Energy management device with efficient heat dissipation function for energy storage battery high-voltage box

Abstract

The invention belongs to the technical field of energy storage batteries, and particularly relates to an energy management device with efficient heat dissipation for an energy storage battery high-voltage box, which comprises a battery cabinet and a plurality of cooling boxes, a plurality of battery packs are arranged in an inner cavity of the battery cabinet, the cooling boxes are assembled in the battery cabinet, and two partition plates are fixedly connected to the inner walls of the cooling boxes. A gas cavity is formed in the lower side of the partition plate on the lower side, a water body cavity is formed between the two partition plates, a flow guide cavity is formed in the upper side of the partition plate on the upper side, and the flow guide cavity communicates with the water body cavity; through grooves are formed in the left side wall and the bottom face of the battery cabinet correspondingly, a first fan is installed in the through groove in the lower side, and a refrigeration assembly is arranged in the through groove in the left side. According to the internal layout of the battery cabinet, heating components and wires can be precisely cooled, so that the internal temperature of the battery cabinet is in a proper temperature interval, and the use safety is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage batteries, and particularly relates to an energy management device with efficient heat dissipation for an energy storage battery high-voltage box. BACKGROUND

[0002] The energy storage battery high-voltage box is mainly used for connecting an energy storage battery pack with an external power system to realize input and output of electric energy and distribute high-voltage electric energy to different electrical devices and systems. Generally, the battery high-voltage box needs to be matched with a high-voltage contactor, a fuse, a mutual inductor and a control unit to form a battery energy management unit.

[0003] However, the battery high-voltage box needs to connect a plurality of power voltage ports, and when the batteries are connected in series, the control unit is connected in series (parallel) with each sensor and the control unit, and the connection needs to be realized through wires to realize energy transmission, monitoring and control. According to Joule's law, the current generates heat on the wire, and the heat is proportional to the square of the current, the resistance of the wire and the time of power supply. For example, there is a contact resistance between the wire and the wire, the wire and other electrical elements (such as circuit breakers, fuses, etc.). If the contact is poor, the contact resistance will increase, resulting in more heat at this point. This is because the existence of contact resistance causes local resistance loss at the contact point when the current passes through, which is further converted into heat energy.

[0004] The existing heat dissipation method applied to the energy storage battery high-voltage box is generally to install a heat dissipation fan on the top or side of the battery cabinet to realize heat dissipation by increasing the air flow in the battery cabinet. However, this heat dissipation method is only for large-scale and large-area heat dissipation in the battery cabinet, and cannot accurately dissipate heat for some high-temperature heating components (such as processors, memories, etc.). Moreover, it cannot accurately and efficiently cool the wires with large energy transmission and large heat generation, thereby accelerating the aging and brittleness of the wires and reducing the insulation performance, which may cause the insulation layer to break, cause leakage, cause short circuit between the wires or between the wires and the cabinet, cause electrical failure and other safety problems. SUMMARY

[0005] The application aims to provide an energy management device with efficient heat dissipation for an energy storage battery high-voltage box, which can accurately cool the heating components and wires according to the internal layout of the battery cabinet, so that the internal temperature of the battery cabinet is in an appropriate temperature range, and the use safety is improved.

[0006] The technical scheme adopted by the application is as follows:

[0007] The utility model provides an energy storage battery high pressure box has energy management device of high -efficient heat dissipation, including battery cabinet and a plurality of cooling boxes, the battery cabinet inner chamber is provided with a plurality of battery groups, cooling box is assembled in the battery cabinet, the inner wall of cooling box is fixedly connected with two baffle, the downside of baffle is gas cavity, it is water body cavity between two baffles, the upside of baffle is flow guide chamber, flow guide chamber is communicated with water body cavity,

[0008] The left side wall and the bottom surface of the battery cabinet are respectively provided with a through slot, a first fan is installed in the through slot on the left side, and a refrigeration assembly is arranged in the through slot on the left side.

[0009] The first copper pipe is fixedly connected to the right side wall of the battery cabinet near the bottom surface, the first copper pipe is communicated with the gas cavity, a plurality of air outlet pipes are fixedly connected to the side wall of the first copper pipe, and a flow guide assembly is arranged in the water body cavity.

