CN218731293U - Battery self-heating circuit and vehicle - Google Patents
Battery self-heating circuit and vehicle Download PDFInfo
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- CN218731293U CN218731293U CN202222906259.5U CN202222906259U CN218731293U CN 218731293 U CN218731293 U CN 218731293U CN 202222906259 U CN202222906259 U CN 202222906259U CN 218731293 U CN218731293 U CN 218731293U
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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 self-heating circuit and vehicle, this battery self-heating circuit includes power module, heating control switch, first group battery, second group battery and winding, the first end of power module loops through the winding, the heating control switch is connected with the positive pole of first group battery; the second end of the power module is connected with the anode of the second battery pack; the third end of the power module is respectively connected with the negative electrode of the first battery pack and the negative electrode of the second battery pack; the power module is used for enabling an oscillating current to be formed among the first battery pack, the winding and the second battery pack when the heating control switch is closed so as to heat the first battery pack and the second battery pack. This openly can reduce the heating cost, promotes heating efficiency.
Description
Technical Field
The disclosure relates to the technical field of batteries, in particular to a battery self-heating circuit and a vehicle.
Background
The power battery is used as a power energy source of the electric automobile and has direct influence on the use performance of the automobile. However, when the power battery is in a low-temperature environment below-10 ℃, the charge and discharge performance of the power battery is greatly reduced due to the reduction of the activities of the anode and cathode materials and the electrolyte of the power battery. Therefore, the power battery must be heated to raise the temperature of the power battery, so as to ensure the normal use of the electric automobile under cold conditions.
In the related art, it is common to employ a scheme of externally heating the battery. However, in the external heating scheme, the battery heater is adopted to heat the battery pack, so that the high-voltage system of the whole vehicle needs to additionally distribute power to the battery heater, and meanwhile, a water channel or a wind channel, a pipeline, a low-voltage system and the like need to be distributed.
SUMMERY OF THE UTILITY MODEL
An object of the present disclosure is to provide a battery self-heating circuit and a vehicle, so as to solve the problems in the related art.
In order to achieve the above object, in a first aspect of the embodiments of the present disclosure, there is provided a battery self-heating circuit including a power module, a heating control switch, a first battery pack, a second battery pack, and a winding,
the first end of the power module is connected with the anode of the first battery pack sequentially through the winding and the heating control switch;
the second end of the power module is connected with the anode of the second battery pack;
the third end of the power module is respectively connected with the negative electrode of the first battery pack and the negative electrode of the second battery pack;
the power module is used for enabling the first battery pack, the winding and the second battery pack to form oscillating current when the heating control switch is closed so as to heat the first battery pack and the second battery pack.
Optionally, the power module comprises a bridge arm switch,
the first end of the winding is connected between an upper bridge arm switch tube and a lower bridge arm switch tube of the bridge arm switch, and the second end of the winding is connected with the heating control switch;
the upper bridge arm switching tube is connected with the anode of the second battery pack;
and the lower bridge arm switching tube is respectively connected with the negative electrode of the first battery pack and the negative electrode of the second battery pack.
Optionally, the winding is a multi-phase winding, and the bridge arm switch is a multi-phase bridge arm corresponding to the multi-phase winding.
Optionally, the multi-phase coils of the motor are multiplexed as the multi-phase windings, and the multi-phase bridge arm of the motor controller is multiplexed as the multi-phase bridge arm.
Optionally, the motor includes a driving motor or an air conditioner compressor, and the motor controller includes a motor controller corresponding to the driving motor or a motor controller corresponding to the air conditioner compressor.
Optionally, the battery pack further comprises a parallel switch, the anode of the first battery pack is connected with the anode of the second battery pack through the parallel switch,
the parallel switch is used for selectively using the second battery pack to supply power to the winding when the heating control switch is switched off, or selectively using the first battery pack and the second battery pack to supply power to the winding.
Optionally, a difference between the supply voltage of the first battery pack and the supply voltage of the second battery pack does not exceed a preset threshold.
Alternatively, the second battery pack may include a plurality of second sub-batteries connected in parallel with each other.
In a second aspect of the embodiments of the present disclosure, there is provided a vehicle including a vehicle body and the battery self-heating circuit of the first aspect, the battery self-heating circuit being provided in the vehicle body.
