A new type of liquid-cooled battery box for energy storage

Abstract

The utility model relates to a kind of new liquid-cooled battery box for energy storage, which has high production efficiency and high yield, and the liquid-cooled bottom plate has good cooling balance, high structural strength and light weight. The upper end surface of the liquid-cooled bottom plate in the battery box main body is provided with a box frame composed of front side plate, rear side plate, left side plate and right side plate. The liquid-cooled bottom plate includes reinforcing plate, reinforcing frame, flow channel plate, cover plate, front pressing strip, middle pressing strip and rear pressing strip. The left side surface of the front pressing strip, the left side surface of the middle pressing strip and the left side surface of the rear pressing strip on the reinforcing frame are flush to form the left side plate brazing positioning surface. The right side surface of the front pressing strip, the right side surface of the middle pressing strip and the right side surface of the rear pressing strip are flush to form the right side plate brazing positioning surface. The outer side surface of the rear pressing strip is the rear side plate brazing positioning surface. The battery box main body semi-finished product is brazed to form the battery box main body. The new liquid-cooled battery box for energy storage has high production efficiency and high yield.

Description

Technical Field

[0001] This utility model belongs to the field of manufacturing technology of liquid-cooled battery boxes for energy storage, and specifically relates to a novel liquid-cooled battery box for energy storage. Background Technology

[0002] Liquid-cooled battery boxes are important components of energy storage devices. Previous liquid-cooled battery boxes used a combination of flat liquid-cooling plates and deep covers, such as CN 114824628 75, entitled "A Liquid-Cooled Battery Box for Energy Storage". This box includes a housing and several battery cells evenly arranged inside the housing. Adjacent cells in each row are connected by thermally conductive adhesive. Side plates are provided between adjacent cells in each row and on both sides of the housing. Each side plate has a through hole, and a reinforcing sleeve is installed inside the through hole. A lead screw is installed inside the reinforcing sleeve. The housing includes a lower housing and an upper cover located on the upper part of the lower housing. End plates are provided at both the front and rear ends of the housing. Insulating sheets are provided on the inner side of each end plate, and the end plates are connected to the insulating sheets by thermally conductive adhesive. Several lead screw connection holes are provided on the end plates, and the end plates are connected to the side plates by the lead screws. Liquid-cooling channels are provided on the lower bottom plate of the housing. A maintenance cover is located at the center of the front side of the enclosure cover. Positive and negative output terminals and a C75N communication port are located on the left and right sides of the enclosure cover, respectively. Both the positive and negative output terminals and the C75N communication port are bolted to the top cover. A slave control bracket and slave control assembly are located inside the maintenance cover. The positive and negative output terminals on both sides are different colors. The positive and negative terminals of two adjacent cells in each row are connected by a series metal busbar. Series metal busbars are located on the upper front and rear sides of the enclosure. Cell units composed of cells in each row are electrically connected through these busbars. The two ends of the series metal busbar on the front side are connected to the C75N communication port on one side of the enclosure, which is connected to the slave control's C75N communication port. The cells are either square-shell cells or pouch cells with both positive and negative output terminals at the top. Several holes are provided on the end plates for vertical fixing to the enclosure. The side plates are made of plastic or extruded aluminum coated with insulating material. However, the liquid-cooled battery box with this flat liquid cooling plate combined with a deep cover is relatively large. In order to accommodate as many batteries as possible within the limited battery compartment volume, the industry currently adopts a tall box solution (battery box body and cover). The liquid-cooled battery box with the tall box solution can save 20-30mm of width space compared with the liquid-cooled battery box with the flat liquid cooling plate combined with a deep cover solution. That is, the liquid-cooled battery box with the current tall box solution is more compact and smaller in size than the liquid-cooled battery box with the flat liquid cooling plate combined with a deep cover solution.

[0003] However, in order to meet the IP waterproof requirements of the liquid-cooled battery box in the high-cabinet design, the four side panels of the box frame and the liquid-cooled base plate in the high-cabinet design must be fully welded together by electric welding. The amount of electric welding is huge, and the yield rate of sealing welding is low. Leaking boxes need to be repaired by welding multiple times, and the labor and material costs are very high. In addition, the liquid-cooled base plate is made by aluminum profile friction stir welding. However, due to the process limitations, the fluid circuit in the liquid-cooled base plate can only adopt a half-inlet and half-outlet scheme. The flow distribution between the sub-channels of the half-inlet and half-outlet fluid circuit is very uneven, resulting in poor uniformity of the cooling effect of the liquid-cooled base plate. Utility Model Content

[0004] Design objective: To design a novel liquid-cooled battery box for energy storage that not only has high production efficiency and high yield, but also good cooling uniformity of the liquid-cooled base plate, as well as high structural strength and light weight of the liquid-cooled base plate.

[0005] Design scheme: To achieve the above design objectives.

