Composite liquid cooling plate for battery pack

Abstract

The utility model relates to the technical field of liquid cooling plates, in particular to a battery pack composite liquid cooling plate which comprises a liquid cooling plate body, an auxiliary heat dissipation assembly is assembled on the top of the liquid cooling plate body, and a first heat dissipation frame and a second heat dissipation frame which are perpendicularly crossed are arranged on the auxiliary heat dissipation assembly. Cooling cavities are reserved in the first heat dissipation frame and the second heat dissipation frame correspondingly, a vortex-shaped cooling channel is formed in the center of the interior of the liquid cooling plate body, and an output cooling channel and an input cooling channel are further formed in the two sides of the interior of the liquid cooling plate body correspondingly. A guide cylinder extending into the auxiliary heat dissipation assembly is fixed to the middle position in the vortex-shaped cooling channel. According to the composite liquid cooling plate for the battery pack, the contact duration and the contact area of cooling liquid at the middle part of the battery pack can be increased, and the whole battery pack can be better cooled, so that the effect of prolonging the performance reduction of the battery pack is achieved, and the problems of insufficient endurance travel and limited charging of a new energy automobile can be solved.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling plate technology, specifically a composite liquid cooling plate for battery packs. Background Technology

[0002] The battery is the most critical component in an electric vehicle. Its performance significantly impacts the vehicle's driving capability and energy efficiency, and battery performance is highly sensitive to temperature. Excessive heat not only causes rapid degradation of battery life but, in more serious cases, can also lead to safety issues, resulting in loss of life and property. Therefore, to maximize the performance of the power battery and extend its lifespan, thermal management is essential to ensure that the heat generated by the battery is dissipated effectively and promptly, thus keeping the battery operating within an appropriate temperature range.

[0003] Existing power batteries often use liquid cooling for heat dissipation and temperature reduction. The liquid cooling plate is placed at the bottom of the battery module, allowing coolant to flow through the inside of the liquid cooling plate to remove the heat generated inside the battery in a timely manner. For example, the existing publication number CN221708788U discloses a liquid cooling plate for a new energy vehicle battery pack, which ensures good uniformity of condensate dispersion inside the liquid cooling plate, improves the contact heat exchange effect of the liquid cooling plate, and has good practicality. However, there are some shortcomings. When multiple battery packs are in a tightly fitted state, the temperature of the battery pack near the center is higher, while the temperature near the periphery is relatively lower. Due to external transportation, the coolant flow rate in the cooling channel is relatively fast, causing the inner and outer battery packs to be cooled for the same amount of time. At this time, the battery pack in the middle position does not receive sufficient cooling, and over time, the performance of the battery pack in the middle will decline, resulting in insufficient driving range and limited charging of electric vehicles.

[0004] Therefore, to address the problem of insufficient cooling in the central region of the battery pack, a composite liquid cooling plate for the battery pack is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a composite liquid cooling plate for battery packs, in order to solve the problem mentioned in the background art that the cooling of the central area of ​​the battery pack in the current market is not fast enough, resulting in insufficient driving range and limited charging of electric vehicles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a battery pack composite liquid cooling plate, comprising a liquid cooling plate body, an auxiliary heat dissipation component mounted on the top of the liquid cooling plate body, and a first heat dissipation frame and a second heat dissipation frame perpendicularly intersecting each other on the auxiliary heat dissipation component, with cooling chambers reserved in the first heat dissipation frame and the second heat dissipation frame respectively; a vortex cooling channel is provided in the center of the liquid cooling plate body, and an output cooling channel and an input cooling channel are provided on both sides of the liquid cooling plate body respectively; a guide cylinder extending into the auxiliary heat dissipation component is fixed in the center of the vortex cooling channel, and an output notch communicating with the auxiliary heat dissipation component is evenly spaced on the curved outer wall of the guide cylinder; a foldback cooling channel is connected between the input cooling channel and the vortex cooling channel, and a longitudinal cooling channel is provided at the end of the output cooling channel.

[0007] Preferably, the top of the liquid cooling plate body is equipped with a thermally conductive silicone pad, and a groove is reserved at the contact position between the thermally conductive silicone pad and the auxiliary heat dissipation component.

