Heating device and temperature control system of automobile battery pack

Abstract

The utility model provides a heating device of an automobile battery pack. The heating device of the automobile battery pack comprises a water pump (10), a heating element (20), a water pump controller (30) and a whole automobile controller (40). The water pump can be connected with the water tank and the battery pack to form a circulating waterway and can drive liquid to circularly flow between the water tank and the battery pack. The heating element is arranged in the water pump and can heat liquid flowing through the water pump under the condition of being powered on. The water pump controller is connected with the water pump and the heating element and further used for being connected with a high-voltage power source. The vehicle control unit is connected with the water pump controller and used for controlling the water pump controller. The heating device of the automobile battery pack is few in parts, simple in control logic, low in cost and convenient for spatial arrangement.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a heating device and a temperature control system for an automobile battery pack. Background Art

[0002] The battery pack of an electric vehicle usually needs to be cooled by a cooling device to prevent the temperature of the battery module from rising too high, thereby causing the risk of thermal runaway. At the same time, when the ambient temperature is low, the battery pack needs to be heated to prevent the capacity and performance of the battery pack from decreasing. At present, the heating device of the battery pack has many parts, and there are problems such as complex control logic, high cost and inconvenient space layout. Utility Model Content

[0003] The utility model aims to provide a heating device for an automobile battery pack, which has fewer parts, simple control logic, low cost and convenient space layout.

[0004] Another object of the utility model is to provide a temperature control system for an automobile battery pack, wherein the heating device has fewer parts, simple control logic, low cost, and convenient space layout.

[0005] The utility model provides a heating device for a car battery pack, comprising a water pump, a heating element, a water pump controller and a vehicle controller. The water pump can connect a water tank and a battery pack to form a circulating water circuit, and the water pump can drive liquid to circulate between the water tank and the battery pack. The heating element is arranged in the water pump, and the heating element can heat the liquid flowing through the water pump when powered. The water pump controller connects the water pump and the heating element, and the water pump controller is also used to connect a high-voltage power supply. The vehicle controller is connected to the water pump controller, and the vehicle controller is used to control the water pump controller.

[0006] The heating device for the automobile battery pack provided by the utility model arranges the heating element inside the water pump and is controlled by the water pump controller and the vehicle controller, has few parts, simple control logic, low cost, and convenient space layout.

[0007] In another schematic implementation of the heating device for an automobile battery pack, the vehicle controller is used to obtain the temperature of each battery cell of the battery pack, and send a control signal to the water pump controller according to the temperature of each battery cell. The water pump controller connects or disconnects the water pump and the heating element to the high-voltage power supply according to the control signal.

[0008] In another schematic implementation of the heating device of a vehicle battery pack, when the temperature of a battery cell is lower than a first preset temperature, the vehicle controller sends a control signal to the water pump controller to connect the water pump and the heating element to the high-voltage power supply; when the temperature of each battery cell is greater than or equal to the first preset temperature, the vehicle controller sends a control signal to the water pump controller to disconnect the heating element from the high-voltage power supply.

[0009] In another schematic implementation of the heating device of a vehicle battery pack, when the temperature of each battery cell is greater than or equal to a first preset temperature and the temperature difference of each battery cell is less than a second preset temperature, the vehicle controller sends a control signal to the water pump controller to disconnect the water pump from the high-voltage power supply.

[0010] In another exemplary embodiment of the heating device for the automobile battery pack, the first preset temperature is 15°C and the second preset temperature is 3°C.

[0011] In another exemplary embodiment of the heating device for the automobile battery pack, the heating element is a resistance wire.

[0012] The utility model also provides a temperature control system for a vehicle battery pack, comprising a water tank, a refrigerator and a heating device for the vehicle battery pack. The water tank is used to store coolant. The refrigerator can cool the coolant passing through. The water pump connects the water tank, the refrigerator and the battery pack to form a circulating water circuit.

[0013] In another exemplary embodiment of the temperature control system of the automobile battery pack, the vehicle controller can control the start or stop of the refrigerator according to the temperature of each battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0015] Figure 1 A schematic structural diagram of an exemplary implementation of a heating device for a vehicle battery pack.

[0016] Figure 2 This is a schematic diagram of the usage status of the heating device of the automobile battery pack.

[0017] Description of symbols

[0018] 10 Water Pump

[0019] 20 Heating element

[0020] 30 Water pump controller

[0021] 40 Vehicle Controller

[0022] 50 Water tank

[0023] 60 Refrigeration machine

[0024] 70 battery pack. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0026] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0027] Figure 1 The structure diagram of a schematic embodiment of a heating device for a vehicle battery pack is shown in FIG. Figure 1 The heating device of the automobile battery pack includes a water pump 10, a heating element 20, a water pump controller 30 and a vehicle controller 40.

[0028] Figure 2 This is a schematic diagram of the use of the heating device of the automobile battery pack. Figure 2 The water pump 10 can connect the water tank and the battery pack 70 to form a circulating water circuit, and the water pump 10 can drive the liquid to circulate between the water tank and the battery pack 70. The heating element 20 is disposed in the water pump 10, and the heating element 20 can heat the liquid flowing through the water pump 10 when powered. In the exemplary embodiment, the heating element 20 is a resistance wire. However, it is not limited to this. In other exemplary embodiments, the heating element 20 can also be other components that can be disposed in the water pump 10 and can be heated.

[0029] The water pump controller 30 is connected to the water pump 10 and the heating element 20, and is also used to connect to a high-voltage power supply. The water pump controller 30 connects or disconnects the water pump 10 and the heating element 20 to the high-voltage power supply according to a control signal.