[0006] 1. The liquid-cooled base plate includes a reinforcing plate, a reinforcing frame, a flow channel plate, a cover plate, a front pressure strip, a middle pressure strip, and a rear pressure strip. A reinforcing frame is provided between the reinforcing plate and the cover plate. A flow channel plate is provided on the reinforcing frame and is located between the reinforcing plate and the cover plate. The upper surface of the cover plate has a front pressure strip, a middle pressure strip, and a rear pressure strip, which are arranged in parallel. The left sides of the front pressure strip, the middle pressure strip, and the rear pressure strip are flush to form a left side plate brazing positioning surface. The right sides of the front pressure strip, the middle pressure strip, and the rear pressure strip are flush to form a right side plate brazing positioning surface. The outer surface of the rear pressure strip is the rear side plate. The brazing positioning surface; after the reinforcing plate, reinforcing frame, flow channel plate, cover plate, front pressure strip, middle pressure strip and rear pressure strip are assembled into a liquid-cooled base plate semi-finished product, the box frame is placed on the upper end face of the cover plate, and the inner side of the left side plate of the box frame is in surface contact with the brazing positioning surface of the left side plate, the inner side of the right side plate of the box frame is in surface contact with the brazing positioning surface of the right side plate, and the inner side of the rear side plate of the box frame is in surface contact with the brazing positioning surface of the rear side plate. At this time, the liquid-cooled base plate semi-finished product and the box frame form the battery box body semi-finished product. The design of forming the battery box body semi-finished product by brazing (brazing in an atmosphere-protected furnace) is one of the technical features of this utility model.The purpose of this design is as follows: the liquid-cooled base plate includes a reinforcing plate, a reinforcing frame, a flow channel plate, a cover plate, a front pressure strip, a middle pressure strip, and a rear pressure strip. A reinforcing frame is provided between the reinforcing plate and the cover plate. A flow channel plate is provided on the reinforcing frame and is located between the reinforcing plate and the cover plate. The upper surface of the cover plate has a front pressure strip, a middle pressure strip, and a rear pressure strip, which are arranged in parallel. The left sides of the front pressure strip, the middle pressure strip, and the rear pressure strip are flush to form a brazing positioning surface for the left side plate. The right sides of the front pressure strip, the middle pressure strip, and the rear pressure strip are flush to form a... The battery box has a brazing positioning surface on the right side plate, and the outer side of the rear pressure strip is the brazing positioning surface of the rear side plate. After the reinforcing plate, reinforcing frame, flow channel plate, cover plate, front pressure strip, middle pressure strip, and rear pressure strip are assembled into a liquid-cooled base plate semi-finished product, the box frame is placed on the upper end face of the cover plate, and the inner side of the left side plate in the box frame is in surface contact with the brazing positioning surface of the left side plate, the inner side of the right side plate in the box frame is in surface contact with the brazing positioning surface of the right side plate, and the inner side of the rear side plate in the box frame is in surface contact with the brazing positioning surface of the rear side plate. At this time, the liquid-cooled base plate semi-finished product and the box frame form a battery box main body semi-finished product, and the battery box main body semi-finished product is formed by brazing. The battery box body is formed by: 1) assembling the reinforcing plate, reinforcing frame, flow channel plate, cover plate, front pressure strip, middle pressure strip, and rear pressure strip into a liquid-cooled base plate semi-finished product; 2) placing the box frame on the upper surface of the cover plate, ensuring that the inner side of the left side plate of the box frame is in surface contact with the brazed positioning surface of the left side plate, the inner side of the right side plate of the box frame is in surface contact with the brazed positioning surface of the right side plate, and the inner side of the rear side plate of the box frame is in surface contact with the brazed positioning surface of the rear side plate. At this point, the liquid-cooled base plate semi-finished product and the box frame form the battery box body semi-finished product. The battery box body semi-finished product is then brazed to form the battery box body. Because the battery box body is integrally brazed... This not only greatly improves the production efficiency of the battery box body and various new liquid-cooled battery boxes for energy storage, but also increases the yield of the battery box body and various new liquid-cooled battery boxes for energy storage; secondly, the left side of the front pressure strip, the left side of the middle pressure strip, and the left side of the rear pressure strip are flush to form a brazing positioning surface for the left side plate, and the right side of the front pressure strip, the right side of the middle pressure strip, and the right side of the rear pressure strip are flush to form a brazing positioning surface for the right side plate, and the outer side of the rear pressure strip is the brazing positioning surface for the rear side plate. This can improve the efficiency and effect of splicing the box frame and the semi-finished liquid-cooled base plate.

[0007] 2. The upper surface of the flow channel plate is provided with concave channels one, two, three, and four, arranged side by side. One side of the concave opening in concave channel one is provided with an outlet channel one, and the other side is provided with an inlet channel one. The inlet channel one is located closer to concave channel two. One side of the concave opening in concave channel two is provided with an outlet channel two, and the concave opening... On the other side, there is a second inlet channel, which is located near the first concave channel, and a second outlet channel is located near the third concave channel. The third concave channel has an outlet channel on one side of the recess and an inlet channel on the other side. The third inlet channel is located near the fourth concave channel, and the third outlet channel is located near the second concave channel. The fourth concave channel has an outlet channel on one side of the recess and an inlet channel on the other side. Fourth, the liquid inlet channel four is located on one side near the concave channel three. A main liquid outlet channel is provided on one side of the upper end face of the flow channel plate. Liquid outlet channels one, two, three, and four are respectively connected to the main liquid outlet channel. A liquid inlet groove is provided on the upper end face of the flow channel plate. The upper end face of the cover plate is provided with liquid inlet holes one, two, three, four, five, and six that penetrate the upper and lower ends of the cover plate. Liquid inlet hole one is connected to the liquid inlet channel one by one. The design of having two holes communicating with the liquid inlet channel, three holes communicating with the liquid inlet channel, four holes communicating with the liquid inlet channel, and five and six holes communicating with the liquid inlet groove respectively, and the upper end face of the cover plate having a liquid outlet hole that passes through the upper and lower ends of the cover plate and communicates with the main liquid outlet channel; and the lower end face of the front pressure strip having a liquid inlet groove that communicates with liquid inlet hole one, liquid inlet hole two, liquid inlet hole three, liquid inlet hole four, and liquid inlet hole five respectively, is the second technical feature of this utility model.The purpose of this design is as follows: Since the semi-finished liquid-cooled base plate is assembled from reinforcing plates, reinforcing frames, flow channel plates, cover plates, front pressure strips, middle pressure strips, and rear pressure strips, the multi-layered structure ensures the structural strength of the liquid-cooled base plate. Furthermore, the splicing structure of the reinforcing plates, reinforcing frames, flow channel plates, cover plates, front pressure strips, middle pressure strips, and rear pressure strips facilitates brazing of the liquid-cooled base plate. Simultaneously, the independent flow channel plates can form flow channels through stamping. Specifically, the flow channels are as follows: the upper surface of the flow channel plate is provided with concave channels one, two, three, and four, and concave channels one, two, three, and four... Four concave channels are arranged side by side. One side of the concave opening of the first concave channel has an outlet channel 1, and the other side of the concave opening has an inlet channel 1. The inlet channel 1 is located near the second concave channel. Similarly, one side of the concave opening of the second concave channel has an outlet channel 2, and the other side of the concave opening has an inlet channel 2. The inlet channel 2 is located near the first concave channel, and the outlet channel 2 is located near the third concave channel. The concave channel 3 has an outlet channel 3, and the other side of the concave opening has an inlet channel 3. The inlet channel 3 is located near the fourth concave channel, and the outlet channel 3 is located near the fourth concave channel. Channel 3 is located near the side of the concave channel 2. One side of the concave channel 4 has an outlet channel 4, and the other side of the concave channel 4 has an inlet channel 4. The inlet channel 4 is located near the side of the concave channel 3. A main outlet channel is located on one side of the upper end face of the flow channel plate. Outlet channels 1, 2, 3, and 4 are respectively connected to the main outlet channel. An inlet groove is located on the upper end face of the flow channel plate. The upper end face of the cover plate has inlet through holes 1, 2, 3, 4, 5, and 6 that penetrate the upper and lower ends of the cover plate. Inlet through hole 1 is connected to... The liquid inlet channel is connected to the first liquid inlet channel, the second liquid inlet hole is connected to the second liquid inlet channel, the third liquid inlet hole is connected to the third liquid inlet channel, the fourth liquid inlet hole is connected to the fourth liquid inlet channel, and the fifth and sixth liquid inlet holes are connected to the liquid inlet groove respectively. The upper end face of the cover plate is provided with a liquid outlet hole that runs through the upper and lower ends of the cover plate and is connected to the main liquid outlet channel. The lower end face of the front pressure strip is provided with a liquid inlet groove, which is connected to the first, second, third, fourth and fifth liquid inlet holes respectively. Due to the interactive design of the hot and cold flow channels in the flow channel formed by the stamping of the flow channel plate, and the design of no temperature difference in the inlet and outlet areas, the temperature uniformity of the liquid cooling base plate is greatly improved.

