External rapid intelligent heating system for power battery

Abstract

The utility model discloses an external rapid intelligent heating system for a power battery, which comprises a vehicle end, a preheating device and a liquid electric connecting device, and the vehicle end is connected with the preheating device through the liquid electric connecting device; a whole vehicle controller located at a vehicle end communicates with the battery heat manager BMS and the heat cycle control ECU, so that the first closed loop or the second closed loop preheats the power battery; heating circulation is formed through the external preheating device and the vehicle control unit, energy consumption of the power battery is avoided, meanwhile, the external preheating 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 production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile technical field, specifically is a power battery external quick intelligent heating system. BACKGROUND

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

[0003] After the pure electric vehicle stops running in severe cold winter, the temperature of the power battery cell will drop to the external extremely cold temperature. When the vehicle starts again, the battery thermal management system BMS of the whole vehicle needs to heat the power battery cell to make the temperature of the power battery rise to the optimal working temperature of the battery. However, the power battery energy needs to be consumed when the battery thermal management system BMS works, the power battery discharges slowly, the PTC heater works, the cooling liquid flowing through the power battery is heated, and then the power battery is heated. This process consumes the power of the whole vehicle, and because the power battery cannot release a large working current when the vehicle starts, the heating process is slow. SUMMARY

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a power battery external quick intelligent heating system. The external preheating device and the vehicle controller form a heating cycle, which avoids the consumption of power battery energy during the heating process. At the same time, the external preheating device has a larger heating cycle power, which can quickly raise the temperature of the power battery to a suitable temperature.

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

[0006] A power battery external quick intelligent heating system is composed of a vehicle end, a preheating device and a liquid-electric connection device. The vehicle end and the preheating device are connected through the liquid-electric connection device.

[0007] The vehicle end includes a first closed loop formed by a BMS water pump, a PTC heater and a power battery. The battery thermal manager BMS is communicatively connected with the BMS water pump, the PTC heater and the power battery. The first expansion tank is connected between the BMS water pump and the power battery.

[0008] The preheating device comprises a thermal cycle control ECU, a second expansion water tank, a heat source module and a water pump, the water pump is connected with the power battery and a PTC heater, i.e. a water inlet, the second expansion water tank is connected with the power battery and a BMS water pump, i.e. a water outlet; the heat source module is connected with the front end of the second expansion water tank, and the heat source module is also connected with the water pump to form a second closed loop; the water pump and the heat source module are in communication with the thermal cycle control ECU respectively;

[0009] The vehicle controller at the vehicle end is in communication with the battery thermal manager BMS and the thermal cycle control ECU respectively, so that the first closed loop or the second closed loop preheats the power battery.

[0010] As a further improvement, the vehicle end is provided with a first electromagnetic valve and a second electromagnetic valve, and the vehicle controller is in communication connection with the first electromagnetic valve between the PTC heater and the power battery and the second electromagnetic valve between the BMS water pump and the power battery respectively, so as to open and close the first electromagnetic valve and the second electromagnetic valve.

[0011] As a further improvement, the thermal cycle control ECU reminds the driver that the vehicle power battery is preheated in place through sound or light.

[0012] As a further improvement, the thermal cycle control ECU is in communication connection with a buzzer.

[0013] As a further improvement, the liquid-electric connection device is an integrated quick plug structure which can prevent liquid from flowing out when disconnected; the integrated quick plug structure is provided with a plurality of interfaces connected with the vehicle end and the preheating device respectively, and the interfaces of the vehicle end and the preheating device correspond one by one.

[0014] As a further improvement, the interfaces are provided in three pairs, which are used for information interaction between the control thermal cycle control ECU and the vehicle controller, circulating return water of the second expansion water tank and circulating inlet water of the water pump.

[0015] As a further improvement, the first expansion water tank is connected between the BMS water pump and the power battery through a three-way joint.

[0016] As a further improvement, the water inlet and the water outlet are connected with the water pump and the second expansion water tank respectively through a three-way joint.

[0017] As a further improvement, the heat source module is connected with the front end of the second expansion water tank through a three-way joint.

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

[0019] The utility model discloses a heating circulation is formed with the whole vehicle controller through the external preheating device, avoids the consumption of power battery energy, and the external preheating device has greater heating circulation power simultaneously, can quickly promote power battery temperature to suitable temperature, shortens power battery heating time, improves production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure block diagram of the internal heating system of the utility model;

[0021] Figure 2 It is a structure block diagram of the external quick intelligent heating system of the utility model. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] EMBODIMENT

[0024] Refer to the drawings Figure 1 An internal heating system, comprising: battery thermal manager BMS, PTC heater, first expansion tank, power battery and BMS water pump, wherein the battery thermal manager BMS is connected with the BMS water pump, the PTC heater and the power battery through the electric control line respectively, the BMS water pump, the PTC heater and the power battery are enclosed into the first closed loop through the hydraulic control line, i.e. pipeline, the hydraulic control line between the BMS water pump and the power battery is provided with a three-way joint, so as to connect the first expansion tank through the three-way joint.

