CN211335653U - Self-preheating device in vehicle-mounted battery - Google Patents
Self-preheating device in vehicle-mounted battery Download PDFInfo
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- CN211335653U CN211335653U CN201922098786.6U CN201922098786U CN211335653U CN 211335653 U CN211335653 U CN 211335653U CN 201922098786 U CN201922098786 U CN 201922098786U CN 211335653 U CN211335653 U CN 211335653U
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T10/72—Electric energy management in electromobility
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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Abstract
The utility model discloses an internal self-preheating device of vehicle-mounted battery, include the group battery that sets up vehicle-mounted battery equivalent group, still be equipped with two-way DC converter in the vehicle-mounted battery, each group battery connects in parallel respectively at the output of two-way DC converter, two-way DC converter still electricity is connected with the load connecting terminal that sets up with each group battery is parallelly connected, be connected with load control switch on the wire that load connecting terminal and each group battery are parallelly connected, it has preheating control switch to establish ties on the wire that one of them group battery and two-way DC converter are connected, still include load/preheat conversion equipment; under the control of the load/preheating conversion device, each battery pack charges the other side through the bidirectional DC/DC converter, current always passes through each battery pack in a charging and discharging cycle, and the interior of each battery pack can automatically generate heat due to the internal resistance in the battery pack.
Description
Technical Field
The utility model relates to an electric automobile or new energy automobile's battery management technical field especially relates to an inside self-preheating device of on-vehicle battery.
Background
For an electric vehicle or a new energy vehicle, in order to improve the battery life of the vehicle in winter, the battery needs to be preheated to meet the vehicle demand of the electric vehicle or the new energy vehicle in winter, which is determined by the characteristics of the electrolyte in the battery. The electrolyte plays a role in conducting ions between the positive electrode and the negative electrode of the lithium battery, and the lithium battery is guaranteed to obtain the advantages of high voltage, high specific energy and the like, so that the lower the viscosity of the electrolyte is, the more beneficial the viscosity of the electrolyte is to the movement of lithium ions, and the higher the viscosity of the electrolyte is, certain internal resistance is formed to the movement of the lithium ions, the viscosity of the electrolyte is related to the temperature, the viscosity of the electrolyte can rise along with the reduction of the temperature, so that the charge and discharge performance of the battery is reduced, and therefore, the battery needs to be preheated under a low-temperature environment to guarantee the discharge performance and the endurance mileage of the battery.
At present electric automobile or new energy automobile battery low temperature preheat, generally adopt charging source to preheat when charging or adopt the electric energy of battery self to preheat when the driving, have the electrical heating membrane in the outside cladding of battery package, consequently above preheating mode all adopts the power to supply power for the electrical heating membrane of battery package, and the electrical heating membrane preheats the inside battery of battery package through the heat transfer after generating heat. The method for preheating the battery has many disadvantages, such as the influence of the coating position of the electric heating film, more heat dissipation to the external space of the battery pack, less and slow transmission to the internal space; limited by the arrangement of the battery packs in the battery pack, the battery packs are not uniformly preheated, and in short, the preheating mode causes low battery preheating efficiency and unsatisfactory preheating effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a battery preheats by inside production, preheats efficiently, and every battery preheats even on-vehicle battery is inside from preheating device.
In order to solve the technical problem, the technical scheme of the utility model is that: the internal self-preheating device for the vehicle-mounted battery comprises battery packs which are used for grouping the vehicle-mounted battery in equal quantity, a bidirectional DC/DC converter is further arranged in the vehicle-mounted battery, each battery pack is respectively connected in parallel to the output end of the bidirectional DC/DC converter, the bidirectional DC/DC converter is further electrically connected with load connecting terminals which are connected in parallel with the battery packs, the load connecting terminals and wires which are connected in parallel with the battery packs are connected with load control switches, a preheating control switch is connected in series on a wire which is connected with one battery pack and the bidirectional DC/DC converter, and the internal self-preheating device for the vehicle-mounted battery further comprises a load/preheating conversion device, and the load/preheating conversion device is respectively connected to the bidirectional DC/DC converter, the load control switch and the preheating control switch.
Preferably, the on-vehicle battery is equally divided into a first battery pack and a second battery pack, and the preheating control switch is connected in series with a connecting wire between the second battery pack and the bidirectional DC/DC converter.
As an improvement to the above technical solution, the load/preheat switching device includes a battery management module BMS, the battery management module BMS is connected in parallel with a load relay and a preheat relay, a normally open contact of the load relay also serves as the load control switch, and a normally open contact of the preheat relay also serves as the preheat control switch.
As a preferred technical scheme, a remote communication module is further arranged in the load/preheating conversion device, and the remote communication module is in signal connection with a mobile intelligent terminal.
As a preferable technical scheme, the remote communication module comprises a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies.
