Dynamic immersed cooling battery pack structure

Abstract

The utility model discloses a dynamic immersion type cooling battery pack structure which comprises a battery box groove shell and a dry and wet partition plate, and the dry and wet partition plate is fixed in a box groove of the battery box groove shell and divides the box groove into a wiring harness bin and an immersion battery bin. The immersion battery bin forms a cooling liquid flow channel through a plurality of flow channel resistance reduction limiting partition plates which are alternately arranged on the cavity walls of the two sides, a battery cell is installed in the cooling liquid flow channel, a BMS battery management module is installed in the wiring harness bin, a plurality of connector holes are formed in a plate body of the dry-wet partition plate, wiring harness sealing connectors are installed in the connector holes, and the wiring harness sealing connectors are connected with the battery cell. A liquid discharge three-way switching valve pipe and a liquid inlet three-way switching valve pipe are arranged in the wiring harness bin, and two inlet end pipe orifices of the liquid discharge three-way switching valve pipe and two discharge end pipe orifices of the liquid inlet three-way switching valve pipe extend to the immersion battery bin. The cooling device has the beneficial effects of high cooling efficiency, uniform temperature distribution, simplified structure, reduced installation and maintenance cost and strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of battery packs, and in particular to a dynamic immersion cooling battery pack structure. Background Technology

[0002] With the rapid development of electric vehicles and energy storage systems, the thermal management of battery packs has become a key factor restricting their performance and lifespan. Existing battery pack cooling technologies mainly include the following:

[0003] Air cooling is low in cost, but its heat dissipation effect is poor and it is difficult to meet the cooling requirements of high power density batteries.

[0004] Liquid cooling plates dissipate heat through contact between the liquid cooling plate and the battery, but this only achieves localized cooling and has limited cooling efficiency.

[0005] Static immersion cooling involves immersing the battery in an insulating liquid and using the liquid's heat capacity for heat dissipation. However, the liquid has poor fluidity, resulting in uneven cooling and a lack of active cooling mechanisms.

[0006] However, air cooling has an uneven cooling effect, which can easily lead to uneven battery temperature distribution. Liquid cooling plate cooling lacks an efficient active cooling mechanism and cannot meet the heat dissipation requirements of high power density batteries. For static immersion cooling, its liquid has poor fluidity and cannot achieve rapid heat transfer between battery packs. Utility Model Content

[0007] The purpose of this invention is to provide a dynamic immersion cooling battery pack structure to solve the above-mentioned problems.

[0008] This utility model achieves the above objectives through the following technical solutions:

[0009] A dynamic immersion-cooled battery pack structure includes a battery box shell and a wet / dry partition. The wet / dry partition is fixed inside the battery box shell and divides the box shell into a wiring harness compartment and an immersion battery compartment. The immersion battery compartment forms a coolant flow channel through several alternately arranged flow channel resistance-reducing and limiting partitions on both sides of the cavity wall. Battery cells are installed in the coolant flow channel. A BMS battery management module is installed in the wiring harness compartment. The wet / dry partition has several connector holes, and wiring harness sealing connectors are installed in the connector holes. The wiring harness compartment has a drain three-way switching valve and an inlet three-way switching valve. The two inlet ports of the drain three-way switching valve and the two drain ports of the inlet three-way switching valve both extend into the immersion battery compartment.

[0010] Furthermore, the flow channel drag-reducing limiting baffle is composed of a heat-conducting baffle body and several drag-reducing grooves disposed on both sides of the heat-conducting baffle body.

[0011] Furthermore, the wet and dry partition has two return holes on both sides of the top of the plate, and the two inlet ports of the drain three-way switching valve extend into the submerged battery compartment through the return holes. The wet and dry partition has two inlet holes on both sides of the bottom of the plate, and the two outlet ports of the drain three-way switching valve extend into the submerged battery compartment through the inlet holes.