[0008] 3. The design that inlet channel 1, outlet channel 1, inlet channel 2, outlet channel 3, inlet channel 4, and outlet channel 4 are all arranged in parallel; and that the centers of inlet through-holes 1, 2, 3, and 4 are located on the same straight line, is the third technical feature of this utility model. The purpose of this design is that the inlet channel 1, outlet channel 1, inlet channel 2, outlet channel 3, outlet channel 4, and outlet channel 4 are all arranged in parallel; and that the centers of inlet through-holes 1, 2, 3, and 4 are located on the same straight line, greatly optimizes the flow channel structure, reducing production difficulty while ensuring effectiveness.

[0009] 4. The reinforcing frame is made of aluminum plate. When the reinforcing frame is placed on the reinforcing plate, the transverse stamping ribs and longitudinal stamping ribs are located inside the frame holes. The two inner wall surfaces in the frame holes along the length direction are in surface contact with the outer side surface of the corresponding longitudinal stamping rib, and the two inner wall surfaces in the width direction are in surface contact with the outer side surface of the corresponding outermost transverse stamping rib. The upper end surface of the transverse stamping rib is flush with the upper end surface of the longitudinal stamping rib. The flow channel plate is located on the reinforcing frame. The channel portion formed by stamping and recessing in the flow channel plate is located inside the frame holes. The lower end surface of the channel portion is in surface contact with the upper end surface of both the transverse and longitudinal stamping ribs. The lower end surface of the plate body portion in the flow channel plate is in surface contact with the upper end surface of the reinforcing frame. The cover plate is made of aluminum plate, and the lower end surface of the cover plate is in surface contact with the upper end surface of the plate body portion in the flow channel plate. The design that the front pressure strip, middle pressure strip, and rear pressure strip are all made of aluminum strips is the fourth technical feature of this utility model. The purpose of this design is as follows: the reinforcing plate is integrally stamped from an aluminum plate. The upper surface of the reinforcing plate has multiple horizontal stamping ribs arranged side-by-side. The upper surface of the reinforcing plate also has two parallel longitudinal stamping ribs located on either side of the horizontal stamping ribs. The spacing between the two longitudinal stamping ribs matches the width of the frame hole in the reinforcing frame. The spacing between the two outermost horizontal stamping ribs matches the length of the frame hole in the reinforcing frame. The reinforcing frame is made of aluminum plate. When the reinforcing frame is placed on the reinforcing plate, the horizontal and longitudinal stamping ribs are located within the frame hole. The two inner wall surfaces in the frame hole along the length direction are in full contact with the outer surface of the corresponding longitudinal stamping rib, and the two inner wall surfaces along the width direction are in full contact with the outer surface of the corresponding outermost horizontal stamping rib. The upper surface of the horizontal stamping rib is flush with the upper surface of the longitudinal stamping rib. The flow channel plate is located within the reinforcing frame. In the above, the channel portion formed by stamping and recessing in the flow channel plate is located within the frame hole, and the lower end face of the channel portion is in surface contact with the upper end face of the transverse stamping rib and the upper end face of the longitudinal stamping rib. The lower end face of the plate body portion in the flow channel plate is in surface contact with the upper end face of the reinforcing frame. The cover plate is made of aluminum plate, and the lower end face of the cover plate is in surface contact with the upper end face of the plate body portion in the flow channel plate. The front pressure strip, middle pressure strip, and rear pressure strip are all made of aluminum strip. Through the multi-layer structure of the liquid-cooled base plate and the design of the reinforcing rib structure formed by stamping the reinforcing plate and the flow channel plate (the flow channel formed by stamping the flow channel and the recessed flow channel form a reinforcing rib structure on the other side of the flow channel plate, and the reinforcing plate forms longitudinal stamping ribs and transverse stamping ribs), the overall strength and rigidity of the liquid-cooled base plate are greatly improved. At the same time, the all-aluminum material greatly reduces the overall weight of the battery box body and the new type of liquid-cooled battery box for energy storage, realizing the lightweighting of the battery box body and the new type of liquid-cooled battery box for energy storage.

