Battery liquid cooling module

Abstract

The utility model provides a battery liquid cooling module which comprises a battery module, a battery module fixing frame and a liquid cooling assembly, liquid cooling plates are respectively arranged on two opposite sides of the battery module fixing frame, and the liquid cooling plates are communicated through liquid cooling pipes to form a loop, so that circulating liquid takes away heat generated by the battery module; and the safety of the battery module is improved. The elastic insulating heat conduction pad is arranged between the liquid cooling plate and the battery module fixing frame, and the liquid cooling pipe is arranged to be the corrugated pipe with the expansion joint, so that the flowing stroke of liquid can be increased, the heat dissipation effect is improved, the corrugated pipe can absorb deformation and displacement caused by thermal expansion and cold contraction or mechanical vibration in a pipeline system, and the heat dissipation efficiency is improved. The compensation effect is achieved; by arranging the telescopic joints and the corrugated pipes, the length can be adjusted, the installation size error of the liquid cooling plates on the two sides and the distance change between the liquid cooling plates can be made up, the anti-loosening and cushioning effects are achieved, and liquid leakage caused by loosening of the clamping parts in the using process is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery liquid cooling module. Background Art

[0002] With the development of the new energy vehicle industry, the popularity of electric vehicles has placed higher and higher requirements on battery packs. During the use of the battery pack, due to the internal resistance of the internal battery cells, a certain amount of heat will be generated, causing the internal temperature of the battery pack to rise. If the heat is not dissipated in time, it may cause a violent chemical reaction inside the battery pack, generating a large amount of heat, causing the battery pack to leak, deflate, smoke, and even explode in severe cases. As electric vehicles become more and more popular, accidents or failures caused by abnormal battery pack temperatures occur from time to time. Therefore, when manufacturing electric vehicles, higher and higher requirements are also placed on the thermal management components of the battery module products that are compatible with electric vehicles and the corresponding battery module product systems.

[0003] At present, the thermal management method of battery module product systems commonly used in the battery industry is liquid cooling, which uses water flow in the liquid cooling pipeline to remove the heat generated during the operation of the battery module product system. However, the liquid cooling plate in the prior art is only installed at the bottom or side of the battery module, and the contact area with the battery module is small, which cannot achieve a good heat dissipation function; and the liquid cooling pipe cannot be extended and adjusted according to the position of the liquid cooling plate, the installation error is large, and there is a risk of leakage. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the shortcomings of the prior art, a battery liquid cooling module is provided which has a large heat dissipation area, a liquid cooling pipe that can be telescopically adjusted, is anti-loosening and anti-vibration, and has a simple structure and is easy to disassemble and assemble. The battery liquid cooling module provided in the present application adopts the following technical solution:

[0005] A battery liquid cooling module comprises a battery module, a battery module fixing frame and a liquid cooling assembly, wherein the liquid cooling assembly comprises a plurality of liquid cooling plates and liquid cooling pipes, wherein the liquid cooling plates are detachably mounted on the outside of the battery module fixing frame, the liquid cooling pipes are corrugated pipes with expansion joints mounted between the liquid cooling plates, and an elastic insulating thermal pad is installed between the liquid cooling plates and the battery module fixing frame.

[0006] Furthermore, the battery module fixing frame includes a first end plate, a second end plate and a plurality of guide columns, and the guide columns are detachably installed between the first end plate and the second end plate.

[0007] Furthermore, the liquid cooling plate is mounted on the outer sides of the first end plate and the second end plate through fasteners.

[0008] Furthermore, the first end plate and the second end plate are both provided with thermal pad grooves on their outer sides, and the insulating thermal pad is pasted in the thermal pad grooves.

[0009] Furthermore, the battery module includes a battery fixing frame, a battery connecting piece and a plurality of batteries, wherein the battery connecting piece is connected to both ends of the battery, and the battery and the battery connecting piece are connected and fixed and then placed in the cavity of the battery fixing frame.

[0010] Furthermore, a plurality of the battery modules are sequentially installed in the cavity of the battery module fixing frame, and conductive sheets are arranged between the plurality of battery modules for series or parallel connection.

