Rapid preheating electric heating device of vehicle-mounted power battery

Abstract

The utility model discloses a rapid preheating electric heating device of a vehicle-mounted power battery, which is used for providing heated antifreeze fluid for the power battery, and an external heating circulation loop for heating the power battery is formed by a water pump, an electric heating chamber, a water outlet of a preheating main body, the power battery and a water inlet of the preheating main body. The water pump and the electric heating wire in the electric heating chamber are made to work through the thermal cycle controller ECU, the anti-freezing solution flowing through the electric heating chamber is heated, and therefore the power battery can be heated through the heated anti-freezing solution. Heating circulation is formed through the external heating device, namely the rapid preheating electric heating device and the battery heat management system, energy consumption of the power battery is avoided, meanwhile, the external heating device has higher heating circulation power, the temperature of the power battery can be rapidly increased to a proper temperature, the heating time of the power battery is shortened, and the service life of the power battery is prolonged. The production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile technical field, specifically, it is a kind of quick preheating electric heating device of vehicle-mounted power battery. BACKGROUND

[0002] As the core component of new energy vehicles, it is crucial to ensure the optimal working temperature of power batteries for their performance, life and safety. However, due to the low-temperature effect of power batteries, their available energy and power decay significantly in low-temperature environments. The reason is that the charge transfer rate of power batteries decreases in low-temperature environments, and the chemical reactions inside the battery also slow down, resulting in a decrease in battery energy and power output. Especially, long-term use in low-temperature environments can accelerate the aging of power batteries, affect the safety of battery charging and discharging, reduce their overall performance, shorten their service life, and further affect the reliability and usability of new energy vehicles.

[0003] After a pure electric vehicle stops running in severe winter, the temperature of the power battery cells will drop to the external extremely cold temperature. When the vehicle starts again, the battery thermal management system BMS needs to heat the power battery cells to raise the temperature of the power battery to the optimal working temperature of the battery. However, the battery thermal management system BMS consumes the energy of the power battery when it works, and the power battery slowly discharges, which makes the PTC heater work to heat the antifreeze flowing through the power battery, and then heats the power battery. This process consumes the power of the entire vehicle, and because the power battery cannot release a large amount of working current when the vehicle starts, the heating process is slow. SUMMARY

[0004] To solve the above technical problems, the purpose of the utility model is to provide a kind of quick preheating electric heating device of vehicle-mounted power battery, through the quick preheating electric heating device of power battery external connection, with power battery forms heating cycle, avoid the consumption of power battery energy in heating process, while the quick preheating electric heating device of external connection has greater heating cycle power, can quickly raise the temperature of power battery to appropriate temperature.

[0005] The utility model solves the above problems by the following technical solutions:

[0006] A kind of quick preheating electric heating device of vehicle-mounted power battery, for providing heated antifreeze for power battery, comprising:

[0007] The preheating main body is internally provided with a water tank, a water pump, a thermal cycle controller ECU, a water temperature sensor, and an electric heating chamber, the water pump outlet, the water tank outlet, and the electric heating chamber inlet are connected through a first three-way joint, the electric heating chamber outlet is connected with the water outlet of the preheating main body, and the water pump inlet is connected with the water inlet of the preheating main body, so as to be connected with the anti-freezing liquid inlet and outlet of the power battery through the water outlet and the water inlet of the preheating main body respectively;

[0008] The thermal cycle controller ECU is connected with the water temperature sensor, the water pump, and both ends of the electric heating wire in the electric heating chamber respectively, the water temperature sensor is arranged at the water pump outlet position and is used for detecting the temperature of the anti-freezing liquid in the pipeline; an external heating cycle loop for heating the power battery is formed by the water pump, the electric heating chamber, the water outlet of the preheating main body, the power battery, and the water inlet of the preheating main body, the water pump and the electric heating wire in the electric heating chamber are made to work through the thermal cycle controller ECU, and the anti-freezing liquid flowing through the electric heating chamber is heated, so as to heat the power battery through the preheated anti-freezing liquid.

[0009] As a further improvement, an anti-freezing liquid filling port extending out of the preheating main body is arranged above the water tank, and the anti-freezing liquid filling port is used for conveniently filling the anti-freezing liquid into the water tank.

[0010] As a further improvement, the thermal cycle controller ECU is connected with an audible and visual alarm unit, and an alarm signal is sent through the audible and visual alarm unit.

