A lithium ion battery module liquid cooling device

Abstract

The utility model provides lithium ion battery module liquid cooling device relates to the field of battery pack this lithium ion battery module liquid cooling device, including battery frame, the inside fixedly connected with equidistance arrangement's partition board of battery frame is provided with water inlet pipe and return pipe outside battery frame, the inside all be provided with cooling mechanism every partition board, cooling mechanism includes sealing cover, heat exchange elbow and two acceleration pipe, this lithium ion battery module liquid cooling device, through partition board will be divided into several storage space in battery frame, and then the battery module is evenly distributed to the distribution space inside, improve the heat dissipation efficiency to battery module, through sealing cover, to the partition board is sealed, through acceleration pipe, to the cooling liquid flowing in heat exchange elbow inside is accelerated, and then improve heat exchange elbow cooling efficiency and heat dissipation effect, through two fixed plate, to heat exchange elbow and acceleration pipe are sealed, improve heat exchange elbow and the stability of acceleration pipe operation.

Description

Technical Field

[0001] This utility model relates to a liquid cooling device for battery modules, specifically a liquid cooling device for lithium-ion battery modules, belonging to the field of battery pack technology. Background Technology

[0002] A battery pack is a power supply device formed by combining multiple individual cells in series or parallel. The original battery pack "stack," constructed using zinc-copper electrodes and electrolyte, laid the foundation for the development of devices such as electric motors and generators. Parallel battery packs require identical cell voltages to increase output current, while series structures can meet the requirements of high-voltage devices by superimposing voltages.

[0003] The utility model patent CN215955392U discloses a liquid cooling device for a lithium-ion battery module, including a shell with an outer frame and multiple partition plates. The outer frame forms a lithium battery receiving cavity. The multiple partition plates are all disposed in the lithium battery receiving cavity, dividing the lithium battery receiving cavity into single lithium battery receiving cavities. The single lithium battery receiving cavity is used to accommodate lithium batteries. Longitudinal channels are opened on the partition plates, and transverse channels connect the longitudinal channels on the multiple partition plates. The liquid inlet and liquid outlet of the cooling channel are located on the outer frame, thereby ensuring that the three side walls of the single lithium battery receiving cavity have cooling channels, ensuring the cooling effect of the single lithium battery.

[0004] When the battery pack is running, it generates a lot of heat. In order to ensure the normal operation of the battery pack, a cooling device is used. Although the cooling device in the above patent ensures the cooling effect of the battery, the cooling channel is opened inside the outer frame. After long-term use, the curved part of the coolant is prone to blockage by debris. When a single cooling channel is blocked, the entire outer casing needs to be replaced, which increases the maintenance cost of the cooling device. Summary of the Invention

[0005] (a) Technical problems to be solved The purpose of this invention is to provide a liquid cooling device for lithium-ion battery modules to solve the above-mentioned problems, thereby addressing the issue in the prior art where the outer casing needs to be replaced after a single cooling channel becomes blocked.

[0006] (II) Technical Solution This utility model is achieved through the following technical solution: a liquid cooling device for lithium-ion battery modules.

[0007] The device includes a battery frame, with equidistant partitions fixedly connected inside the battery frame. An inlet pipe and a return pipe are provided on the outside of the battery frame. A cooling mechanism is provided inside each partition. The cooling mechanism includes a sealing cover, a heat exchange bend, and two acceleration pipes. The two ends of the heat exchange bend are fixedly connected to the two acceleration pipes respectively. Two fixing plates are fixedly connected to the surface of the sealing cover.

[0008] Preferably, each of the accelerating tubes is fixedly connected to a connecting pipe at its top end, and the top ends of both connecting pipes are penetrated by a sealing cap. The two connecting pipes are fixedly connected to the inlet pipe and the return pipe, respectively. The inlet pipe delivers coolant to the inside of the accelerating tube through the connecting pipe. After being accelerated by the accelerating tube, the coolant enters the inside of the heat exchange bend. The coolant flowing out of the heat exchange bend passes through the accelerating tube and the connecting pipe and enters the inside of the return pipe, thus completing the coolant refrigeration process.

