CN216563315U - Battery heating device and vehicle - Google Patents
Battery heating device and vehicle Download PDFInfo
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- CN216563315U CN216563315U CN202122399384.7U CN202122399384U CN216563315U CN 216563315 U CN216563315 U CN 216563315U CN 202122399384 U CN202122399384 U CN 202122399384U CN 216563315 U CN216563315 U CN 216563315U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a battery heating device and a vehicle, and belongs to the technical field of battery heating. The battery heating device comprises a charging interface, a first switching tube, a fifth switching tube, a second switching tube, a fourth switching tube, a third switching tube and a sixth switching tube; the first switching tube, the second switching tube and the third switching tube are connected in series on the first branch; the fourth switching tube, the fifth switching tube and the sixth switching tube are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are used for connecting two ends of a battery; an oscillation branch circuit is arranged between the drain electrode of the third switching tube and the source electrode of the sixth switching tube; one end of the charging interface is connected between the switch tubes on the first branch, and the other end of the charging interface is connected between the switch tubes on the second branch. When the electric quantity of the battery is insufficient, the charging power supply is connected through the charging interface, and the internal heating through the charging/discharging of the battery is realized by switching the conduction states of the second group of switching tubes and the third group of switching tubes.
Description
Technical Field
The utility model relates to a battery heating device and a vehicle, and belongs to the technical field of battery heating.
Background
With the development of new energy vehicles and energy storage technologies, power battery technologies are also continuously advancing. Power battery systems are also becoming more widely used in the automotive field. The lithium ion battery pack is internally connected by a plurality of lithium ion cells through a series-parallel structure, and outputs voltage, current and electric quantity required by a system. Lithium ion batteries have poor low-temperature characteristics, poor discharging power at low temperature, and lithium precipitation caused by continuous charging below 0 ℃ generally, so that a great safety risk exists. Therefore, how to quickly save energy to realize battery heating becomes a key work for battery pack research.
The existing heating system is generally divided into a battery external heating system and a battery self-heating system, the prior art of the external heating system is mature and is more applied to the problems of hot air heating, heating film (plate) heating, liquid cooling cold plate heating and immersion heating, and the technology needs to gradually heat from the shell of the battery core to the interior of the battery core, so that the internal temperature of the battery is low and the external surface temperature is high; the battery internal heating is a newly researched common mode in the direction, and comprises a third pole heating scheme for adding a heating structure in the battery, a battery instant short circuit heating scheme, an external alternating current power supply heating scheme and a high-frequency oscillation self-heating scheme, wherein the other heating schemes except a built-in heating element in the third pole scheme adopt the principle that current generates heat after passing through the internal resistance of the battery, the heat is generated uniformly, and a heat source is generated in the battery, so that the heating efficiency is greatly improved without external conduction.
Particularly, the high-frequency oscillation self-heating scheme can realize the heating of the battery pack by using an electric control system of a motor of the whole vehicle without adding additional equipment, and becomes the key point of the current research. For example: the utility model discloses a chinese utility model patent document of grant publication No. CN 213816258U, this patent document disclose a low temperature battery pack heating device based on LC resonance, and this heating device switches on and turn-off through controlling two sets of MOS pipes, and battery pack carries out pulse discharge for battery pack internal resistance generates heat, has realized battery pack's heating.
However, the heating of the battery assembly of the above patent document is achieved based on the pulse discharge of the battery assembly, which results in that the battery assembly cannot be heated in the case of an excessively low capacity or low temperature state.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a battery heating device for solve battery power and hang down and can't the problem of heating.
In order to achieve the above object, the present application provides a technical solution of a battery heating device, which includes three groups of switch tubes and a charging interface:
the first group of switching tubes comprises a first switching tube and a fifth switching tube; the conduction directions of the first switching tube and the fifth switching tube are the same;
the second group of switching tubes comprises a second switching tube and a fourth switching tube; the conduction directions of the second switching tube and the fourth switching tube are the same and are opposite to the conduction directions of the first switching tube and the fifth switching tube;
the third group of switching tubes comprises a third switching tube and a sixth switching tube; the conduction directions of the third switching tube and the sixth switching tube are the same and are opposite to the conduction directions of the second switching tube and the fourth switching tube;
parasitic diodes are arranged in the first group of switching tubes and the second group of switching tubes; the first switching tube, the second switching tube and the third switching tube are connected in series on the first branch; the fourth switching tube, the fifth switching tube and the sixth switching tube are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are used for connecting two ends of a battery; an oscillation branch circuit is arranged between the drain electrode of the third switching tube and the source electrode of the sixth switching tube; one end of the charging interface is connected between the switch tubes on the first branch, and the other end of the charging interface is connected between the switch tubes on the second branch.
