Heat dissipation structure of lithium ion power battery

Abstract

The utility model relates to the technical field of battery heat dissipation, in particular to a lithium ion power battery heat dissipation structure which comprises a bottom plate and baffles, the left side and the right side of the surface of the bottom plate are fixedly connected with two sets of baffles, lithium ion batteries are fixedly installed in the baffles, and a cooling assembly is arranged between the lithium ion batteries. The top of the baffle is fixedly connected with a top plate, and a heat dissipation assembly is arranged in the top plate. The cooling assembly comprises a first heat conduction plate, a second heat conduction plate, a cooling pipe, a connecting pipe and a small water pump. Through the arrangement of the cooling assembly, the first heat conducting plate in close contact with the outer side of the lithium ion battery and the second heat conducting plate connected with the first heat conducting plate, the contact area with air is enlarged, and heat generated by the lithium ion battery is transferred to the first heat conducting plate and the second heat conducting plate; the first heat conducting plate and the second heat conducting plate are subjected to liquid cooling heat dissipation through the cooling pipe wound and connected in the second heat conducting plate, so that the heat dissipation effect of the lithium ion battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heat dissipation, in particular to a heat dissipation structure for a lithium-ion power battery. Background Technique

[0002] At present, lithium-ion power batteries have been widely used in the field of new energy vehicles. In new energy vehicles, a battery module is generally composed of several single power batteries. Taking the battery module as an energy unit, several battery modules are connected in series and parallel to provide energy for the whole vehicle. The power battery has very strict requirements on the working temperature, which affects the performance, reliability, safety and service life of electric vehicles.

[0003] After retrieval, the patent application number is (202021156068.6), which discloses "a lithium-ion power battery with a heat dissipation structure", solving the problem in the prior art that the heat dissipation of lithium-ion batteries is through the heat conduction of the battery body, that is, from the inside of the battery to the outside, transferring heat from the inside to the outside, conducting the heat generated during the charging and discharging process of the battery to the surface of the battery. The heat dissipation structure is simple and the heat dissipation form is relatively passive, resulting in poor heat dissipation effect.

[0004] However, the following problems exist in the above device: The lithium-ion batteries are in close contact with each other, thus affecting the heat dissipation efficiency. The too high temperature inside the lithium-ion battery will lead to the aggravation of electrochemical side reactions, which has a great impact on the battery cycle life. For this reason, we propose a heat dissipation structure for a lithium-ion power battery to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a heat dissipation structure for a lithium-ion power battery to solve the problems mentioned in the above background technique that the batteries are in close contact with each other, thus affecting the heat dissipation efficiency, which will lead to the aggravation of electrochemical side reactions and have a great impact on the battery life.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A heat dissipation structure for a lithium-ion power battery, including a bottom plate and a baffle. Two groups of baffles are fixedly connected to the left and right sides of the surface of the bottom plate. A lithium-ion battery is fixedly installed inside the baffle. A cooling component is arranged between the lithium-ion batteries. The top of the baffle is fixedly connected with a top plate, and a heat dissipation component is arranged inside the top plate.

[0007] The cooling component includes a first heat conducting plate, a second heat conducting plate, a cooling pipe, a connecting pipe and a small water pump. A first heat conducting plate is arranged outside the lithium-ion battery. A second heat conducting plate is arranged between the first heat conducting plates. A cooling pipe is arranged inside the second heat conducting plate. A connecting pipe is arranged at the end of the cooling pipe, and a small water pump is arranged at the end of the connecting pipe.

[0008] Preferably, the heat dissipation component includes a communication groove, a mounting frame and a fan. The surface of the top plate is equidistantly provided with communication grooves. An mounting frame is fixedly installed on the upper side of the communication groove, and a fan is fixedly installed in the mounting frame.

