TWI731664B - Lithium battery intelligent internal circulation cooling system - Google Patents

Abstract

A lithium battery intelligent internal circulation heat dissipation system includes a first power module, a second power module, a liquid inlet pipe, a liquid discharge pipe, a circulating heat dissipation module, and a heat dissipation fluid filled therein. The liquid inlet pipe has a first liquid inlet branch pipe, and the first liquid inlet branch pipe has a front-to-back device inlet. The first power module is connected to the front device inlet, and the second power module is connected to the rear device inlet. Liquid port; the discharge pipe has a first discharge branch pipe, the first discharge branch pipe has a front and back device discharge port, the first power module is connected to the rear device discharge port, and the second power module is connected to the front The liquid inlet of the device, so as to achieve that the heat dissipation fluid flows into the first power module first, but flows out of the first power module later, which means the state of "first in, last out", so that the first power module in the same circulation system And the second power module can get equal heat dissipation effect.

Description

Lithium battery intelligent internal circulation cooling system

The invention relates to a heat dissipation system for energy storage equipment, in particular to a lithium battery intelligent internal circulation heat dissipation system that can uniformly dissipate a large number of batteries at the same time in a single circulation system.

In a society where renewable energy is becoming more and more popular, storing the excess electricity generated during the peak ionization time and releasing it during the peak time has become a major issue in the massive use of renewable energy. The most direct way to store electricity is to use rechargeable battery packs; only rechargeable battery packs will release heat during charging and discharging. If ignored, the life of the rechargeable battery pack will be greatly reduced due to the temperature rise, or safety problems may occur; and if a large amount of storage is required Electricity is bound to use a large number of rechargeable battery packs. How to dissipate heat evenly among all the rechargeable battery packs in different locations to prevent the rechargeable battery packs in specific locations from failing first has become the object of research by various units.

The conventional method is disclosed in my country Patent Application No. 107145070 "Battery Temperature Control Device and Method, Controller, Storage Medium, and Charging and Swap Station". For individual batteries, install individual corresponding refrigerant circulation systems, but if applied In a large number of battery systems, it is bound to face the complexity of pipeline assembly and the higher costs brought by a large number of independent circulation systems.

As disclosed in China's Patent Application No. 103112870 "System for Evenly Distributing Temperature Between Battery Cells", a large number of batteries are placed in a large circulation tank at the same time, and the heat transfer fluid circulating in the tank is used to transfer each battery The temperature is averaged, but the heat dissipation effect obtained when the batteries are in different positions in the circulation tank will not be the same after all, and the relevant design points are not disclosed in the case; and a large number of batteries are concentrated in a single tank. When individual batteries in the tank need to be repaired, they also face the problem of a large number of batteries being offline at the same time.

In view of this, the inventors devote themselves to research and design, and hope to provide an energy storage and heat dissipation system that can reduce costs but still maintain an average efficiency. This is the motive of the invention that the present invention intends to research and create.

The main purpose of the present invention is to provide a lithium battery intelligent internal circulation heat dissipation system, which can evenly distribute the heat dissipation fluid of multiple battery packs in the same circulation system through pipeline arrangement, so that individual battery packs in different positions can get equal heat dissipation fluid flow. , Can control the total cost of the heat sink and have a good averaging effect.

Therefore, the lithium battery intelligent internal circulation heat dissipation system of the present invention includes a first power module, a second power module, a liquid inlet pipe, a liquid discharge pipe, a circulating heat dissipation module, and a heat dissipation fluid filled therein .

The first power module includes a first housing and a first power unit. The first housing includes a first liquid inlet and a first drain hole. The first power unit is fixed in the first housing. There is a space for fluid to flow between a housing and the first power unit. The first power unit includes a first thermal sensing element to detect the temperature in the first power unit.

The second power module includes a second housing and a second power unit, the second housing includes a second liquid inlet hole and a second liquid drain hole, the second power unit is fixed in the second housing, and the first There is a space for fluid to flow between the two housings and the second power unit. The second power unit includes a second thermal sensing element to detect the temperature in the second power unit.

The liquid inlet pipe includes a first liquid inlet branch pipe, the first liquid inlet branch pipe includes a first device liquid feeding port and a second device liquid feeding port, and the second device liquid feeding port is located at the end of the first liquid inlet branch pipe , The liquid supply port of the first device is located at the front end of the liquid supply port of the second device, the liquid supply port of the first device is detachably combined with the first liquid inlet hole, and the liquid supply port of the second device is detachably combined with the second liquid inlet. Liquid hole.

