Immersed liquid cooling energy storage battery box

Abstract

The utility model discloses an immersed liquid-cooled energy storage battery box, which comprises a battery box, a liquid storage tank and a liquid storage tank, the battery module comprises a plurality of battery cells; the flow guide assembly comprises a bottom flow equalizing plate and a plurality of flow guide heat dissipation plates, the bottom flow equalizing plate divides the cavity into a bottom liquid inlet cavity and a cooling cavity, the liquid inlet is communicated with the bottom liquid inlet cavity, the bottom flow equalizing plate is provided with a plurality of first liquid outlet small holes, a plurality of cooling channels are formed in the flow guide heat dissipation plates, and the first liquid outlet small holes are communicated with the cooling cavity. The plurality of battery cells and the plurality of flow guide heat dissipation plates are arranged at intervals, one end of the cooling channel is communicated with the first small liquid outlet hole, an overflow groove is formed in the side wall of the box body, and the liquid outlet is communicated with the overflow groove. According to the utility model, the cooling liquid can be guided, so that the cooling liquid flows out from each guide heat dissipation plate, each battery cell can be cooled, and further, the heat dissipation of each battery cell can be uniform, the temperature difference of the battery cells can be reduced, and the safety of equipment can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling devices, in particular to an immersion-type liquid-cooled energy storage battery box. Background Art

[0002] Electrochemical energy storage is a technology and practice that uses chemical batteries to store electrical energy and release it when needed. Chemical batteries can be categorized as lithium-ion batteries, lead-acid batteries, flow batteries, and sodium-sulfur batteries. Lithium-ion batteries have high temperature requirements for their capacity and cycle life, making temperature control particularly important.

[0003] Existing lithium-ion battery cooling methods include air cooling, cold plate cooling, and immersion cooling. Air cooling uses air as the cooling medium, utilizing convection heat transfer to reduce battery temperature. Air cooling offers advantages such as simple structure, easy maintenance, and low cost. Cold plate cooling uses a cold plate to remove heat generated by the battery, which is then cooled using a liquid as the cooling medium. Convection heat transfer removes the heat from the cold plate. Commonly used cooling media include water, ethylene glycol water solution, and air conditioning refrigerant. Immersion cooling directly immerses the battery pack in a special heat-conducting fluid, removing the heat generated by the battery through conduction and convection.

[0004] The existing immersion cooling device includes a battery box and a liquid cooling unit. Multiple battery cells are installed in the battery box. The battery box is connected to the liquid cooling unit through a liquid inlet pipe and a liquid outlet pipe. The liquid cooling unit is used to provide coolant and recover coolant, and cool the recovered coolant. The coolant of the liquid cooling unit enters the battery box through the liquid inlet pipe, so that the multiple battery cells in the battery box are immersed in the coolant. Then, the coolant in the battery box absorbs the heat of the battery cells and flows back to the liquid cooling unit through the liquid outlet pipe for re-cooling.

[0005] However, the existing battery box cannot guide the coolant entering the battery box, resulting in a large temperature difference of the coolant in the battery box, thereby causing uneven heat dissipation among multiple battery cells in the battery box, affecting the heat dissipation performance of the battery. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, the utility model provides an immersion liquid-cooled energy storage battery box, which can guide the coolant so that the coolant flows out from each guide heat dissipation plate, thereby cooling each battery cell. The flowing coolant absorbs the heat of the battery cell and then flows back to the liquid cooling unit, thereby enabling each battery cell to dissipate heat evenly, reducing the temperature difference of the battery cell and improving the safety of the equipment.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] 18. The liquid-cooled heat dissipation device of claim 17, wherein the cooling fan is located adjacent to the cooling fan, and the cooling fan is located adjacent to the cooling fan. The cooling fan is located adjacent to the cooling fan.