[0010] Further, the refrigeration assembly comprises a semiconductor refrigeration sheet arranged in the through slot on the left side, the refrigeration surface of the semiconductor refrigeration sheet faces the side of the gas cavity, first heat dissipation fins are respectively bonded to the left and right side walls of the semiconductor refrigeration sheet, and second fans are respectively assembled to the side walls of the first heat dissipation fins.

[0011] Further, a flow guide plate is fixedly connected to the inner wall of the cooling box in the gas cavity, the flow guide plate has a V-shaped structure, the end face of the flow guide plate away from the first fan is a curved arc structure, and the bending direction of the flow guide plate is upward and to the left.

[0012] Further, a plurality of grooves are formed in the end face of the air outlet pipe.

[0013] Further, second heat dissipation fins are respectively fixedly connected to the top surface and the bottom surface of the lower baffle, and the second heat dissipation fins on both sides are connected.

[0014] Further, the flow guide assembly comprises a water pump installed in the water body cavity, a second copper pipe is fixedly connected to the water outlet end of the water pump, the other end of the second copper pipe extends into the flow guide chamber after penetrating through the first copper pipe, the second copper pipe forms a folded structure in the first copper pipe, the diameter of the second copper pipe is smaller than that of the first copper pipe, helical heat conduction fins are fixedly connected to the side wall of the inner cavity of the first copper pipe, and the helical heat conduction fins are attached to the inner wall of the first copper pipe.

[0015] Further, a liquid filling pipe is fixedly connected to the top surface of the cooling box, and a cap is threadedly connected to the end face of the liquid filling pipe.

[0016] Further, the top surface of the upper baffle is downwardly inclined from right to left.

[0017] Further, a plurality of mounting plates are fixedly connected to the side wall of the cooling box, and long holes are formed in the side wall of each mounting plate.

[0018] The technical effects achieved by the application are as follows:

[0019] The energy management device with high-efficiency heat dissipation of the energy storage battery high-voltage box can precisely cool the heating components and wires according to the internal layout of the battery cabinet, so that the internal temperature of the battery cabinet is in an appropriate temperature range, and the aging, damage or even short circuit of the components and wires caused by high temperature factors is avoided, and the use safety is improved.

[0020] The first copper pipe and the second copper pipe used in the energy management device with high-efficiency heat dissipation of the energy storage battery high-voltage box have plasticity, can be bent around the heating components or wound on the wires to realize precise cooling and effectively prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of an embodiment of the application;

[0022] Figure 2 is a perspective view of the cooling box of the embodiment of the application;

[0023] Figure 3 is a bottom view of the cooling box of the embodiment of the application;

[0024] Figure 4 is a sectional view of the cooling box of the embodiment of the application;

[0025] Figure 5 is a structural schematic diagram of the air outlet pipe of the embodiment of the application;

[0026] Figure 6 is an enlarged view of A in the embodiment of the application. Figure 4

[0027] In the drawings, the components represented by each reference numeral are listed as follows:

[0028] 1, battery cabinet; 2, multiple groups of battery packs; 3, cooling box; 4, partition; 5, through slot; 6, first fan; 7, semiconductor refrigeration sheet; 8, first heat dissipation fin; 9, second fan; 10, first copper pipe; 11, air outlet pipe; 12, groove; 13, flow guide plate; 14, second heat dissipation fin; 15, water pump; 16, second copper pipe; 17, spiral heat conduction sheet; 18, liquid filling pipe; 19, mounting plate. DETAILED DESCRIPTION

[0029] ​In order to make the objects and advantages of the present application more clear, the following will specifically describe the present application in conjunction with embodiments. It should be understood that the following description is only used to describe one or several specific embodiments of the present application, and does not strictly limit the scope of protection of the present application.

[0030] Embodiment 1:

[0031] As shown in Figures 1-6 , a high-voltage box of an energy storage battery has an energy management device with efficient heat dissipation, comprising a battery cabinet 1 and a plurality of cooling boxes 3, a plurality of battery groups 2 are arranged in the inner cavity of the battery cabinet 1, the cooling boxes 3 are assembled in the battery cabinet 1, two partitions 4 are fixedly connected to the inner wall of the cooling box 3, the lower side of the lower partition 4 is a gas cavity, the water cavity is between the two partitions 4, and the upper side of the upper partition 4 is a flow guide cavity, which is in communication with the water cavity.