The drain pipe includes a first drain branch pipe. The first drain branch pipe includes a first device drain port and a second device drain port. The second device drain port is located in the first drain branch pipe At the end, the first device discharge port is located at a position closer to the front end of the second device discharge port, the first device discharge port is detachably combined with the second discharge hole, and the second device discharge port is detachably combined with the second device. A row of liquid holes.

The circulating heat dissipation module includes a circulating pump, a control unit and a heat dissipation unit. The heat dissipation unit includes a cold row and a fan. The control unit is electrically connected to the circulating pump, the fan, the first power module and the second power module to circulate One end of the pump is connected to the cold row, the other end of the circulating pump is connected to the liquid inlet pipe, and the other end of the cold row is connected to the liquid discharge pipe. The heat dissipation fluid is filled in the first power module, the second power module, the liquid inlet pipe, the liquid discharge pipe and the circulating heat dissipation module, and the heat dissipation fluid is driven by the circulating pump to circulate. The control unit can control the flow rate of the circulating pump and the power output of the first and second power modules.

When the heat dissipation fluid flows out of the circulating pump into the liquid inlet pipe, and then moves to the first and second power modules, because the connection position of the first power module on the first liquid inlet branch pipe is located at the connection position of the second power module In the front, the heat dissipation fluid will first flow into the first power module and then into the second power module; but when the drain pipe is connected, the connection position of the first power module on the first drain branch pipe is located in the second power module Behind the connection position, the heat dissipation fluid flowing out of the second power module will leave earlier than the first power module, so that the heat dissipation fluid flows into the first power module first but flows out of the first power module later, meaning That is, the "first-in-last-out" state allows the first power module and the second power module in the same circulatory system to get an equal heat dissipation effect. After the heat dissipating fluid takes away the heat of the first and second power modules, it flows from the drain pipe to the heat dissipating unit to cool down and then repeats the cycle. In this way, there is no need to independently manage the heat dissipation fluid flow of the first and second power modules, and the heat dissipation effects of both can be evened.

Since the first and second power modules each have a thermal sensing element and are connected to the control unit, if the internal temperature of each power module rises due to the output power, the control unit can increase the flow rate of the heat dissipation fluid to accelerate heat dissipation; When the power output is reduced, the flow of the cooling fluid can be reduced. The liquid inlet pipe and the liquid discharge pipe can also be equipped with thermal sensing elements, so that the control unit can control the heat dissipation fluid flow of the circulating heat dissipation module by measuring the temperature difference of the liquid inlet and discharge.

The present invention can simply expand the total power capacity, such as adding a third power module and a fourth power module, adding a second liquid inlet branch pipe to the liquid inlet pipe, and adding a liquid discharge pipe after the first liquid inlet branch pipe. A second discharge branch pipe is before the first discharge branch pipe, and then the third power module and the fourth power module are connected to the second inlet branch pipe and the second row according to the principle of "first in, last out". The liquid branch pipe, so that the heat dissipation fluid will first flow into the first liquid inlet branch pipe and then into the second liquid inlet branch pipe, and then the heat dissipation fluid of the second liquid discharge branch pipe will be earlier than the heat dissipation fluid of the first liquid discharge branch pipe. Without leaving, the average heat dissipation capacity can still be achieved.

The first liquid inlet branch pipe, the second liquid inlet branch pipe, the first liquid discharge branch pipe and the second liquid discharge branch pipe can each have a flow valve electrically connected to the control unit. If one of the power modules has a higher temperature The control unit can concentrate the flow of the heat-dissipating fluid on a certain group of inlet branch pipes and discharge branch pipes to enhance heat dissipation; or cut off one group of inlet branch pipes and discharge branches when individual power modules need to be repaired The flow of the tube is convenient for maintenance, and it is not necessary to disconnect all the power modules from the control unit at the same time.

In addition, the number of power modules connected to a single set of liquid inlet and discharge branch pipes can be increased to increase the total power capacity. For example, a fifth power module can be added between the first power module and the second power module to allow The branch pipe that originally connected two power modules in series was increased to three power modules in series, but the circulation relationship of the heat dissipation fluid between the first, fifth and second power modules also follows the principle of "first in, last out", so the same The first, fifth, and second power modules of the liquid inlet and liquid discharge branch pipes can still get an evenly distributed flow of heat dissipation fluid.

In order to further understand the features, characteristics and technical content of the present invention, please refer to the following detailed description of the present invention.

