A PHEV battery heating control method, system, and vehicle

Abstract

This disclosure discloses a PHEV battery heating control method, system, and vehicle. The method includes setting up an engine circuit, a heat source circuit, and a battery circuit; utilizing the engine circuit to obtain waste heat from the engine coolant, transferring the heat from the waste heat through the antifreeze coolant in the heat source circuit, and then transferring the heat to the battery circuit via a water plate heat exchanger to heat the battery; and / or, using an HVH heater to heat the antifreeze coolant in the heat source circuit, and then transferring the heat from the antifreeze coolant to the battery circuit via a water plate heat exchanger to heat the battery; during the battery heating process, adjusting the heating status of the heat source circuit according to the overall vehicle conditions to respond to the battery heating request. This disclosure can achieve heating through waste heat from the engine coolant, heating of the coolant through HVH, or simultaneous heating of both heat sources to meet the battery heating request and satisfy the battery temperature uniformity requirement.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of automotive technology, in particular to a PHEV battery heating control method and system and a vehicle. BACKGROUND

[0002] Plug-in hybrid electric vehicle is a new energy vehicle between pure electric vehicle and fuel vehicle, which has engine, gearbox, fuel tank and other traditional vehicle components, and also has battery, electric motor, control circuit and other pure electric vehicle components. The hybrid vehicle has a large battery capacity and an external charging interface, which combines the advantages of pure electric vehicles and fuel vehicles, and can realize pure electric and zero emission driving, and also increase the vehicle's range through hybrid mode.

[0003] The main problem of current hybrid vehicles is that the battery's temperature uniformity is poor at low temperatures, which reduces the battery's discharge capacity and affects the vehicle's range and power economy. Therefore, how to improve the battery's temperature uniformity at low temperatures and further improve its discharge capacity and range is a major research topic in the new energy vehicle industry. SUMMARY

[0004] The present disclosure aims to provide a PHEV battery heating control method and system and a vehicle to realize the heating and temperature uniformity of the battery under different working conditions and environmental conditions, and further improve the battery's discharge capacity.

[0005] To achieve the above purpose, the present disclosure provides a PHEV battery heating control method, which comprises:

[0006] An engine circuit, a heat source circuit and a battery circuit are provided, wherein the engine circuit comprises an engine, the heat source circuit comprises an HVH heater, and the battery circuit comprises a water-water plate heat exchanger. The engine circuit is connected in parallel with the heat source circuit through the engine, and the heat source circuit is connected in parallel with the battery circuit through the water-water plate heat exchanger.

[0007] The engine circuit is used to obtain engine water temperature waste heat, the heat source circuit is used to transmit the heat of the engine water temperature waste heat through the anti-freezing coolant, and the water-water plate heat exchanger is used to exchange heat to the battery circuit to heat the battery; and / or the HVH heater is used to heat the anti-freezing coolant in the heat source circuit, and the water-water plate heat exchanger is used to exchange heat of the anti-freezing coolant to the battery circuit to heat the battery.

[0008] During the heating process of the battery, the heating condition of the heat source circuit is adjusted according to the overall situation of the vehicle to respond to the heating request of the battery.

[0009] Further, the engine circuit, the heat source circuit and the battery circuit are provided, which comprises:

[0010] The outlet of the first water bottle is connected with one end of the engine through an engine water pump, and the other end of the engine is connected with the inlet of the first water bottle; wherein the engine circuit further comprises the first water bottle and the engine water pump, and the first water bottle is filled with anti-freezing coolant;

[0011] The other end of the engine is connected with the interface one of the second three-way electromagnetic valve, the one end of the engine is connected with the interface three of the second three-way electromagnetic valve through the engine water pump and the HVH water pump in sequence, the interface two of the second three-way electromagnetic valve is connected with the interface one of the first three-way electromagnetic valve through the HVH heater, the interface two of the first three-way electromagnetic valve is connected with the one end of the engine through the heater core, and the interface three of the first three-way electromagnetic valve is connected with the one end of the engine through the water-water plate heat exchanger; wherein the heat source circuit comprises the water pump, the first three-way electromagnetic valve, the second three-way electromagnetic valve and the heater core;

[0012] The one end of the battery is connected with the inlet of the second water bottle, and the outlet of the second water bottle is connected with the inlet of the water-water plate heat exchanger through a battery water pump, and the outlet of the water-water plate heat exchanger is connected with the other end of the battery; wherein the battery circuit comprises the second water bottle, the battery water pump and the battery, and the second water bottle is filled with anti-freezing coolant.