[0009] Preferably, the surface of the acceleration tube abuts against the fixed plate, and a fixing rod is provided below the sealing cover. The two ends of the fixing rod are fixedly connected to the two fixed plates. The fixing rod fixes the bottom of the two fixed plates together, preventing the two fixed plates from shaking randomly and improving the stability of the operation of the two fixed plates.

[0010] Preferably, a connecting plate is fixedly connected to the surface of the heat exchange bend, and a heat exchange plate is fixedly connected to the surface of the connecting plate. Thermal grease is filled between the heat exchange plate and the fixed plate. The heat exchange plate is fixed to both sides of the heat exchange bend through the connecting plate. With the heat exchange plate in close contact with the fixed plate, the cold source transported inside the heat exchange bend can be transferred to the fixed plate to cool it down, thereby enabling the separator plate to dissipate heat and cool the battery module.

[0011] Preferably, the sealing cover is slidably connected to the partition plate, the top of the partition plate is fixedly connected to a limiting block, and the bottom of the sealing cover abuts against the limiting block. The limiting block limits the sealing cover and seals the sealing cover, preventing the internal pipes of the partition plate from rupturing, causing coolant to leak to the outside and damaging the battery.

[0012] Preferably, a rotating rod is rotatably connected to the middle of the sealing cover, and two fixing rings are fixedly connected to the top of the partition plate. The two ends of the rotating rod are engaged with the two fixing rings. By rotating the rotating rod on the surface of the sealing cover, the rotating rod is engaged with the fixing rings, providing downward pressure to the sealing cover and fixing it to the top of the partition plate.

[0013] Preferably, a rotating component is engaged inside the rotating rod, the surface of the fixed plate is slidably connected to the inner wall of the partition plate, and thermal grease is filled between the fixed plate and the partition plate. The rotating component is inserted into the rotating rod to facilitate rotation of the rotating rod, thereby controlling whether the rotating rod is engaged with the fixed ring.

[0014] Preferably, the inside of the acceleration tube is fixedly connected with equidistantly arranged convex baffles, and the bottoms of the convex baffles are staggered inside the acceleration tube, with the wider side of the convex baffles located at the water inlet. The staggered arrangement of the convex baffles inside the acceleration tube creates a main stream and several tributaries inside the acceleration tube. These tributaries increase the contact range of the coolant inside the acceleration tube and also create a Tesla valve effect, accelerating the flow of coolant inside the acceleration tube.

[0015] This utility model provides a liquid cooling device for lithium-ion battery modules, which has the following beneficial effects: 1. This lithium-ion battery module liquid cooling device divides the inside of the battery frame into several storage spaces through a partition plate, thereby evenly distributing the battery modules into the distribution spaces and improving the heat dissipation efficiency of the battery modules. The partition plate is sealed by a sealing cover, and the coolant flowing inside the heat exchange bend is accelerated by an acceleration tube, thereby improving the cooling efficiency and heat dissipation effect of the heat exchange bend. The heat exchange bend and acceleration tube are sealed and fixed by two fixing plates, improving the stability of the operation of the heat exchange bend and acceleration tube.

[0016] 2. This lithium-ion battery module liquid cooling device connects two acceleration tubes to the inlet and return water pipes via two connecting pipes. The inlet water pipe delivers coolant to the acceleration tubes through the connecting pipes. After acceleration, the coolant enters the heat exchange bend. The coolant flowing out of the heat exchange bend passes through the acceleration tubes and connecting pipes into the return water pipe, thus completing the coolant cooling process. Two fixed plates are fixedly connected at their bottoms by a fixing rod to prevent them from shaking and improve their operational stability. The acceleration tubes contact the fixed plates, allowing for heat exchange. The heat exchange plates are fixed to both sides of the heat exchange bend via connecting plates. The close contact between the heat exchange plates and the fixed plates allows the cold source transported inside the heat exchange bend to be transferred to the fixed plates, cooling them and thus enabling the separator plates to cool and dissipate heat from the battery module.

