CN113871757A - Battery heating system and battery heating method thereof - Google Patents
Battery heating system and battery heating method thereof Download PDFInfo
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- CN113871757A CN113871757A CN202010623896.4A CN202010623896A CN113871757A CN 113871757 A CN113871757 A CN 113871757A CN 202010623896 A CN202010623896 A CN 202010623896A CN 113871757 A CN113871757 A CN 113871757A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 238000010586 diagram Methods 0.000 description 10
- 239000000498 cooling water Substances 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The disclosure relates to a battery heating system and a battery heating method thereof, which are used for realizing self-heating of a battery. The method comprises the following steps: the water circuit comprises a first power battery, a second power battery, a first motor controller connected with the first power battery, a vehicle-mounted charger connected with the second power battery, a connecting switch, a water circuit pipeline and a controller, wherein the connecting switch is arranged between the first motor controller and the vehicle-mounted charger and is used for realizing the electric connection of the first motor controller and the vehicle-mounted charger; the controller is used for controlling the first motor controller and the vehicle-mounted charger to exchange charging and discharging energy of the first power battery and the second power battery when the first motor controller is electrically connected with the vehicle-mounted charger, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the water pipeline.
Description
Technical Field
The disclosure relates to the field of batteries, in particular to a battery heating system and a battery heating method thereof.
Background
With the popularization of electric vehicles, power batteries have become one of the important parts of electric vehicles. The power battery is used as a main energy storage device of a battery pack loaded on the electric automobile, is a key component of the electric automobile, and directly influences the performance of the electric automobile. The power battery has higher requirement on the working temperature, and if the working temperature is too high, the attenuation speed of the battery can be accelerated, so that the service life of the battery is reduced, and even safety accidents can be caused. In the related art, when the air Temperature is low, the battery heating module is arranged on the vehicle, the heat generated by the PTC heating acting is utilized to heat the whole vehicle circulation water path, and the heat is transferred to the battery through the water path, so that the heating of the battery is realized. However, adding a PTC battery heating module to the vehicle for battery heating increases costs and wastes energy.
Disclosure of Invention
The purpose of the present disclosure is to provide a battery heating system and a battery heating method thereof, so as to realize self-heating of a battery.
In order to achieve the above object, according to a first aspect of the present disclosure, there is provided a battery heating system including: the vehicle-mounted charging device comprises a first power battery, a second power battery, a first motor controller connected with the first power battery, a connecting switch, a vehicle-mounted charging machine connected with the second power battery, a water path pipeline and a controller, wherein the connecting switch is arranged between the first motor controller and the vehicle-mounted charging machine and used for realizing the electric connection of the first motor controller and the vehicle-mounted charging machine, and the water path pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charging machine;
the controller is used for controlling the first motor controller and the vehicle-mounted charger to perform charging and discharging energy exchange on the first power battery and the second power battery when the first motor controller is electrically connected with the vehicle-mounted charger, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the waterway pipeline.
Optionally, the controller is configured to control the first motor controller to perform inverse discharge on the first power battery to obtain a first alternating current when the first motor controller is electrically connected to the vehicle-mounted charger, and control the vehicle-mounted charger to charge the second power battery with the first alternating current; or,
the controller is used for controlling the vehicle-mounted charger to perform inverted discharge on the second power battery to obtain second alternating current when the first motor controller is electrically connected with the vehicle-mounted charger, and controlling the first motor controller to charge the first power battery by using the second alternating current.
Optionally, the controller is configured to control the first motor controller to perform inverse discharge on the first power battery when the first power battery is full or the first power battery is higher than the second power battery; or the controller is used for controlling the vehicle-mounted charger to perform inverse discharge on the second power battery under the condition that the second power battery is full or the electric quantity of the second power battery is higher than that of the first power battery.
Optionally, the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger, and a first contact;
the controller is used for controlling the first switch and the second switch to be connected to the first contact under the condition that the heating function of the battery heating system is started, so that the first motor controller is electrically connected with the vehicle-mounted charger.
Optionally, the battery heating system further comprises a first motor, and the connection switch is arranged between the first motor and the first motor controller and used for electrically connecting the first motor and the first motor controller;
the controller is used for electrically connecting the first motor and the first motor controller through the connecting switch when the vehicle is in a running state, and providing power for the vehicle through the first motor.
Optionally, the connection switch is provided with a first switch connected with the first motor controller, a third switch connected with the first motor, and a first contact;
the controller is configured to control the first switch and the third switch to be connected to the first contact so that the first motor and the first motor controller are electrically connected when a heating function of the battery heating system is turned on and the vehicle is in a driving state.