[0013] Further, in the process of heating the battery, the heating condition of the heat source circuit is adjusted according to the overall condition of the vehicle to respond to the heating request of the battery, comprising:

[0014] When the battery and the passenger cabin have heating requests at the same time, the overall condition of the vehicle is judged:

[0015] If the overall condition of the vehicle is not established, the engine water temperature is continued to be judged, the heating condition of the heat source circuit is adjusted to respond to the heating request of the battery, and the engine start request is not sent;

[0016] If the overall condition of the vehicle is established, the engine water temperature is continued to be judged, the heating condition of the heat source circuit is adjusted to respond to the heating request of the battery, and whether to send the engine start request is selected according to the engine water temperature;

[0017] When the battery has a heating request and the passenger cabin does not need heating, the engine water temperature is judged:

[0018] If the engine water temperature is greater than or equal to the first predetermined temperature, the HVH water pump is turned off, the duty cycle of the engine water pump is set to the first predetermined value, and the duty cycle of the second three-way electromagnetic valve is set to the second predetermined value, that is, the engine water temperature waste heat heating is used to respond to the battery heating request under this condition, and the engine start request is not sent at this time;

[0019] If the engine water temperature < the first predetermined temperature, the duty ratio of the HVH water pump is set to a third predetermined value, the duty ratio of the engine water pump and the duty ratio of the second three-way electromagnetic valve are both set to 0, i.e. under this condition, the HVH heater is used to heat the heating system to respond to the battery heating request.

[0020] Further, if the vehicle comprehensive condition is not established, the engine water temperature is continuously judged, the heating condition of the heat source circuit is adjusted to respond to the battery heating request, and the engine start request is not sent, including:

[0021] When the engine water temperature < the second predetermined temperature, the duty ratio of the HVH water pump is set to a fourth predetermined value, the duty ratio of the engine water pump and the duty ratio of the second three-way electromagnetic valve are both set to 0, i.e. under this condition, the HVH heater is used to heat the heating system to respond to the battery heating request, and the engine start request is not sent at this time;

[0022] When the engine water temperature ≥ the second predetermined temperature, the HVH water pump is closed, the duty ratio of the engine water pump is set to a fifth predetermined value, and the duty ratio of the second three-way electromagnetic valve is set to a second predetermined value, i.e. under this condition, the engine water temperature waste heat is used to heat the heating system to respond to the battery heating request, and the engine start request is not sent at this time.

[0023] Further, if the vehicle comprehensive condition is established, the engine water temperature is continuously judged, the heating condition of the heat source circuit is adjusted to respond to the battery heating request, and whether to send the engine start request is selected according to the engine water temperature, including:

[0024] When the engine water temperature < the second predetermined temperature, the engine start request is sent or the HVH heater is started to respond to the battery heating request;

[0025] When the engine water temperature ≥ the second predetermined temperature, the duty ratio of the engine water pump is set to a fifth predetermined value, the duty ratio of the second three-way electromagnetic valve is set to a second predetermined value, the engine start request is not sent, and the HVH water pump is closed, i.e. under this condition, the engine water temperature waste heat is used to heat the heating system to respond to the battery heating request.

[0026] Further, the sending of the engine start request or the starting of the HVH heater when the engine water temperature < the second predetermined temperature to respond to the battery heating request includes:

[0027] If the engine water temperature > the HVH heater outlet temperature or the engine water temperature ≥ the HVH heater outlet temperature + a third predetermined temperature, the duty ratio of the second three-way electromagnetic valve is set to a second predetermined value, the HVH water pump is closed, the duty ratio of the engine water pump is set to a fifth predetermined value, and the engine start request is sent, i.e. under this condition, the engine water temperature waste heat and the HVH heater heat different proportions of the heating system to respond to the battery heating request;

[0028] If the engine water temperature < HVH heater outlet temperature, the duty cycles of the engine water pump and the second three-way electromagnetic valve are both set to 0, the duty cycle of the HVH water pump is set to a fourth predetermined value, the engine start request is sent, and the HVH heater works, that is, the HVH heater is used to heat the heating in this condition to respond to the battery heating request, at this time, the engine start water circulation does not pass through the battery, and the water temperature is quickly raised through the engine internal circulation.