Please refer to Figures 1 to 3, which reveal the drawings of the embodiments of the present invention. The above drawings illustrate the lithium battery intelligent internal circulation heat dissipation system A of the present invention, which includes a first power module 1, which includes a first power module 1. A housing 10 and a first power unit 11, the first housing 10 includes a first liquid inlet 101 and a first drain hole 102, the first power unit 11 is fixed in the first housing 10, and the first housing 10 There is a first space 12 for fluid to flow between the housing 10 and the first power unit 11. The first liquid inlet 101 and the first drain hole 102 communicate with the first space 12, and the first power unit 11 includes a first thermal sensor. Measuring components (not drawn) to detect the temperature in the first power unit 11;

A second power module 2 includes a second housing 20 and a second power unit (not shown). The second housing 20 includes a second liquid inlet 201 and a second liquid discharge hole 202. The second electrical power The unit (not drawn) is fixed in the second housing 20, and there is a second space (not drawn) for fluid to flow between the second housing 20 and the second power unit (not drawn), and the second liquid inlet 201 And the second drain hole 202 are connected to the second space (not shown), and the second power unit (not shown) includes a second thermal sensing element (not shown) to detect the temperature in the second power unit (not shown) The arrangement of the second power unit (not drawn) and the second space (not drawn) in the second power module 2 is the same as the arrangement of the first power unit 11 and the first space 12 in the first power module 1, so Omitted in the figure;

A liquid inlet pipe 3, which includes a first liquid inlet branch pipe 31, the first liquid inlet branch pipe 31 includes a first device liquid supply port 311 and a second device liquid supply port 312, and a second device liquid supply port 312 Located at the end of the first liquid inlet branch pipe 31, the liquid supply port 311 of the first device is located at the front end of the liquid supply port 312 of the second device. The liquid supply port 311 of the first device is detachably combined with the first liquid inlet 101 in a watertight manner. The liquid feeding port 312 of the second device is detachably combined with the second liquid inlet 201 in a watertight manner;

A drain pipe 4, which includes a first drain branch pipe 41. The first drain branch pipe 41 includes a first device drain port 412 and a second device drain port 411. The second device drain port 411 Located at the end of the first drain branch pipe 41, the first device drain port 412 is located at a position closer to the front end of the second device drain port 411, and the first device drain port 412 is detachably combined with the second drain hole 202 in a watertight manner. The liquid discharge port 411 of the second device is detachably combined with the first liquid discharge hole 102 in a watertight manner;

A circulating heat dissipation module includes a circulating pump 5, a control unit 51, and a heat dissipation unit 52. The heat dissipation unit 52 includes a cold row 521 and a fan 522. The control unit 51 is electrically connected to the circulation pump 5, the fan 522, and the A power unit 11 and a second power unit (not shown). One end of the circulating pump 5 is connected to the cold row 521, the other end of the circulating pump 5 is connected to the inlet pipe 3, the other end of the cold row 521 is connected to the drain pipe 4, and the circulating pump There may be a first check valve (not shown) between 5 and the liquid inlet pipe 3, a second check valve (not shown) between the cold row 521 and the discharge pipe 4, and a first check valve ( (Not drawn) and the second check valve (not drawn) can prevent backflow; and

A heat dissipation fluid (not shown), which is filled in the first space 12, the second space (not shown), the liquid inlet pipe 3, the liquid discharge pipe 4 and the circulating heat dissipation module, and the heat dissipation fluid (not shown) is received by the circulating pump 5 Push and circulate. The control unit 51 can control the flow rate of the heat dissipation fluid (not shown) pushed by the circulating pump 5 and the power output of the first power module 1 and the second power module 2. The heat transfer fluid (not drawn) of the present invention can use a non-conductive insulating vegetable oil formula. Soaking each power unit in the heat transfer fluid (not drawn) can also reduce the probability of arcing between the electrodes of each power unit, and increase safety.

When the embodiment (1) of the present invention is in operation, the heat dissipation fluid (not shown) flows from the circulating pump 5 to the liquid inlet pipe 3, and then to the first liquid inlet branch connected to the first power module 1 and the second power module 2 The pipe 31 moves, because the first liquid inlet 101 of the first power module 1 and the second liquid inlet 201 of the second power module 2 are both connected to the first liquid inlet branch pipe 31, and the first liquid inlet The liquid supply port 311 of the first device connected to the hole 101 is located in front of the liquid supply port 312 of the second device connected to the second liquid inlet 201, and the heat dissipation fluid (not shown) will flow into the first power from the liquid supply port 311 of the first device. Module 1, and then flow into the second power module 2 from the second device to the liquid port 312; and when the drain pipe 4 is connected, because the first drain hole 102 of the first power module 1 and the second power module The second discharge holes 202 of 2 are all connected to the first discharge branch pipe 41, and the second device discharge port 411 connected to the first discharge hole 102 is located in the first device row connected to the second liquid inlet 201 Behind the liquid port 412, the heat dissipation fluid (not shown) flowing out of the second power module 2 will first flow into the liquid discharge pipe 4 from the first device discharge port 412, and the heat dissipation fluid (not shown) flowing out of the first power module 1 ) Will flow into the drain pipe 4 from the drain port 411 of the second device more slowly.

