CN115360408A - A lithium-ion battery system for outdoor energy storage - Google Patents

Abstract

The invention discloses a lithium ion battery system for outdoor energy storage, which relates to the field of lithium ion batteries and comprises a shell, wherein a lithium battery pack is arranged in an inner cavity of the shell, the lithium battery pack is formed by connecting a plurality of lithium batteries in parallel, and a water storage tank is arranged on the inner wall of the shell. The inner chamber of storage water tank is provided with the water pump, install the inlet tube on the water pump, the one end of inlet tube is connected with first radiating piece, and extends in the inner chamber of storage water tank the other end of inlet tube, the below of first radiating piece is provided with the second radiating piece. The invention can carry out heat dissipation work on the lithium battery pack used outdoors, increase the heat exchange time, fully carry out the heat exchange of the lithium battery combined air, and simultaneously cool the bottom of the lithium battery pack, improves the defects that the bottom of the traditional lithium battery pack is attached to a shell and the heat dissipation is slow, improves the cooling effect, and can effectively protect the lithium battery pack.

Description

A lithium-ion battery system for outdoor energy storage

technical field

The invention relates to the field of lithium electronic batteries, in particular to a lithium electronic battery system for outdoor energy storage.

Background technique

A lithium-ion battery, or LIB for short, is a rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and return during charging. In contrast to metallic lithium used in non-rechargeable lithium batteries, lithium-ion batteries use intercalated lithium compounds as electrode materials. Batteries have high energy density.

The existing lithium-ion battery packs used in energy storage cabinets are prone to heat accumulation during operation. In summer high-temperature environments, outdoor high-temperature environments and the heat generated by lithium-ion battery packs during operation make lithium-ion batteries The surface of the electronic battery pack is in a high-temperature state, and high-temperature operation will accelerate the increase in the internal resistance of the battery and accelerate the aging of the battery. At the same time, the lithium-ion battery pack is also prone to high-temperature failures, which will affect its normal power supply.

Contents of the invention

In view of the above problems, the present application provides a lithium electronic battery system for outdoor energy storage.

In order to achieve the above purpose, the present application provides the following technical solutions: a lithium electronic battery system for outdoor energy storage, including a casing, the inner cavity of the casing is provided with a lithium battery pack, and the lithium battery pack is composed of a plurality of lithium batteries It is configured in parallel, and a water storage tank is arranged on the inner wall of the housing.

The inner cavity of the water storage tank is provided with a water pump, and a water inlet pipe is installed on the water pump. One end of the water inlet pipe is connected to a first heat sink, and the other end of the water inlet pipe extends to the inner cavity of the water storage tank. A second heat sink is arranged below the first heat sink. When the water pump drives the cooling fluid inside the water storage tank to flow, the coolant passes through the first heat sink and the second heat sink in sequence.

The further improvement of the technical solution of the present invention lies in that the first cooling element includes a shunt pipe connected to the end of the water inlet pipe, guide pipes are fixed at the openings at both ends of the shunt pipe, and the bottom end of the guide pipe is fixed There are side pipes.

The guide tube is arranged in an L shape, and the side tube is in the shape of a serpentine coil. In a natural state, the side tube is located on the side of the lithium battery pack, and the coolant is located inside the side tube and circulates in a serpentine shape until Flows below the lithium battery pack.

The further improvement of the technical solution of the present invention is that the second heat sink includes a bottom pipe fixed at the end of the side pipe, and the other end of the bottom pipe is fixed with a return pipe, and the return pipe is provided with a cooling cavity .

The bottom pipe is in the shape of a serpentine coil. When the coolant passes through the first heat sink and the second heat sink in sequence, the coolant flows into the return pipe and the cooling cavity until the coolant enters the storage tank again. The inside of the tank.

A further improvement of the technical solution of the present invention is that the cooling cavity includes a tapered portion, and a plurality of heat dissipation rings are fixed on the outer surface of the tapered portion, and the outer surface of the heat dissipation ring is protruded in a sheet shape.

A further improvement of the technical solution of the present invention is that a positioning beam is fixed below the inner cavity of the housing, and a plurality of positioning columns are fixed on the top of the positioning beam.

