Battery heating device for hybrid vehicle

Abstract

The utility model provides a battery heating device for a hybrid vehicle, which comprises an engine communicated with an exhaust pipe through an air pipe. An air inlet of the heat exchanger is fixedly connected with one end of an air pipe, and the other end of the air pipe is fixedly communicated with an air outlet of the exhaust pipe; the heat storage tank is connected with the heat exchanger through a water pipe assembly; and the power battery is connected with the heat storage tank through a water pipe assembly. The utility model relates to the technical field of battery heating, in particular to a battery heating device for a hybrid vehicle. Aiming at the defects in the prior art, the utility model develops the battery heating device for the hybrid power vehicle, and the battery heating device is favorable for heating a battery by utilizing heat in tail gas of an engine.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heating, in particular to a battery heating device for a hybrid vehicle. Background Art

[0002] With the rapid development of my country's new energy vehicle industry, power batteries have occupied an important position in the whole vehicle and are one of the key components of electric vehicles. Since the battery charging and discharging process is a chemical reaction, it is related to temperature. Under low temperature conditions, the activity of the battery chemical reaction is reduced, resulting in the battery's weak charging and discharging ability at low temperatures. Therefore, the power battery needs to be heated under low temperature conditions. The current mainstream heating methods are electric heating and liquid circulation heating. Electric heating mainly includes electric heating film and PTC heating. Liquid circulation heating generally uses an external PTC to heat the antifreeze, and then heats the battery through the antifreeze.

[0003] The above heating methods all consume the battery's own power. Since the battery power of hybrid vehicles is smaller than that of pure electric vehicles, the use of the above battery heating methods will cause the battery power to drop rapidly, resulting in poor economy of the entire vehicle. Especially when the vehicle is shut down for a long time in cold areas, it is necessary to ensure that the battery power is sufficient before the last shutdown. Otherwise, after restarting, the battery may not be heated to the appropriate temperature due to low battery power, resulting in poor battery charging and discharging performance, which will cause the vehicle to be unable to be used normally.

[0004] Hybrid electric vehicles are equipped with an engine, and the exhaust gas discharged by the engine contains a large amount of heat. The heat in the engine exhaust gas can be used to heat the battery.

[0005] Therefore, in view of the above problems, a battery heating device for a hybrid vehicle is proposed to solve the above problems. Utility Model Content

[0006] The utility model aims at the deficiencies of the prior art and develops a battery heating device for a hybrid vehicle. The utility model is conducive to utilizing the heat in the engine exhaust to heat the battery.

[0007] The technical solution to the technical problem solved by the utility model is as follows: the utility model provides a battery heating device for a hybrid vehicle, comprising an engine, the engine being connected to an exhaust pipe through an air pipe; a heat exchanger, the air inlet of the heat exchanger being fixedly connected to one end of the air pipe, and the other end of the air pipe being fixedly connected to the air outlet of the exhaust pipe; a heat storage tank, the heat storage tank being connected to the heat exchanger through a water pipe assembly; and a power battery, the power battery being connected to the heat storage tank through a water pipe assembly. The heat storage tank, the heat exchanger and the water pipe assembly are provided to facilitate heating of the power battery.

[0008] As an optimization, an electric tee is installed on the air pipe. The inlet and the first outlet of the electric tee are respectively connected to the air pipe, and the second outlet of the electric tee is used to discharge the exhaust gas.

[0009] As an optimization, the water pipe assembly includes a first water supply pipe, a main water supply pipe, a first branch pipe, a second branch pipe, a return branch pipe and a return pipe. By setting the water pipe assembly, water circulation can be easily realized.

[0010] As an optimization, the water outlet of the internal water channel of the heat exchanger is fixedly connected to the first water supply pipe, the water inlet of the internal water channel of the heat storage tank is fixedly connected to the first water supply pipe, the water inlet of the internal water channel of the heat exchanger is fixedly connected to the return pipe, the water outlet of the internal water channel of the heat storage tank is fixedly connected to the main water supply pipe, the main water supply pipe is fixedly connected to the first branch pipe, and the first branch pipe is fixedly connected to the return pipe.

[0011] As an optimization, a water pump is installed on the main water supply pipe. The water pump is provided to provide power for the circulation of water.

[0012] As an optimization, a first electric two-way valve is installed on the first branch pipe. By setting an electric two-way valve, it is convenient to control the first branch pipe.

[0013] As an optimization, the main water supply pipe is fixedly connected to the second branch pipe, the second branch pipe is fixedly connected to the water inlet of the internal water channel of the power battery, the water outlet of the internal water channel of the power battery is fixedly connected to the return branch pipe, and the return branch pipe is fixedly connected to the return pipe. By arranging the second branch pipe and the return branch pipe to be connected to the internal water channel of the power battery, the power motor is heated.

[0014] As an optimization, a second electric two-way valve is installed on the second branch pipe, and a third electric two-way valve is installed on the return water branch pipe. By providing the second electric two-way valve and the third electric two-way valve, it is convenient to realize the heating control of the power motor.

[0015] As an optimization, the heat storage tank is connected to a temperature sensor. By setting the temperature sensor, it is convenient to monitor the temperature in the heat storage tank.