[0030] The vehicle controller 40 is connected to the water pump controller 30, and the vehicle controller 40 is used to control the water pump controller 30. Specifically, the vehicle controller 40 is used to obtain the temperature of each battery cell of the battery pack 70, and send a control signal to the water pump controller 30 according to the temperature of each battery cell. The water pump controller 30 connects or disconnects the water pump 10 and the heating element 20 with the high-voltage power supply according to the control signal, and then heats the battery pack 70 through the water pump 10 and the heating element 20.

[0031] The heating device for the automobile battery pack provided by the utility model sets the heating element 20 inside the water pump 10 and is controlled by the water pump controller 30 and the vehicle controller 40. It has few parts, simple control logic, low cost, and convenient space layout.

[0032] In an exemplary embodiment, when the temperature of a battery cell is lower than a first preset temperature, the vehicle controller 40 sends a control signal to the water pump controller 30 to connect the water pump 10 and the heating element 20 to the high-voltage power supply, and the water pump 10 and the heating element 20 simultaneously start to cyclically heat the battery pack 70. When the temperature of each battery cell is greater than or equal to the first preset temperature, the vehicle controller 40 sends a control signal to the water pump controller 30 to disconnect the heating element 20 from the high-voltage power supply, and then stops heating the battery pack 70. In an exemplary embodiment, the first preset temperature is 15°C.

[0033] In an exemplary embodiment, when the temperature of each battery cell is greater than or equal to the first preset temperature, and the temperature difference of each battery cell is less than a second preset temperature, the vehicle controller 40 sends a control signal to the water pump controller 30 to disconnect the water pump 10 from the high-voltage power supply. Although the temperature of each battery cell has reached the first preset temperature, there is a large temperature difference between each battery cell, which will still affect the performance of the battery pack 70. At this time, when the heating element 20 is disconnected from the high-voltage power supply, the water pump 10 is still connected to the high-voltage power supply. The water pump 10 can drive the liquid to circulate between the battery packs 70, balance the temperature of each battery cell to reduce the temperature difference, and disconnect the water pump 10 from the high-voltage power supply when the temperature difference is less than the second preset temperature to stop the circulation of the liquid. In an exemplary embodiment, the second preset temperature is 3°C.

[0034] The utility model also provides a temperature control system for a vehicle battery pack. Figure 2 The temperature control system of the automobile battery pack includes a water tank 50, a refrigerator 60 and a heating device for the automobile battery pack.

[0035] The water tank 50 is used to store the coolant. The refrigerator 60 is capable of cooling the coolant passing through. The water pump 10 connects the water tank 50, the refrigerator 60 and the battery pack 70 to form a circulating water circuit. In the exemplary embodiment, the vehicle controller 40 is also used to control the refrigerator 60 to start or stop according to the temperature of each battery cell.

[0036] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0037] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present utility model. They are not intended to limit the scope of protection of the present utility model. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present utility model, such as combination, division or repetition of features, should be included in the scope of protection of the present utility model.

Claims

1. A heating device for a car battery pack, characterized in that: include: a water pump (10) capable of connecting the water tank and the battery pack to form a circulating water circuit, wherein the water pump (10) is capable of driving liquid to circulate between the water tank and the battery pack; a heating element (20) disposed in the water pump (10), the heating element (20) being capable of heating liquid flowing through the water pump (10) when powered; a water pump controller (30), connected to the water pump (10) and the heating element (20), the water pump controller (30) being further used to connect to a high-voltage power supply; and A vehicle controller (40) is connected to the water pump controller (30), and the vehicle controller (40) is used to control the water pump controller (30).

2. The heating device for the automotive battery pack according to claim 1, characterized in that: The vehicle controller (40) is used to obtain the temperature of each battery cell of the battery pack and send a control signal to the water pump controller (30) according to the temperature of each battery cell. The water pump controller (30) connects or disconnects the water pump (10) and the heating element (20) to the high-voltage power supply according to the control signal.

3. The heating device for the automotive battery pack according to claim 2, characterized in that: When the temperature of the battery cells is lower than a first preset temperature, the vehicle controller (40) sends the control signal to the water pump controller (30) to connect the water pump (10) and the heating element (20) to the high-voltage power supply; and when the temperature of each battery cell is greater than or equal to the first preset temperature, the vehicle controller (40) sends the control signal to the water pump controller (30) to disconnect the heating element (20) from the high-voltage power supply.

4. The heating device for the automotive battery pack according to claim 3, characterized in that: When the temperature of each battery core is greater than or equal to the first preset temperature, and the temperature difference of each battery core is less than a second preset temperature, the vehicle controller (40) sends the control signal to the water pump controller (30) to disconnect the water pump (10) from the high-voltage power supply.

5. The heating device for the automotive battery pack according to claim 4, characterized in that: The first preset temperature is 15°C, and the second preset temperature is 3°C.

6. The heating device for a vehicle battery pack according to claim 1, characterized in that: The heating element (20) is a resistance wire.

7. The temperature control system of the automobile battery pack is characterized in that: include: a water tank (50) for storing coolant; a refrigerator (60) capable of cooling the passing coolant; as well as A heating device for an automobile battery pack according to any one of claims 1 to 6, wherein the water pump (10) is connected to the water tank (50), the refrigerator (60) and the battery pack to form a circulating water circuit.

8. The temperature control system of the automotive battery pack according to claim 7, characterized in that: The vehicle controller (40) can control the refrigerator (60) to start or stop according to the temperature of each battery core.

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