The outer surface of the positioning column is clamped with internal strips, and a plurality of heat sinks are fixed on the side of the internal strips. When the internal strips are installed on the positioning column, the internal strips and heat sinks are located Below the lithium battery pack, and the cooling fins are located inside a pair of bottom tubes.

A further improvement of the technical solution of the present invention is that a bearing plate is clamped above the positioning column, and in a natural state, the bearing plate is attached to the bottom of the lithium battery pack.

A further improvement of the technical solution of the present invention lies in that a ventilation window is provided on the outer side of the housing.

A further improvement of the technical solution of the present invention lies in that a cover is detachably connected to the top of the housing.

In sum, technical effect and advantage of the present invention:

The invention can dissipate heat from the lithium battery pack used outdoors, increase the heat exchange time, fully exchange the heat between the lithium battery and the air, and at the same time cool down the bottom of the lithium battery pack from time to time, aiming at the traditional lithium battery Improvements have been made to the disadvantages of the bottom of the battery pack fitting the shell and slow heat dissipation, which improves the cooling effect and effectively protects the lithium-ion battery pack. In addition, it can effectively reduce the situation that the cooling liquid circulates for a long time in an outdoor extreme high temperature environment, which leads to the reduction of heat dissipation efficiency, and ensures the heat exchange efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a schematic diagram of the structure when the lithium battery pack is installed inside the casing and the cover in the present invention.

Fig. 3 is a schematic diagram of the location and structure of the first heat dissipation component of the lithium battery assembly of the present invention.

Fig. 4 is a schematic diagram of the location and structure of the water storage tank and the second heat dissipation assembly of the present invention.

Fig. 5 is a schematic diagram of the positions and structures of the first heat dissipation component and the second heat dissipation component of the present invention.

Fig. 6 is a schematic diagram of the enlarged structure at A in Fig. 5 of the present invention.

Fig. 7 is a structural schematic diagram of the positioning beam, the positioning column, the inner strip, the cooling fin and the bearing plate of the present invention.

In the figure: 1. shell; 2. lithium battery pack; 3. water storage tank; 4. water inlet pipe; 5. shunt pipe; 6. guide pipe; 7. side pipe; 8. bottom pipe; 9. return pipe; 10 , cooling cavity; 1001, tapered part; 1002, cooling ring; 11, positioning beam; 12, positioning column; body.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment 1: Referring to a lithium electronic battery system for outdoor energy storage shown in Figure 1-2, it includes a housing 1, the inner cavity of the housing 1 is provided with a lithium battery pack 2, and the lithium battery pack 2 is composed of a plurality of lithium batteries It is configured in parallel, and a water storage tank 3 is arranged on the inner wall of the casing 1 . Coolant is stored inside the water storage tank 3, and the water storage tank 3 is a metal water tank in the prior art.

The inner chamber of the water storage tank 3 is provided with a water pump, and the water inlet pipe 4 is installed on the water pump. One end of the water inlet pipe 4 is connected with a first heat sink, and the other end of the water inlet pipe 4 extends in the inner chamber of the water storage tank 3. The first heat sink A second heat sink is arranged below the water tank 3, and when the water pump drives the coolant inside the water storage tank 3 to flow, the coolant passes through the first heat sink and the second heat sink in sequence. Inside the casing 1, the first heat sink and the second heat sink are distributed on the outside of the lithium battery pack 2. When the cooling liquid flows through the first heat sink and the second heat sink, a heat sink is generated outside the lithium battery pack 2. Heat exchange reduces the temperature of the lithium battery pack 2 during operation.

As shown in Fig. 3 and Fig. 4, the first cooling element includes a shunt pipe 5 connected to the end of the water inlet pipe 4, guide pipes 6 are fixed at the openings at both ends of the shunt pipe 5, and guide pipes 6 are fixed at the bottom of the guide pipe 6. Side pipe 7.

The guide pipe 6 is arranged in an L shape, and the side pipe 7 is in the shape of a serpentine coil. In a natural state, the side pipe 7 is located on the side of the lithium battery pack 2, and the coolant is located inside the side pipe 7 and circulates in a serpentine shape until it flows into the lithium battery. Group 2 below. The purpose of the side pipes 7 being distributed in a serpentine coil shape is to increase the circulation time of water, further increase the heat exchange time when the coolant circulates, and fully exchange heat between the lithium battery pack 2 and the air to further improve the cooling effect.

