Battery warming-up device of hybrid electric vehicle, control method and hybrid electric vehicle

Abstract

The invention discloses a battery warming-up device of a hybrid electric vehicle, a control method and the hybrid electric vehicle, and the battery warming-up device comprises a heating assembly which comprises a working box, a fan and an electric heating element which are arranged in the working box, and an air inlet pipeline used for being communicated with an engine compartment; the heat supply assembly is communicated with the heating assembly and is used for accommodating a battery and transferring heat; wherein the device is configured to have the following working modes: in the initial starting stage of the vehicle, the electric energy of the battery is used for driving the fan and the electric heating element to generate hot air to warm up the battery; and in the second working mode, after the engine is started, waste heat from the engine compartment is switched to be used for warming the battery. The hybrid electric vehicle can still show excellent cruising ability and power performance in severe cold areas, the application range of the product is widened, and the requirements of wider user groups are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile battery, in particular to a battery warming device of a hybrid electric vehicle, a control method and the hybrid electric vehicle. BACKGROUND

[0002] The common cat scratching board on the market is mostly fixed size corrugated board or column type structure, which has single function and is difficult to adjust size or shape flexibly according to use scene. Meanwhile, the existing cat climbing frame structure is mostly fixed assembly form, and the cat house part usually adopts fixed fence structure, which does not have adjustability or replaceability, resulting in poor use flexibility, large space occupation, and difficulty in cleaning or replacing. SUMMARY

[0003] TECHNICAL PROBLEM The purpose of the present application is to make up for the shortcomings of the prior art, and provide a battery warming device of a hybrid electric vehicle, a control method and the hybrid electric vehicle.

[0004] TECHNICAL SCHEME In order to achieve the above purpose, the present application provides the following technical scheme: a battery warming device of a hybrid electric vehicle, comprising: A heating assembly comprising a working box, a fan and an electric heating element arranged in the working box, and an air inlet pipeline for communicating with an engine compartment; A heat supply assembly in communication with the heating assembly for accommodating a battery and transferring heat; Wherein, the device is configured to have: A first working mode: in the initial stage of vehicle starting, the electric energy of the battery is used to drive the fan and the electric heating element to generate hot air to warm up the battery; A second working mode: after the engine is started, the waste heat from the engine compartment is used to warm up the battery.

[0005] The electric heating element is a positive temperature coefficient resistor.

[0006] The working box is provided with a spoiler, and the spoiler comprises a plurality of staggered distribution of partitions and layers to prolong the airflow path and increase the contact area with the electric heating element.

[0007] The first one-way valve is arranged on the air inlet pipeline to prevent the gas in the working box from flowing back to the engine compartment.

[0008] The air inlet of the working box is provided with a second one-way valve and a filter screen.

[0009] The heat supply assembly comprises a battery shell, a sealed box and a heat conducting inner container arranged from outside to inside, and a heat preservation and insulation layer is arranged between the sealed box and the battery shell.

[0010] The heat-conducting inner container is made of copper-zinc alloy, and a plurality of air outlet holes are formed on the surface thereof.

[0011] The control unit is configured to automatically switch the first working mode and the second working mode based on the working state of the engine and / or the temperature of the engine compartment.

[0012] The application further provides a control method of the battery warming device for the hybrid vehicle, comprising: detecting a vehicle starting signal; In the initial stage of starting the vehicle, the battery warming device is controlled to enter the first working mode, and the electric heating warming is performed by using the battery electric energy; After detecting that the engine is started and runs stably, the battery warming device is controlled to switch to the second working mode, the warming is performed by using the engine waste heat, and the electric heating is stopped.

[0013] The application further provides a hybrid vehicle, characterized by being equipped with the battery warming device.

[0014] Advantages: Compared with the prior art, the application has the following advantages: The application enables the hybrid vehicle to also exhibit excellent endurance and power performance in cold regions, widens the application region of the product, and meets the needs of a wider user group, and is a key technology for improving the comprehensive competitiveness of the product.

