Energy storage battery cooling disc

Abstract

The energy storage battery cooling plate of this invention features inlet and outlet water channels arranged laterally within the harmonica tube of the cooling plate. On the upper end of the cooling plate, facing both sides, are provided inlet holes for each inlet channel and outlet holes for each outlet channel. The inlet holes are a row of through holes leading to one side of the cooling plate, and the outlet holes are a row of through holes leading to the other side. A long strip-shaped return valve is located at the lower end of the cooling plate, forming a return channel between the return valve and the spacer plate. The internal space of the upper frame is divided by the cooling plate into an inlet water collection chamber and an outlet water collection chamber, respectively connected to the inlet and outlet of the cooling power system. The two ends of the upper frame are sealed. The parallel arrangement of the inlet and outlet water collection chambers and the multiple independent single-circulation cooling water channels of this invention solve the problem of uneven temperature distribution in the horizontal and vertical directions of the cooling plate. It is reliable in operation, simple in structure, and significantly reduces the total power requirements of the cooling power system, thus greatly reducing investment.

Description

Technical Field

[0001] This invention relates to a cooling plate, and more particularly to a cooling plate for cooling and temperature reduction of energy storage batteries. Background Technology

[0002] Energy storage batteries, especially lithium batteries, generate a lot of heat when they are working, which causes their own temperature to rise, affecting their charging and discharging performance and lifespan. Therefore, cooling devices are needed to cool them down.

[0003] Existing cooling devices using harmonica-tube-style cold plate structures have solved the problem of flat contact between the cooling plate and the battery, but they still have drawbacks such as uneven cooling plate temperature, complex structure, and high power requirements of the matching liquid cooling unit.

[0004] Based on the technology of "a parallel flow cooling plate for cooling lithium batteries" (authorization announcement number CN210092289 U) developed in the early stage, the applicant has further developed the technical solution of this application. Summary of the Invention

[0005] The purpose of this invention is to provide a battery cooling pad with a simple structure, uniform cooling temperature, and low power consumption.

[0006] The cooling medium used in this invention is not limited to water; various common and suitable refrigerants can be used. For ease of description, this specification refers to the general pipes, channels, devices, etc. involved in this invention as inlet pipes, inlet channels, water pumps, etc., and the public should interpret them broadly.

[0007] The energy storage battery cooling plate of the present invention includes a rectangular strip-shaped harmonica tube cooling plate and four side frames (top, bottom, left, and right). The cooling plate is fixedly installed in the four side frames. The harmonica tube cooling plate is a plate-shaped extruded aluminum profile. The top and bottom surfaces of the profile are parallel, smooth, and flat panels. The panels are separated by a row of longitudinal parallel channels, which constitute the inlet and outlet channels of the harmonica tube cooling plate.

[0008] The inlet and outlet water channels of the cooling plate are arranged horizontally at intervals in the harmonica tube. On the upper end of the cooling plate, facing both sides of the cooling plate, there are water inlet holes for each inlet water channel and water outlet holes for each outlet water channel. The water inlet holes are a row of through holes leading to one side of the cooling plate, and the water outlet holes are a row of through holes leading to the other side of the cooling plate.

[0009] A long strip-shaped return valve is provided at the lower end of the cooling plate. The thickness of the return valve is equal to the height of each inlet and outlet water channel, and its length is equal to the width of the next row of inlet and outlet water channels on the cooling plate.

[0010] At the lower end of the cooling plate, the longitudinal partitions between each adjacent inlet and outlet water channel are shorter than the panel of the cooling plate, forming a long groove-shaped transverse cavity at the lower end of the cooling plate. The return valve is embedded in and seals the cavity, and a refrigerant return channel is formed between the return valve and the longitudinal partition.

[0011] The upper frame is a hollow profile with a cooling plate mounting port on one side. The cooling plate is inserted into the mounting port and sealed and fixed to the upper frame. The internal space of the upper frame is divided into two parts by the cooling plate. The water inlet hole of the cooling plate is a water inlet collection chamber, and the water outlet hole of the cooling plate is a water outlet collection chamber. The water inlet and water outlet collection chambers are respectively provided with water inlets and outlets connected to the cooling power system. The two ends of the upper frame are sealed.