Optionally, the connection switch is further provided with a second contact connected with the first contact;
the controller is used for controlling the third switch to be connected to the second contact point so that the third switch is connected with the first contact point through the second contact point.
Optionally, the battery heating system further includes a first motor and a vehicle-mounted charging port, and the connection switch is provided with a first switch connected to the first motor controller, a second switch connected to the vehicle-mounted charger, a third switch connected to the first motor, a third contact connected to the vehicle-mounted charging port, and a fourth contact;
the controller is used for controlling the second switch to be connected to the third contact point and controlling the first switch and the third switch to be connected to the fourth contact point respectively under the condition that the heating function of the battery heating system is not started so as to provide power for a vehicle through the first motor and/or charge the vehicle through the vehicle-mounted charging port.
According to a second aspect of the present disclosure, there is provided a battery heating method of a battery heating system, the battery heating system including: the method is characterized by comprising a first power battery, a second power battery, a first motor controller connected with the first power battery, a connecting switch, a vehicle-mounted charger connected with the second power battery, a water path pipeline and a controller, wherein the connecting switch is arranged between the first motor controller and the vehicle-mounted charger and used for realizing the electric connection of the first motor controller and the vehicle-mounted charger, the water path pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger, and the method is applied to the controller and comprises the following steps:
when the first motor controller is electrically connected with the vehicle-mounted charger, the first motor controller and the vehicle-mounted charger are controlled to exchange charging and discharging energy of the first power battery and the second power battery, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the waterway pipeline.
Optionally, the controlling the first motor controller and the vehicle-mounted charger to perform charge and discharge energy exchange on the first power battery and the second power battery includes:
controlling the first motor controller to perform inversion discharge on the first power battery to obtain first alternating current, and controlling the vehicle-mounted charger to charge the second power battery by using the first alternating current; or,
and controlling the vehicle-mounted charger to perform inversion discharge on the second power battery to obtain second alternating current, and controlling the first motor controller to charge the first power battery by using the second alternating current.
Optionally, the controlling the first motor controller to perform inverse discharge on the first power battery to obtain a first alternating current includes:
under the condition that the electric quantity of the first power battery is full or the electric quantity of the first power battery is higher than that of the second power battery, controlling the first motor controller to perform inverse discharge on the first power battery; or,
the control on-vehicle machine that charges to the second power battery contravariant discharges, obtains the second alternating current, includes:
and under the condition that the second power battery is full or the electric quantity of the second power battery is higher than that of the first power battery, controlling the vehicle-mounted charger to perform inverse discharge on the second power battery.
Optionally, the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger, and a first contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is started, controlling the first switch and the second switch to be connected to the first contact so as to electrically connect the first motor controller with the vehicle-mounted charger.
Optionally, the battery heating system further comprises a first motor, and the connection switch is arranged between the first motor and the first motor controller and used for electrically connecting the first motor and the first motor controller;
the method further comprises the following steps:
when the vehicle is in a running state, the first motor and the first motor controller are electrically connected through the connecting switch, and power is provided for the vehicle through the first motor.
Optionally, the connection switch is provided with a first switch connected with the first motor controller, a third switch connected with the first motor, and a first contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is started and the vehicle is in a running state, controlling the first switch and the third switch to be connected to the first contact point so as to electrically connect the first motor and the first motor controller.
Optionally, the connection switch is further provided with a second contact connected with the first contact;
the controlling the first switch and the third switch to be connected to the first contact includes:
controlling the first switch to be connected to the first contact; and the number of the first and second groups,
controlling the third switch to connect to the second contact such that the third switch connects with the first contact through the second contact.
Optionally, the battery heating system further includes a first motor and a vehicle-mounted charging port, and the connection switch is provided with a first switch connected to the first motor controller, a second switch connected to the vehicle-mounted charger, a third switch connected to the first motor, a third contact connected to the vehicle-mounted charging port, and a fourth contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is not started, controlling the second switch to be connected to the third contact, and controlling the first switch and the third switch to be respectively connected to the fourth contact so as to provide power for the vehicle through the first motor and/or charge the vehicle through the vehicle-mounted charging port.
