Liquid-cooled battery module

Abstract

The liquid-cooled battery module provided by the utility model is good in heat dissipation performance and low in maintenance cost. The liquid cooling module comprises a liquid cooling module, the liquid cooling module comprises a module mounting groove and a battery cell module, the inner surface of the module mounting groove is tightly attached to the corresponding outer surface of the battery cell module, and the module mounting groove comprises a first heat dissipation side plate and a second heat dissipation side plate; condensation pipes are arranged on the outer surface of the first heat dissipation side plate and the outer surface of the second heat dissipation side plate, each condensation pipe comprises a water inlet and a water outlet, condensation pipe sections arranged in an S shape are arranged between the water inlets and the water outlets, and the water inlets are lower than the water outlets. The utility model relates to the technical field of electric energy storage.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy storage, in particular to a liquid-cooled battery module. BACKGROUND

[0002] The battery liquid cooling technology is a kind of efficient battery thermal management technology, which circulates through liquid medium, carries away the heat generated by battery, thereby maintaining the battery in the suitable temperature range.

[0003] At present, the liquid cooling technology of module develops rapidly, and the general process of current liquid cooling technology is that the battery cell is used to form a module, and then the module is assembled into a PACK box with a liquid cooling plate, the battery cell only contacts the cooling plate at the bottom, and the heat can only be transferred to the liquid cooling plate through the bottom of the battery cell, and the liquid cooling plate carries away the heat of the battery cell through fluid flow, to achieve the effect of heat dissipation and cooling. The heat dissipation effect of this method is better than that of air cooling, but the heat dissipation effect of the bottom is still not the best, and the size of the PACK box with the liquid cooling plate is fixed, and the compatibility is low. Some designs pass liquid cooling pipes between the large faces of the battery cell, which improves the heat dissipation efficiency, but with the circulation and expansion of the battery cell, the liquid cooling pipes may be crushed and broken, thereby being invalid and leaking, increasing the maintenance cost and having great safety hazards. Therefore, it is necessary to develop a liquid-cooled battery module with good heat dissipation performance, flexible assembly, safety and reliability. SUMMARY

[0004] In view of the problems existing in the prior art, the utility model provides a liquid-cooled battery module, which aims to solve the problems of solidification of the liquid cooling module, safety hazards of the heat dissipation structure and insufficient heat dissipation effect in the prior art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a liquid-cooled battery module, comprising a liquid cooling module, the liquid cooling module comprising a module mounting groove and a battery cell module, the inner surface of the module mounting groove is tightly combined with the corresponding outer surface of the battery cell module, the module mounting groove comprises a first heat dissipation side plate and a second heat dissipation side plate, the outer surface of the first heat dissipation side plate and the second heat dissipation side plate is provided with a condenser pipe, the condenser pipe comprises a water inlet and a water outlet, the condenser pipe section arranged in S shape is arranged between the water inlet and the water outlet, and the water inlet is lower than the water outlet.

[0006] Based on the above, the first heat dissipation side plate and the second heat dissipation side plate are attached to the battery module, so that the battery module is limited and pressed, and the expansion of the battery module directly extruding the condenser pipe is prevented, so that the condenser pipe is not damaged and the service life is prolonged, and the safety hidden danger is reduced. The condenser pipe on the first heat dissipation side plate and the second heat dissipation side plate can quickly dissipate heat of the battery module, and the S-shaped arrangement of the condenser pipe can increase the heat exchange time of the liquid with the battery module, thereby improving the heat dissipation capacity. Each liquid cooling module has an independent condensing system, and can be naturally spliced between modules to form a PACK box according to requirements, thereby improving the compatibility of the battery module, facilitating maintenance, allowing separate disassembly, and reducing maintenance cost in the later period.

[0007] Further, the module mounting groove further comprises a bottom plate and a side end plate, the bottom plate, the side end plate, the first heat dissipation side plate and the second heat dissipation side plate are all made of magnesium-aluminum alloy and are fixedly connected by screws.

[0008] Based on the above, the magnesium-aluminum alloy material has strong heat dissipation capacity, thereby improving the heat dissipation capacity of the battery module.

[0009] Further, the battery module is composed of a plurality of battery cells of the same type and size, and the battery cells are attached to each other by narrow surfaces, and the wide surfaces of the battery cells are attached to the first heat dissipation side plate and the second heat dissipation side plate.

