Battery box liquid cooling plate and use method thereof

Abstract

The invention discloses a battery box liquid cooling plate and a use method thereof, the battery box liquid cooling plate comprises an upper layer plate and a lower layer plate, and the upper layer plate and the lower layer plate are attached to form a liquid cooling plate body; a series of main runners are arranged in the liquid cooling plate body; the water inlet is formed in the liquid cooling plate body, and the water inlet is communicated with the first end of the main flow channel; the water outlet is formed in the liquid cooling plate body, and the water outlet is communicated with the second end of the main flow channel. The flow channels are designed in parallel, the flow channel path is short, the cooling medium circulation is fast, and the heat generated by the battery cell can be fast brought to the outside of the electric box.

Description

Technical Field

[0001] The present invention belongs to the technical field of power batteries, and in particular relates to a battery box liquid cooling plate and a use method thereof. Background Art

[0002] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:

[0003] In traditional technology, the liquid cooling plate of the power battery has a long flow channel, a complex structure, slow circulation of the cooling medium, and poor cooling effect.

[0004] CN109818112B-A working method of a power battery liquid cooling plate with reversible flow direction, discloses a power battery liquid cooling plate with reversible flow direction, including a cooling substrate attached to the edge of the surface of the power battery, a pipeline assembly arranged on the cooling substrate, a first four-way reversing solenoid valve and a second four-way reversing solenoid valve connected between the cooling substrate and the pipeline assembly, used to change the flow direction of the liquid, and matched with each other, a first connector with one end connected to the first four-way reversing solenoid valve and the other end inserted into the cooling substrate, and one end connected to the second four-way reversing solenoid valve, which also cannot solve the above-mentioned technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a battery box liquid cooling plate and a method of using the same. The flow channels are designed in parallel, the flow channel path is short, and the cooling medium circulates quickly, so that the heat generated by the battery cells can be quickly brought to the outside of the battery box.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a battery box liquid cooling plate, having:

[0007] An upper plate and a lower plate, wherein the upper plate and the lower plate are bonded together to form a liquid cooling plate body;

[0008] Main flow channel, a series of main flow channels are arranged in the liquid cooling plate body;

[0009] A water inlet is provided on the liquid cooling plate body, and the water inlet is connected to the first end of the main flow channel;

[0010] A water outlet is arranged on the liquid cooling plate body, and the water outlet is connected to the second end of the main flow channel.

[0011] A series of main channels are evenly distributed in the liquid cooling plate body; the main channels extend from a first end to a second end of the liquid cooling plate body.

[0012] A water inlet dispersion channel is also provided on the first end of the liquid cooling plate body, and the water inlet dispersion channel is connected to the first end of a series of main channels; the water inlet is connected to the water inlet dispersion channel.

[0013] A confluence channel is also provided on the second end of the liquid cooling plate body, and the confluence channel is connected to the second ends of a series of main channels; the water outlet is connected to the confluence channel.

[0014] A water outlet channel is also provided, a first end of the water outlet channel is connected to the confluence channel; and the water outlet is connected to the second end of the water outlet channel.

[0015] The width of the water outlet channel is greater than the width of the main channel.

[0016] The lower plate is provided with a series of outer convex layers and inner concave layers; a gap is formed between the outer convex layer and the upper plate, and the gap constitutes a flow channel; the inner concave layer is welded to the upper plate.

[0017] The upper plate is a flat plate; a positioning column adapted to the battery box is arranged on the upper plate.

[0018] A series of reinforcement grooves are also provided on the second end of the liquid cooling plate body; and a series of reinforcement welding points are provided on both ends of the liquid cooling plate body.

[0019] The method of using the above-mentioned battery box liquid cooling plate is that the battery cells are placed on the upper plate of the liquid cooling plate body, a series of main channels are arranged in parallel, and the coolant flows from the first end to the second end of the series of main channels at the same time, and then flows out through the water outlet.

[0020] One of the above technical solutions has the following advantages or beneficial effects: the flow channel is designed in parallel, the flow channel path is short, and the cooling medium circulates quickly, which can quickly bring the heat generated by the battery cell to the outside of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the battery box liquid cooling plate provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of a battery box liquid cooling plate;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of a battery box liquid cooling plate;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of a battery box liquid cooling plate;

[0025] Figure 5 for Figure 1 A schematic diagram of the structure of a battery box liquid cooling plate;

[0026] The markings in the above figures are: 21, upper plate, 22, lower plate, 221, outer convex layer, 222, inner concave layer, 23, water inlet, 24, water inlet dispersion channel, 25, main channel, 26, confluence channel, 27, water outlet channel, 28, water outlet, 29, reinforcement groove, 210, positioning column. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 5 A battery box liquid cooling plate comprises: an upper plate 21 and a lower plate 22, which are bonded together to form a liquid cooling plate body; a main flow channel 25, a series of main flow channels 25 are arranged in the liquid cooling plate body; a water inlet 23, which is arranged on the liquid cooling plate body and is connected to the first end of the main flow channel 25; a water outlet 28, which is arranged on the liquid cooling plate body and is connected to the second end of the main flow channel 25. The flow channel is designed in parallel, with a short flow channel path and fast cooling medium circulation, and the heat generated by the battery cell can be quickly brought to the outside of the battery box.