[0011] Furthermore, a battery module mounting groove adapted to the battery module is disposed on the inner side of each of the first end plate and the second end plate, and the battery module mounting groove is communicated with the thermal pad groove.

[0012] Furthermore, the liquid cooling plate is respectively provided with a liquid cooling water inlet and a liquid cooling water outlet.

[0013] Furthermore, the surface of the liquid cooling plate in contact with the insulating thermally conductive pad is a plane, and the surface away from the insulating thermally conductive pad is provided with a protrusion and a plurality of mutually parallel grooves.

[0014] Furthermore, an insulating protective layer is sprayed on the surface of the liquid cooling plate in contact with the insulating thermal pad.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. By installing liquid cooling plates on the outside of the first end plate and the second end plate of the battery module fixing frame respectively, and connecting the liquid cooling plates on both sides through liquid cooling pipes to form a loop, not only the uniformity of liquid cooling is ensured, but also the heat dissipation area between the battery module and the liquid cooling plate is increased. The heat generated by the battery module is taken away by the circulating liquid, avoiding high temperature problems and improving the safety of the battery module.

[0017] 2. By installing an elastic insulating thermal pad between the liquid cooling plate and the battery module fixing frame, a pre-tightening force can be generated between the liquid cooling plate and the battery module fixing frame, so that the liquid cooling plate and the battery module can be closely fitted, thereby improving the heat conduction and heat dissipation effects; by setting the liquid cooling pipe as a bellows with an expansion joint, not only can the flow stroke of the liquid be increased and the heat dissipation effect be improved, but the bellows can also absorb the deformation and displacement caused by thermal expansion and contraction or mechanical vibration in the pipeline system, thereby playing a compensatory role; since the elastic insulating thermal pad allows the degree of tightening and fitting between the liquid cooling plate and the battery module fixing frame to be adjusted, the spacing between the liquid cooling plates varies. By setting the expansion joint, the bellows can be adjusted in length, which can compensate for the dimensional error of the installation of the liquid cooling plates on both sides and the change in the spacing between the liquid cooling plates, and has the effect of preventing loosening and absorbing shock, thereby effectively preventing the clamping parts from loosening and leaking during use.

[0018] 3. By arranging an insulating thermal pad between the first end plate, the second end plate and the liquid cooling plate, on the one hand, it can prevent the liquid cooling plate from directly and rigidly contacting the battery module, so that there is a buffer medium between the liquid cooling plate and the battery module, thereby ensuring the tightness and stability of the connection between the liquid cooling plate and the battery module, accelerating heat conduction and heat dissipation, and enabling the battery module to have a good heat dissipation effect; on the other hand, the insulating thermal pad has an insulating effect, which can prevent the battery module from forming a short circuit through the liquid cooling plate, thereby ensuring the safety of the battery liquid cooling module of the present application.

[0019] 4. By arranging the liquid cooling plate to be detachably mounted on the outside of the first end plate and the second end plate, and arranging the guide column to be detachably mounted between the first end plate and the second end plate, the battery liquid cooling module of the present application can be freely disassembled and assembled according to usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the assembly structure of a battery liquid cooling module of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the battery module of the utility model;

[0022] Figure 3 It is a schematic diagram of the inner structure of the first end plate of the utility model;

[0023] Figure 4 It is a schematic diagram of the outer structure of the first end plate of the utility model.

[0024] Reference numerals:

[0025] 1-battery module, 11-battery fixing frame, 12-battery connecting piece, 13-battery;

[0026] 2-battery module fixing frame, 21-first end plate, 22-second end plate, 23-guide column, 24-thermal pad groove, 25-second threaded hole, 26-battery module mounting groove, 27-first mounting hole;

[0027] 3-liquid cooling assembly, 31-liquid cooling plate, 32-liquid cooling pipe, 33-expansion joint, 34-groove, 35-protrusion, 36-second mounting hole, 37-liquid cooling water inlet;

[0028] 4- Insulation thermal pad. DETAILED DESCRIPTION

[0029] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] A battery liquid cooling module provided in the present application includes a battery module 1, a battery module fixing frame 2 and a liquid cooling assembly 3, characterized in that the liquid cooling assembly 3 includes a plurality of liquid cooling plates 31 and liquid cooling pipes 32, the liquid cooling plates 31 are detachably mounted on the outside of the battery module fixing frame 2, the liquid cooling pipes 32 are mounted between the liquid cooling plates 31, the liquid cooling pipes 32 are corrugated pipes with expansion joints 33, and an elastic insulating thermal pad 4 is installed between the liquid cooling plates 31 and the battery module fixing frame 2.

