Temperature regulation system, method and vehicle for an energy storage module

Abstract

The application discloses a temperature adjusting system and method of an energy storage module and a vehicle, and is arranged on the vehicle. The temperature adjusting system of the energy storage module comprises an oil tank, a battery pack assembly, an oil circuit pipeline, a heater and a controller. The battery pack assembly comprises a heat exchange pipe, a battery module and a first temperature sensor. The battery module is in contact with the heat exchange pipe. When the vehicle is not in a fuel driving state, the oil tank, the heat exchange pipe and the oil circuit pipeline are in conduction to form a first circulation loop. The controller is electrically connected with the first temperature sensor and the heater. The first temperature sensor is used for collecting the temperature of the battery module. In the technical scheme, the fuel in the oil tank is used as a cooling liquid to regulate and control the temperature of the battery pack. The fuel is circulated in the oil circulation loop by the oil pump of the oil tank, so that the weight of the vehicle is simplified, and a more efficient temperature control strategy is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, and in particular to a temperature regulation system and method for an energy storage module and a vehicle. BACKGROUND

[0002] The energy storage module can include an oil-electric energy storage module, which is an energy storage mode in which an oil tank and a battery pack coexist to provide power for vehicle driving.

[0003] There are four common hybrid technologies on the current market: MHEV (Mild Hybrid Electric Vehicle), HEV (Hybrid Electric Vehicle), PHEV (Plug-in Hybird Electric Vehicle), and REEV (Range Extender Electric Vehicle). Regardless of the type of hybrid technology, a heating mechanism is needed to prevent the oil tank and battery pack from being too cold to provide energy for the power system, and a cooling mechanism is needed to prevent the battery pack from being too hot to affect use, resulting in the temperature regulation system for the energy storage module of existing hybrid vehicles occupying a large amount of space and increasing the burden on the vehicle body.

[0004] In summary, hybrid vehicles have a more complex temperature control system than pure electric vehicles and pure fuel vehicles, with a complex overall structure and a large occupied space. SUMMARY

[0005] The present application provides a temperature regulation system and method for an energy storage module and a vehicle to solve the technical problem of a complex structure and large occupied space of the temperature regulation system for the energy storage module of existing hybrid vehicles, while ensuring the installation of the oil tank and battery pack and achieving efficient temperature control.

[0006] In view of the above problems, the present application is proposed to provide a temperature regulation system and method for an energy storage module and a vehicle that overcome the above problems or at least partially solve the above problems.

[0007] In a first aspect, a temperature regulation system for an energy storage module is provided, which is arranged in a vehicle. The temperature regulation system for the energy storage module includes an oil tank, a battery pack assembly, a heater, and a controller. The battery pack assembly includes a heat exchange pipe, a battery module, and a first temperature sensor. The battery module is in contact with the heat exchange pipe. When the vehicle is not in a fuel driving state, a first circulation loop is formed by the oil tank, the heat exchange pipe, and an oil line. The controller is electrically connected to the first temperature sensor and the heater. The first temperature sensor is used to collect the temperature of the battery module.

[0008] The controller is configured to start the heater to heat the fuel flowing into the heat exchange pipe when the temperature of the battery module is lower than a first temperature threshold, and stop the heater to stop heating the fuel flowing into the heat exchange pipe when the temperature of the battery module is higher than a second temperature threshold.

[0009] Optionally, the oil circuit pipeline comprises a first oil circuit pipeline and a second oil circuit pipeline, the oil outlet of the oil tank, the first oil circuit pipeline and the inlet of the heat exchange pipe are sequentially communicated, and the outlet of the heat exchange pipe, the second oil circuit pipeline and the oil inlet of the oil tank are sequentially communicated.

[0010] The vehicle is provided with an engine, and when the vehicle is in a fuel driving state, the engine, the second oil circuit pipeline and the heat exchange pipe are sequentially communicated.

[0011] The second oil circuit pipeline is provided with a cooling module and a second temperature sensor, and the second temperature sensor is configured to collect the temperature of the fuel flowing into the engine when the vehicle is in the fuel driving state; and the controller is configured to control the cooling module to cool the fuel flowing into the engine when the second temperature sensor detects that the temperature of the fuel flowing into the engine is higher than a third temperature threshold.

[0012] Optionally, the cooling module comprises a cooling tank, a radiator and a water pump, the radiator and the cooling tank are communicated by a water pipe to form a second circulation loop, the oil circuit pipeline passes through the cooling tank, the controller is electrically connected with the water pump and the radiator, and the controller is specifically configured to control the radiator to cool the water flowing into the cooling tank when the temperature of the fuel flowing into the engine is higher than the third temperature threshold.

