Battery thermal management system for double-unit electric wide-body vehicle

Abstract

The utility model relates to the technical field of battery thermal management systems, in particular to a battery thermal management system of a double-unit electric wide-body vehicle. Comprising a master thermal management unit and a slave thermal management unit which are identical, a host controller of the master thermal management unit is in communication connection with the whole machine, a slave controller of the slave thermal management unit is in communication with the whole machine through the host controller, a master / slave definition module of the slave controller is communicated with a grounding signal, and the master / slave definition module of the host controller is suspended; the master heat management unit and the slave heat management unit are communicated with the waterway assembly, and the other end of the waterway assembly is communicated with a waterway channel in the power battery pack. The problem of automatic networking of heat management units of the same model is solved, the working states of the master and slave machines are distinguished by setting grounding signals through the slave machines, the installation is convenient, and a background control system is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of battery thermal management systems, and specifically relates to a battery thermal management system for a dual-unit electric wide-body vehicle. Background Art

[0002] With the increasing demand for the electric quantity of electric wide-body vehicles, the demand for refrigeration and heating of the battery thermal management system has increased. Limited by the refrigeration capacity of a single unit, it is considered to use a dual-unit, and the main unit and the slave unit need to be made into different models for differential control. In order for the vehicle communication system to identify the signals of which unit, the installation methods of the two types of thermal management units are more complex, and two sets of corresponding control software are also required. In terms of use, installing two thermal management units of the same model can optimize the entire system more. However, how to network the two thermal management units of the same model to distinguish them at the vehicle communication end is a problem to be solved. Content of the Utility Model

[0003] Problem to be Solved: Two thermal management units of the same model are used in the battery thermal management system and the status of each unit can be distinguished at the vehicle end.

[0004] To achieve the above object, the utility model provides the following technical solution: A battery thermal management system for a dual-unit electric wide-body vehicle, including a main thermal management unit and a slave thermal management unit that are exactly the same. The host controller of the main thermal management unit is communicatively connected to the whole vehicle. The slave controller of the slave thermal management unit communicates with the whole vehicle through the host controller. The master / slave definition module of the slave controller is connected to the ground signal, and the master / slave definition module of the host controller is suspended; both the main thermal management unit and the slave thermal management unit are connected to a water circuit assembly, and the other end of the water circuit assembly is connected to the water channel in the power battery pack.

[0005] Preferably, the power battery pack includes battery one and battery two, and battery one and battery two are respectively connected to the water circuit assembly.

[0006] Preferably, the water circuit assembly includes a main inlet pipe and a main outlet pipe. One end of the main inlet pipe near battery one is divided into a battery inlet pipe one and a battery inlet pipe two. The battery inlet pipe one is connected to battery one, and the battery inlet pipe two is connected to battery two; the water in battery one flows back to the main outlet pipe through the battery outlet pipe one, and the water in battery two flows back to the main outlet pipe through the battery outlet pipe two.

[0007] Preferably, the main inlet pipe is connected to the main thermal management unit through the host outlet pipe, the main inlet pipe is connected to the slave thermal management unit through the slave outlet pipe, the main outlet pipe is connected to the main thermal management unit through the host inlet pipe, and the main outlet pipe is connected to the slave thermal management unit through the slave inlet pipe.

[0008] Preferably, an expansion tank is provided at one end of the main outlet pipe away from the power battery pack.

[0009] Compared with the prior art, the utility model provides a battery thermal management system for a double-unit electric wide-body vehicle, which has the following beneficial effects:

[0010] 1. The utility model solves the problem of automatic networking of thermal management units of the same model. By setting the grounding signal of the slave unit to distinguish the working states of the master unit and the slave unit respectively, the installation is convenient and the background control system is simplified;

[0011] 2. Unitized design is convenient for maintenance. If there is any damage, just replace it with the same model;

[0012] 3. The water circuit components supply water to the first battery and the second battery in two separate paths. After the outlet pipes of the first battery and the second battery converge, they are divided into two paths and enter the main thermal management unit and the slave thermal management unit for cooling. This can ensure the stability of the entire water circuit. Combined with the expansion tank to adjust the pressure of the water circuit, the stable operation of the system is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the system structure diagram of the utility model.

[0014] Figure 2 It is the schematic diagram of the networking structure of the utility model.

[0015] Figure 3 It is the signal transmission schematic diagram of the main thermal management unit and the slave thermal management unit of the utility model.

[0016] Description of the reference numerals: 1, power battery pack; 11, the first battery; 12, the second battery; 2, water circuit component; 21, the first battery inlet pipe; 22, the second battery inlet pipe; 23, the first battery outlet pipe; 24, the second battery outlet pipe; 201, main inlet pipe; 202, main outlet pipe; 25, main unit inlet pipe; 26, slave unit inlet pipe; 27, main unit outlet pipe; 28, slave unit outlet pipe; 3, expansion tank; 4, main thermal management unit; 41, main unit controller; 5, slave thermal management unit; 51, slave unit controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will describe the technical solutions in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model:

