A battery module including a liquid cooling structure

Abstract

The present invention discloses a battery module including a liquid cooling structure, including a shell and a battery cell and a liquid cooling structure arranged inside the shell. Two pole ears are arranged on one side of the battery cell, and two current collectors are fixed on the upper surfaces of the two current collectors and electrically connected thereto. The liquid cooling structure includes a liquid cooling profile with a water flow channel arranged inside and two liquid cooling pipe heads arranged at both ends of the liquid cooling profile and used to connect the water flow channel and the external cooling water path. Insulating heat sinks are respectively attached to the upper surfaces of the two pole ears, and the bottom surface of the liquid cooling profile fits the upper surface of the insulating heat sink. The present invention adopts liquid cooling to dissipate heat from the pole ears of the battery cell module, directly targeting the heat source. Compared with traditional air cooling and water cooling, the heat dissipation efficiency and heat dissipation effect are significantly improved, and the system safety and stability are high; the liquid cooling structure is built into the shell, which greatly reduces the risk of falling off and damage, and does not require an additional installation process, so disassembly and maintenance are more convenient and quick.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery module including a liquid cooling structure. Background Art

[0002] When the battery system is running, a large current passes through each battery module, and heat is generated due to the internal resistance of the module, especially at the connection of the battery module tabs. If the heat cannot be dissipated in time, it will seriously affect the battery performance and even cause thermal runaway of the system, resulting in safety risks. Traditional battery systems mostly use air cooling, which has low heat dissipation efficiency and poor heat dissipation effect. Especially under high-rate operation, air cooling cannot meet the heat dissipation requirements. The pipes of existing liquid cooling devices are mostly laid outside the entire battery module or in the gaps between the battery modules. They cannot effectively conduct the heat generated at the battery module tabs, and there will be problems with uneven heat dissipation, causing serious temperature differences in the battery modules, resulting in reduced battery performance and even safety hazards. Summary of the invention

[0003] In view of the technical problems raised in the background technology, the purpose of the present invention is to provide a battery module including a liquid cooling structure with good heat dissipation effect and excellent safety, which can directly dissipate the heat from the tabs of the battery module and improve the overall performance of the battery module.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A battery module including a liquid cooling structure comprises a shell, a battery cell and a liquid cooling structure arranged inside the shell. Two pole ears are arranged on one side of the battery cell, and two current collectors are fixedly arranged on the side close to the pole ears inside the shell, and the two pole ears are respectively fixed on the upper surfaces of the two current collectors and electrically connected thereto. The liquid cooling structure comprises a liquid cooling profile having a water flow channel inside and two liquid cooling pipe heads arranged at both ends of the liquid cooling profile and used to connect the water flow channel and the external cooling water circuit, and insulating heat sinks are respectively attached to the upper surfaces of the two pole ears, and the bottom surface of the liquid cooling profile is in contact with the upper surface of the insulating heat sink.

[0006] Furthermore, in order to facilitate the fixation of the collector bar, two pole lug brackets are fixedly provided inside the shell on one side close to the pole lug, and the two collector bars are fixedly mounted on the pole lug brackets respectively.

[0007] Preferably, in order to achieve better installation, fitting and positioning and fixing, the top and the bottom of the pole lug support are respectively provided with limiting steps at the end away from the pole lug for abutting against the edge of the shell.

[0008] Preferably, in order to make the installation of the pole ear bracket more stable and firm, the inner sides of the two pole ear brackets are locked and fixed to each other by locking buckles, and the outer sides of the two pole ear brackets are respectively provided with lugs extending in the upper and lower directions, and the two sides of the shell are respectively provided with limit slots for the lugs to be inserted.

[0009] Preferably, in order to achieve better insulation and flame retardant effects and also to play the role of bonding, fixing and buffering, a piece of EVA foam is fixedly provided on the upper part of the two-pole bracket just above the two-pole ears.

[0010] Preferably, in order to make the tab support more stably fixed inside the shell, the upper and lower sides of the middle position of the tab support are respectively recessed inward to form two grooves, and the shell is bent at positions corresponding to the grooves to form convex bumps for being inserted into the grooves.

[0011] Furthermore, the shell comprises an upper shell and a lower shell which are buckled together, and a bottom of the upper shell and a top of the lower shell are respectively provided with a receiving groove for receiving the battery cell.

[0012] Among them, in order to make the cooperation between the upper and lower shells more stable, a plurality of first buckles and first protrusions are arranged at the edge of the upper shell, and the first buckles and first protrusions are arranged alternately in sequence, and a plurality of second protrusions and second buckles are provided at corresponding positions on the edge of the lower shell, which are used to snap into the first buckles and the first protrusions respectively.

