Optimized arrangement structure of top and bottom liquid cooling battery pack heat management pipeline

Abstract

The utility model discloses top and bottom liquid cooling battery pack heat management pipeline optimal arrangement structure, including battery pack and the top liquid cooling board of arrangement in the top of battery pack and the bottom liquid cooling board of arrangement in the bottom of battery pack, bottom liquid cooling board horizontal extension to the box outside of battery pack and is welded with three -way valve, the box of battery pack is outwardly installed with the wall -penetrating joint from the inside of battery pack, and one end is connected with top liquid cooling board through internal pipeline, and the other end is located the box outside of battery pack and is connected with wall -penetrating quick plug connector, and wall -penetrating quick plug connector is connected with external pipeline, and the other end is connected with three -way valve through three -way quick plug connector. The utility model discloses can satisfy battery pack high current fast charge and the high heat power liquid cooling scheme of electric core of battery pack simultaneously, can effectively reduce the security risk of battery pack inside because of the poor connection of pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack thermal management technology, specifically relating to the optimized layout structure of thermal management pipelines for top and bottom liquid-cooled battery packs. Background Technology

[0002] With the development of the new energy industry, new energy vehicles are currently moving towards super-fast charging, resulting in large capacity, high voltage, and high current. This places particularly high demands on the thermal management of the battery pack, leading to a shift from the original bottom / top liquid cooling to a top and bottom dual-sided liquid cooling solution. The current conventional solution involves two external water inlets (inlet and outlet) to the battery pack, which are welded to the casing and then connected to the top and bottom liquid cooling plates (e.g., [missing information]). Figure 5 , Figure 6 (As shown).

[0003] The above solution implements the connection scheme of the top and bottom liquid cooling plates for high-rate fast charging regarding the liquid cooling pipeline. All pipeline connections are inside the battery pack. During the production process, due to limited operating space, there are instances where quick-connect connectors are not properly inserted. In such cases, the airtightness test cannot detect the abnormality during the battery pack's production line. After installation in the vehicle, factors such as vibration and coolant flow during vehicle operation may lead to poor pipeline sealing, resulting in leakage within the battery pack in the market. Leakage within the battery pack can cause insulation failure, leading to safety risks such as electric shock, and in severe cases, it can cause the battery pack to catch fire. Utility Model Content

[0004] The purpose of this utility model is to provide an optimized arrangement structure for the thermal management pipeline of a top-bottom liquid-cooled battery pack, which can meet the requirements of high-current fast charging of the battery pack and high-heat-generating liquid cooling of the battery cells, while effectively reducing the safety risks caused by poor pipeline connection within the battery pack.

[0005] To achieve the above objectives, this utility model provides an optimized layout structure for the thermal management pipeline of a top-bottom liquid-cooled battery pack. The structure includes a battery pack, a top liquid-cooling plate at the top of the battery pack, and a bottom liquid-cooling plate at the bottom of the battery pack. The bottom liquid-cooling plate extends horizontally to the outside of the battery pack housing and is welded with a three-way valve. A through-wall connector is installed on the battery pack housing from the inside out. One end of the through-wall connector is connected to the top liquid-cooling plate via an internal pipeline, and the other end is located on the outside of the battery pack housing and connected to a quick-connect through-wall connector. An external pipeline is connected to the quick-connect through-wall connector, and the other end of the external pipeline is connected to the three-way valve via a quick-connect through-wall connector.

[0006] As a further embodiment of this utility model: the through-wall connector includes an installation component, a connector body is connected to the installation component, a sealing ring is fitted on the connector body, and a threaded hole is provided on the installation component on the same side as the connector body.

[0007] As a further embodiment of this utility model: the threaded hole is a non-penetrating hole, and the threaded hole, together with the bolt, fixes the through-wall connector, and the compression sealing ring fits against the inner side of the battery pack box.

[0008] As a further embodiment of this utility model: the three-way valve includes a main body, on which are provided a battery pack water nozzle, a bottom liquid cooling plate interface, and a top liquid cooling plate interface. The bottom liquid cooling plate interface is welded to the bottom liquid cooling plate, and the top liquid cooling plate interface is connected to an external pipeline through a three-way quick-connect fitting.