As a preferable technical scheme, the mobile intelligent terminal comprises a mobile phone, a remote controller or/and a portable computer.
Since the technical scheme is used, the utility model discloses following beneficial effect has: when heating, the vehicle-mounted batteries are divided into groups, each group is connected to the bidirectional DC/DC converter in parallel, under the control of the load/preheating conversion device, each battery pack charges the other side through the bidirectional DC/DC converter, current always passes through each battery pack in a charging and discharging cycle, the internal resistance of each battery pack causes the internal heat of each battery pack, the energy is always converted among the battery packs, the rest energy can be converted into the internal resistance of the batteries to generate heat in actual use except the heat loss caused by the bidirectional DC/DC converter, the preheating power consumption is low, the efficiency is high, the bidirectional DC/DC converter is also arranged in the vehicle-mounted batteries, the heat loss of the bidirectional DC/DC converter can preheat each battery pack from the outside, and zero-loss utilization of heat is realized Preheating is uniform, and the temperature uniformity of each battery monomer inside is guaranteed.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a block diagram of an embodiment of the present invention;
fig. 2 is a schematic circuit diagram illustrating a connection between a battery pack and a bidirectional DC/DC converter according to an embodiment of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1 and 2, the internal self-preheating device for the vehicle-mounted battery includes battery packs that are arranged in groups in equal amount, a bidirectional DC/DC converter is further disposed in the vehicle-mounted battery, and each battery pack is respectively connected in parallel to an output end of the bidirectional DC/DC converter. In this embodiment, the on-vehicle batteries are equally grouped into the first battery pack a and the second battery pack B, and other numbers of battery packs may be equally grouped according to the capacity of the on-vehicle batteries.
The bidirectional DC/DC converter is further electrically connected with load connection terminals arranged in parallel with the battery packs, the load connection terminals are connected with load control switches S1 on the wires connected in parallel with the battery packs, wherein a preheating control switch S2 is connected in series on the wire connected with one battery pack and the bidirectional DC/DC converter, in this embodiment, because the first battery pack a and the second battery pack B are arranged, the preheating control switch S2 is connected in series on the connection wire between the second battery pack B and the bidirectional DC/DC converter, of course, the preheating control switch S2 can also be connected in series on the connection wire between the first battery pack a and the bidirectional DC/DC converter, and can be customized according to the use requirements of users.
In actual use, the load control switch S1 and the preheating control switch S2 are selected for use according to functional requirements. When the load control switch S1 is closed, the preheating control switch S2 is turned off, and the vehicle-mounted battery starts to output voltage to an external load for use in operation of the external load; when the load control switch S1 is switched off, the preheating control switch S2 is switched on, the voltage output to an external load is stopped, power is supplied alternately among the battery packs, and the aim of preheating the vehicle-mounted battery is fulfilled.
The present embodiment further includes a load/preheat switching device connected to the bidirectional DC/DC converter, the load control switch S1, and the preheat control switch S2, respectively. Specifically, the load/preheat switching device includes a battery management module BMS connected in parallel with a load relay and a preheat relay, a normally open contact of the load relay concurrently serves as the load control switch S1, and a normally open contact of the preheat relay concurrently serves as the preheat control switch S2. And under the management control of the battery management module BMS, controlling the corresponding function to be started according to the requirement.
In this embodiment, during normal charging and discharging, the battery management module BMS controls the load control switch S1 to be turned on, the preheating control switch S2 to be turned off, and the first battery pack a and the second battery pack B provide electric energy to a load on the vehicle in parallel. When the vehicle-mounted battery needs to be preheated, the battery management module BMS controls the load control switch S1 to be switched off, the preheating control switch S2 is switched on, the bidirectional DC/DC converter (with the power of about 5 kw) built in the vehicle-mounted battery is enabled, the first battery pack A is controlled to be charged after being boosted by the voltage of the second battery pack B, the energy transmission direction is switched after ten minutes, namely the second battery pack B is charged after being boosted by the voltage of the first battery pack A, and the switching is performed once every ten minutes according to the charging mode, so that the two battery packs are continuously charged and discharged. Through electric quantity transmission, under the action of the internal resistance of the vehicle-mounted battery, each battery monomer is heated from the inside of the vehicle-mounted battery until the temperature reaches a set value in the battery management module BMS. The detection and control of the preheating temperature can be realized by matching with the currently commonly used temperature sensor and other parts, which are well known to those skilled in the art. After the preheating temperature reaches a set value, the battery management module BMS stops enabling the bidirectional DC/DC converter, controls the load control switch S1 to be closed, turns off the preheating control switch S2, enables the two battery packs to be in the same voltage through parallel connection under the action of the battery management module BMS, and enables the capacity difference of the two battery packs caused by the heating process to be automatically balanced.