[0017] 3. This lithium-ion battery module liquid cooling device uses a limiting block to limit the sealing cover and seal it, preventing the internal pipes of the separator from rupturing and causing coolant leakage to the outside, which could damage the battery. A rotating rod rotates on the surface of the sealing cover, engaging with a fixing ring and applying downward pressure to fix the sealing cover to the top of the separator. A rotating component is inserted into the rotating rod to facilitate its rotation and control whether it engages with the fixing ring. Thermal grease fills the gap between the fixing plate and the separator, improving heat exchange. Alternating convex baffles inside the acceleration tube create a main stream and several tributaries. These tributaries increase the contact area of ​​the coolant inside the acceleration tube and create a Tesla valve effect, accelerating the flow of coolant and preventing a decrease in coolant flow rate due to increased flow area. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the partition plate of this utility model; Figure 3 This is a cross-sectional view of the partition plate of this utility model; Figure 4 This is an exploded view of the cooling mechanism structure of this utility model; Figure 5 This is a cross-sectional view of the accelerator tube of this utility model.

[0019] [Explanation of Key Component Symbols] 1. Battery frame; 2. Divider; 3. Water inlet pipe; 4. Water return pipe; 5. Cooling mechanism; 501. Sealing cover; 502. Limiting block; 503. Rotating rod; 504. Fixing ring; 505. Rotating component; 506. Fixing plate; 507. Fixing rod; 508. Accelerating tube; 509. Connecting tube; 510. Heat exchange bend; 511. Connecting plate; 512. Heat exchange plate; 513. Convex stop block. Detailed Implementation

[0020] This utility model provides a liquid cooling device for lithium-ion battery modules. Example 1:

[0021] Please see Figure 1 The battery includes a battery frame 1, with equidistant partition plates 2 fixedly connected inside the battery frame 1. A water inlet pipe 3 and a water return pipe 4 are provided on the outside of the battery frame 1. The partition plates 2 divide the inside of the battery frame 1 into several storage spaces, thereby evenly distributing the battery modules into the distribution spaces and improving the heat dissipation efficiency of the battery modules.

[0022] Please refer to it again. Figure 2 , Figure 3 , Figure 4 and Figure 5 Each partition plate 2 is equipped with a cooling mechanism 5. The cooling mechanism 5 includes a sealing cover 501, a heat exchange bend 510, and two acceleration pipes 508. The two ends of the heat exchange bend 510 are fixedly connected to the two acceleration pipes 508 respectively. The partition plate 2 is sealed by the sealing cover 501, and the coolant flowing inside the heat exchange bend 510 is accelerated by the acceleration pipes 508, thereby improving the cooling efficiency and heat dissipation effect of the heat exchange bend 510.

[0023] The acceleration tube 508 is fixedly connected with equidistantly arranged convex baffles 513. The bottoms of the convex baffles 513 are staggered inside the acceleration tube 508, and the wider side of the convex baffles 513 is located at the water inlet. The staggered arrangement of the convex baffles 513 inside the acceleration tube 508 forms a main stream and several tributaries inside the acceleration tube 508. The several tributaries not only increase the contact range of the coolant inside the acceleration tube 508, but also make the acceleration tube 508 form a Tesla valve effect, which accelerates the coolant flowing inside the acceleration tube 508 and avoids the decrease in coolant flow rate caused by the expansion of the flow area.

[0024] Implementation: 2:

[0025] Each acceleration tube 508 has a fixed connection to a connecting tube 509 at its top end. The top ends of both connecting tubes 509 penetrate the sealing cap 501, and the two connecting tubes 509 are fixedly connected to the inlet pipe 3 and the return pipe 4, respectively. Through the two connecting tubes 509, the two acceleration tubes 508 are connected to the inlet pipe 3 and the return pipe 4, respectively. The inlet pipe 3 delivers coolant to the inside of the acceleration tube 508 through the connecting tube 509. After being accelerated by the acceleration tube 508, the coolant enters the heat exchange bend 510. The coolant flowing out of the heat exchange bend 510 enters the return pipe 4 through the acceleration tube 508 and the connecting tube 509, thus completing the coolant refrigeration process.