[0032] The left side wall and the bottom surface of the battery cabinet 1 are respectively provided with through grooves 5, a first fan 6 is installed in the lower through groove 5, and a refrigeration assembly is arranged in the left through groove 5.

[0033] The first copper pipe 10 is fixedly connected to the right side wall of the battery cabinet 1 near the bottom surface, the first copper pipe 10 is in communication with the gas cavity, a plurality of air outlet pipes 11 are fixedly connected to the side wall of the first copper pipe 10, and a flow guide assembly is arranged in the water cavity.

[0034] The end position of the first copper pipe 10 is in a sealed state, in actual use, the length of the first copper pipe 10 can also be controlled according to the cooling demand, and the end of the first copper pipe 10 can be sealed by bolts or welding, and can be bent and shaped according to the cooling demand or the distribution position of the components, so as to better perform local cooling.

[0035] As shown in Figure 4 and Figure 6 , the refrigeration assembly comprises a semiconductor refrigeration sheet 7 arranged in the left through groove 5, the refrigeration surface of the semiconductor refrigeration sheet 7 faces the side of the gas cavity, the left and right side walls of the semiconductor refrigeration sheet 7 are respectively bonded with first heat dissipation fins 8, and the side walls of the first heat dissipation fins 8 are respectively assembled with second fans 9.

[0036] The semiconductor refrigeration sheet 7 is generally composed of a plurality of P-type semiconductor and N-type semiconductor elements, which are connected into a galvanic couple through a metal conductor and are packaged in ceramic or other insulating materials; when direct current passes through the semiconductor refrigeration sheet 7, electrons flow from the N-type semiconductor to the P-type semiconductor. In this process, at the junction of the N-type semiconductor and the metal conductor, the electrons transition from a low-energy state to a high-energy state, requiring heat absorption, thereby lowering the temperature of the part, forming a cold end; while at the junction of the P-type semiconductor and the metal conductor, the electrons transition from a high-energy state to a low-energy state, releasing heat, thereby raising the temperature of the part, forming a hot end. In this way, the semiconductor refrigeration sheet 7 realizes the transfer of heat from one end to the other, achieving the purpose of refrigeration. This principle belongs to existing mature technology and will not be described in detail in this scheme.

[0037] Specifically, since the use of the semiconductor refrigeration sheet 7 also generates a certain amount of heat, therefore, during actual installation, a heat dissipation hole can be opened on the side wall of the battery cabinet 1, and the left second fan 9 corresponds to the heat dissipation hole, so that the heat generated by the semiconductor refrigeration sheet 7 during use is conducted to the outside.

[0038] As shown in Figure 4 The inner wall of the cooling box 3 is fixedly connected with a flow guide plate 13, the flow guide plate 13 is in a V-shaped structure, the end face of the flow guide plate 13 away from the first fan 6 is in a curved arc structure, and the bending direction of the flow guide plate 13 is upward and leftward.

[0039] Specifically, during the cooling treatment of the components or wires, the cold air flow blown by the right second fan 9 passes through the structure of the flow guide plate 13, part of which is blown into the first copper pipe 10, and the other part passes through the arc structure of the flow guide plate 13 and is blown onto the second heat dissipation fin 14. By utilizing the cold and heat conduction performance of the second heat dissipation fin 14, the low temperature generated by the airflow can be conducted to the water cavity, so as to cool the liquid in the water cavity, thereby achieving the purpose of auxiliary cooling of the liquid and further improving the cooling effect.

[0040] As shown in Figure 5 The end face of the air outlet pipe 11 is provided with a plurality of grooves 12.

[0041] The top surface and the bottom surface of the lower partition plate 4 are fixedly connected with the second heat dissipation fins 14, respectively, and the two second heat dissipation fins 14 are connected.