[0012] Furthermore, the drain end of the drain three-way switching valve extends to the outside of the battery box housing and is equipped with a drain pipe connector, and the inlet end of the inlet of the inlet three-way switching valve extends to the outside of the battery box housing and is equipped with an inlet pipe connector.

[0013] Furthermore, the outer wall of the wire harness compartment is provided with an inspection hole, an inspection side cover is installed on the inspection hole, an explosion-proof valve is installed on the inspection side cover, and an MSD protective device is also installed on the outer wall of the wire harness compartment.

[0014] Furthermore, a cell connection bar is installed on the cell, and the cell connection bar is connected to the wire harness sealing connector via a wire harness. The wire harness sealing connector is connected to the BMS battery management module via a wire harness.

[0015] Furthermore, the upper edge of the battery box housing and the wet / dry partition is provided with a plurality of mounting holes, and a sealing gasket is installed on the upper edge of the battery box housing and the wet / dry partition.

[0016] Furthermore, both the drain three-way switching valve pipe and the inlet three-way switching valve pipe are composed of a three-way valve and valve port pipes respectively installed on the three valve ports of the three-way valve.

[0017] The beneficial effects are: high cooling efficiency, which significantly improves heat dissipation efficiency through liquid flow and the active cooling mechanism of the liquid chiller unit;

[0018] The temperature distribution is uniform, and the liquid circulates between the battery packs in conjunction with the valve body switching between countercurrent and alternating flow to ensure rapid heat transfer and avoid local overheating;

[0019] The structure is simplified, and the immersion design reduces complex piping and heat dissipation components, thereby lowering installation and maintenance costs;

[0020] It is highly adaptable and suitable for the thermal management needs of high power density batteries, thereby improving the safety and reliability of battery systems. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the dynamic immersion cooling battery pack structure described in this utility model;

[0022] Figure 2 This is a diagram showing the internal structure of the wiring harness compartment of the dynamic immersion cooling battery pack structure described in this utility model;

[0023] Figure 3 This is a schematic diagram of the flow channel resistance reduction and limiting partition of the dynamic immersion cooling battery pack structure described in this utility model;

[0024] Figure 4 This is a schematic diagram of the three-way switching valve pipe of the dynamic immersion cooling battery pack structure described in this utility model.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Battery box housing; 2. Dry and wet separator; 3. Wiring harness compartment; 4. Immersed battery compartment; 5. Flow channel resistance reduction and limiting separator; 51. Thermal conductive separator body; 52. Resistance reduction groove; 6. Drainage three-way switching valve pipe; 61. Three-way valve; 62. Valve port pipe; 7. Inlet three-way switching valve pipe; 8. BMS battery management module; 9. Wiring harness sealing connector; 10. Battery cell; 11. Battery cell connection bar; 12. Sealing gasket; 13. Pipe connector; 14. Inlet pipe connector; 15. Inspection side cover; 16. MSD protective component; 17. Explosion-proof valve. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] like Figures 1-4 As shown, a dynamic immersion cooling battery pack structure includes a battery box shell 1 and a dry / wet separator 2.

[0029] The dry and wet partition 2 is fixed inside the battery box shell 1 and divides the box into a wire harness compartment 3 and an immersed battery compartment 4. The wire harness compartment 3 is a dry area, mainly used to store control components and wire harnesses. The immersed battery compartment 4 is a wet area, which is cooled by circulating coolant. The battery box shell 1 and the dry and wet partition 2 are aluminum profile frames, which have good protective and heat dissipation performance.

[0030] The submerged battery compartment 4 forms a coolant flow channel through several alternating flow channel resistance-reducing and limiting baffles 5 on both sides of the cavity wall. The coolant flows in the coolant flow channel, thereby reducing the temperature of the battery cell 10 and carrying away the heat generated by the battery cell 10 during use. The battery cell 10 is installed in the coolant flow channel.