The technical scheme of the battery heating device has the beneficial effects that: the battery heating device is provided with three groups of switch tubes and a charging interface, when the electric quantity of the battery is sufficient, the internal heating through the self-discharging of the battery is realized by switching the conduction states of the first group of switch tubes and the third group of switch tubes, when the electric quantity of the battery is insufficient or at low temperature, the external charging power supply is connected through the charging interface, and the internal heating through the charging/discharging of the battery is realized by switching the conduction states of the second group of switch tubes and the third group of switch tubes.
Furthermore, the drain electrode of the first switching tube is used for connecting the anode of the battery, the source electrode of the first switching tube is connected with the source electrode of the second switching tube, the drain electrode of the second switching tube is connected with the drain electrode of the third switching tube, and the source electrode of the third switching tube is used for connecting the cathode of the battery; the drain electrode of the sixth switching tube is used for connecting the anode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is used for connecting the cathode of the battery; the positive electrode of the charging interface is connected with the drain electrode of the second switch tube, and the negative electrode of the charging interface is connected with the drain electrode of the fifth switch tube.
Furthermore, the source electrode of the second switching tube is used for connecting the anode of the battery, the drain electrode of the second switching tube is connected with the drain electrode of the first switching tube, the source electrode of the first switching tube is connected with the drain electrode of the third switching tube, and the source electrode of the third switching tube is used for connecting the cathode of the battery; the drain electrode of the sixth switching tube is used for connecting the anode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is used for connecting the cathode of the battery; the positive pole of the interface that charges is connected the drain electrode of second switch tube, and the negative pole of the interface that charges is connected the source electrode of fifth switch tube, be provided with relay switch on the oscillation branch road.
Further, the oscillating branch comprises a capacitor and an inductor which are connected in series.
Furthermore, each switch tube is an MOS tube.
In addition, this application has still provided the technical scheme of a vehicle, including vehicle body, battery and battery heating device, battery heating device includes three switch tubes of group and the interface that charges:
the first group of switching tubes comprises a first switching tube and a fifth switching tube; the conduction directions of the first switching tube and the fifth switching tube are the same;
the second group of switching tubes comprises a second switching tube and a fourth switching tube; the conduction directions of the second switching tube and the fourth switching tube are the same and are opposite to the conduction directions of the first switching tube and the fifth switching tube;
the third group of switching tubes comprises a third switching tube and a sixth switching tube; the conduction directions of the third switching tube and the sixth switching tube are the same and are opposite to the conduction directions of the second switching tube and the fourth switching tube;
parasitic diodes are arranged in the first group of switching tubes and the second group of switching tubes; the first switching tube, the second switching tube and the third switching tube are connected in series on the first branch; the fourth switching tube, the fifth switching tube and the sixth switching tube are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are connected with two ends of the battery; an oscillation branch circuit is arranged between the drain electrode of the third switching tube and the source electrode of the sixth switching tube; one end of the charging interface is connected between the switch tubes on the first branch, and the other end of the charging interface is connected between the switch tubes on the second branch.
The technical scheme of the vehicle has the beneficial effects that: the battery heating device in the vehicle is provided with three groups of switch tubes and a charging interface, when the electric quantity of the battery is sufficient, the internal heating through self-discharging of the battery is realized by switching the conduction states of the first group of switch tubes and the third group of switch tubes, when the electric quantity of the battery is insufficient or in a low-temperature state, the external charging power supply is connected through the charging interface, and the internal heating through charging/discharging of the battery is realized by switching the conduction states of the second group of switch tubes and the third group of switch tubes.
Furthermore, the drain electrode of the first switching tube is connected with the anode of the battery, the source electrode of the first switching tube is connected with the source electrode of the second switching tube, the drain electrode of the second switching tube is connected with the drain electrode of the third switching tube, and the source electrode of the third switching tube is connected with the cathode of the battery; the drain electrode of the sixth switching tube is connected with the positive electrode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is connected with the negative electrode of the battery; the positive electrode of the charging interface is connected with the drain electrode of the second switch tube, and the negative electrode of the charging interface is connected with the drain electrode of the fifth switch tube.