The utility model provides a battery self-heating circuit and vehicle, include through this battery self-heating circuit: the power module, the heating control switch, the first battery pack, the second battery pack and the winding are sequentially connected, wherein the first end of the power module is connected with the anode of the first battery pack through the winding and the heating control switch; the second end of the power module is connected with the anode of the second battery pack; and the third end of the power module is respectively connected with the negative electrode of the first battery pack and the negative electrode of the second battery pack. When the battery needs to be heated, the power module can enable the first battery pack, the winding and the second battery pack to form oscillating current under the condition that the heating control switch is closed, and controls energy to be circularly charged and discharged among the first battery pack, the second battery pack and the winding so as to heat the first battery pack and the second battery pack. Therefore, external heating equipment is not required to be introduced in the whole heating process, and heat energy and other equipment can be lost in pipelines, air channels and the like, so that the heating efficiency is improved.
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 circuit diagram of a battery self-heating circuit in a related art according to an embodiment of the disclosure;
fig. 2 is a circuit diagram of a battery self-heating circuit in another related art provided by an embodiment of the present disclosure;
fig. 3 is a circuit diagram of a battery self-heating circuit provided by an embodiment of the present disclosure;
FIG. 4 is a circuit diagram of another battery self-heating circuit provided by an embodiment of the present disclosure;
FIG. 5 is a circuit diagram of yet another battery self-heating circuit provided by an embodiment of the present disclosure;
FIG. 6 is a schematic current flow diagram of the self-heating circuit of the battery provided in the embodiment of FIG. 5;
FIG. 7 is another current flow schematic diagram of the battery self-heating circuit provided in the embodiment of FIG. 5;
FIG. 8 is a schematic diagram illustrating a further flow of current to the self-heating circuit of the battery provided in the embodiment of FIG. 5;
fig. 9 is a schematic diagram illustrating another current flow of the self-heating circuit of the battery provided in the embodiment of fig. 5.
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.
The terms "first," "second," and the like, as used herein, are used for distinguishing one element from another, and are not necessarily order nor importance. Furthermore, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, unless otherwise explained.
With the continuous development of vehicle technology, the battery pack is used as an energy supply element of a new energy automobile, and the development is more and more rapid. The operating characteristics of the battery pack are greatly affected by the ambient temperature, and the capacity of the battery pack is low in a low-temperature environment, and therefore, the battery pack needs to be heated at a low temperature to maintain a normal operating state.
In the related art, the heating method of the power battery of the mainstream electric automobile mainly adopts external heating, but the heating method has high cost and low heating efficiency.
Therefore, a self-heating technology for the battery pack is adopted, and the self-heating technology for the battery is realized by utilizing the cyclic charge and discharge of the battery and depending on the internal resistance of the battery.
However, the current self-heating technology still has the problems of high heating cost and low heating efficiency.
As an example, as shown in fig. 1, a self-heating system provided in the related art includes a three-phase inverter Insulated Gate Bipolar Transistor (IGBT) arm, a three-phase winding, a battery, and a capacitor, where when a temperature of the battery is lower than a set temperature threshold, the inverter IGBT arm starts to operate, and energy is controlled to be cyclically charged and discharged between the three-phase winding and the battery, so as to achieve a self-heating effect of a battery pack.
However, as shown in fig. 1, due to the limitation of topology, the current flowing through the motor windings must be input and output at the same time, for example, the current is input from the winding LU and output from the winding LV, so the heating current can only be the current limiting value of the winding of one phase, and the heating power is limited.
As another example, as shown in fig. 2, a vehicle operating mode switching control method, device and vehicle are provided in the related art, and a heating circuit of the vehicle includes a three-phase inverter IGBT leg, a three-phase winding, a battery, a capacitor and a switch between the capacitor and the winding. When the temperature of the battery is lower than the set temperature threshold, the IGBT bridge arm of the inverter starts to act, energy is controlled to be circularly charged and discharged among the motor winding, the energy storage capacitor and the battery, and the self-heating effect of the battery pack is achieved.
However, in this scheme, the currents flowing through the three-phase windings may be in the same direction, that is, the heating current may be expanded to the current limiting value of the three-phase windings, but since the impedance of the capacitor at low frequency is large, the loop impedance is increased, the current in the loop is limited, and in order to reduce the loop impedance, the capacitor needs to be further increased, which increases the cost of the entire vehicle. And under high frequency, the motor noise is great, and battery heating internal resistance is less simultaneously, and heating efficiency will reduce.
In summary, the self-heating technology of the battery in the related art has the problems of limited battery heating power, high heating cost and low heating efficiency.
