Cooling structure of lithium ion battery

Abstract

The utility model discloses a cooling structure of a lithium ion battery, which relates to the technical field of lithium ion batteries and comprises a battery shell, a top cover is fixedly connected to the top of the battery shell through screws, a plurality of grooves are formed in one side of the interior of the top cover and one side of the interior of the battery shell in a staggered manner, single batteries are arranged in the grooves, and the single batteries are connected with the battery shell through screws. A heat dissipation assembly is arranged in the battery shell, the heat dissipation assembly comprises a snake-shaped liquid cooling channel, and the snake-shaped liquid cooling channel is uniformly wound on the peripheral sides of the plurality of single batteries. According to the utility model, the liquid pump conveys the liquid cooling agent in the liquid cooling storage box into the snakelike liquid cooling channel through the water inlet pipe and the water inlet end, so that the liquid cooling agent flows in the snakelike liquid cooling channel and exchanges heat with the plurality of single batteries and use spaces among the plurality of single batteries in the flowing process; and the central positions of the plurality of single batteries can be fully cooled, so that the heat dissipation uniformity and the heat dissipation effect of the structure in the use process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, and more particularly to a cooling structure of a lithium ion battery. Background Art

[0002] Lithium-ion batteries are secondary batteries that mainly rely on the movement of lithium ions between the positive and negative electrodes to work. During long-term use, a large amount of heat will accumulate inside the lithium-ion battery. If it is not cooled in time, it will affect its performance and service life. In serious cases, it will cause certain safety hazards. Therefore, a cooling structure is needed to cool it down.

[0003] For example, Chinese patent document (CN102576830B) discloses a passively cooled lithium-ion battery pack, comprising: a housing having a sidewall and a sidewall opening extending through the sidewall; a plurality of lithium-ion battery cells disposed within the housing, the battery cells having an anode terminal and a cathode terminal; a first current collector and a second current collector disposed within the housing, the first current collector and the second current collector electrically engaging corresponding terminals of the anode terminal and the cathode terminal; a metal plate disposed in the sidewall opening and adjacent to one of the current collectors; and an electrically insulating barrier disposed between the metal plate and an adjacent one of the current collectors, wherein the metal plate draws heat from the adjacent one of the current collectors outwardly into the surrounding environment. However, during use, this structure causes heat in the center of the battery to be difficult to dissipate, which can cause the heat reaction in the center of the lithium-ion battery to lag behind the temperature change outside, resulting in a relatively high internal temperature, which in turn affects the service life and performance of the lithium-ion battery. Therefore, certain improvements are needed. Utility Model Content

[0004] The purpose of the utility model is to provide a cooling structure for a lithium-ion battery, which can achieve the effect of uniformly cooling the center and the outside of the lithium-ion battery.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: A cooling structure for a lithium-ion battery, comprising: a battery housing, a top cover fixedly connected to the top of the battery housing by screws, a plurality of grooves staggeredly formed on the top cover and on one side of the interior of the battery housing, single cells being arranged in the grooves, a heat dissipation assembly being arranged inside the battery housing, the heat dissipation assembly comprising a serpentine liquid cooling channel, the serpentine liquid cooling channel being evenly wound around the outer periphery of the multiple single cells, and limit assemblies being arranged on both sides of the bottom of the serpentine liquid cooling channel;

[0006] The limiting assembly includes a fixing seat, the bottom of the fixing seat is fixedly connected to the top side of the battery shell, a plurality of first cavities are opened on the top side of the fixing seat, a mounting seat is slidably connected inside the first cavity, a connecting block is fixedly connected to the top of the mounting seat, the top of the connecting block is fixedly connected to the bottom of the serpentine liquid cooling channel, a second cavity is provided on both sides of the connecting block, the second cavity is located inside the fixing seat, and a spring is fixedly connected to one side of the second cavity, a sliding block is fixedly connected to the other side of the spring, and a limiting block is fixedly connected to the other side of the sliding block, and the limiting block is provided on the top of the mounting seat.

[0007] Furthermore, one side of the sliding block is fixedly connected to a shift block, and the other side of the shift block extends to the outside of the fixed seat. The shift block, the limit block and the sliding block are all slidably connected inside the fixed seat, and the top side of the two limit blocks is set to be conical.