[0026] The surface of the accelerating tube 508 abuts against the fixed plate 506. A fixing rod 507 is provided below the sealing cover 501, and the two ends of the fixing rod 507 are fixedly connected to the two fixed plates 506. The fixing rod 507 fixes the bottom of the two fixed plates 506 together, preventing the two fixed plates 506 from shaking randomly and improving the stability of the operation of the two fixed plates 506. Through the contact of the accelerating tube 508 with the fixed plate 506, heat exchange can be performed on the heat transferred by the fixed plate 506.

[0027] Implementation: 3:

[0028] Please refer to it again. Figure 3 and Figure 4 Two fixing plates 506 are fixedly connected to the surface of the sealing cover 501. The heat exchange bend 510 and the acceleration tube 508 are sealed and fixed by the two fixing plates 506, thereby improving the stability of the operation of the heat exchange bend 510 and the acceleration tube 508.

[0029] A connecting plate 511 is fixedly connected to the surface of the heat exchange bend 510, and a heat exchange plate 512 is fixedly connected to the surface of the connecting plate 511. Thermal grease is filled between the heat exchange plate 512 and the fixing plate 506. The heat exchange plate 512 is fixed to both sides of the heat exchange bend 510 through the connecting plate 511. The heat exchange plate 512 and the fixing plate 506 are in close contact, so that the cold source transported inside the heat exchange bend 510 can be transferred to the fixing plate 506 to cool down the fixing plate 506, thereby enabling the separator plate 2 to cool down the battery module.

[0030] The sealing cover 501 is slidably connected to the partition plate 2. The top of the partition plate 2 is fixedly connected to the limiting block 502, and the bottom of the sealing cover 501 abuts against the limiting block 502. The limiting block 502 limits the sealing cover 501 and can seal the sealing cover 501 to prevent the internal pipes of the partition plate 2 from breaking and causing coolant to leak to the outside and damage the battery.

[0031] A rotating rod 503 is rotatably connected to the middle of the sealing cover 501. Two fixing rings 504 are fixedly connected to the top of the partition plate 2, and the two ends of the rotating rod 503 are engaged with the two fixing rings 504. By rotating the rotating rod 503 on the surface of the sealing cover 501, the rotating rod 503 is engaged with the fixing rings 504, which provides downward pressure to the sealing cover 501 and fixes the sealing cover 501 to the top of the partition plate 2.

[0032] A rotating component 505 is internally engaged with the rotating rod 503. The bottom of the rotating component 505 is a cuboid, which is adapted to the slot of the rotating rod 503. The surface of the fixing plate 506 is slidably connected to the inner wall of the partition plate 2, and the space between the fixing plate 506 and the partition plate 2 is filled with thermal grease. The rotating component 505 is inserted into the rotating rod 503 to facilitate the rotation of the rotating rod 503, thereby controlling whether the rotating rod 503 is engaged with the fixing ring 504. The thermal grease fills the gap between the fixing plate 506 and the partition plate 2, allowing for better heat exchange between the fixing plate 506 and the partition plate 2.