[0011] As a further improvement, the thermal cycle controller ECU is further connected with an information interaction interface arranged outside the preheating main body, and is used for information interaction with an external device.

[0012] As a further improvement, a wheel is arranged at the bottom of the preheating main body, and the wheel is used for facilitating movement.

[0013] As a further improvement, the electric heating chamber outlet is connected with the water outlet of the preheating main body through a second three-way joint, the water pump inlet is connected with the water inlet of the preheating main body through a third three-way joint, and a normally closed electromagnetic valve is arranged on a hydraulic control line between the electric heating chamber outlet and the water pump inlet, so that a bypass loop is formed between the water inlet and the water outlet of the preheating main body through the second three-way joint and the third three-way joint, and the anti-freezing liquid flowing into the power battery is preheated.

[0014] As a further improvement, the electromagnetic valve is connected with the thermal cycle controller ECU through an electric control line.

[0015] As a further improvement, the thermal cycle controller ECU is connected with an external power supply line; and the external power supply line is connected with a commercial power supply.

[0016] As a further improvement, the information interaction interface, the water inlet and the water outlet of the preheating main body are integrated.

[0017] As a further improvement, the power battery is further connected with a BMS water pump and a PTC heater in communication, and the BMS water pump, the PTC heater and the power battery sequentially enclose to form a first closed loop, and the BMS water pump, the PTC heater and the power battery are all connected with a battery thermal manager BMS, so that the PTC heater and the BMS water pump are operated through the battery thermal manager BMS to heat the power battery.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0019] (1) The utility model discloses a heating cycle is formed with the battery thermal management system by external heating device, and the consumption of power battery energy is avoided, and the external heating device has greater heating cycle power, can quickly raise power battery temperature to suitable temperature, shorten power battery heating time and improve production efficiency.

[0020] (2) The utility model discloses a heating efficiency when heating power battery through the quick preheating electric heating device is guaranteed through external heating cycle and internal heating cycle cooperation of quick preheating electric heating device, and still sends the continuous alarm signal through the audible and light alarm unit, improves intelligent and safety. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structural diagram of the battery thermal management system of the utility model;

[0022] Figure 2 It is the structural diagram of the battery thermal management system of the utility model;

[0023] REFERENCE SIGNS:

[0024] 1, water tank;2, water pump;3, heat cycle controller ECU;4, electric heating chamber;5, electric heating wire;6, water temperature sensor;7, audible and light alarm unit;8, external power cord;9, information interaction interface;10, water inlet of preheating main body;11, water outlet of preheating main body;12, electromagnetic valve;13, wheel;14, antifreeze filling port. DETAILED DESCRIPTION

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] See attached document Figure 1 A battery thermal management system mainly consists of a battery thermal manager (BMS), a BMS water pump, a PTC heater, a first expansion tank, a power battery, high-voltage wiring harness, low-voltage wiring harness, a controller, a water temperature sensor, and a pressure sensor. The BMS is connected to the BMS water pump, PTC heater, and power battery via electrical control lines. These components are sequentially connected to form a first closed loop via hydraulic control lines (pipelines). A T-connector is provided on the hydraulic control line between the BMS water pump and the power battery to connect to the first expansion tank. By collecting the temperature of the power battery cells, the flow rate of antifreeze flowing through the power battery is adjusted to ensure the power battery operates at a suitable temperature. The PTC heater, controlled by the BMS, consumes power from the power battery; its heating element heats the heating components.

[0028] The Battery Thermal Management System (BMS) monitors the battery temperature in real time. When the battery temperature is low, the BMS controls the PTC heater to operate and simultaneously controls the BMS water pump. The antifreeze in the pipeline is driven by the BMS water pump, heated by the PTC heater, flows through the power battery, and then returns to the BMS water pump. This cycle consumes power battery energy. The PTC heater has limited heating power and a slow heating speed, resulting in a slow temperature rise in the power battery.

[0029] Therefore, refer to the appendix Figure 2 This utility model provides a rapid preheating electric heating device for vehicle power batteries, which is connected to the antifreeze inlet and outlet of the power battery thermal management system. It provides heated antifreeze to the power battery of the battery thermal management system, eliminating the need for a PTC heater to consume power from the power battery to heat the antifreeze supplied by the BMS water pump. Of course, the battery thermal management system is not limited to the above arrangement.