[0010] 5. The lower port of the cover is provided with flange 1 around its four sides, and flange 1 has multiple through holes 1 penetrating the upper and lower ends of flange 1. The upper port of the frame is provided with flange 2 around its four sides, and flange 2 has multiple through holes 2 penetrating the upper and lower ends of flange 2. The design of fixing the cover to the upper port of the frame with screws and nuts after the multiple through holes 1 and corresponding through holes 2 are connected one-to-one is is the fifth technical feature of this utility model. The purpose of this design is that: the lower port of the cover is provided with flange 1 around its four sides, and flange 1 has multiple through holes 1 penetrating the upper and lower ends of flange 1. The upper port of the frame is provided with flange 2 around its four sides, and flange 2 has multiple through holes 2 penetrating the upper and lower ends of flange 2. After the cover is provided to the upper port of the frame, and the multiple through holes 1 and corresponding through holes 2 are connected one-to-one is connected with screws and nuts, the assembly of the battery box body and the cover is convenient.

[0011] Technical Solution: A novel liquid-cooled battery housing for energy storage includes a battery housing body and a housing cover. The upper surface of the liquid-cooled base plate in the battery housing body is provided with a frame consisting of a front side plate, a rear side plate, a left side plate, and a right side plate, and the upper end of the frame is provided with a housing cover. The liquid-cooled base plate includes a reinforcing plate, a reinforcing frame, a flow channel plate, a cover plate, a front pressure strip, a middle pressure strip, and a rear pressure strip. A reinforcing frame is provided between the reinforcing plate and the cover plate. A flow channel plate is provided on the reinforcing frame and is located between the reinforcing plate and the cover plate. The upper surface of the cover plate is provided with a front pressure strip, a middle pressure strip, and a rear pressure strip, which are arranged parallel to each other. The left sides of the front pressure strip, the middle pressure strip, and the rear pressure strip are flush to form a brazed positioning of the left side plate. The right side of the front pressure strip, the right side of the middle pressure strip, and the right side of the rear pressure strip are flush to form a brazing positioning surface for the right side plate. The outer side of the rear pressure strip is the brazing positioning surface for the rear side plate. After the reinforcing plate, reinforcing frame, flow channel plate, cover plate, front pressure strip, middle pressure strip, and rear pressure strip are assembled into a liquid-cooled base plate semi-finished product, the box frame is placed on the upper end face of the cover plate, and the inner side of the left side plate in the box frame is in surface contact with the brazing positioning surface of the left side plate, the inner side of the right side plate in the box frame is in surface contact with the brazing positioning surface of the right side plate, and the inner side of the rear side plate in the box frame is in surface contact with the brazing positioning surface of the rear side plate. At this time, the liquid-cooled base plate semi-finished product and the box frame form a battery box body semi-finished product. The battery box body semi-finished product is brazed to form the battery box body.

[0012] Compared with the prior art, the present invention provides a novel liquid-cooled battery box for energy storage and its manufacturing method, which not only has high production efficiency and high yield, but also has good cooling uniformity of the liquid-cooled base plate, as well as high structural strength and light weight. Attached Figure Description

[0013] Figure 1 This is an exploded structural diagram of a novel liquid-cooled battery housing for energy storage.

[0014] Figure 2 This is a schematic diagram of the flow channel structure of the flow channel plate.

[0015] Figure 3 This is a top-view three-dimensional structural diagram of a novel liquid-cooled battery housing for energy storage.

[0016] Figure 4 This is a three-dimensional structural diagram of a novel liquid-cooled battery housing for energy storage, viewed from below.

[0017] Figure 5 This is a rear view structural diagram of a novel liquid-cooled battery housing for energy storage.

[0018] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure at point AA.

[0019] Figure 7 yes Figure 6 Enlarged view of circle B in the middle.

[0020] Figure 8 This is a schematic diagram of the three-dimensional structure of the liquid-cooled base plate.

[0021] Figure 9 This is a top view of the liquid cooling base plate (with the front pressure bar and water nozzle removed).

[0022] Figure 10 This is a top view of the flow channel plate.

[0023] Figure 11 This is a three-dimensional structural diagram of the flow channel plate viewed from below.

[0024] Figure 12 This is a schematic diagram of the three-dimensional structure of the front pressure strip. Detailed Implementation

[0025] Example 1: Refer to Appendix Figures 1-12A novel liquid-cooled battery housing for energy storage includes a battery housing body 1 and a housing cover 2. The upper surface of the liquid-cooled base plate 3 in the battery housing body 1 is provided with a housing frame 4 composed of a front side plate 41, a rear side plate 42, a left side plate 43, and a right side plate 44, and the upper end of the housing frame 4 is provided with the housing cover 2. The liquid-cooled base plate 3 includes a reinforcing plate 5, a reinforcing frame 6, a flow channel plate 7, a cover plate 8, a front pressure strip 9, a middle pressure strip 10, and a rear pressure strip 11. A reinforcing frame 6 is provided between the reinforcing plate 5 and the cover plate 8. A flow channel plate 7 is provided on the reinforcing frame 6 and is located between the reinforcing plate 5 and the cover plate 8. The upper surface of the cover plate 8 is provided with a front pressure strip 9, a middle pressure strip 10, and a rear pressure strip 11, which are arranged in parallel. The left sides of the front pressure strip 9, the middle pressure strip 10, and the rear pressure strip 11 are flush, forming a... The right side plate brazing positioning surface is formed by the right side surfaces of the front pressure strip 9, the middle pressure strip 10, and the rear pressure strip 11, all flush with each other. The outer surface of the rear pressure strip 11 serves as the rear side plate brazing positioning surface. After the reinforcing plate 5, reinforcing frame 6, flow channel plate 7, cover plate 8, front pressure strip 9, middle pressure strip 10, and rear pressure strip 11 are assembled into a liquid-cooled base plate semi-finished product, the box frame 4 is placed on the upper surface of the cover plate 8. The inner surface of the left side plate 43 in the box frame 4 is in surface contact with the left side plate brazing positioning surface, the inner surface of the right side plate 44 in the box frame 4 is in surface contact with the right side plate brazing positioning surface, and the inner surface of the rear side plate 42 in the box frame 4 is in surface contact with the rear side plate brazing positioning surface. At this point, the liquid-cooled base plate semi-finished product and the box frame form the battery box body semi-finished product. The battery box body semi-finished product is then brazed to form the battery box body 1. The box frame 4 is made of aluminum. A novel liquid-cooled battery enclosure for energy storage adopts a high-casing design. A brazing alloy composite layer is provided at the brazing joints between the reinforcing plate 5, reinforcing frame 6, flow channel plate 7, and cover plate 8. The brazing alloy in this composite layer is existing technology and will not be described further here. A brazing alloy composite layer is also provided at the brazing joints between the front pressure strip 9, middle pressure strip 10, and rear pressure strip 11 and the cover plate 8. The brazing alloy in this composite layer is existing technology and will not be described further here. A brazing alloy composite layer is also provided at the brazing joints between the frame 4 and the cover plate 8. The brazing alloy in this composite layer is existing technology and will not be described further here.