[0029] A series of main channels 25 are evenly distributed in the liquid cooling plate body; the main channels 25 extend from the first end to the second end of the liquid cooling plate body. The channels are designed in parallel, with short channel paths and fast cooling medium circulation, which can quickly bring the heat generated by the battery cells to the outside of the electric box. By connecting multiple channels in parallel, the temperature distribution at different positions of the liquid cooling channel can be balanced, thereby reducing the temperature difference at different positions of the channel.

[0030] A water inlet dispersion channel 24 is also provided on the first end of the liquid cooling plate body, and the water inlet dispersion channel 24 is connected to the first end of a series of main channels 25; the water inlet 23 is connected to the water inlet dispersion channel 24. The water inlet dispersion channel 24 plays a role in diverting the liquid in the water inlet 23 to each main channel 25.

[0031] A confluence channel 26 is also provided on the second end of the liquid cooling plate body, and the confluence channel 26 is connected to the second ends of a series of main channels 25; and the water outlet 28 is connected to the confluence channel 26. The confluence channel 26 collects the liquid at the second ends of the main channels 25, and the collected liquid is discharged through the water outlet 28.

[0032] A water outlet channel 27 is also provided, a first end of which is connected to the confluence channel 26 ; and a water outlet 28 is connected to a second end of the water outlet channel 27 .

[0033] The width of the outlet channel 27 is greater than the width of the main channel 25. In order to control the distribution of channel temperature, the width of the outlet channel 28 is designed to be wider than the width of the inlet channel 23. Because the initial temperature of the coolant inlet 23 is low, as the coolant gradually circulates and heats up, the coolant temperature at the outlet 28 increases.

[0034] The lower plate 22 is provided with a series of convex layers 221 and concave layers 222; a gap is formed between the convex layer 221 and the upper plate 21, and the gap constitutes a flow channel; the concave layer 222 is welded to the upper plate 21. The upper plate 21 is a flat plate; it adopts a double-layer design, with the upper layer being a flat surface and the lower layer being a molded surface. The battery cell is placed above the upper plane of the liquid cooling plate, and the flat surface can increase the contact area between the liquid cooling plate and the bottom of the battery cell to improve the heat dissipation efficiency; the lower layer of the liquid cooling plate is an uneven molded structure, and a flow channel is formed between the convex position and the upper plane, and the concave position of the liquid cooling plate is welded to the upper plane to improve the structural strength.

[0035] The upper plate 21 is provided with a positioning column 210 adapted to the battery box body, which plays a role in positioning the liquid cooling plate on the box body.

[0036] A series of reinforcement grooves 29 are also provided on the second end of the liquid cooling plate body; a series of reinforcement welding points are provided on both ends of the liquid cooling plate body, which play a role in increasing the strength of the liquid cooling plate.

[0037] In the method of using the above-mentioned battery box liquid cooling plate, the battery cells are placed on the upper plate 21 of the liquid cooling plate body, a series of main channels 25 are arranged in parallel, and the coolant flows from the first end to the second end of the series of main channels 25 at the same time, and then flows out through the water outlet 28.

[0038] After adopting the above structure, the flow channel is designed in parallel, the flow channel path is short, and the cooling medium circulates quickly, which can quickly bring the heat generated by the battery cell to the outside of the battery box.

[0039] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery box liquid cooling plate, characterized in that: have: An upper plate and a lower plate, wherein the upper plate and the lower plate are bonded together to form a liquid cooling plate body; Main flow channel, a series of main flow channels are arranged in the liquid cooling plate body; A water inlet is provided on the liquid cooling plate body, and the water inlet is connected to the first end of the main flow channel; A water outlet is arranged on the liquid cooling plate body, and the water outlet is connected to the second end of the main flow channel.

2. The battery box liquid cooling plate according to claim 1, characterized in that: A series of main channels are evenly distributed in the liquid cooling plate body; the main channels extend from a first end to a second end of the liquid cooling plate body.

3. The battery box liquid cooling plate according to claim 2, characterized in that: A water inlet dispersion channel is also provided on the first end of the liquid cooling plate body, and the water inlet dispersion channel is connected to the first end of a series of main channels; the water inlet is connected to the water inlet dispersion channel.

4. The battery box liquid cooling plate according to claim 3, characterized in that: A confluence channel is also provided on the second end of the liquid cooling plate body, and the confluence channel is connected to the second ends of a series of main channels; the water outlet is connected to the confluence channel.

5. The battery box liquid cooling plate according to claim 4, characterized in that: A water outlet channel is also provided, a first end of the water outlet channel is connected to the confluence channel; and the water outlet is connected to the second end of the water outlet channel.

6. The battery box liquid cooling plate according to claim 5, characterized in that: The width of the water outlet channel is greater than the width of the main channel.

7. The battery box liquid cooling plate according to claim 6, characterized in that: The lower plate is provided with a series of outer convex layers and inner concave layers; a gap is formed between the outer convex layer and the upper plate, and the gap constitutes a flow channel; the inner concave layer is welded to the upper plate.

8. The battery box liquid cooling plate according to claim 7, characterized in that: The upper plate is a flat plate; a positioning column adapted to the battery box is arranged on the upper plate.

9. The battery box liquid cooling plate according to claim 8, characterized in that: A series of reinforcement grooves are also provided on the second end of the liquid cooling plate body; and a series of reinforcement welding points are provided on both ends of the liquid cooling plate body.

10. The method for using the battery box liquid cooling plate according to any one of claims 1 to 9, characterized in that: The battery cells are placed on the upper plate of the liquid cooling plate body, and a series of main channels are arranged in parallel. The coolant flows from the first end to the second end of the series of main channels at the same time, and then flows out through the water outlet.

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