[0008] Furthermore, the groove is arranged to be circular, and the grooves of the top cover and the battery shell are arranged opposite to each other.

[0009] Furthermore, one side of the serpentine liquid cooling channel is connected to a water inlet end, and the other end of the water inlet end extends to the outside of the battery housing and is connected to a water inlet pipe through a pipeline.

[0010] Furthermore, the other side of the serpentine liquid cooling channel is connected to a liquid outlet end, which extends to the outside of the battery housing and is connected to a liquid outlet pipe through a pipeline, and the other end of the liquid outlet pipe is connected to a liquid cooling storage tank.

[0011] Furthermore, one side of the liquid-cooled storage box is fixedly connected to the outer wall of the battery shell, and a partition is provided on one side of the interior of the liquid-cooled storage box, and a liquid pump is provided on the other side of the partition. The input end of the liquid pump is connected to the liquid coolant inside the liquid-cooled storage box through a pipeline, and the output end of the liquid pump is connected to the water inlet pipe.

[0012] Compared with the existing technology, the beneficial effects of this solution are as follows:

[0013] 1. This solution uses a heat dissipation component and a liquid pump to transport the liquid coolant inside the liquid cooling storage box through the water inlet pipe and the water inlet end to the serpentine liquid cooling channel, so that it flows inside the serpentine liquid cooling channel and exchanges heat with multiple single cells and the use space between multiple single cells during the flow process, so that the center position of multiple single cells can also be fully cooled, ensuring the heat dissipation uniformity and heat dissipation effect of the structure during use. The serpentine liquid cooling channel helps increase the contact area and heat dissipation effect between it and multiple single cells, so as to ensure the overall performance and service life of the lithium-ion battery.

[0014] 2. This solution sets a limit assembly. During the installation process, the serpentine liquid cooling channel will drive the connecting block and the mounting seat into the first cavity and cause the limit block and the sliding block to squeeze the spring. When the serpentine liquid cooling channel is installed, the spring will drive the sliding block and the limit block to reset to limit the installation position of the mounting seat, thereby supporting and fixing the use position of the serpentine liquid cooling channel to prevent the battery housing from shaking and colliding with multiple single batteries when receiving external force, thereby ensuring the protection effect and heat dissipation stability of the product during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure used to embody the utility model;

[0016] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the battery housing used to embody the present invention;

[0017] Figure 3 For the purpose of embodying the present utility model Figure 2 A schematic diagram of the enlarged structure of part A;

[0018] Figure 4 It is a partial three-dimensional structural diagram for reflecting the limiting component in the utility model.

[0019] In the figure: 1. Battery casing; 2. Top cover; 3. Groove; 4. Single battery; 5. Heat dissipation assembly; 501. Serpentine liquid cooling channel; 502. Water inlet end; 503. Water inlet pipe; 504. Liquid cooling storage box; 505. Liquid outlet pipe; 506. Liquid outlet end; 507. Heat dissipation fins; 6. Limiting assembly; 601. Fixing seat; 602. First cavity; 603. Mounting seat; 604. Connecting block; 605. Second cavity; 606. Spring; 607. Sliding block; 608. Limiting block; 609. Dial block. DETAILED DESCRIPTION

[0020] The utility model will be further described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are merely illustrative and do not limit the scope of protection of the utility model.

[0021] Example 1

[0022] A cooling structure for a lithium-ion battery, such as Figures 1-4As shown, it includes: a battery shell 1, a top cover 2 is fixedly connected to the top of the battery shell 1 by screws, a plurality of grooves 3 are staggered on the top cover 2 and one side of the inner part of the battery shell 1, a single battery 4 is arranged inside the groove 3, a heat dissipation component 5 is arranged inside the battery shell 1, and the heat dissipation component 5 includes a serpentine liquid cooling channel 501, the serpentine liquid cooling channel 501 is evenly wound around the outer periphery of the plurality of single batteries 4, and a limiting component 6 is provided on both sides of the bottom of the serpentine liquid cooling channel 501.