[0026] The upper surface of the flow channel plate 7 is provided with concave channels 1, 2, 3, and 4, and these channels are arranged side by side. One side of the concave opening in the concave channel 1 71 has an outlet channel 711, and the other side has an inlet channel 712. The inlet channel 712 is located near the concave channel 2 72. One side of the concave opening in the concave channel 2 72 has an outlet channel 721, and the other side has an inlet channel 722. 722, the second inlet channel 722 is located near the side of the first concave channel 71 and the second outlet channel 721 is located near the side of the third concave channel 73. The third concave channel 73 has an outlet channel 731 on one side of the concave opening and an inlet channel 732 on the other side. The third inlet channel 732 is located near the side of the fourth concave channel 74 and the third outlet channel 731 is located near the side of the second concave channel 72. The fourth concave channel 74 has an outlet channel 741 on one side of the concave opening and an inlet channel 742 on the other side. The fourth inlet channel 742 is located... Near the concave channel 73, a main liquid outlet channel 75 is provided on the upper end face of the flow channel plate 7. The first liquid outlet channel 711, the second liquid outlet channel 721, the third liquid outlet channel 731, and the fourth liquid outlet channel 741 are respectively connected to the main liquid outlet channel 75. An inlet groove 76 is provided on the upper end face of the flow channel plate 7. The upper end face of the cover plate 8 is provided with inlet through holes 81, 82, 83, 84, 85, and 86, which connect the upper and lower ends of the cover plate 8. Inlet through hole 81 communicates with inlet channel 712, and inlet through hole 82 communicates with inlet channel 722. Liquid inlet hole three is connected to liquid inlet channel three 732, liquid inlet hole four is connected to liquid inlet channel four 742, and liquid inlet hole five and liquid inlet hole six are connected to liquid inlet groove 76 respectively. The upper end face of the cover plate 8 is provided with liquid outlet hole 87 that passes through the upper and lower end faces of the cover plate 8 and is connected to the main liquid outlet channel 75. The lower end face of the front pressure strip 9 is provided with liquid inlet groove 91 and liquid inlet groove 91 is connected to liquid inlet hole one, liquid inlet hole two, liquid inlet hole three, liquid inlet hole four and liquid inlet hole five respectively. The flow channel adopts a flow channel with a width of 18-22 mm and a depth of 4.5 mm. The flow channel maintains a distance of ≥15 mm from the side of the plate to achieve the best design effect.

[0027] The inlet channel 712, outlet channel 711, inlet channel 722, outlet channel 721, inlet channel 732, outlet channel 731, inlet channel 742, and outlet channel 741 are all arranged in parallel; the centers of the inlet holes 1, 2, 3, and 4 are located on the same straight line; the flow channel plate 7 is integrally stamped from an aluminum plate. It also includes two water nozzles 12, one of which is connected to the inlet hole 6, and the other is connected to the outlet hole. The outer ends of both water nozzles 12 extend out of the front side plate 41.

[0028] The reinforcing plate 5 is integrally stamped from an aluminum plate. The upper surface of the reinforcing plate 5 is provided with multiple transverse stamping ribs 51 arranged side by side. The upper surface of the reinforcing plate 5 is provided with two parallel longitudinal stamping ribs 52 located on both sides of the multiple transverse stamping ribs 51. The spacing between the two longitudinal stamping ribs 52 matches the width of the frame hole in the reinforcing frame 6. The spacing between the two outermost transverse stamping ribs 51 matches the length of the frame hole in the reinforcing frame 6.

[0029] The reinforcing frame 6 is made of aluminum plate. When the reinforcing frame 6 is placed on the reinforcing plate 5, the transverse stamping ribs 51 and the longitudinal stamping ribs 52 are located inside the frame hole. The two inner wall surfaces in the frame hole along the length direction are in surface contact with the outer surface of the corresponding longitudinal stamping rib 52, and the two inner wall surfaces along the width direction are in surface contact with the outer surface of the corresponding outermost transverse stamping rib 51. The upper end surface of the transverse stamping rib 51 and the upper end surface of the longitudinal stamping rib 52 are flush. The flow channel plate 7 is located on the reinforcing frame 6. The channel portion formed by stamping and recessing in the flow channel plate 7 is located inside the frame hole, and the lower end surface of the channel portion is in surface contact with the upper end surface of the transverse stamping rib 51 and the upper end surface of the longitudinal stamping rib 52. The flow channel plate 7 has a surface contact, with its lower end face making surface contact with the upper end face of the reinforcing frame 6. The cover plate 8 is made of aluminum plate, and its lower end face makes surface contact with the upper end face of the flow channel plate 7. The channels in the flow channel plate 7 formed by stamping and recessing include concave channels 71, 72, 73, and 74; liquid outlet channel 711; liquid inlet channel 712; liquid outlet channel 721; liquid inlet channel 722; liquid outlet channel 731; liquid inlet channel 732; liquid outlet channel 741; and liquid inlet channel 742. The front pressure strip 9, middle pressure strip 10, and rear pressure strip 11 are all made of aluminum strips. The aluminum plate and aluminum strips are made of 6063 aluminum, 3003 aluminum, or 4005 aluminum.