In this way, the heat dissipation fluid (not shown) flowing out of the second power module 2 will leave the drain pipe 4 earlier than the heat dissipation fluid (not shown) flowing out of the first power module 1, thereby achieving a heat dissipation fluid. (Not drawn) First power module 1 flows into the first power module 1 but later flows out of the first power module 1, which means the state of "first-in-last-out", so that the first power module 1 and the second power module in the same circulatory system Module 2 can get an equal heat dissipation effect, and there is no need to install independent circulation systems for the first power module 1 and the second power module 2, which can save the independent management of the first power module 1 and the second power module 2 The cost of heat dissipation fluid flow can also equalize the heat dissipation effects of both parties. The heat dissipation fluid (not shown) takes away the heat of the first power module 1 and the second power module 2, and then flows from the drain pipe 4 to the cold row 521 of the heat dissipation unit 52, and at least one fan is combined with the cold row 521 522. After the heat dissipation fluid (not shown) is cooled by the fan 522 in the cold row 521, it is repeatedly introduced into the liquid inlet pipe 3 from the circulating pump 5 for continuous circulation.

Since the first power module 1 and the second power module 2 respectively have a first thermal sensing element (not drawn) and a second thermal sensing element (not drawn) and are connected to the control unit 51, if the first power When the internal temperature of the module 1 and the second power module 2 rises due to the output power, the control unit 51 can control the circulating pump 5 to increase the flow of the heat dissipation fluid (not shown) to accelerate the heat dissipation, and it can also increase the speed of the fan 522 at the same time. The heat dissipation speed of the cold row 521; when the power output of the first power module 1 and the second power module 2 is reduced, the flow rate of the heat dissipation fluid (not shown) and the rotation speed of the fan 522 can be reduced. The liquid inlet pipe 3 and the liquid discharge pipe 4 can also be equipped with an inlet liquid heat sensing element (not shown) and a liquid discharge heat sensing element (not shown) respectively, and are respectively electrically connected to the control unit 51, so that the control unit 51 can borrow The flow rate of the heat dissipation fluid (not shown) and the speed of the fan 522 are controlled by measuring the temperature difference generated by the heat dissipation fluid (not shown) after flowing through the first power module 1 and the second power module 2, for example, detection After the heat dissipation fluid (not shown) flows through the power modules, the temperature rises above an initial value and the flow rate and the speed of the fan 522 are increased to keep the heat dissipation fluid of the present invention within a certain temperature range; if the heat dissipation fluid (not shown) If the temperature rise is too high and the temperature of each power module also exceeds a critical value at the same time, the control unit 51 can add the circulating pump 5 and the fan 522 to full-speed operation to respond.

In the fourth and fifth figures, in the lithium battery intelligent internal circulation heat dissipation system A1 of the embodiment (2) of the present invention, it is disclosed that one of the ways to increase the power capacity of the present invention is to stack more layers of power modules, such as the first Three power modules 6 and a fourth power module 7, the liquid inlet pipe 3 further includes a second liquid inlet branch pipe 32, the second liquid inlet branch pipe 32 is located at the end of the liquid inlet pipe 3, the first liquid inlet branch pipe 31 Located at a position closer to the front end of the second liquid inlet branch pipe 32, in this embodiment (2), the liquid inlet pipe 3 extends from bottom to top to approach each power module, and the first liquid inlet branch pipe 31 is located at a lower position , The second liquid inlet branch pipe 32 is located at a higher position, the second liquid inlet branch pipe 32 includes a third device liquid supply port 321 and a fourth device liquid supply port 322, the fourth device liquid supply port 322 is located in the second At the end of the liquid inlet branch pipe 32, the liquid supply port 321 of the third device is located at the front end of the liquid supply port 322 of the fourth device. The liquid discharge pipe 4 further includes a second liquid discharge branch pipe 42 and a second liquid discharge branch pipe 42 It is located at a position higher than the front end of the first discharge branch pipe 41, so that the first discharge branch pipe 41 is located at the end of the discharge pipe 4; in the present invention, the names of the front end and the end are only for illustration, and do not indicate or restrict the inlet The flow direction of the fluid inside the pipe 3 and the drain pipe 4. In this embodiment (2), the drain pipe 4 extends from the bottom to the top to leave each power module, and the first drain branch pipe 41 is located at the lower Position, the second discharge branch pipe 42 is located at a higher position; the second discharge branch pipe 42 includes a third device discharge port 422 and a fourth device discharge port 421, and the fourth device discharge port 421 is located at the At the end of the second discharge branch pipe 42, the third device discharge port 422 is located at a position closer to the front end of the fourth device discharge port 421.