[0009] As a further improvement of the above technical solution, the edge of the bottom flow equalizing plate is folded downward to form a side panel, and the side panel is installed on the bottom wall of the box body. The bottom wall of the box body, the side panel and the bottom flow equalizing plate are combined to form the bottom liquid inlet cavity. A through hole is opened on one side of the side panel, and the liquid inlet is connected to the through hole through a liquid inlet pipe.

[0010] As a further improvement of the above technical solution, the liquid inlet pipe extends to the bottom liquid inlet cavity, and a portion of the liquid inlet pipe located in the bottom liquid inlet cavity is provided with a plurality of diversion holes.

[0011] As a further improvement of the above technical solution, a plurality of second liquid outlet holes are provided on a side of the side panel away from the through hole.

[0012] As a further improvement of the above technical solution, mounting protrusions are provided on both sides of the top of the bottom current equalizing plate. The mounting protrusions are long and strip-shaped, and several battery limiting side plates are installed in sequence along the length direction of the mounting protrusions. A clamp is enclosed between the two relatively arranged battery limiting side plates.

[0013] As a further improvement of the above technical solution, an exhaust pipe is further provided on one side of the box body, one end of the exhaust pipe is located outside the box body, and the other end of the exhaust pipe extends to the top of the overflow tank.

[0014] As a further improvement of the above technical solution, a blocking cover is provided at one end of the exhaust pipe located outside the box body, and the blocking cover is connected to the exhaust pipe through a threaded connection.

[0015] As a further improvement of the above technical solution, a flange is provided on the top edge of the box body, a frame is provided on the edge of the cover plate, and the flange and the frame are connected by a plurality of locking members.

[0016] As a further improvement of the above technical solution, a plurality of first mounting holes are provided on the flange, a plurality of second mounting holes are provided on the frame, and the locking member includes a bolt and a nut, and the bolt passes through the first mounting hole and the second mounting hole and is screwed into the nut.

[0017] As a further improvement of the above technical solution, at least one of the flange and the frame is provided with a sealing groove, and a sealing ring is installed in the sealing groove.

[0018] The beneficial effects of the present invention are as follows: the present invention provides an immersion liquid-cooled energy storage battery box, which is provided with a bottom flow equalizing plate and a plurality of guide heat dissipation plates, and a plurality of battery cells are arranged at intervals from the plurality of guide heat dissipation plates. The cooling liquid in the liquid cooling unit enters the bottom liquid inlet cavity from the liquid inlet through a pipeline, and then flows into the cooling channels of the plurality of guide heat dissipation plates through a plurality of first liquid outlet holes on the bottom flow equalizing plate. At this time, the heat of the battery cells is transferred to the guide heat dissipation plates. After the cooling liquid absorbs the heat transferred from the battery cells, the cooling liquid flows into the overflow groove along the top of the overflow groove, and finally flows back to the liquid cooling unit from the liquid outlet through the liquid outlet pipe. In this way, the cooling liquid can be guided to flow out from each guide heat dissipation plate, and each battery cell can be cooled. After absorbing the heat of the battery cell, the flowing cooling liquid flows back to the liquid cooling unit, and thus, the heat dissipation of each battery cell can be uniform, the temperature difference of the battery cell can be reduced, and the safety of the equipment can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural diagram provided by an example of the utility model;

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure with the middle cover plate opened;

[0022] Figure 3 yes Figure 2 Schematic diagram of the local structure in;

[0023] Figure 4 yes Figure 3 sectional view of

[0024] Figure 5 yes Figure 3 Schematic diagram of the structure of the combination of the bottom wall of the middle box and the bottom flow equalizing plate;

[0025] Figure 6 yes Figure 5 Schematic diagram of the structure of the liquid inlet pipe;

[0026] Figure 7 yes Figure 4 Enlarged view of point A in the middle;

[0027] Figure 8 yes Figure 4 Enlarged view of point B in the middle.