As shown in Figures 3 and 4, the second heat sink includes a bottom pipe 8 fixed to the end of the side pipe 7, and the other end of the bottom pipe 8 is fixed with a return pipe 9, and the return pipe 9 is provided with a cooling cavity 10 .

The bottom pipe 8 is in the shape of a serpentine coil. When the coolant passes through the first heat sink and the second heat sink in sequence, the coolant flows into the return pipe 9 and the cooling cavity 10 until the coolant enters the water storage tank 3 again.

After passing through the first cooling assembly, the cooling liquid can enter the second cooling assembly under the action of gravity. The bottom pipe 8 inside the second cooling assembly is located below the lithium battery pack 2. When the cooling liquid flows inside the bottom pipe 8, it can cool the lithium battery. The bottom of the battery pack 2 is cooled to improve the traditional lithium battery pack 2 , which has the disadvantages of the bottom shell fitting together and slow heat dissipation. The bottom tube 8 is also distributed in a serpentine coil shape, which improves the cooling effect.

As shown in FIG. 6 , the cooling cavity 10 includes a tapered portion 1001 , and a plurality of heat dissipation rings 1002 are fixed on the outer surface of the tapered portion 1001 . When the air passes through the cooling cavity 10, the tapered portion 1001 on the surface of the cooling cavity 10 can accelerate the speed of the accelerated wind, and can contact the air more comprehensively. At the same time, the heat dissipation ring 1002 can exchange heat between the cooling liquid inside the cooling chamber 10 and the outside air, increasing the speed of heat exchange. The heat dissipation ring 1002 is made of copper, which has good heat dissipation performance. The temperature of the cooling liquid inside the cooling cavity 10 is lowered, the cooling of the water is accelerated, and the cooling effect on the water is improved.

The cooling liquid passes through the return pipe 9, and after the cooled cavity 10 is cooled, it can enter the interior of the water storage tank 3 again. Further, under the action of the water pump, the cooling liquid can flow into the first heat dissipation assembly and the second heat dissipation assembly again. , in order to achieve the recycling of coolant, and make full use of resources.

Embodiment 2: As shown in Fig. 5 and Fig. 7, in order to avoid the temperature rise after the cooling fluid flows through the first heat sink and the second heat sink in an outdoor high-temperature environment, resulting in the subsequent heat dissipation efficiency of the lower part of the lithium battery pack 2 reduced condition. In the following way:

A positioning beam 11 is fixed below the inner cavity of the housing 1 , and a plurality of positioning columns 12 are fixed on the top of the positioning beam 11 . The outer surface of the positioning column 12 is clamped with an internal bar 13, and a plurality of cooling fins 14 are fixed on the side of the internal bar 13. When the internal bar 13 is installed on the positioning column 12, the internal bar 13 and the cooling fins 14 are located Below the lithium battery pack 2 , and the cooling fins 14 are located inside the pair of bottom tubes 8 .

The heat sink 14 is located under the lithium battery pack 2, which can accelerate the heat dissipation speed under the lithium battery pack 2. At the same time, it can further accelerate the heat exchange speed of the bottom pipe 8. When the cooling liquid flows through the first heat sink and the second heat sink When the components are used, the heat exchange efficiency when the coolant circulates inside the bottom pipe 8 can be ensured.

As shown in FIG. 7 , a bearing plate 15 is clamped above the positioning column 12 , and in a natural state, the bearing plate 15 is attached to the bottom of the lithium battery pack 2 . When disassembling the heat sink 14, the lithium battery pack 2 can be taken out, and then the carrying plate 15 is lifted upwards until the carrying plate 15 breaks away from the positioning column 12, and then the internal strip 13 and the heat sink 14 are taken out synchronously.

After taking out the cooling fins 14, the cooling fins 14 can be cleaned to reduce the adhesion of dust to the cooling fins 14, and to clean the multiple sets of internal strips 13 and the cooling fins 14. To ensure the long-term use of heat sink 14

As shown in FIG. 2 , a ventilation window 16 is provided on the outside of the housing 1 . The vent window 16 is provided with a plurality of through holes, so that the air can smoothly flow into the inside of the casing 1, so that the heat dissipation work can be carried out smoothly. At the same time, a water-retaining eaves is provided outside the through hole to prevent rainwater from entering the interior of the housing 1 through the through hole, effectively avoiding the short circuit phenomenon caused by the lithium battery pack 2 contacting rainwater.