[0030] Furthermore, it can be connected to the inlet and outlet of the power battery antifreeze through several T-connectors to cooperate with the battery thermal management system to achieve heating in conjunction with the battery thermal management system. Preferably, the battery thermal management system (BMS) can also be directly or through the vehicle controller to connect with the thermal circulation controller (ECU) to achieve coordination and select the appropriate heating method.

[0031] The quick preheating electric heating device comprises:

[0032] A preheating body is provided with a water tank 1, a water pump 2, a heat cycle controller ECU 3, a water temperature sensor 6, and an electric heating chamber 4 in the preheating body, the water pump outlet, the water tank outlet, and the electric heating chamber inlet are connected through a first three-way joint, the electric heating chamber outlet is connected with a water outlet 11 of the preheating body, and the water pump inlet is connected with a water inlet 10 of the preheating body, so as to be connected with the power battery anti-freezing liquid inlet and outlet through the water outlet and the water inlet of the preheating body respectively.

[0033] The heat cycle controller ECU is connected with the water temperature sensor, the water pump, and both ends of the electric heating wire 5 in the electric heating chamber respectively, the water temperature sensor is arranged at the water pump outlet position and is used for detecting the temperature of the anti-freezing liquid in the pipeline; an external heating cycle loop for heating the power battery is formed by the water pump, the electric heating chamber, the water outlet of the preheating body, the power battery, and the water inlet of the preheating body, the water pump and the electric heating wire in the electric heating chamber are made to work through the heat cycle controller ECU, and the anti-freezing liquid flowing through the electric heating chamber is heated, so as to heat the power battery through the heated anti-freezing liquid.

[0034] In a specific embodiment, the preheating body is provided with a water tank 1, a water pump 2, a heat cycle controller ECU 3, a water temperature sensor 6, an audible and light alarm unit 7, an electric heating chamber 4, and a solenoid valve 12, wherein an anti-freezing liquid filling port 14 extending out of the preheating body is arranged above the water tank, the anti-freezing liquid filling port 14 is convenient for filling the anti-freezing liquid into the water tank, and the water tank 1 provides circulating liquid for the device.

[0035] The liquid control line between the water pump outlet, the water tank outlet, and the electric heating chamber inlet is connected through the first three-way joint, the electric heating chamber outlet is connected with the water outlet 11 extending out of the preheating body through the second three-way joint, and the water pump inlet is connected with the water inlet 10 extending out of the preheating body through the third three-way joint; preferably, the second three-way joint and the third three-way joint are connected through the liquid control line, and the liquid control line connecting the second three-way joint and the third three-way joint is provided with the solenoid valve 12, so that the water inlet and the water outlet form a bypass loop through the second three-way joint and the third three-way joint, the solenoid valve is a normally closed solenoid valve, when the solenoid valve is powered on and conducted, the bypass loop is conducted, the temperature of the anti-freezing liquid in the pipeline can be detected through the water temperature sensor, and the anti-freezing liquid flowing into the power battery can be preheated to a suitable temperature in advance.

[0036] The heat cycle controller ECU 3 is connected with the water temperature sensor 6, the audible and light alarm unit 7, the water pump 2, and the solenoid valve 12 through the electric control line respectively, and is connected with an external power supply line 8; the external power supply line 8 is an interface connected with the mains, and provides energy source for the quick preheating electric heating device.

[0037] As preferred, the thermal cycle controller ECU is further connected with an information interaction interface 9 arranged outside the preheating body through an electric control line. The information interaction interface 9 is a connection interface for information interaction with external devices, usually in the form of CAN line connection.

[0038] In further technical solutions, an electric heating wire is arranged inside the electric heating chamber, the electric heating chamber is filled with the anti-freezing liquid flowing through the water pump or the water tank, the electric heating wire is in contact with the anti-freezing liquid, and when the thermal cycle controller ECU applies power to the electric heating wire, the electric heating wire heats the anti-freezing liquid, so that the heated anti-freezing liquid flows out through the outlet of the electric heating chamber.

[0039] In an optional embodiment, the preheating body of the rapid preheating electric heating device is provided with wheels 13, so as to facilitate rapid movement of the rapid preheating electric heating device. In order to facilitate connection with external devices, the information interaction interface, the water inlet and the water outlet of the preheating body are usually integrated as a fast plug-in connection with external devices.

