CN206040905U - A battery thermal management system for electric vehicles - Google Patents

Abstract

The utility model discloses a battery for electric vehicle thermal management system, including battery base, can dismantle the battery case that is connected with battery base, be used for providing the battery device of electric energy and being used for carrying out the battery thermal management device that the heat pipe was managed to the battery device for electric automobile, the battery device is including setting up liquid reserve tank and group battery and the pump of setting on battery base in battery base one side, and the group battery includes a plurality of batteries, and one side of every battery all is provided with the thermal baffles who installs on battery base, and the equal fixedly connected with of opposite side of every battery is used for radiating heat conducting ring flow tube, all is provided with the thermocouple on battery and the heat conducting ring flow tube, is equipped with heating fluid or coolant liquid in the liquid reserve tank. The utility model has the advantages of simple structure and reasonable design, can control electric automobile's battery operating temperature at reasonable within range, safe and reliable, the consumption is lower, has improved temperature control accuracy, uses convenient operation, and the practicality is strong, excellent in use effect, convenient to popularize and use.

Description

A battery thermal management system for electric vehicles

technical field

The utility model belongs to the technical field of electric vehicles, in particular to a battery thermal management system for electric vehicles.

Background technique

In recent years, due to the increasingly serious environmental problems caused by traditional fuel vehicles, countries all over the world are actively looking for a way out and vigorously developing electric vehicles. However, the promotion and popularization of electric vehicles is largely limited by power battery technology and its management system. Power battery technology and its management system are one of the three core technologies of electric vehicle technology, which determines the mileage and service life of electric vehicles. Therefore, many researchers have devoted a lot of energy to study this technology, especially the thermal management technology of power batteries, which has very important research value.

Studies have shown that the best operating temperature range of power lithium batteries is within the range of 25°C to 45°C, and the battery life and work efficiency are the highest. However, the temperature of the power battery often does not reach the optimum temperature during actual work. When the working temperature is lower than 0°C, the internal resistance of the battery will rise sharply, greatly reducing the performance of the battery; when the temperature is too high, the speed of side reactions inside the battery will be accelerated, the irreversible reactants will increase, and the usable capacity of the battery will be greatly increased. Attenuation, the output power is reduced; when the temperature rises further, safety accidents such as battery spontaneous combustion and explosion may even occur. Therefore, there is a need for a battery thermal management system for electric vehicles with simple structure and reasonable design, which can control the battery operating temperature of electric vehicles within a reasonable range, is safe and reliable, has low power consumption, and improves temperature control accuracy.

Utility model content

The technical problem to be solved by the utility model is to provide a battery thermal management system for electric vehicles, which has a simple structure and reasonable design, and can control the battery operating temperature of electric vehicles within a reasonable range. , safe and reliable, low power consumption, improved temperature control accuracy, easy to use and operate, strong practicability, good use effect, and easy to promote and use.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a battery thermal management system for electric vehicles, which is characterized in that it includes a battery base, a battery case detachably connected to the battery base, and is used to provide electric energy for electric vehicles. A battery device and a battery thermal management device for thermal management of the battery device, the battery device includes a liquid storage tank arranged on one side of the battery base and a battery pack and a pump arranged on the battery base, the battery pack includes A plurality of batteries, one side of each battery is provided with a heat insulation baffle installed on the battery base, and the other side of each battery is fixedly connected with a heat conduction circulation tube for heat dissipation, the battery and Thermocouples are installed on the heat conduction circulation pipes, the inlet of the pump is connected to the liquid storage tank through the first guide pipe, the outlet of the pump is connected to the main liquid pipe, and the main liquid pipe is connected to multiple liquid branches Each of the liquid branch pipes is respectively connected to the inlet of each of the heat-conducting circulation pipes, and the outlet of each of the heat-conducting circulation pipes is connected to the liquid storage tank through the second guide pipe. A solenoid valve is installed at the interface between the liquid branch pipe and each of the heat-conducting circulation pipes, and the liquid storage tank is filled with heating liquid or cooling liquid.