[0018] As shown in the figure, a battery thermal management system for a dual-unit electric wide-body vehicle includes exactly the same main thermal management unit 4 and slave thermal management unit 5. The controller of the main thermal management unit 4 is the host controller 41, and the controller of the slave thermal management unit 5 is the slave controller 51. The host controller 41 is directly connected to the whole machine for communication, while the slave controller 51 is connected to the whole machine for communication through the host controller 41; both the host controller 41 and the slave controller 51 are provided with a master / slave definition module. The master / slave definition module of the slave controller 51 is not floating and is connected to the ground signal, and the master / slave definition module of the host controller 41 is floating; both the main thermal management unit 4 and the slave thermal management unit 5 are connected to the waterway assembly 2, and the other end of the waterway assembly 2 is connected to the waterway channel in the power battery pack 1. The power battery pack 1 includes battery one 11 and battery two 12. The waterway assembly 2 includes a main inlet pipe 201 and a main outlet pipe 202. One end of the main inlet pipe 201 near the battery one 11 is divided into a battery inlet pipe one 21 and a battery inlet pipe two 22. The battery inlet pipe one 21 is connected to the battery one 11, and the battery inlet pipe two 22 is connected to the battery two 12; the water in the battery one 11 flows back to the main outlet pipe 202 through the battery outlet pipe one 23, and the water in the battery two 12 flows back to the main outlet pipe 202 through the battery outlet pipe two 24. The main inlet pipe 201 is connected to the main thermal management unit 4 through the host outlet pipe 27, and the main inlet pipe 201 is connected to the slave thermal management unit 5 through the slave outlet pipe 28. The main outlet pipe 202 is connected to the main thermal management unit 4 through the host inlet pipe 25, and the main outlet pipe 202 is connected to the slave thermal management unit 5 through the slave inlet pipe 26. Such a design forms a water loop centered on the main inlet pipe 201 and the main outlet pipe 202. The water converges to the main inlet pipe 201 after being cooled by the main thermal management unit 4 and the slave thermal management unit 5. The main inlet pipe 201 is divided into two paths, namely the battery inlet pipe one 21 and the battery inlet pipe two 22, which respectively supply the battery one 11 and the battery two 12. The water absorbs the heat of the battery one 11 and the battery two 12 and becomes water with a higher temperature. The water with a higher temperature in the battery one 11 and the battery two 12 converges to the main outlet pipe 202, and the main outlet pipe 202 then supplies the water with a better temperature to the main thermal management unit 4 and the slave thermal management unit 5 respectively for cooling, forming a water cooling circulation loop. An expansion tank 3 is connected before the main outlet pipe 202 is divided into the slave inlet pipe 26 and the host inlet pipe 25. When the water pressure in the water loop is insufficient, the expansion tank 3 provides replenishment for the water loop; when the pressure in the water loop is too high, the pressure is reduced through the pressure relief valve of the expansion tank 3.

[0019] The working states of the main heat management unit 4 and the slave heat management unit 5 communicate with the whole vehicle through their respective controllers. Both the main heat management unit 4 and the slave heat management unit 5 are provided with two-way CAN communications, namely CAN0 and CAN1. The main heat management unit 4, as the host, communicates with the whole vehicle through CAN0, and the internal working components of the main heat management unit 4 send their working states to CAN1 of the host controller 41. The slave heat management unit 5, as the slave, sends the working states of its internal working components to CAN1 of the slave controller 51. This working state is regarded as the first working state. The CAN1 signal received by the slave controller 51 is converted by the slave controller 51. CAN1 is converted into a second set of working state signals, and the second set of working state signals carry a ground signal. The converted second set of working state signals is sent to CAN1 of the host controller 41 through CAN0 of the slave controller 51, and is forwarded to the whole vehicle communication CAN line through CAN0 of the host controller 41. The whole vehicle communication determines the distinction of the working states of the master and slave units by judging whether the received signal carries a ground signal. If there is a ground signal, it is the working state of the slave heat management unit 5; if there is no ground signal, it is the working state of the main heat management unit 4. The battery heat management system of the present utility model determines the master-slave definition of the unit by whether there is a ground signal, so as to realize the distinction of the feedback of the working states of the master and slave units.

[0020] The above embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

Claims

1. A battery thermal management system for a double-unit electric wide-body vehicle, characterized in that: It includes exactly the same main heat management unit (4) and slave heat management unit (5). The main controller (41) of the main heat management unit (4) is communicatively connected to the whole machine. The slave controller (51) of the slave heat management unit (5) communicates with the whole machine through the main controller (41). The master / slave definition module of the slave controller (51) is connected to the ground signal, and the master / slave definition module of the main controller (41) is left floating. Both the main heat management unit (4) and the slave heat management unit (5) are connected to the waterway assembly (2), and the other end of the waterway assembly (2) is connected to the waterway channel in the power battery pack (1).

2. The battery thermal management system for a double-unit electric wide-body vehicle according to claim 1, characterized in that: The power battery pack (1) includes battery one (11) and battery two (12), and battery one (11) and battery two (12) are respectively connected to the waterway assembly (2).

3. The battery thermal management system for a dual-unit electric wide-body vehicle according to claim 2, wherein: The waterway assembly (2) includes a main water inlet pipe (201) and a main water outlet pipe (202). One end of the main water inlet pipe (201) near battery one (11) is divided into a battery water inlet pipe one (21) and a battery water inlet pipe two (22). The battery water inlet pipe one (21) is connected to battery one (11), and the battery water inlet pipe two (22) is connected to battery two (12). The water in battery one (11) flows back to the main water outlet pipe (202) through the battery water outlet pipe one (23), and the water in battery two (12) flows back to the main water outlet pipe (202) through the battery water outlet pipe two (24).

4. The battery thermal management system for a dual-unit electric wide-body vehicle according to claim 3, wherein: The main water inlet pipe (201) is connected to the main heat management unit (4) through the main machine outlet pipe (27), and the main water inlet pipe (201) is connected to the slave heat management unit (5) through the slave machine outlet pipe (28). The main water outlet pipe (202) is connected to the main heat management unit (4) through the main machine inlet pipe (25), and the main water outlet pipe (202) is connected to the slave heat management unit (5) through the slave machine inlet pipe (26).

5. The battery thermal management system for a dual-unit electric wide-body vehicle according to claim 3, wherein: An expansion tank (3) is provided at one end of the main water outlet pipe (202) away from the power battery pack (1).

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