[0009] As a further embodiment of this utility model: the internal pipelines are connected to the top liquid cooling plate and the wall-penetrating joints by means of thermal expansion, and the external pipelines are connected to the wall-penetrating quick-connect joints and the tee quick-connect joints by means of thermal expansion.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] Moving the connecting pipes from inside the battery pack to outside the battery pack ensures stable pipe connections and reduces the risk of coolant leakage from the battery pack.

[0012] The connection operation is carried out on the outside of the battery pack, which provides ample space for assembly, increases the assembly cycle time, and reduces production costs.

[0013] The internal and external piping of the battery pack are connected by through-wall connectors, which use bolt connections to effectively improve the reliability of the connection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the optimized layout of the thermal management pipeline for the top and bottom liquid-cooled battery pack of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the optimized layout of the thermal management pipeline of the top and bottom liquid-cooled battery pack of this utility model.

[0016] Figure 3 This is a schematic diagram of the through-wall connector structure of the optimized layout of the thermal management pipeline of the top and bottom liquid-cooled battery pack of this utility model.

[0017] Figure 4 This is a schematic diagram of the three-way valve structure of the optimized layout of the thermal management pipeline of the top and bottom liquid-cooled battery pack of this utility model.

[0018] Figure 5 This is a schematic diagram of the internal structure of a battery pack using existing technology.

[0019] Figure 6 This is a schematic diagram of the external structure of a battery pack in the existing technology.

[0020] In the diagram: 1. Battery pack, 2. Through-wall quick connector, 3. External piping, 4. T-joint, 5. T-valve, 6. Bottom liquid cooling plate, 7. Housing, 8. Bolt, 9. Top liquid cooling plate, 10. Internal piping, 11. Through-wall connector.

[0021] 5.1 Main body; 5.2 Top liquid cooling plate interface; 5.3 Battery pack water nozzle; 5.4 Bottom liquid cooling plate interface;

[0022] 11.1 Mounting component, 11.2 Threaded hole, 11.3 Connector body, 11.4 Sealing ring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1 and Figure 2 As shown, the optimized layout structure of the thermal management pipeline of the top and bottom liquid-cooled battery pack includes a battery pack 1, a top liquid-cooling plate 9 arranged on the top of the battery pack 1, and a bottom liquid-cooling plate 6 arranged at the bottom of the battery pack 1. The bottom liquid-cooling plate 6 extends horizontally to the outside of the housing 7 of the battery pack 1 and is welded with a three-way valve 5. A wall-penetrating connector 11 is installed on the housing 7 of the battery pack 1 from the inside of the battery pack 1 outward. One end of the wall-penetrating connector 11 is connected to the top liquid-cooling plate 9 through an internal pipeline 10, and the other end is located on the outside of the housing 7 of the battery pack 1 and connected to a wall-penetrating quick-connect connector 2. An external pipeline 3 is connected to the wall-penetrating quick-connect connector 2, and the other end of the external pipeline 3 is connected to the three-way valve 5 through a three-way quick-connect connector 4.

[0025] The bottom liquid cooling plate 6 extends outward from the front end, and the top liquid cooling plate 9 is connected to the wall-penetrating connector 11 through the internal pipe 10, so that the insertion parts of the top liquid cooling plate 9 and the bottom liquid cooling plate 6 are changed from inside the battery pack 1 to outside the battery pack 1, which greatly facilitates the assembly operation.

[0026] In addition, the three-way valve 5 is guided to the outside of the battery pack 1 and connected to the external pipeline 3 through the three-way quick connector 4 and the through-wall quick connector 2. There is ample operating space during the operation, and the detection process can be visually observed, which greatly reduces the risk of leakage of the battery pack 1.

[0027] To ensure the sealing performance of battery pack 1, further measures are taken, such as... Figure 3 As shown, the through-wall connector 11 includes an installation component 11.1, a connector body 11.3 connected to the installation component 11.1, a sealing ring 11.4 fitted on the connector body 11.3, and a threaded hole 11.2 on the same side as the connector body 11.3 on the installation component 11.1.

[0028] Threaded holes 11.2 are symmetrically arranged on both sides of the connector body 11.3. Furthermore, threaded holes 11.2 are non-penetrating holes. Threaded holes 11.2, together with bolts 8, fix the through-wall connector 11 and compress the sealing ring 11.4 to fit against the inner side of the battery pack 1's casing 7. The non-penetrating hole structure of threaded holes 11.2 ensures the sealing of the battery pack 1 after the bolts 8 have completed the fixing of the mounting part 11.1.