[0013] Optionally, the oil circuit pipeline further comprises a third oil circuit pipeline, the third oil circuit pipeline is connected in parallel with the cooling module, a valve is arranged on the third oil circuit pipeline, the valve is electrically connected with the controller, and the controller controls the valve to be closed when the second temperature sensor detects that the temperature of the fuel flowing into the engine is higher than the third temperature threshold.

[0014] Optionally, a stop valve is arranged on the second oil circuit pipeline, the stop valve is electrically connected with the controller, and the controller is configured to control the stop valve to be opened to make the first circulation loop communicated when the vehicle is not in the fuel driving state.

[0015] Optionally, an oil pump and an oil level sensor are arranged in the oil tank, the outlet of the oil pump, the oil circuit pipeline and the inlet of the heat exchange pipe are sequentially communicated, and the heater comprises heating wires arranged in the oil tank, the heating wires are arranged along the extension direction of the oil pump and are in contact with the oil pump, the oil level sensor and each heating wire are electrically connected with the controller, and the controller controls the corresponding heating wire to be heated according to the fuel level detected by the oil level sensor.

[0016] Optionally, the first temperature threshold is 0℃-10℃, and the second temperature threshold is 40℃-50℃.

[0017] Optionally, the number of heat exchange pipes, battery modules and first temperature sensors is N, wherein N is an integer greater than 1; the N heat exchange pipes are arranged in parallel in the battery pack, each heat exchange pipe is in contact with one battery module, a throttle valve is arranged on the heat exchange pipe, the throttle valve is electrically connected with the controller, and the controller is configured to open the throttle valve to make the heated fuel flow into the heat exchange pipe when the temperature of the battery module is lower than a set first temperature threshold, and open the throttle valve to stop the heated fuel from flowing into the heat exchange pipe when the temperature of the battery module is higher than a set second temperature threshold.

[0018] In a second aspect, a temperature regulation method of an energy storage module is provided, which is applied to the temperature regulation system of the energy storage module in the first aspect, and the method comprises the following steps:

[0019] The first temperature sensor collects the temperature of the battery module.

[0020] The controller opens the heater to heat the fuel flowing into the heat exchange pipe when the temperature of the battery module is lower than a set first temperature threshold, and closes the heater to stop heating the fuel flowing into the heat exchange pipe when the temperature of the battery module is higher than a set second temperature threshold.

[0021] In a third aspect, a vehicle is provided, which comprises the temperature regulation system of the energy storage module in the first aspect.

[0022] The technical scheme provided in the embodiments of the present application has at least the following technical effects or advantages:

[0023] The temperature regulation system, method and vehicle of the energy storage module provided in the embodiments of the present application have the following technical effects or advantages.

[0024] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting, of the application. Like reference numerals have been used wherever possible throughout the drawings and the following detailed description, to refer to like parts. In the drawings:

[0026] Figure 1 A schematic diagram of a temperature regulation system for a power storage module in an embodiment of the application;

[0027] Figure 2 A schematic diagram of a temperature regulation system for a power storage module in a plug-in hybrid vehicle;

[0028] Figure 3 A side view of a power storage module installation structure in a plug-in hybrid vehicle in an embodiment of the application;

[0029] Figure 4 A heater installation structure diagram in an embodiment of the application;

[0030] Figure 5 A heater wire installation structure diagram in an embodiment of the application;

[0031] Figure 6 A heat exchange pipe installation structure diagram in a battery pack in an embodiment of the application;

[0032] Figure 7 A vehicle bottom view diagram in an embodiment of the application;

[0033] Figure 8 A temperature control flowchart of a power storage module in an embodiment of the application. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings.

[0035] Various structural diagrams according to embodiments of the present disclosure are shown in the drawings. These diagrams are not drawn to scale, in which certain details are exaggerated for the purpose of clarity and certain details can be omitted. The shapes of various regions, layers, and their relative sizes and positional relationships shown in the drawings are merely exemplary, and in actuality can be deviated due to manufacturing tolerances or technical limitations, and regions / layers with different shapes, sizes, and relative positions can be additionally designed by those skilled in the art according to actual needs.

[0036] To better understand the above technical solutions, the following will describe the above technical solutions in detail with reference to specific implementation methods. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0037] This invention provides a temperature regulation system for an energy storage module, installed in a vehicle. Please refer to [link / reference needed]. Figure 1 , Figure 1 This is a schematic diagram of the temperature regulation system of the energy storage module in an embodiment of the present invention. The temperature regulation system of the energy storage module includes: a fuel tank 1, a battery pack assembly 2, a fuel line 3, a heater 4, and a controller 5. The battery pack assembly includes a heat exchange pipe 201, a battery module 202, and a first temperature sensor 203. The battery module 202 is in contact with the heat exchange pipe 201. When the vehicle is not in a fuel-driven state, the fuel tank, the heat exchange pipe 201, and the fuel line are connected to form a first circulation loop. The controller 5 is electrically connected to the first temperature sensor 203 and the heater 4, respectively. The first temperature sensor 203 is used to collect the temperature of the battery module 202. The controller 5 is used to turn on the heater 4 to heat the fuel flowing into the heat exchange pipe 201 when the temperature of the battery module 202 is lower than a set first temperature threshold; and to turn off the heater 4 to stop heating the fuel flowing into the heat exchange pipe 201 when the temperature of the battery module 202 is higher than a set second temperature threshold.