The above-mentioned battery thermal management system for electric vehicles is characterized in that: the battery thermal management device includes a microcontroller and a battery management chip connected to the microcontroller and used to detect battery voltage, current and remaining capacity, so The input terminal of the microcontroller is connected with a keyboard module and a signal processing circuit for processing the temperature information collected by the thermocouple, and the output terminal of the microcontroller is connected with a display module, a heating unit for heating the heating liquid and Driver modules for driving pumps and solenoid valves.

The above battery thermal management system for electric vehicles is characterized in that: a plug-in board is provided at the bottom of the battery casing, and a first slot for inserting the plug-in board is provided on the battery base for inserting A second slot for the battery and a third slot for inserting the heat shield.

The above battery thermal management system for electric vehicles is characterized in that: the liquid trunk pipe, the liquid branch pipe and the second diversion pipe are all arranged at the bottom of the battery base, and the two sides of the battery base in the length direction A first through hole through which the liquid branch pipe passes and a second through hole through which the second draft pipe passes are provided respectively.

The above battery thermal management system for electric vehicles is characterized in that: the battery is bonded to the heat-conducting circulation tube with heat-conducting silica gel.

The above battery thermal management system for electric vehicles is characterized in that a plurality of said batteries are connected in series.

The above-mentioned battery thermal management system for electric vehicles is characterized in that: the heat-conducting circulation tube is a multi-stage U-shaped tube.

The above-mentioned battery thermal management system for an electric vehicle is characterized in that the heating unit includes an auxiliary power supply and a heating resistance wire connected to the auxiliary power supply.

The above battery thermal management system for electric vehicles is characterized in that: the battery management chip is a lithium battery management chip OZ890.

Compared with the prior art, the utility model has the following advantages:

1. The utility model has the advantages of simple structure, reasonable design, convenient realization, use and operation.

2. In this utility model, the cooling and heating of the battery are achieved by bonding the heat-conducting circulating pipe on one side of the battery, and the cooling liquid or heating liquid in the liquid storage tank is pumped into the heat-conducting circulating pipe through the pump. The cooling and heating efficiency is high and the reaction speed is high. Fast, safe and reliable, high sealing.

3. The utility model is equipped with a solenoid valve on the heat conduction circulation pipe, and a thermocouple is arranged on the battery and the heat conduction circulation pipe, and the temperature information detected by the thermocouple is used to control the opening of the solenoid valve, thereby realizing the flow control of the cooling liquid or heating liquid , improve the temperature control accuracy.

4. In this utility model, a heat insulation baffle is added between two adjacent batteries. One side of each battery is provided with a heat conduction circulation tube, and each battery is monitored and adjusted as a single temperature unit to further increase the temperature. Control precision, easy to use and operate.

To sum up, the utility model has simple structure and reasonable design, can control the battery operating temperature of electric vehicles within a reasonable range, is safe and reliable, has low power consumption, improves temperature control accuracy, is convenient to use and operates, and has strong practicability , the use effect is good, and it is convenient to popularize and use.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the battery base, the battery casing, the pump and the liquid storage tank of the present invention.

Fig. 3 is a structural schematic diagram of the heat-conducting circulating pipe and the solenoid valve of the present invention.

Fig. 4 is a schematic block diagram of the circuit of the battery thermal management device of the present invention.

Explanation of reference signs:

1—microcontroller; 2—signal processing circuit; 3—keyboard module;

4—heating unit; 5—battery management chip; 6—drive module;

7—display module; 8—battery; 9—battery base;

10—fluid storage tank; 11—pump; 12—heat insulation baffle;

13—heat conduction circulation tube; 14—thermocouple; 15—solenoid valve;

16—battery shell; 17—plug board.