[0029] Based on the unified invention concept, the embodiment of the present disclosure further provides a PHEV battery heating control system, which comprises an engine circuit, a heat source circuit and a battery circuit, the engine circuit comprises an engine, the heat source circuit comprises an HVH heater, and the battery circuit comprises a water-water plate heat exchanger;

[0030] The engine circuit is connected in parallel with the heat source circuit through the engine, and the heat source circuit is connected in parallel with the battery circuit through the water-water plate heat exchanger;

[0031] The engine circuit is used to obtain engine water temperature waste heat and transmit it to the heat source circuit;

[0032] The heat source circuit is used to transmit the engine water temperature waste heat through the antifreeze coolant in the circuit, and heat the battery by exchanging heat of the engine water temperature waste heat to the battery circuit through the water-water plate heat exchanger;

[0033] The heat source circuit is also used to heat the antifreeze coolant in the circuit through the HVH heater, and heat the battery by exchanging heat of the antifreeze coolant to the battery circuit through the water-water plate heat exchanger.

[0034] Further, the engine circuit further comprises a first water kettle and an engine water pump, the first water kettle is filled with antifreeze coolant; the outlet of the first water kettle is connected with one end of the engine through the engine water pump, and the other end of the engine is connected with the inlet of the first water kettle;

[0035] The heat source circuit comprises a water pump, a first three-way electromagnetic valve, a second three-way electromagnetic valve and a heater core, the other end of the engine is connected with interface one of the second three-way electromagnetic valve, the one end of the engine is connected with interface three of the second three-way electromagnetic valve through the engine water pump and the HVH water pump in sequence, interface two of the second three-way electromagnetic valve is connected with interface one of the first three-way electromagnetic valve, interface two of the first three-way electromagnetic valve is connected with the one end of the engine through the heater core, and interface three of the first three-way electromagnetic valve is connected with the one end of the engine through the water-water plate heat exchanger; wherein, the heater core is used to heat the passenger compartment by using the heat of the antifreeze coolant in the heat source circuit;

[0036] The battery circuit further comprises a second water kettle, a battery water pump and a battery, the second water kettle is filled with anti-freezing coolant; one end of the battery is connected with an inlet of the second water kettle, an outlet of the second water kettle is connected with an inlet of the water-water plate heat exchanger through the battery water pump, and the other end of the battery is connected with an outlet of the water-water plate heat exchanger.

[0037] Further, the engine circuit further comprises a high-temperature radiator, one end of the high-temperature radiator is connected with the other end of the engine, and the other end of the high-temperature radiator is connected with the inlet of the first water kettle, and the high-temperature radiator is used for heat dissipation of the engine circuit.

[0038] The battery circuit further comprises a battery cooler, the battery cooler is connected in series between the battery water pump and the water-water plate heat exchanger, and the battery cooler is used for heat dissipation of the battery circuit.

[0039] Based on the same inventive concept, the disclosure also provides a vehicle comprising the PHEV battery heating control system as described above.

[0040] Technical effects and advantages of the disclosure: the disclosure can be realized by engine water temperature waste heat, can also be realized by HVH heating coolant, and can also be realized by using both heat sources to heat at the same time, realizes battery heating request, and meets the battery temperature equalization demand; through the precise control strategy, the battery heating temperature equalization request under different working conditions and environmental conditions can be realized by adjusting the electromagnetic valve and the water pump duty cycle, so that the discharge capacity of the battery is improved, and the long endurance ability of the new energy vehicle is realized, and the real energy saving and environmental protection are realized.

[0041] Other features and advantages of the disclosure will be described in the following description, and some will become apparent from the description, or will be understood by those skilled in the art. The purpose and other advantages of the disclosure can be achieved and obtained by the structure indicated in the specification, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the disclosure, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0043] Figure 1 The structure schematic diagram of the PHEV battery heating control system according to an embodiment of the disclosure is shown in the figure.

[0044] Figure 2 The heating process of the PHEV battery heating control method according to an embodiment of the disclosure is shown in the figure. Figure 1 ;

[0045] Figure 3 A heating process of a PHEV battery heating control method Figure 2 . DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative labor are within the scope of protection of the present disclosure.

