Liquid-cooled battery pack shell

Abstract

The utility model discloses a liquid-cooled battery pack shell. The liquid-cooled battery pack shell comprises a shell, a heat dissipation structure and an assembly structure, by arranging a heat dissipation structure, after a battery is placed in a battery storage cavity, a bottom plate, a top plate and a protection frame are assembled into a whole through an assembling structure, at the moment, the bottom of the battery makes contact with a supporting plate, the side faces of the battery make contact with four limiting columns, and then cooling liquid is injected into a liquid inlet pipe through an external liquid cooling system; cooling liquid firstly enters the first longitudinal liquid inlet groove in the longitudinal liquid inlet channel on the rightmost side, then enters the second longitudinal liquid inlet groove along the U-shaped flow guide groove, then enters the multiple longitudinal liquid inlet channels and the U-shaped flow guide groove one by one along the connecting channel, and is discharged along the liquid discharging pipe to form circulation. When cooling liquid enters the longitudinal liquid inlet channel and the U-shaped flow guide groove, the cooling liquid can cool the limiting column and the supporting plate, so that large-area uniform heat exchange with the surface of the battery can be realized by utilizing the limiting column and the supporting plate, and the battery can be efficiently cooled.

Description

Technical Field

[0001] The utility model relates to the field of battery packs, in particular to a liquid-cooled battery pack shell. Background Art

[0002] Existing battery packs mostly use air cooling technology, but air cooling presents numerous challenges, such as dust control. The need to both prevent dust from affecting the batteries and guide air to cool them presents a complex and conflicting requirement. Furthermore, air cooling struggles to control the unevenness of the battery pack's temperature field, preventing rapid temperature reduction of the battery packs within the pack. This leads to significant temperature differences between packs, shortening the pack's lifespan. To address this issue, liquid-cooled battery packs have emerged on the market, cooling the battery pack through the circulation of a cooling liquid, such as water. Liquid-cooled battery packs come in a variety of configurations, each with its own advantages and disadvantages.

[0003] China Authorization Publication No. CN205488351U discloses a liquid-cooled battery pack, comprising an upper shell, a lower shell, several battery packs, and cooling pipes. The interior of the upper shell is divided into several first battery pack placement areas by a first partition, and one or two upper notches are provided on the periphery of the upper shell; the interior of the lower shell is divided into several second battery pack placement areas by a second partition, and one or two lower notches are provided on the periphery of the lower shell; the upper shell and the lower shell are matched with each other, the first battery pack placement area and the second battery pack placement area are matched with each other to form a battery pack placement area, and the upper notches and the lower notches are matched with each other to form a cooling pipe placement opening. Several battery packs are arranged in rows and aligned perpendicular to the bottom of the lower shell, and each battery pack placement area has at least one row of battery packs. Cooling pipes are arranged along each battery pack placement area. The liquid-cooled battery pack of this utility model has a novel structure and can quickly reduce the temperature of the battery packs.

[0004] However, this device has the following drawbacks: The cooling tubes are arranged along each battery pack placement area, so heat can only be dissipated from two sides of the battery, resulting in uneven heat dissipation and a small heat dissipation area, which affects the heat dissipation effect. To address these drawbacks, we propose a liquid-cooled battery pack housing. Utility Model Content

[0005] The purpose of the present utility model is to solve the shortcomings of the prior art in that the cooling pipes are arranged along the placement area of ​​each battery pack, so that heat can only be dissipated on two sides of the battery, resulting in uneven heat dissipation and a small heat dissipation area, which affects the heat dissipation effect, and to propose a liquid-cooled battery pack shell.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solution: a liquid-cooled battery pack housing, comprising:

[0007] A housing, comprising a bottom plate, a top plate, and a protective frame disposed between the bottom plate and the top plate;

[0008] a heat dissipation structure comprising a battery receiving assembly disposed on an inner wall of the protective frame and a heat dissipation assembly disposed within the battery receiving structure;

[0009] An assembly structure, which is arranged on the surfaces of the bottom plate, the top plate and the protective frame, and is used to assemble the bottom plate, the top plate and the protective frame into one body;

[0010] The battery receiving assembly includes a support plate fixedly mounted on the inner wall of the protective frame, and a plurality of limit posts fixedly mounted on the upper surface of the support plate at equal intervals;

[0011] The heat dissipation assembly includes a liquid inlet pipe and a liquid discharge pipe respectively fixedly mounted on the surface of the protective frame, a plurality of longitudinal liquid inlet channels equidistantly arranged inside the support plate, a U-shaped guide groove arranged inside the limit column, and a connecting channel that connects the plurality of longitudinal liquid inlet channels to each other. The longitudinal liquid inlet channels are respectively composed of two first longitudinal liquid inlet grooves and a second longitudinal liquid inlet groove that are not connected to each other, and the two ends of the U-shaped guide groove are respectively connected to the interior of the first longitudinal liquid inlet groove and the second longitudinal liquid inlet groove.

[0012] Preferably, the left end of the liquid inlet pipe is communicated with the interior of the rightmost longitudinal liquid inlet channel in the support plate.