Furthermore, the source electrode of the second switching tube is connected with the anode of the battery, the drain electrode of the second switching tube is connected with the drain electrode of the first switching tube, the source electrode of the first switching tube is connected with the drain electrode of the third switching tube, and the source electrode of the third switching tube is connected with the cathode of the battery; the drain electrode of the sixth switching tube is connected with the positive electrode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is connected with the negative electrode of the battery; the positive pole of the interface that charges is connected the drain electrode of second switch tube, and the negative pole of the interface that charges is connected the source electrode of fifth switch tube, be provided with relay switch on the oscillation branch road.
Further, the oscillating branch comprises a capacitor and an inductor which are connected in series.
Furthermore, each switch tube is an MOS tube.
Drawings
Fig. 1 is a schematic circuit diagram of a battery heating apparatus according to embodiment 1 of the present invention;
fig. 2 is a schematic circuit diagram of embodiment 2 of the battery heating apparatus of the present invention.
Detailed Description
Vehicle embodiment 1:
the vehicle provided by the embodiment comprises a vehicle body, a battery and a battery heating device as shown in fig. 1, wherein the battery heating device comprises a high-frequency heating device and a charging interface (namely a direct-current charger interface), and the high-frequency heating device comprises three groups of switching tubes.
The first group of switching tubes comprises a first switching tube (switching tube S1) and a fifth switching tube (switching tube S5); the second group of switching tubes comprises a second switching tube (switching tube S2) and a fourth switching tube (switching tube S4); the third group of switching tubes comprises a third switching tube (switching tube S3) and a sixth switching tube (switching tube S6); the switch tube S1 and the switch tube S5 have the same conduction direction; the switch tube S2 and the switch tube S4 are conducted in the same direction, and opposite to the conduction directions of the switch tube S1 and the switch tube S5; the switch tube S3 and the switch tube S6 are conducted in the same direction, and opposite to the conduction directions of the switch tube S2 and the switch tube S4.
The switching tube S1, the switching tube S2, the switching tube S3, the switching tube S4, the switching tube S5 and the switching tube S6 all adopt N-channel MOS tubes and parasitic diodes.
The switching tube S1, the switching tube S2 and the switching tube S3 are connected in series on a first branch, the switching tube S4, the switching tube S5 and the switching tube S6 are connected in series on a second branch, and an oscillation branch is arranged between the drain of the switching tube S3 and the source of the switching tube S6; the positive pole of the interface that charges is connected between the switch tube on the first branch road, and the negative pole of the interface that charges is connected between the switch tube on the second branch road.
Specifically, the drain of the switching tube S1 is connected to the positive electrode of the battery, the source of the switching tube S1 is connected to the source of the switching tube S2, the drain of the switching tube S2 is connected to the drain of the switching tube S3, and the source of the switching tube S3 is connected to the negative electrode of the battery; the drain electrode of the switch tube S6 is connected with the positive electrode of the battery, the source electrode of the switch tube S6 is connected with the drain electrode of the switch tube S5, the source electrode of the switch tube S5 is connected with the source electrode of the switch tube S4, and the drain electrode of the switch tube S4 is connected with the negative electrode of the battery; the positive electrode of the charging interface is connected with the drain electrode of the switch tube S2, and the negative electrode of the charging interface is connected with the drain electrode of the switch tube S5. The oscillating branch comprises a capacitor and an inductor which are connected in series.
The source electrode and the drain electrode of the switch tube are both the source electrode and the drain electrode of the N-channel MOS tube.
The working process of the battery heating device comprises two conditions of no external power supply and external power supply, and the detailed process is described as follows.