[0008] Preferably, an input connector pipe and an output connector pipe are symmetrically inserted at the end of the liquid cooling plate body, and the input connector pipe and the output connector pipe are respectively connected to the input cooling channel and the output cooling channel.

[0009] Preferably, three sets of baffles are fixed laterally offset within the cooling cavity, and the baffles form a reversing channel. The cross-sectional dimension of the channel formed by the baffles and the cooling cavity is smaller than the cooling channel dimension within the liquid cooling plate body.

[0010] Preferably, the bottom end of the first heat dissipation frame is provided with a guide pipe that communicates with the longitudinal cooling channel, and the bottom end of the second heat dissipation frame is provided with a guide pipe that communicates with the output cooling channel. The inner diameter of the guide pipe is smaller than the channel size formed by the baffle and the cooling cavity.

[0011] Preferably, a guide hole communicating with the second heat sink frame is provided at the upper part near the middle of the cooling cavity, and a guide hole communicating with the first heat sink frame is provided at equal intervals near the top of the second heat sink frame.

[0012] Preferably, the bottom of the guide cylinder is an open structure, and the bottom of the curved outer wall of the guide cylinder is provided with input notches at uniform intervals, and the input notches are connected to the vortex cooling channel.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: the composite liquid cooling plate for the battery pack can increase the contact time and area of ​​the coolant in the central part of the battery pack, thereby achieving better cooling of the entire battery pack and extending the period of performance degradation. This can alleviate the problems of insufficient driving range and limited charging in new energy vehicles. The composite liquid cooling plate utilizes a vortex cooling channel to extend the flow path of the coolant entering the liquid cooling plate, and prolong the cooling time of the central battery pack. This ensures that the central battery pack receives sufficient cooling and heat dissipation. Simultaneously, the coolant flows upward through the guide cylinder until it enters the auxiliary heat dissipation component and spreads outwards, allowing for cooling and circulation around the central battery pack. This further increases the contact area between the coolant and the central battery pack, resulting in better heat dissipation for the central battery pack. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a composite liquid cooling plate structure for a battery pack according to the present invention;

[0015] Figure 2 This is a schematic diagram of the assembly structure of a composite liquid cooling plate for a battery pack according to the present invention.

[0016] Figure 3 This is a schematic diagram of the internal structure of a composite liquid cooling plate for a battery pack according to the present invention.

[0017] Figure 4 This is a schematic diagram of the internal cooling channel structure of a composite liquid cooling plate for a battery pack according to this utility model;

[0018] Figure 5 This is a schematic diagram of the guide cylinder structure of a composite liquid cooling plate for a battery pack according to this utility model;

[0019] Figure 6 This is a schematic diagram of the internal structure of the second heat dissipation frame of a battery pack composite liquid cooling plate according to the present invention.

[0020] Figure 7 This is a schematic diagram of the internal structure of the first heat dissipation frame of a battery pack composite liquid cooling plate according to the present invention.