[0032] like Figure 1As shown, a battery liquid cooling module of the present application is provided with liquid cooling plates 31 on the outer sides of the two opposite ends of the battery module fixing frame 2, and the liquid cooling plates 31 on both sides are connected by liquid cooling pipes 32 to form a loop, which not only ensures the uniformity of liquid cooling, but also increases the heat dissipation area between the battery module 1 and the liquid cooling plate 31. The heat generated by the battery module 1 is taken away by the circulating liquid, thereby avoiding high temperature problems and improving the safety of the battery module 1. By installing an elastic insulating thermal pad 4 between the liquid cooling plate 31 and the battery module fixing frame 2, a pre-tightening force can be generated between the liquid cooling plate 31 and the battery module fixing frame 2, so that the liquid cooling plate 31 and the battery module 1 can be closely fitted, thereby improving the heat conduction and heat dissipation effects; by setting the liquid cooling pipe 32 as a bellows with an expansion joint 33, not only can the flow stroke of the liquid be increased and the heat dissipation effect be improved, but the bellows can also absorb the deformation and displacement caused by thermal expansion and contraction or mechanical vibration in the pipeline system, thereby playing a compensatory role; due to the elastic insulating thermal pad 4, the degree of tightening and fitting between the liquid cooling plate 31 and the battery module fixing frame 2 can be adjusted, and the spacing between the liquid cooling plates 31 will be different if the tightening degree is different. By setting the expansion joint 33, the length of the bellows can be adjusted, which can compensate for the dimensional error of the installation of the liquid cooling plates 31 on both sides and the change in the spacing between the liquid cooling plates 31, and has the effect of preventing loosening and absorbing shock, thereby effectively preventing the clamping parts from loosening and leaking during use.

[0033] In some embodiments, Figure 1 and Figure 3 As shown, the battery module fixing frame 2 includes a first end plate 21, a second end plate 22 and a plurality of guide columns 23, and the guide columns 23 are detachably mounted between the first end plate 21 and the second end plate 22. The first end plate 21 and the second end plate 22 are both structures with a through middle, and first threaded holes (not shown in the figure) are arranged at both ends of the guide columns 23, and first mounting holes 27 matching the first threaded holes are arranged around the inner sides of the first end plate 21 and the second end plate 22. The first fastener passes through the first mounting hole 27, and the first end plate 21 and the second end plate 22 are threadedly connected with the first threaded holes on the guide columns 23 to realize the assembly of the battery module fixing frame 2. By setting the guide columns 23 and the first end plate 21 and the second end plate 22 as threaded connections, the assembly and disassembly of the battery module fixing frame 2 can be facilitated, so that the battery module fixing frame 2 can be assembled according to battery modules 1 of different models and sizes.

[0034] In some embodiments, Figure 1 and Figure 4 As shown, the liquid cooling plate 31 is mounted on the outside of the first end plate 21 and the second end plate 22 by fasteners. Figure 1As shown, a plurality of second threaded holes 25 are arranged around the outer sides of the first end plate 21 and the second end plate 22, a plurality of second mounting holes 36 matching the second threaded holes 25 are arranged on the liquid cooling plate 31, and the liquid cooling tube 32 is mounted on the outer sides of the first end plate 21 and the second end plate 22 through the second fastener. By detachably mounting the liquid cooling plate 31 on the outer sides of the first end plate 21 and the second end plate 22, the heat generated by the battery module 1 can be taken away by the liquid cooling plates 31 on both sides, the heat dissipation efficiency is higher, and the liquid cooling plate 31 can be conveniently installed and removed according to the use requirements.

[0035] As a preferred embodiment, the first fastener and the second fastener can be bolts, screws or studs.