To solve the above problem, the embodiment of the present disclosure provides a battery self-heating circuit and a vehicle, which can avoid the limitation of heating power, reduce the heating cost, and improve the heating efficiency.
The disclosed embodiment provides a battery self-heating circuit, as shown in fig. 1, the circuit 10 may include: power module 11, heating control switch 12, first battery pack 13, second battery pack 14, and windings 15. Wherein:
a first end of the power module 11 is connected to a positive electrode of the first battery pack 13 sequentially via the winding 15 and the heating control switch 12.
A second end of the power module 11 is connected to a positive electrode of the second battery pack 14.
The third terminal of the power module 11 is connected to the negative electrode of the first battery pack 13 and the negative electrode of the second battery pack 14, respectively.
The power module 11 is configured to generate an oscillating current among the first battery pack 13, the winding 15, and the second battery pack 14 to heat the first battery pack 13 and the second battery pack 14 when the heating control switch 12 is closed.
In practical applications, the heating control switch 12 may be closed when heating of the battery is required.
In the first heating period, after the heating control switch 12 is closed, the power module 11 may control, the first battery pack 13 may form a loop with the winding 15, and the charging current of the first battery pack 13 may flow from the positive electrode of the first battery pack 13 to the winding 15 through the closed heating control switch 12, so as to implement energy storage for the winding 15. After the winding 15 stores energy, the energy storage current of the winding 15 may flow to the power module 11, and the power module 11 may control the energy storage current to flow out from the third terminal of the power module 11, so as to return the energy storage current to the negative electrode of the first battery pack 13.
During the second period of heating, the power module 11 may control the energy storage current to flow from the second terminal of the power module 11, at which time the charging current of the first battery pack 13 and the energy storage current of the winding 15 may together charge the second battery pack 14.
During a third period of heating, first battery pack 13 may cease to supply power, and second battery pack 14 may instead be discharged. At this time, the discharging current of the second battery pack 14 flows from the positive electrode of the second battery pack 14 to the second end of the power module 11, the power module 11 controls the discharging current to flow from the first end of the power module 11, and the discharging current flows to the positive electrode of the first battery pack 13 through the winding 15 and the closed heating control switch 12, and then returns to the negative electrode of the second battery pack 14 from the negative electrode of the first battery pack 13.
During the fourth heating period, the first battery pack 13 and the second battery pack 14 stop supplying power, and in turn, the winding 15 discharges, and at this time, the energy storage current of the winding 15 flows from one end of the winding 15 to the closed heating switch, the first battery pack 13 and the third end of the power module 11 through the discharging mode, and the power module 11 can control the energy storage current to flow out from the first end of the power module 11, so that the energy storage current returns to the other end of the winding 15.
It can be seen that, through the above-mentioned heating processes in the four time periods, energy can be charged and discharged back and forth among the first battery pack 13, the winding 15 and the second battery pack 14, so that an oscillating current is formed among the first battery pack 13, the winding 15 and the second battery pack 14, wherein the oscillating current is a current whose magnitude and direction are periodically and rapidly changed, and an effect of self-heating the first battery pack 13 and the second battery pack 14 is achieved.
Alternatively, the power module 11 may finish charging the second battery pack 14 by the first battery pack 13 by alternately performing the heating process for the first period and the second period; by alternately performing the heating process for the third period and the fourth period, the charging of the first battery pack 13 by the second battery pack 14 can be completed. By alternately performing the heating processes in the first time period, the second time period, the third time period and the fourth time period, energy can be charged and discharged back and forth between the first battery pack 13 and the second battery pack 14, and thus the first battery pack 13 and the second battery pack 14 are heated.
Alternatively, the heating control switch 12 may include a temperature detection device, and the heating control switch 12 may be automatically closed when the temperature detection device detects that the current temperature is less than or equal to the temperature threshold. The heating control switch 12 may be automatically turned off when the temperature detection means detects that the current temperature is greater than the temperature threshold value.
It can be understood that, because the winding 15 includes energy storage components such as inductance, the energy storage function can be achieved.