[0028] Reference numerals: 1-battery box, 11-box body, 12-cover plate, 13-overflow trough, 14-liquid inlet pipe, 15-liquid outlet pipe, 16-exhaust pipe, 17-blocking cover, 111-flange, 121-frame, 122-locking member, 141-diverter hole, 1111-first mounting hole, 1112-sealing groove, 1113-sealing ring, 1211-second mounting hole;

[0029] 2-battery cells;

[0030] 3-flow guide assembly, 31-bottom equalizing plate, 32-flow guide heat dissipation plate, 33-side panel, 34-battery limiting side panel, 35-clamp, 311-first liquid outlet hole, 312-mounting protrusion, 321-cooling channel, 331-second liquid outlet hole. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present invention can be combined interactively without conflicting with each other.

[0032] Reference Figures 1 to 4 An example of the present invention provides an immersion liquid-cooled energy storage battery box 1, including a battery box 1, a battery module arranged in the battery box 1 and a guide component 3.

[0033] The battery box 1 includes a box body 11 and a cover plate 12 covering the top of the box body 11 . The box body 11 and the cover plate 12 enclose a chamber. The box body 11 is provided with a liquid inlet and a liquid outlet.

[0034] Furthermore, the battery module includes a plurality of battery cells 2, which are connected in series and distributed in a rectangular array. A positive terminal 21 and a negative terminal 22 are provided on one side of the box body 11. The positive terminal 21 is connected to the positive pole of the battery cell 2, and the negative terminal 22 is connected to the negative pole of the battery cell 2.

[0035] Reference Figure 3 、 Figure 4 、 Figure 5 and Figure 7 Structurally, the flow guide component 3 includes a bottom flow equalizing plate 31 and several flow guide heat dissipation plates 32. The bottom flow equalizing plate 31 divides the chamber into a bottom liquid inlet chamber and a cooling chamber. The liquid inlet is connected to the bottom liquid inlet chamber. The bottom flow equalizing plate 31 is provided with several first liquid outlet holes 311. The flow guide heat dissipation plate 32 is provided with several cooling channels 321. Several flow guide heat dissipation plates 32 are distributed in a rectangular array on the bottom flow equalizing plate 31. Several battery cells 2 are arranged at intervals with several flow guide heat dissipation plates 32. One end of the cooling channel 321 is connected to the first liquid outlet hole 311, and the other end of the cooling channel 321 is connected to the cooling chamber. An overflow groove 13 is provided on the side wall of the box body 11. The liquid outlet is connected to the overflow groove 13, and the liquid outlet is connected to the liquid outlet pipe 15.

[0036] The coolant in the liquid cooling unit enters the bottom liquid inlet cavity through the pipeline from the liquid inlet, and then flows into the cooling channels 321 through the first liquid outlet holes 311, and then flows into the cooling cavity from the other end of the cooling channel 321, so that the coolant fills the box 11, and the battery cells 2 are immersed in the coolant, so that each battery cell 2 is isolated from the air, avoiding the risk of thermal runaway and fire of the battery cell 2. At the same time, the heat of the battery cell 2 is transferred to the heat guide plate 32, and the coolant absorbs the heat transferred from the battery cell 2. After absorbing the heat from the battery cell 2, the coolant flows into the overflow groove 13 along the top of the overflow groove 13, and finally flows back to the liquid cooling unit from the liquid outlet through the liquid outlet pipe 15, forming a coolant cycle, thereby being able to guide the coolant so that the coolant flows out from each guide heat dissipation plate 32, and each battery cell 2 can be cooled. The flowing coolant flows back to the liquid cooling unit after absorbing the heat of the battery cell 2, and then, each battery cell 2 can dissipate heat evenly, reduce the temperature difference of the battery cell 2, and improve the safety of the equipment.