[0013] Among them, in order to make the fit between the upper and lower shells more stable, the top of the lower shell is provided with a plurality of first protrusions on the side away from the pole ear, and the bottom of the upper shell is provided with a plurality of second protrusions at positions corresponding to the first protrusions, the upper surface of the first protrusion and the lower surface of the second protrusion are fitted together, and rivet holes are respectively opened at relative positions of the first protrusion and the second protrusion.

[0014] Preferably, the outer surfaces of the upper shell and the lower shell are respectively provided with reinforcing ribs. Providing the reinforcing ribs can further increase the structural strength of the entire module, reduce the deformation of the module in the vertical direction, enhance the earthquake and shock resistance, and improve the operational stability of the system.

[0015] Furthermore, a fixing ear for fixing the battery module on the side beam of the battery cabinet is detachably mounted on the left and right sides of the front end of the shell.

[0016] Preferably, in order to achieve a better heat dissipation effect, the insulating heat sink is a silicone heat sink.

[0017] The present invention has the following beneficial effects: providing a battery module including a liquid cooling structure, using liquid cooling to dissipate the heat from the pole ears of the battery cell module, directly targeting the heat source, and significantly improving the heat dissipation efficiency and heat dissipation effect compared with traditional air cooling and water cooling, and improving the safety and stability of the system; the liquid cooling structure is built into the shell, which greatly reduces the risk of falling off and breakage, and does not require an additional installation process, and disassembly and maintenance are more convenient and quick; by respectively arranging reinforcing ribs on the outer surfaces of the upper shell and the lower shell, the overall structural strength of the module can be further increased, the deformation of the module in the vertical direction can be reduced, the seismic and impact resistance can be improved, and the system operation stability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 for Figure 1 Exploded view of parts.

[0020] Figure 3 for Figure 1 The schematic diagram of the structure behind the two fixed ears is hidden.

[0021] Figure 4 for Figure 3 A partial enlarged schematic diagram of part A.

[0022] Figure 5 for Figure 3 Top view of the .

[0023] Figure 6 for Figure 5 Schematic diagram of the cross section along the AA direction.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the pole ear bracket.

[0025] Explanation of the main component symbols: 1. Shell; 10. Receiving groove; 101. Limiting slot; 102. Bump; 103. Reinforcing rib; 104. Fixing ear; 11. Upper shell; 111. First buckle; 112. First buckle; 113. Second bump; 12. Lower shell; 121. Second buckle; 122. Second buckle; 123. First bump; 2. Battery cell; 20. Tab; 21. Tab bracket; 211. Limiting step; 212. Tab; 213. EVA foam; 214. Groove; 22. Collector; 30. Water flow channel; 31. Liquid cooling profile; 32. Liquid cooling pipe head; 4. U-shaped lock; 5. Silicone heat sink. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1-7As shown, a battery module including a liquid cooling structure includes a housing 1 and a battery cell 2 and a liquid cooling structure arranged inside the housing 1. Two pole tabs 20 are arranged on one side of the battery cell 2, and a pole tab support 21 is fixedly arranged on the side close to the pole tab 20 inside the housing 1, and current collectors 22 are fixedly arranged on the two pole tab supports 21, and the two pole tabs 20 are respectively fixed on the upper surfaces of the two current collectors 22 and electrically connected thereto.

[0028] Preferably, the top and bottom of the pole lug bracket 21 are respectively provided with a limiting step 211 for contacting with the edge of the shell 1 at the end away from the pole lug 20. Preferably, the inner sides of the two pole lug brackets 21 are mutually locked and fixed by U-shaped lock buckles 4, and the outer surfaces of the two pole lug brackets 21 are respectively provided with lugs 212 extending in the upper and lower directions, and the two sides of the shell 1 are respectively provided with limiting slots 101 for the lugs 212 to be inserted into. Preferably, a piece of EVA foam 213 is fixed to the upper part of the two pole lug brackets 21 just above the two pole lugs 20. Preferably, the upper and lower sides of the middle position of the pole lug bracket 21 are respectively recessed inward to form two grooves 214, and the shell 1 is bent at the position corresponding to the groove 214 to form a convex bump 102 for inserting into the groove 214.

[0029] The liquid cooling structure includes a liquid cooling profile 31 with a water flow channel 30 inside and two liquid cooling pipe heads 32 provided at both ends of the liquid cooling profile 31 and used to connect the water flow channel 30 and the external cooling water path. One end of the liquid cooling pipe head 32 is embedded in the pole ear bracket 21 and connected to the water flow channel 30, and the other end passes out of the pole ear bracket 21. The upper surfaces of the two pole ears 20 are respectively attached with silicone heat sinks 5, and the bottom surface of the liquid cooling profile 31 is in contact with the upper surface of the silicone heat sink 5.