As can be seen, the present embodiment includes, by the battery self-heating circuit 10: the power module 11, the heating control switch 12, the first battery pack 13, the second battery pack 14 and the winding 15, wherein the first end of the power module 11 is connected with the positive electrode of the first battery pack 13 sequentially through the winding 15 and the heating control switch 12; the second end of the power module 11 is connected with the positive electrode of the second battery pack 14; the third terminal of the power module 11 is connected to the negative electrode of the first battery pack 13 and the negative electrode of the second battery pack 14, respectively. When the battery needs to be heated, the power module 11 may form an oscillating current among the first battery pack 13, the winding 15, and the second battery pack 14 when the heating control switch 12 is closed, and control energy to be cyclically charged and discharged among the first battery pack 13, the second battery pack 14, and the winding 15, so as to heat the first battery pack 13 and the second battery pack 14. Therefore, external heating equipment is not required to be introduced in the whole heating process, and heat energy and other equipment can be lost in pipelines, air channels and the like, so that the heating cost is reduced, and the heating efficiency is improved. In addition, when the winding 15 is a multi-phase winding, the currents of the multi-phase winding may also be in the same direction, for example, at the same time, the direction of the current of the multi-phase winding may be from the first battery pack 13 to the power module 11, that is, the heating current is expanded to the current limiting value of the multi-phase winding, so that the problem of limited heating power is avoided. In addition, because a capacitor is not required to be arranged in the circuit, the cost is further reduced, larger motor noise is avoided, and the heating efficiency is improved.
In some embodiments, as shown in fig. 4, the power module 11 includes a bridge arm switch, which may be a single-phase bridge arm switch, and accordingly, the winding 15 may be a single-phase winding 15. A first end of the winding 15 is connected between the upper arm switching tube 111 and the lower arm switching tube 112 of the arm switch, and a second end of the winding is connected to the heating control switch. The upper arm switching tube 111 is connected to the positive electrode of the second battery pack 14. The lower arm switching tube 112 is connected to the negative electrode of the first battery stack 13 and the negative electrode of the second battery stack 14.
As an example, when the upper arm switch tube 111 (hereinafter, may be simply referred to as an upper tube) of the arm switch is turned off and the lower arm switch tube 112 (hereinafter, may be simply referred to as a lower tube) of the arm switch is turned on, the first end and the third end of the power module 11 are turned on, and at this time, the winding 15, the lower arm switch tube 112, the first battery pack 13, and the closed heating control switch 12 may form a loop. When the upper arm switch tube 111 of the arm switch is turned on and the lower arm switch tube 112 is turned off, which is equivalent to the first end and the second end of the power module 11 being turned on, at this time, the winding 15, the upper arm switch tube 111, the second battery pack 14, the first battery pack 13, and the closed heating control switch 12 may form a loop.
In some embodiments, the winding 15 is a multi-phase winding, and the arm switch is a multi-phase arm corresponding to the multi-phase winding. Alternatively, the multi-phase winding may be a three-phase winding, a six-phase winding 15, or the like, and the specific number of phases of the winding 15 is not limited herein. Accordingly, the number of phases of the bridge arm switches may correspond to the number of phases of the multi-phase winding, for example, when the multi-phase winding is a three-phase winding, the bridge arm switches are three-phase bridge arms.
As an example, as shown in fig. 5, the multiphase arm is a three-phase arm, and the multiphase winding is a three-phase winding. One leg for each phase winding 15. The first battery pack 13 is connected with a neutral point of the three-phase winding through the heating control switch 12, wherein each phase winding 15 is connected with a middle point of a corresponding bridge arm; the first bus end of the three-phase bridge arm is connected with the positive electrode of the second battery pack 14, and the second bus end of the three-phase bridge arm is connected with the negative electrode of the first battery pack 13 and the negative electrode of the second battery pack 14 respectively.
Following the above example, the battery self-heating circuit of the present embodiment may include 4 time sequences, and the operation process of each time sequence is as follows:
sequence 1: the upper tube of the three-phase bridge arm is turned off, the lower tube is turned on, and at this time, the current flow direction can be as shown in fig. 6, wherein the direction indicated by the arrow in fig. 6 is the current flow direction, the positive electrode of the first battery pack 13 provides the charging current, the charging current charges the three-phase winding through the heating control switch 12, so that the three-phase winding stores energy, and the energy storage current of the three-phase winding flows back to the negative electrode of the first battery pack 13 through the lower tube of the bridge arm.
And (2) time sequence: the upper tube of the bridge arm is turned on, the lower tube is turned off, at this time, the flow direction of the current can be as shown in fig. 7, the first battery pack 13, the heating control switch 12, the three-phase winding, the three-phase bridge arm, and the second battery pack 14 form a loop, and at this time, the first battery pack 13 and the three-phase winding jointly charge the second battery pack 14.