[0030] The outer surfaces of the left side plate 43 and the right side plate 44 are respectively provided with multiple reinforcing ribs 45. The lower port of the box cover 2 is provided with flange 21 around its perimeter, and flange 21 is provided with multiple through holes 22 penetrating the upper and lower ends of flange 21. The upper port of the box frame 4 is provided with flange 46 around its perimeter, and flange 46 is provided with multiple through holes 47 penetrating the upper and lower ends of flange 46. After the box cover 2 covers the upper port of the box frame 4 and the multiple through holes 22 and the corresponding through holes 47 are connected one-to-one, the box is fixedly connected by screws and nuts. The upper surface of the flow channel plate 7 has a large surface area in contact with the upper surface of the cover plate 8, the lower surface of the flow channel plate 7 has a large surface area in contact with the upper surface of the reinforcing frame 6, and the lower surface of the reinforcing frame 6 has a large surface area in contact with the upper surface of the reinforcing plate 5. This surface-to-surface contact between the plates and frames facilitates a single-piece brazing process, achieving overall sealing and fixation after brazing. Furthermore, the surface-to-surface contact between the plates and frames, as well as the lower surface of the channel portion formed by stamping and recessing within the frame holes, achieves surface-to-surface contact with the upper surfaces of the transverse stamping rib 51 and the longitudinal stamping rib 52. This results in excellent overall strength and rigidity for the aluminum liquid-cooled base plate 3 formed by overall brazing, while also ensuring the all-aluminum construction. The liquid-cooled base plate 3 significantly reduces the overall weight of the liquid-cooled base plate, achieving lightweight design. In addition, the channel portion formed by the stamping in the flow channel plate 7, the upper end face of the transverse stamping rib 51 formed by the stamping in the reinforcing plate 5, and the longitudinal stamping rib 52, because they match the frame holes of the reinforcing frame 6, enable the reinforcing plate 5, the reinforcing frame 6, and the flow channel plate 7 to be quickly positioned and assembled before overall brazing. This not only improves the production efficiency of a new type of liquid-cooled battery box for energy storage, but also ensures the brazing quality of the liquid-cooled base plate 3 (after the reinforcing plate 5, the reinforcing frame 6, and the flow channel plate 7 are positioned and assembled, there will be no relative movement in the horizontal direction, ensuring the stability of the brazing quality).

[0031] A method for manufacturing a novel liquid-cooled battery housing for energy storage includes a frame 4 composed of a front side plate 41, a rear side plate 42, a left side plate 43, and a right side plate 44; a reinforcing plate 5; a strengthening frame 6; a flow channel plate 7; a cover plate 8; a front pressure strip 9; a middle pressure strip 10; a rear pressure strip 11; and two water nozzles 12. The method comprises the following steps: Step 1, placing the strengthening frame 6 on the reinforcing plate 5, with the transverse stamping rib 51 and the longitudinal stamping rib 52 located within the frame hole. The two inner wall surfaces in the frame hole along the length direction respectively achieve surface contact with the outer surface of the corresponding longitudinal stamping rib 52, and the two inner wall surfaces in the width direction respectively achieve surface contact with the outer surface of the corresponding longitudinal stamping rib 52. The outermost transverse stamping rib 51 of the corresponding outermost side achieves surface-to-surface contact; Step 2, the flow channel plate 7 is placed on the reinforcing frame 6, the channel portion formed by stamping and recessing in the flow channel plate 7 is located inside the frame hole, and the lower end face of the lower end face of the channel portion achieves surface-to-surface contact with the upper end face of the transverse stamping rib 51 and the upper end face of the longitudinal stamping rib 52. At this time, the lower end face of the plate body portion in the flow channel plate 7 achieves surface-to-surface contact with the upper end face of the reinforcing frame 6; Step 3, the cover plate 8 is placed on the reinforcing frame 6, and the lower end face of the cover plate 8 achieves surface-to-surface contact with the upper end face of the plate body portion in the flow channel plate 7. A design is provided at the contact portion of the flow channel plate or cover plate. It has a brazing alloy composite layer, which is used to melt and complete the welding during the overall brazing process; Step four, install the front pressure strip 9, the middle pressure strip 10 and the rear pressure strip 11 on the cover plate 8 respectively, and the left side of the front pressure strip 9, the left side of the middle pressure strip 10 and the left side of the rear pressure strip 11 are flush to form the brazing positioning surface of the left side plate, and the right side of the front pressure strip 9, the right side of the middle pressure strip 10 and the right side of the rear pressure strip 11 are flush to form the brazing positioning surface of the right side plate, and the outer side of the rear pressure strip 11 is the brazing positioning surface of the rear side plate; Step five, place the box frame 4 on the upper end of the cover plate 8, and the inner side of the left side plate 43 in the box frame 4 is flush with the left side plate The brazing positioning surfaces achieve surface-to-surface contact; the inner side of the right side plate 44 in the frame 4 achieves surface-to-surface contact with the brazing positioning surface of the right side plate; the inner side of the rear side plate 42 in the frame 4 achieves surface-to-surface contact with the brazing positioning surface of the rear side plate; in step six, two water nozzles 12 are respectively installed at the opening of the liquid inlet hole six and the opening of the liquid outlet hole, and the outer ports of both water nozzles 12 extend out of the front side plate 41; in step seven, the assembled reinforcing plate 5, reinforcing frame 6, flow channel plate 7, cover plate 8, front pressure strip 9, middle pressure strip 10 and rear pressure strip 11, frame 4 and two water nozzles 12 are placed in the brazing furnace for overall brazing to form the battery box body 1. The brazing alloy in the brazing alloy composite layer is existing technology, so it will not be described further here.

