Vehicle-mounted battery thermal management system

Abstract

The utility model belongs to the field of vehicles, and particularly relates to a vehicle-mounted battery thermal management system. The system comprises a power battery, a circulating pipeline is arranged in the power battery, the system further comprises a storage device, a liquid return port and a liquid outlet are formed in the storage device, one end of the circulating pipeline is connected with the liquid return port, the liquid outlet is connected with a circulating pump through a pipeline, the system further comprises an external heat exchanger, and the external heat exchanger comprises a primary side and a secondary side. The other end of the circulating pump is connected with one connector of the primary side of the external heat exchanger, the other end of the circulating pipeline is connected with the other connector of the primary side of the external heat exchanger, and two external connectors are arranged at the two ends of the secondary side of the external heat exchanger respectively. The external cooling liquid is introduced into the secondary side of the external heat exchanger to conduct heat management on the power battery, the temperature of the power battery can be better controlled, and meanwhile when the vehicle is charged, an air conditioning system of the vehicle does not need to be started to conduct heat management on the power battery.

Description

Technical Field

[0001] The utility model belongs to the field of vehicles, and in particular relates to a vehicle-mounted battery thermal management system. Background Art

[0002] In the prior art, in order to improve the working condition of the power battery, people set up circulation pipelines in the power battery to control the temperature of the power battery. In the prior art, the temperature of the power battery is mainly managed through the vehicle's air-conditioning system. On the one hand, the air-conditioning system is used to manage the temperature of the power battery, which increases the energy consumption of the vehicle. On the other hand, the power of the air-conditioning system is limited. Frequent use of the temperature pipeline of the power battery may cause the air-conditioning system to have insufficient cooling or heating effect on the vehicle, affecting the consumer's user experience. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the utility model improves the on-board battery thermal management system, so that the external cooling system can perform thermal management of the power battery when the vehicle is parked for charging, avoiding the situation where the power battery is charging and discharging at the same time, and facilitating better thermal management of the vehicle when charging.

[0004] The technical solution of the utility model is as follows:

[0005] An on-vehicle battery thermal management system includes a power battery, a circulation pipeline is provided in the power battery, and a memory is provided. The memory is provided with a liquid return port and a liquid outlet, one end of the circulation pipeline is connected to the liquid return port, and the liquid outlet is connected to a circulation pump through a pipeline. It is characterized in that it also includes an external heat exchanger, the external heat exchanger includes a primary side and a secondary side, the other end of the circulation pump is connected to an interface on the primary side of the external heat exchanger, the other end of the circulation pipeline is connected to another interface on the primary side of the external heat exchanger, and two external connectors are respectively provided at both ends of the secondary side of the external heat exchanger.

[0006] It also includes an internal heat exchanger, which includes a primary side and a secondary side. One interface on the primary side of the internal heat exchanger is connected to the other end of the circulation pump, and another interface on the primary side of the internal heat exchanger is connected to an interface on the primary side of the external heat exchanger. The two interfaces on the secondary side of the internal heat exchanger are connected to the vehicle's air conditioning cooling system.

[0007] The air conditioning cooling system includes a compressor, a condenser and an expansion valve. One end of the compressor is connected to an interface on the secondary side of the internal heat exchanger, the other end of the compressor is connected to one end of the condenser, the other end of the condenser is connected to the expansion valve, and the other end of the expansion valve is connected to another interface on the secondary side of the internal heat exchanger.

[0008] It also includes a cooling fan, which acts on the condenser.

[0009] The technical solution of the present invention has the following beneficial effects: the present invention adds an external heat exchanger, and introduces external coolant on the secondary side of the external heat exchanger to perform thermal management of the power battery, which can better control the temperature of the power battery. At the same time, when the vehicle is charging, there is no need to activate the vehicle's air-conditioning system to perform thermal management of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a system configuration diagram of a solution of the utility model;

[0011] Figure 2 This is a system configuration diagram of another solution of the utility model;

[0012] In the figure, 1 is the power battery, 10 is the circulation pipeline,

[0013] 2 is the storage device, 20 is the liquid return port, 21 is the liquid outlet, 22 is the circulation pump, 23 is the external heat exchanger, 230 is the external connector,