Under the condition of no external power supply, when charging interface vacant no current voltage input was in the state of opening circuit also, control first group switch tube and third group switch tube and switch on in turn, the second group switch was in the closure state this moment, also switch tube S2 and switch tube S4 switched on:
when the first group of switching tubes is turned on, the third group of switching tubes is turned off, that is, the switching tube S1 and the switching tube S5 are turned on, and the switching tube S3 and the switching tube S6 are turned off, the current of the battery flows along the positive electrode of the battery, the switching tube S1, the switching tube S2, the capacitor, the inductor, the switching tube S5 and the switching tube S4, and finally returns to the negative electrode of the battery; in the state, the current is gradually increased from small to small and then gradually decreased due to the action of the inductor, and the current is 0 after the capacitor is fully charged due to the existence of the capacitor, and then the current reversely flows due to the counter potential formed by the existence of the inductor, and the current is gradually 0 from small to large in the process;
when the first group of switching tubes is turned off, the third group of switching tubes is turned on, that is, the switching tube S1 and the switching tube S5 are turned off, and the switching tube S3 and the switching tube S6 are turned on, the current of the battery flows along the positive electrode of the battery, the switching tube S6, the capacitor, the inductor and the switching tube S4, and finally returns to the negative electrode of the battery; in this state, the current gradually increases from small to small and then gradually decreases, and finally the current is 0 after the capacitor is fully charged due to the existence of the capacitor, and then the current reversely flows due to the existence of the inductor to form a counter potential, and the current gradually increases from small to large and then gradually becomes 0 from large to small in the process;
the conduction states of the group of switching tubes and the third group of switching tubes are continuously and alternately controlled, and the rapid alternating current can be formed on the battery by circulation, so that the internal resistance of the battery continuously generates heat, and the purpose of heating the battery is realized.
Under the condition that has external power supply, also charge the interface connection and fill electric pile, the interface that charges has the input of current-voltage, and control second group switch tube and the second switch tube of group switch tube switch on in turn, and the first switch tube of group of simultaneous control is closed, also switches on switch tube S1 and switch tube S5:
when the second group of switch tubes is turned on, the third group of switch tubes is turned off, that is, the switch tube S2 and the switch tube S4 are turned on, and the switch tube S3 and the switch tube S6 are turned off, the charging current of the charging interface returns to the negative electrode of the charging interface along the positive electrode of the charging interface, the switch tube S2, the switch tube S1, the battery, the switch tube S4, and the switch tube S5; in this state, the positive and negative poles of the charging interface correspond to the positive and negative poles of the battery to charge the battery;
when the second group of switching tubes is disconnected, the third group of switching tubes is connected, that is, the switching tube S2 is disconnected with the switching tube S4, and the switching tube S3 is connected with the switching tube S6, the discharging current of the battery returns to the negative electrode of the battery along the positive electrode of the battery, the switching tube S6, the negative electrode of the charging interface, the positive electrode of the charging interface, and the switching tube S3; in this state, the positive and negative electrodes of the charging interface are opposite to the positive and negative electrodes of the battery, which is equivalent to the discharge of the battery;
and continuously and alternately controlling the conduction states of the second group of switching tubes and the third group of switching tubes to enable the voltages applied to the two ends of the battery to be in a high-frequency alternating-current state, so that the battery is switched between rapid charging and discharging, and the internal resistance of the battery generates heat to heat the battery.
In the above embodiment, in order to reduce the power consumption in the heating process, the oscillation branch includes an inductor and a capacitor connected in series, and as another implementation, a heating resistor may also be connected in series on the oscillation branch for external heating of the battery.
In the above embodiment, the switching tube is an N-channel MOS tube, and as another embodiment, another switching tube such as a P-channel MOS tube or an IGBT may also be used, which is not limited in the present invention.
The utility model realizes the heating in the battery with low electric quantity by the external power supply under the condition that the electric quantity of the battery is lower.
Battery heating apparatus example 1:
the specific structure, connection relationship and operation process of the battery heating device are described in the above vehicle embodiment 1, and are not described herein.
Vehicle embodiment 2:
the vehicle provided by the embodiment comprises a vehicle body, a battery and a battery heating device as shown in fig. 2, wherein the battery heating device comprises a high-frequency heating device and a charging interface (namely a direct-current charger interface), and the high-frequency heating device comprises three groups of switching tubes.
The specific structure and the conducting direction of each group of switching tubes are the same as those in embodiment 1, and are not described herein. The difference from embodiment 1 lies in the connection relationship of the circuits.
The connection relationship of the present embodiment is as follows:
the source electrode of the switch tube S2 is connected with the positive electrode of the battery, the drain electrode of the switch tube S2 is connected with the drain electrode of the switch tube S1, the source electrode of the switch tube S1 is connected with the drain electrode of the switch tube S3, and the source electrode of the switch tube S3 is connected with the negative electrode of the battery; the drain electrode of the switch tube S6 is connected with the positive electrode of the battery, the source electrode of the switch tube S6 is connected with the drain electrode of the switch tube S5, the source electrode of the switch tube S5 is connected with the source electrode of the switch tube S4, and the drain electrode of the switch tube S4 is connected with the negative electrode of the battery; the positive pole of the interface that charges connects the drain electrode of switch tube S2, and the negative pole of the interface that charges connects the source electrode of switch tube S5, is provided with relay switch on the oscillation branch road.