[0025] Wherein, the PTC heater is controlled by the battery thermal manager BMS, and the resistance wire heats the heated element by consuming the power battery electric quantity. The battery thermal manager BMS is connected with the BMS water pump, the PTC heater and the like, including high-voltage wire harness, low-voltage wire harness, controller, temperature sensor and pressure sensor and the like, to constitute the battery thermal management system BMS, through collecting the power battery cell temperature, adjusting the flow of battery coolant, so that the battery works at the appropriate temperature.

[0026] The battery thermal manager BMS acquires the battery temperature of the power battery in real time. When the battery temperature is low, the battery thermal manager BMS controls the PTC heater to work, and controls the BMS water pump to work at the same time. The cooling liquid in the pipeline is heated by the PTC heater driven by the BMS water pump, flows through the power battery and returns to the BMS water pump. The power battery energy needs to be consumed in the circulation process, and the heating power of the PTC heater is limited, the heating speed is slow, and the power battery temperature rises slowly.

[0027] In a preferred embodiment, referring to the accompanying drawings Figure 2 A power battery external rapid intelligent heating system is composed of a vehicle end, a preheating device and a liquid-electric connection device. The vehicle end and the preheating device are connected through the liquid-electric connection device.

[0028] The vehicle end comprises the above-mentioned internal heating system, a vehicle controller and a plurality of three-way joints. The vehicle controller is communicatively connected with the battery thermal manager BMS through an electric control line, and is communicatively connected with the thermal cycle control ECU of the preheating device through the electric control line. The power battery is provided with three-way joints between the PTC heater and the BMS water pump. The two three-way joints are respectively connected with the water pump and the second expansion water tank of the preheating device through liquid control lines.

[0029] Preferably, the vehicle controller is further communicatively connected with a first electromagnetic valve between the PTC heater and the power battery and a second electromagnetic valve between the BMS water pump and the power battery through the electric control line, so as to control the opening and closing of the first electromagnetic valve and the second electromagnetic valve. The first electromagnetic valve and the second electromagnetic valve are in a normally on state, and are cut off when powered.

[0030] The preheating device comprises a thermal cycle control ECU, a second expansion water tank, a heat source module and a water pump. The water pump is connected with the three-way joints between the power battery and the PTC heater, and the second expansion water tank is connected with the three-way joints between the power battery and the BMS water pump. The heat source module is connected with the front end of the second expansion water tank, and a three-way joint is arranged at the connection position. The heat source module is also connected with the water pump. A second closed loop is formed by the power battery, the second expansion water tank, the heat source module and the water pump. In addition, the water pump and the heat source module are communicatively connected with the thermal cycle control ECU through electric control lines.

[0031] Preferably, the thermal cycle control ECU is further communicatively connected with a buzzer through an electric control line.

[0032] The liquid-electric connection device is an integrated quick plug structure that is preset together in advance, and can prevent liquid from flowing out when disconnected. The integrated quick plug structure is provided with a plurality of interfaces connected with the vehicle end and the preheating device respectively, and the interfaces of the vehicle end and the preheating device correspond one by one.

[0033] Specifically, the vehicle end reserves three interfaces of the first interface A1, the second interface A2 and the third interface A3, and the preheating device reserves three interfaces of the fourth interface B1, the fifth interface B2 and the sixth interface B3, wherein the first interface A1 is plugged with the fourth interface B1, the second interface A2 is plugged with the fifth interface B2, and the third interface A3 is plugged with the sixth interface B3, and the three pairs of interfaces are respectively used for controlling information interaction between the heat cycle control ECU and the vehicle controller, circulating backwater of the second expansion water tank and circulating inlet water of the water pump.

[0034] The vehicle controller at the vehicle end communicates with the battery thermal manager BMS and the heat cycle control ECU respectively, so that the first closed loop or the second closed loop preheats the power battery.

[0035] When the external environment temperature is low and the vehicle is parked for a long time, the preheating device can be used to preheat the power battery of the vehicle at this time, and the actual use method is as follows: the preheating device and the vehicle end are connected through the liquid-electric connection device; after the liquid-electric connection device is connected, the vehicle is powered on for self-checking, the battery thermal manager BMS sends the power battery cell temperature to the vehicle controller, and the heat cycle control ECU sends a signal to the vehicle controller to report that the liquid-electric connection device is connected in place, the vehicle controller controls the first electromagnetic valve and the second electromagnetic valve to be powered off, the heat cycle control ECU controls the heat source module to start working, and controls the water pump to work, the antifreeze in the preheating device heated by the heat source module circulates through the water pump, the three-way joint, the power battery, the three-way joint and the heat source module, and then preheats the cells in the power battery.