[0014] 24 is an internal heat exchanger,

[0015] 25 is an air conditioning cooling system, 250 is a compressor, 251 is a condenser, 252 is an expansion valve, and 253 is a cooling fan. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0017] It should be noted that when an element is referred to as being "disposed on" or "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is referred to as being "fixed on" another element, or "fixedly connected" to another element, they may be fixed in a detachable manner or in a non-detachable manner. When an element is considered to be "connected" or "rotatably connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used are for illustrative purposes only and do not represent the only implementation method.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to constrain the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] The terms "first", "second", "third" and the like in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0020] See also Figure 1 As shown, a vehicle-mounted battery thermal management system includes a power battery 1. The power battery described herein is installed on a vehicle. A circulation pipeline 10 is provided in the power battery 1. The circulation pipeline 10 is used for the flow of coolant, which can better control the temperature of the power battery and ensure that the power battery is in the optimal charging or discharging temperature range. It also includes a memory 2, which is used to store coolant. The memory 2 is provided with a liquid return port 20 and a liquid outlet 21. One end of the circulation pipeline 10 is connected to the liquid return port 20, and the liquid outlet 20 is connected to a circulation pump 22 through a pipeline. It also includes an external heat exchanger 23, which includes a primary side and a secondary side. The other end of the circulation pump 22 is connected to an interface on the primary side of the external heat exchanger, and the other end of the circulation pipeline 10 is connected to another interface on the primary side of the external heat exchanger. Two external connectors 230 are respectively provided at both ends of the secondary side of the external heat exchanger 23, and the external connectors are used to connect to an external cold source.

[0021] During use, the circulation pump drives the coolant to flow on the primary side of the external heat exchanger and in the circulation pipeline. The flow of coolant dissipates heat or heats the power battery. After the external connector is connected to the external cold source, the refrigerant of the external cold source enters the secondary side of the external heat exchanger through the pipeline. The refrigerant and coolant exchange heat in the external heat exchanger, thereby controlling the temperature of the power battery and enabling better temperature management when the vehicle is charging.

[0022] See also Figure 2As shown, it also includes an internal heat exchanger 24, which includes a primary side and a secondary side. One interface on the primary side of the internal heat exchanger 24 is connected to the other end of the circulation pump, and the other interface on the primary side of the internal heat exchanger is connected to an interface on the primary side of the external heat exchanger 23. The two interfaces on the secondary side of the internal heat exchanger 24 are connected to the vehicle's air-conditioning cooling system 25. The air-conditioning cooling system can cool and exchange heat with the coolant in the circulation pipeline of the power battery through the internal heat exchanger, thereby managing the temperature of the power battery and realizing a thermal management cycle in the vehicle. When the vehicle is traveling at different latitudes, the vehicle can self-regulate according to the corresponding climate environment, which is more conducive to the operation of the power battery.

[0023] The air conditioning cooling system 25 includes a compressor 250, a condenser 251 and an expansion valve 252. One end of the compressor is connected to an interface on the secondary side of the internal heat exchanger, the other end of the compressor is connected to one end of the condenser, the other end of the condenser is connected to the expansion valve, and the other end of the expansion valve is connected to another interface on the secondary side of the internal heat exchanger.

[0024] The device further comprises a heat dissipation fan 253, which acts on the condenser.

[0025] The technical solution of the present invention has the following beneficial effects: the present invention adds an external heat exchanger, and introduces external coolant on the secondary side of the external heat exchanger to perform thermal management of the power battery, which can better control the temperature of the power battery. At the same time, when the vehicle is charging, there is no need to activate the vehicle's air-conditioning system to perform thermal management of the power battery.

[0026] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

Claims

1. A vehicle-mounted battery thermal management system, comprising a power battery, a circulation pipeline provided within the power battery, and a storage device, wherein the storage device is provided with a liquid return port and a liquid outlet, one end of the circulation pipeline being connected to the liquid return port, and the liquid outlet being connected to a circulation pump via a pipeline, characterized in that: It also includes an external heat exchanger, which includes a primary side and a secondary side. The other end of the circulation pump is connected to an interface on the primary side of the external heat exchanger, and the other end of the circulation pipeline is connected to another interface on the primary side of the external heat exchanger. Two external connectors are respectively provided at both ends of the secondary side of the external heat exchanger.

2. The vehicle-mounted battery thermal management system according to claim 1, characterized in that: It also includes an internal heat exchanger, which includes a primary side and a secondary side. One interface on the primary side of the internal heat exchanger is connected to the other end of the circulation pump, and another interface on the primary side of the internal heat exchanger is connected to an interface on the primary side of the external heat exchanger. The two interfaces on the secondary side of the internal heat exchanger are connected to the vehicle's air conditioning cooling system.

3. The vehicle-mounted battery thermal management system according to claim 2, characterized in that: The air conditioning cooling system includes a compressor, a condenser and an expansion valve. One end of the compressor is connected to an interface on the secondary side of the internal heat exchanger, the other end of the compressor is connected to one end of the condenser, the other end of the condenser is connected to the expansion valve, and the other end of the expansion valve is connected to another interface on the secondary side of the internal heat exchanger.

4. The vehicle-mounted battery thermal management system according to claim 3, characterized in that: It also includes a cooling fan, which acts on the condenser.

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