[0042] The heat dissipation fins are generally made of metal materials with good thermal conductivity, such as aluminum, copper, etc. When the heat source is in contact with the heat dissipation fins, due to the temperature difference, heat will be transferred from the heat source to the heat dissipation fins through heat conduction. Inside the metal, heat conduction is mainly achieved through the movement of free electrons and lattice vibrations. When the free electrons move in the metal lattice, they collide with the lattice atoms and exchange energy, thereby transferring heat from the high-temperature region to the low-temperature region. The heat of the heat source is first transferred to the bottom of the heat dissipation fin in direct contact with the heat source, causing the bottom of the fin to heat up. Then, the heat is gradually conducted along the length and width of the fin, causing the entire fin to heat up. Due to the large surface area of the fin, heat can be dissipated through the fin surface to the surrounding environment.

[0043] Wherein, in order to avoid the first copper pipe 10 being too close to the components and wires when winding on the wires or adhering to the components, affecting the normal air outlet, therefore, by opening a groove 12 on the end face of the air outlet pipe 11, part of the airflow can be discharged through the groove 12, thereby reducing the temperature around the components or wires, realizing local cooling of the heating area, and at the same time, not affecting the accurate directional cooling of the components and wires.

[0044] Embodiment 2:

[0045] As shown in Figure 4 , the flow guide assembly includes a water pump 15 installed in the water cavity, the water pump 15 is fixedly connected with a second copper pipe 16 at the water outlet end, the second copper pipe 16 extends to the flow guide cavity after penetrating through the first copper pipe 10, the second copper pipe 16 forms a folded structure in the first copper pipe 10, the diameter of the second copper pipe 16 is smaller than that of the first copper pipe 10, the second copper pipe 16 is fixedly connected with a spiral heat conduction sheet 17 on the side wall of the inner cavity of the first copper pipe 10, and the spiral heat conduction sheet 17 is attached to the inner wall of the first copper pipe 10.

[0046] The focus of the present scheme is that the second copper pipe 16 can be in a curved state inside the first copper pipe 10, and the bending mode can be a folded, wavy, or spiral structure, which is used to increase the adsorption efficiency of heat; and the spiral heat conduction sheet 17 can directly conduct the heat on the wires or components to the second copper pipe 16 through the first copper pipe 10, and then cooperate with the low-temperature water flow to cool the heat, on the one hand, and on the other hand, the spiral heat conduction sheet 17 can increase the contact surface with the cold airflow, and when the cold airflow flows in the first copper pipe 10, it can also cool the spiral heat conduction sheet 17, so that the first copper pipe 10 and the second copper pipe 16 can cool each other while conducting the heat of the components or wires, thereby increasing the cooling efficiency of the components and wires.

[0047] As shown in Figure 2 and Figure 3As shown, the top surface of the cooling box 3 is fixedly connected with a liquid filling pipe 18, and the end surface of the liquid filling pipe 18 is threadedly connected with a cap. By arranging the liquid filling pipe 18, liquid can be injected into the flow guide cavity, so that evaporation of water caused by long-term cooling is avoided, and thus the use efficiency can be improved.

[0048] As shown in the figure, Figure 4 The top surface of the upper partition plate 4 is inclined downward from right to left. When the water flow in the second copper pipe 16 flows back into the flow guide cavity, it can quickly flow into the water body cavity along the inclined surface of the partition plate 4 for cooling.

[0049] As shown in the figure, Figure 3 The side wall of the cooling box 3 is fixedly connected with a plurality of mounting plates 19, and the side wall of each mounting plate 19 is provided with a long hole. The mounting mode of the cooling box 3 is not limited to the present scheme, and other modes such as magnetic attraction, bolt connection, welding, clamping, interference fit, etc. can be selected according to actual needs.

[0050] The working principle of the present application is as follows: first, the cooling box 3 is fixed in the battery cabinet 1 through the mounting plate 19, and then the first copper pipe 10 is bent around the heat generating component or the lead wire, or the first copper pipe 10 is wound around the heat generating lead wire. The heat generated by the heat generating component or the lead wire can be conducted on the first copper pipe 10.