[0032] The upper surface of the flow channel plate 7 is provided with concave channels 1, 2, 3, and 4, and these channels are arranged side by side. One side of the concave opening in the concave channel 1 71 is provided with an outlet channel 711, and the other side is provided with an inlet channel 712. The inlet channel 712 is located near the concave channel 2 72. One side of the concave opening in the concave channel 2 72 is provided with an outlet channel 2 721. On the other side of the notch, there is a second liquid inlet channel 722, which is located near the first concave channel 71, and a second liquid outlet channel 721 is located near the third concave channel 73. On one side of the notch in the third concave channel 73, there is a third liquid outlet channel 731, and on the other side of the notch, there is a third liquid inlet channel 732. The third liquid inlet channel 732 is located near the fourth concave channel 74, and the third liquid outlet channel 731 is located near the second concave channel 72. On one side of the notch in the fourth concave channel 74, there is a fourth liquid outlet channel 741, and the notch... On the other side, there is a liquid inlet channel 4 742, which is located near the concave channel 3 73. A main liquid outlet channel 75 is provided on one side of the upper end face of the flow channel plate 7. The liquid outlet channels 1 711, 2 721, 3 731, and 4 741 are respectively connected to the main liquid outlet channel 75. A liquid inlet groove 76 is provided on the upper end face of the flow channel plate 7. The upper end face of the cover plate 8 is provided with liquid inlet through holes 1 81, 2 82, 3 83, 4 84, and 5 85, which penetrate the upper and lower ends of the cover plate 8. The six through holes 86, the liquid inlet through holes 1 and 712 are connected, the liquid inlet through holes 2 and 722 are connected, the liquid inlet through holes 3 and 732 are connected, the liquid inlet through holes 4 and 742 are connected, and the liquid inlet through holes 5 and 6 are connected to the liquid inlet groove 76 respectively. The upper end face of the cover plate 8 is provided with a liquid outlet through hole 87 that passes through the upper and lower end faces of the cover plate 8 and is connected to the main liquid outlet channel 75. The lower end face of the front pressure strip 9 is provided with a liquid inlet groove and the liquid inlet groove is connected to the liquid inlet through holes 1, 2, 3, 4 and 5 respectively.

[0033] The battery box body manufactured in this way, and a novel liquid-cooled battery box for energy storage, meet the requirements of high flatness, high mechanical performance, lightweight, temperature uniformity, low cost, high production efficiency, and high yield. Flatness: Since the battery box body only requires brazing without additional welding, welding deformation is avoided and overall flatness is strictly guaranteed; Mechanical performance: Through the multi-layer structure of the liquid-cooled base plate and the design of the reinforcing rib structure formed by stamping of reinforcing plates and flow channel plates (the flow channel plate is stamped to form flow channels, and the concave flow channels form a reinforcing rib structure on the other side of the flow channel plate; the reinforcing plates are stamped to form longitudinal and transverse stamping ribs), the overall strength and rigidity of the liquid-cooled base plate are greatly improved. At the same time, the all-aluminum material greatly reduces the overall weight of the battery box body and the novel liquid-cooled battery box for energy storage. The design achieves lightweighting of the battery box body and a new type of liquid-cooled battery box for energy storage; temperature uniformity: the interactive design of hot and cold flow channels and the design of no temperature difference in the inlet and outlet areas greatly improve the temperature uniformity of the liquid-cooled base plate; low cost and high production efficiency: the battery box body is brazed as a whole, eliminating the need for additional assembly, welding and polishing processes, making the production process extremely simple and greatly improving the production efficiency of the battery box body and the new type of liquid-cooled battery box for energy storage. In addition, since only aluminum is used and there is no potential corrosion risk, the production cost is greatly reduced.

[0034] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.

Claims

1. A novel liquid-cooled battery housing for energy storage, comprising a battery housing body (1) and a housing cover (2), wherein the upper end face of the liquid-cooled bottom plate (3) in the battery housing body (1) is provided with a housing frame (4) composed of a front side plate (41), a rear side plate (42), a left side plate (43), and a right side plate (44), and the upper end of the housing frame (4) is provided with a housing cover (2), characterized in that: The liquid-cooled base plate (3) includes a reinforcing plate (5), a reinforcing frame (6), a flow channel plate (7), a cover plate (8), a front pressure strip (9), a middle pressure strip (10), and a rear pressure strip (11). A reinforcing frame (6) is provided between the reinforcing plate (5) and the cover plate (8). A flow channel plate (7) is provided on the reinforcing frame (6) and is located between the reinforcing plate (5) and the cover plate (8). The upper end face of the cover plate (8) is provided with a front pressure strip (9), a middle pressure strip (10), and a rear pressure strip (11), which are arranged in parallel. The left side of the front pressure strip (9), the left side of the middle pressure strip, and the left side of the rear pressure strip (11) are flush to form a left side plate brazing positioning surface. The right side of the front pressure strip (9), the right side of the middle pressure strip (10), and the rear pressure strip (11) are also present. The three sides of the right side are flush to form a brazing positioning surface of the right side plate. The outer side of the rear pressure strip (11) is the brazing positioning surface of the rear side plate. After the reinforcing plate (5), reinforcing frame (6), flow channel plate (7), cover plate (8), front pressure strip (9), middle pressure strip (10) and rear pressure strip (11) are assembled into a liquid-cooled bottom plate semi-finished product, the box frame (4) is placed on the upper end of the cover plate (8) and the inner side of the left side plate (43) in the box frame (4) is in surface contact with the brazing positioning surface of the left side plate, the inner side of the right side plate (44) in the box frame (4) is in surface contact with the brazing positioning surface of the right side plate, and the inner side of the rear side plate (42) in the box frame (4) is in surface contact with the brazing positioning surface of the rear side plate. At this time, the liquid-cooled bottom plate semi-finished product and the box frame form a battery box body semi-finished product. The battery box body semi-finished product is formed into a battery box body (1) by brazing.