[0015] Other advantages, objects, and features of the application will be set forth in part in the following specification taken in conjunction with the accompanying drawings, and in part will become apparent to those skilled in the art from a consideration of the following specification and drawings, or can be learned from the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the battery warming device for the hybrid vehicle and the use method thereof.

[0017] Figure 2 It is a rear view schematic diagram of the battery warming device for the hybrid vehicle and the use method thereof.

[0018] Figure 3 It is a sectional view schematic diagram of the battery warming device for the hybrid vehicle and the use method thereof.

[0019] Figure 4 It is an exploded schematic diagram of the battery warming device for the hybrid vehicle and the use method thereof.

[0020] Figure 5Left view exploded schematic diagram of a battery warming device for a hybrid vehicle and method of use thereof.

[0021] In the drawings: 1, heating assembly; 11, working box; 12, fan; 13, connecting rod; 14, spoiler; 15, PTC resistor; 16, flange; 17, air outlet; 18, air inlet; 19, one-way air inlet valve; 110, filter screen; 111, air guide block; 2, heating assembly; 21, battery shell; 22, sealing box; 23, reinforcing block; 24, inner container; 25, air outlet; 26, air inlet; 27, air inlet. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] Embodiment one Please refer to Figures 1 to 5 The present application provides a battery warming device for a hybrid vehicle, which core idea is to solve the timeliness and economy of battery warming in a low-temperature environment through a dual-mode intelligent switching mechanism.

[0024] The device mainly consists of a heating assembly 1 and a heating assembly 2. The heating assembly 1 includes a working box 11, at least one fan 12 is arranged at the front end of the working box 11, the fan is stably installed on the inner wall of the box through a connecting rod 13, and the running is ensured to be stable. On the air outlet path of the fan, a specially designed spoiler 14 is fixed. The spoiler 14 is not a simple baffle, but is composed of a plurality of interlaced and staggered distribution of partitions and layers, forming a multi-channel, high-turbulence labyrinth flow channel. The PTC resistor 15 (i.e. electric heating element) is firmly installed in the flow channel. When the air flows through, it will be forced to change direction and speed, and fully and efficiently exchange heat with the PTC resistor 15.

[0025] The back of the working box 11 is communicated with an external air inlet pipe through a flange 16, and the pipe extends to the high-temperature area of the engine compartment. Keyly, a first one-way valve is integrated in the flange 16, which strictly ensures that the hot air in the engine compartment can flow in, but prevents any gas (which may contain battery volatile gas or wet cold air) in the working box from flowing back to the engine compartment, ensuring the safety and stability of the system.

[0026] The heat supply assembly 2 is responsible for efficiently and uniformly transferring heat to the battery. Its structural design fully considers the balance between heat preservation and heat conduction: the outer battery shell 21 provides mechanical protection; the middle sealed box 22 is made of stainless steel, and its outer surface is bonded with heat insulation cotton, forming a heat insulation layer that maximizes the reduction of heat loss to the outside; the inner heat conducting inner container 24 is also made of stainless steel or preferably copper-zinc alloy with better heat conductivity, and its surface is densely covered with air outlet holes 25. Supported and fixed by the reinforcing block 23, the rigidity of the structure is ensured. The working box 11 and the battery shell 21 are connected through the air outlet hole 17 and the air inlet hole one 26, and the sealed box 22 is provided with an air inlet hole two 27, thereby forming a complete and sealed hot air transfer channel.