[0012] The basic technical solution of the present invention, as described above, has the following technical effects: First, the spaced-apart inlet and outlet channels ensure that in each pair of adjacent channels, one is an inlet channel directly connected to the water collection chamber, and the other is an outlet channel directly connected to the water collection chamber. The cooling medium completes a full cooling cycle within a pair of adjacent channels. Furthermore, there is no sequential order among the numerous pairs of cooling circulation channels on the entire cooling plate, thus solving the problem of uneven temperature distribution across the lateral direction of the cooling plate caused by multiple circulations of the cooling medium in the channels, as described in patent applications CN 114583331 A and CN108039434 A. Secondly, the spaced inlet and outlet water channels ensure that the cooling medium temperatures in adjacent water channels at the same longitudinal position are complementary—the low temperature at the inlet hole of the inlet channel corresponds to the high temperature at the outlet hole of the outlet channel, the slightly lower temperature in the middle of the inlet channel corresponds to the slightly higher temperature in the middle of the outlet channel, and the medium-low temperature in the inlet channel far from the inlet hole corresponds to the medium-low temperature in the outlet channel far from the outlet hole. This complementary temperature matching ensures that the temperature of the cooling plate is balanced along the longitudinal direction of the water channels. This solves the problem of uneven temperature along the longitudinal direction of the water channels in the cooling plates provided in patent documents such as CN 216354409 U and CN 210092289 U. Furthermore, the cooling plate of this invention, composed of parallel inlet and outlet water collection chambers in the upper frame and multiple independent single-circulation cooling water channels, is reliable in operation, simple in structure, and greatly reduces the total power requirements of the cooling power system, thus significantly reducing investment.

[0013] To improve the backflow of the cooling water in each outlet channel of the cooling plate, so that the cooling water flowing out of a certain inlet channel flows back to its adjacent outlet channel, the backflow device of the present invention can be configured as a saw blade shape, with teeth on the side facing the inlet and outlet channels corresponding to each inlet and outlet channel. The width of the teeth is equal to the distance between adjacent inlet and outlet channels, and the tips of the teeth of the backflow device point to the center of each corresponding inlet and outlet channel.

[0014] To further improve the reflux effect, the teeth of the saw blade-shaped diverter can be made into an arc shape, and the intersection of the arc-shaped teeth forms a tooth tip pointing to the center of each corresponding inlet and outlet channel.

[0015] Depending on the specific dimensions of the cooling plate, several cooling plates can be arranged in parallel along the same plane to form a larger cooling plate; the upper frame of the cooling plate is correspondingly widened. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a three-dimensional exploded view of the upper part of the cooling plate and the sealing strip.

[0018] Figure 3 yes Figure 2 Enlarged view of the end of the cooling plate.

[0019] Figure 4 This is a three-dimensional exploded view of the lower end of the cooling plate and the reflux device.

[0020] Figure 5 This is one of the three-dimensional structural diagrams of the upper frame of the present invention.

[0021] Figure 6 This is the second three-dimensional structural diagram of the upper frame of the present invention.

[0022] The diagram shows: a cooling plate 1, an upper surface 101, a lower surface 102, a harmonica tube 103, a longitudinal rib 104, a water inlet 105 and a water outlet 106, a toothed mouth 107 and a tooth tip 108; an upper frame 21, a cooling plate mounting port 211, a water inlet collection chamber 212, and a water outlet collection chamber 213; a lower frame 22, a left frame 23, and a right frame 24; a load-bearing support beam 3, a sealing strip 4, a return valve 5, a water inlet 6, and a water outlet 7. Implementation

[0023] See Figure 1 , Figure 1 The back side of the invention is shown. The energy storage battery cooling plate of this embodiment includes three rectangular strip-shaped harmonica tube cooling plates 1 and four side frames: an upper frame 21, a lower frame 22, a left frame 23, and a right frame 24, as well as five load-bearing beams 3 on the back side of the cooling plates. The three cooling plates 1 are arranged horizontally and parallel to each other along the same plane and are fixedly installed inside the four side frames; the load-bearing beams 3 on the back side of the cooling plates 1 are fixed at both ends to the left frame 23 and the right frame 24; the upper frame 21 is provided with a water inlet 6 and a water outlet 7.