[0038] Specifically, the first temperature threshold represents the lower limit of the normal operating temperature range of the battery pack, and the second temperature threshold represents the upper limit of the normal operating temperature range of the battery pack. Typically, the first temperature threshold is 0℃~10℃, and the second temperature threshold is 40℃~50℃. The normal operating temperature of the battery pack is 0℃~45℃, meaning the first temperature threshold is 0℃ and the second temperature threshold is 45℃. With the development of battery technology, the normal operating temperature range of the battery is becoming increasingly wider, which will not be elaborated upon here.

[0039] Hybrid vehicles use fuel tanks and battery packs as energy storage modules, integrating two powertrains into a single vehicle. They can be categorized as plug-in hybrids and non-plug-in hybrids based on whether charging is required, and as series, parallel, and series-parallel hybrids based on the power transmission route in their system structure. Existing pure electric and pure gasoline vehicles rely on water-cooling systems for cooling. Hybrid vehicles combine the water-cooling systems of both pure electric and pure gasoline vehicles to regulate the temperature of the fuel tank (1) and battery pack (2). Water-cooling systems typically require water pipes, water pumps, coolant, heat exchangers, and heaters, resulting in a complex temperature control system structure and low temperature control efficiency in hybrid vehicles. The technical solution provided in this invention uses fuel in the fuel tank as the coolant for temperature regulation, avoiding the need for a separate coolant. The fuel pump in the fuel tank drives the fuel to circulate in the fuel circulation loop, eliminating the need for a water pump, thus simplifying the vehicle's weight and achieving a more efficient temperature control strategy.

[0040] Currently, there are four main types of hybrid technologies commonly found on the market: MHEV (Mild Hybrid Electric Vehicle), HEV (Hybrid Electric Vehicle), PHEV (Plug-in Hybrid Electric Vehicle), and REEV (Range Extender Electric Vehicle).

[0041] MHEV mild hybrid vehicles add a 48V electrical system to the existing vehicle structure. The system mainly consists of three parts: a BSG (engine belt-driven motor) or ISG (integrated starter motor), a 48V battery, and a DC / DC converter (transformer). During driving, it can store energy recovered from braking and assist the engine during start-up and acceleration, thus achieving "mild" fuel savings and improved smoothness. The 48V mild hybrid system is simple in structure and low in cost, but its development threshold is not high.

[0042] HEV (Hybrid Electric Vehicle) battery packs cannot be connected to external power sources, and due to their small battery capacity, their pure electric range is relatively short. In most cases, the vehicle is driven by the combination of an electric motor and an engine, depending on different operating conditions.

[0043] Compared to HEV (hybrid electric vehicle), PHEV (plug-in hybrid electric vehicle) has a more complex structure, can be charged by an external power source, and has a larger capacity battery, thus requiring more battery installation space.

[0044] REEV extended-range hybrid vehicle is a vehicle that uses the engine to generate electricity and the motor to drive. When the battery pack has sufficient power, it travels in pure electric mode, and when the power is insufficient, the engine in the vehicle starts to drive the generator to charge the power battery and provide power for the motor to operate (i.e. extended-range mode). The structure of the REEV extended-range hybrid vehicle is almost the same as that of the plug-in hybrid, but the biggest difference is that the engine of the extended-range hybrid vehicle is only responsible for generating electricity for the motor, and the motor is actually driving the wheels.

[0045] In general, the HEV oil-electric hybrid vehicle is between light hybrid and strong hybrid, and the driving force mainly comes from the engine; the motor in the MHEV light hybrid vehicle is more responsible for some "odd jobs" during vehicle travel, and the oil-saving effect is general; the PHEV plug-in hybrid vehicle has two sets of power systems of fuel vehicles and electric vehicles, and the motor drives the oil consumption to be low; the REEV extended-range hybrid vehicle system is relatively simple, and the engine does work completely converted into electric energy, and then the motor directly drives the vehicle. Among them, the PHEV plug-in hybrid vehicle model can choose pure electric mode for short distance and hybrid mode for long distance with two sets of power systems, which can not only travel environmentally friendly but also reduce range anxiety; reverse power supply expands the use of the vehicle model; the displacement of the fuel engine is lower, which not only guarantees sufficient power but also enhances the economic advantage of the vehicle, which is deeply loved by the public. No matter which kind of hybrid vehicle, the battery pack needs to be cooled down when the temperature rises in summer and needs to be heated up in winter.