[0009] Preferably, the outer side of the first heat conducting plate is closely attached to the outer surface of the lithium-ion battery. The second heat conducting plates are equidistantly connected between two groups of first heat conducting plates. A hole adapted to the cooling pipe is provided in the second heat conducting plate. A connecting pipe is fixedly connected to the upper side of the small water pump, and the other end of the connecting pipe is fixedly connected to the cooling pipe.

[0010] Preferably, heat dissipation grooves are equidistantly provided in the bottom plate, and the heat dissipation grooves are located at the bottom of the cooling pipe and the central position of the lithium-ion battery.

[0011] Preferably, connection holes are provided on the surface of the top plate at the top of the lithium-ion battery. The connection holes and the communication grooves intersect with each other. Two mounting holes are provided on both sides of the bottom of the baffle.

[0012] Preferably, a temperature sensor is fixedly installed at the central position inside the top plate, and the temperature sensor is electrically connected to the fan and the small water pump.

[0013] Preferably, a rectangle is formed between the first heat conducting plate and the second heat conducting plate. The cross section of the cooling pipe is circular, and a certain gap is left between the cooling pipe and the second heat conducting plate and the first heat conducting plate.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] Through the setting of the cooling component, the first heat conducting plate in close contact with the outside of the lithium-ion battery and the second heat conducting plate connected to the first heat conducting plate are used to expand the contact area with the air, and the heat generated by the lithium-ion battery is transferred to the first heat conducting plate and the second heat conducting plate. Through the cooling pipe wound and connected in the second heat conducting plate, liquid cooling heat dissipation is carried out on the first heat conducting plate and the second heat conducting plate, thereby improving the heat dissipation effect of the lithium-ion battery.

[0016] Through the setting of the heat dissipation component, the fan is started to perform air cooling heat dissipation on the lithium-ion battery and the cooling pipe. By arranging the cooling pipe in the first heat conducting plate and the second heat conducting plate and making reasonable use of the space layout, the hot air is taken out through the gap between them at the heat dissipation groove, thereby improving the heat exchange effect. That is, the lithium-ion battery has corresponding structures for both air cooling and liquid cooling heat dissipation methods. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Front view structural schematic diagram of the present invention;

[0019] Figure 2 Structural schematic diagram at the cooling component of the present invention;

[0020] Figure 3 Rear view structural schematic diagram of the present invention;

[0021] Figure 4 Structural schematic diagram at the heat dissipation component of the present invention;

[0022] Figure 5 Side view cross-sectional structural schematic diagram of the present invention.

[0023] In the figure: 1, bottom plate; 2, baffle; 3, lithium-ion battery; 4, cooling component; 401, first heat conduction plate; 402, second heat conduction plate; 403, cooling pipe; 404, connecting pipe; 405, small water pump; 5, top plate; 6, heat dissipation component; 61, communication groove; 62, mounting rack; 63, fan; 7, heat dissipation groove; 8, connection hole; 9, mounting hole; 10, temperature sensor. Specific embodiments

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Please refer to Figures 1-5 , an embodiment provided by the present invention: a heat dissipation structure for a lithium-ion power battery, including a bottom plate 1 and a baffle 2. Two groups of baffles 2 are fixedly connected to the left and right sides of the surface of the bottom plate 1. A lithium-ion battery 3 is fixedly installed in the baffle 2. A cooling component 4 is arranged between the lithium-ion batteries 3. The top of the baffle 2 is fixedly connected to a top plate 5. A heat dissipation component 6 is arranged in the top plate 5;

[0026] The cooling component 4 includes a first heat conducting plate 401, a second heat conducting plate 402, a cooling pipe 403, a connecting pipe 404 and a small water pump 405. The first heat conducting plate 401 is arranged outside the lithium-ion battery 3, the second heat conducting plate 402 is arranged between the first heat conducting plates 401, the cooling pipe 403 is arranged inside the second heat conducting plate 402, the connecting pipe 404 is arranged at the end of the cooling pipe 403, and the small water pump 405 is arranged at the end of the connecting pipe 404;

[0027] By arranging the cooling component 4 and the heat dissipation component 6, the present device solves the problem that the batteries are in close contact with each other, which affects the heat dissipation efficiency, causes the electrochemical side reaction to intensify, and has a great impact on the battery life.