[0013] Preferably, the left end of the liquid drain pipe is communicated with the interior of the leftmost longitudinal liquid inlet channel in the support plate.

[0014] Preferably, the cavity between four adjacent limiting pillars is a battery storage cavity.

[0015] Preferably, the assembly structure includes assembly blocks fixedly mounted on the bottom plate, the top plate, and the surface of the protective frame, and threaded holes are provided on the surfaces of the assembly blocks.

[0016] Preferably, sealing strips are fixedly mounted on the lower surfaces of the protective frame and the top plate, and sealing grooves adapted to the sealing strips are formed on the upper surfaces of the bottom plate and the protective frame.

[0017] Preferably, the support plate and the limiting column are both made of copper metal.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. After setting up the heat dissipation structure and placing the battery in the battery storage cavity, the bottom plate, top plate, and protective frame are assembled into one using the assembly structure. At this time, the bottom of the battery will contact the support plate, and the sides of the battery will respectively contact the four limit posts. Then, coolant is injected into the liquid inlet pipe using an external liquid cooling system. The coolant will first enter the first longitudinal liquid inlet groove on the rightmost longitudinal liquid inlet channel, then enter the second longitudinal liquid inlet groove along the U-shaped diversion groove, and then enter multiple longitudinal liquid inlet channels and U-shaped diversion grooves one by one along the connection channel, and be discharged along the drain pipe to form a cycle. When the coolant enters the longitudinal liquid inlet channels and U-shaped diversion grooves, the coolant will cool down the limit posts and the support plate, so that the limit posts and the support plate can exchange heat evenly with a large area of the battery surface, and thus the battery can be cooled efficiently.

[0020] 2. After setting up the protective frame and placing the battery on the support plate, the battery will be inside the protective frame at this time. The battery is supported and limited by the support plate and the limit posts. Therefore, multiple groups of protective frames can be stacked and installed according to design requirements, so that the batteries can be connected in series or in parallel, and thus the flexibility of the device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present invention are used to explain the present utility model and do not constitute an improper limitation. In the drawings:

[0022] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0023] Figure 2 is a top cross-sectional schematic diagram of the protective frame of the present utility model;

[0024] Figure 3 is a front cross-sectional schematic diagram of the protective frame of the present utility model;

[0025] Figure 4 is Figure 1 an enlarged schematic diagram at position A in

[0026] Figure 5 is Figure 2 an enlarged schematic diagram at position B in

[0027] Reference numerals in the drawings: 1 bottom plate, 2 top plate, 3 protective frame, 4 support plate, 5 limit post, 6 liquid inlet pipe, 7 drain pipe, 8 connection channel, 9 U-shaped diversion groove, 10 longitudinal liquid inlet channel, 101 first longitudinal liquid inlet groove, 102 second longitudinal liquid inlet groove, 11 assembly block, 12 sealing strip, 13 sealing groove, 14 battery storage cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] See also Figure 1-5 The utility model provides a technical solution: a liquid-cooled battery pack shell, including: a shell, a heat dissipation structure, and an assembly structure.

[0030] The housing includes a bottom plate 1 , a top plate 2 , and a protection frame 3 disposed between the bottom plate 1 and the top plate 2 .

[0031] The assembly structure is arranged on the surface of the bottom plate 1, the top plate 2 and the protective frame 3, and is used to assemble the bottom plate 1, the top plate 2 and the protective frame 3 into one. The assembly structure includes assembly blocks 11 fixedly installed on the bottom plate 1, the top plate 2, and the surface of the protective frame 3, and threaded holes are opened on the surface of the assembly blocks 11. The bottom plate 1 and the top plate 2 are respectively placed on the upper and lower surfaces of the protective frame 3, and then fasteners are passed through the threaded holes, so that the bottom plate 1 and the top plate 2 can be fixedly installed on the bottom and top of the protective frame 3 respectively.

[0032] A sealing strip 12 is fixedly installed on the lower surface of the protective frame 3 and the top plate 2, and a sealing groove 13 that is compatible with the sealing strip 12 is opened on the upper surface of the bottom plate 1 and the protective frame 3. When the bottom plate 1 and the top plate 2 are respectively fixedly installed on the bottom and top of the protective frame 3, the sealing strip 12 will be inserted into the sealing groove 13, thereby improving the sealing performance of the device after assembly.

[0033] The heat dissipation structure includes a battery accommodating assembly arranged on the inner wall of the protection frame 3, and a heat dissipation assembly arranged inside the battery accommodating structure.

[0034] The battery accommodating assembly includes a support plate 4 fixedly mounted on the inner wall of the protective frame 3, and a plurality of limiting columns 5 fixedly mounted at equal intervals on the upper surface of the support plate 4. The cavity between four adjacent limiting columns 5 is a battery storage cavity 14. The materials of the support plate 4 and the limiting columns 5 are both made of copper metal. After the battery is placed on the support plate 4, the battery will be in the battery storage cavity 14 inside the protective frame 3. The support plate 4 and the limiting columns 5 can be used to support and limit the battery. Therefore, multiple protective frames 3 with batteries can be stacked and installed according to design requirements, so that the batteries can be connected in series or in parallel, thereby improving the flexibility of the device.