[0046] The following takes the PHEV plug-in hybrid vehicle as an example, and the attached Figures 2 to 8 The technical scheme of the embodiment is described in detail.

[0047] The temperature regulation system of the energy storage module of the plug-in hybrid vehicle includes an oil tank 1, a battery pack assembly 2, an oil line pipeline 3, a heater 4, and a controller 5. In the above implementation scheme, the oil tank, the heat exchange pipe 201, and the oil line pipeline are connected to form a first circulation loop when the vehicle is not in a fuel driving state. The controller 5 is electrically connected with the first temperature sensor 203 and the heater 4, and the first temperature sensor 203 is used to collect the temperature of the battery module 202. The controller 5 is used to start the heater 4 to heat the fuel flowing into the heat exchange pipe 201 when the temperature of the battery module 202 is lower than a set first temperature threshold, and to stop the heater 4 to stop heating the fuel flowing into the heat exchange pipe 201 when the temperature of the battery module 202 is higher than a set second temperature threshold.

[0048] Similar to fuel vehicles, the oil tank and the battery pack assembly of the hybrid vehicle will have a temperature rise during operation. For the oil tank 1, the excessive temperature will cause the oil evaporation to increase, the oil consumption to be fast, and the oil to be thin under the influence of the high temperature, so that a perfect lubricating film cannot be formed at the lubricating parts, thereby causing the friction to increase and the parts in the engine to be more easily worn. In some places, dry friction will even occur. The excessive temperature will also cause the gasoline and the oil to produce carbon deposition and sintering, some of which will directly affect the combustion reaction and cause the power of the vehicle to decrease, some of which will enter the clearance and accelerate the wear of the parts, and some of which will even cause the parts to be damaged. The excessive temperature will also cause the engine of the hybrid vehicle to lose more power.

[0049] For the battery pack assembly, the excessive temperature will cause the service life of the battery in the battery pack to decrease and the charging safety to decrease. Similarly, in special cases, for example, in cold seasons, the temperature of the oil tank and the battery pack assembly of the hybrid vehicle will be very low. When the temperature of the oil tank is very low, the low-temperature fuel entering the engine will cause the engine to be unable to start and run normally, and when the temperature of the battery is too low, the metal in the battery will be deposited, thereby causing the battery to be internally short-circuited, especially the lithium iron phosphate ion battery. Generally, the capacity of the lithium iron phosphate ion battery at 0℃ is only about 60-70%, and the capacity of the lithium iron phosphate ion battery at -20℃ is only about 20-40%.

[0050] Therefore, under extremely cold and extremely hot conditions, the oil tank and the battery pack assembly are not suitable for use, and therefore a temperature control system needs to be arranged to control the temperature, so that the temperature of the oil tank and the battery pack assembly cannot exceed the highest and lowest limit temperatures. The hybrid vehicle adopts the energy storage module provided by the embodiment of the present application, which heats the battery in the battery pack assembly while the fuel in the oil tank 1 circulates in the oil circulation circuit, thereby achieving efficient temperature regulation of the energy storage module.

[0051] Specifically, as shown in Figure 2 Figure 2 ​The schematic diagram of the temperature regulation system of the energy storage module of the plug-in hybrid vehicle; the oil circuit pipeline 3 comprises a first oil circuit pipeline 301 and a second oil circuit pipeline 302, the oil outlet of the oil tank 1, the first oil circuit pipeline 301 and the inlet of the heat exchange pipe 201 are sequentially communicated, the outlet of the heat exchange pipe 201, the second oil circuit pipeline 302 and the oil inlet of the oil tank are sequentially communicated. The vehicle is provided with an engine 6, when the vehicle is in the fuel driving state, the engine 6, the second oil circuit pipeline 302 and the heat exchange pipe 201 are sequentially communicated. The second oil circuit pipeline 302 is provided with a cooling module and a second temperature sensor 306, the second temperature sensor 306 is used for collecting the fuel temperature flowing into the engine 6 when the vehicle is in the fuel driving state; the controller 5 is used for controlling the cooling module to cool the fuel flowing into the engine 6 when the second temperature sensor 306 detects that the fuel temperature flowing into the engine 6 is higher than the set third temperature threshold. Figure 2 The dashed line in the figure represents the oil circuit circulation or the water circuit circulation, and the solid line represents the controller electrical connection relationship.