The source electrode and the drain electrode of the switch tube are both the source electrode and the drain electrode of the N-channel MOS tube.
The working process of the battery heating device of the embodiment includes two situations of no external power supply and external power supply, and the detailed process is described as follows.
The relay switch is controlled to be closed under the condition that no external power supply exists, the specific working process is the same as that of the embodiment 1, and details are not repeated here.
Under the condition that has external power supply, also charge the interface connection and fill electric pile, the interface that charges has current-voltage's the input time, and control second group switch tube and the switch tube of third group switch on in turn, and the switch tube of the first group of simultaneous control switches on, control relay switch disconnection:
when the second group of switch tubes is turned on, the third group of switch tubes is turned off, that is, the switch tube S2 and the switch tube S4 are turned on, and the switch tube S3 and the switch tube S6 are turned off, the charging current of the charging interface returns to the negative electrode of the charging interface along the positive electrode of the charging interface, the switch tube S2, the battery, and the switch tube S4 (since the relay switch is in an off state, the current does not return to the negative electrode of the charging interface from the positive electrode of the charging interface through the switch tube S1, the capacitor, the inductor and the switch tube S5); in this state, the positive and negative poles of the charging interface correspond to the positive and negative poles of the battery to charge the battery;
when the second group of switching tubes is disconnected, the third group of switching tubes is connected, that is, the switching tube S2 and the switching tube S4 are disconnected, and the switching tube S3 and the switching tube S6 are connected, the discharging current of the battery returns to the negative electrode of the battery along the positive electrode of the battery, the switching tube S6, the switching tube S5, the negative electrode of the charging interface, the positive electrode of the charging interface, the switching tube S1 and the switching tube S3; in this state, the positive and negative electrodes of the charging interface are opposite to the positive and negative electrodes of the battery, which is equivalent to the discharge of the battery;
the conduction states of the second group of switching tubes and the third group of switching tubes are continuously and alternately controlled, so that the voltages applied to the two ends of the battery are in a high-frequency alternating-current state, the battery is further switched to be charged and discharged quickly, and the internal resistance of the battery is caused to generate heat, so that the purpose of heating the battery is achieved.
The expansion manner and the resulting effect of this embodiment are the same as those of embodiment 1, and are not described herein.
Battery heating apparatus example 2:
the specific structure, connection relationship and operation process of the battery heating device are described in the above vehicle embodiment 2, and are not described herein.
Claims (10)
1. The utility model provides a battery heating device which characterized in that, includes three switch tubes of group and the interface that charges:
the first group of switching tubes comprises a first switching tube and a fifth switching tube; the conduction directions of the first switching tube and the fifth switching tube are the same;
the second group of switching tubes comprises a second switching tube and a fourth switching tube; the conduction directions of the second switching tube and the fourth switching tube are the same and are opposite to the conduction directions of the first switching tube and the fifth switching tube;
the third group of switching tubes comprises a third switching tube and a sixth switching tube; the conduction directions of the third switching tube and the sixth switching tube are the same and are opposite to the conduction directions of the second switching tube and the fourth switching tube;
parasitic diodes are arranged in the first group of switching tubes and the second group of switching tubes; the first switching tube, the second switching tube and the third switching tube are connected in series on the first branch; the fourth switching tube, the fifth switching tube and the sixth switching tube are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are used for connecting two ends of a battery; an oscillation branch circuit is arranged between the drain electrode of the third switching tube and the source electrode of the sixth switching tube; one end of the charging interface is connected between the switch tubes on the first branch, and the other end of the charging interface is connected between the switch tubes on the second branch.
2. The battery heating device according to claim 1, wherein the drain electrode of the first switching tube is used for connecting the positive electrode of the battery, the source electrode of the first switching tube is connected with the source electrode of the second switching tube, the drain electrode of the second switching tube is connected with the drain electrode of the third switching tube, and the source electrode of the third switching tube is used for connecting the negative electrode of the battery; the drain electrode of the sixth switching tube is used for connecting the anode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is used for connecting the cathode of the battery; the positive electrode of the charging interface is connected with the drain electrode of the second switch tube, and the negative electrode of the charging interface is connected with the drain electrode of the fifth switch tube.