It is understood that the operation principle of sequence 1 and sequence 2 can refer to the operation principle of a typical boost circuit.
Sequence 3: the upper tube of the bridge arm is turned on, the lower tube is turned off, at this time, the flow direction of the current can be as shown in fig. 8, the first battery pack 13, the heating control switch 12, the three-phase winding, the three-phase bridge arm, and the second battery pack 14 form a loop, and at this time, the second battery pack 14 discharges to charge the three-phase winding and the first battery pack 13. The conversion from the time sequence 2 to the time sequence 3 can be realized by controlling the opening duration of the upper tube of the three-phase bridge arm, for example, in the time sequence 2, the opening duration of the upper tube can be controlled to be less than or equal to a first time threshold value so as to ensure that the opening duration of the upper tube is short, and optionally, the first time threshold value can be 0; and in time sequence 3, the time length of the upper tube opening can be controlled to be greater than or equal to the second time length threshold value so as to ensure that the upper tube opening time length is longer.
And 4, time sequence: the upper tube of the three-phase bridge arm is turned off, the lower tube is turned on, at this time, the flow direction of the current can be as shown in fig. 9, the first battery pack 13, the heating control switch 12, the three-phase winding, and the three-phase bridge arm can form a loop, and the three-phase winding can release the stored energy to the first battery pack 13.
In practical application, the first battery pack 13 can charge the second battery pack 14 by alternating the time sequence 1 and the time sequence 2; by alternating between the sequence 3 and the sequence 4, the charging of the first battery pack 13 by the second battery pack 14 can be completed; through the alternation of sequence 1, sequence 2, sequence 3 and sequence 4, energy can be charged and discharged back and forth between the first battery pack 13 and the second battery pack 14.
In some embodiments, the multi-phase coils of the motor are multiplexed as the multi-phase windings and the multi-phase legs of the motor controller are multiplexed as the multi-phase legs.
In some embodiments, the motor includes a driving motor or an air conditioner compressor, and the power module 11 includes a motor controller corresponding to the driving motor or a motor controller corresponding to the air conditioner compressor.
In some embodiments, referring to fig. 5 again, the battery self-heating circuit further includes a parallel switch 16, and the positive electrode of the first battery pack 13 is connected to the positive electrode of the second battery pack 14 through the parallel switch 16.
The parallel switch 16 is used to select the second battery pack 14 to supply power to the winding 15 or to select the first battery pack 13 and the second battery pack 14 to supply power to the winding 15 when the heating control switch 12 is turned off.
In some embodiments, the difference between the supply voltage of the first battery pack 13 and the supply voltage of the second battery pack 14 does not exceed a preset threshold.
In practical applications, as an embodiment, during non-self-heating, the heating control switch 12 may be turned off, and the parallel switch 16 may also be turned off, and at this time, the second battery pack 14 may supply power to the winding 15 alone.
As another embodiment, during non-self-heating, when the voltages of the first battery pack 13 and the second battery pack 14 are similar or equal, the heating control switch 12 may be opened, and the parallel switch 16 may be closed, at which time, the first battery pack 13 and the first battery pack 13 may be connected in parallel to electrically control the motor.
In some embodiments, the second battery pack 14 may include a plurality of second sub-batteries connected in parallel with each other.
Alternatively, the heating control switch 12 and the parallel switch 16 may be contact switches.
It should be noted that in some embodiments, the second battery pack 14 as the main driving power source may be a battery with excellent driving performance, such as a battery with strong instantaneous discharge capability, but a battery with large instantaneous discharge power generally has a small power density, that is, the energy stored in the battery will be less, and at this time, the first battery pack 13 may be designed as a backup battery of the second battery pack 14, which has larger energy. When the energy of the first battery pack 13 is low, for example, the charge amount is lower than the charge threshold, the motor can be controlled to charge the second battery pack 14.
Following the above example, when the first battery pack 13 charges the second battery pack 14, the parallel switch 16 is opened, and the heating control switch 12 is closed, specifically, the charging process may include the following two sequences:
sequence 5: the upper tube of the bridge arm is turned off, the lower tube is turned on, at this time, the medium current direction of the battery self-heating circuit can refer to the current direction in fig. 6, the first battery pack 13 stores energy for the winding 15, and the energy storage current of the winding 15 flows back to the battery cathode of the first battery pack 13 through the lower tube of the bridge arm.