[0010] Based on the above, the wide surfaces of the battery cells are attached to the first heat dissipation side plate and the second heat dissipation side plate, thereby increasing the heat dissipation area and improving the heat dissipation efficiency.

[0011] Further, a silica gel pad is arranged between the battery cells and the side end plate.

[0012] Based on the above, the silica gel pad can buffer and absorb shock, prevent the battery module from being damaged by impact, and improve safety. Meanwhile, the silica gel pad has insulation and heat dissipation effects, and can insulate electricity and enhance heat dissipation.

[0013] Further, the cross section of the condenser pipe is rectangular.

[0014] Based on the above, the rectangular pipe shape can increase the attached area, thereby improving the cooling effect of the cooling liquid.

[0015] In order to make the above features of the utility model and the purposes to be achieved more clearly, the utility model will be further described in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1: it is the explosion view of the utility model;

[0017] Figure 2 : it is the structure schematic diagram of liquid cooling module combination arrangement;

[0018] Figure 3 : it is the explosion structure schematic diagram of liquid cooling module;

[0019] Figure 4 : it is the marking schematic diagram of L1, L2, L3 and H2 of the utility model;

[0020] Figure 5 : it is the marking schematic diagram of H1, T1 and W1 of the utility model;

[0021] Figure 6 : it is the marking schematic diagram of L4, L5, L6, L7, H4, T4 and D of the utility model;

[0022] Figure 7 : it is the marking schematic diagram of T3, W2, H3, L4, L5 and D of the utility model;

[0023] Figure 8 : it is the marking schematic diagram of L7, L8, L9 and W3 of the utility model.

[0024] Explanation of figure mark number: 1 liquid cooling module;2 module installation groove;3 electric core module;4 first radiating side plate;5 second radiating side plate;6 condensing pipe;7 water inlet;8 water outlet;9 condensing pipe section;10 bottom plate;11 side end plate;12 electric core;13 silica gel pad. Specific implementation

[0025] As Figures 1 to 8 shown, including liquid cooling module 1, the liquid cooling module 1 includes module installation groove 2 and electric core module 3, the inner surface of the module installation groove 2 is tightly combined with the corresponding outer surface of the electric core module 3, the module installation groove 2 includes first radiating side plate 4 and second radiating side plate 5, the first radiating side plate 4 and the second radiating side plate 5 are provided with condensing pipe 6, the condensing pipe 6 includes water inlet 7 and water outlet 8, the water inlet 7 and water outlet 8 are provided with S-shaped arrangement condensing pipe section 9, and the water inlet 7 is lower than the water outlet 8.The module installation groove 2 further includes bottom plate 10 and side end plate 11, the bottom plate 10, side end plate 11, first radiating side plate 4 and second radiating side plate 5 are made of magnesium-aluminum alloy, and are fixedly matched by screw.

[0026] The battery module is composed of the bottom plate 10, the first heat dissipation side plate 4, the second heat dissipation side plate 5, the side end plate 11, the condenser pipe 6 and the battery cell 12.

[0027] In summary, the specific embodiment of the utility model is:

[0028] Reference Figures 1 to 8

[0029] The utility model provides a kind of liquid-cooled battery module, and the battery module is composed of bottom plate 10, first heat dissipation side plate 4, second heat dissipation side plate 5, side end plate 11, condenser pipe 6 and battery cell 12.