[0051] Then start the semiconductor refrigeration piece 7, the first fan 6 and the second fan 9. When the semiconductor refrigeration piece 7 operates, it generates heat on one side and low temperature on the other side. The heating side discharges heat through the left second fan 9, and the cooling side discharges low temperature through the right second fan 9. Cold air flow is generated into the air flow cavity, and at the same time, the first fan 6 can deliver the cold air flow into the first copper pipe 10 to cool the heat absorbed by the first copper pipe 10.

[0052] Then start the water pump 15, which delivers the water flow in the water body cavity to the second copper pipe 16. After flowing in the second copper pipe 16, the water flow can absorb part of the heat on the first copper pipe 10. The water flow is delivered to the flow guide cavity through the second copper pipe 16 and then flows back to the water body cavity from the flow guide cavity. The cold air flow blown by the right second fan 9 is blown onto the second heat dissipation fin 14 through the flow guide plate 13. Through the conduction of the second heat dissipation fin 14, the low temperature is conducted to the water body cavity, which plays a role in auxiliary cooling of the water flow, so as to realize precise cooling of the heat generating component or the lead wire.

[0053] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An energy storage battery high-voltage box has an energy management device with efficient heat dissipation, characterized by: The invention comprises a battery cabinet (1) and a plurality of cooling boxes (3), wherein the inner cavity of the battery cabinet (1) is provided with a plurality of battery packs (2), the cooling box (3) is assembled in the battery cabinet (1), and the inner wall of the cooling box (3) is fixedly connected with two partitions (4), the lower side of the lower partition (4) is a gas cavity, the space between the two partitions (4) is a water cavity, and the upper side of the upper partition (4) is a diversion cavity, and the diversion cavity is connected with the water cavity; The left side wall and the bottom surface of the battery cabinet (1) are respectively provided with through slots (5), a first fan (6) is installed in the through slot (5) on the lower side, and a refrigeration component is provided in the through slot (5) on the left side; A first copper tube (10) is fixedly connected to the right side wall of the battery cabinet (1) near the bottom surface, the first copper tube (10) is communicated with the gas cavity, a plurality of air outlet pipes (11) are fixedly connected to the side wall of the first copper tube (10), and a diversion component is provided in the water cavity.

2. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: The refrigeration assembly comprises a semiconductor refrigeration plate (7) arranged in the left through groove (5), the refrigeration surface of the semiconductor refrigeration plate (7) faces the gas cavity, the left and right side walls of the semiconductor refrigeration plate (7) are respectively bonded with first heat dissipation fins (8), and the side walls of the first heat dissipation fins (8) are respectively equipped with second fans (9).

3. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: The inner wall of the cooling box (3) is located in the gas cavity and is fixedly connected to a guide plate (13). The guide plate (13) is in a V-shaped structure. The end surface of the guide plate (13) away from the first fan (6) is a curved arc structure. The bending direction of the guide plate (13) is to the upper left.

4. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: The end surface of the air outlet pipe (11) is provided with a plurality of grooves (12).

5. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: The top surface and the bottom surface of the lower partition (4) are respectively fixedly connected with second heat dissipation fins (14), and the second heat dissipation fins (14) on both sides are connected.

6. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: The diversion assembly comprises a water pump (15) installed in the water body cavity, the water outlet end of the water pump (15) is fixedly connected to a second copper tube (16), the other end of the second copper tube (16) passes through the first copper tube (10) and then extends into the diversion cavity, the second copper tube (16) forms a folded structure in the first copper tube (10), the diameter of the second copper tube (16) is smaller than the diameter of the first copper tube (10), the second copper tube (16) is located on the side wall of the inner cavity of the first copper tube (10) and is fixedly connected to a spiral heat conducting plate (17), and the spiral heat conducting plate (17) is in contact with the inner wall of the first copper tube (10).

7. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: The top surface of the cooling box (3) is fixedly connected to a liquid filling pipe (18), and the end surface of the liquid filling pipe (18) is threadedly connected to a cap.

8. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: The top surface of the upper partition (4) is tilted downward from right to left.

9. The energy storage battery high-voltage box according to claim 1 has an energy management device with efficient heat dissipation, characterized in that: A plurality of mounting plates (19) are fixedly connected to the side walls of the cooling box (3), and the side walls of the mounting plates (19) are each provided with a long hole.

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