[0047] To solve the problems in the prior art, the present disclosure discloses a PHEV battery heating control method, comprising:

[0048] An engine circuit, a heat source circuit and a battery circuit are provided, wherein the engine circuit comprises an engine, the heat source circuit comprises an HVH heater, and the battery circuit comprises a water-water plate heat exchanger; the engine circuit is connected in parallel with the heat source circuit through the engine, and the heat source circuit is connected in parallel with the battery circuit through the water-water plate heat exchanger;

[0049] Engine water temperature waste heat is obtained by using the engine circuit, and the heat of the engine water temperature waste heat is transmitted through the antifreeze coolant in the heat source circuit and is exchanged to the battery circuit through the water-water plate heat exchanger to heat the battery; and / or the antifreeze coolant in the heat source circuit is heated by using the HVH heater, and the heat of the antifreeze coolant is exchanged to the battery circuit through the water-water plate heat exchanger to heat the battery;

[0050] During the process of heating the battery, the heating condition of the heat source circuit is adjusted according to the overall situation of the vehicle to respond to the heating request of the battery.

[0051] In some specific embodiments, as shown in Figure 1 The engine circuit, the heat source circuit and the battery circuit are provided, comprising:

[0052] The outlet of the first water kettle is connected to one end of the engine through an engine water pump, and the other end of the engine is connected to the inlet of the first water kettle; wherein the engine circuit further comprises a first water kettle and an engine water pump, and the first water kettle is filled with antifreeze coolant;

[0053] connect the other end of the engine with the interface two of the second three-way electromagnetic valve, connect the engine end with the interface three of the second three-way electromagnetic valve in turn through the engine water pump and the HVH water pump, connect the interface two of the second three-way electromagnetic valve with the interface one of the first three-way electromagnetic valve through the HVH heater, and connect the interface two of the first three-way electromagnetic valve with the engine end through the heater core, and connect the interface three of the first three-way electromagnetic valve with the engine end through the water-water plate heat exchanger; wherein the heat source circuit comprises the water pump, the first three-way electromagnetic valve, the second three-way electromagnetic valve and the heater core.

[0054] connect the one end of the battery with the inlet of the second water kettle, connect the outlet of the second water kettle with the inlet of the water-water plate heat exchanger through the battery water pump, and connect the outlet of the water-water plate heat exchanger with the other end of the battery; wherein the battery circuit comprises the second water kettle, the battery water pump and the battery, and the second water kettle is filled with anti-freezing coolant.

[0055] In some specific embodiments, a high-temperature radiator is further arranged in the engine circuit, one end of the high-temperature radiator is connected with the other end of the engine, and the other end of the high-temperature radiator is connected with the inlet of the first water kettle, so as to dissipate heat of the engine circuit by the high-temperature radiator.

[0056] A battery cooler is further arranged in the battery circuit, and the battery cooler is connected in series between the battery water pump and the water-water plate heat exchanger, so as to dissipate heat of the battery circuit by the battery cooler.

[0057] In the engine circuit, the heat source circuit and the battery circuit, each component is connected by a water pipe.

[0058] In some specific embodiments, as shown in Figure 2 and Figure 3 In the process of heating the battery, the heating condition of the heat source circuit is adjusted according to the overall condition of the vehicle to respond to the heating request of the battery, including:

[0059] When the battery and the passenger compartment have heating requests at the same time in a low-temperature environment, the overall condition of the vehicle is judged:

[0060] If the overall condition of the vehicle is not established, the engine water temperature is continued to be judged, the heating condition of the heat source circuit is adjusted to respond to the heating request of the battery, and the engine start request is not sent;

[0061] If the overall condition of the vehicle is established, the engine water temperature is continued to be judged, the heating condition of the heat source circuit is adjusted to respond to the heating request of the battery, and whether to send the engine start request is selected according to the engine water temperature;

[0062] When the battery has a heating request in a low-temperature environment and the passenger compartment does not need to be heated, the engine water temperature is judged:

[0063] If the engine water temperature ≥ the first predetermined temperature (i.e. 20℃), the HVH water pump is turned off, the duty ratio of the engine water pump is set to the first predetermined value (i.e. 27.9%), and the duty ratio of the second three-way electromagnetic valve is set to the second predetermined value (i.e. 33.3%), i.e. engine water temperature waste heat heating is adopted under this condition to respond to the battery heating request, and at this time no engine start request is sent;

[0064] If the engine water temperature < the first predetermined temperature, the duty ratio of the HVH water pump is set to the third predetermined value (i.e. 50%), and the duty ratios of the engine water pump and the second three-way electromagnetic valve (i.e. the duty ratio of 3WV#2 in the above table) are both set to 0, i.e. the HVH heater is used for heating under this condition to respond to the battery heating request. Figure 2 、 Figure 3

[0065] The vehicle comprehensive conditions include: the temperature in the vehicle, the ignition switch, the ambient temperature, the battery management system heating signal, etc.; whether the vehicle comprehensive conditions are established is determined, i.e. whether all the conditions are established at the same time.