[0040] (1) When preheating alone:

[0041] The thermal cycle controller ECU controls the water pump to work, and the anti-freezing liquid flows along the water pump outlet, the first three-way joint, the electric heating chamber, the second three-way joint, the electromagnetic valve (at this time the thermal cycle controller ECU controls the electromagnetic valve to be powered on), the third three-way joint, and the water pump inlet, to form an internal heating cycle.

[0042] When the anti-freezing liquid circulates in the pipeline, the water temperature sensor connected in the pipeline transmits the temperature of the anti-freezing liquid in the pipeline to the thermal cycle controller ECU in real time. When the temperature of the anti-freezing liquid in the pipeline reaches a predetermined value, the thermal cycle controller ECU stops heating the electric heating wire, the water pump stops working, and the audible and visual alarm unit issues a continuous alarm signal.

[0043] (2) When connected with an external power battery:

[0044] The information interaction interface, the water inlet, and the water outlet are respectively connected with corresponding interfaces of external devices.

[0045] For example, the water inlet is connected with the water outlet of the power battery, and the water outlet is connected with the water inlet of the BMS water pump or the water inlet of the power battery.

[0046] The thermal cycle controller ECU synchronously controls the water pump to work, and the anti-freezing liquid flows along the water pump outlet, the first three-way joint, the electric heating chamber, the second three-way joint, the water outlet of the preheating body, the external device, the water inlet of the preheating body, the third three-way joint, and the water pump inlet, to form an external heating cycle.

[0047] When the external power battery has no information interaction with the device, the heat cycle controller ECU monitors the antifreeze temperature in real time when the external heating cycle is carried out, so that the antifreeze temperature is stabilized at the preset position, and the equipment working time T is set, when the working time T reaches the preset time, the external heating cycle is stopped, and the sound and light alarm unit sends a continuous alarm signal.

[0048] The utility model discloses a quick preheating electric heating device and battery thermal management system form heating cycle, avoid the consumption of power battery energy, and quick preheating electric heating device has greater heating cycle power, can quickly promote power battery temperature to suitable temperature, shorten power battery heating time, improve production efficiency.

[0049] Although the utility model has been described with reference to the explanatory embodiment of the utility model herein, the above-mentioned embodiment is only the preferred implementation of the utility model, and the implementation of the utility model is not limited by the above-mentioned embodiment, and it should be understood that the person skilled in the art can design many other modifications and implementation, and these modifications and implementation will fall within the scope and spirit of the disclosure of the application.

Claims

1. A quick preheating electric heating device for a vehicle-mounted power battery, used for providing heated antifreeze solution for the power battery, characterized in that, The application relates to a preheating device for a power battery. The water tank is provided with an antifreeze filling port extending out of the preheating body, and the antifreeze filling port facilitates antifreeze filling of the water tank. The heat cycle controller ECU is connected with an audible and light alarm unit to send an alarm signal through the audible and light alarm unit.

2. The quick preheating electric heating device for the vehicle-mounted power battery according to claim 1, characterized in that, The heat cycle controller ECU is also connected with an information interaction interface arranged outside the preheating body to interact with external equipment.

3. The quick preheating electric heating device for vehicle-mounted power battery according to claim 1, characterized in that, The information interaction interface, the water inlet and the water outlet of the preheating body are integrated.

4. The quick preheating electric heating device for vehicle-mounted power battery according to claim 1, characterized in that, The preheating body is provided with wheels at the bottom to facilitate movement.

5. The quick preheating electric heating device for vehicle-mounted power battery according to claim 4, characterized in that, The electromagnetic valve is connected with the heat cycle controller ECU through an electric control line.

6. The quick preheating electric heating device for vehicle-mounted power battery according to claim 1, characterized in that, The heat cycle controller ECU is connected with an external power line; the external power line is connected with commercial power.

7. The quick preheating electric heating device for vehicle-mounted power battery according to any one of claims 1-6, characterized in that, The power battery is also connected with a BMS water pump and a PTC heater which are connected in communication, and the BMS water pump, the PTC heater and the power battery sequentially enclose a first closed loop; the BMS water pump, the PTC heater and the power battery are all connected with a battery thermal manager BMS to make the PTC heater and the BMS water pump work through the battery thermal manager BMS to heat the power battery.

8. The quick preheating electric heating device for vehicle-mounted power battery according to claim 7, characterized in that, ​ 9. The quick preheating electric heating device for vehicle-mounted power battery according to claim 7, characterized in that, ​ 10. The quick preheating electric heating device for vehicle-mounted power battery according to claim 7, characterized in that, ​

Images