Through above-mentioned technical scheme, provide a battery heating system, include: the vehicle-mounted power battery charging system comprises a first power battery, a second power battery, a first motor controller connected with the first power battery, a vehicle-mounted charger connected with the second power battery, a connecting switch, a water path pipeline and a controller. The water circuit pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger. When the first motor controller is electrically connected with the vehicle-mounted charger, the controller controls the first motor controller and the vehicle-mounted charger to exchange charging and discharging energy of the first power battery and the second power battery, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the water pipeline. Therefore, under the condition that the battery needs to be heated, the controller controls the connecting switch to realize the electric connection of the first motor controller and the vehicle-mounted charger and controls the first motor controller and the vehicle-mounted charger to carry out charge and discharge energy exchange on the first power battery and the second power battery, and heat generated in the charge and discharge energy exchange process is transferred to the power battery through the water pipeline, so that the battery is heated without the help of PTC, and the cost and the resource can be saved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic diagram of a prior art battery heating system;
FIG. 2 is a schematic diagram illustrating a configuration of a battery heating system according to an exemplary embodiment;
FIG. 3A is a topology diagram of an exemplary first motor controller;
FIG. 3B is a topological diagram of an exemplary vehicle charger;
FIG. 4 is a topology diagram illustrating a battery heating system according to an exemplary embodiment;
FIG. 5 is a topology diagram illustrating another battery heating system according to an exemplary embodiment;
FIG. 6 is a topology diagram illustrating another battery heating system according to an exemplary embodiment;
FIG. 7 is a topology diagram illustrating another battery heating system according to an exemplary embodiment;
fig. 8 is a flowchart of a battery heating method of a battery heating system provided according to an embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
With the popularization of electric vehicles, power batteries have become one of the important parts of electric vehicles. The power battery is used as a main energy storage device of a battery pack loaded on the electric automobile, is a key component of the electric automobile, and directly influences the performance of the electric automobile. The power battery has higher requirement on the working temperature, and if the working temperature is too high, the attenuation speed of the battery can be accelerated, so that the service life of the battery is reduced, and even safety accidents can be caused. In the related art, when the air Temperature is low, the battery heating module is arranged on the vehicle, the heat generated by the PTC heating acting is utilized to heat the whole vehicle circulation water path, and the heat is transferred to the battery through the water path, so that the heating of the battery is realized. Fig. 1 is a schematic diagram of an exemplary structure of a battery heating system in the prior art, and in fig. 1, the battery heating system includes a power battery, a motor controller, a motor, a DC-DC (direct current-direct current converter), an OBC (On board Charger), a PTC battery heating module, and a low-voltage battery. However, adding a PTC battery heating module to the vehicle for battery heating increases costs and wastes energy.
In order to solve the above problems, the present disclosure provides a battery heating system and a battery heating method thereof, which can heat a battery without using a PTC heating module.
In the battery heating system provided in the present disclosure, comprising: the vehicle-mounted power battery charging system comprises a first power battery, a second power battery, a first motor controller connected with the first power battery, a vehicle-mounted charger connected with the second power battery, a connecting switch, a water path pipeline and a controller.
The connecting switch is arranged between the first motor controller and the vehicle-mounted charger and used for achieving electric connection of the first motor controller and the vehicle-mounted charger. The water channel pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger.
When the first motor controller is electrically connected with the vehicle-mounted charger, the controller controls the first motor controller and the vehicle-mounted charger to exchange charging and discharging energy of the first power battery and the second power battery, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the water pipeline.
Therefore, under the condition that the battery needs to be heated, the controller controls the connecting switch to realize the electric connection of the first motor controller and the vehicle-mounted charger and controls the first motor controller and the vehicle-mounted charger to carry out charge and discharge energy exchange on the first power battery and the second power battery, and heat generated in the charge and discharge energy exchange process is transferred to the power battery through the water pipeline, so that the battery is heated without the help of PTC, and the cost and the resource can be saved.
The present disclosure is described in detail below with reference to specific examples.
Fig. 2 is a schematic structural view illustrating a battery heating system according to an exemplary embodiment, the battery heating system, as shown in fig. 2, including: the vehicle-mounted power battery charging system comprises a first power battery, a second power battery, a first motor controller connected with the first power battery, a vehicle-mounted charger connected with the second power battery, a connecting switch, a water path pipeline and a controller.
The batteries can be heated by arranging the water channel pipeline, and in a normal situation, the first power battery and the second power battery need to be heated by utilizing heat generated by the first motor controller and the vehicle-mounted charger, so that the water channel pipeline at least needs to pass through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger. In fig. 2, the water pipeline is indicated by a dotted line, and it can be seen that the water pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger. It should be noted that the water channel is not limited to the arrangement shown in fig. 2, and other water channel arrangements that can pass through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger all belong to the protection scope of the present disclosure.