[0037] Reference Figure 4 、 Figure 5 and Figure 6 In some preferred embodiments, the edge of the bottom flow equalizing plate 31 is folded downward to form a side panel 33, and the side panel 33 is installed on the bottom wall of the box body 11. The bottom wall of the box body 11, the side panel 33 and the bottom flow equalizing plate 31 together form a bottom liquid inlet cavity. A through hole is opened on one side of the side panel 33, and the liquid inlet and the through hole are connected through the liquid inlet pipe 14, thereby facilitating the installation of the bottom flow equalizing plate 31.

[0038] Furthermore, the liquid inlet pipe 14 extends to the bottom liquid inlet cavity, and the portion of the liquid inlet pipe 14 located in the bottom liquid inlet cavity is provided with a plurality of diversion holes 141, and the coolant in the liquid inlet pipe 14 flows out from the plurality of diversion holes 141 respectively, thereby enabling the coolant in the liquid inlet pipe 14 to flow evenly to various positions in the bottom liquid inlet cavity, thereby reducing the temperature difference between the coolant flowing out of each first liquid outlet hole 311, and ensuring uniform heat dissipation of each battery cell 2.

[0039] Furthermore, a plurality of second liquid outlet holes 331 are provided on the side of the side panel 33 away from the through hole. The coolant flowing out of the plurality of second liquid outlet holes 331 flows along the side wall of the box body 11 to the top, thereby increasing the fluidity of the coolant in the box body 11, making the coolant in the box body 11 heated evenly, and improving the stability of the overall equipment.

[0040] In some preferred embodiments, mounting protrusions 312 are provided on both sides of the top of the bottom current equalizing plate 31. The mounting protrusions 312 are in the shape of long strips. Several battery limiting side plates 34 are installed in sequence along the length direction of the mounting protrusions 312. A clamp 35 is enclosed between the two relatively arranged battery limiting side plates 34. Several positions for accommodating the battery cells 2 are formed between the two battery limiting side plates 34, the clamp 35 and the several heat conduction plates 32, thereby facilitating the installation and fastening of the battery cells 2, making the sides of the battery cells 2 close to the heat conduction plates 32, and improving the heat transfer efficiency between the battery cells 2 and the heat conduction plates 32.

[0041] Reference Figure 3 and Figure 4 In some preferred embodiments, an exhaust pipe 16 is further provided on one side of the box body 11, one end of the exhaust pipe 16 is located outside the box body 11, and the other end of the exhaust pipe 16 extends to the top of the overflow tank 13, so that the air inside the battery box 1 can be connected with the air outside the battery box 1, so that the air pressure inside the battery box 1 is the same as the air pressure outside the battery box 1, thereby avoiding the phenomenon of seal failure and coolant leakage caused by excessive pressure in the battery box 1, and further improving the safety of the overall equipment.

[0042] Furthermore, a sealing cover 17 is provided at one end of the exhaust pipe 16 located outside the box body 11. The sealing cover 17 is connected to the exhaust pipe 16 by a thread, so that the exhaust pipe 16 can be closed or opened, which is convenient for controlling the air pressure in the battery box 1.

[0043] Reference Figure 2 、 Figure 4 and Figure 8 In some preferred embodiments, a flange 111 is provided on the top edge of the box body 11, and a frame 121 is provided on the edge of the cover plate 12. The flange 111 and the frame 121 are connected by a plurality of locking members 122, thereby increasing the contact area between the box body 11 and the cover plate 12 and facilitating the connection of the locking members 122.

[0044] Specifically, a plurality of first mounting holes 1111 are opened on the flange 111, a plurality of second mounting holes 1211 are opened on the frame 121, and the locking member 122 includes a bolt and a nut. The bolt passes through the first mounting hole 1111 and the second mounting hole 1211 and is screwed together with the nut, thereby facilitating the locking between the box body 11 and the box cover, and the locking is firm.

[0045] Furthermore, at least one of the flange 111 and the frame 121 is provided with a sealing groove 1112 , and a sealing ring 1113 is installed in the sealing groove 1112 , thereby improving the sealing between the box body 11 and the box cover and avoiding the leakage of the coolant.