In this embodiment, a remote communication module is further arranged in the load/preheat conversion device, and the remote communication module is in signal connection with a mobile intelligent terminal. In particular, the telecommunications module comprises a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies. The mobile intelligent terminal comprises a mobile phone, a remote controller or/and a portable computer, wherein the mobile phone, the remote controller or/and the portable computer are internally provided with corresponding control APP, and the control APP is used for sending a control signal to the load/preheating conversion device.
Under low temperature environment, when needing the vehicle-hour, can pass through in advance the cell-phone remote controller or/and APP starting program remote start in the portable computer preheats the function, or carries out on-vehicle battery's reservation heating, if when using the vehicle-hour at the fixed time every day winter, can also pass through remote communication module fixed point self-starting preheats, realizes on-vehicle battery preheats intelligent control.
The utility model divides the vehicle-mounted batteries into groups and each group is connected in parallel to the bidirectional DC/DC converter, each battery group charges the other side through the bidirectional DC/DC converter under the control of the load/preheating conversion device, each battery group always has current to pass through in the charging and discharging circulation, because the internal resistance exists in the battery group, the internal part of the battery group can automatically generate heat, because the energy is always converted between each battery group, the rest energy can be converted into the internal resistance of the battery to generate heat except the heat loss caused by the bidirectional DC/DC converter during the actual use, the preheating power consumption is little, the efficiency is high, the bidirectional DC/DC converter is also arranged in the vehicle-mounted batteries, the heat loss can preheat each battery group from the outside, the zero loss utilization of heat is realized, the vehicle-mounted batteries are preheated by the inside, the heat is generated from the inside, the preheating efficiency of the vehicle-mounted battery is high, the preheating is uniform, and the temperature uniformity of each battery monomer inside the vehicle-mounted battery is ensured.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. Inside self-preheating device of on-vehicle battery, its characterized in that: the vehicle-mounted battery preheating system comprises battery packs which are arranged in groups in an equivalent manner, bidirectional DC/DC converters are further arranged in the vehicle-mounted batteries, the battery packs are respectively connected in parallel to the output ends of the bidirectional DC/DC converters, the bidirectional DC/DC converters are further electrically connected with load connecting terminals which are arranged in parallel with the battery packs, the load connecting terminals and wires which are connected with the battery packs in parallel are connected with load control switches, a preheating control switch is connected in series to a wire which is connected with one of the battery packs and the bidirectional DC/DC converters, and the vehicle-mounted battery preheating system further comprises a load/preheating conversion device, and the load/preheating conversion device is respectively connected to the bidirectional DC/DC converters, the load control switch and the preheating control switch.
2. The in-vehicle battery internal self-warming device according to claim 1, wherein: the vehicle-mounted battery is equivalently divided into a first battery pack and a second battery pack, and the preheating control switch is connected in series with a connecting wire of the second battery pack and the bidirectional DC/DC converter.
3. The in-vehicle battery internal self-warming device according to claim 1, wherein: the load/preheating conversion device comprises a battery management module BMS, wherein the battery management module BMS is connected with a load relay and a preheating relay in parallel, a normally open contact of the load relay is also used as the load control switch, and a normally open contact of the preheating relay is also used as the preheating control switch.
4. The in-vehicle battery internal self-warming device according to claim 1, 2 or 3, wherein: and a remote communication module is also arranged in the load/preheating conversion device, and the remote communication module is in signal connection with a mobile intelligent terminal.
5. The in-vehicle battery internal self-warming device according to claim 4, wherein: the remote communication module comprises a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies.
6. The in-vehicle battery internal self-warming device according to claim 4, wherein: the mobile intelligent terminal comprises a mobile phone, a remote controller or/and a portable computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922098786.6U CN211335653U (en) | 2019-11-27 | 2019-11-27 | Self-preheating device in vehicle-mounted battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922098786.6U CN211335653U (en) | 2019-11-27 | 2019-11-27 | Self-preheating device in vehicle-mounted battery |
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| Publication Number | Publication Date |
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| CN211335653U true CN211335653U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922098786.6U Active CN211335653U (en) | 2019-11-27 | 2019-11-27 | Self-preheating device in vehicle-mounted battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113650529A (en) * | 2021-07-02 | 2021-11-16 | 北京新能源汽车股份有限公司蓝谷动力系统分公司 | Method, device and circuit for heating battery pack and battery pack |
-
2019
- 2019-11-27 CN CN201922098786.6U patent/CN211335653U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113650529A (en) * | 2021-07-02 | 2021-11-16 | 北京新能源汽车股份有限公司蓝谷动力系统分公司 | Method, device and circuit for heating battery pack and battery pack |
| CN113650529B (en) * | 2021-07-02 | 2024-05-14 | 北京新能源汽车股份有限公司蓝谷动力系统分公司 | Method, device and circuit for heating battery pack and battery pack |
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