[0024] See Figure 2 and 3The harmonica tube cooling plate 1 is an extruded sheet aluminum profile. The upper surface 101 and lower surface 102 of the aluminum profile are parallel, smooth and flat panels. A row of longitudinal harmonica tubes 103 is arranged in the plate between the panels. The harmonica tubes 103 are a row of longitudinal parallel channels separated by longitudinal vertical ribs 104 in the space between the two panels. These longitudinal parallel channels constitute the inlet and outlet water channels of the harmonica tube cooling plate 1.

[0025] In this embodiment, the longitudinal vertical ribs 104 between each harmonica tube 103 are milled away at both the upper and lower ends of the cooling plate 1, so that each longitudinal vertical rib 104 is shorter than the panel of the cooling plate 1, thereby forming a long groove-shaped transverse cavity at each end of the cooling plate 1; wherein, the transverse cavity at the upper end is used to embed and weld the sealing strip 4. After the aluminum sealing strip 4 is embedded in the transverse cavity at the upper end of the cooling plate 1, it is sealed and welded to it, so that the front end of each harmonica tube 103 is sealed with the outside of the cooling plate 1 and with the front ends of adjacent harmonica tubes 103; Figure 4 The lower end of the cooling plate 1 has a deep transverse cavity for embedding and welding the recirculator 5, and forming a refrigerant recirculation channel.

[0026] At the upper end of the cooling plate 1, the front of each harmonica tube 103, near the sealing strip 4, facing the two surfaces of the cooling plate 1, is provided with a water inlet hole 105 for each water inlet channel and a water outlet hole 106 for each water outlet channel; the water inlet hole 105 is a row of through holes leading to the lower surface 102, and the water outlet hole 106 is a row of through holes leading to the upper surface 101; that is, each harmonica tube 103 on the cooling plate 1 has a through hole at its front, and the through holes of two adjacent harmonica tubes 103 are in opposite directions, facing the two sides of the cooling plate 1 respectively.

[0027] like Figure 4 As shown, the return valve 5 in this embodiment is long and saw-shaped, embedded and welded into the long groove-shaped transverse cavity at the lower end of the cooling plate 1. The thickness of the return valve 5 is equal to the height of the harmonica tube 103, and its length is equal to the total transverse width of a row of harmonica tubes on a cooling plate 1. After the return valve 5 is embedded, gaps are left between it and each longitudinal vertical rib 104 to form a refrigerant return channel. The side of the return valve 5 facing the inlet and outlet water channels is provided with multiple arc-shaped teeth 107, each tooth corresponding to each inlet and outlet water channel. The width of the arc-shaped teeth 107 is equal to the distance between adjacent water channels. The intersection of the teeth 107 forms a tooth tip 108 pointing to the center of each corresponding water channel, so that the cooling water flowing out of a certain inlet water channel flows back to its two adjacent outlet water channels.

[0028] like Figure 5 and 6As shown, the upper frame 21 in this embodiment is a hollow aluminum profile in the shape of a square column. On its four sides, from the inner side inwards, there is a cooling plate mounting port 211. The upper end of the cooling plate 1 is inserted into the mounting port 211 and sealed and welded to the upper frame 21. The internal space of the upper frame 21 is divided into two parts by the cooling plate 1. The water inlet collection chamber 212 connects to the cooling plate water inlet hole 105, and the water outlet collection chamber 213 connects to the cooling plate water outlet hole 106. The water inlet collection chamber 212 has a water inlet 6 connected to the cooling power system, and the water outlet collection chamber 213 has a water outlet 7 connected to the cooling power system. The two ends of the water inlet collection chamber 212 and the water outlet collection chamber 213 are welded and sealed, forming a sealed waterway that is leak-proof, airtight, and can withstand 10kg of water pressure. Except for connecting the water inlet 6 and the water inlet hole 105, or connecting the water outlet 7 and the water outlet hole 106, it is not connected to the outside.