2. The new type of liquid-cooled battery box for energy storage according to claim 1, characterized in that: The upper surface of the flow channel plate (7) is provided with concave channel one (71), concave channel two (72), concave channel three (73) and concave channel four (74), and the concave channel one (71), concave channel two (72), concave channel three (73) and concave channel four (74) are arranged side by side. One side of the concave opening in the concave channel one (711) is provided with liquid outlet channel one (711) and the other side of the concave opening is provided with liquid inlet channel one (712). The liquid inlet channel one (712) is located on the side close to the concave channel two (72). One side of the concave opening in the concave channel two (72) is provided with liquid outlet channel two (721) and... On the other side of the notch, there is a second liquid inlet channel (722), which is located near the first concave channel (71) and the second liquid outlet channel (721) is located near the third concave channel (73). On one side of the notch in the third concave channel (73), there is a third liquid outlet channel (731) and on the other side of the notch, there is a third liquid inlet channel (732). The third liquid inlet channel (732) is located near the fourth concave channel (74) and the third liquid outlet channel (731) is located near the second concave channel (72). On one side of the notch in the fourth concave channel (74), there is a fourth liquid outlet channel (741) and on the other side of the notch, there is a third liquid outlet channel (741). A liquid inlet channel four (742) is provided, which is located on the side near the concave channel three (73). A main liquid outlet channel (75) is provided on one side of the upper end face of the flow channel plate (7). The liquid outlet channels one (711), two (721), three (731) and four (741) are respectively connected to the main liquid outlet channel (75). A liquid inlet groove (76) is provided on the upper end face of the flow channel plate (7). The upper end face of the cover plate (8) is provided with a liquid inlet through hole one (81), a liquid inlet through hole two (82), a liquid inlet through hole three (83), a liquid inlet through hole four (84), a liquid inlet through hole five (85) and a liquid inlet through hole five. Through hole six (86) and liquid inlet through hole one is connected to liquid inlet channel one (712), liquid inlet through hole two is connected to liquid inlet channel two (722), liquid inlet through hole three is connected to liquid inlet channel three (732), liquid inlet through hole four is connected to liquid inlet channel four (742), liquid inlet through hole five and liquid inlet through hole six are connected to liquid inlet groove (76) respectively. The upper end face of the cover plate (8) is provided with liquid outlet through hole (87) that passes through the upper and lower end faces of the cover plate (8) and liquid outlet through hole (87) is connected to the main liquid outlet channel (75); the lower end face of the front pressure strip (9) is provided with liquid inlet groove (91) and liquid inlet groove (91) is connected to liquid inlet through hole one, liquid inlet through hole two, liquid inlet through hole three, liquid inlet through hole four and liquid inlet through hole five respectively.

3. The new type of liquid-cooled battery box for energy storage according to claim 2, characterized in that: The liquid inlet channel 1 (712), liquid outlet channel 1 (711), liquid inlet channel 2 (722), liquid outlet channel 2 (721), liquid inlet channel 3 (732), liquid outlet channel 3 (731), liquid inlet channel 4 (742), and liquid outlet channel 4 (741) are all arranged in parallel; the centers of the liquid inlet through hole 1, liquid inlet through hole 2, liquid inlet through hole 3, and liquid inlet through hole 4 are located on the same straight line 1; the flow channel plate (7) is integrally stamped from an aluminum plate.

4. The new type of liquid-cooled battery box for energy storage according to claim 1, characterized in that: It also includes two water nozzles (12), one of which is connected to the liquid inlet hole six, and the other water nozzle (12) is connected to the liquid outlet hole. The outer ports of the water nozzles (12) extend out of the front side plate (41).

5. A novel liquid-cooled battery housing for energy storage according to claim 1, characterized in that: The reinforcing plate (5) is integrally stamped from an aluminum plate. The upper surface of the reinforcing plate (5) is provided with multiple transverse stamping ribs (51) arranged side by side. The upper surface of the reinforcing plate (5) is provided with two parallel longitudinal stamping ribs (52) located on both sides of the multiple transverse stamping ribs (51). The spacing between the two longitudinal stamping ribs (52) matches the width of the frame hole in the reinforcing frame (6). The spacing between the two outermost transverse stamping ribs (51) matches the length of the frame hole in the reinforcing frame (6).

6. The new type of liquid-cooled battery box for energy storage according to claim 5, characterized in that: The reinforcing frame (6) is made of aluminum plate. When the reinforcing frame (6) is placed on the reinforcing plate (5), the transverse stamping ribs (51) and the longitudinal stamping ribs (52) are located inside the frame hole. The two inner wall surfaces in the frame hole along the length direction are in surface contact with the outer side surface of the corresponding longitudinal stamping rib (52), and the two inner wall surfaces along the width direction are in surface contact with the outer side surface of the corresponding outermost transverse stamping rib (51). The upper end surface of the transverse stamping rib (51) and the upper end surface of the longitudinal stamping rib (52) are flush. The flow channel plate (7) Located on the reinforcing frame (6), the channel portion formed by stamping and recessing in the flow channel plate (7) is located inside the frame hole, and the lower end face of the channel portion is in surface contact with the upper end face of the transverse stamping rib (51) and the upper end face of the longitudinal stamping rib (52). The lower end face of the plate body portion in the flow channel plate (7) is in surface contact with the upper end face of the reinforcing frame (6). The cover plate (8) is made of aluminum plate, and the lower end face of the cover plate (8) is in surface contact with the upper end face of the plate body portion in the flow channel plate (7). The front pressure strip (9), the middle pressure strip (10) and the rear pressure strip (11) are all made of aluminum strip.

7. A novel liquid-cooled battery housing for energy storage according to claim 1, characterized in that: The outer surfaces of the left side plate (43) and the right side plate (44) are provided with multiple reinforcing ribs (45).

8. The new type of liquid-cooled battery box for energy storage according to claim 1, characterized in that: The lower port of the box cover (2) is provided with flange 1 (21) on all four sides, and flange 1 (21) is provided with multiple through holes 1 (22) that pass through the upper and lower ends of flange 1 (21). The upper port of the box frame (4) is provided with flange 2 (46) on all four sides, and flange 2 (46) is provided with multiple through holes 2 (47) that pass through the upper and lower ends of flange 2 (46). After the box cover (2) covers the upper port of the box frame (4) and the multiple through holes 1 (22) and the corresponding through holes 2 (47) are connected one by one, they are fixedly connected by screws and nuts.

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