[0066] In some specific embodiments, if the vehicle comprehensive conditions are not established, the engine water temperature is continuously determined, the heating of the heat source circuit is adjusted to respond to the battery heating request, and no engine start request is sent, including:

[0067] When the engine water temperature < the second predetermined temperature (i.e. 65℃), the duty ratio of the HVH water pump is set to the fourth predetermined value (i.e. 60%), and the duty ratios of the engine water pump and the second three-way electromagnetic valve are both set to 0, i.e. the HVH heater is used for heating under this condition to respond to the battery heating request, and at this time no engine start request is sent;

[0068] When the engine water temperature ≥ the second predetermined temperature (i.e. 65℃), the HVH water pump is turned off, the duty ratio of the engine water pump is set to the fifth predetermined value (i.e. 46.9%), and the duty ratio of the second three-way electromagnetic valve is set to the second predetermined value (i.e. 33.3%), i.e. engine water temperature waste heat heating is adopted under this condition to respond to the battery heating request, and at this time no engine start request is sent.

[0069] In some specific embodiments, if the vehicle comprehensive conditions are established, the engine water temperature is continuously determined, the heating of the heat source circuit is adjusted to respond to the battery heating request, and whether the engine start request is sent is selected according to the engine water temperature, including:

[0070] (1) When the engine water temperature < the second predetermined temperature (i.e. 65℃), the engine start request is sent or the HVH heater is started to respond to the battery heating request; specifically as follows:

[0071] ​If the engine water temperature > the HVH heater outlet temperature, the duty ratio of the second three-way electromagnetic valve is set to a second predetermined value (i.e. 33.3%), the HVH water pump is closed, and the duty ratio of the engine water pump is set to a fifth predetermined value (i.e. 46.9%), and an engine start request is sent, that is, under this condition, the engine water temperature waste heat and the HVH heater heating are mixed in different proportions to respond to the battery heating request;

[0072] If the engine water temperature < the HVH heater outlet temperature, the duty ratios of the engine water pump and the second three-way electromagnetic valve are both set to 0, and the duty ratio of the HVH water pump is set to a fourth predetermined value (i.e. 60%), and an engine start request is sent, and the HVH heater works, that is, under this condition, the HVH heater heating is used to respond to the battery heating request, and at this time, the engine start water circulation does not pass through the battery, and the water temperature is quickly raised through the engine internal circulation.

[0073] If the engine water temperature ≥ the HVH heater outlet temperature + a third predetermined temperature (i.e. 2℃), the last strategy (i.e. the engine water temperature > the HVH heater outlet temperature) is used again, that is, the engine water temperature waste heat and the HVH heater heating are mixed in different proportions to respond to the battery heating request.

[0074] (2) When the engine water temperature ≥ a second predetermined temperature (i.e. 65℃), the duty ratio of the engine water pump is set to a fifth predetermined value (i.e. 46.9%), the duty ratio of the second three-way electromagnetic valve is set to a second predetermined value (i.e. 33.3%), no engine start request is sent, and the HVH water pump is closed, that is, under this condition, the engine water temperature waste heat is used to respond to the battery heating request.

[0075] Based on the same inventive concept, the disclosure also provides a PHEV battery heating control system, as shown in Figure 1 The system comprises an engine circuit, a heat source circuit and a battery circuit, the engine circuit comprises an engine, the heat source circuit comprises an HVH heater, and the battery circuit comprises a water-water plate heat exchanger;

[0076] The engine circuit is connected in parallel with the heat source circuit through the engine, and the heat source circuit is connected in parallel with the battery circuit through the water-water plate heat exchanger;

[0077] The engine circuit is used to obtain engine water temperature waste heat and transmit it to the heat source circuit;

[0078] The heat source circuit is used to transmit the engine water temperature waste heat through the antifreeze coolant in the circuit, and heat exchange the heat in the engine water temperature waste heat to the battery circuit through the water-water plate heat exchanger to heat the battery;

[0079] The heat source circuit is also used for heating the anti-freezing coolant in the circuit by the HVH heater, and exchanging heat in the anti-freezing coolant to the battery circuit by the water-water plate heat exchanger to heat the battery.