3. The battery heating device according to claim 1, wherein the source electrode of the second switching tube is connected to the positive electrode of the battery, the drain electrode of the second switching tube is connected to the drain electrode of the first switching tube, the source electrode of the first switching tube is connected to the drain electrode of the third switching tube, and the source electrode of the third switching tube is connected to the negative electrode of the battery; the drain electrode of the sixth switching tube is used for connecting the anode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is used for connecting the cathode of the battery; the positive pole of the interface that charges is connected the drain electrode of second switch tube, and the negative pole of the interface that charges is connected the source electrode of fifth switch tube, be provided with relay switch on the oscillation branch road.
4. The battery heating apparatus of claim 1, wherein the oscillating branch comprises a capacitor and an inductor in series.
5. The battery heating apparatus according to claim 1, wherein each of the switching tubes is a MOS tube.
6. The utility model provides a vehicle, includes vehicle body, battery and battery heating device, its characterized in that, battery heating device include three switch tubes of group and the interface that charges:
the first group of switching tubes comprises a first switching tube and a fifth switching tube; the conduction directions of the first switching tube and the fifth switching tube are the same;
the second group of switching tubes comprises a second switching tube and a fourth switching tube; the conduction directions of the second switching tube and the fourth switching tube are the same and are opposite to the conduction directions of the first switching tube and the fifth switching tube;
the third group of switching tubes comprises a third switching tube and a sixth switching tube; the conduction directions of the third switching tube and the sixth switching tube are the same and are opposite to the conduction directions of the second switching tube and the fourth switching tube;
parasitic diodes are arranged in the first group of switching tubes and the second group of switching tubes; the first switching tube, the second switching tube and the third switching tube are connected in series on the first branch; the fourth switching tube, the fifth switching tube and the sixth switching tube are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are connected with two ends of the battery; an oscillation branch circuit is arranged between the drain electrode of the third switching tube and the source electrode of the sixth switching tube; one end of the charging interface is connected between the switch tubes on the first branch, and the other end of the charging interface is connected between the switch tubes on the second branch.
7. The vehicle of claim 6, characterized in that the drain electrode of the first switching tube is connected with the positive electrode of the battery, the source electrode of the first switching tube is connected with the source electrode of the second switching tube, the drain electrode of the second switching tube is connected with the drain electrode of the third switching tube, and the source electrode of the third switching tube is connected with the negative electrode of the battery; the drain electrode of the sixth switching tube is connected with the positive electrode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is connected with the negative electrode of the battery; the positive electrode of the charging interface is connected with the drain electrode of the second switch tube, and the negative electrode of the charging interface is connected with the drain electrode of the fifth switch tube.
8. The vehicle of claim 6, characterized in that the source of the second switching tube is connected with the positive electrode of the battery, the drain of the second switching tube is connected with the drain of the first switching tube, the source of the first switching tube is connected with the drain of the third switching tube, and the source of the third switching tube is connected with the negative electrode of the battery; the drain electrode of the sixth switching tube is connected with the positive electrode of the battery, the source electrode of the sixth switching tube is connected with the drain electrode of the fifth switching tube, the source electrode of the fifth switching tube is connected with the source electrode of the fourth switching tube, and the drain electrode of the fourth switching tube is connected with the negative electrode of the battery; the positive pole of the interface that charges is connected the drain electrode of second switch tube, and the negative pole of the interface that charges is connected the source electrode of fifth switch tube, be provided with relay switch on the oscillation branch road.
9. The vehicle of claim 6, characterized in that the oscillating branch comprises a capacitance and an inductance in series.
10. The vehicle of claim 6, characterized in that each switching tube is a MOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122399384.7U CN216563315U (en) | 2021-09-30 | 2021-09-30 | Battery heating device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122399384.7U CN216563315U (en) | 2021-09-30 | 2021-09-30 | Battery heating device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216563315U true CN216563315U (en) | 2022-05-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122399384.7U Active CN216563315U (en) | 2021-09-30 | 2021-09-30 | Battery heating device and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216563315U (en) |
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2021
- 2021-09-30 CN CN202122399384.7U patent/CN216563315U/en active Active
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