The water channel pipeline comprises a cooling water channel arranged in the first power battery, the second power battery, the vehicle-mounted charger and the first motor controller, and a communication pipeline arranged between the first power battery, the second power battery, the vehicle-mounted charger and the first motor controller.
The first power battery, the second power battery, the first motor controller and the vehicle-mounted charger are all internally provided with cooling water channels, and the water channel pipeline communicates the cooling water channels inside each component through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger.
The connecting switch is used for electrically connecting the components, is arranged between the first motor controller and the vehicle-mounted charger and is used for electrically connecting the first motor controller and the vehicle-mounted charger. For example, the connection switch may be provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger, and a first contact. And the first motor controller and the vehicle-mounted charger can be electrically connected by controlling the first switch and the second switch to be connected to the first contact.
The controller is respectively connected with the first motor controller, the vehicle-mounted charger and the connecting switch and is used for controlling the on-off of the switch inside the component.
The controller is used for controlling the first motor controller and the vehicle-mounted charger to exchange charging and discharging energy of the first power battery and the second power battery when the first motor controller is electrically connected with the vehicle-mounted charger, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the water pipeline.
For example, the connection switch may be provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger, and a first contact. Therefore, the controller can control the first switch and the second switch to be connected to the first contact under the condition that the heating function of the battery heating system is started, so that the first motor controller is electrically connected with the vehicle-mounted charger, and the battery heating is further realized.
Illustratively, the first motor controller employs a motor controller having a bi-directional function. The first motor controller can enable the first power battery to output electric energy to drive the motor to work, so that the inversion function is realized, and the electric quantity output by an external device can be charged into the first power battery, so that the rectification function is realized. The topology of the first motor controller can be as shown in fig. 3A, and it can drive the motor and can discharge the on-board charger OBC. The controller is respectively connected with the first motor controller, the vehicle-mounted charger and the connecting switch, so that the first motor controller, the vehicle-mounted charger and the connecting switch can be controlled. Illustratively, the on-board charger OBC adopts a three-phase bridge PFC and interleaved LLC topology, has a bidirectional charge and discharge function, and can implement a three-phase charge or discharge function as shown in fig. 3B. For example, the vehicle-mounted charger may be connected to the second power battery through the first power distribution switch.
In the invention, the first motor controller and the vehicle-mounted charger carry out charging and discharging energy exchange on the first power battery and the second power battery through the first motor controller and the vehicle-mounted charger, so that the heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through a waterway pipeline to heat the first power battery and the second power battery, and in the battery heating process, the energy in the first power battery and the second power battery flows back and forth, wherein a part of the energy is lost in the form of heat, and the energy loss in the battery heating process is reduced as far as possible.
In a possible implementation manner, the controller is configured to control the first motor controller to perform inverse discharge on the first power battery to obtain a first alternating current when the first motor controller is electrically connected with the vehicle-mounted charger, and control the vehicle-mounted charger to charge the second power battery by using the first alternating current.
For example, the controller may control the first motor controller to perform inverse discharge on the first power battery when the first power battery is full or the first power battery is higher than the second power battery.
In another possible implementation manner, the controller is configured to control the vehicle-mounted charger to perform inverse discharge on the second power battery to obtain a second alternating current when the first motor controller is electrically connected with the vehicle-mounted charger, and control the first motor controller to charge the first power battery by using the second alternating current.
For example, the controller may control the vehicle-mounted charger to perform inverse discharge on the second power battery when the second power battery is full or the electric quantity of the second power battery is higher than the electric quantity of the first power battery.
FIG. 4 is a topology diagram illustrating a battery heating system according to an exemplary embodiment. The OBC can charge the first power battery and the second power battery, and can realize grid connection and discharge of vehicle-mounted electric appliances. The OBC can be controlled to charge (or stop charging) the first power battery by controlling the connection (or disconnection) of the second power distribution switch. The OBC can be controlled to charge (or stop charging) the second power battery by controlling the connection (or disconnection) of the first power distribution switch. As mentioned above, the waterway pipeline should pass through at least the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger. For example, in the battery heating system shown in fig. 4, the water tank and the water pump of the water path pipeline may be disposed near the second motor and the vehicle-mounted charger, and meanwhile, the water path pipeline may be divided into two paths to respectively pass through the second motor and the vehicle-mounted charger, where one path passes through the second motor, the second motor controller, the second power battery, and the other path passes through the vehicle-mounted charger. Through setting up the water route pipeline, can take the heat that produces in the battery heating system working process to the battery, for the battery heating.