[0030] The housing 1 includes an upper shell 11 and a lower shell 12 that are buckled together. The bottom of the upper shell 11 and the top of the lower shell 12 are respectively provided with a receiving groove 10 for accommodating the battery cell 2. A plurality of first buckles 111 and first buckles 112 are provided at the edge of the upper shell 11. The first buckles 111 and the first buckles 112 are alternately arranged in sequence. A plurality of second buckles 121 and second buckles 122 are respectively provided at the corresponding positions of the edge of the lower shell 12 for buckling with the first buckles 111 and the first buckles 112. A plurality of first protrusions 123 are provided at the top of the lower shell 12 on the side away from the pole ear 20. A plurality of second protrusions 113 are provided at the bottom of the upper shell 11 at the positions corresponding to the first protrusions 123. The upper surface of the first protrusion 123 and the lower surface of the second protrusion 113 are in contact with each other. Riveting holes are respectively provided at the positions opposite to the first protrusion 123 and the second protrusion 113. Preferably, the outer surfaces of the upper shell 11 and the lower shell 12 are respectively provided with reinforcing ribs 103. A fixing ear 104 for fixing the battery module on the side beam of the battery cabinet is detachably mounted on the left and right sides of the front end of the shell 1.

[0031] In the above structure of the present invention, liquid cooling is used to directly dissipate the heat of the pole ear 20, which has high heat dissipation efficiency and good heat dissipation effect, greatly improving the safety and stability of the entire system; the liquid cooling structure is built into the shell 1, which greatly reduces the risk of falling off and breakage, and does not require additional installation process, and disassembly and maintenance are more convenient and quick, which is suitable for popularization and use.

[0032] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A battery module including a liquid cooling structure, characterized in that: It comprises a shell, a battery cell and a liquid cooling structure arranged inside the shell, two pole ears are arranged on one side of the battery cell, two current collectors are fixedly arranged on the side close to the pole ears inside the shell, the two pole ears are respectively fixed on the upper surfaces of the two current collectors and electrically connected thereto, the liquid cooling structure comprises a liquid cooling profile with a water flow channel arranged inside and two liquid cooling pipe heads arranged at both ends of the liquid cooling profile and used to connect the water flow channel and the external cooling water path, the upper surfaces of the two pole ears are respectively attached with insulating heat sinks, and the bottom surface of the liquid cooling profile is in contact with the upper surface of the insulating heat sink; Two pole ear brackets are fixedly arranged inside the shell on one side close to the pole ear, and two current collectors are respectively fixedly mounted on the pole ear brackets; The top and bottom of the pole lug support are respectively provided with limiting steps at the end away from the pole lug for abutting against the edge of the shell; The inner sides of the two pole ear brackets are mutually locked and fixed by lock buckles, and the outer sides of the two pole ear brackets are respectively provided with lugs extending in two directions, and the two sides of the shell are respectively provided with limit slots for the lugs to be inserted into; A piece of EVA foam is fixedly arranged on the upper part of the two-pole bracket just above the two-pole ears; The upper and lower sides of the middle position of the pole ear bracket are respectively recessed inward to form two grooves, and the shell is bent at positions corresponding to the grooves to form a convex bump for being inserted into the grooves; The shell comprises an upper shell and a lower shell which are buckled together, and the bottom of the upper shell and the top of the lower shell are respectively provided with accommodating grooves for accommodating the battery core.

2. A battery module comprising a liquid cooling structure as claimed in claim 1, characterized in that: A plurality of first buckles and first protrusions are arranged at the edge of the upper shell, and the first buckles and first protrusions are arranged alternately in sequence. A plurality of second protrusions and second buckles are arranged at corresponding positions on the edge of the lower shell, which are used to be respectively engaged with the first buckles and the first protrusions.

3. A battery module comprising a liquid cooling structure as claimed in claim 2, characterized in that: The top of the lower shell is provided with a plurality of first protrusions on a side away from the pole ear, and the bottom of the upper shell is provided with a plurality of second protrusions at positions corresponding to the first protrusions, the upper surface of the first protrusion and the lower surface of the second protrusion are in contact with each other, and rivet holes are respectively opened at positions opposite to each other, and reinforcing ribs are respectively provided on the outer surfaces of the upper shell and the lower shell.

4. A battery module comprising a liquid cooling structure as claimed in claim 3, characterized in that: A fixing ear for fixing the battery module on the side beam of the battery cabinet is detachably mounted on the left and right sides of the front end of the shell, and the insulating heat sink is a silicone heat sink.

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