[0033] In use, this invention divides the battery frame 1 into several storage spaces using the partition plate 2, thus evenly distributing the battery modules within these spaces. The inlet pipe 3, through the connecting pipe 509, delivers coolant to the accelerating pipe 508. Accelerated by the accelerating pipe 508, the coolant enters the heat exchange bend 510. The heat exchange bend 510, via the connecting plate 511 and the heat exchange plate 512, transfers the cold source transported within to the fixing plate 506, cooling the fixing plate 506. This, in turn, allows the partition plate 2 to cool and dissipate heat from the battery modules. The coolant flowing out of the heat exchange bend 510 passes through the accelerating pipe 508 and the connecting pipe 509 into the return pipe 4, completing the coolant cooling process. The coolant returning through the return pipe 4 is then cooled by the cooling device. The cooled coolant is then delivered to the inlet pipe 3. When the pipe inside the partition plate 2 is blocked or damaged, the rotating part 505 is inserted into the rotating rod 503 to control the rotation of the rotating rod 503, causing the two ends of the rotating rod 503 to disengage from the fixing ring 504. Then, the two connecting pipes 509 are removed from the surface of the inlet pipe 3 and the return pipe 4. By pulling the sealing cover 501 upward, the cooling mechanism 5 is taken out from inside the partition plate 2. Then, the new cooling mechanism 5 is inserted into the partition plate 2. The rotating part 505 controls the rotation of the rotating rod 503 to make the two ends of the rotating rod 503 engage with the fixing ring 504. Then, the two connecting pipes 509 are connected to the inlet pipe 3 and the return pipe 4. In this way, the replacement and maintenance of the cooling mechanism 5 are completed. The above device reduces the maintenance difficulty of the cooling mechanism 5 and improves the maintenance efficiency of the cooling mechanism 5.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid cooling device for a lithium-ion battery module, comprising a battery frame (1), characterized in that: The battery frame (1) is fixedly connected with equidistant partition plates (2). The battery frame (1) is provided with an inlet pipe (3) and a return pipe (4) on the outside. Each partition plate (2) is provided with a cooling mechanism (5). The cooling mechanism (5) includes a sealing cover (501), a heat exchange bend (510) and two acceleration pipes (508). The two ends of the heat exchange bend (510) are fixedly connected to the two acceleration pipes (508) respectively. The surface of the sealing cover (501) is fixedly connected with two fixing plates (506).

2. The liquid cooling device for a lithium-ion battery module according to claim 1, characterized in that: Each of the acceleration tubes (508) has a fixed connection to a connecting tube (509) at its top end. The top ends of the two connecting tubes (509) penetrate the sealing cap (501), and the two connecting tubes (509) are fixedly connected to the inlet pipe (3) and the return pipe (4) respectively.

3. The liquid cooling device for a lithium-ion battery module according to claim 1, characterized in that: The surface of the acceleration tube (508) abuts against the fixing plate (506), and a fixing rod (507) is provided below the sealing cover (501), and the two ends of the fixing rod (507) are fixedly connected to the two fixing plates (506).

4. The liquid cooling device for a lithium-ion battery module according to claim 1, characterized in that: A connecting plate (511) is fixedly connected to the surface of the heat exchange bend (510), and a heat exchange plate (512) is fixedly connected to the surface of the connecting plate (511). The space between the heat exchange plate (512) and the fixing plate (506) is filled with heat dissipation grease.

5. The liquid cooling device for a lithium-ion battery module according to claim 1, characterized in that: The sealing cover (501) is slidably connected to the partition plate (2), the top of the partition plate (2) is fixedly connected to the limiting block (502), and the bottom of the sealing cover (501) abuts against the limiting block (502).

6. The liquid cooling device for a lithium-ion battery module according to claim 1, characterized in that: The sealing cover (501) is rotatably connected to a rotating rod (503) in the middle, and the top of the partition plate (2) is fixedly connected to two fixing rings (504), and the two ends of the rotating rod (503) are engaged with the two fixing rings (504).

7. A liquid cooling device for a lithium-ion battery module according to claim 6, characterized in that: The rotating rod (503) is internally engaged with a rotating component (505), the surface of the fixing plate (506) is slidably connected to the inner wall of the partition plate (2), and the space between the fixing plate (506) and the partition plate (2) is filled with heat-dissipating silicone grease.

8. The liquid cooling device for a lithium-ion battery module according to claim 1, characterized in that: The acceleration tube (508) is fixedly connected with equidistant convex blocks (513), and the bottoms of the convex blocks (513) are staggered inside the acceleration tube (508), with the wider side of the convex blocks (513) located at the water inlet.

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