[0031] The wiring harness compartment 3 is equipped with a BMS battery management module 8, which is an essential component of current battery packs and will not be described in detail here. The dry and wet separator 2 has several connector holes, and a wiring harness sealing connector 9 is installed in the connector holes. The wiring harness sealing connector 9 is an intermediate component for communication between the battery cell 10 and the BMS battery management module 8. It is waterproof to prevent liquid from seeping into the wiring harness compartment 3.

[0032] The wiring harness compartment 3 is equipped with a drain three-way switching valve pipe 6 and an inlet three-way switching valve pipe 7. The drain three-way switching valve pipe 6 has a two-inlet and one-outlet structure, with two inlet pipes and one outlet pipe. The inlet three-way switching valve pipe 7 has a one-inlet and two-outlet structure. Both the two inlet pipes of the drain three-way switching valve pipe 6 and the two outlet pipes of the inlet three-way switching valve pipe 7 extend to the submerged battery compartment 4 to realize the flow of coolant in the coolant channel and the conversion of the flow direction.

[0033] like Figures 1-4 As shown, this utility model also discloses the following more optimized specific structures:

[0034] The flow channel resistance reduction limiting baffle 5 consists of a heat-conducting baffle body 51 and several resistance reduction grooves 52 arranged on both sides of the heat-conducting baffle body 51. When the coolant flows, due to the small gap between the flow channel resistance reduction limiting baffle 5 and the battery cell 10, the flow resistance of the coolant is reduced by the resistance reduction grooves 52, and part of the coolant flows through the resistance reduction grooves 52.

[0035] The wet and dry partition 2 has two return holes on both sides of the top of the plate. The two inlet ports of the drain three-way switching valve pipe 6 extend into the immersed battery compartment 4 through the return holes. The wet and dry partition 2 has two inlet holes on both sides of the bottom of the plate. The two outlet ports of the inlet three-way switching valve pipe 7 extend into the immersed battery compartment 4 through the inlet holes.

[0036] The drain end of the drain three-way switching valve pipe 6 extends to the outside of the battery box housing 1 and is equipped with a drain pipe connector 13. The inlet end of the inlet of the inlet three-way switching valve pipe 7 extends to the outside of the battery box housing 1 and is equipped with an inlet pipe connector 14. The drain pipe connector 13 and the inlet pipe connector 14 are used to connect to the main coolant circulation pipeline, which can simultaneously supply heat dissipation to multiple battery packs.

[0037] The outer wall of the wire harness compartment 3 is provided with an inspection hole, and an inspection side cover 15 is installed on the inspection hole. An explosion-proof valve 17 is installed on the inspection side cover 15. An MSD protective component 16, which is a commonly used protective fuse structure, is also installed on the outer wall of the wire harness compartment 3.

[0038] A cell connection bar 11 is installed on the cell 10. The cell connection bar 11 is connected to the wire harness sealing connector 14 through a wire harness. The wire harness sealing connector 14 is connected to the BMS battery management module 8 through a wire harness.

[0039] The upper edge of the battery box housing 1 and the dry and wet partition 2 is provided with several mounting holes for mounting the cover. A sealing gasket 12 is installed on the upper edge of the battery box housing 1 and the dry and wet partition 2 to further improve the sealing performance of the battery pack. The sealing gasket 12 adopts an IP67 level sealing ring.

[0040] Both the drain three-way switching valve pipe 6 and the inlet three-way switching valve pipe 7 consist of a three-way valve 61 and valve port pipes 62 respectively installed on the three valve ports of the three-way valve 61.

[0041] like Figures 1-4 The dynamic immersion cooling battery pack structure shown mainly dissipates heat from the battery cells 10 in the immersion battery compartment 4 through the coolant. The immersion battery compartment 4 is separated by several alternately arranged flow channel resistance reducing and limiting baffles 5, and the coolant flow channels carry away heat through the flow of coolant.