An exemplary internal configuration of the connection switch is shown in fig. 4, and as shown in fig. 4, the connection switch is provided with a first switch S1 connected to the first motor controller, a second switch S2 connected to the vehicle-mounted charger, and a first contact a. In fig. 4, only the internal configuration of the connection switch is shown, and in this case, the connection switch does not have any connection.
Wherein, the controller can control the first switch (S1 in fig. 4) and the second switch (S2 in fig. 4) to be connected to the first contact (A in fig. 4) under the condition that the heating function of the battery heating system is started, so that the first motor controller is electrically connected with the vehicle-mounted charger. Therefore, when the first motor controller is electrically connected with the vehicle-mounted charger, the controller can control the first motor controller and the vehicle-mounted charger to exchange charging and discharging energy of the first power battery and the second power battery, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the water channel pipeline.
After the controller controls the first switch and the second switch to be connected to the first contact point in the above manner, the topology of the battery heating system may be as shown in fig. 5. In fig. 5, the first motor controller and the vehicle-mounted charger are electrically connected through a first contact a. And then, the controller can control the first motor controller and the vehicle-mounted charger to perform charge and discharge energy exchange on the first power battery and the second power battery so as to generate heat and heat the batteries.
When the first switch S1 and the second switch S2 are connected to the first contact a, the controller may control the first motor controller to perform inverse discharge on the first power battery, obtain a first alternating current, and control the vehicle-mounted charger to charge the second power battery with the first alternating current. Or, when the first switch S1 and the second switch S2 are connected to the first contact a, the controller may control the vehicle-mounted charger to perform inverse discharge on the second power battery, obtain the second alternating current, and control the first motor controller to charge the first power battery with the second alternating current. Therefore, the first power battery is continuously utilized to charge the second power battery, or the second power battery is utilized to charge the first power battery, so that the heat can be continuously generated, and further, the battery can be heated.
In one possible embodiment, the controller may control the first motor controller to perform inverse discharge on the first power battery when the first power battery is full or the first power battery is higher than the second power battery; or, the controller may control the vehicle-mounted charger to perform inverse discharge on the second power battery when the second power battery is full or the electric quantity of the second power battery is higher than the electric quantity of the first power battery. That is, when a certain power battery is full or the power battery is higher than another power battery, the other power battery can be charged by the power battery. For example, if the first power battery is full or the power of the first power battery is higher than that of the second power battery in the initial situation, when the first switch S1 and the second switch S2 are connected to the first contact a, the controller may first control the first motor controller to perform inverse transformation discharge on the first power battery with higher power to obtain a first alternating current, and control the vehicle-mounted charger to charge the second power battery with the first alternating current, and then reverse the process after the second power battery is fully charged, that is, the controller controls the vehicle-mounted charger to perform inverse transformation discharge on the second power battery to obtain a second alternating current, and controls the first motor controller to charge the first power battery with the second alternating current, and so on.
As illustrated in fig. 5, the process is not connected to the motor, and therefore, cannot provide power for the vehicle, and therefore, the process can be applied to a scenario in which the vehicle is in a non-driving state.
In one possible embodiment, the battery heating system may further include a first motor, and a connection switch may be provided between the first motor and the first motor controller for electrically connecting the first motor and the first motor controller. Accordingly, the controller may electrically connect the first motor and the motor controller through the connection switch when the vehicle is in a running state, so as to provide the vehicle with power required for running through the first motor.
For example, the connection switch may be provided with a first switch connected with the first motor controller, a third switch connected with the first motor, and a first contact. And the controller may control the first switch and the third switch to be connected to the first contact point so that the first motor and the first motor controller are electrically connected to power the vehicle by the first motor, in a case where the heating function of the battery heating system is turned on and the vehicle is in a driving state.
The internal construction of the connection switch is represented in fig. 5 as in fig. 4. Wherein the third switch may be as shown at S3 in fig. 4 and 5.
When the heating function of the battery heating system is turned on and the vehicle is in a running state, the battery needs to be heated and the vehicle needs to be powered, and therefore the motor needs to be connected. Thus, the controller may control the first switch and the third switch to be connected to the first contact to electrically connect the first motor and the first motor controller and power the vehicle via the first motor. Therefore, the battery heating in the running process of the vehicle can be realized, and the battery heating can be further accelerated by simultaneously driving the motor and heating the battery.