[0029] The bottom frame 22, left frame 23, and right frame 24 are all hollow aluminum profiles in the shape of square columns. The inner side of each frame is provided with an inward cooling plate mounting groove with a depth of 5mm. The cooling plate is inserted into the mounting groove and fixed to the frame.

[0030] The four edges of the cooling plate are joined at a 45-degree angle using built-in right-angle corner connectors; the right-angle corner connectors are inserted into the adjacent edges and secured with screws.

[0031] The cooling plate of the present invention also has supporting members on the back of the cooling plate 1, namely, five load-bearing beams 3, with both ends of the load-bearing beams 3 fixed to the left frame 23 and the right frame 24 respectively. In this way, the weight of the energy storage battery is mainly borne by the load-bearing beams 3 and the frame, reducing the mechanical strength requirements of the cooling plate 1 to resist the weight of the energy storage battery, further reducing the thickness of the cooling plate 1, and improving the heat dissipation effect.

[0032] All welding described in this invention is brazing, as described in the background section of the applicant's previous patents.

Claims

1. A battery cooling plate, comprising a rectangular strip-shaped harmonica tube cooling plate and four side frames (top, bottom, left, and right), wherein the cooling plate is fixedly installed within the four side frames; characterized in that, The inlet and outlet channels of the cooling plate are arranged horizontally at intervals in the harmonica tube. On the upper end of the cooling plate, facing both sides of the cooling plate, there are water inlet holes for each inlet channel and water outlet holes for each outlet channel. The water inlet holes are a row of through holes leading to one side of the cooling plate, and the water outlet holes are a row of through holes leading to the other side of the cooling plate. A long strip-shaped return valve is provided at the lower end of the cooling plate. The thickness of the return valve is equal to the height of each inlet and outlet water channel, and its length is equal to the width of the previous row of inlet and outlet water channels on the cooling plate. At the lower end of the cooling plate, the longitudinal partitions between each adjacent inlet and outlet water channel are shorter than the panel of the cooling plate, forming a long groove-shaped transverse cavity at the lower end of the cooling plate. The return valve is embedded in and seals the cavity, and a return channel is formed between the return valve and the partition plate. The upper frame is a hollow profile with a cooling plate mounting port on one side. The cooling plate is inserted into the mounting port and sealed and fixed to the upper frame. The internal space of the upper frame is divided into two parts by the cooling plate. The water inlet hole of the cooling plate is a water inlet collection chamber, and the water outlet hole of the cooling plate is a water outlet collection chamber. The water inlet and water outlet collection chambers are respectively provided with water inlets and outlets for connecting to the cooling power system. The two ends of the upper frame are sealed. The aforementioned return device is a saw blade-shaped diverter return device. On the side facing the inlet and outlet water channels, there are teeth corresponding to each inlet and outlet water channel. The width of the teeth is equal to the distance between adjacent inlet and outlet water channels, and the tips of the teeth of the diverter return device point to the center of each corresponding inlet and outlet water channel.

2. The cooling plate according to claim 1, characterized in that, The saw-shaped diverter and return device has arc-shaped teeth, and the intersection of the arc-shaped teeth forms tooth tips pointing to the center of each corresponding inlet and outlet channel.

3. The cooling plate according to claim 2, characterized in that, The cooling plate consists of several pieces, which are arranged in parallel along the same plane.

4. The cooling plate according to claim 3, characterized in that, The four frames are connected by built-in right-angle corner joints. The right-angle corner joints are inserted into the adjacent frames and fixed with screws. The inner sides of the bottom frame and the left and right frames are provided with cooling plate mounting grooves. The cooling plates are inserted into the mounting grooves and fixed to the frames.

5. The cooling plate according to claim 4, characterized in that, It also includes at least one longitudinal or transverse support disposed on the battery side of the cooling plate, the two ends of which are fixed to the frame.

Images