[0023] The limiting assembly 6 includes a fixing seat 601, the bottom of the fixing seat 601 is fixedly connected to the top side of the battery housing 1, a plurality of first cavities 602 are opened on the top side of the fixing seat 601, a mounting seat 603 is slidably connected inside the first cavity 602, a connecting block 604 is fixedly connected to the top of the mounting seat 603, the top of the connecting block 604 is fixedly connected to the bottom of the serpentine liquid cooling channel 501, and a second cavity 605 is provided on both sides of the connecting block 604, the second cavity 605 is located inside the fixing seat 601, and a spring 6 is fixedly connected to one side of the second cavity 605. 06, the other side of the spring 606 is fixedly connected to a sliding block 607, and the other side of the sliding block 607 is fixedly connected to a limiting block 608. The limiting block 608 is set on the top of the mounting seat 603, and one side of the sliding block 607 is fixedly connected to a shift block 609, and the other side of the shift block 609 extends to the outside of the fixed seat 601. The shift block 609, the limiting block 608 and the sliding block 607 are all slidably connected inside the fixed seat 601, and the top side of the two limiting blocks 608 is set to a cone shape, the groove 3 is set to a circle, and the top cover 2 and the groove 3 of the battery shell 1 are set relative to each other.

[0024] In actual application, the bottom ends of multiple single cells 4 are first placed in the grooves 3 opened inside the battery shell 1, and then the serpentine liquid cooling channel 501 is vertically installed between the multiple single cells 4 and makes contact with the outer peripheral sides of the multiple single cells 4. Then, the multiple grooves 3 opened on the top side of the top cover 2 are installed toward the multiple single cells 4. Finally, the top cover 2 and the battery shell 1 are fixed by an external device. During the installation process, the serpentine liquid cooling channel 501 will drive the connecting block 604 and the mounting seat 603 to enter the first cavity 602. At this time, the bottom of the mounting seat 603 will first contact the limit block 608. The limit block 608 drives the sliding block 607 to squeeze the spring 606. As the serpentine liquid cooling channel 501 and the mounting seat 603 continue to move downward, when the serpentine liquid cooling channel 501 is installed, the spring 606 will drive the sliding block 607 and the limit block 608 to reset to limit the installation position of the mounting seat 603, and then support and fix the use position of the serpentine liquid cooling channel 501 to prevent the battery housing 1 from shaking and colliding with multiple single batteries 4 when receiving external force, thereby ensuring the protection effect and heat dissipation stability of the product during use.

[0025] Example 2

[0026] A cooling structure for a lithium-ion battery, which is different from that of embodiment 1 in that Figure 1-Figure 2 As shown, one side of the serpentine liquid cooling channel 501 is connected to a water inlet end 502, and the other end of the water inlet end 502 extends to the outside of the battery shell 1 and is connected to a water inlet pipe 503 through a pipeline, and the other side of the serpentine liquid cooling channel 501 is connected to a liquid outlet end 506, and the liquid outlet end 506 extends to the outside of the battery shell 1 and is connected to a liquid outlet pipe 505 through a pipeline, and the other end of the liquid outlet pipe 505 is connected to a liquid cooling storage tank 504, one side of the liquid cooling storage tank 504 is fixedly connected to the outer wall of the battery shell 1, and a partition is provided on one side of the interior of the liquid cooling storage tank 504, and a liquid pump is provided on the other side of the partition, the input end of the liquid pump is connected to the liquid coolant inside the liquid cooling storage tank 504 through a pipeline, and the output end of the liquid pump is connected to the water inlet pipe 503.

[0027] In actual application, during use, the liquid pump transports the liquid coolant inside the liquid cooling storage tank 504 to the inside of the serpentine liquid cooling channel 501 through the water inlet pipe 503 and the water inlet end 502, so that it flows inside the serpentine liquid cooling channel 501, and during the flow, heat is exchanged with multiple single cells 4 and the use space between multiple single cells 4, so that the center position of multiple single cells 4 can also be fully dissipated. This ensures the heat dissipation uniformity and heat dissipation effect of the structure during use, and the serpentine liquid cooling channel 501 helps increase the contact area and heat dissipation effect between it and the multiple single cells 4, so as to ensure the overall performance and service life of the lithium-ion battery.