[0021] In the diagram: 1. Liquid cooling plate body; 101. Output cooling channel; 102. Longitudinal cooling channel; 103. Input cooling channel; 104. Vortex cooling channel; 105. Reverse cooling channel; 2. Input connector pipe; 3. Output connector pipe; 4. Auxiliary heat dissipation assembly; 401. First heat dissipation frame; 402. Second heat dissipation frame; 403. Guide hole; 404. Baffle; 405. Cooling cavity; 406. Guide pipe; 5. Thermally conductive silicone pad; 6. Guide cylinder; 601. Output notch; 602. Input notch. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-7This utility model provides a technical solution: a battery pack composite liquid cooling plate, including a liquid cooling plate body 1, an auxiliary heat dissipation component 4 mounted on the top of the liquid cooling plate body 1, and a first heat dissipation frame 401 and a second heat dissipation frame 402 that are perpendicularly intersecting each other on the auxiliary heat dissipation component 4. A thermally conductive silicone pad 5 is mounted on the top of the liquid cooling plate body 1, and a notch is reserved at the contact position between the thermally conductive silicone pad 5 and the auxiliary heat dissipation component 4. This structure utilizes the thermal conductivity of the thermally conductive silicone pad 5 to uniformly and constantly transfer the heat generated by the battery pack to the liquid cooling plate body 1. The thermally conductive silicone pad 5 can avoid the auxiliary heat dissipation component 4 through the notch. Cooling chambers 405 are reserved in the first heat dissipation frame 401 and the second heat dissipation frame 402 respectively, and the cooling chambers 405 are laterally staggered. Three sets of baffles 404 are fixed, and the baffles 404 form a reversal channel. The cross-sectional dimension of the channel formed by the baffles 404 and the cooling cavity 405 is smaller than the size of the cooling channel in the liquid cooling plate body 1. This structure allows the coolant in the cooling cavity 405 to flow back and forth in an S-shape, which can better absorb heat and cool the battery pack from all sides until the coolant flows back into the liquid cooling plate body 1. A guide hole 403 is opened at the upper part near the middle of the cooling cavity 405, which is connected to the second heat sink 402. A guide hole 403 is also opened at equal intervals near the top of the second heat sink 402, which is connected to the first heat sink 401. This structure allows the second heat sink 402 and the first heat sink 401 to achieve a cooling cavity through the guide hole 403. The connection of 405 allows the coolant to flow between the second heat sink 402 and the first heat sink 401. A vortex-shaped cooling channel 104 is centrally located inside the liquid cooling plate body 1, and output cooling channels 101 and input cooling channels 103 are respectively located on both sides of the liquid cooling plate body 1. A guide cylinder 6 extending into the auxiliary heat sink assembly 4 is fixed centrally within the vortex-shaped cooling channel 104, and output notches 601 communicating with the auxiliary heat sink assembly 4 are evenly spaced on the curved outer wall of the guide cylinder 6. A guide hole 403 communicating with the second heat sink 402 is located near the center of the upper part of the cooling cavity 405, and guide holes 401 communicating with the first heat sink 401 are equidistantly located near the top of the second heat sink 402. 3. This structure allows the second heat sink 402 and the first heat sink 401 to be connected via the guide hole 403 to the cooling chamber 405, thereby enabling the coolant to circulate within the second heat sink 402 and the first heat sink 401. A zigzag cooling channel 105 connects the input cooling channel 103 and the vortex cooling channel 104, and a longitudinal cooling channel 102 is provided at the end of the output cooling channel 101. Input connector pipes 2 and output connector pipes 3 are symmetrically inserted into the end of the liquid cooling plate body 1, and are respectively connected to the input cooling channel 103 and the output cooling channel 101. This structure allows the input connector pipes 2 and 3 to be used for coolant input and output, respectively, achieving coolant circulation.The bottom end of the first heat sink 401 is provided with a guide pipe 406 connected to the longitudinal cooling channel 102, and the bottom end of the second heat sink 402 is provided with a guide pipe 406 connected to the output cooling channel 101. The inner diameter of the guide pipe 406 is smaller than the channel size formed by the baffle 404 and the cooling chamber 405. This structure allows the coolant in the first heat sink 401 and the second heat sink 402 to flow to the longitudinal cooling channel 102 and the output cooling channel 101, respectively, through the guide pipe 406. Simultaneously, due to the small size of the guide pipe 406, the coolant can fill the cooling chamber 405 under pressure, ensuring sufficient heat absorption and cooling area and time for the battery pack by the first heat sink 401 and the second heat sink 402. This extends the battery pack's performance and alleviates the problems of insufficient driving range and limited charging for new energy vehicles.