[0052] From Figure 2 It can be seen that the oil outlet of the oil tank 1 is communicated with the first oil circuit pipeline 301, the oil inlet of the oil tank 1 is communicated with the second oil circuit pipeline 302, the second oil circuit pipeline 302 is provided with a stop valve 303, the stop valve 303 is electrically connected with the controller 5, and the controller 5 is used for controlling the electric control stop valve 303 to open when the vehicle is not in the fuel driving state, so that the first circulation loop is communicated. When the energy storage module has no temperature control requirement, the stop valve 303 is closed, the first circulation loop is closed, and the fuel in the oil tank 1 can directly enter the engine 6 of the power system.

[0053] The cooling module provided on the second oil circuit pipeline 302 comprises a cooling tank 7, a radiator 8 and a water pump 9, the radiator 8 and the cooling tank 7 are communicated through the water pipe to form a second circulation loop, the second oil circuit pipeline 302 passes through the cooling tank 7, the controller 5 is electrically connected with the water pump 9 and the radiator 8, and the controller 5 is specifically used for controlling the radiator to cool the water flowing into the cooling tank 7 when the fuel temperature flowing into the engine 6 is higher than the set third temperature threshold. The third temperature threshold represents the upper limit of the fuel temperature injected into the engine 6. Usually, the third temperature threshold can be taken in the range of 105-110 degrees Celsius.

[0054] When the fuel cools the battery pack 2, the fuel temperature of the second oil circuit pipeline 302 is very high, if the fuel needs to be sent into the engine 6 at this time, the cooling tank 7 needs to be cooled, the cooling tank 7 is used for taking away the heat in the fuel, therefore, a plate heat exchanger can be used, the radiator 8 can be cooled by cooling the water in the second circulation loop of the water, which is not limited here. When the second temperature sensor 306 detects that the oil temperature is too high and does not meet the oil temperature of the engine 6, the oil is cooled through the plate heat exchanger and the external cooling water circuit, and then enters the engine 6.

[0055] like Figure 7 As shown, Figure 7 This is a schematic diagram of the vehicle's underside in an embodiment of the invention; the cooling box 7 is installed at the front end of the vehicle floor 10, located in front of the battery pack assembly 2. When the fuel temperature in the first circulation loop is too high, the cooling box 7 cools the fuel in the fuel line 3, and the radiator 8 provides cooling water to the cooling box 7 through the second circulation loop. The external radiator 8 and cooling box 7 cool the heated fuel before it enters the engine 6. When the remaining fuel level is insufficient for the engine 6, the fuel supply to the engine 6 is stopped. The fuel can circulate repeatedly through the first circulation loop to cool the battery pack assembly 2, and the stored electricity in the battery pack provides driving power to the vehicle body.

[0056] from Figure 2 As can be seen, the oil circuit also includes a third oil circuit pipe 304, which is connected in parallel with the cooling box 7. A valve 305 is installed on the third oil circuit pipe 304, and the valve 305 is electrically connected to the controller 5. When the second temperature sensor 306 detects that the fuel temperature flowing into the engine 6 is higher than a set third temperature threshold, the controller 5 controls the valve to close. The third temperature threshold represents the upper limit of the fuel temperature for normal engine operation. The third oil circuit pipe 304 is connected in parallel outside the cooling box 7. After the fuel flows out of the heat exchange pipe 201 of the battery pack assembly 2, the second temperature sensor 306 on the oil circuit pipe 3 detects the oil temperature. If the oil temperature meets the inlet temperature requirements of the engine 6, the fuel can flow directly into the engine 6 through the third oil circuit pipe 304 without passing through the cooling box 7.

[0057] like Figure 3 As shown, Figure 3 This is a side view of the energy storage module installation structure of a plug-in hybrid vehicle in an embodiment of the present invention. A longitudinal beam 11 is provided on the front side of the vehicle floor 10, and the two sides of the battery pack assembly 2 are connected to the longitudinal beam 11, thereby installing the battery pack assembly 2 at the bottom of the vehicle. The fuel tank 1 is installed on the rear side of the floor 10, located in the space under the second row of seats. This not only achieves the installation of the fuel tank 1 and the battery pack assembly 2 at a certain safe height, but also ensures that there is enough space for leg movement inside the vehicle.