Fig. 5 shows a connection mode of the connection switch when the heating function of the battery heating system is turned on, and if the vehicle is in a driving state while the heating function of the battery heating system is turned on, it is necessary to connect the third switch to the first contact based on the connection mode of the connection switch in fig. 5, so that the first motor and the first motor controller are electrically connected. For example, in the case where the battery heating system heating function is turned on and the vehicle is in a running state, the third switch S3 may be further connected to the first contact a on the basis of the connection manner shown in fig. 5 to electrically connect the first motor and the first motor controller.
All switches cannot be directly connected to the same contact, limited by the number of contacts to which the switch itself can be connected and the number of contacts to which the contacts can be connected (e.g., one contact can only be connected by two switches), and therefore, another contact connected to a certain contact may be provided to increase the number of contacts to which the same contact is connected.
Therefore, in another possible embodiment, the connection switch may be further provided with a second contact connected with the first contact, and the controller may control the third switch to be connected to the second contact when connected to the first contact, so that the third switch is connected with the first contact through the second contact. As shown in fig. 6, the first motor is connected to the second contact B through the third switch S3, and the second contact B is connected to the first contact a, which is equivalent to connecting the first motor to the first contact a.
In a possible embodiment, the battery heating system further comprises a first motor and an on-vehicle charging port, and the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the on-vehicle charger, a third switch connected with the first motor, a third contact connected with the on-vehicle charging port, and a fourth contact.
The controller is used for controlling the second switch to be connected to the third contact point and controlling the first switch and the third switch to be respectively connected to the fourth contact point under the condition that the heating function of the battery heating system is not started so as to provide power for the vehicle through the first motor and/or charge the vehicle through the vehicle-mounted charging port.
In the case where the heating function of the battery heating system is not turned on, as shown in fig. 7, the second switch S2 is connected to the third contact C, and the first switch S1 and the third switch S3 are connected to the third fourth contact D, respectively. Like this, can realize supplying power for first motor through first power battery to provide power for the vehicle through first motor, and, can also charge for power battery through on-vehicle mouth that charges. This connection corresponds to a scenario in which the motor drives the vehicle or the vehicle is charged.
Fig. 8 is a flowchart of a battery heating method of a battery heating system provided according to an embodiment of the present disclosure. The battery heating system includes: the vehicle-mounted charging device comprises a first power battery, a second power battery, a first motor controller connected with the first power battery, a vehicle-mounted charging machine connected with the second power battery, a connecting switch, a water path pipeline and a controller, wherein the connecting switch is arranged between the first motor controller and the vehicle-mounted charging machine and used for achieving electric connection of the first motor controller and the vehicle-mounted charging machine, and the water path pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charging machine. Wherein the method may be applied to a controller. As shown in fig. 8, the method may include the following steps.
In step 81, detecting the electric connection condition of the first motor controller and the vehicle-mounted charger;
in step 82, when the first motor controller is electrically connected with the vehicle-mounted charger, the first motor controller and the vehicle-mounted charger are controlled to exchange charging and discharging energy between the first power battery and the second power battery, so that heat generated by the first motor controller and the vehicle-mounted charger in the process of exchanging the charging and discharging energy is transferred to the first power battery and the second power battery through the water channel pipeline.
Through the scheme, under the condition that the battery needs to be heated, the first motor controller is electrically connected with the vehicle-mounted charger, the first motor controller and the vehicle-mounted charger are controlled to carry out charge and discharge energy exchange on the first power battery and the second power battery, heat generated in the charge and discharge energy exchange process is transferred to the power battery through the water channel pipeline, so that the battery is heated without the help of PTC, and cost and resources can be saved.
Optionally, step 82 may include the steps of:
controlling a first motor controller to perform inversion discharge on a first power battery to obtain first alternating current, and controlling a vehicle-mounted charger to charge a second power battery by using the first alternating current; or,
and controlling the vehicle-mounted charger to perform inversion discharge on the second power battery to obtain second alternating current, and controlling the first motor controller to charge the first power battery by using the second alternating current.
Optionally, the controlling the first motor controller to perform inverse discharge on the first power battery to obtain a first alternating current includes:
under the condition that the electric quantity of the first power battery is full or the electric quantity of the first power battery is higher than that of the second power battery, controlling the first motor controller to perform inversion discharge on the first power battery; or,
controlling the vehicle-mounted charger to perform inverse discharge on the second power battery to obtain second alternating current, and the method comprises the following steps:
and controlling the vehicle-mounted charger to perform inversion discharge on the second power battery under the condition that the second power battery is full or the electric quantity of the second power battery is higher than that of the first power battery.