[0036] In some embodiments, Figure 1 and Figure 4 As shown, the first end plate 21 and the second end plate 22 are both provided with a thermal pad groove 24 on the outside, and an insulating thermal pad 4 is pasted in the thermal pad groove 24. Insulating thermal pads 4 are pasted in the thermal pad grooves 24 on the outside of the first end plate 21 and the second end plate 22 by thermal conductive adhesive, and the liquid cooling plate 31 is installed on the outside of the insulating thermal pad 4 and fixed on the first end plate 21 and the second end plate 22. By installing the elastic insulating thermal pad 4, on the one hand, it can prevent the liquid cooling plate 31 from directly and rigidly contacting the battery module 1, so that there is a buffer medium between the liquid cooling plate 31 and the battery module 1, and the tightness and stability of the connection between the liquid cooling plate 31 and the battery module 1 are ensured. At the same time, the direct contact between the insulating thermal pad 4 and the battery module 1 can accelerate heat conduction and heat dissipation, so that the battery module 1 has a good heat dissipation effect; on the other hand, the insulating thermal pad 4 has an insulating effect, which can prevent the battery module 1 from forming a short circuit through the liquid cooling plate 31, and ensure the safety of the battery liquid cooling module of the present application.

[0037] As a preferred embodiment, the insulating thermal pad 4 is a thermally conductive silicone pad.

[0038] In some embodiments, Figure 2 As shown, the battery module 1 includes a battery fixing frame 11, a battery connecting piece 12 and a plurality of batteries 13. The battery connecting piece 12 is welded at both ends of the battery 13. The battery 13 and the battery connecting piece 12 are connected and fixed and then placed in the cavity of the battery fixing frame 11. At least one layer of battery array consisting of a plurality of batteries 13 is provided in the battery module 1. Battery connecting pieces 12 are welded at both ends of the batteries 13 in each layer of the battery array, and the battery 13 is connected in series and in parallel through the battery connecting piece 12.

[0039] As a preferred embodiment, the battery 13 is specifically a square cylindrical battery, and more preferably a lithium titanate square cylindrical battery.

[0040] In some embodiments, a plurality of battery modules 1 are sequentially installed in the cavity of the battery module fixing frame 2, and the plurality of battery modules 1 are connected in series or in parallel via conductive sheets. Figure 1 As shown, one end of the battery module 1 is sequentially installed on the inner side of the first end plate 21, and the second end plate 22 is buckled to the other end of the battery module 1 to fix the battery module 1. The guide column 23 can limit and fix the edge of the battery module 1 to keep the battery module 1 firmly installed. The battery connecting sheet 12 is provided with a plurality of connecting holes, and the battery connecting sheets 12 on each battery module 1 are connected by connecting bolts through conductive sheets to realize the series or parallel connection of the battery modules 1.

[0041] As a preferred embodiment, Figure 3 As shown, the first end plate 21 and the second end plate 22 are both provided with a battery module mounting groove 26 adapted to the end of each of the battery modules 1 on the inner side, and the two ends of the battery module 1 are respectively installed in the battery module mounting groove 26, and the battery module mounting groove 26 is connected with the thermal pad groove 24. By providing the battery module mounting groove 26 on the inner side of the first end plate 21 and the second end plate 22, on the one hand, the battery module 1 can be limited so that the battery module 1 can be more firmly installed in the cavity of the battery module fixing frame 2, and on the other hand, the height of the battery liquid cooling module of the present application can be reduced to save installation space. By connecting the battery module mounting groove 26 with the thermal pad groove 24, the insulating thermal pad 4 can be directly and tightly fitted with the battery connecting pieces 12 at both ends of the battery module 1 to reduce the heat conduction path and improve the heat conduction effect.

[0042] In some embodiments, Figure 2 As shown, the liquid cooling plate 31 is respectively provided with a liquid cooling water inlet 37 and a liquid cooling water outlet (not shown in the figure). Liquid is injected into the liquid cooling component 3 through the liquid cooling water inlet 37, and the liquid is outflowed and recovered through the liquid cooling water outlet to take away the heat generated by the battery module 1. By respectively providing the liquid cooling water inlet 37 and the liquid cooling water outlet on the liquid cooling plates 31 on both sides to form an inlet-outlet relationship, the liquid cooling component 3 can balance the temperature of the coolant in the flow channel by itself, achieve temperature balance of the entire liquid cooling component 3, and thereby improve the heat dissipation effect of the battery module 1.