[0035] The heat dissipation component includes a liquid inlet pipe 6 and a liquid discharge pipe 7 fixedly installed on the surface of the protective frame 3 respectively, a plurality of longitudinal liquid inlet channels 10 equidistantly arranged inside the support plate 4, a U-shaped diversion groove 9 arranged inside the limit column 5, and a connection channel 8 that connects the plurality of longitudinal liquid inlet channels 10 to each other. The longitudinal liquid inlet channels 10 are respectively composed of two non-connected first longitudinal liquid inlet grooves 101 and second longitudinal liquid inlet grooves 102. The two ends of the U-shaped diversion groove 9 are respectively connected to the inside of the first longitudinal liquid inlet groove 101 and the second longitudinal liquid inlet groove 102. The left end of the liquid inlet pipe 6 is connected to the inside of the rightmost longitudinal liquid inlet channel 10 in the support plate 4, and the left end of the liquid discharge pipe 7 is connected to the inside of the leftmost longitudinal liquid inlet channel 10 in the support plate 4. <'

[0036] After the battery is placed in the battery storage cavity 14, then the bottom plate 1, the top plate 2 and the protective frame 3 are assembled into one body by using the assembly structure. At this time, the bottom of the battery will contact the support plate 4, and the sides of the battery will respectively contact the four limit columns 5. Then, a coolant is injected into the liquid inlet pipe 6 by using an external liquid cooling system. The coolant will first enter the first longitudinal liquid inlet groove 101 on the rightmost longitudinal liquid inlet channel 10, then enter the second longitudinal liquid inlet groove 102 along the U-shaped diversion groove 9, and then enter the plurality of longitudinal liquid inlet channels 10 and the U-shaped diversion groove 9 one by one along the connection channel 8 and be discharged along the liquid discharge pipe 7 to form a cycle. When the coolant enters the longitudinal liquid inlet channels 10 and the U-shaped diversion groove 9, the coolant will cool down the limit columns 5 and the support plate 4, so that the limit columns 5 and the support plate 4 can exchange heat with the surface of the battery in a large area and evenly, and thus the battery can be cooled efficiently.

[0037] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent replacement or change made by those skilled in the art according to the technical solution and concept of the present invention should be covered within the protection scope of the present invention.

Claims

1. Liquid-cooled battery pack housing, characterized in that: include: A housing, comprising a bottom plate (1), a top plate (2), and a protective frame (3) disposed between the bottom plate (1) and the top plate (2); A heat dissipation structure, the heat dissipation structure comprising a battery containing assembly arranged on the inner wall of the protection frame (3), and a heat dissipation assembly arranged inside the battery containing structure; An assembly structure, the assembly structure being arranged on the surfaces of the bottom plate (1), the top plate (2) and the protective frame (3) and being used for assembling the bottom plate (1), the top plate (2) and the protective frame (3) into one body; The battery receiving assembly comprises a support plate (4) fixedly mounted on the inner wall of the protection frame (3), and a plurality of limit posts (5) fixedly mounted at equal intervals on the upper surface of the support plate (4); The heat dissipation component comprises a liquid inlet pipe (6) and a liquid discharge pipe (7) respectively fixedly mounted on the surface of the protective frame (3), a plurality of longitudinal liquid inlet channels (10) equidistantly arranged inside the support plate (4), a U-shaped guide groove (9) arranged inside the limiting column (5), and a connecting channel (8) for interconnecting the plurality of longitudinal liquid inlet channels (10), wherein the longitudinal liquid inlet channels (10) are respectively composed of two mutually unconnected first longitudinal liquid inlet grooves (101) and second longitudinal liquid inlet grooves (102), and the two ends of the U-shaped guide groove (9) are respectively connected to the interior of the first longitudinal liquid inlet groove (101) and the second longitudinal liquid inlet groove (102).

2. The liquid-cooled battery pack housing according to claim 1, wherein: The left end of the liquid inlet pipe (6) is in communication with the interior of the rightmost longitudinal liquid inlet channel (10) in the support plate (4).

3. The liquid-cooled battery pack housing according to claim 1, wherein: The left end of the liquid discharge pipe (7) is in communication with the interior of the leftmost longitudinal liquid inlet channel (10) in the support plate (4).

4. The liquid-cooled battery pack housing according to claim 1, wherein: The cavity between the four adjacent limiting columns (5) is a battery storage cavity (14).

5. The liquid-cooled battery pack housing according to claim 1, wherein: The assembly structure comprises assembly blocks (11) fixedly mounted on the bottom plate (1), the top plate (2), and the surface of the protective frame (3), and threaded holes are provided on the surfaces of the assembly blocks (11).

6. The liquid-cooled battery pack housing according to claim 1, wherein: The lower surfaces of the protective frame (3) and the top plate (2) are both fixedly mounted with sealing strips (12), and the upper surfaces of the bottom plate (1) and the protective frame (3) are both provided with sealing grooves (13) adapted to the sealing strips (12).

7. The liquid-cooled battery pack housing according to claim 1, wherein: The support plate (4) and the limiting column (5) are both made of copper metal.

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