The third power module 6 includes a third housing 60 and a third power unit (not shown). The third housing 60 includes a third liquid inlet 601 and a third liquid discharge hole 602. The third power unit (not shown) Drawing) is fixed in the third housing 60, and there is a third space (not drawn) for fluid flow between the third housing 60 and the third power unit (not drawn), the third liquid inlet 601 and the third The drain hole 602 communicates with the third space (not drawn), the third power unit (not drawn) includes a third thermal sensing element (not drawn) to detect the temperature in the third power unit (not drawn), and the fourth The power module 7 includes a fourth housing 70 and a fourth power unit (not shown). The fourth housing 70 includes a fourth liquid inlet 701 and a fourth discharge hole 702. The fourth power unit (not shown) It is fixed in the fourth housing 70, and between the fourth housing 70 and the fourth power unit (not shown) there is a fourth space (not shown) for fluid to flow, the fourth liquid inlet 701 and the fourth liquid drain The hole 702 communicates with the fourth space (not drawn), the fourth power unit (not drawn) includes a fourth thermal sensing element (not drawn) to detect the temperature in the fourth power unit (not drawn), and the third device provides The liquid port 321 is detachably combined with the third liquid inlet hole 601, the fourth device liquid inlet 322 is detachably combined with the fourth liquid inlet hole 701, and the third device discharge port 422 is detachably combined with the fourth liquid drain Hole 702, the fourth device discharge port 421 is detachably watertightly combined with the third discharge hole 602, the third power unit (not shown) and the fourth power unit (not shown) are electrically connected to the control unit 51, and the heat dissipation fluid (not shown) (Drawing) is filled in the first space 12, the second space (not drawn), the third space (not drawn), the fourth space (not drawn), the liquid inlet pipe 3, the liquid discharge pipe 4, and the circulating heat dissipation module. The third and fourth power units (not drawn), and the third and fourth spaces (not drawn) are respectively arranged in the third power module 6 and the fourth power module 7 as the first power unit 11 and the first power unit 11 and the fourth power module 7 respectively. The arrangement of a space 12 in the first power module 1 is omitted in the figure.

In this way, when the embodiment (2) of the present invention is in operation, the heat dissipation fluid (not shown) flows out of the circulating pump 5 into the liquid inlet pipe 3, and then moves to the first liquid inlet branch pipe 31 and the second liquid inlet branch pipe 32 , Since the liquid inlet pipe 3 extends from bottom to top, the first liquid inlet branch pipe 31 is located at a position higher than the front end of the second liquid inlet branch pipe 32, and the heat dissipation fluid (not shown) will first enter the first liquid inlet branch pipe 31 And through the first device to the liquid port 311 and the second device to the liquid port 312 are distributed to the first power module 1 and the second power module 2, the heat dissipation fluid (not shown) enters the second liquid inlet branch pipe 32 and passes through The third device liquid port 321 and the fourth device liquid port 322 are allocated to the third power module 6 and the fourth power module 7, and flow into the third power module 6 and then into the fourth power module 7.

In this embodiment (2), the discharge pipe 4 extends from bottom to top, and the second discharge branch pipe 42 is located at a position higher than the front end of the first discharge branch pipe 41, so that the first discharge branch pipe 41 is located The end of the discharge pipe 4, so the heat dissipation fluid (not shown) flowing out of the second discharge branch pipe 42 can enter the discharge pipe 4 earlier than the heat dissipation fluid (not shown) flowing out of the first discharge branch pipe 41. The heat dissipating fluid (not shown) flowing out of the third power module 6 and the fourth power module 7 will enter the drain pipe 4 earlier than the heat dissipating fluid (not shown) flowing out of the first power module 1 and the second power module 2; The heat dissipation fluid (not shown) flowing out of the fourth power module 7 is earlier than that of the third power module 6, and the heat dissipation fluid (not shown) flowing out of the second power module 2 is earlier than the first power module 1. Achieve a "first-in-last-out" state, so that the first power module 1, the second power module 2, the third power module 6 and the fourth power module 7 in the same circulation system can get an equal heat dissipation effect, without the need Installing independent circulation systems for individual power modules can save the cost of independently managing the flow of heat dissipation fluid, and can also average the overall heat dissipation effect. This embodiment (2) is a 2×2 power module configuration. You can also continue to add more power module configurations upwards, as long as you continue to add the liquid inlet branch pipe at the end of the liquid inlet pipe 3, and add the liquid outlet pipe Add a liquid discharge branch pipe to the front end of 4, and then connect the newly added liquid inlet branch pipe and the liquid discharge branch pipe to the newly added power modules.