[0058] Specifically, such as Figure 4 As shown, Figure 4 This is a diagram showing the heater installation structure in an embodiment of the present invention; an oil pump 101 and an oil level sensor (a common accessory for oil tanks, often called a float, not shown in the diagram) are installed inside the oil tank. The outlet of the oil pump 101, the first oil circuit pipe 301, and the inlet of the heat exchange tube 201 are sequentially connected. Figure 5 As shown, Figure 5Figure 1 is a schematic diagram of the heating wire installation structure in the embodiment of the present application; the heater 4 comprises heating wires 401 arranged in the oil tank 1, the multiple sections of the heating wires 401 are arranged along the extension direction of the oil pump 101 and are in contact with the oil pump 101, the oil level sensor, each section of the heating wires 401 and the controller 5 are electrically connected, the oil level sensor is very light and floats on the oil surface, and the amount of kerosene is transmitted to the controller as the oil level sensor is raised or lowered. The multiple sections of the electrically controlled heating wires 401, the oil level sensor of the oil tank 1 and the oil pump 101 are linked and controlled by the controller 5, and the controller 5 controls the heating of the corresponding heating wires 401 according to the amount of fuel detected by the oil level sensor.

[0059] The above scheme is equivalent to making the oil pump 101 body in the oil tank 1 internally self-provided with pressure control type segmented heating wires 401. When the ambient temperature is low and the battery pack assembly 2 needs to be heated, the oil level sensor sends the oil amount data in the oil tank 1 to the controller 5, and the controller 5 controls the heater 4 to turn on the heating wires 401 of the corresponding heating section, so as to realize graded heating according to the amount of fuel. The oil pump 101 is used to pump oil to the heat exchange pipes 201 inside the battery pack assembly 2, so as to heat the battery pack assembly 2.

[0060] The above scheme is used on a PHEV plug-in hybrid vehicle, and fuel from the fuel tank 1 is directly used to cool and heat the battery pack assembly 2. When the battery pack assembly 2 and the fuel system need to be preheated in cold weather, the electrically controlled heating wires 401 are powered to generate heat, and the fuel near the oil pump 101 in the oil tank 1 is heated. Because the oil pump 101 first pumps the fuel near the oil pump 101, and the heating is also near the oil pump 101, the heating effect is good. As shown in Figure 5 The heating wires 401 are divided into upper, middle and lower sections, and the heating wires 401 at the corresponding positions are automatically turned on according to the amount of oil in the oil tank 1. For example, when the oil level sensor detects that the fuel in the oil tank 1 is only one third, the controller 5 controls the heater 4 to turn on only the lower section of the heating wires 401 to heat the fuel, so as to prevent waste of heat.

[0061] As an optional implementation, the number of the heat exchange pipes 201, the battery modules 202 and the first temperature sensors 203 is N, where N is an integer greater than 1. The N heat exchange pipes 201 are arranged in parallel in the battery pack, and each heat exchange pipe 201 is in contact with one battery module 202. Here, the battery module 202 can be understood as a combination of batteries arranged on the same heat exchange pipe 201. As shown in Figure 2As shown, the heat exchange pipe 201 is provided with a throttle valve 204, the throttle valve 204 is electrically connected with the controller 5, the controller 5 is used to open the throttle valve 204 when the temperature of the battery module 202 is lower than the set first temperature threshold, so that the heated fuel flows into the heat exchange pipe 201; when the temperature of the battery module 202 is higher than the set second temperature threshold, the throttle valve 204 is opened, so that the heated fuel stops flowing into the heat exchange pipe 201, and the throttle valve is an electric control throttle valve.

[0062] As shown, Figure 6 As shown, Figure 6 The installation structure diagram of the heat exchange pipe 201 in the battery pack in the embodiment of the application; three heat exchange pipes 201 are arranged in a serpentine or S shape in the battery pack assembly 2, the heat exchange pipe 201 is in contact with the battery module 202 in the battery pack assembly 2 to transfer heat, the floor of the battery pack assembly 2 is provided with an oil cooling plate, fuel is injected into the oil cooling plate, and the oil path forms a plurality of oil path branches along the arrangement of the heat exchange pipe 201. One heat exchange pipe 201 corresponds to one battery module 202, and the battery module 202 here can be understood as a battery combination arranged on the same heat exchange pipe 201, and each battery module 202 is provided with a first temperature sensor 203, the battery module 202 with a temperature exceeding a standard is distinguished through the first temperature sensor 203, and the controller 5 opens the throttle valve 204 on the heat exchange pipe 201 corresponding to the battery module 202 according to the detection result of the first temperature sensor 203, so as to control the flow direction of the oil path branch in the battery pack assembly 2, and a more efficient temperature control strategy is achieved.

[0063] In the battery pack assembly 2, the battery module 202 is arranged in the upper part, and the heat exchange pipe 201 constituting the oil path branch in the inside is arranged in the lower part, which is not easy to leak, and in hot weather, the fuel is cooled to the battery pack assembly 2 through the passage in the lower part, compared with the traditional cooling, the system can directly use the oil pump 101, and the fuel is directly used by the engine 6, and there is no water pump of the water cooling system required in the past. From Figure 6 It can also be seen that the longitudinal beam 11 on the front side of the vehicle floor has two parallel longitudinal beams, and the two sides of the battery pack assembly 2 are connected with the longitudinal beam 11, so that the battery pack assembly 2 is installed on the bottom of the vehicle.