Time sequence 6: the upper tube of the bridge arm is turned on, the lower tube is turned off, the medium current direction of the battery self-heating circuit can refer to the current direction in fig. 7, and the first battery pack 13 and the winding 15 jointly charge the second battery pack 14.
It can be seen that the battery self-heating circuit provided by the embodiment divides the battery into two parts, and the two parts are connected in parallel through the switch, and are redundant with each other. Therefore, the functional safety level of the whole vehicle is improved, and when one battery pack breaks down, the other battery pack is put into operation.
Meanwhile, under the condition that the capacity of the battery of the whole vehicle is the same, the voltage level of the whole vehicle can be reduced by connecting the batteries in parallel, the direct-connection charging cost is reduced, for example, a battery pack with an overhigh voltage level is prevented from being provided with a boosting charging device, so that the condition of a low-voltage charging pile on the market is matched.
The embodiment of the disclosure also provides a vehicle, which comprises a vehicle body and the battery self-heating circuit provided in the embodiment, wherein the self-heating circuit is arranged in the vehicle body.
The first battery pack and the second battery pack in the embodiment can adopt two batteries with different characteristics, one battery can be used as a backup battery of the other battery, so that the instant strong power output of the high-power battery can be exerted, the electric quantity of the high-power battery can be supplemented by the large-capacity backup battery, the advantages are complemented, and the performance of the whole vehicle is exerted to the maximum extent.
Claims (9)
1. A battery self-heating circuit, comprising: a power module, a heating control switch, a first battery pack, a second battery pack and a winding,
the first end of the power module is connected with the anode of the first battery pack sequentially through the winding and the heating control switch;
the second end of the power module is connected with the anode of the second battery pack;
the third end of the power module is respectively connected with the negative electrode of the first battery pack and the negative electrode of the second battery pack;
the power module is used for enabling an oscillating current to be formed among the first battery pack, the winding and the second battery pack when the heating control switch is closed so as to heat the first battery pack and the second battery pack.
2. The battery self-heating circuit of claim 1, wherein the power module comprises a bridge arm switch,
the first end of the winding is connected between an upper bridge arm switch tube and a lower bridge arm switch tube of the bridge arm switch, and the second end of the winding is connected with the heating control switch;
the upper bridge arm switching tube is connected with the anode of the second battery pack;
and the lower bridge arm switching tube is respectively connected with the negative electrode of the first battery pack and the negative electrode of the second battery pack.
3. The battery self-heating circuit of claim 2, wherein the winding is a multi-phase winding and the bridge arm switches are multi-phase bridge arms corresponding to the multi-phase winding.
4. The battery self-heating circuit of claim 3, wherein a multi-phase coil of a motor is multiplexed as the multi-phase winding, and a multi-phase leg of a motor controller is multiplexed as the multi-phase leg.
5. The battery self-heating circuit of claim 4, wherein the motor comprises a drive motor or an air conditioner compressor, and the power module comprises a motor controller corresponding to the drive motor or a motor controller corresponding to the air conditioner compressor.
6. The battery self-heating circuit according to claim 1, further comprising a parallel switch through which the positive electrode of the first battery pack is connected with the positive electrode of the second battery pack,
the parallel switch is used for selectively using the second battery pack to supply power to the winding when the heating control switch is switched off, or selectively using the first battery pack and the second battery pack to supply power to the winding.
7. The battery self-heating circuit of claim 6, wherein a difference between a supply voltage of the first battery pack and a supply voltage of the second battery pack does not exceed a preset threshold.
8. The battery self-heating circuit according to any one of claims 1-7, wherein the second battery pack comprises a plurality of second sub-batteries connected in parallel with each other.
9. A vehicle characterized by comprising a vehicle body and the battery self-heating circuit of any one of claims 1 to 8, which is provided in the vehicle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222906259.5U CN218731293U (en) | 2022-10-31 | 2022-10-31 | Battery self-heating circuit and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222906259.5U CN218731293U (en) | 2022-10-31 | 2022-10-31 | Battery self-heating circuit and vehicle |
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| CN218731293U true CN218731293U (en) | 2023-03-24 |
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| CN202222906259.5U Active CN218731293U (en) | 2022-10-31 | 2022-10-31 | Battery self-heating circuit and vehicle |
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- 2022-10-31 CN CN202222906259.5U patent/CN218731293U/en active Active
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