[0030] The size of the battery cell 12 is 72x173x204 (thickness T1xwidth W1xheight H1), and the capacity of a single battery cell 12 is 280 Ah. The condensing pipe 6 is an S-shaped copper pipe, and the length L1 of the condensing pipe 6 is n x W1+ (n+1) x T2 (the thickness T2 of the silica gel pad 13 is 2 mm) (n is the number of battery cells 12) = 4 x 173 + 5 x 2 = 702 mm. The pipe diameter of the condensing pipe 6 is a square hole with a side length L2 of 8 mm, and the spacing L3 between adjacent condensing pipes 6 is 16 mm. The total height H2 of the condensing pipe 6 is (N x L2) + (N-1) x L3 = 176 mm. The side end plate 11 has a thickness T3 of 20 mm, a height H3 of H1 = 204 mm, and a width W2 of T1 + 1 mm = 73 mm. Four holes with a diameter D of 8 mm are arranged in the middle of the side end plate 11, and the center distance of the top hole from the top end L4 is 14 mm, and the center distance of each subsequent hole L5 is 49 mm. The first heat dissipation side plate 4 and the second heat dissipation side plate 5 have the same size, and the length L6 of the first heat dissipation side plate 4 is n x W1+ (n+1) x T2+ 2 x T3 = 742 mm. The height H4 of the first heat dissipation side plate is H1 + T5 (the thickness T5 of the bottom plate is 12 mm) = 216 mm. The thickness T4 of the first heat dissipation side plate is 10 mm. The first heat dissipation side plate 4 has five holes on both sides, with a diameter D of 8 mm. The center distance of the top hole from the top edge of the first heat dissipation side plate 4 is L4 = 14 mm, and the center distance of each subsequent hole is L5 = 49 mm. The bottom end of the first heat dissipation side plate 4 is provided with seven holes in addition to the two holes on both sides, each with a diameter D of 8 mm, and the center distance L7 is 90 mm. The length L8 of the bottom plate 10 is L6 = 742 mm, and the width W3 of the bottom plate 10 is W2 + 2 x T4 = 93 mm. The holes on the bottom plate 10 are arranged in a central symmetry, and there are nine holes with a diameter D of 8 mm. The center distance of the two outermost holes from the side edge of the bottom plate 10 is L9 = 10 mm, and the center distance of the remaining holes is L7 = 90 mm.

[0031] The bottom plate 10, side end plate 11, first heat dissipation side plate 4 and second heat dissipation side plate 5 are made of magnesium-aluminum alloy and are fixedly connected by screws to form the module mounting groove 2. The battery cell module 3 is installed in the module mounting groove 2, and the outer end faces of the first heat dissipation side plate 4 and the second heat dissipation side plate 5 are bonded to the condensing pipe 6 by an adhesive. The condensing liquid enters from the water inlet 7 at the bottom of the condensing pipe 6 and flows out from the water outlet 8 at the top of the condensing pipe 6, thereby increasing the heat exchange time of the condensing liquid and achieving good heat exchange effect. The assembled condensing module 1 can be assembled into a PACK box by using an aluminum bar as a carrier. Since the condensing module 1 has a separate disassembly structure, it is more convenient to disassemble and repair, thereby reducing maintenance costs.

[0032] The above merely describes the best solution embodiment of the present application, and is not used to limit the present application. Various modifications or replacements of the present application made by those skilled in the art without departing from the essence and protection scope of the present application shall be within the protection scope of the present application.

Claims

1. A liquid-cooled battery module comprising a liquid-cooled module (1), characterized in that, The liquid cooling module (1) comprises a module installation groove (2) and an electric core module (3), the inner surface of the module installation groove (2) is tightly combined with the corresponding outer surface of the electric core module (3), the module installation groove (2) comprises a first heat dissipation side plate (4) and a second heat dissipation side plate (5), the outer surface of the first heat dissipation side plate (4) and the second heat dissipation side plate (5) is provided with a condenser pipe (6), the condenser pipe (6) comprises a water inlet (7) and a water outlet (8), the water inlet (7) and the water outlet (8) are provided with a condenser pipe section (9) arranged in an S shape, and the water inlet (7) is lower than the water outlet (8).

2. The liquid-cooled battery module of claim 1, wherein: The module installation groove (2) further comprises a bottom plate (10) and a side end plate (11), the bottom plate (10), the side end plate (11), the first heat dissipation side plate (4) and the second heat dissipation side plate (5) are all made of magnesium-aluminum alloy and are fixedly connected through screws.

3. The liquid-cooled battery module of claim 1, wherein: The electric core module (3) is composed of a plurality of electric cores (12) of the same type and size, the plurality of electric cores (12) are integrally combined through narrow surfaces, and the wide surfaces on both sides of the electric core (12) are combined with the first heat dissipation side plate (4) and the second heat dissipation side plate (5) respectively.

4. The liquid-cooled battery module of claim 3, wherein: A silica gel pad (13) is arranged between any adjacent electric cores (12) and between the electric core (12) and the side end plate (11).

5. The liquid-cooled battery module of claim 1, wherein: The cross section of the condenser pipe (6) is rectangular.

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