There may be a first inlet flow valve (not shown) between the inlet pipe 3 and the first inlet branch pipe 31, and there may be a second inlet flow valve (not shown) between the inlet pipe 3 and the second inlet branch pipe 32. Not shown), there may be a first discharge flow valve (not shown) between the discharge pipe 4 and the first discharge branch pipe 41, and there may be a second row between the discharge pipe 4 and the second discharge branch pipe 42 Liquid flow valve (not drawn), first inlet flow valve (not drawn), second inlet flow valve (not drawn), first discharge flow valve (not drawn), and second discharge flow valve are electrical respectively Connect the control unit 51. In this way, if a separate power module needs to be repaired, the corresponding inlet branch pipe and drain branch pipe can be closed through the control unit 51 to stop the heat dissipation fluid (not drawn) from entering, and the maintenance personnel can safely remove the single For repair or replacement of power modules, all power modules in operation will not have to be stopped due to the problem of a single power module.

In the sixth and seventh figures, in the lithium battery intelligent internal circulation heat dissipation system A2 of the embodiment (3) of the present invention, it is disclosed that one of the ways to increase the power capacity of the present invention is to add a single inlet branch pipe and a single row The number of power modules connected to the liquid branch pipe, for example, add a fifth power module 8 between the first power module 1 and the second power module 2, and the first liquid inlet branch pipe 31 of the liquid inlet pipe 3 is further Contains a fifth device liquid supply port 313. The fifth device liquid supply port 313 is located between the first device liquid supply port 311 and the second device liquid supply port 312. The first discharge branch pipe 41 of the discharge pipe 4 further includes A fifth device drain port 413, the fifth device drain port 413 is located between the first device drain port 412 and the second device drain port 411; the fifth power module 8 includes a fifth housing 80 and a first Five power units (not shown). The fifth housing 80 includes a fifth liquid inlet 801 and a fifth discharge hole 802. The fifth power unit (not shown) is fixed in the fifth housing 80, and the fifth housing 80 There is a fifth space (not shown) for fluid to flow between the housing 80 and the fifth power unit (not shown). The fifth liquid inlet hole 801 and the fifth liquid discharge hole 802 are connected to the fifth space (not shown). The power unit (not shown) includes a fifth thermal sensing element (not shown) to detect the temperature in the fifth power unit (not shown), and the fifth device liquid inlet 313 is detachably combined with the fifth liquid inlet hole. 801, the fifth device discharge port 413 is detachably watertightly combined with the fifth discharge hole 802, the fifth power unit (not shown) is electrically connected to the control unit 51, and the heat dissipation fluid (not shown) is filled in the first space 12, The second space (not drawn), the fifth space (not drawn), the liquid inlet pipe 3, the liquid discharge pipe 4 and the circulating heat dissipation module.

In the third embodiment, the first power module 1, the fifth power module 8 and the second power module 2 are arranged in parallel on the first liquid inlet branch pipe 31 and the first liquid discharge branch pipe 41, so the liquid inlet sequence is It is the first power module 1→the fifth power module 8→the second power module 2, and the drainage sequence is the second power module 2→the fifth power module 8→the first power module 1. In the “out” state, the flow of the heat dissipation fluid (not shown) between the first power module 1, the fifth power module 8 and the second power module 2 can still be evened.

In the eighth figure, in the embodiment (4) of the present invention, several lithium battery intelligent internal circulation heat dissipation system A3 can be further arranged as an energy storage device, and the number of power modules contained in the lithium battery intelligent internal circulation heat dissipation system A3 can be According to the owner's energy storage demand and in accordance with the "first in last out" principle of the present invention, the plan is arranged so that the present invention can flexibly respond to the energy storage demand of different industries.

However, the above are only the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. Any changes and modifications that can be obviously made by those who are accustomed to the industry should be regarded as not deviating from them. The essence of the present invention.