[0080] In some specific embodiments, the engine circuit further comprises a first water kettle and an engine water pump, the first water kettle is filled with anti-freezing coolant; the outlet of the first water kettle is connected with one end of the engine through the engine water pump, and the other end of the engine is connected with the inlet of the first water kettle;

[0081] The heat source circuit comprises a water pump, a first three-way electromagnetic valve, a second three-way electromagnetic valve and a heater core, the other end of the engine is connected with interface one of the second three-way electromagnetic valve, the one end of the engine is connected with interface three of the second three-way electromagnetic valve through the engine water pump and the HVH water pump in sequence, interface two of the second three-way electromagnetic valve is connected with interface one of the first three-way electromagnetic valve, interface two of the first three-way electromagnetic valve is connected with the one end of the engine through the heater core, and interface three of the first three-way electromagnetic valve is connected with the one end of the engine through the water-water plate heat exchanger; wherein the heater core is used for heating the passenger compartment by using the heat of the anti-freezing coolant in the heat source circuit;

[0082] The battery circuit further comprises a second water kettle, a battery water pump and a battery, the second water kettle is filled with anti-freezing coolant; one end of the battery is connected with the inlet of the second water kettle, the outlet of the second water kettle is connected with the inlet of the water-water plate heat exchanger through the battery water pump, and the outlet of the water-water heat exchanger is connected with the other end of the battery.

[0083] In some specific embodiments, the engine circuit further comprises a high-temperature radiator and an engine internal component TC, one end of the high-temperature radiator is connected with the other end of the engine, the other end of the high-temperature radiator is connected with the inlet of the first water kettle, and the two ends of the engine internal component TC are connected with the two ends of the engine in series. The high-temperature radiator is an external heat dissipation component of the engine circuit, and the high-temperature radiator is used for dissipating heat of the engine circuit.

[0084] The battery circuit further comprises a battery cooler, which is connected in series between the battery water pump and the water-water plate heat exchanger; the battery cooler is a high-temperature weather battery cooling component, and the battery cooler is used for dissipating heat of the battery circuit.

[0085] As to the system in the above embodiments, the specific manner in which each unit module performs the operation has been described in detail in the embodiments related to the method, and will not be described in detail here.

[0086] Based on the same inventive concept, the disclosure also provides a vehicle comprising a PHEV battery heating control system as described above.

[0087] The control system of the embodiment of the present disclosure controls the heating principle: the engine water temperature waste heat is obtained through the engine circuit, and is transmitted to the heat source circuit through the antifreeze coolant in the engine circuit, and then passes through the second three-way electromagnetic valve and the first three-way electromagnetic valve in the heat source circuit, and then the heat in the antifreeze coolant is exchanged to the battery circuit through the water-water plate heat exchanger to heat the battery; the antifreeze coolant in the circuit can also be heated by the HVH heater in the heat source circuit, and then the heat of the antifreeze coolant in the heat source circuit is exchanged to the battery circuit through the water-water plate heat exchanger to heat the battery; the duty cycle of the three-way electromagnetic valve and the water pump in the entire circuit and the power of the HVH can also be adjusted according to the overall situation of the vehicle, and the engine water temperature waste heat and the HVH heating mixed heating mode are used to heat the battery.

[0088] That is, the present disclosure can be realized by engine water temperature waste heat, or by HVH heating coolant, or by both heat sources simultaneously heating, to realize battery heating request to meet the battery temperature equalization demand.

[0089] Finally, it should be noted that: the above only describes the preferred embodiments of the present disclosure, and is not used to limit the present disclosure, although the foregoing embodiments of the present disclosure are described in detail, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present disclosure, should be included in the protection scope of the present disclosure.

