
S4, the BMS enters a dormant state, the temperature of the battery pack is detected in real time, and the heating process step is restarted when the battery temperature is lower than 10 ℃.
In order to further optimize the scheme, the temperature of the battery is detected in real time in the whole vehicle running, charging and other processes, and the state of the current battery at the temperature is judged according to the temperature BMS of the battery, so that MAP (maximum power point) in discharging and charging is judged, and the corresponding battery is requested to be charged or the corresponding power vehicle is sent to run.
In order to further optimize the scheme, the low-temperature battery charges in winter, insert the charging and rob after full electricity, BMS real-time detection battery package temperature, when the temperature of battery is less than 10 ℃ (parameter settable), BMS wakes up OBC (machine that charges) and allows OBC work, BMS control heating relay actuation simultaneously, request the corresponding heating current of OBC, the heating membrane work heats battery system, make battery temperature heat to 25 ℃ (parameter settable), send the instruction and let OBC stop working, break heating relay, BMS gets into dormancy standby state, continue real-time detection battery package's temperature, during this period BMS detects battery temperature and reduces below 10 ℃, continue to open the heating flow and make battery temperature keep at 10 ℃ -25 ℃ (parameter settable), even if external temperature is still low again in winter, the battery temperature keeps at more suitable temperature range, the heating process uses the electricity of charging stake (external electric wire netting) to heat for the battery, keep the battery still full electric state.
While the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. The scope of the disclosure should, therefore, not be limited to the above-described embodiments, but should be determined not only by the following claims, but also by the equivalents of the following claims.
Claims (6)
1. The utility model provides a pure electric vehicle intelligence heat preservation moisturizing structure, its characterized in that, including charging system, heating system and battery system, charging system's positive pole is connected with heating system through the wire, charging system's negative pole is connected with heating system through the wire, forms complete closed circuit, battery system and heating system parallel connection.
2. The intelligent heat-preservation electricity-supplementing structure of a pure electric vehicle according to claim 1, wherein the charging system comprises an OBC charger, a negative electrode wire, a positive electrode wire, a zero wire, a live wire and a ground wire, one side of the OBC charger is connected with the zero wire, the live wire and the ground wire respectively, and the other side of the OBC charger is connected with the heating system through the negative electrode wire and the positive electrode wire respectively.
3. The intelligent heat-preservation and electricity-supplementing structure of a pure electric vehicle according to claim 1, wherein the battery system comprises a shunt, a battery module, a main fuse, a pre-charging relay, a pre-charging resistor and a main positive relay, wherein the negative electrode of the battery module is connected with the shunt in series, the positive electrode of the battery module is connected with the main fuse and the main positive relay in series, and the positive electrode of the battery module is connected with the pre-charging relay and the pre-charging resistor in parallel.
4. The intelligent heat-preservation and electricity-supplementing structure of a pure electric vehicle according to claim 1, wherein the heating system comprises a heating film, a heating relay and a heating fuse, the heating film is connected with an anode of an OBC charger after being connected in series with the heating relay and the heating fuse, the other side of the heating film is connected with a cathode of the OBC charger, and the BMS system is connected with the heating relay in series.
5. An intelligent thermal insulation and power supplementing structure for a pure electric vehicle as defined in claim 3, wherein said battery system connector has high voltage interlocking means.
6. The intelligent heat-preservation electricity-supplementing method for the pure electric vehicle is characterized by comprising the following steps of:
(1) S1, detecting the temperature of a battery pack by the BMS, firstly controlling a heating system to start a heating function when the temperature of the battery pack is lower than 0 ℃, and then requesting an OBC to work by an instruction and requesting corresponding heating current;
(2) Controlling the temperature of the battery to be more than 10 ℃ and closing the heating system;
(3) After the battery is charged fully, the BMS detects the temperature of the battery in real time, and when the temperature of the battery is lower than 10 ℃, the BMS controls the heating system and the charging system to heat the battery, and the temperature of the battery reaches 25 ℃ and stops heating;
(4) The BMS enters a dormant state, detects the temperature of the battery pack in real time, and restarts the heating process step when the battery temperature is lower than 10 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311672651.0A CN117644801A (en) | 2023-12-07 | 2023-12-07 | Intelligent heat-preservation electricity supplementing structure and electricity supplementing method for pure electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311672651.0A CN117644801A (en) | 2023-12-07 | 2023-12-07 | Intelligent heat-preservation electricity supplementing structure and electricity supplementing method for pure electric vehicle |
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| Publication Number | Publication Date |
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| CN117644801A true CN117644801A (en) | 2024-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311672651.0A Pending CN117644801A (en) | 2023-12-07 | 2023-12-07 | Intelligent heat-preservation electricity supplementing structure and electricity supplementing method for pure electric vehicle |
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| CN (1) | CN117644801A (en) |
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- 2023-12-07 CN CN202311672651.0A patent/CN117644801A/en active Pending
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