A: Lithium battery intelligent internal circulation cooling system A1: Lithium battery intelligent internal circulation cooling system A2: Lithium battery intelligent internal circulation cooling system A3: Lithium battery intelligent internal circulation cooling system 1: The first power module 10: The first shell 101: The first liquid inlet 102: The first drain hole 11: The first power unit 12: The first space 2: The second power module 20: second shell 201: The second liquid inlet 202: second drain hole 3: Liquid inlet pipe 31: The first liquid inlet branch pipe 311: The first device to the liquid port 312: The second device to the liquid port 313: The fifth device to the liquid port 32: The second liquid inlet branch pipe 321: The third device to the liquid port 322: The fourth device to the liquid port 4: Drain pipe 41: First discharge branch pipe 411: The second device drain 412: The first device drain 413: Fifth device drain 42: The second discharge branch pipe 421: The fourth device drain 422: The third device drain 5: Circulating pump 51: control unit 52: cooling unit 521: cold row 522: Fan 6: The third power module 60: third shell 601: third inlet 602: third drain hole 7: The fourth power module 70: The fourth shell 701: Fourth Inlet Hole 702: The fourth drain hole 8: The fifth power module 80: Fifth shell 801: Fifth liquid inlet 802: Fifth drain hole

The first figure is a perspective view of embodiment (1) of the present invention. The second picture is an exploded view of the first picture. The third figure is a partial enlarged view of the second figure. The fourth figure is a three-dimensional view of embodiment (2) of the present invention. The fifth picture is a partially enlarged exploded view of the fourth picture. The sixth figure is a three-dimensional view of the embodiment (3) of the present invention. The seventh picture is a partially enlarged exploded view of the sixth picture. The eighth figure is a schematic diagram of the embodiment (4) of the present invention.

no

1: The first power module

10: The first shell

11: The first power unit

12: The first space

2: The second power module

3: Liquid inlet pipe

31: The first liquid inlet branch pipe

4: Drain pipe

41: First discharge branch pipe

5: Circulating pump

51: control unit

52: cooling unit

521: cold row

522: Fan

Claims (7)