Claims

1. A PHEV battery heating control method, characterized by, The method comprises the following steps: setting an engine circuit, a heat source circuit and a battery circuit; wherein the engine circuit comprises an engine, the heat source circuit comprises an HVH heater, and the battery circuit comprises a water-water plate heat exchanger; the engine circuit is connected in parallel with the heat source circuit through the engine, and the heat source circuit is connected in parallel with the battery circuit through the water-water plate heat exchanger; utilizing the engine circuit to obtain engine water temperature waste heat, transmitting the heat of the engine water temperature waste heat through the anti-freezing coolant in the heat source circuit, and exchanging heat through the water-water plate heat exchanger to heat the battery in the battery circuit; and / or utilizing the HVH heater to heat the anti-freezing coolant in the heat source circuit, and exchanging heat of the anti-freezing coolant through the water-water plate heat exchanger to heat the battery in the battery circuit; in the process of heating the battery, adjusting the heating condition of the heat source circuit according to the overall condition of the vehicle to respond to the heating request of the battery; wherein the engine circuit, the heat source circuit and the battery circuit are set, comprising: connecting the outlet of the first kettle to one end of the engine through an engine water pump, and connecting the other end of the engine to the inlet of the first kettle; wherein the engine circuit further comprises the first kettle and the engine water pump, and the first kettle is filled with anti-freezing coolant; connecting the other end of the engine to interface one of the second three-way electromagnetic valve, connecting the one end of the engine to interface three of the second three-way electromagnetic valve through the engine water pump and the HVH water pump in sequence, connecting interface two of the second three-way electromagnetic valve to interface one of the first three-way electromagnetic valve through the HVH heater, connecting interface two of the first three-way electromagnetic valve to the one end of the engine through the heater core, and connecting interface three of the first three-way electromagnetic valve to the one end of the engine through the water-water plate heat exchanger; wherein the heat source circuit comprises the water pump, the first three-way electromagnetic valve, the second three-way electromagnetic valve and the heater core; connecting one end of the battery to the inlet of the second kettle, connecting the outlet of the second kettle to the inlet of the water-water plate heat exchanger through a battery water pump, and connecting the outlet of the water-water plate heat exchanger to the other end of the battery; wherein the battery circuit comprises the second kettle, the battery water pump and the battery, and the second kettle is filled with anti-freezing coolant.

2. The PHEV battery heating control method of claim 1, wherein, in the process of heating the battery, adjusting the heating condition of the heat source circuit according to the overall condition of the vehicle to respond to the heating request of the battery, comprising: when the battery and the passenger compartment have a heating request at the same time, judging the overall condition of the vehicle: if the overall condition of the vehicle is not established, continue to judge the engine water temperature, adjust the heating condition of the heat source circuit to respond to the heating request of the battery, and do not send the engine start request; if the overall condition of the vehicle is established, continue to judge the engine water temperature, adjust the heating condition of the heat source circuit to respond to the heating request of the battery, and select whether to send the engine start request according to the engine water temperature; when the battery has a heating request and the passenger compartment does not need to be heated, judge the engine water temperature: if the engine water temperature is greater than or equal to the first predetermined temperature, turn off the HVH water pump, set the duty cycle of the engine water pump to the first predetermined value, and set the duty cycle of the second three-way electromagnetic valve to the second predetermined value, that is, under this condition, the engine water temperature waste heat heating is adopted to respond to the battery heating request, and at this time, the engine start request is not sent; If the engine water temperature is less than a first predetermined temperature, a duty ratio of the HVH water pump is set to a third predetermined value, and a duty ratio of the engine water pump and a duty ratio of the second three-way electromagnetic valve are both set to 0, i.e., under this condition, the HVH heater is used to heat the heating system to respond to the battery heating request.

3. The PHEV battery heating control method of claim 2, wherein, If the vehicle comprehensive condition is not established, the engine water temperature is continuously judged, the heating condition of the heat source circuit is adjusted to respond to the battery heating request, and the engine start request is not sent, including: When the engine water temperature is less than a second predetermined temperature, the duty ratio of the HVH water pump is set to a fourth predetermined value, and the duty ratio of the engine water pump and the duty ratio of the second three-way electromagnetic valve are both set to 0, i.e., under this condition, the HVH heater is used to heat the heating system to respond to the battery heating request, and the engine start request is not sent at this time; When the engine water temperature is greater than or equal to the second predetermined temperature, the HVH water pump is turned off, the duty ratio of the engine water pump is set to a fifth predetermined value, and the duty ratio of the second three-way electromagnetic valve is set to a second predetermined value, i.e., under this condition, the engine water temperature waste heat is used to heat the heating system to respond to the battery heating request, and the engine start request is not sent at this time.