[0046] It should be noted that the sealing groove 1112 can be provided only on the flange 111 , or only on the frame 121 , or even on both the flange 111 and the frame 121 .

[0047] In some preferred embodiments, a BMU communication terminal 18 is further provided on the box body 11. The BMU communication terminal 18 is connected to an external monitoring device, so that the performance inside the battery box 1 can be monitored in real time, which facilitates the management of the battery.

[0048] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An immersion liquid-cooled energy storage battery box, characterized in that: include: The battery box includes a box body and a cover plate covering the top of the box body, wherein the box body and the cover plate enclose a chamber, and the box body is provided with a liquid inlet and a liquid outlet; A battery module is disposed in the box and includes a plurality of battery cells, wherein the battery cells are distributed in a rectangular array; The flow guide assembly includes a bottom flow equalizing plate and several flow guide heat sinks. The bottom flow equalizing plate divides the chamber into a bottom liquid inlet chamber and a cooling chamber. The liquid inlet is connected to the bottom liquid inlet chamber. The bottom flow equalizing plate is provided with several first liquid outlet holes. Several cooling channels are arranged inside the flow guide heat sink. Several flow guide heat sinks are distributed on the bottom flow equalizing plate in a rectangular array. Several battery cells are arranged at intervals with several flow guide heat sinks. One end of the cooling channel is connected to the first liquid outlet hole, and the other end of the cooling channel is connected to the cooling chamber. An overflow groove is provided on the side wall of the box body, and the liquid outlet is connected to the overflow groove.

2. The immersion liquid-cooled energy storage battery box according to claim 1, characterized in that: The edge of the bottom flow equalizing plate is folded downward to form a side panel, and the side panel is installed on the bottom wall of the box body. The bottom wall of the box body, the side panel and the bottom flow equalizing plate together form the bottom liquid inlet cavity. A through hole is opened on one side of the side panel, and the liquid inlet is connected to the through hole through a liquid inlet pipe.

3. The immersion liquid-cooled energy storage battery box according to claim 2, characterized in that: The liquid inlet pipe extends to the bottom liquid inlet cavity, and a portion of the liquid inlet pipe located in the bottom liquid inlet cavity is provided with a plurality of diversion holes.

4. The immersion liquid-cooled energy storage battery box according to claim 2, characterized in that: A plurality of second liquid outlet holes are formed on a side of the side panel away from the through hole.

5. The immersion liquid-cooled energy storage battery box according to claim 1, characterized in that: Both sides of the top of the bottom current equalizing plate are provided with mounting protrusions, and the mounting protrusions are in the shape of long strips. Several battery limiting side plates are installed in sequence along the length direction of the mounting protrusions, and a clamp is enclosed between the two oppositely arranged battery limiting side plates.

6. The immersion liquid-cooled energy storage battery box according to claim 1, characterized in that: An exhaust pipe is also provided on one side of the box body, one end of the exhaust pipe is located outside the box body, and the other end of the exhaust pipe extends to the top of the overflow tank.

7. The immersion liquid-cooled energy storage battery box according to claim 6, characterized in that: A blocking cover is provided at one end of the exhaust pipe located outside the box body, and the blocking cover is connected to the exhaust pipe through a threaded connection.

8. The immersion liquid-cooled energy storage battery box according to claim 1, characterized in that: The top edge of the box body is provided with a flange, the edge of the cover plate is provided with a frame, and the flange and the frame are connected by a plurality of locking pieces.

9. The immersion liquid-cooled energy storage battery box according to claim 8, characterized in that: The flange is provided with a plurality of first mounting holes, the frame is provided with a plurality of second mounting holes, the locking member comprises a bolt and a nut, and the bolt passes through the first mounting hole and the second mounting hole and is screwed together with the nut.

10. The immersion liquid-cooled energy storage battery box according to claim 8, characterized in that: At least one of the flange and the frame is provided with a sealing groove, and a sealing ring is installed in the sealing groove.

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