[0016] The effects provided in the utility model content are only the effects of the embodiments, not all the effects of the utility model. The above technical solution has the following advantages or beneficial effects:

[0017] (1) This device uses the heat in the engine exhaust to heat the power battery, does not consume additional energy, and has good economic efficiency;

[0018] (2) The heating process does not require the consumption of the power battery itself, especially when the machine is shut down for a long time in cold areas. There is no requirement for the power battery power, and the adaptability to working conditions is better;

[0019] (3) The power battery can be heated by manual or remote control early start, and no high voltage electricity is required during the heating process, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a schematic diagram of the control strategy of the utility model.

[0023] In the figure: 1. engine, 2. exhaust pipe, 3. air pipe, 4. electric tee, 5. heat exchanger, 6. first water supply pipe, 7. heat storage tank, 8. temperature sensor, 9. water pump, 10. main water supply pipe, 11. first branch pipe, 12. second electric two-way valve, 13. second branch pipe, 14. power battery, 15. first electric two-way valve, 16. return branch pipe, 17. third electric two-way valve, 18. return pipe. DETAILED DESCRIPTION

[0024] In order to clearly illustrate the technical features of this solution, the utility model is described in detail below through specific implementation methods and in combination with the accompanying drawings. The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. The utility model omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the utility model. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] like Figure 1 to Figure 2 As shown, a battery heating device for a hybrid vehicle includes an engine 1, the engine 1 is connected to an exhaust pipe 2 through an air pipe; a heat exchanger 5, the air inlet of the heat exchanger 5 is fixedly connected to one end of the air pipe 3, and the other end of the air pipe 3 is fixedly connected to the air outlet of the exhaust pipe 2; a heat storage tank 7, the heat storage tank 7 is connected to the heat exchanger 5 through a water pipe assembly; and a power battery 14, the power battery 14 is connected to the heat storage tank 7 through a water pipe assembly. The heat storage tank 7, the heat exchanger 5 and the water pipe assembly are provided to facilitate heating of the power battery 14.

[0026] An electric tee 4 is installed on the air pipe 3. The inlet and the first outlet of the electric tee 4 are respectively connected to the air pipe 3, and the second outlet of the electric tee 4 is used to discharge the exhaust gas.

[0027] The water pipe assembly includes a first water supply pipe 6, a main water supply pipe 10, a first branch pipe 11, a second branch pipe 13, a return branch pipe 16 and a return pipe 18. By providing the water pipe assembly, water circulation can be easily realized.

[0028] The water outlet of the internal water channel of the heat exchanger 5 is fixedly connected to the first water supply pipe 6, the water inlet of the internal water channel of the heat storage tank 7 is fixedly connected to the first water supply pipe 6, the water inlet of the internal water channel of the heat exchanger 5 is fixedly connected to the return pipe 18, the water outlet of the internal water channel of the heat storage tank 7 is fixedly connected to the main water supply pipe 10, the main water supply pipe 10 is fixedly connected to the first branch pipe 11, and the first branch pipe 11 is fixedly connected to the return pipe 18.

[0029] A water pump 9 is installed on the main water supply pipe 10. The water pump 9 is provided to provide power for the circulation of water.

[0030] A first electric two-way valve 15 is installed on the first branch pipe 11. The electric two-way valve 15 is provided to facilitate control of the first branch pipe 11.

[0031] The main water supply pipe 10 is fixedly connected to the second branch pipe 13, the second branch pipe 13 is fixedly connected to the water inlet of the internal water channel of the power battery 14, the water outlet of the internal water channel of the power battery 14 is fixedly connected to the return branch pipe 16, and the return branch pipe 16 is fixedly connected to the return pipe 18. By arranging the second branch pipe 13 and the return branch pipe 16 to be connected to the internal water channel of the power battery 14, the power motor 14 is heated.

[0032] The second branch pipe 13 is provided with a second electric two-way valve 12, and the return branch pipe 16 is provided with a third electric two-way valve 17. By providing the second electric two-way valve 12 and the third electric two-way valve 17, heating control of the power motor 14 is conveniently realized.

[0033] The heat storage tank 7 is connected to a temperature sensor 8. By providing the temperature sensor 8, it is convenient to monitor the temperature in the heat storage tank 7.

[0034] The water pump 9, the electric three-way valve 4, the first electric two-way valve 15, the second electric two-way valve 12 and the third electric two-way valve 17 are electrically connected to the vehicle controller and controlled by the vehicle controller. The vehicle controller is wirelessly connected to the remote control key.

[0035] The temperature sensor 8 and the power battery 14 are electrically connected to the vehicle controller respectively. The temperature sensor 88 collects the temperature of the antifreeze in the heat storage tank, and the battery BMS of the power battery 14 collects the battery cell temperature. The controller reads the temperature in the heat storage tank 7 and the battery cell temperature of the power battery 14 as judgment conditions to control the opening and closing of the water pump 9 and related valves.

[0036] The engine 1, the exhaust pipe 2, the heat exchanger 5, the heat storage tank 7, the water pump 9, and the power battery 14 are respectively installed at appropriate positions of the vehicle.