[0028] Furthermore, the heat dissipation component 6 includes a communication groove 61, a mounting frame 62 and a fan 63. The communication grooves 61 are equidistantly arranged on the surface of the top plate 5. The mounting frame 62 is fixedly installed on the upper side of the communication groove 61, and the fan 63 is fixedly installed inside the mounting frame 62. As Figure 4 shown, this structure is used to dissipate heat from the lithium-ion battery 3, the first heat conducting plate 401, the second heat conducting plate 402 and the cooling pipe 403 by starting the fan 63, and take out the hot air at the bottom of the top plate 5.

[0029] Furthermore, the outer side of the first heat conducting plate 401 is closely attached to the outer surface of the lithium-ion battery 3. The second heat conducting plates 402 are equidistantly connected between two groups of the first heat conducting plates 401. The holes adapted to the cooling pipe 403 are arranged inside the second heat conducting plate 402. The connecting pipe 404 is fixedly connected to the upper side of the small water pump 405, and the other end of the connecting pipe 404 is fixedly connected to the cooling pipe 403. As Figure 2 shown, this structure is used to expand the contact area with the air through the first heat conducting plate 401 and the second heat conducting plate 402, improve the heat dissipation effect of the lithium-ion battery 3, start the small water pump 405, and quickly cool the first heat conducting plate 401 and the second heat conducting plate 402 through the cooling pipe 403.

[0030] Furthermore, heat dissipation grooves 7 are equidistantly arranged inside the bottom plate 1, and the heat dissipation grooves 7 are located at the bottom of the central positions of the cooling pipe 403 and the lithium-ion battery 3. As Figure 2 shown, this structure is used to increase the fluidity of the wind force through the heat dissipation grooves 7, so that the air outside the lithium-ion battery 3 flows more smoothly

[0031] Furthermore, connection holes 8 are arranged on the surface of the top plate 5 at the top of the lithium-ion battery 3. The connection holes 8 and the communication grooves 61 are staggered from each other, avoiding affecting the use of the lithium-ion battery 3 and enhancing the aesthetics at the same time. Two groups of mounting holes 9 are arranged on both sides of the bottom of the baffle 2. As Figure 4 shown, this structure is used to facilitate the connection between the external device and the lithium-ion battery 3 through the connection holes 8, and facilitate the fixed installation of the device under the action of the mounting holes 9.

[0032] Further, a temperature sensor 10 is fixedly installed at the central position inside the top plate 5, and the temperature sensor 10 is electrically connected to the fan 63 and the small water pump 405. As Figure 3 shown, this structure is used to detect the temperature of the lithium-ion battery 3 through the temperature sensor 10 to prevent the lithium-ion battery 3 from being affected by excessive temperature during use.

[0033] Further, a rectangle is formed between the first heat conducting plate 401 and the second heat conducting plate 402, and the cross section of the cooling pipe 403 is circular. There is a certain gap between the cooling pipe 403 and the second heat conducting plate 402 and the first heat conducting plate 401. As Figure 5 shown, this structure is used to rationally utilize the space layout among the cooling pipe 403, the second heat conducting plate 402 and the first heat conducting plate 401 to improve the space utilization rate, and at the same time ensure the close contact between the first heat conducting plate 401 and the lithium-ion battery 3 to improve the heat dissipation efficiency.