[0064] It is to be understood that, in describing embodiments of the invention, that which is meant by specifications of material or process characteristics is that which is within the skill of the art unless specifically stated otherwise. It is also to be understood that, where used in the specification, including the dependent claims, the terms "comprises", "comprising", "includes", "including" or the like are not used in the sense of "consists only of, "consisting only of, or "consisting of, but rather in the sense of "including, or "including at least the recited elements or steps.

[0065] Based on the same inventive concept, the embodiments of the present application also provide a temperature control method of the energy storage module, as shown in Figure 8 Figure 8 The flow chart of the temperature control method of the energy storage module in the embodiments of the present application is applied to the temperature control system of the energy storage module described above, and the method comprises the following steps:

[0066] The first temperature sensor 203 collects the temperature of the battery module 202; the controller 5 starts the heater 4 to heat the fuel flowing into the heat exchange pipe 201 when the temperature of the battery module 202 is lower than the set first temperature threshold; and the heater 4 is turned off to stop heating the fuel flowing into the heat exchange pipe 201 when the temperature of the battery module 202 is higher than the set second temperature threshold.

[0067] That is, when the battery pack assembly 2 of the energy storage module needs to be heated, the heater 4 heats the fuel upstream of the battery pack assembly 2, and the heated fuel enters the heat exchange pipe 201 through the oil circulation loop and heats the battery module 202 in the battery pack assembly 2.

[0068] When the battery pack assembly 2 of the energy storage module needs to be cooled, the heater 4 is in an off state, and the fuel enters the heat exchange pipe 201 through the oil circulation loop and cools the battery module 202 in the battery pack assembly 2.

[0069] When the fuel temperature in the oil line pipe 3 exceeds the engine 6 oil inlet temperature or the oil tank 1 limit temperature, the fuel in the oil line pipe 3 is cooled by the cooling module.

[0070] The hybrid power vehicle uses the oil tank and the battery pack assembly as the energy storage module, and the existing pure electric vehicle and pure fuel vehicle are cooled by the water cooling system. The hybrid electric vehicle combines the water cooling systems of the pure electric vehicle and the pure fuel vehicle to control the temperature of the oil tank 1 and the battery pack assembly 2. The above-mentioned temperature control method of the energy storage module is based on Figures 1 to 7 ​The technical scheme provided by the embodiment of the present application is to take the fuel in the oil tank 1 as the cooling liquid to perform temperature regulation, avoids the use of the cooling liquid, takes the oil pump of the oil tank 1 to drive the fuel to circulate in the oil circulation loop, avoids the use of the water pump, thereby simplifying the weight of the automobile, and achieving a more efficient temperature control strategy. Avoiding the assembly of the water cooling pipe, the water pump, the water cooling liquid, the heat exchanger, the heater and the like in the water cooling system of the existing pure electric vehicle and fuel vehicle, so that the temperature control system structure of the hybrid power vehicle is complex, and the temperature control efficiency is low.

[0071] Based on the same inventive concept, the embodiment of the present application also provides a vehicle comprising the temperature regulation system of the energy storage module.

[0072] The technical scheme provided by the embodiment of the present application has at least the following technical effects or advantages:

[0073] The temperature regulation system, method and vehicle of the energy storage module provided by the embodiment of the present application, on the one hand, the heater is arranged in the energy storage module of the oil tank and the battery pack, the heat exchange pipes of the oil tank and the battery pack are connected to form an oil circulation loop through the oil pipeline, the heater is arranged on the oil circulation loop, the fuel in the oil tank is taken as the cooling liquid to regulate the temperature of the battery pack, the use of the traditional cooling liquid is avoided, the oil pump of the oil tank drives the fuel to circulate in the oil circulation loop, the use of the water pump in the traditional cooling system to circulate the cooling liquid is avoided, thereby simplifying the weight of the automobile, and achieving a more efficient temperature control strategy. Further, the multi-section heating wire is arranged along the extension direction of the oil pump, the multi-section heating wire, the oil level sensor of the oil tank and the oil pump are linked and controlled through the controller, when the battery pack needs to be heated, the oil level sensor sends the oil amount data in the oil tank to the controller, the controller controls the heater to start the heating wire corresponding to the fuel liquid level to heat, thereby realizing the step-by-step heating according to the amount of fuel.

[0074] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0075] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps other than those listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unitary claim, several devices or items can be listed, comprising at least one unique device or item. However, these several devices or items can be physically implemented by one and the same item, which can be referred to by several names.