[0037] The air pipe 3, the first water supply pipe 6, the main water supply pipe 10, the first branch pipe 11, the second branch pipe 13, the return branch pipe 16 and the return pipe 18 are respectively installed at appropriate positions of the vehicle through clips.

[0038] The workflow of this embodiment is:

[0039] In the initial state, the vehicle is on low voltage, and it is determined whether the vehicle is on high voltage (the vehicle is started with low voltage first, and then high voltage after self-test is passed. The vehicle can only operate after high voltage). If there is no high voltage, the vehicle controller determines whether there is a manual or remote control heating request (preset buttons on the vehicle and remote control, manual means manually pressing the preset button on the vehicle, and remote control means pressing the preset button on the remote control). If there is no request, the controller turns off the water pump 9 and closes the second electric two-way valve 12 and the third electric two-way valve 17. When there is a manual or remote control heating request or the vehicle is on high voltage, it is determined whether the battery temperature is lower than the set value. If it is higher than the set value, the controller turns off the water pump 9 and closes the second electric two-way valve 12 and the third electric two-way valve 17; if it is lower than the set value, the controller opens the second electric two-way valve 12 and the third electric two-way valve 17 and controls the water pump 9 to work.

[0040] When the vehicle is under high pressure, the controller determines whether the temperature in the heat storage tank 7 is lower than the set value. When the temperature in the heat storage tank 7 is higher than the set value, the first outlet of the electric three-way valve 4 is controlled to be closed, the second outlet is opened, and the first electric two-way valve 15 is controlled to be closed. When the temperature in the heat storage tank 7 is lower than the set value, it is determined whether the engine 1 is started. When the engine 1 is not started, the controller controls the engine 1 to start. When the temperature in the heat storage tank 7 is higher than the set value and the engine 1 is turned on, it is determined whether the battery temperature is lower than the set value. If it is not lower than the set value, the first outlet of the electric three-way valve 4 is controlled to be opened, the second outlet is closed, the first electric two-way valve 15 is controlled to be opened, and the water pump 9 is controlled to work; when it is higher than the set value, the first electric two-way valve 15 is controlled to be closed, the first outlet of the electric three-way valve 4 is controlled to be opened, and the second outlet is closed.

[0041] Although the specific implementation methods of the utility model are described above in conjunction with the accompanying drawings, this does not limit the scope of protection of the utility model. On the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A battery heating device for a hybrid vehicle, characterized in that: It comprises an engine (1), wherein the engine (1) is connected to an exhaust pipe (2) via an air pipe; A heat exchanger (5), wherein an air inlet of the heat exchanger (5) is fixedly connected to one end of an air pipe (3), and the other end of the air pipe (3) is fixedly connected to an air outlet of the exhaust pipe (2); A heat storage tank (7), wherein the heat storage tank (7) is connected to the heat exchanger (5) via a water pipe assembly; A power battery (14), wherein the power battery (14) is connected to the heat storage tank (7) via a water pipe assembly.

2. A battery heating device for a hybrid vehicle according to claim 1, characterized in that: An electric tee (4) is installed on the air pipe (3).

3. A battery heating device for a hybrid vehicle according to claim 1, characterized in that: The water pipe assembly comprises a first water supply pipe (6), a main water supply pipe (10), a first branch pipe (11), a second branch pipe (13), a return water branch pipe (16) and a return water pipe (18).

4. A battery heating device for a hybrid vehicle according to claim 3, characterized in that: The water outlet of the internal water channel of the heat exchanger (5) is fixedly connected to the first water supply pipe (6), the water inlet of the internal water channel of the heat storage tank (7) is fixedly connected to the first water supply pipe (6), the water inlet of the internal water channel of the heat exchanger (5) is fixedly connected to the return water pipe (18), the water outlet of the internal water channel of the heat storage tank (7) is fixedly connected to the main water supply pipe (10), the main water supply pipe (10) is fixedly connected to the first branch pipe (11), and the first branch pipe (11) is fixedly connected to the return water pipe (18).

5. A battery heating device for a hybrid vehicle according to claim 4, characterized in that: A water pump (9) is installed on the main water supply pipe (10).

6. A battery heating device for a hybrid vehicle according to claim 4, characterized in that: A first electric two-way valve (15) is installed on the first branch pipe (11).

7. A battery heating device for a hybrid vehicle according to claim 3, characterized in that: The main water supply pipe (10) is fixedly connected to the second branch pipe (13), the second branch pipe (13) is fixedly connected to the water inlet of the internal water channel of the power battery (14), the water outlet of the internal water channel of the power battery (14) is fixedly connected to the return water branch pipe (16), and the return water branch pipe (16) is fixedly connected to the return water pipe (18).

8. A battery heating device for a hybrid vehicle according to claim 7, characterized in that: A second electric two-way valve (12) is installed on the second branch pipe (13), and a third electric two-way valve (17) is installed on the return water branch pipe (16).

9. A battery heating device for a hybrid vehicle according to claim 1, characterized in that: The heat storage tank (7) is connected to a temperature sensor (8).

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