detailed description

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model comprises a battery base 9, a battery casing 16 detachably connected with the battery base 9, a battery device for providing electric energy to an electric vehicle, and a battery device for heating the battery device. Managed battery heat management device, the battery device includes a liquid storage tank 10 arranged on one side of the battery base 9 and a battery pack and a pump 11 arranged on the battery base 9, the battery pack includes a plurality of batteries 8, each One side of the battery 8 is provided with a heat insulation baffle 12 installed on the battery base 9, and the other side of each battery 8 is fixedly connected with a heat conduction circulation pipe 13 for heat dissipation, and the battery 8 and Thermocouples 14 are arranged on the heat conduction circulation pipes 13, the inlet of the pump 11 is connected to the liquid storage tank 10 through the first guide pipe, the outlet of the pump 11 is connected to the liquid trunk pipe, and the liquid trunk pipe is connected to A plurality of liquid branch pipes, each of the liquid branch pipes is respectively connected to the inlet of each of the heat conduction circulation pipes 13, and the outlet of each of the heat conduction circulation pipes 13 is connected to the liquid storage through the second flow guide pipe The tanks 10 are connected, and a solenoid valve 15 is installed at the interface between each of the liquid branch pipes and each of the heat conduction circulation pipes 13 , and the liquid storage tank 10 is filled with heating liquid or cooling liquid.

As shown in Figure 4, in this embodiment, the battery thermal management device includes a microcontroller 1 and a battery management chip 5 connected to the microcontroller 1 and used to detect the voltage, current and remaining capacity of the battery 8, the The input terminal of the microcontroller 1 is connected with a keyboard module 3 and a signal processing circuit 2 for processing the temperature information collected by the thermocouple 14, and the output terminal of the microcontroller 1 is connected with a display module 7 for controlling the temperature of the heating liquid. A heated heating unit 4 and a drive module 6 for driving a pump 11 and a solenoid valve 15 .

As shown in Figure 2, in this embodiment, the bottom of the battery casing 16 is provided with a plug board 17, and the battery base 9 is provided with a first slot for inserting the plug board 17, for inserting the The second slot for the battery 8 and the third slot for inserting the heat shield 12.

As shown in Figure 2, in this embodiment, the liquid trunk pipe, the liquid branch pipe and the second guide pipe are all arranged at the bottom of the battery base 9, and the two sides of the battery base 9 in the length direction are respectively provided with A first through hole through which the liquid branch pipe passes and a second through hole through which the second draft pipe passes.

In this embodiment, the battery 8 and the heat-conducting circulation pipe 13 are bonded with heat-conducting silica gel.

As shown in FIG. 1 , in this embodiment, multiple batteries 8 are connected in series.

As shown in FIG. 3 , in this embodiment, the heat conduction circulating pipe 13 is a multi-stage U-shaped pipe.

In this embodiment, the heating unit 4 includes an auxiliary power supply and a heating resistance wire connected to the auxiliary power supply.

In this embodiment, the battery management chip 5 is a lithium battery management chip OZ890.

During specific implementation, the temperature upper limit value, temperature lower limit value, and reasonable temperature range of the battery 8 are set through the keyboard module 3, and the thermocouple 14 converts the temperature information on the battery 8 and the heat conduction circulation tube 13 into a voltage signal and feeds it back to the signal The processing circuit 2, the signal processing circuit 2 amplifies and converts the electrical signal to the microcontroller 1, and the battery management chip 5 detects the voltage, current and remaining capacity information of the battery 8 and sends them to the microcontroller 1, the microcontroller The device 1 displays the temperature, voltage, current and remaining capacity information of the battery 8 through the display module 7 . When the temperature information of one or more batteries 8 in the battery pack is higher than the temperature upper limit, the microcontroller 1 sends a control signal to the drive module 6, and the drive module 6 drives the pump 11 to start working, pumping the coolant into the batteries 8 correspondingly In the heat conduction circulation pipe 13, and the driving module 6 controls the opening of the solenoid valve 15 according to the real-time measured temperature, thereby adjusting the flow rate of the coolant in the heat conduction circulation pipe 13 until the temperature information of one or more batteries 8 in the battery pack reaches In a reasonable temperature range, close the solenoid valve 15 on the liquid branch pipe corresponding to the heat conduction circulation pipe 13; when the temperature information of one or more batteries 8 in the battery pack is lower than the lower temperature limit, the microcontroller 1 sends a control signal For the heating unit 4 and the driving module 6, the heating resistance wire in the heating unit 4 heats the heating liquid, the driving module 6 drives the pump 11 to start working, and pumps the heating liquid into the heat conduction circulation pipe 13, and the driving module 6 according to the real-time measurement The temperature controls the opening of the solenoid valve 15, thereby adjusting the flow rate of the heating fluid in the heat conduction circulation pipe 13, until the temperature of one or more batteries 8 in the battery pack reaches a reasonable temperature range, and closes the liquid branch corresponding to the corresponding heat conduction circulation pipe 13 Solenoid valve 15 on the pipe.