Claims

1. A temperature regulation system for an energy storage module, comprising: The temperature adjusting system of the energy storage module arranged in the vehicle comprises an oil tank, a battery pack assembly, an oil circuit pipeline, a heater and a controller. The battery pack assembly comprises a heat exchange pipe, a battery module and a first temperature sensor. The battery module is in contact with the heat exchange pipe. When the vehicle is not in a fuel driving state, the oil tank, the heat exchange pipe and the oil circuit pipeline are connected to form a first circulation loop. The controller is electrically connected with the first temperature sensor and the heater. The first temperature sensor is used to collect the temperature of the battery module. When the temperature of the battery module is lower than a set first temperature threshold, the controller starts the heater to heat the fuel flowing into the heat exchange pipe. When the temperature of the battery module is higher than a set second temperature threshold, the controller stops the heater to stop heating the fuel flowing into the heat exchange pipe. The oil circuit pipeline comprises a first oil circuit pipeline and a second oil circuit pipeline. The oil outlet of the oil tank, the first oil circuit pipeline and the inlet of the heat exchange pipe are sequentially connected. The outlet of the heat exchange pipe, the second oil circuit pipeline and the oil inlet of the oil tank are sequentially connected. The vehicle is provided with an engine. When the vehicle is in a fuel driving state, the engine, the second oil circuit pipeline and the heat exchange pipe are sequentially connected. The second oil circuit pipeline is provided with a cooling module and a second temperature sensor. The second temperature sensor is used to collect the temperature of the fuel flowing into the engine when the vehicle is in a fuel driving state. When the second temperature sensor detects that the temperature of the fuel flowing into the engine is higher than a set third temperature threshold, the controller controls the cooling module to cool the fuel flowing into the engine.

2. The temperature regulation system of an energy storage module of claim 1, wherein, The cooling module comprises a cooling tank, a radiator and a water pump. The radiator and the cooling tank are connected by a water pipeline to form a second circulation loop. The oil circuit pipeline passes through the cooling tank. The controller is electrically connected with the water pump and the radiator. When the temperature of the fuel flowing into the engine is higher than a set third temperature threshold, the controller controls the radiator to cool the water flowing into the cooling tank.

3. The temperature regulation system of an energy storage module of claim 1, wherein, The oil circuit pipeline further comprises a third oil circuit pipeline. The third oil circuit pipeline is connected in parallel with the cooling module. A valve is arranged on the third oil circuit pipeline. The valve is electrically connected with the controller. When the second temperature sensor detects that the temperature of the fuel flowing into the engine is higher than a set third temperature threshold, the controller controls the valve to be closed.

4. The temperature regulation system of an energy storage module of claim 1, wherein, A stop valve is arranged on the second oil circuit pipeline. The stop valve is electrically connected with the controller. When the vehicle is not in a fuel driving state, the controller controls the stop valve to be opened to make the first circulation loop be connected.

5. The temperature regulation system of an energy storage module of claim 1, wherein, The oil tank is provided with an oil pump and an oil level sensor, an outlet of the oil pump, the oil circuit pipeline and an inlet of the heat exchange pipe are sequentially connected; the heater comprises a heating wire arranged in the oil tank, a plurality of sections of the heating wire are arranged along the extension direction of the oil pump and are in contact with the oil pump, the oil level sensor and each section of the heating wire are electrically connected with the controller, and the controller controls the corresponding heating wire corresponding to the fuel level to heat when the fuel amount detected by the oil level sensor.

6. The temperature regulation system of an energy storage module of claim 1, wherein, The first temperature threshold is 0-10℃, and the second temperature threshold is 40-50℃.

7. The temperature regulation system of an energy storage module of claim 1, wherein, The number of the heat exchange pipes, the battery modules and the first temperature sensors is N, wherein N is an integer greater than 1; N heat exchange pipes are arranged in parallel in the battery pack, each heat exchange pipe is in contact with one battery module, a throttle valve is arranged on the heat exchange pipe, the throttle valve is electrically connected with the controller, and the controller is used to open the throttle valve to make the heated fuel flow into the heat exchange pipe when the temperature of the battery module is lower than the set first temperature threshold, and to open the throttle valve to stop the heated fuel from flowing into the heat exchange pipe when the temperature of the battery module is higher than the set second temperature threshold.

8. A method of temperature regulation of an energy storage module, characterized by, The temperature regulation system applied to the energy storage module of any one of claims 1-7, the method comprises: The first temperature sensor collects the temperature of the battery module; The controller opens the heater to heat the fuel flowing into the heat exchange pipe when the temperature of the battery module is lower than the set first temperature threshold, and closes the heater to stop heating the fuel flowing into the heat exchange pipe when the temperature of the battery module is higher than the set second temperature threshold.

9. A vehicle characterized by comprising: The temperature regulation system comprising the energy storage module of any one of claims 1-7.

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