[0028] Working principle: First, place the bottom ends of multiple single batteries 4 into the grooves 3 opened inside the battery shell 1, then vertically install the serpentine liquid cooling channel 501 between the multiple single batteries 4 and make it contact with the outer peripheral sides of the multiple single batteries 4, then install the multiple grooves 3 opened on the top side of the top cover 2 towards the multiple single batteries 4, and finally fix the top cover 2 and the battery shell 1 through an external device. During use, the liquid pump transports the liquid coolant inside the liquid cooling storage tank 504 through the water inlet pipe 503 and the water inlet end 502 to the inside of the serpentine liquid cooling channel 501, so that it flows inside the serpentine liquid cooling channel 501 and contacts the multiple single batteries 4 during the flow process. And heat exchange is carried out in the use space between multiple single batteries 4, so that the central position of multiple single batteries 4 can also be fully dissipated. During the installation process, the serpentine liquid cooling channel 501 will drive the connecting block 604 and the mounting seat 603 to enter the first cavity 602. At this time, the bottom of the mounting seat 603 will first contact the limit block 608, and the limit block 608 will drive the sliding block 607 to squeeze the spring 606. As the serpentine liquid cooling channel 501 and the mounting seat 603 continue to move downward, when the serpentine liquid cooling channel 501 is installed, the spring 606 will drive the sliding block 607 and the limit block 608 to reset to limit the installation position of the mounting seat 603.

[0029] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A cooling structure for a lithium-ion battery, characterized in that: include: A battery housing (1), wherein a top cover (2) is fixedly connected to the top of the battery housing (1) by screws, a plurality of grooves (3) are staggeredly provided on one side of the top cover (2) and the inside of the battery housing (1), a single battery (4) is provided inside the groove (3), a heat dissipation component (5) is provided inside the battery housing (1), the heat dissipation component (5) includes a serpentine liquid cooling channel (501), the serpentine liquid cooling channel (501) is evenly wound around the outer periphery of the plurality of single batteries (4), and a limiting component (6) is provided on both sides of the bottom of the serpentine liquid cooling channel (501); The limiting assembly (6) comprises a fixing seat (601), the bottom of the fixing seat (601) is fixedly connected to the top side of the battery housing (1), a plurality of first cavities (602) are provided on the top side of the fixing seat (601), a mounting seat (603) is slidably connected inside the first cavity (602), a connecting block (604) is fixedly connected to the top of the mounting seat (603), the top of the connecting block (604) is fixedly connected to the bottom of the serpentine liquid cooling channel (501), a second cavity (605) is provided on both sides of the connecting block (604), the second cavity (605) is located inside the fixing seat (601), and a spring (606) is fixedly connected to one side of the second cavity (605), the other side of the spring (606) is fixedly connected to a sliding block (607), the other side of the sliding block (607) is fixedly connected to a limiting block (608), and the limiting block (608) is provided on the top of the mounting seat (603).

2. A cooling structure for a lithium-ion battery according to claim 1, characterized in that: One side of the sliding block (607) is fixedly connected to a shift block (609), and the other side of the shift block (609) extends to the outside of the fixed seat (601). The shift block (609), the limit block (608) and the sliding block (607) are all slidably connected inside the fixed seat (601), and the top sides of the two limit blocks (608) are set to be conical.

3. A cooling structure for a lithium-ion battery according to claim 2, characterized in that: The groove (3) is arranged in a circular shape, and the groove (3) of the top cover (2) and the battery housing (1) are arranged opposite to each other.

4. A cooling structure for a lithium-ion battery according to claim 3, characterized in that: One side of the serpentine liquid cooling channel (501) is connected to a water inlet end (502), and the other end of the water inlet end (502) extends to the outside of the battery housing (1) and is connected to a water inlet pipe (503) through a pipeline.

5. A cooling structure for a lithium-ion battery according to claim 4, characterized in that: The other side of the serpentine liquid cooling channel (501) is connected to a liquid outlet (506), the liquid outlet (506) extends to the outside of the battery housing (1) and is connected to a liquid outlet pipe (505) through a pipeline, and the other end of the liquid outlet pipe (505) is connected to a liquid cooling storage tank (504).

6. A cooling structure for a lithium-ion battery according to claim 5, characterized in that: One side of the liquid-cooled storage box (504) is fixedly connected to the outer wall of the battery housing (1), and a partition is provided on one side of the interior of the liquid-cooled storage box (504), and a liquid pump is provided on the other side of the partition. The input end of the liquid pump is connected to the liquid coolant inside the liquid-cooled storage box (504) through a pipeline, and the output end of the liquid pump is connected to the water inlet pipe (503).

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