[0027] The fan 12 is firmly connected to the inner wall of the working box 11 through the top and bottom connecting rods 13, ensuring the stability of the fan 12 during operation. At the air outlet end of the fan 12, the working box 11 is fixedly connected with a spoiler 14, which is carefully designed inside to accommodate a PCT resistor 15. The PCT resistor 15 can automatically adjust the heating power according to temperature changes. The back side of the working box 11 is provided with a flange plate 16, which is uniformly distributed with bolt holes on its surface, tightly connected with the external air inlet pipe through bolts, and the other end of the external air inlet pipe is ingeniously extended to the engine compartment for introducing heat generated during engine operation. The battery shell 21 of the heat supply assembly 2 is stably connected with the working box 11, and the air outlet holes 25 uniformly arranged on the surface of the inner container 24 are used to dissipate the heat required for warming up.

[0028] The air outlet hole 17, the air inlet hole one 26, and the air inlet hole two 27 form a complete air flow channel, ensuring the orderly transfer of heat within the device and improving the warming efficiency. The one-way air inlet valve one 19 prevents backflow of gas, and the filter screen 110 on the surface effectively blocks dust and other impurities, protecting the internal structure and prolonging the service life of the device. The spoiler 14 is designed with a partition and staggered distribution of layers, increasing the contact area and time of air flow with the PCT resistor and strengthening the heat exchange effect. The air guide block 111 forms a horn-shaped cavity with the box, which converges and accelerates the air flow, making the warming air flow more efficiently enter the heat supply assembly 2. The one-way air inlet valve two ensures that the heat in the engine compartment can only flow in one direction, preventing backflow of gas in the working box 11 and ensuring the stability of heat transfer. The sealed box 22 and the reinforcing block 23 are made of stainless steel, enhancing the structural strength and corrosion resistance. The heat insulation cotton on the surface reduces heat loss and improves the warming effect. The inner container 24 is made of copper-zinc alloy, which has good heat conductivity and can quickly transfer heat, allowing the battery to be uniformly heated.

[0029] Example Two On the basis of embodiment one, this embodiment further introduces an intelligent control unit (not shown in the figure, but a conventional technology in the field, such as a vehicle ECU or a dedicated controller), so that the energy efficiency and automation level of the system are optimized.

[0030] The control unit receives the start signal from the vehicle, the engine speed signal, and optionally the temperature sensor signal set in the engine compartment and / or the battery pack. Based on these signals, the controller executes the following intelligent control strategy: First stage (intelligent electric heating): When the vehicle is powered on or started, and the control unit detects that the battery temperature is below the preset threshold (such as 0°C) and the engine has not started or the cabin temperature is insufficient, it automatically enters the first working mode. The controller turns on the circuit, making the fan 12 and PTC resistor 15 work, using a small amount of battery power to quickly and actively warm up. At this time, the air inlet hole 18 (with a second one-way valve 19 and filter screen 110) on the side of the working box 11 is opened to suck in the air inside the vehicle for heating. The horn-shaped cavity formed by the air guide block 111 efficiently converges the hot air and directs it to the heating assembly 2.

[0031] Second stage (waste heat recovery): When the control unit detects that the engine has started and is running stably (such as the speed exceeding the idle speed threshold), and the engine compartment temperature rises to a sufficient level for warming up, it issues an instruction to cut off the power supply to the PTC resistor 15 and the fan 12. At this time, the system completely switches to the second working mode. The high-temperature exhaust gas in the engine compartment is sucked into the working box 11 through the external air inlet pipe and the first one-way valve under the action of negative pressure, and continues to provide free heat for the battery along the same preheated airflow channel.

[0032] This intelligent mode switching based on working conditions not only solves the problem of warming up at the initial start, but also realizes the "peak clipping and valley filling" and step utilization of energy, converting the traditionally wasted engine waste heat into valuable resources, and systematically improving the energy efficiency of the whole vehicle.

[0033] Embodiment three This embodiment details a control method for the above-mentioned battery warming device. The method is executed by the control unit of the vehicle (such as the vehicle controller VCU or the battery management system BMS), and its core is to intelligently decide and switch the warming mode based on the vehicle operating state, with clear flow and rapid response. The specific steps are as follows: S1: System initialization and state monitoring. After the vehicle is powered on, the control unit continuously monitors the signals of the battery temperature sensor and the engine state signal (such as the speed signal or running flag bit sent by the engine ECU).