Optionally, the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger, and a first contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is started, controlling the first switch and the second switch to be connected to the first contact so as to electrically connect the first motor controller with the vehicle-mounted charger.
Optionally, the battery heating system further comprises a first motor, and the connection switch is arranged between the first motor and the first motor controller and used for electrically connecting the first motor and the first motor controller;
the method further comprises the following steps:
when the vehicle is in a running state, the first motor and the first motor controller are electrically connected through the connecting switch, and power is provided for the vehicle through the first motor.
Through the scheme, the heating of the battery can be realized, the power required by running can be provided for the vehicle, so that the vehicle battery can be heated in the running process of the vehicle, the motor is driven and the battery is heated at the same time, and the speed of heating the battery can be further accelerated.
Optionally, the connection switch is provided with a first switch connected with the first motor controller, a third switch connected with the first motor, and a first contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is started and the vehicle is in a running state, controlling the first switch and the third switch to be connected to the first contact so as to electrically connect the first motor and the first motor controller.
Optionally, the connection switch is further provided with a second contact connected with the first contact;
controlling the first switch and the third switch to be connected to the first contact, comprising:
controlling a first switch to be connected to the first contact; and the number of the first and second groups,
and controlling the third switch to be connected to the second contact so that the third switch is connected with the first contact through the second contact.
Optionally, the battery heating system further comprises a first motor and a vehicle-mounted charging port, and the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger, a third switch connected with the first motor, a third contact connected with the vehicle-mounted charging port, and a fourth contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is not started, controlling the second switch to be connected to the third contact, and controlling the first switch and the third switch to be respectively connected to the fourth contact so as to provide power for the vehicle through the first motor and/or charge the vehicle through the vehicle-mounted charging port.
Through the scheme, under the condition that the vehicle battery is not required to be heated, the vehicle can be driven through the motor, the required power is provided for the vehicle, and the vehicle battery can be charged through the vehicle-mounted charging port.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (16)
1. A battery heating system, comprising: the vehicle-mounted charging device comprises a first power battery, a second power battery, a first motor controller connected with the first power battery, a connecting switch, a vehicle-mounted charging machine connected with the second power battery, a water path pipeline and a controller, wherein the connecting switch is arranged between the first motor controller and the vehicle-mounted charging machine and used for realizing the electric connection of the first motor controller and the vehicle-mounted charging machine, and the water path pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charging machine;
the controller is used for controlling the first motor controller and the vehicle-mounted charger to perform charging and discharging energy exchange on the first power battery and the second power battery when the first motor controller is electrically connected with the vehicle-mounted charger, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the waterway pipeline.
2. The battery heating system according to claim 1, wherein the controller is configured to, when the first motor controller is electrically connected to the vehicle-mounted charger, control the first motor controller to perform inverse discharge on the first power battery to obtain a first alternating current, and control the vehicle-mounted charger to charge the second power battery with the first alternating current; or,
the controller is used for controlling the vehicle-mounted charger to perform inverted discharge on the second power battery to obtain second alternating current when the first motor controller is electrically connected with the vehicle-mounted charger, and controlling the first motor controller to charge the first power battery by using the second alternating current.
3. The battery heating system according to claim 2, wherein the controller is configured to control the first motor controller to perform inverse discharge on the first power battery when the first power battery is full or the first power battery is higher than the second power battery; or the controller is used for controlling the vehicle-mounted charger to perform inverse discharge on the second power battery under the condition that the second power battery is full or the electric quantity of the second power battery is higher than that of the first power battery.
4. The battery heating system according to claim 1, wherein the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger, and a first contact;
the controller is used for controlling the first switch and the second switch to be connected to the first contact under the condition that the heating function of the battery heating system is started, so that the first motor controller is electrically connected with the vehicle-mounted charger.
5. The battery heating system of claim 1, further comprising a first motor, wherein the connection switch is disposed between the first motor and the first motor controller for electrically connecting the first motor and the first motor controller;
the controller is used for electrically connecting the first motor and the first motor controller through the connecting switch when the vehicle is in a running state, and providing power for the vehicle through the first motor.
6. The battery heating system according to claim 5, wherein the connection switch is provided with a first switch connected to the first motor controller, a third switch connected to the first motor, and a first contact;
the controller is configured to control the first switch and the third switch to be connected to the first contact so that the first motor and the first motor controller are electrically connected when a heating function of the battery heating system is turned on and the vehicle is in a driving state.