4. The PHEV battery heating control method of claim 2, wherein, If the vehicle comprehensive condition is established, the engine water temperature is continuously judged, the heating condition of the heat source circuit is adjusted to respond to the battery heating request, and whether to send the engine start request is selected according to the engine water temperature, including: When the engine water temperature is less than the second predetermined temperature, the engine start request or the HVH heater is started to respond to the battery heating request; When the engine water temperature is greater than or equal to the second predetermined temperature, the duty ratio of the engine water pump is set to the fifth predetermined value, the duty ratio of the second three-way electromagnetic valve is set to the second predetermined value, the engine start request is not sent, and the HVH water pump is turned off, i.e., under this condition, the engine water temperature waste heat is used to heat the heating system to respond to the battery heating request.

5. The PHEV battery heating control method of claim 4, wherein, The engine start request or the HVH heater is started to respond to the battery heating request when the engine water temperature is less than the second predetermined temperature, including: If the engine water temperature is greater than or equal to the HVH heater outlet temperature or the engine water temperature is greater than or equal to the HVH heater outlet temperature + a third predetermined temperature, the duty ratio of the second three-way electromagnetic valve is set to the second predetermined value, the HVH water pump is turned off, the duty ratio of the engine water pump is set to the fifth predetermined value, and the engine start request is sent, i.e., under this condition, the engine water temperature waste heat and the HVH heater heat different proportions of the heating system to respond to the battery heating request; If the engine water temperature is less than the HVH heater outlet temperature, the duty ratios of the engine water pump and the second three-way electromagnetic valve are both set to 0, and the duty ratio of the HVH water pump is set to the fourth predetermined value, and the engine start request is sent, and the HVH heater works, i.e., under this condition, the HVH heater is used to heat the heating system to respond to the battery heating request, and at this time, the engine start water circulation does not pass through the battery, but through the engine internal circulation to quickly raise the water temperature.

6. A PHEV battery heating control system, characterized by, The system includes an engine circuit, a heat source circuit, and a battery circuit, the engine circuit includes an engine, the heat source circuit includes an HVH heater, and the battery circuit includes a water-water plate heat exchanger; The engine circuit is connected in parallel with the heat source circuit through the engine, and the heat source circuit is connected in parallel with the battery circuit through a water-water plate heat exchanger; The engine circuit is used to obtain engine water temperature waste heat and transmit it to the heat source circuit; The heat source circuit is used to transmit engine water temperature waste heat through the anti-freezing coolant in the circuit, and heat exchange the heat in the engine water temperature waste heat to the battery circuit through the water-water plate heat exchanger to heat the battery; The heat source circuit is also used to heat the anti-freezing coolant in the circuit through the HVH heater, and heat exchange the heat in the anti-freezing coolant to the battery circuit through the water-water plate heat exchanger to heat the battery; The engine circuit further comprises a first water kettle and an engine water pump, the first water kettle is filled with anti-freezing coolant; the outlet of the first water kettle is connected with one end of the engine through the engine water pump, and the other end of the engine is connected with the inlet of the first water kettle; The heat source circuit comprises a water pump, a first three-way electromagnetic valve, a second three-way electromagnetic valve and a heater core, the other end of the engine is connected with interface one of the second three-way electromagnetic valve, the one end of the engine is connected with interface three of the second three-way electromagnetic valve through the engine water pump and the HVH water pump in sequence, interface two of the second three-way electromagnetic valve is connected with interface one of the first three-way electromagnetic valve, interface two of the first three-way electromagnetic valve is connected with the one end of the engine through the heater core, and interface three of the first three-way electromagnetic valve is connected with the one end of the engine through the water-water plate heat exchanger; the heater core is used to heat the passenger compartment by using the heat of the anti-freezing coolant in the heat source circuit; The battery circuit further comprises a second water kettle, a battery water pump and a battery, the second water kettle is filled with anti-freezing coolant; one end of the battery is connected with the inlet of the second water kettle, the outlet of the second water kettle is connected with the inlet of the water-water plate heat exchanger through the battery water pump, and the outlet of the water-water plate heat exchanger is connected with the other end of the battery.

7. The PHEV battery heating control system according to claim 6, wherein The engine circuit further comprises a high-temperature radiator, one end of the high-temperature radiator is connected with the other end of the engine, and the other end of the high-temperature radiator is connected with the inlet of the first water kettle, and the high-temperature radiator is used to dissipate heat of the engine circuit; The battery circuit further comprises a battery cooler, the battery cooler is connected in series between the battery water pump and the water-water plate heat exchanger, and the battery cooler is used to dissipate heat of the battery circuit.

8. A vehicle characterized by comprising: The PHEV battery heating control system comprises any one of the systems according to claims 6-7.

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