As shown in Figure 2, a cover 17 is detachably connected to the top of the housing 1. When the lithium battery pack 2 is used outdoors, the combination of the cover 17 and the housing 1 has a protective effect on the lithium battery pack 2, so that The lithium battery pack can also operate normally in humid and rainy weather, effectively preventing external impurities from contacting the lithium battery pack 2, so as to ensure the safety performance of the lithium battery pack 2 during charging and discharging.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (8)

1. A lithium electronic battery system for outdoor energy storage, characterized in that: it comprises a housing (1), the inner chamber of the housing (1) is provided with a lithium battery pack (2), and the lithium battery pack (2 ) is composed of a plurality of lithium batteries connected in parallel, and a water storage tank (3) is arranged on the inner wall of the housing (1); The inner cavity of the water storage tank (3) is provided with a water pump, and a water inlet pipe (4) is installed on the water pump, and one end of the water inlet pipe (4) is connected with a first heat sink, and the other end of the water inlet pipe (4) One end extends to the inner cavity of the water storage tank (3), and a second heat sink is arranged below the first heat sink. When the water pump drives the cooling liquid inside the water storage tank (3) to flow, the cooling liquid passes through the cooling liquid sequentially. Describe the first heat sink and the second heat sink. 2. The lithium-ion battery system for outdoor energy storage according to claim 1, characterized in that: the first cooling element includes a shunt pipe (5) connected to the end of the water inlet pipe (4), and the shunt pipe (5) guide tubes (6) are fixed at the openings at both ends, and side tubes (7) are fixed at the bottom of the guide tubes (6); The guide pipe (6) is arranged in an L shape, and the side pipe (7) is in the shape of a serpentine coil. In a natural state, the side pipe (7) is located on the side of the lithium battery pack (2), and the cooling The liquid is located inside the side pipe (7) and circulates in a serpentine shape until it flows under the lithium battery pack (2). 3. The lithium-ion battery system for outdoor energy storage according to claim 2, characterized in that: the second heat sink includes a bottom pipe (8) fixed to the end of the side pipe (7), and the bottom The other end of the pipe (8) is fixed with a return pipe (9), and the return pipe (9) is provided with a cooling cavity (10); The bottom pipe (8) is in the shape of a serpentine coil. When the cooling liquid passes through the first heat sink and the second heat sink in sequence, the cooling liquid flows into the return pipe (9) and the cooling cavity (10). , until the coolant enters the inside of the water storage tank (3) again. 4. The lithium-ion battery system for outdoor energy storage according to claim 3, characterized in that: the cooling cavity (10) includes a tapered portion (1001), and the outer surface of the tapered portion (1001) A plurality of heat dissipation rings (1002) are fixed, and the outer surface of the heat dissipation rings (1002) protrudes in a sheet shape. 5. The lithium-ion battery system for outdoor energy storage according to claim 3, characterized in that: a positioning beam (11) is fixed below the inner cavity of the housing (1), and the positioning beam (11) The top is fixed with a plurality of positioning posts (12); The outer surface of the positioning column (12) is clamped with an internal bar (13), and a plurality of cooling fins (14) are fixed on the side of the internal bar (13). When the positioning column (12) is installed When there are built-in strips (13), the built-in strips (13) and cooling fins (14) are located under the lithium battery pack (2), and the cooling fins (14) are positioned between the pair of bottom tubes (8) inside. 6. The lithium-ion battery system for outdoor energy storage according to claim 5, characterized in that: a bearing plate (15) is clamped above the positioning column (12), and in a natural state, the bearing plate (15) ) fit the bottom of the lithium battery pack (2). 7. The lithium-ion battery system for outdoor energy storage according to claim 1, characterized in that: a breathable window (16) is provided on the outside of the casing (1). 8. The lithium-ion battery system for outdoor energy storage according to claim 1, characterized in that a cover (17) is detachably connected to the top of the housing (1).

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