[0034] S2: Triggering and execution of the first working mode (electric heating and warming up). When the control unit detects that the battery temperature is lower than a first preset threshold (e.g. 5°C) and the engine is in an idle state, it is determined that the electric heating condition is met. Then, the control unit sends a command to the battery warming device to turn on the power supply circuit of the fan (12) and the PTC resistor (15). At this time, the device operates in the first working mode, using the battery power to quickly and actively heat, and the hot air passes through the air flow channel to warm up the battery.

[0035] S3: Mode switching condition determination. During the operation of the electric heating mode, the control unit continuously monitors the engine state and optionally monitors the signal of the engine compartment temperature sensor. When it is confirmed that the engine has started and has been running for more than a preset time (e.g. 30 seconds), and / or the engine compartment temperature is higher than a second preset threshold (e.g. 40°C), it is determined that the engine waste heat has stabilized and is sufficient for warming up.

[0036] S4: Switching and execution of the second working mode (waste heat recovery). Once the switching condition in S3 is met, the control unit immediately sends a command to cut off the power supply to the PTC resistor 15 and the fan 12. At this time, the battery warming device seamlessly switches to the second working mode and relies entirely on the free waste heat introduced by the engine compartment to continuously heat or warm up the battery through the original high-efficiency heat-insulated air duct.

[0037] S5: Continuous monitoring and closed-loop control. In the second working mode, the control unit still continuously monitors the battery temperature. When the battery temperature reaches the ideal working range (e.g. 15-25°C), the control unit can adjust the valve in the air inlet pipeline (e.g. adjust the passage at the flange to a small opening) to moderately reduce the heat input, achieve closed-loop control, avoid battery overheating, and optimize energy utilization.

[0038] Example Four: This embodiment provides a hybrid vehicle that integrates the battery warming device as described in Example One or Example Two, and preferably uses the control method described in Example Three.

[0039] In this hybrid vehicle, the heating assembly 1 of the battery warming device is reasonably arranged in the front compartment of the vehicle, and the external air inlet pipe connected through the flange 16 is carefully designed and routed to the vicinity of the engine exhaust manifold or around high-temperature components such as turbochargers to obtain the most efficient waste heat source. The heat supply assembly 2 is integrated with the high-voltage power battery pack (battery) of the hybrid vehicle, and the heat-conducting inner shell 24 tightly fits or surrounds the battery modules to ensure the maximum heat contact area, thereby achieving efficient and uniform thermal management.

[0040] The hybrid vehicle is equipped with the intelligent battery warm-up system, so that the power battery can always be in the optimal working temperature range during cold start in severe cold and daily operation. This significantly improves the pure electric endurance, power output performance and battery charge and discharge efficiency of the vehicle in low temperature environment, reduces the energy consumption of the vehicle through waste heat recovery, realizes the performance and energy efficiency, enhances the adaptability and competitiveness of the product in different climate conditions around the world.

[0041] In summary, the present application has the following technical effects.

[0042] The unity of low-temperature starting performance and life cycle economy is realized: through the two-stage warm-up strategy of "electric first and then hot", the problem of battery performance decline during cold start of the vehicle is fundamentally solved, and the instant response of power is ensured. At the same time, the free engine waste heat is maximized, the additional electric energy consumption caused by warm-up is significantly reduced, the energy utilization efficiency of the vehicle is improved, and the use cost of the user is reduced.

[0043] Intelligent control is introduced, and the self-adaptive ability of the system is improved: through the integration of the control unit and the sensor, the automatic, smooth and seamless switching of the warm-up mode is realized. The system can adapt to different environmental temperatures and vehicle operating conditions, avoiding the limitations of manual intervention or single working mode, so that the warm-up process is always in the optimal state.