[0029] Furthermore, such as Figure 4 As shown, the three-way valve 5 includes a main body 5.1, on which are connected battery pack water nozzle 5.3, bottom liquid cooling plate interface 5.4, and top liquid cooling plate interface 5.2. The bottom liquid cooling plate interface 5.4 is welded to the bottom liquid cooling plate 6, and the top liquid cooling plate interface 5.2 is connected to the external pipeline 3 through a three-way quick connector 4.

[0030] To improve the reliability of the piping connections in battery pack 1, the internal piping 10 is further connected to the top liquid cooling plate 9 and the wall-penetrating connector 11 using thermal expansion joints, as are the external piping 3 and the wall-penetrating quick-connect connector 2 and the tee quick-connect connector 4. Connecting the internal piping 10 using thermal expansion joints allows for reserved space within battery pack 1 for electrical connections, thus improving both the reliability of the piping and electrical connections, and reducing the risk of coolant leakage within battery pack 1.

[0031] In this specific implementation, the internal pipes 10 of the battery pack 1 are all connected using thermal expansion joints. The wall-penetrating connectors 11 are connected and fixed using bolts 8. The two ends of the external pipes 3 are connected to the wall-penetrating quick-connect connectors 2 and tee quick-connect connectors 4 using thermal expansion joints. Then, the wall-penetrating quick-connect connectors 2 and 11 are aligned and connected, and the tee quick-connect connectors 4 are aligned and connected to the tee valve 5. All quick-connect connectors are located on the outside of the battery pack 1, which facilitates assembly and subsequent inspection and maintenance.

Claims

1. An optimized layout structure for thermal management pipelines of a top-bottom liquid-cooled battery pack, comprising a battery pack (1) and a top liquid-cooling plate (9) arranged at the top of the battery pack (1) and a bottom liquid-cooling plate (6) arranged at the bottom of the battery pack (1), characterized in that, The bottom liquid cooling plate (6) extends horizontally to the outside of the battery pack (1) housing (7) and is welded with a three-way valve (5). A wall-penetrating connector (11) is installed on the battery pack (1) housing (7) from the inside to the outside. One end of the wall-penetrating connector (11) is connected to the top liquid cooling plate (9) through an internal pipe (10), and the other end is located on the outside of the battery pack (1) housing (7) and connected to a wall-penetrating quick connector (2). An external pipe (3) is connected to the wall-penetrating quick connector (2), and the other end of the external pipe (3) is connected to the three-way valve (5) through a three-way quick connector (4).

2. The optimized layout structure of the thermal management pipeline for the top and bottom liquid-cooled battery pack according to claim 1, characterized in that, The through-wall connector (11) includes an installation component (11.1), a connector body (11.3) is connected to the installation component (11.1), a sealing ring (11.4) is fitted on the connector body (11.3), and a threaded hole (11.2) is provided on the same side as the connector body (11.3) on the installation component (11.1).

3. The optimized layout structure of the thermal management pipeline for the top and bottom liquid-cooled battery pack according to claim 2, characterized in that, The threaded hole (11.2) is a non-penetrating hole. The threaded hole (11.2) is used with the bolt (8) to fix the through-wall connector (11) and compress the sealing ring (11.4) to fit the inner side of the battery pack (1) box (7).

4. The optimized layout structure of the thermal management pipeline for the top and bottom liquid-cooled battery pack according to claim 1, characterized in that, The three-way valve (5) includes a main body (5.1), on which are connected battery pack water nozzle (5.3), bottom liquid cooling plate interface (5.4), and top liquid cooling plate interface (5.2). The bottom liquid cooling plate interface (5.4) is welded to the bottom liquid cooling plate (6), and the top liquid cooling plate interface (5.2) is connected to the external pipeline (3) through a three-way quick connector (4).

5. The optimized layout structure of the thermal management pipeline for the top and bottom liquid-cooled battery pack according to claim 1, characterized in that, The internal pipes (10) are connected to the top liquid cooling plate (9) and the wall-penetrating joint (11) by thermal expansion connection. The external pipes (3) are connected to the wall-penetrating quick-connect joint (2) and the tee quick-connect joint (4) by thermal expansion connection.

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