[0043] As a preferred embodiment, Figure 2As shown, the surface of the liquid cooling plate 31 in contact with the insulating thermal pad 4 is a plane, and the surface away from the insulating thermal pad 4 is provided with a protrusion 35 and a plurality of mutually parallel grooves 34. By making the surface of the liquid cooling plate 31 in contact with the insulating thermal pad 4 a plane, it is possible to ensure that the liquid cooling plate 31 and the insulating thermal pad 4 are closely fitted, so that the heat generated by the battery module 1 can be better transmitted to the liquid cooling plate 31 through the insulating thermal pad 4, thereby achieving a better heat dissipation effect; a protrusion 35 and a plurality of mutually parallel grooves 34 are provided on the surface away from the insulating thermal pad 4, and the coolant can flow in the cavity formed by the protrusion 35; a plurality of mutually parallel grooves 34 divide the flat cavity formed by the protrusion 35 into a plurality of mutually parallel shunt channels, so that the flow resistance of the coolant to different shunt channels is kept consistent, thereby ensuring that the Reynolds number and heat transfer coefficient of the coolant in each part of the liquid cooling plate 31 are consistent, so that the heat dissipation in different parts of the liquid cooling plate 31 is kept consistent, thereby making the temperature of the battery module 1 uniform, and extending the service life of the battery module 1.

[0044] As a preferred embodiment, the surface of the liquid cooling plate 31 in contact with the insulating thermal pad 4 is sprayed with an insulating protective layer to prevent the battery module 1 from forming a short circuit through the liquid cooling plate 31, thereby ensuring the safety of the battery liquid cooling module of the present application.

[0045] As a preferred embodiment, the liquid cooling plate 31 may be a copper liquid cooling plate or an aluminum liquid cooling plate.

[0046] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not deviate from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A battery liquid cooling module, comprising a battery module, a battery module fixing frame and a liquid cooling assembly, characterized in that: The liquid cooling assembly includes a plurality of liquid cooling plates and liquid cooling tubes. The liquid cooling plates are detachably mounted on the outside of the battery module fixing frame. The liquid cooling tubes are corrugated tubes with expansion joints mounted between the liquid cooling plates. An elastic insulating thermal pad is installed between the liquid cooling plates and the battery module fixing frame.

2. A battery liquid cooling module according to claim 1, characterized in that: The battery module fixing frame includes a first end plate, a second end plate and a plurality of guide posts, wherein the guide posts are detachably mounted between the first end plate and the second end plate.

3. A battery liquid cooling module according to claim 2, characterized in that: The liquid cooling plate is mounted on the outer sides of the first end plate and the second end plate by fasteners.

4. A battery liquid cooling module according to claim 3, characterized in that: The first end plate and the second end plate are both provided with thermal pad grooves on the outside, and the insulating thermal pad is pasted in the thermal pad grooves.

5. A battery liquid cooling module according to claim 1, characterized in that: The battery module comprises a battery fixing frame, a battery connecting piece and a plurality of batteries, wherein the battery connecting piece is connected to two ends of the battery, and the battery and the battery connecting piece are connected and fixed and then placed in the cavity of the battery fixing frame.

6. A battery liquid cooling module according to claim 5, characterized in that: A plurality of battery modules are installed in sequence in the cavity of the battery module fixing frame, and conductive sheets are arranged between the battery modules for series or parallel connection.

7. A battery liquid cooling module according to claim 4, characterized in that: The first end plate and the second end plate are both provided with a battery module mounting groove adapted to the battery module on their inner sides, and the battery module mounting groove is communicated with the thermal pad groove.

8. A battery liquid cooling module according to claim 7, characterized in that: The liquid cooling plate is respectively provided with a liquid cooling water inlet and a liquid cooling water outlet.

9. A battery liquid cooling module according to claim 8, characterized in that: The surface of the liquid cooling plate in contact with the insulating thermal pad is a plane, and the surface away from the insulating thermal pad is provided with a protrusion and a plurality of grooves parallel to each other.

10. A battery liquid cooling module according to claim 9, characterized in that: The surface of the liquid cooling plate in contact with the insulating thermal pad is sprayed with an insulating protective layer.

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