[0044] Through ingenious structure design, high-efficiency heat management and system reliability are achieved: Labyrinth design of spoiler: greatly improves the heat exchange efficiency in limited space, so that PTC heating is fast and uniform.

[0045] One-way valve system: the first one-way valve prevents harmful backflow and ensures the safety of the engine compartment; the second one-way valve and filter screen combination ensures clean air intake and maintains one-way air flow, protecting internal components.

[0046] Composite structure of "thermal insulation layer + heat-conducting inner container": effectively reduces heat loss and quickly and uniformly spreads heat to the entire battery surface, avoiding local overheating and improving the consistency of warm-up effect, which helps to prolong the battery life.

[0047] Enhances the environmental adaptability and market competitiveness of the vehicle: makes the hybrid vehicle also perform excellent endurance and power performance in severe cold areas, widens the application region of the product, meets the needs of a wider user group, and is a key technology to improve the comprehensive competitiveness of the product.

[0048] It should be noted that, in this article, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "fixed", "mounted", "connected", "linked" should be understood in a broad sense, for example, "mounted" can be fixed connection, can also be detachable connection, or integral connection; "connected" can be mechanical connection, can also be electrical connection; "connected" can be directly connected, can also be indirectly connected through an intermediate medium, or the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A battery warming-up device for a hybrid vehicle, characterized by: The application relates to a battery warming device for a vehicle. The device comprises a heating assembly (1) and a heat supply assembly (2). The heating assembly (1) comprises a working box (11), a fan (12) and an electric heating element (15) arranged in the working box (11), and an air inlet pipeline for connecting an engine compartment. The heat supply assembly (2) is connected with the heating assembly (1) and is used for accommodating a battery and transferring heat. The device is configured to have: a first working mode: in the initial stage of vehicle starting, the electric heating element (15) is driven by the electric energy of the battery to generate hot air for warming the battery; 2. The battery warming device for a hybrid vehicle according to claim 1, characterized by: a second working mode: after the engine is started, the battery is warmed by the waste heat from the engine compartment.

3. The battery warming device for a hybrid vehicle according to claim 1 or 2, characterized by: The electric heating element (15) is a positive temperature coefficient (PTC) resistor.

4. The battery warming device for a hybrid vehicle according to claim 1, characterized by: The working box (11) is provided with a spoiler (14) comprising a plurality of staggered distribution of partitions and layers to prolong the airflow path and increase the contact area with the electric heating element (15).

5. The battery warming device for a hybrid vehicle according to claim 1, characterized by: A first one-way valve is arranged on the air inlet pipeline to prevent the gas in the working box (11) from flowing back to the engine compartment.

6. The battery warming device for a hybrid vehicle according to claim 1, characterized by: The air inlet of the working box (11) is provided with a second one-way valve (19) and a filter screen (110).

7. The battery warming device for a hybrid vehicle according to claim 6, characterized by The heat supply assembly (2) comprises a battery shell (21), a sealed box (22) and a heat-conducting inner container (24) arranged from outside to inside, and a heat preservation and insulation layer is arranged between the sealed box (22) and the battery shell (21).

8. The battery warming device for a hybrid vehicle according to claim 7, characterized by: The heat-conducting inner container (24) is made of copper-zinc alloy, and a plurality of air outlet holes (25) are arranged on the surface of the heat-conducting inner container (24).

9. A control method for a hybrid vehicle battery warming device, characterized by, The device further comprises a control unit configured to automatically switch the first working mode and the second working mode based on the working state of the engine and / or the temperature of the engine compartment. The device comprises: detecting a vehicle starting signal; in the initial stage of vehicle starting, controlling the battery warming device to enter the first working mode and performing electric heating warming by using the electric energy of the battery; 10. A hybrid vehicle characterized by comprising: after detecting that the engine is started and runs stably, controlling the battery warming device to switch to the second working mode and performing warming by using the waste heat of the engine, and stopping electric heating. The device is assembled with the battery warming device according to any one of claims 1-8.

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