[0036] During the preheating process, the heat cycle control BMS synchronously sends the cell temperature of the power battery to the vehicle controller, when the highest temperature or the average temperature of the power battery cell reaches a preset value, the vehicle controller requests the heat cycle control ECU, and the preheating device stops working; at the same time, the buzzer sends a prompt sound to remind the driver that the vehicle power battery is preheated in place, and the liquid-electric connection device can be disconnected for safe driving.

[0037] After the liquid-electric connection device is disconnected, the vehicle controller powers off the first electromagnetic valve and the second electromagnetic valve, at this time, the vehicle end restores its own thermal management cycle control and communicates with the BMS water pump.

[0038] The vehicle end self thermal management cycle control system is controlled by the heat cycle control BMS, which is a general technology and will not be repeated here.

[0039] In this embodiment, the buzzer can be replaced by a light flashing prompt mode, and similar prompt modes also belong to the protection scope of the utility model. The first electromagnetic valve and the second electromagnetic valve at the vehicle end are non-mandatory structures and can be cancelled in non-precise control.

[0040] The utility model discloses a kind of external quick intelligent heating systems of power battery:

[0041] (1), preheating device is the external device of vehicle end, can be used as vehicle accessory with vehicle, can also be used as a kind of site facilities, cooperate with pure electric vehicle warm-up use.

[0042] (2), liquid electricity connecting device is integrated type fast plug structure that is preset together in advance, can prevent liquid outflow when disconnecting.

[0043] (3), two always-on electromagnetic valves in vehicle end original heat management loop, power cut-off when external preheating device works, but the electromagnetic valve is non-mandatory structure, antifreeze without this structure still circulates according to heat circulation loop, the first electromagnetic valve and second electromagnetic valve are arranged, and energy consumption can be reduced.

[0044] (4), there is information interaction between whole vehicle controller and the heat circulation control ECU of preheating device, and power battery cell temperature can be accurately controlled.

[0045] (5), preheating device can be equipped with enough heat source module and water pump according to need, and power battery cell temperature is preheated to place quickly.

[0046] (6), after battery cell temperature reaches predetermined temperature, preheating device sends continuous photoelectric signal to prompt driver, power battery preheating is in place, and driver can be prompted to drive.

[0047] Although the utility model is 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 principles disclosed in the present application.

Claims

1. A power battery external rapid intelligent heating system, characterized in that, The vehicle end, the preheating device and the liquid-electric connection device are connected through the liquid-electric connection device; The vehicle end comprises a first closed loop formed by a BMS water pump, a PTC heater and a power battery, a battery thermal manager BMS is in communication connection with the BMS water pump, the PTC heater and the power battery, and a first expansion water tank is connected between the BMS water pump and the power battery; The preheating device comprises a heat cycle control ECU, a second expansion water tank, a heat source module and a water pump, the water pump is connected with the power battery and the PTC heater through an inlet, the second expansion water tank is connected with the power battery and the BMS water pump through an outlet, the heat source module is connected with the front end of the second expansion water tank, and the heat source module is also connected with the water pump to form a second closed loop with the power battery, the heat source module and the water pump; the water pump and the heat source module are in communication with the heat cycle control ECU; A vehicle controller located in the vehicle end is in communication with the battery thermal manager BMS and the heat cycle control ECU to preheat the power battery through the first closed loop or the second closed loop.

2. The power battery external rapid intelligent heating system according to claim 1, characterized in that, The vehicle end is provided with a first electromagnetic valve and a second electromagnetic valve, and the vehicle controller is in communication connection with the first electromagnetic valve located between the PTC heater and the power battery and the second electromagnetic valve located between the BMS water pump and the power battery to open and close the first electromagnetic valve and the second electromagnetic valve.

3. The power battery external rapid intelligent heating system of claim 1, wherein, The heat cycle control ECU reminds the driver of the preheating of the vehicle power battery through sound or light.

4. The power battery external rapid intelligent heating system according to claim 3, characterized in that, The heat cycle control ECU is in communication connection with a buzzer.

5. The power battery external rapid intelligent heating system of claim 1, wherein, The liquid-electric connection device is an integrated quick plug structure which can prevent liquid from flowing out when disconnected, and the integrated quick plug structure is provided with a plurality of interfaces connected with the vehicle end and the preheating device, and the interfaces of the vehicle end and the preheating device are one-to-one corresponding.

6. The power battery external rapid intelligent heating system of claim 5, wherein, The interfaces are provided in three pairs for information interaction between the heat cycle control ECU and the vehicle controller, circulation of the second expansion water tank and circulation of the water pump.

7. The power battery external rapid intelligent heating system according to any one of claims 1-6, characterized in that, The first expansion water tank is connected between the BMS water pump and the power battery through a three-way joint.

8. The quick external intelligent heating system for power battery according to any one of claims 1-6, characterized in that, The inlet and the outlet are connected with the water pump and the second expansion water tank through three-way joints respectively.

9. The power battery external rapid intelligent heating system of claim 8, wherein, The heat source module is connected with the front end of the second expansion water tank through a three-way joint.

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