A lithium battery intelligent internal circulation heat dissipation system, comprising: a first power module comprising a first housing and a first power unit, the first housing comprising a first liquid inlet and a first discharge hole, The first power unit is fixed in the first housing, and there is a first space for fluid to flow between the first housing and the first power unit, the first liquid inlet hole and the first liquid drain hole Connecting to the first space, the first power unit includes a first thermal sensing element to detect the temperature in the first power unit; a second power module includes a second housing and a second power unit , The second housing includes a second liquid inlet hole and a second liquid drain hole, the second power unit is fixed in the second housing, and there is a supply between the second housing and the second power unit The second space where fluid flows, the second liquid inlet hole and the second liquid discharge hole communicate with the second space, and the second power unit includes a second thermal sensing element to detect the temperature in the second power unit ; A liquid inlet pipe, which includes a first liquid inlet branch pipe, the first liquid inlet branch pipe includes a first device to the liquid port and a second device to the liquid port, the second device to the liquid port is located in the first At the end of a liquid inlet branch pipe, the liquid supply port of the first device is located at a position higher than the front end of the liquid supply port of the second device, the liquid supply port of the first device is detachably combined with the first liquid inlet hole, and the second device The liquid supply port of the device is detachably combined with the second liquid inlet hole; a liquid discharge pipe includes a first liquid discharge branch pipe, and the first liquid discharge branch pipe comprises a first device discharge port and a second liquid discharge port. Device discharge port, the second device discharge port is located at the end of the first discharge branch pipe, the first device discharge port is located at the front end of the second device discharge port, the first device discharge port The second drain hole is detachably watertightly combined, and the second device drain hole is detachably watertightly combined with the first drain hole; A circulating heat dissipation module, which includes a circulating pump, a control unit, and a heat dissipation unit. The heat dissipation unit includes a cold exhaust and a fan. The control unit is electrically connected to the circulation pump, the fan, the first power unit, and In the second power unit, one end of the circulating pump is connected to the cold row, the other end of the circulating pump is connected to the inlet pipe, and the other end of the cold row is connected to the drain pipe; and an insulating vegetable oil filled in the first In a space, the second space, the liquid inlet pipe, the liquid discharge pipe and the circulating heat dissipation module, the insulated vegetable oil is pushed by the circulating pump to circulate. For example, the lithium battery intelligent internal circulation heat dissipation system of claim 1, wherein the liquid inlet pipe further includes a second liquid inlet branch pipe, the second liquid inlet branch pipe is located at the end of the liquid inlet pipe, and the first liquid inlet branch pipe Located at a position closer to the front end of the second liquid inlet branch pipe, the second liquid inlet branch pipe includes a third device liquid supply port and a fourth device liquid supply port, and the fourth device liquid supply port is located at the second liquid inlet At the end of the branch pipe, the liquid supply port of the third device is located at a position higher than the front end of the liquid supply port of the fourth device, and the liquid discharge pipe further includes a second liquid discharge branch pipe. The position of the front end of a discharge branch pipe makes the first discharge branch pipe located at the end of the discharge pipe, and the second discharge branch pipe includes a third device discharge port and a fourth device discharge port. The fourth device discharge port is located at the end of the second discharge branch pipe, the third device discharge port is located at a position higher than the front end of the fourth device discharge port; and there is a third power module and a fourth power Module, the third power module includes a third housing and a third power unit, the third housing includes a third liquid inlet and a third discharge hole, the third power unit is fixed on the first There is a third space for fluid flow between the third housing and the third power unit. The third liquid inlet and the third liquid discharge hole are connected to the third space. The third power The unit includes a third thermal sensing element to detect the temperature in the third power unit, the fourth power module includes a fourth housing and a fourth power unit, and the fourth housing includes a fourth liquid inlet And a fourth drain hole, the fourth power unit is fixed in the fourth housing, and the fourth housing and the fourth power unit There is a fourth space for fluid to flow between, the fourth liquid inlet hole and the fourth liquid discharge hole communicate with the fourth space, and the fourth power unit includes a fourth thermal sensing element to detect the fourth power The temperature in the unit, the third device's liquid supply port is detachably combined with the third liquid inlet, the fourth device's liquid supply port is detachably combined with the fourth liquid inlet, and the third device's liquid outlet The fourth discharge hole is detachably watertightly combined with the fourth device discharge port, the third discharge hole is detachably combined with the fourth device discharge hole, the third power unit and the fourth power unit are electrically connected to the control unit, the The insulating vegetable oil is filled in the first space, the second space, the third space, the fourth space, the liquid inlet pipe, the liquid discharge pipe, and the circulating heat dissipation module. For example, the lithium battery intelligent internal circulation heat dissipation system of claim 2, wherein there is a first liquid inlet flow valve between the liquid inlet pipe and the first liquid inlet branch pipe, and between the liquid inlet pipe and the second liquid inlet branch pipe There is a second liquid inlet flow valve, a first liquid discharge flow valve is provided between the liquid discharge pipe and the first liquid discharge branch pipe, and a second liquid discharge flow volume is provided between the liquid discharge pipe and the second liquid discharge branch pipe The first liquid inlet flow valve, the second liquid inlet flow valve, the first liquid discharge flow valve and the second liquid discharge flow valve are respectively electrically connected to the control unit. Such as the lithium battery intelligent internal circulation heat dissipation system of claim 1, wherein the first liquid inlet branch pipe of the liquid inlet pipe further includes a fifth device liquid supply port, and the fifth device liquid supply port is located at the first device liquid supply port Between the liquid supply port of the second device and the liquid discharge port of the second device, the first liquid discharge branch pipe of the liquid discharge pipe further includes a fifth device liquid discharge port. The fifth device liquid discharge port is located between the first device liquid discharge port and the first device liquid discharge port. Between the two device discharge ports; and further a fifth power module, the fifth power module includes a fifth housing and a fifth power unit, the fifth housing includes a fifth liquid inlet and a fifth A drain hole, the fifth power unit is fixed in the fifth housing, and there is a fifth space for fluid to flow between the fifth housing and the fifth power unit, the fifth liquid inlet and the first Five liquid drain holes communicate with the fifth space, the fifth power unit includes a fifth thermal sensing element to detect the temperature in the fifth power unit, and the fifth device feeds the liquid port The fifth liquid inlet is detachably combined with the fifth liquid inlet, the fifth device discharge opening is detachably combined with the fifth liquid discharge hole, the fifth power unit is electrically connected to the control unit, and the insulating vegetable oil is filled in the first A space, the second space, the fifth space, the liquid inlet pipe, the liquid discharge pipe, and the circulating heat dissipation module. For the lithium battery intelligent internal circulation heat dissipation system of any one of claim 1, 2, and 4, there is a first check valve between the circulation pump and the liquid inlet pipe, and there is a first check valve between the cold exhaust pipe and the liquid discharge pipe. The second check valve. Such as the lithium battery intelligent internal circulation heat dissipation system of any one of claims 1, 2, and 4, the insulating vegetable oil is a non-conductive oil. For example, in the lithium battery intelligent internal circulation heat dissipation system of any one of claim 1, 2, and 4, the liquid inlet pipe has a liquid inlet heat induction unit, the drain pipe has a liquid discharge heat induction unit, and the liquid inlet heat induction unit And the liquid discharge heat induction unit is electrically connected to the control unit.

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