[0042] The flow direction of the coolant in the coolant channel can be switched. When the coolant flows in the coolant channel, the temperature is low when the coolant first enters the channel. As it absorbs heat from the battery cell, the temperature gradually rises, resulting in a temperature difference between the inlet and outlet ends of the coolant in the coolant channel. The heat dissipation effect at the outlet end is relatively poor. Therefore, a drain three-way switching valve pipe 6 and an inlet three-way switching valve pipe 7 are set up. By switching the valve port of the three-way valve, the flow direction of the coolant in the coolant channel can be changed, so as to achieve uniform heat dissipation of the battery cell at each position.

[0043] The BMS battery management module 8 and the cell connection row 11 are connected by the wire harness sealing connector 9, so that the wire harness compartment 3 and the submerged battery compartment 4 are separated into dry and wet, and the coolant is prevented from siphoning and seeping along the wire harness.

[0044] The thermally conductive baffle body 51 defines the flow path, with coolant flowing in from below and out from above, achieving circulation and better controlling the temperature between the cells.

[0045] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A dynamic immersion cooling battery pack structure, characterized in that: The device includes a battery box housing and a wet / dry partition. The wet / dry partition is fixed inside the battery box housing and divides the housing into a wiring harness compartment and a submerged battery compartment. The submerged battery compartment forms a coolant flow channel through several alternately arranged flow channel resistance-reducing and limiting partitions on both sides of the cavity wall. Battery cells are installed in the coolant flow channel. A BMS battery management module is installed in the wiring harness compartment. The wet / dry partition has several connector holes, and wiring harness sealing connectors are installed in the connector holes. The wiring harness compartment is equipped with a drain three-way switching valve and an inlet three-way switching valve. The two inlet ports of the drain three-way switching valve and the two drain ports of the inlet three-way switching valve both extend to the submerged battery compartment.

2. The dynamic immersion cooling battery pack structure according to claim 1, characterized in that: The flow channel drag-reducing limiting baffle consists of a heat-conducting baffle body and several drag-reducing grooves arranged on both sides of the heat-conducting baffle body.

3. The dynamic immersion cooling battery pack structure according to claim 1, characterized in that: The wet and dry partition has two return holes on both sides of the top of the plate. The two inlet ports of the drain three-way switching valve extend into the submerged battery compartment through the return holes. The wet and dry partition has two inlet holes on both sides of the bottom of the plate. The two outlet ports of the drain three-way switching valve extend into the submerged battery compartment through the inlet holes.

4. The dynamic immersion cooling battery pack structure according to claim 1, characterized in that: The drain end of the drain three-way switching valve extends to the outside of the battery box housing and is equipped with a drain pipe connector. The inlet end of the inlet of the inlet three-way switching valve extends to the outside of the battery box housing and is equipped with an inlet pipe connector.

5. The dynamic immersion cooling battery pack structure according to claim 1, characterized in that: The outer wall of the wire harness compartment is provided with an inspection hole, an inspection side cover is installed on the inspection hole, an explosion-proof valve is installed on the inspection side cover, and an MSD protective device is also installed on the outer wall of the wire harness compartment.

6. The dynamic immersion cooling battery pack structure according to claim 1, characterized in that: The battery cell is equipped with a battery cell connection bar, which is connected to the wire harness sealing connector via a wire harness. The wire harness sealing connector is connected to the BMS battery management module via a wire harness.

7. The dynamic immersion cooling battery pack structure according to claim 1, characterized in that: The upper edge of the battery box shell and the dry / wet partition is provided with a number of mounting holes, and a sealing gasket is installed on the upper edge of the battery box shell and the dry / wet partition.

8. The dynamic immersion cooling battery pack structure according to claim 1, characterized in that: Both the drain three-way switching valve pipe and the inlet three-way switching valve pipe consist of a three-way valve and valve port pipes respectively installed on the three valve ports of the three-way valve.

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