7. The battery heating system according to claim 6, wherein the connection switch is further provided with a second contact connected with the first contact;
the controller is used for controlling the third switch to be connected to the second contact point so that the third switch is connected with the first contact point through the second contact point.
8. The battery heating system according to claim 1, further comprising a first motor and an onboard charging port, wherein the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the onboard charger, a third switch connected with the first motor, a third contact connected with the onboard charging port, and a fourth contact;
the controller is used for controlling the second switch to be connected to the third contact point and controlling the first switch and the third switch to be connected to the fourth contact point respectively under the condition that the heating function of the battery heating system is not started so as to provide power for a vehicle through the first motor and/or charge the vehicle through the vehicle-mounted charging port.
9. A battery heating method of a battery heating system, the battery heating system comprising: the method is characterized by comprising a first power battery, a second power battery, a first motor controller connected with the first power battery, a connecting switch, a vehicle-mounted charger connected with the second power battery, a water path pipeline and a controller, wherein the connecting switch is arranged between the first motor controller and the vehicle-mounted charger and used for realizing the electric connection of the first motor controller and the vehicle-mounted charger, the water path pipeline passes through the first power battery, the second power battery, the first motor controller and the vehicle-mounted charger, and the method is applied to the controller and comprises the following steps:
when the first motor controller is electrically connected with the vehicle-mounted charger, the first motor controller and the vehicle-mounted charger are controlled to exchange charging and discharging energy of the first power battery and the second power battery, so that heat generated by the first motor controller and the vehicle-mounted charger in the charging and discharging energy exchange process is transferred to the first power battery and the second power battery through the waterway pipeline.
10. The method according to claim 9, wherein the controlling the first motor controller and the vehicle-mounted charger to exchange charge and discharge energy between the first power battery and the second power battery comprises:
controlling the first motor controller to perform inversion discharge on the first power battery to obtain first alternating current, and controlling the vehicle-mounted charger to charge the second power battery by using the first alternating current; or,
and controlling the vehicle-mounted charger to perform inversion discharge on the second power battery to obtain second alternating current, and controlling the first motor controller to charge the first power battery by using the second alternating current.
11. The method according to claim 10, wherein the controlling the first motor controller to perform inverse discharge on the first power battery to obtain a first alternating current comprises:
under the condition that the electric quantity of the first power battery is full or the electric quantity of the first power battery is higher than that of the second power battery, controlling the first motor controller to perform inverse discharge on the first power battery; or,
the control on-vehicle machine that charges to the second power battery contravariant discharges, obtains the second alternating current, includes:
and under the condition that the second power battery is full or the electric quantity of the second power battery is higher than that of the first power battery, controlling the vehicle-mounted charger to perform inverse discharge on the second power battery.
12. The method according to claim 9, characterized in that the connection switch is provided with a first switch connected with the first motor controller, a second switch connected with the vehicle-mounted charger and a first contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is started, controlling the first switch and the second switch to be connected to the first contact so as to electrically connect the first motor controller with the vehicle-mounted charger.
13. The method of claim 9, wherein the battery heating system further comprises a first motor, the connection switch disposed between the first motor and the first motor controller for effecting electrical connection of the first motor and the first motor controller;
the method further comprises the following steps:
when the vehicle is in a running state, the first motor and the first motor controller are electrically connected through the connecting switch, and power is provided for the vehicle through the first motor.
14. The method according to claim 13, wherein the connection switch is provided with a first switch connected with the first motor controller, a third switch connected with the first motor, and a first contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is started and the vehicle is in a running state, controlling the first switch and the third switch to be connected to the first contact point so as to electrically connect the first motor and the first motor controller.
15. The method according to claim 14, wherein the connection switch is further provided with a second contact connected with the first contact;
the controlling the first switch and the third switch to be connected to the first contact includes:
controlling the first switch to be connected to the first contact; and the number of the first and second groups,
controlling the third switch to connect to the second contact such that the third switch connects with the first contact through the second contact.
16. The method of claim 9, wherein the battery heating system further comprises a first motor and an onboard charging port, the connection switch being provided with a first switch connected to the first motor controller, a second switch connected to the onboard charger, a third switch connected to the first motor, a third contact connected to the onboard charging port, and a fourth contact;
the method further comprises the following steps:
and under the condition that the heating function of the battery heating system is not started, controlling the second switch to be connected to the third contact, and controlling the first switch and the third switch to be respectively connected to the fourth contact so as to provide power for the vehicle through the first motor and/or charge the vehicle through the vehicle-mounted charging port.
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| CN113871757B (en) | 2024-09-10 |
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