[0034] Working principle: During use, as Figure 1 and Figure 4 shown, first install the device through the installation holes 9 on both sides, and then connect it to other devices through the connection holes 8 on the top. After being fixed, when the lithium-ion battery 3 operates and generates heat, as Figure 2 and Figure 3 shown, the contact area with the air is enlarged through the first heat conducting plate 401 and the second heat conducting plate 402, and the heat generated by the lithium-ion battery 3 is transferred to the first heat conducting plate 401 and the second heat conducting plate 402 to dissipate the heat of the lithium-ion battery 3. When the temperature sensor 10 detects that the temperature is too high, the fan 63 and the small water pump 405 are started. The small water pump 405 quickly cools the first heat conducting plate 401 and the second heat conducting plate 402 through the cooling pipe 403. At the same time, as Figure 4 shown, the fan 63 dissipates the heat of the lithium-ion battery 3, the first heat conducting plate 401, the second heat conducting plate 402 and the cooling pipe 403, and discharges the hot air at the bottom of the top plate 5 from the gap through the heat dissipation groove 7, improving the heat exchange effect. The above is all the working principles of the present utility model.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A lithium-ion power battery heat dissipation structure, characterized in that: The invention comprises a bottom plate (1) and a baffle plate (2), wherein two groups of baffle plates (2) are fixedly connected to the left and right sides of the surface of the bottom plate (1), lithium-ion batteries (3) are fixedly installed in the baffle plates (2), a cooling assembly (4) is arranged between the lithium-ion batteries (3), a top plate (5) is fixedly connected to the top of the baffle plate (2), and a heat dissipation assembly (6) is arranged in the top plate (5); The cooling assembly (4) comprises a first heat conducting plate (401), a second heat conducting plate (402), a cooling pipe (403), a connecting pipe (404) and a small water pump (405); the first heat conducting plate (401) is arranged outside the lithium ion battery (3); the second heat conducting plate (402) is arranged between the first heat conducting plates (401); the cooling pipe (403) is arranged inside the second heat conducting plate (402); the end of the cooling pipe (403) is provided with a connecting pipe (404); and the end of the connecting pipe (404) is provided with a small water pump (405).

2. A lithium-ion power battery heat dissipation structure according to claim 1, characterized in that: The heat dissipation assembly (6) comprises a connecting groove (61), a mounting frame (62) and a fan (63); the connecting grooves (61) are equidistantly provided on the surface of the top plate (5); the mounting frame (62) is fixedly mounted on the upper side of the connecting groove (61); and the fan (63) is fixedly mounted inside the mounting frame (62).

3. A lithium-ion power battery heat dissipation structure according to claim 1, characterized in that: The outer side of the first heat conducting plate (401) is tightly fitted with the outer surface of the lithium-ion battery (3); the second heat conducting plate (402) is equidistantly connected between the two groups of first heat conducting plates (401); a hole matching the cooling pipe (403) is provided in the second heat conducting plate (402); a connecting pipe (404) is fixedly connected to the upper side of the small water pump (405); and the other end of the connecting pipe (404) is fixedly connected to the cooling pipe (403).

4. A lithium-ion power battery heat dissipation structure according to claim 1, characterized in that: Heat dissipation grooves (7) are arranged at equal intervals in the bottom plate (1), and the heat dissipation grooves (7) are located at the bottom of the center of the cooling pipe (403) and the lithium-ion battery (3).

5. The heat dissipation structure of a lithium-ion power battery according to claim 1, characterized in that: A connection hole (8) is provided on the surface of the top plate (5) located at the top of the lithium-ion battery (3), the connection hole (8) and the connecting groove (61) are interlaced with each other, and two groups of mounting holes (9) are provided on both sides of the bottom of the baffle (2).

6. A lithium-ion power battery heat dissipation structure according to claim 1, characterized in that: A temperature sensor (10) is fixedly installed at the center position of the inner side of the top plate (5), and the temperature sensor (10) is connected to the fan (63) and the small water pump (405) by electric wires.

7. A lithium-ion power battery heat dissipation structure according to claim 1, characterized in that: The first heat conducting plate (401) and the second heat conducting plate (402) form a rectangle, the cross section of the cooling tube (403) is circular, and a certain gap is left between the cooling tube (403) and the second heat conducting plate (402) and the first heat conducting plate (401).

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