[0024] Working Principle: When using this battery pack composite liquid cooling plate, the coolant first circulates within the liquid cooling plate body 1 through the input connector pipe 2 and the output connector pipe 3. The coolant entering the liquid cooling plate body 1 flows along the input cooling channel 103 and enters the return cooling channel 105, where it absorbs heat and cools the battery pack located at the top of the liquid cooling plate body 1. Next, the coolant enters the vortex cooling channel 104, which causes the coolant to flow in a vortex shape, extending the flow path in the middle of the coolant and prolonging the cooling time in the middle of the battery pack. Since coolant is continuously supplied to the liquid cooling plate body 1 from the outside and generates a certain pressure, the coolant in the vortex cooling channel 104 enters the guide cylinder 6 through the input notch 602. Under pressure, the coolant surges upwards through the output notch 601 into the auxiliary heat dissipation assembly 4. The coolant first enters the centrally located cooling chamber 405 from component 4, flows along the baffle 404 in a zigzag pattern within the cooling chamber 405, and then flows through the guide hole 403 to the surrounding first heat sink 401 and second heat sink 402. This increases the contact area between the coolant and the battery pack in the center, achieving a better cooling effect. Since the inner diameter of the guide pipe 406 is smaller than the channel formed by the baffle 404 and the cooling chamber 405, the coolant will fill the cooling chamber 405, ensuring sufficient heat absorption and cooling area and time for the first heat sink 401 and second heat sink 402. Finally, the coolant will flow back through the guide pipe 406 to the longitudinal cooling channel 102 and the output cooling channel 101 within the liquid cooling plate body 1, and finally exit the liquid cooling plate body 1 to cool the battery pack. The thermally conductive silicone pad 5 is used to assist in the thermal conductivity treatment of the liquid cooling plate body 1, thus completing a series of tasks.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite liquid cooling plate for a battery pack, comprising a liquid cooling plate body (1), characterized in that: The liquid cooling plate body (1) is equipped with an auxiliary heat dissipation assembly (4) on its top. The auxiliary heat dissipation assembly (4) is provided with a first heat dissipation frame (401) and a second heat dissipation frame (402) that are perpendicular to each other. Cooling chambers (405) are reserved in the first heat dissipation frame (401) and the second heat dissipation frame (402). A vortex cooling channel (104) is opened in the center of the liquid cooling plate body (1). Output cooling channels (101) are also opened on both sides of the liquid cooling plate body (1). The input cooling channel (103) is provided with a guide cylinder (6) that extends into the auxiliary heat dissipation component (4) and is fixed in the center of the vortex cooling channel (104). The outer wall of the curved surface of the guide cylinder (6) is provided with an output notch (601) that communicates with the auxiliary heat dissipation component (4) at even intervals. A foldback cooling channel (105) is connected between the input cooling channel (103) and the vortex cooling channel (104). A longitudinal cooling channel (102) is provided at the end of the output cooling channel (101).

2. The battery pack composite liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate body (1) is equipped with a thermally conductive silicone pad (5) on the top, and a notch is reserved at the contact position between the thermally conductive silicone pad (5) and the auxiliary heat dissipation component (4).

3. The battery pack composite liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate body (1) has an input connector pipe (2) and an output connector pipe (3) symmetrically inserted at its end, and the input connector pipe (2) and the output connector pipe (3) are respectively connected to the input cooling channel (103) and the output cooling channel (101).

4. The battery pack composite liquid cooling plate according to claim 1, characterized in that: Three sets of baffles (404) are fixed laterally offset inside the cooling cavity (405), and the baffles (404) form a folding channel. The cross-sectional dimension of the channel formed by the baffles (404) and the cooling cavity (405) is smaller than the cooling channel dimension inside the liquid cooling plate body (1).

5. A composite liquid cooling plate for a battery pack according to claim 4, characterized in that: The bottom end of the first heat dissipation frame (401) is provided with a guide pipe (406) that is connected to the longitudinal cooling channel (102), and the bottom end of the second heat dissipation frame (402) is provided with a guide pipe (406) that is connected to the output cooling channel (101). The inner diameter of the guide pipe (406) is smaller than the channel size formed by the baffle (404) and the cooling cavity (405).

6. A composite liquid cooling plate for a battery pack according to claim 1, characterized in that: The cooling chamber (405) has a guide hole (403) connected to the second heat sink frame (402) at the upper part near the middle, and the second heat sink frame (402) has guide holes (403) connected to the first heat sink frame (401) at equal intervals near the top.

7. A composite liquid cooling plate for a battery pack according to claim 1, characterized in that: The bottom of the guide cylinder (6) is open, and the bottom of the curved outer wall of the guide cylinder (6) is provided with input notches (602) at even intervals, and the input notches (602) are connected to the vortex cooling channel (104).

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