The above is only an embodiment of the utility model, and does not limit the utility model in any way. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the utility model still belong to the utility model. Within the scope of protection of new technical solutions.

Claims (9)

1. a kind of battery for electric automobile heat management system, it is characterised in that：Including battery base (9), and battery base (9) can Dismantle the battery case (16) of connection, the cell apparatus for providing electric energy to electric automobile and for heat being carried out to cell apparatus The thermal management device of battery of management, the cell apparatus include the reserving liquid tank (10) for being arranged on battery base (9) side and set The set of cells on battery base (9) and pump (11) is put, the set of cells includes multiple batteries (8), each battery (8) Side is provided with the thermal baffle (12) on battery base (9), and the opposite side of each battery (8) is fixed to be connected The heat conduction circulating pipe (13) for radiating is connected to, on battery (8) and heat conduction circulating pipe (13), thermocouple (14) is provided with, The entrance of pump (11) is connected by the first mozzle with reserving liquid tank (10), and the outlet of pump (11) connects liquid main line pipe, Liquid main line pipe connects multiple liquid bypass ducts, each described liquid bypass duct respectively with heat conduction circulating pipe (13) each described Entrance connect, the outlet of each heat conduction circulating pipe (13) is connected with reserving liquid tank (10) by the second mozzle, each Electromagnetic valve (15), the liquid storage are mounted at the liquid bypass duct and the interface position of each heat conduction circulating pipe (13) Case (10) is built with heating liquid or coolant.

2. according to a kind of battery for electric automobile heat management system described in claim 1, it is characterised in that：The battery thermal Reason device is included microcontroller (1) and is connected with microcontroller (1) and for detecting battery (8) voltage, electric current and remaining appearance The battery management chip (5) of amount, the input of microcontroller (1) are terminated with Keysheet module (3) and thermocouple (14) are gathered To the signal processing circuit (2) that processed of temperature information, the output of microcontroller (1) be terminated with display module (7), For to heating the heating unit (4) of liquid heating and being used for the drive module (6) of transfer tube (11) and electromagnetic valve (15).

3. according to a kind of battery for electric automobile heat management system described in claim 1, it is characterised in that：The battery case (16) bottom is provided with plugboard (17), is provided with first for inserting the plugboard (17) on battery base (9) Slot, the second slot for inserting the battery (8) and the 3rd slot for inserting the thermal baffle (12).

4. according to a kind of battery for electric automobile heat management system described in claim 1, it is characterised in that：The liquid main line Pipe, liquid bypass duct and the second mozzle are arranged at the bottom of battery base (9), the length direction of battery base (9) Both sides are respectively arranged with first through hole and the second through hole passed through for the second mozzle that bypass duct for liquid is passed through.

5. according to a kind of battery for electric automobile heat management system described in claim 1, it is characterised in that：Battery (8) It is bonding with heat conductive silica gel between heat conduction circulating pipe (13).

6. according to a kind of battery for electric automobile heat management system described in claim 1, it is characterised in that：Multiple batteries (8) connect.

7. according to a kind of battery for electric automobile heat management system described in claim 1, it is characterised in that：The heat conduction circulation Pipe (13) is multi-stage U-shaped pipe.

8. according to a kind of battery for electric automobile heat management system described in claim 2, it is characterised in that：The heating unit (4) accessory power supply and the resistive heater connected with accessory power supply are included.

9. according to a kind of battery for electric automobile heat management system described in claim 1, it is characterised in that：The battery management Chip (5) is lithium battery managing chip OZ890.